As filed with the Securities and Exchange Commission on February 28, 201727, 2019
 
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D. C. 20549

FORM 10-K
(MARK ONE)
 Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
  For the Fiscal Year Ended December 31, 20162018
  or
 Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
  
For the transition period from                  to                 

Commission File No. 1-6571

Merck & Co., Inc.
2000 Galloping Hill Road
Kenilworth, N. J. 07033
(908) 740-4000
Incorporated in New Jersey 
I.R.S. Employer
Identification No. 22-1918501
Securities Registered pursuant to Section 12(b) of the Act:
Securities Registered pursuant to Section 12(b) of the Act:
Title of Each Class 
Name of Each Exchange
on which Registered
Common Stock ($0.50 par value) New York Stock Exchange
1.125% Notes due 2021 New York Stock Exchange
0.500% Notes due 2024 New York Stock Exchange
1.875% Notes due 2026 New York Stock Exchange
2.500% Notes due 2034 New York Stock Exchange
1.375% Notes due 2036 New York Stock Exchange
Number of shares of Common Stock ($0.50 par value) outstanding as of January 31, 2017: 2,745,571,067.2019: 2,581,220,308.
Aggregate market value of Common Stock ($0.50 par value) held by non-affiliates on June 30, 20162018 based on closing price on June 30, 2016: $159,263,000,000.2018: $161,991,000,000.
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes        No  
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes        No  
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes        No  
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes        No  
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”filer,” “smaller reporting company,” and “smaller reporting“emerging growth company” in Rule 12b-2 of the Exchange Act. (Check One):
Large accelerated filerAccelerated filer
Non-accelerated filerSmaller reporting company
   (Do not check if a smaller reporting company)Emerging growth company
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes        No  
Documents Incorporated by Reference:
Documents Incorporated by Reference:
Document Part of Form 10-K
Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017,
28, 2019, to be filed with the
Securities and Exchange Commission within 120 days after the close of the fiscal year covered by this report
 Part III

Table of Contents
   Page
Item 1.
Item 1A.
 
Item 1B.
Item 2.
Item 3.
Item 4.
 
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
 (a)
  
  
 (b)
Item 9.
Item 9A.
 
Item 9B.
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.
Item 15.
   
Item 16.
 

PART I
 
Item 1.Business.
Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines, vaccines, biologic therapies and animal health products. The Company’s operations are principally managed on a products basis and include four operating segments, which are the Pharmaceutical, Animal Health, Healthcare Services and Alliances segments.
The Pharmaceutical segment is the only reportable segment. The Pharmaceutical segment includes human health pharmaceutical and vaccine products marketed either directly by the Company or through joint ventures.products. Human health pharmaceutical products consist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. The Company sells these human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy benefit managers and other institutions. VaccineHuman health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. Sales of vaccines in most major European markets were marketed through the Company’s Sanofi Pasteur MSD joint venture until its termination on December 31, 2016. Beginning in 2017, Merck will record vaccine sales in the European markets, which were previously part of the joint venture.
The Company also has animal health operations that discover, develop, manufactureAnimal Health segment discovers, develops, manufactures and marketmarkets animal health products, including vaccines,pharmaceutical and vaccine products, for the prevention, treatment and control of disease in all major livestock and companion animal species, which the Company sells to veterinarians, distributors and animal producers.
The Company’s Healthcare Services segment provides services and solutions that focus on engagement, health analytics and clinical services to improve the value of care delivered to patients. Merck’s
The Alliances segment primarily includes results from the Company’s relationship with AstraZeneca LP until the terminationrelated to sales of that relationship on June 30, 2014. On October 1, 2014, the Company divested its Consumer Care segment that developed, manufacturedNexium and marketed over-the-counter, foot care and sun care products. Prilosec, which concluded in 2018.
The Company was incorporated in New Jersey in 1970.
For financial information and other information about the Company’s segments, see Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Item 8. “Financial Statements and Supplementary Data” below.
All product or service marks appearing in type form different from that of the surrounding text are trademarks or service marks owned, licensed to, promoted or distributed by Merck, its subsidiaries or affiliates, except as noted. All other trademarks or services marks are those of their respective owners.
Product Sales
Total Company sales, including sales of the Company’s top pharmaceutical products, as well as total sales of animal health products, were as follows:
($ in millions)2016 2015 20142018 2017 2016
Total Sales$39,807
 $39,498
 $42,237
$42,294
 $40,122
 $39,807
Pharmaceutical35,151
 34,782
 36,042
37,689
 35,390
 35,151
Keytruda7,171
 3,809
 1,402
Januvia/Janumet6,109
 6,014
 6,002
5,914
 5,896
 6,109
Zetia/Vytorin3,701
 3,777
 4,166
Gardasil/Gardasil 9
2,173
 1,908
 1,738
3,151
 2,308
 2,173
ProQuad/M-M-R II/Varivax
1,640
 1,505
 1,394
1,798
 1,676
 1,640
Keytruda1,402
 566
 55
Isentress1,387
 1,511
 1,673
Remicade1,268
 1,794
 2,372
Cubicin1,087
 1,127
 25
Singulair915
 931
 1,092
Zetia/Vytorin1,355
 2,095
 3,701
Isentress/Isentress HD1,140
 1,204
 1,387
Bridion917
 704
 482
Pneumovax 23
641
 542
 746
907
 821
 641
NuvaRing902
 761
 777
Simponi893
 819
 766
Animal Health3,478
 3,331
 3,454
4,212
 3,875
 3,478
Consumer Care(1)

 3
 1,547
Other Revenues(2)
1,178
 1,382
 1,194
Livestock2,630
 2,484
 2,287
Companion Animals1,582
 1,391
 1,191
Other Revenues(1)
393
 857
 1,178
(1) 
On October 1, 2014, the Company divested its Consumer Care segment that developed, manufactured and marketed over-the-counter, foot care and sun care products.
(2)
Other revenues are primarily comprised of Healthcare Services segment revenue, third-party manufacturing sales, and miscellaneous corporate revenues, including revenue hedging activities, and third-party manufacturing sales.activities.

Pharmaceutical
The Company’sPharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products includeconsist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. Human health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at physician offices. Certain of the products within the Company’s franchises are as follows:
Primary Care and Women’s HealthOncology
Cardiovascular:Keytruda Zetia (ezetimibe) (marketed(pembrolizumab), the Company’s anti-PD-1 (programmed death receptor-1) therapy, as Ezetrol in most countries outside the United States); Vytorin (ezetimibe/simvastatin) (marketed as Inegy outside the United States); and Atozet (ezetimibe and atorvastatin) (marketed in certain countries outside of the United States), cholesterol modifying medicines.
Diabetes: Januvia (sitagliptin) and Janumet (sitagliptin/metformin HCl) for the treatment of type 2 diabetes.
General Medicine and Women’s Health: NuvaRing (etonogestrel/ethinyl estradiol vaginal ring), a vaginal contraceptive product; Implanon (etonogestrel implant), a single-rod subdermal contraceptive implant/Nexplanon (etonogestrel implant), a single, radiopaque, rod-shaped subdermal contraceptive implant; Dulera Inhalation Aerosol (mometasone furoate/formoterol fumarate dihydrate), a combination medicine for the treatment of asthma; and Follistim AQ (follitropin beta injection) (marketed as Puregon in most countries outside the United States), a fertility treatment.
Hospital and Specialty
Hepatitis: Zepatier (elbasvir and grazoprevir) for the treatment of adult patients with chronic hepatitis C virus (HCV) genotype (GT) 1 or GT4 infection, with ribavirin in certain patient populations; and PegIntron (peginterferon alpha-2b) and Victrelis (boceprevir), medicines for the treatment of chronic HCV.
HIV: Isentress (raltegravir), an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1 infection.
Hospital Acute Care: Cubicin (daptomycin for injection), an I.V. antibiotic for complicated skin and skin structure infections or bacteremia, when caused by designated susceptible organisms; Noxafil (posaconazole) for the prevention of invasive fungal infections; Invanz (ertapenem sodium)monotherapy for the treatment of certain infections; Cancidas (caspofungin acetate), an anti-fungal product; Bridion (sugammadex) Injection, a medication for the reversal of two types of neuromuscular blocking agents used during surgery; and Primaxin (imipenem and cilastatin sodium), an anti-bacterial product.
Immunology: Remicade (infliximab), a treatment for inflammatory diseases; and Simponi (golimumab), a once-monthly subcutaneous treatment for certain inflammatory diseases, which the Company markets in Europe, Russia and Turkey.
Oncology
Keytruda (pembrolizumab) for the treatment of previously untreated metastaticpatients with non-small-cell lung cancer (NSCLC) in patients whose tumors express high levels of PD-L1 (Tumor Proportion Score [TPS] of 50% or more) and previously treated metastatic NSCLC in patients whose tumors express PD-L1 (TPS of 1% or more), as well as advanced melanoma, and previously treated recurrent or metastaticclassical Hodgkin Lymphoma (cHL), urothelial carcinoma, head and neck cancer;squamous cell carcinoma (HNSCC), gastric or gastroesophageal junction adenocarcinoma, and microsatellite instability-high (MSI-H) or mismatch repair deficient cancer, and in combination with chemotherapy in certain patients with NSCLC. Keytruda is also used in the United States for monotherapy treatment of certain patients with cervical cancer, primary mediastinal large B-cell lymphoma (PMBCL), hepatocellular carcinoma, and Merkel cell carcinoma, and in combination with chemotherapy for patients with squamous NSCLC; Emend (aprepitant) for the prevention of chemotherapy-induced and post-operative nausea and vomiting; and Temodar (temozolomide) (marketed as Temodal outside the United States), a treatment for certain types of brain tumors.
Diversified Brands
Respiratory: Singulair (montelukast), a medicine indicated for In addition, the chronic treatmentCompany recognizes alliance revenue related to sales of asthma and the relief of symptoms of allergic rhinitis; and Nasonex (mometasone furoate monohydrate)Lynparza (olaparib), an inhaled nasal corticosteroidoral poly (ADP-ribose) polymerase (PARP) inhibitor, for the treatmentcertain types of nasal allergy symptoms.
Other: Cozaar (losartan potassium)ovarian and Hyzaar (losartan potassiumbreast cancer; and hydrochlorothiazide), treatmentsLenvima (lenvatinib) for hypertension; Arcoxia (etoricoxib)certain types of thyroid cancer, hepatocellular carcinoma, and in combination for the treatment of arthritis and pain, which the Company markets outside the United States; certain patients with renal cell carcinoma.Fosamax (alendronate sodium) (marketed as Fosamac in Japan) for the treatment and prevention of osteoporosis; and Zocor (simvastatin), a statin for modifying cholesterol.

Vaccines
Gardasil (Human Papillomavirus Quadrivalent [Types 6, 11, 16 and 18] Vaccine, Recombinant)/Gardasil 9 (Human Papillomavirus 9-valent Vaccine, Recombinant), vaccines to help prevent certain diseases caused by certain types of human papillomavirus (HPV); ProQuad (Measles, Mumps, Rubella and Varicella Virus Vaccine Live), a pediatric combination vaccine to help protect against measles, mumps, rubella and varicella; M-M-R II (Measles, Mumps and Rubella Virus Vaccine Live), a vaccine to help prevent measles, mumps and rubella; Varivax (Varicella Virus Vaccine Live), a vaccine to help prevent chickenpox (varicella); ZostavaxPneumovax (Zoster Vaccine Live)23 (pneumococcal vaccine polyvalent), a vaccine to help prevent shingles (herpes zoster)pneumococcal disease; ; RotaTeq (Rotavirus Vaccine, Live Oral, Pentavalent), a vaccine to help protect against rotavirus gastroenteritis in infants and children; and PneumovaxZostavax 23 (pneumococcal vaccine polyvalent)(Zoster Vaccine Live), a vaccine to help prevent pneumococcal disease.shingles (herpes zoster).
Hospital Acute Care
Bridion (sugammadex) Injection, a medication for the reversal of two types of neuromuscular blocking agents used during surgery; Noxafil (posaconazole) for the prevention of invasive fungal infections; Invanz (ertapenem sodium) for the treatment of certain infections; Cubicin (daptomycin for injection), an I.V. antibiotic for complicated skin and skin structure infections or bacteremia, when caused by designated susceptible organisms; Cancidas (caspofungin acetate), an anti-fungal product; Primaxin (imipenem and cilastatin sodium), an anti-bacterial product; and Zerbaxa (ceftolozane and tazobactam) is currently approved in the United States for the treatment of adult patients with complicated urinary tract infections caused by certain susceptible Gram-negative microorganisms, and is also indicated, in combination with metronidazole, for the treatment of adult patients with complicated intra-abdominal infections caused by certain susceptible Gram-negative and Gram-positive microorganisms.
Immunology
Simponi (golimumab), a once-monthly subcutaneous treatment for certain inflammatory diseases; and Remicade (infliximab), a treatment for inflammatory diseases, which the Company markets in Europe, Russia and Turkey.
Neuroscience
Belsomra (suvorexant), an orexin receptor antagonist indicated for the treatment of insomnia, characterized by difficulties with sleep onset and/or sleep maintenance.
Virology
Isentress/Isentress HD (raltegravir), an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1 infection; and Zepatier (elbasvir and grazoprevir) for the treatment of adult patients with chronic hepatitis C virus (HCV) genotype (GT) 1 or GT4 infection, with ribavirin in certain patient populations.

Cardiovascular
Zetia (ezetimibe) (marketed as Ezetrol in most countries outside the United States); Vytorin (ezetimibe/simvastatin) (marketed as Inegy outside the United States); Atozet (ezetimibe and atorvastatin) (marketed in certain countries outside of the United States) and Rosuzet (ezetimibe and rosuvastatin) (marketed in certain countries outside of the United States), cholesterol modifying medicines; and Adempas (riociguat), a cardiovascular drug for the treatment of pulmonary arterial hypertension.
Diabetes
Januvia (sitagliptin) and Janumet (sitagliptin/metformin HCl) for the treatment of type 2 diabetes.
Women’s Health
NuvaRing (etonogestrel/ethinyl estradiol vaginal ring), a vaginal contraceptive product; and Implanon (etonogestrel implant), a single-rod subdermal contraceptive implant/Nexplanon (etonogestrel implant), a single, radiopaque, rod-shaped subdermal contraceptive implant.
Animal Health
The Animal Health segment discovers, develops, manufactures and markets animal health products, including vaccines.pharmaceutical and vaccine products, for the prevention, treatment and control of disease in all major livestock and companion animal species. Principal products in this segment include:
Livestock Products:Products
Nuflor (Florfenicol) antibiotic range for use in cattle and swine; Bovilis/Vista vaccine lines for infectious diseases in cattle; Banamine (Flunixin meglumine) bovine and swine anti-inflammatory; Estrumate (cloprostenol sodium) for the treatment of fertility disorders in cattle; Matrix (altrenogest) fertility management for swine; Resflor (florfenicol and flunixin meglumine), a combination broad-spectrum antibiotic and non-steroidal anti-inflammatory drug for bovine respiratory disease; Zuprevo (Tildipirosin) for bovine respiratory disease; Zilmax (zilpaterol hydrochloride) and Revalor (trenbolone acetate and estradiol) to improve production efficiencies in beef cattle; Safe-Guard (fenbendazole) de-wormer for cattle; M+Pac (Mycoplasma Hyopneumoniae Bacterin) swine pneumonia vaccine; and Porcilis (Lawsonia intracellularis baterin) and Circumvent (Porcine Circovirus Vaccine, Type 2, Killed Baculovirus Vector) vaccine lines for infectious diseases in swine.
Poultry Products:swine; Nobilis/Innovax (Live Marek’s Disease Vector), vaccine lines for poultry; and Paracox and Coccivac coccidiosis vaccines.vaccines; Exzolt, a systemic treatment for poultry red mite infestations; Slice (Emamectin benzoate) parasiticide for sea lice in salmon; Aquavac (Avirulent Live Culture)/Norvax vaccines against bacterial and viral disease in fish; Compact PD vaccine for salmon; and Aquaflor (Florfenicol) antibiotic for farm-raised fish.
Companion Animal Products: Products
Bravecto (fluralaner), a line of oral and topical products that kills fleas and ticks in dogs and cats for up to 12 weeks; Nobivac vaccine lines for flexible dog and cat vaccination; Otomax (Gentamicin sulfate, USP; Betamethasone valerate USP; and Clotrimazole USP ointment)/Mometamax (Gentamicin sulfate, USP, Mometasone Furoate Monohydrate and Clotrimazole, USP, Otic Suspension)/Posatex (Orbifloxacin, Mometasone Furoate Monohydrate and Posaconazole, Suspension) ear ointments for acute and chronic otitis; Caninsulin/Vetsulin (porcine insulin zinc suspension) diabetes mellitus treatment for dogs and cats; Panacur (fenbendazole)/Safeguard (fenbendazole) broad-spectrum anthelmintic (de-wormer) for use in many animals; Regumate (altrenogest) fertility management for horses; Prestige vaccine line for horses; and Activyl (Indoxacrb)/Scalibor (Deltamethrin)/Exspot for protecting against bites from fleas, ticks, mosquitoes and sandflies.
Aquaculture Products: Slice (Emamectin benzoate) parasiticide for sea lice in salmon; Aquavac (Avirulent Live Culture)/Norvax vaccines against bacterial and viral disease in fish; Compact PD vaccine for salmon; and Aquaflor (Florfenicol) antibiotic for farm-raised fish.
For a further discussion of sales of the Company’s products, see Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” below.

2018 Product Approvals

Product Approvals
In January 2016, Merck announced that the U.S. Food and Drug Administration (FDA) approved Zepatier for the treatmentSet forth below is a summary of adult patients with chronic HCV GT1 or GT4 infection, with ribavirin in certain patient populations.
In February 2016, Merck announced that the FDA approved a supplemental new drug application for single-dose Emend for injection for the prevention of delayed nausea and vomiting in adults receiving initial and repeat courses of moderately emetogenic chemotherapy.
In May 2016,significant product approvals received by the Company received marketing approval from the European Medicines Agency (EMA) for Bravecto Spot-On Solution for cats and dogs and, in July 2016, the Company received approval in the United States to market the product under the tradename Bravecto Topical.2018.
ProductDateApproval
KeytrudaDecember 2018
The Japanese Ministry of Health, Labor and Welfare (JMHLW) approved Keytruda for three expanded uses in unresectable, advanced or recurrent NSCLC, one in malignant melanoma, as well as a new indication in high microsatellite instability solid tumors.
December 2018
The U.S. Food and Drug Administration (FDA) approved Keytruda for the treatment of adult and pediatric patients with recurrent locally advanced or metastatic Merkel cell carcinoma.
December 2018
The European Commission (EC) approved Keytruda for the adjuvant treatment of adults with stage III melanoma and lymph node involvement who have undergone complete resection.
November 2018
FDA approved Keytruda for the treatment of patients with hepatocellular carcinoma who have been previously treated with sorafenib.
October 2018
FDA approved Keytruda, in combination with carboplatin and either paclitaxel or nab-paclitaxel, for the first-line treatment of patients with metastatic squamous non-small cell lung cancer (NSCLC).
September 2018
EC approved Keytruda in combination with pemetrexed and platinum chemotherapy for the first-line treatment of metastatic nonsquamous NSCLC in adults whose tumors have no EGFR or ALK positive mutations.
September 2018
EC approved Keytruda for the treatment of recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) in adults whose tumors express PD-L1 with a ≥ 50% TPS and progressing on or after platinum-containing chemotherapy.
August 2018
FDA approved Keytruda in combination with pemetrexed and platinum chemotherapy for the first-line treatment of metastatic nonsquamous NSCLC patients with no EGFR or ALK genomic tumor aberrations.
July 2018
The China National Drug Administration (CNDA) approved Keytruda for the treatment of adult patients with unresectable or metastatic melanoma following failure of one prior line of therapy.
June 2018
FDA approved Keytruda for the treatment of adult and pediatric patients with refractory primary mediastinal large B-cell lymphoma (PMBCL), or who have relapsed after two or more prior lines of therapy.
June 2018
FDA approved Keytruda for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after chemotherapy whose tumors express PD-L1 as determined by an FDA-approved test.
Lynparza(1)
December 2018FDA approved Lynparza for use as maintenance treatment of certain patients with advanced ovarian, fallopian tube or primary peritoneal cancer who are in complete or partial response to first-line platinum-based chemotherapy.
July 2018
JMHLW approved Lynparza for use in patients with unresectable or recurrent BRCA-mutated, human epidermal growth factor receptor 2 (HER2)-negative breast cancer who have received prior chemotherapy.
May 2018
EC approved Lynparza for use as a maintenance therapy in patients with platinum-sensitive relapsed high grade epithelial ovarian, fallopian tube, or primary peritoneal cancer, who are in response (complete or partial) to platinum based chemotherapy regardless of BRCA mutation status.
January 2018
FDA approved Lynparza for use in patients with BRCA-mutated, HER2-negative metastatic breast cancer who have been previously treated with chemotherapy.
January 2018
JMHLW approved Lynparza for use as a maintenance therapy in patients with platinum-sensitive relapsed ovarian cancer, regardless of BRCA mutation status.

In July 2016, the European Commission (EC) approved Zepatier, a once-daily, single tablet combination therapy in the treatment of chronic HCV GT1 or GT4 infection, with ribavirin in certain patient populations.
In August 2016, Merck announced that the FDA approved Keytruda for the treatment of patients with recurrent or metastatic head and neck cancer with disease progression on or after platinum-containing chemotherapy.
In October 2016, Merck announced that the FDA approved Keytruda for the first-line treatment of patients with NSCLC whose tumors have high PD-L1 expression (TPS of 50% or more) as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations.
In addition, in October 2016, Merck announced that the FDA approved Zinplava Injection 25 mg/mL. Zinplava is indicated to reduce recurrence of Clostridium difficile infection (CDI) in patients 18 years of age or older who are receiving antibacterial drug treatment of CDI and are at high risk for CDI recurrence.
On January 3, 2017, Merck announced that the EC has approved Keytruda for the first-line treatment of metastatic NSCLC in adults whose tumors have high PD-L1 expression (TPS of 50% or more) with no EGFR or ALK positive tumor mutations.
Joint Ventures
Sanofi Pasteur MSD
On December 31, 2016, Merck and Sanofi Pasteur (Sanofi) terminated the equally-owned joint venture formed by the companies in 1994 to develop and market human vaccines in Europe.
Licenses
In 1998, a subsidiary of Schering-Plough Corporation (Schering-Plough) entered into a licensing agreement with Centocor Ortho Biotech Inc. (Centocor), a Johnson & Johnson (J&J) company, to market Remicade, which is prescribed for the treatment of inflammatory diseases. In 2005, Schering-Plough’s subsidiary exercised an option under its contract with Centocor for license rights to develop and commercialize Simponi, a fully human monoclonal antibody. The Company has marketing rights to both products throughout Europe, Russia and Turkey. Remicade lost market exclusivity in major European markets in February 2015 and the Company no longer has market exclusivity in any of its marketing territories. The Company continues to have market exclusivity for Simponi in all of its marketing territories. All profits derived from Merck’s distribution of the two products in these countries are equally divided between Merck and J&J.
Lenvima(2)
September 2018CNDA approved Lenvima for the treatment of certain patients with hepatocellular carcinoma.
August 2018FDA approved Lenvima for the treatment of certain patients with hepatocellular carcinoma.
August 2018EC approved Lenvima for the treatment of certain patients with hepatocellular carcinoma.
March 2018JMHLW approved Lenvima for the treatment of certain patients with unresectable hepatocellular carcinoma.
Gardasil 9
October 2018
FDA approved Gardasil 9 for an expanded age indication for use in women and men ages 27 to 45 for the prevention of certain cancers and diseases caused by the nine HPV types covered by the vaccine.
April 2018
CNDA approved Gardasil 9 for use in girls and women ages 16 to 26.
DelstrigoNovember 2018
EC approved Delstrigo (doravirine, lamivudine, and tenofovir disoproxil fumarate) for the treatment of adults infected with human immunodeficiency virus (HIV-1) without past or present evidence of resistance to the non-nucleoside reverse transcriptase inhibitor (NNRTI) class, lamivudine, or tenofovir.
August 2018
FDA approved Delstrigo for the treatment of HIV-1 infection in adult patients with no prior antiretroviral treatment experience.
PifeltroNovember 2018
EC approved Pifeltro (doravirine), in combination with other antiretroviral medicinal products, for the treatment of adults infected with HIV-1 without past or present evidence of resistance to the NNRTI class.
August 2018
FDA approved Pifeltro for the treatment of HIV-1 infection in adult patients with no prior antiretroviral treatment experience.
IsentressMarch 2018
EC approved Isentress for an extension to the existing indication to cover treatment of neonates. Isentress is now indicated in combination with other anti-retroviral medicinal products for the treatment of HIV-1 infection.
PrevymisJanuary 2018
EC approved Prevymis (letermovir) for the prophylaxis of cytomegalovirus (CMV) reactivation and disease in adult CMV-seropositive recipients [R+] of an allogeneic hematopoietic stem cell transplant.
Steglatro, Steglujan and Segluromet(3)
March 2018
EC approved Steglatro (ertugliflozin), Steglujan (ertugliflozin and sitagliptin) and Segluromet (ertugliflozin and metformin hydrochloride) for the treatment of adults aged 18 years and older with type 2 diabetes mellitus as an adjunct to diet and exercise to improve glycaemic control (as monotherapy in patients for whom the use of metformin is considered inappropriate due to intolerance or contraindications, and in addition to other medicinal products for the treatment of diabetes).
VaxelisDecember 2018
FDA approved Vaxelis (Diphtheria and Tetanus Toxoids and Acellular Pertussis Adsorbed, Inactivated Poliovirus, Haemophilus b Conjugate [Meningococcal Protein Conjugate] and Hepatitis B [Recombinant] Vaccine) for use in children from 6 weeks through 4 years of age (prior to the 5th birthday)
(1)
In July 2017, Merck and AstraZeneca entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza.
(2)
In March 2018, Merck and Eisai Co., Ltd. announced a strategic collaboration for the worldwide co-development and co-commercialization of Eisai’s Lenvima.
(3)
In 2013, Merck and Pfizer Inc. announced that they entered into a worldwide collaboration, except Japan, for the co-development and co-promotion of ertugliflozin.
Competition and the Health Care Environment
Competition
The markets in which the Company conducts its business and the pharmaceutical industry in general are highly competitive and highly regulated. The Company’s competitors include other worldwide research-based pharmaceutical companies, smaller research companies with more limited therapeutic focus, generic drug manufacturers and animal health care companies. The Company’s operations may be adversely affected by generic and biosimilar competition as the Company’s products mature, as well as technological advances of competitors, industry consolidation,

patents granted to competitors, competitive combination products, new products of competitors, the generic availability of competitors’ branded products, and new information from clinical trials of marketed products or post-marketing surveillance. In addition, patent rights are increasingly being challenged by competitors, and the outcome can be highly uncertain. An adverse result in a patent dispute can preclude commercialization of products or negatively affect sales of existing products and could result in the payment of royalties or in the recognition of an impairment charge with respect to intangible assets associated with certain products. Competitive pressures have intensified as pressures in the industry have grown.
Pharmaceutical competition involves a rigorous search for technological innovations and the ability to market these innovations effectively. With its long-standing emphasis on research and development, the Company is well positionedwell-positioned to compete in the search for technological innovations. Additional resources required to meet market challenges include quality control, flexibility to meet customer specifications, an efficient distribution system and a strong technical information service. The Company is active in acquiring and marketing products through external alliances, such as licensing arrangements and collaborations, and has been refining its sales and marketing efforts to further address

changing industry conditions. However, the introduction of new products and processes by competitors may result in price reductions and product displacements, even for products protected by patents. For example, the number of compounds available to treat a particular disease typically increases over time and can result in slowed sales growth or reduced sales for the Company’s products in that therapeutic category.
The highly competitive animal health business is affected by several factors including regulatory and legislative issues, scientific and technological advances, product innovation, the quality and price of the Company’s products, effective promotional efforts and the frequent introduction of generic products by competitors.
Health Care Environment and Government Regulation
Global efforts toward health care cost containment continue to exert pressure on product pricing and market access. In the United States, federal and state governments for many years also have pursued methods to reduce the cost of drugs and vaccines for which they pay. For example, federal laws require the Company to pay specified rebates for medicines reimbursed by Medicaid and to provide discounts for outpatient medicines purchased by certain Public Health Service entities and hospitals serving a disproportionate share of low income or uninsured patients.
Against this backdrop, the United States enacted major health care reform legislation in 2010 (the Patient Protection and Affordable Care Act (ACA)), which began to be implemented in 2010.. Various insurance market reforms have since advanced and state and federal insurance exchanges were launched in 2014. With respect to the effect of the law on the pharmaceutical industry, the law increased the mandated Medicaid rebate from 15.1% to 23.1%, expanded the rebate to Medicaid managed care utilization, and increased the types of entities eligible for the federal 340B drug discount program. The law also requires pharmaceutical manufacturers to pay a 50% point of service discount to Medicare Part D beneficiaries when they are in the Medicare Part D coverage gap (i.e., the so-called “donut hole”). Approximately $415$365 million, $550$385 million and $430$415 million was recorded by Merck as a reduction to revenue in 2016, 20152018, 2017 and 2014,2016, respectively, related to the donut hole provision. Beginning in 2019, the 50% point of service discount will increase to a 70% point of service discount in the coverage gap, as a result of the Balanced Budget Act of 2018. In addition, the 70% point of service discount will be extended to biosimilar products. Also, pharmaceutical manufacturers are now required to pay an annual non-tax deductible health care reform fee. The total annual industry fee was $3.0$4.1 billion in 20162018 and will increasedecrease to $4.0$2.8 billion in 2017.2019 and is currently planned to remain at that amount thereafter. The fee is assessed on each company in proportion to its share of prior year branded pharmaceutical sales to certain government programs, such as Medicare and Medicaid. The Company recorded $193$124 million, $173$210 million and $390$193 million of costs within MarketingSelling, general and administrative expenses in 2016, 20152018, 2017 and 2014,2016, respectively, for the annual health care reform fee. The higher expenses in 2014 reflect final regulations on the annual health care reform fee issued by the Internal Revenue Service (IRS) on July 28, 2014. The final IRS regulations accelerated the recognition criteria for the fee obligation by one year to the year in which the underlying sales used to allocate the fee occurred rather than the year in which the fee was paid. As a result of this change, Merck recorded an additional year of expense of $193 million in 2014. In February 2016, the Centers for Medicare & Medicaid Services (CMS) issued the Medicaid rebate final rule that implements provisions of the ACA effective April 1, 2016. The rule provides comprehensive guidance on the calculation of Average Manufacturer Price and Best Price; two metrics utilized to determine the rebates drug manufacturers are required to pay to state Medicaid programs. The impact of changes resulting from the issuance of the rule is not material to Merck at this time. However, the Company is still awaiting guidance from CMS on two aspects of the rule that were deferred for later implementation. These include a definition of what constitutes a product ‘line extension’ and a delay in the participation of the U.S. Territories in the Medicaid Drug Rebate Program until April 1, 2020. The Company will evaluate the financial impact of these two elements when they become effective.

There is significant uncertainty about the future of the ACA in particular and healthcarehealth care laws in general in the United States. The Company is participating in the debate, and monitoring how any proposed changes could affect its business. The Company is unable to predict the likelihood of changes to the ACA. Depending on the nature of any repeal and replacement of the ACA, such actions could have a material adverse effect on the Company’s business, cash flow, results of operations, financial condition or business.position and prospects.
Also, during 2016, the Vermont legislatureA number of states have passed a pharmaceutical price and cost transparency law. The law requireslaws. These laws typically require manufacturers identified by the Vermont Green Mountain Care Board to report certain product price information or other financial data to the Vermont Attorney General. The Attorney General is thenstate. In the case of a California law, manufacturers also are required to submit a report to the legislature. A numberprovide advance notification of other states have introduced legislation of this kind and theprice increases. The Company expects that states will continue their focus on pharmaceutical price transparency. The extenttransparency and that this focus will continue to which these proposals will pass into law is unknown at this time.exert pressure on product pricing.
The Company also faces increasing pricing pressure globally from managed care organizations, government agencies and programs that could negatively affect the Company’s sales and profit margins. In the United States, these

include (i) practices of managed care organizations, federal and state exchanges, and institutional and governmental purchasers, and (ii) U.S. federal laws and regulations related to Medicare and Medicaid, including the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 and the ACA.
Changes to the health care system enacted as part of health care reform in the United States, as well as increased purchasing power of entities that negotiate on behalf of Medicare, Medicaid, and private sector beneficiaries, could result in further pricing pressures. As an example, health care reform is contributing to an increase in the number of patients in the Medicaid program under which sales of pharmaceutical products are subject to substantial rebates.
In addition, in the effort to contain the U.S. federal deficit, the pharmaceutical industry could be considered a potential source of savings via legislative proposals that have been debated but not enacted. These types of revenue generating or cost saving proposals include additional direct price controls in the Medicare prescription drug program (Part D). In addition, Congress may again consider proposals to allow, under certain conditions, the importation of medicines from other countries. It remains very uncertain as to what proposals, if any, may be included as part of future federal budget deficit reduction proposals that would directly or indirectly affect the Company.
In the U.S. private sector, consolidation and integration among healthcarehealth care providers is a major factor in the competitive marketplace for pharmaceutical products. Health plans and pharmacy benefit managers have been consolidating into fewer, larger entities, thus enhancing their purchasing strength and importance. Private third-party insurers, as well as governments, increasingly employ formularies to control costs by negotiating discounted prices in exchange for formulary inclusion. Failure to obtain timely or adequate pricing or formulary placement for Merck’s products or obtaining such pricing or placement at unfavorable pricing could adversely impact revenue. In addition to formulary tier co-pay differentials, private health insurance companies and self-insured employers have been raising co-payments required from beneficiaries, particularly for branded pharmaceuticals and biotechnology products. Private health insurance companies also are increasingly imposing utilization management tools, such as clinical protocols, requiring prior authorization for a branded product if a generic product is available or requiring the patient to first fail on one or more generic products before permitting access to a branded medicine. These same utilization management tools are also used in treatment areas in which the payer has taken the position that multiple branded products are therapeutically comparable. As the U.S. payer market concentrates further and as more drugs become available in generic form, pharmaceutical companies may face greater pricing pressure from private third-party payers.
In order to provide information about the Company’s pricing practices, the Company recently postedannually posts on its website its first Pricing Action Transparency Report for the United States for the years 2010 - 2016.States. The report provides the Company’s average annual list price and net price increases across the Company’s U.S. portfolio dating back to 2010. The report shows that the Company’s average annual net price increases (after taking sales deductions such as rebates, discounts and returns into account) across the U.S. human health portfolio have been in the low to mid-single digits since 2010.  Additionally, the weighted average annual discount rate has been steadily increasing over time, reflecting the competitive market for branded medicines and the impact of the ACA. In 2016, the Company’s gross U.S. sales were reduced by 40.9% as a result of rebates, discounts and returns.
Efforts toward health care cost containment also remain intense in European countries. The Company faces competitive pricing pressure resulting from generic and biosimilar drugs. In addition, a majority of countries in Europe attempt to contain drug costs by engaging in reference pricing in which authorities examine pre-determined markets for published prices of drugs by brand. The authorities then use price data from those markets to set new local prices for brand-name drugs, including the Company’s. Guidelines for examining reference pricing are usually set in local markets and can be changed pursuant to local regulations.

In addition, in Japan, the pharmaceutical industry is subject to government-mandated biennial price reductions of pharmaceutical products and certain vaccines, which occurred in 2016.2018. Furthermore, the government can order repricings for classes of drugs if it determines that it is appropriate under applicable rules.
Certain markets outside of the United States have also implemented other cost management strategies, such as health technology assessments (HTA), which require additional data, reviews and administrative processes, all of which increase the complexity, timing and costs of obtaining product reimbursement and exert downward pressure on available reimbursement. In the United States, HTAs are also being used by government and private payers.
The Company’s focus on emerging markets has continued. Governments in many emerging markets are also focused on constraining health care costs and have enacted price controls and related measures, such as compulsory

licenses, that aim to put pressure on the price of pharmaceuticals and constrain market access. The Company anticipates that pricing pressures and market access challenges will continue in 20172019 to varying degrees in the emerging markets.
Beyond pricing and market access challenges, other conditions in emerging market countries can affect the Company’s efforts to continue to grow in these markets, including potential political instability, changes in trade sanctions and embargoes, significant currency fluctuation and controls, financial crises, limited or changing availability of funding for health care, and other developments that may adversely impact the business environment for the Company. Further, the Company may engage third-party agents to assist in operating in emerging market countries, which may affect its ability to realize continued growth and may also increase the Company’s risk exposure.
In addressing cost containment pressures, the Company engages in public policy advocacy with policymakers and continues to work to demonstrate that its medicines provide value to patients and to those who pay for health care. The Company advocates with government policymakers to encourage a long-term approach to sustainable health care financing that ensures access to innovative medicines and does not disproportionately target pharmaceuticals as a source of budget savings. In markets with historically low rates of health care spending, the Company encourages those governments to increase their investments and adopt market reforms in order to improve their citizens’ access to appropriate health care, including medicines.
Operating conditions have become more challenging under the global pressures of competition, industry regulation and cost containment efforts. Although no one can predict the effect of these and other factors on the Company’s business, the Company continually takes measures to evaluate, adapt and improve the organization and its business practices to better meet customer needs and believes that it is well positionedwell-positioned to respond to the evolving health care environment and market forces.
The pharmaceutical industry is also subject to regulation by regional, country, state and local agencies around the world focused on standards and processes for determining drug safety and effectiveness, as well as conditions for sale or reimbursement.
Of particular importance is the FDA in the United States, which administers requirements covering the testing, approval, safety, effectiveness, manufacturing, labeling, and marketing of prescription pharmaceuticals. In some cases, the FDA requirements and practices have increased the amount of time and resources necessary to develop new products and bring them to market in the United States. At the same time, the FDA has committed to expediting the development and review of products bearing the “breakthrough therapy” designation, which has accelerated the regulatory review process for medicines with this designation. The FDA has also undertaken efforts to bring generic competition to market more efficiently and in a more timely manner.
The European Union (EU) has adopted directives and other legislation concerning the classification, labeling, advertising, wholesale distribution, integrity of the supply chain, enhanced pharmacovigilance monitoring and approval for marketing of medicinal products for human use. These provide mandatory standards throughout the EU, which may be supplemented or implemented with additional regulations by the EU member states. The Company’s policies and procedures are already consistent with the substance of these directives; consequently, it is believed that they will not have any material effect on the Company’s business.
The Company’s business in China has grown rapidly in the past few years, and the importance of China to the Company’s overall pharmaceutical and vaccines business has increased accordingly. Continued growth of the Company’s business in China is dependent upon ongoing development of a favorable environment for innovative pharmaceutical products and vaccines, sustained access for the Company’s current in-line products, and the absence

of trade impediments or adverse pricing controls. In recent years, the Chinese government has introduced and implemented a number of structural reforms to accelerate the shift to innovative products and reduce costs. Since 2017, there have been multiple new policies introduced by the government to improve access to new innovation, reduce the complexity of regulatory filings, and accelerate the review and approval process. This has led to a significant expansion of the new products being approved each year. Additionally, in 2017, the government updated the National Reimbursement Drug List for the first time in eight years. While the mechanism for drugs being added to the list evolves, it is likely that in the future, inclusion will require a price negotiation which could impact the outlook in the market for selected brands. While pricing pressure has always existed in China, health care reform has led to the acceleration of generic substitution, through a pilot tendering process for mature products that have generic substitutes with a Generic Quality Consistency Evaluation approval.
The Company believes that it will continue to be able to conduct its operations, including launching new drugs, in this regulatory environment. (See “Research and Development” below for a discussion of the regulatory approval process.)
Access to Medicines
As a global health care company, Merck’s primary role is to discover and develop innovative medicines and vaccines. The Company also recognizes that it has an important role to play in helping to improve access to its products around the world. The Company’s efforts in this regard are wide-ranging and include a set of principles that the Company strives to embed into its operations and business strategies to guide the Company’s worldwide approach to expanding access to health care. In addition, the Company has many far-reaching philanthropic programs. The Merck Patient Assistance Program provides medicines and adult vaccines for free to people in the United States who do not have prescription drug or health insurance coverage and who, without the Company’s assistance, cannot afford their Merck medicine and vaccines. In 2011, Merck launched “Merck for Mothers,” a long-term effort with global health partners to end preventable deaths from complications of pregnancy and childbirth. Merck has also provided funds to the Merck Foundation, an independent organization, which has partnered with a variety of organizations dedicated to improving global health.

Privacy and Data Protection
The Company is subject to a significant number of privacy and data protection laws and regulations globally, many of which place restrictions on the Company’s ability to transfer, access and use personal data across its business. The legislative and regulatory landscape for privacy and data protection continues to evolve. There has been increased attention to privacy and data protection issues in both developed and emerging markets with the potential to affect directly the Company’s business, including athe new EU General Data Protection Regulation, which will become effective inwent into effect on May 25, 2018 and imposeimposes penalties up to 4% of global revenue, additionalrevenue. Additional laws and regulations enacted in the United States, Europe, Asia and Latin America, increasedincreases enforcement and litigation activity in the United States and other developed markets, and increasedincreases regulatory cooperation among privacy authorities globally. The Company has adopted a comprehensive global privacy program to manage these evolving risks which has been certified as compliant with and approved by the Asia Pacific Economic Cooperation Cross-Border Privacy Rules System, the EU-U.S. Privacy Shield Program, and the Binding Corporate Rules in the EU.
Distribution
The Company sells its human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers, such as health maintenance organizations, pharmacy benefit managers and other institutions. Human health vaccines are sold primarily to physicians, wholesalers, physician distributors and government entities. The Company’s professional representatives communicate the effectiveness, safety and value of the Company’s pharmaceutical and vaccine products to health care professionals in private practice, group practices, hospitals and managed care organizations. The Company sells its animal health products to veterinarians, distributors and animal producers.
Raw Materials
Raw materials and supplies, which are generally available from multiple sources, are purchased worldwide and are normally available in quantities adequate to meet the needs of the Company’s business.

Patents, Trademarks and Licenses
Patent protection is considered, in the aggregate, to be of material importance to the Company’s marketing of its products in the United States and in most major foreign markets. Patents may cover products per se, pharmaceutical formulations, processes for or intermediates useful in the manufacture of products or the uses of products. Protection for individual products extends for varying periods in accordance with the legal life of patents in the various countries. The protection afforded, which may also vary from country to country, depends upon the type of patent and its scope of coverage.
The Food and Drug Administration Modernization Act includes a Pediatric Exclusivity Provision that may provide an additional six months of market exclusivity in the United States for indications of new or currently marketed drugs if certain agreed upon pediatric studies are completed by the applicant. Current U.S. patent law provides additional patent term for periods when the patented product was under regulatory review by the FDA. The EU also provides an additional six months of pediatric market exclusivity attached to a product’s Supplementary Protection Certificate (SPC). Japan provides the additional term for pediatric studies attached to market exclusivity unrelated to patent rights.

Patent portfolios developed for products introduced by the Company normally provide market exclusivity. The Company has the following key patent protection in the United States, the EU and Japan (including the potential for patent term extensions (PTE) and SPCs where indicated) for the following marketed products:

ProductYear of Expiration (U.S.)
Year of Expiration (EU)(1)
Year of Expiration (Japan)Year of Expiration (U.S.)
Year of Expiration (EU)(1)
Year of Expiration (Japan)(3)
Invanz2017 (composition)2017N/A
ArcoxiaNot Marketed2017Not Marketed
Cancidas2017 (formulation)20172019
ZostavaxExpired2018 (use)N/A
Dulera
2017 (formulation)/
2020 (combination)
N/A
Zetia(2)
201720182019
Vytorin20172019
Asmanex2018 (formulation)2020 (formulation)
NuvaRing(3)
2018 (delivery system)N/A
EmendExpired2019
Emend for Injection
2019(4)
2020(4)
20202019
2020(2)
2020
Follistim AQ2019 (formulation)
Noxafil2019N/A2019N/A
RotaTeq2019Expired
Recombivax2020 (method of making)Expired
Vaxelis(4)
2020 (method of making)
2021(5) (SPCs)
Not Marketed
Januvia
2022(4)
2025-2026(5)
2022(2)
2025-2026
Janumet
2022(4)
2023N/A
2022(2)
2023N/A
Janumet XR
2022(4)
N/A
2022(2)
N/A
Isentress
2023(4)
2022(4)
20222024
2022(2)
2022
Simponi
N/A(6)
2024
N/A(6)
N/A(6)
2025(7)
N/A(6)
Lenvima(8)
2025(2) (with pending PTE)
2021 (patents), 2026(2) (SPCs)
2026
Adempas(9)
2026(2)
2028(2)
2027-2028
Bridion
2026(4) (with pending PTE)
20232024
2026(2) (with pending PTE)
20232024
Nexplanon2027 (device)2025 (device)Not Marketed2027 (device)2025 (device)Not Marketed
Bravecto2027 (with pending PTE)2025 (patent), 2029 (SPCs)20292027 (with pending PTE)2025 (patents), 2029 (SPCs)2029
Gardasil2028
2021(4)
20172028
2021(2)
Expired
Gardasil 9
2028
2025 (patent), 2030(4) (SPCs)
N/A2028
2025 (patents), 2030(2) (SPCs)
N/A
Keytruda2028
2028 (patent), 2030(4) (SPCs)
2032 (with pending PTE)2028
2028 (patents), 2030(2) (SPCs)
2032
Lynparza(10)
2028(2) (with pending PTE)
2024 (patents), 2029(2) (SPCs)
2028-2029 (with pending PTE)
Zerbaxa
2028(4) (with pending PTE)
2023 (patent), 2028(4) (SPCs)
N/A
2028(2) (with pending PTE)
2023 (patents), 2028(2) (SPCs)
N/A
Sivextro
2028(4)
2024 (patent), 2029(4) (SPCs)
N/A
2028(2)
2024 (patents), 2029(2) (SPCs)
2029 (with pending PTE)
Zinplava2028 (with pending PTE)
2025(7)
N/A
Belsomra
2029(4)
N/A2031
2029(2)
N/A2031
Zepatier
2031(4)
2030 (patent), 2031(4) (SPCs)
2030
Prevymis
2029(2) (with pending PTE)
2024 (patents), 2029(2) (SPCs)
2029 (with pending PTE)
Steglatro(11)
2031(2) (with pending PTE)
2029 (patents), 2034(2) (SPCs)
N/A
Steglujan(11)
2031 (with pending PTE)
2029 (patents), 2034 (SPCs)N/A
Segluromet(11)
2031 (with pending PTE)2029 (patents), 2034 (SPCs)N/A
Delstrigo2032 (with pending PTE)
2031(12)
N/A
Pifeltro2032 (with pending PTE)
2031(12)
N/A
N/A:Currently no marketing approval.
Note:Compound patent unless otherwise noted. Certain of the products listed may be the subject of patent litigation. See Item 8. “Financial Statements and Supplementary Data,” Note 10.11. “Contingencies and Environmental Liabilities” below.
(1) 
The EU date represents the expiration date for the following five countries: France, Germany, Italy, Spain and the UKUnited Kingdom (Major EU Markets). If an SPC hasapplications have been filed but have not been granted in some but not all Major EU Markets, both the patent expiry date and the SPC expiry date are listed.
(2) 
By agreement, a generic manufacturer launched a generic version of Zetia in the United States in December 2016.
(3)
In August 2016, a district court decision found invalid the Company’s patent claiming NuvaRing’s delivery system. That decision is currently under appeal.
(4)
Eligible for 6 months Pediatric Exclusivity.
(5)(3) 
The PTE system in Japan allows for a patent to be extended more than once provided the later approval is directed to a different indication from that of the previous approval. This may result in multiple PTE approvals for a given patent, each with its own expiration date.
(4)
Being commercialized in a U.S.-based joint partnership with Sanofi Pasteur.
(5)
SPCs are granted in four Major EU Markets and pending in one, based on a patent that expired in 2016.
(6) 
The Company has no marketing rights in the U.S. and Japan.
(7) 
Includes Pediatric Exclusivity, which is granted in four Major EU Markets and pending in one.
(8)
Being developed and commercialized in a global strategic oncology collaboration with Eisai.
(9)
Being commercialized in a worldwide collaboration with Bayer AG.
(10)
Being developed and commercialized in a global strategic oncology collaboration with AstraZeneca.
(11)
Being developed and promoted in a worldwide, except Japan, collaboration with Pfizer.
(12)
SPC applications to be filed by July 2017. Expected expiry 2030. Eligible for pediatric exclusivity.May 2019.

While the expiration of a product patent normally results in a loss of market exclusivity for the covered pharmaceutical product, commercial benefits may continue to be derived from: (i) later-granted patents on processes and intermediates related to the most economical method of manufacture of the active ingredient of such product; (ii) patents relating to the use of such product; (iii) patents relating to novel compositions and formulations; and (iv) in the United States and certain other countries, market exclusivity that may be available under relevant law. The effect of product patent expiration on pharmaceutical products also depends upon many other factors such as the nature of the market and the position of the product in it, the growth of the market, the complexities and economics of the process for manufacture of the active ingredient of the product and the requirements of new drug provisions of the Federal Food, Drug and Cosmetic Act or similar laws and regulations in other countries.

Additions to market exclusivity are sought in the United States and other countries through all relevant laws, including laws increasing patent life. Some of the benefits of increases in patent life have been partially offset by an

increase in the number of incentives for and use of generic products. Additionally, improvements in intellectual property laws are sought in the United States and other countries through reform of patent and other relevant laws and implementation of international treaties.
The Company has the following key U.S. patent protection for drug candidates under review in the United States by the FDA. Additional patent term may be provided for these pipeline candidates based on Patent Term Restoration and Pediatric Exclusivity. 
Under Review (in the U.S.)
Currently Anticipated
Year of Expiration (in the U.S.)
V419 (pediatric hexavalent combinationV920 (ebola vaccine)2020 (method of making)2023
MK-7655A (relebactam + imipenem/cilastatin)2029
The Company also has the following key U.S. patent protection for drug candidates in Phase 3 development: 
Phase 3 Drug Candidate
Currently Anticipated
Year of Expiration (in the U.S.)
V920 (ebola vaccine)
MK-1242 (vericiguat)(1)
20232031
MK-8228 (letermovir)2024
MK-0859 (anacetrapib)MK-7264 (gefapixant)2027
MK-7655A (relebactam + imipenem/cilastatin)2030
MK-8931 (verubecestat)2030
MK-1439 (doravirine)2031
MK-8835 (ertuglifozin)2030
MK-8835A (ertuglifozin + sitagliptin)2030
MK-8835B (ertuglifozin + metformin)2030
MK-1242 (vericiguat)V114 (pneumoconjugate vaccine)2031
(1)
Being developed in a worldwide clinical development collaboration with Bayer AG.
Unless otherwise noted, the patents in the above charts are compound patents. Each patent is subject to any future patent term restoration of up to five years and six month pediatric market exclusivity, either or both of which may be available. In addition, depending on the circumstances surrounding any final regulatory approval of the compound, there may be other listed patents or patent applications pending that could have relevance to the product as finally approved; the relevance of any such application would depend upon the claims that ultimately may be granted and the nature of the final regulatory approval of the product. Also, regulatory exclusivity tied to the protection of clinical data is complementary to patent protection and, in some cases, may provide more effective or longer lasting marketing exclusivity than a compound’s patent estate. In the United States, the data protection generally runs five years from first marketing approval of a new chemical entity, extended to seven years for an orphan drug indication and 12 years from first marketing approval of a biological product.
For further information with respect to the Company’s patents, see Item 1A. “Risk Factors” and Item 8. “Financial Statements and Supplementary Data,” Note 10.11. “Contingencies and Environmental Liabilities” below.
Worldwide, all of the Company’s important products are sold under trademarks that are considered in the aggregate to be of material importance. Trademark protection continues in some countries as long as used; in other countries, as long as registered. Registration is for fixed terms and can be renewed indefinitely.
Royalty income in 20162018 on patent and know-how licenses and other rights amounted to $222$135 million. Merck also incurred royalty expenses amounting to $1.1$1.3 billion in 20162018 under patent and know-how licenses it holds.
Research and Development
The Company’s business is characterized by the introduction of new products or new uses for existing products through a strong research and development program. Approximately 12,300At December 31, 2018, approximately 14,500 people arewere employed in the Company’s research activities. Research and development expenses were $10.1 billion in 2016, $6.7 billion in 2015 and $7.2 billion in 2014 (which included restructuring costs and acquisition and divestiture-related costs in all years). The Company prioritizes its research and development efforts and focuses on candidates that it believes represent breakthrough science that will make a difference for patients and payers.

The Company maintains a number of long-term exploratory and fundamental research programs in biology and chemistry as well as research programs directed toward product development. The Company’s research and development model is designed to increase productivity and improve the probability of success by prioritizing the Company’s research and development resources on candidates the Company believes are capable of providing unambiguous, promotable advantages to patients and payers and delivering the maximum value of its approved medicines and vaccines through new indications and new formulations. Merck is pursuing emerging product opportunities independent of therapeutic area or modality (small molecule, biologics and vaccines) and is building its biologics capabilities. The Company is committed to makingensuring that externally sourced programs a greater remain an important

component of its pipeline strategy, with a focus on supplementing its internal research with a licensing and external alliance strategy focused on the entire spectrum of collaborations from early research to late-stage compounds, as well as access to new technologies.
The Company also reviews its pipeline to examine candidates whichthat may provide more value through out-licensing. The Company continues to evaluate certain late-stage clinical development and platform technology assets to determine their out-licensing or sale potential.
The Company’s clinical pipeline includes candidates in multiple disease areas, including atherosclerosis, cancer, cardiovascular diseases, diabetes, infectious diseases, inflammatory/autoimmune diseases, neurodegenerativeneurosciences, obesity, pain, respiratory diseases, and respiratory diseases.vaccines.
In the development of human health products, industry practice and government regulations in the United States and most foreign countries provide for the determination of effectiveness and safety of new chemical compounds through preclinical tests and controlled clinical evaluation. Before a new drug or vaccine may be marketed in the United States, recorded data on preclinical and clinical experience are included in the New Drug Application (NDA) for a drug or the Biologics License Application (BLA) for a vaccine or biologic submitted to the FDA for the required approval.
Once the Company’s scientists discover a new small molecule compound or biologic that they believe has promise to treat a medical condition, the Company commences preclinical testing with that compound. Preclinical testing includes laboratory testing and animal safety studies to gather data on chemistry, pharmacology, immunogenicity and toxicology. Pending acceptable preclinical data, the Company will initiate clinical testing in accordance with established regulatory requirements. The clinical testing begins with Phase 1 studies, which are designed to assess safety, tolerability, pharmacokinetics, and preliminary pharmacodynamic activity of the compound in humans. If favorable, additional, larger Phase 2 studies are initiated to determine the efficacy of the compound in the affected population, define appropriate dosing for the compound, as well as identify any adverse effects that could limit the compound’s usefulness. In some situations, the clinical program incorporates adaptive design methodology to use accumulating data to decide how to modify aspects of the ongoing clinical study as it continues, without undermining the validity and integrity of the trial. One type of adaptive clinical trial is an adaptive Phase 2a/2b trial design, a two-stage trial design consisting of a Phase 2a proof-of-concept stage and a Phase 2b dose-optimization finding stage. If data from the Phase 2 trials are satisfactory, the Company commences large-scale Phase 3 trials to confirm the compound’s efficacy and safety. Another type of adaptive clinical trial is an adaptive Phase 2/3 trial design, a study that includes an interim analysis and an adaptation that changes the trial from having features common in a Phase 2 study (e.g. multiple dose groups) to a design similar to a Phase 3 trial. An adaptive Phase 2/3 trial design reduces timelines by eliminating activities which would be required to start a separate study. Upon completion of Phase 3 trials, if satisfactory, the Company submits regulatory filings with the appropriate regulatory agencies around the world to have the product candidate approved for marketing. There can be no assurance that a compound that is the result of any particular program will obtain the regulatory approvals necessary for it to be marketed.
Vaccine development follows the same general pathway as for drugs. Preclinical testing focuses on the vaccine’s safety and ability to elicit a protective immune response (immunogenicity). Pre-marketing vaccine clinical trials are typically done in three phases. Initial Phase 1 clinical studies are conducted in normal subjects to evaluate the safety, tolerability and immunogenicity of the vaccine candidate. Phase 2 studies are dose-ranging studies. Finally, Phase 3 trials provide the necessary data on effectiveness and safety. If successful, the Company submits regulatory filings with the appropriate regulatory agencies.
In the United States, the FDA review process begins once a complete NDA or BLA is submitted, received and accepted for review by the agency. Within 60 days after receipt, the FDA determines if the application is sufficiently complete to permit a substantive review. The FDA also assesses, at that time, whether the application will be granted

a priority review or standard review. Pursuant to the Prescription Drug User Fee Act V (PDUFA), the FDA review period target for NDAs or original BLAs is either six months, for priority review, or ten months, for a standard review, from the time the application is deemed sufficiently complete. Once the review timelines are determined, the FDA will generally act upon the application within those timelines, unless a major amendment has been submitted (either at the Company’s own initiative or the FDA’s request) to the pending application. If this occurs, the FDA may extend the review period to allow for review of the new information, but by no more than three months. Extensions to the review period are communicated to the Company. The FDA can act on an application either by issuing an approval letter or by issuing a Complete Response Letter (CRL) stating that the application will not be approved in its present form and describing all deficiencies that the FDA has identified. Should the Company wish to pursue an application after receiving

a CRL, it can resubmit the application with information that addresses the questions or issues identified by the FDA in order to support approval. Resubmissions are subject to review period targets, which vary depending on the underlying submission type and the content of the resubmission.
The FDA has four program designations — Fast Track, Breakthrough Therapy, Accelerated Approval, and Priority Review — to facilitate and expedite development and review of new drugs to address unmet medical needs in the treatment of serious or life-threatening conditions. The Fast Track designation provides pharmaceutical manufacturers with opportunities for frequent interactions with FDA reviewers during the product’s development and the ability for the manufacturer to do a rolling submission of the NDA/BLA. A rolling submission allows completed portions of the application to be submitted and reviewed by the FDA on an ongoing basis. The Breakthrough Therapy designation provides manufacturers with all of the features of the Fast Track designation as well as intensive guidance on implementing an efficient development program for the product and a commitment by the FDA to involve senior managers and experienced staff in the review. The Accelerated Approval designation allows the FDA to approve a product based on an effect on a surrogate or intermediate endpoint that is reasonably likely to predict a product’s clinical benefit and generally requires the manufacturer to conduct required post-approval confirmatory trials to verify the clinical benefit. The Priority Review designation means that the FDA’s goal is to take action on the NDA/BLA within six months, compared to ten months under standard review.
In addition, under the Generating Antibiotic Incentives Now Act, the FDA may grant Qualified Infectious Disease Product (QIDP) status to antibacterial or antifungal drugs intended to treat serious or life threatening infections including those caused by antibiotic or antifungal resistant pathogens, novel or emerging infectious pathogens, or other qualifying pathogens. QIDP designation offers certain incentives for development of qualifying drugs, including Priority Review of the NDA when filed, eligibility for Fast Track designation, and a five-year extension of applicable exclusivity provisions under the Food, Drug and Cosmetic Act.
The primary method the Company uses to obtain marketing authorization of pharmaceutical products in the EU is through the “centralized procedure.” This procedure is compulsory for certain pharmaceutical products, in particular those using biotechnological processes, and is also available for certain new chemical compounds and products. A company seeking to market an innovative pharmaceutical product through the centralized procedure must file a complete set of safety data and efficacy data as part of a Marketing Authorization Application (MAA) with the EMA.European Medicines Agency (EMA). After the EMA evaluates the MAA, it provides a recommendation to the EC and the EC then approves or denies the MAA. It is also possible for new chemical products to obtain marketing authorization in the EU through a “mutual recognition procedure” in which an application is made to a single member state and, if the member state approves the pharmaceutical product under a national procedure, the applicant may submit that approval to the mutual recognition procedure of some or all other member states.
Outside of the United States and the EU, the Company submits marketing applications to national regulatory authorities. Examples of such are the Pharmaceuticals and Medical Devices Agency in Japan, Health Canada, Agência Nacional de Vigilância Sanatária in Brazil, Korea Food and Drug Administration in South Korea, Therapeutic Goods Administration in Australia and China Food and Drug Administration. Each country has a separate and independent review process and timeline. In many markets, approval times can be longer as the regulatory authority requires approval in a major market, such as the United States or the EU, and issuance of a Certificate of Pharmaceutical Product from that market before initiating their local review process.

Research and Development Update
The Company currently has several candidates under regulatory review in the United States.States and internationally.
Keytruda is an FDA-approvedapproved anti-PD-1 (programmed death receptor-1) therapy in clinical development for expanded indications in different cancer types.Keytruda is currently approved for the treatment of NSCLC, melanoma, advanced melanoma, and head and neck cancer.
In February 2017,2019, the FDA accepted and granted Priority Review for review twoa supplemental BLAs (sBLA)BLA for Keytruda in combination with Inlyta (axitinib), a tyrosine kinase inhibitor, for the first-line treatment of patients with advanced renal cell carcinoma. This supplemental BLA is based on findings from the Phase 3 KEYNOTE-426 trial, which demonstrated that Keytruda in combination with axitinib, as compared to sunitinib, significantly improved overall survival (OS) and progression-free survival (PFS) in the first-line treatment of advanced renal cell carcinoma. These data were presented at the American Society for Clinical Oncology (ASCO) Genitourinary Cancers Symposium in

February 2019. The supplemental BLA also included supporting data from the Phase 1b KEYNOTE-035 trial. The FDA set a PDUFA date of June 20, 2019. Merck has filed data from KEYNOTE-426 with regulatory authorities worldwide.
In February 2019, the Committee for Medicinal Products for Human Use of the EMA adopted a positive opinion recommending Keytruda, in combination with carboplatin and either paclitaxel or nab-paclitaxel, for the first-line treatment of metastatic squamous NSCLC in adults. This recommendation is based on results from the pivotal Phase 3 KEYNOTE-407 trial, which enrolled patients regardless of PD-L1 tumor expression status. The trial showed a significant improvement in OS and PFS for patients taking Keytruda in combination with chemotherapy (carboplatin and either paclitaxel or nab-paclitaxel) compared with chemotherapy alone. If approved, this would mark the first approval in Europe for an anti-PD-1 therapy in combination with chemotherapy for adults with metastatic squamous NSCLC. In October 2018, the FDA approved Keytruda in combination with carboplatin-paclitaxel or nab-paclitaxel as a first-line treatment for metastatic squamous NSCLC, regardless of PD-L1 expression.
In December 2018, the FDA extended the action date for the supplemental BLA seeking approval for Keytruda as monotherapy for the first-line treatment of locally advanced or metastatic urothelial cancer, including most bladder cancers.NSCLC in patients whose tumors express PD-L1 (TPS ≥1%) without EGFR or ALK genomic tumor aberrations. The application for first-line use wassupplemental BLA is based on results of the Phase 3 KEYNOTE-042 trial where Keytruda monotherapy demonstrated a significant improvement in OS compared with chemotherapy in this patient population. The Company submitted additional data and analyses to the FDA, which constituted a major amendment and extended the PDUFA date by three months to April 11, 2019. Merck continues to work closely with the FDA during the review of this supplemental BLA.
In February 2019, the FDA accepted and granted Priority Review for the treatment of these patients who are ineligiblea supplemental BLA for cisplatin-containing therapy. The application for second-line use was granted Priority Review for these patients with disease progression on or after platinum-containing chemotherapy. The PDUFA action date for both applications is June 14, 2017. The FDA previously granted Breakthrough Therapy designation to Keytruda as monotherapy for the second-line treatment of patients with locally advanced small-cell lung cancer (SCLC) whose disease has progressed after two or more lines of prior therapy. This supplemental BLA, which is seeking accelerated approval for this new indication, is based on data from the SCLC cohorts of the Phase 2 KEYNOTE-158 and Phase 1b KEYNOTE-028 trials. The FDA set a PDUFA date of June 17, 2019. Keytruda is also being studied in combination with chemotherapy in the ongoing Phase 3 KEYNOTE-604 study in patients with newly diagnosed extensive stage SCLC.
In February 2019, the FDA accepted a supplemental BLA for Keytruda as monotherapy or in combination with platinum and 5-fluorouracil chemotherapy for the first-line treatment of patients with recurrent or metastatic urothelial cancerHNSCC. This supplemental BLA is based in part on data from the pivotal Phase 3 KEYNOTE-048 trial where Keytruda demonstrated a significant improvement in OS compared with the standard of care, as monotherapy in patients whose tumors expressed PD-L1 with Combined Positive Score (CPS)≥20 and CPS≥1 and in combination with chemotherapy in the total patient population. These data were presented at the European Society for Medical Oncology (ESMO) 2018 Congress. The FDA granted Priority Review to the supplemental BLA and set a PDUFA date of June 10, 2019. KEYNOTE-048 also serves as the confirmatory trial for KEYNOTE-012, a Phase 1b study which supported the previous accelerated approval for Keytruda as monotherapy for the treatment of patients with recurrent or metastatic HNSCC with disease progression on or after platinum-containing chemotherapy.
In January 2017,November 2018, Merck announced that the FDA accepted for review an sBLA forPhase 3 KEYNOTE-181 trial investigating Keytruda plus chemotherapy (pemetrexed plus carboplatin) foras monotherapy in the first-linesecond-line treatment of advanced or metastatic esophageal or esophagogastric junction carcinoma met a primary endpoint of OS in patients with metastatic or advanced non-squamous NSCLC regardless ofwhose tumors expressed PD-L1 expression and(CPS ≥10). In this pivotal study, treatment with no EGFR or ALK genomic tumor aberrations. This is the first application for regulatory approval of Keytruda resulted in combination with another treatment. The FDA granted Priority Review with a PDUFA action date of May 10, 2017. The sBLA will be reviewed under the FDA’s Accelerated Approval program.
In December 2016, the FDA accepted for review an sBLA for Keytruda for the treatment ofstatistically significant improvement in OS compared to chemotherapy (paclitaxel, docetaxel or irinotecan) in patients with refractory classical Hodgkin lymphoma or for patients who have relapsed after three or more prior linesCPS ≥10, regardless of therapy.histology. The FDA granted Priority Review with a PDUFA action dateprimary endpoint of March 15, 2017. The sBLA will be reviewed under the FDA’s Accelerated Approval program.
In November 2016, the FDA accepted for review an sBLA for Keytruda, for the treatment of previously treatedOS was also evaluated in patients with advanced microsatellite instability-high (MSI-H) cancer. The FDA granted Priority Review with a PDUFA action datesquamous cell histology and in the entire intention-to-treat study population. While directionally favorable, statistical significance for OS was not met in these two patient groups. Per the statistical analysis plan, the key secondary endpoints of March 8, 2017. The sBLA will be reviewed underPFS and objective response rate (ORR) were not formally tested, as OS was not reached in the FDA’s Accelerated Approval program. The FDA recently granted Breakthrough Therapy designation to Keytrudafull intention-to-treat study population. These results were presented in January 2019 at the ASCO Gastrointestinal Cancers Symposium and have been submitted for unresectable or metastatic MSI-H non-colorectal cancer, and previously granted it for the treatment of patients with unresectable or metastatic MSI-H colorectal cancer.regulatory review.
Additionally, Keytruda has also received Breakthrough Therapy designation from the FDA for the treatment of high-risk early-stage triple-negative breast cancer in combination with neoadjuvant chemotherapy. The FDA’s Breakthrough Therapy designation is intended to expedite the development and review of a candidate that is planned for use, alone or in combination, to treat a serious or life-threatening disease or condition when preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints.

In October 2018, Merck announced the first presentation of results from an interim analysis of KEYNOTE-057, a Phase 2 trial evaluating Keytruda for previously treated patients with high-risk non-muscle invasive bladder cancer. An interim analysis of the study’s primary mediastinal B-cell lymphomaendpoint showed a complete response rate of nearly 40% at three months with Keytruda in patients whose disease was unresponsive to Bacillus Calmette-Guérin therapy, the current standard of care for this disease, and who were ineligible for or who refused to undergo radical cystectomy. These results, as well as other study findings, were presented at the ESMO 2018 Congress.
In February 2019, Merck announced that is refractorythe pivotal Phase 3 KEYNOTE-240 trial evaluating Keytruda, plus best supportive care, for the treatment of patients with advanced hepatocellular carcinoma who were previously treated with systemic therapy, did not meet its co-primary endpoints of OS and PFS compared with placebo plus best supportive care. In the final analysis of the study, there was an improvement in OS for patients treated with Keytruda compared to placebo, however these OS results did not meet statistical significance per the pre-specified statistical plan. Results for PFS were also directionally favorable in the Keytruda arm compared with placebo but did not reach statistical significance. The key secondary endpoint of ORR was not formally tested, since superiority was not reached for OS or has relapsed after two prior lines of therapy.PFS. Results will be presented at an upcoming medical meeting and have been shared with the FDA for discussion.
The Keytruda clinical development program consists of more than 400900 clinical trials, including more than 200600 trials that combine Keytruda with other cancer treatments. These studies encompass more than 30 cancer types including: bladder, cervical, colorectal, esophageal, gastric, head and neck, hepatocellular, Hodgkin lymphoma, non-Hodgkin lymphoma, melanoma, multiple myeloma,mesothelioma, nasopharyngeal, NSCLC, ovarian, PMBCL, prostate, renal, small-cell lung and triple-negative breast, many of which are currently in Phase 3 clinical development. Further trials are being planned for other cancers.
MK-1293Lynparza, is an investigational follow-on biologic insulin glargine candidateoral PARP inhibitor currently approved for certain types of ovarian and breast cancer. In July 2017, Merck and AstraZeneca entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza for multiple cancer types.
In April 2018, Merck and AstraZeneca announced that the treatment ofEMA validated for review the MAA for Lynparza for use in patients with type 1 and type 2 diabetesdeleterious or suspected deleterious BRCA-mutated, HER2-negative metastatic breast cancer who have been previously treated with chemotherapy in the neoadjuvant, adjuvant or metastatic setting. This was the first regulatory submission for a PARP inhibitor in breast cancer in Europe.
Lynparza tablets are also under review by the FDA. MK-1293 was approved in the EU as a maintenance treatment in January 2017. MK-1293 is being developedpatients with newly-diagnosed, BRCA-mutated advanced ovarian cancer who were in collaborationcomplete or partial response following first-line standard platinum-based chemotherapy. This submission was based on positive results from the pivotal Phase 3 SOLO-1 trial. The trial showed a statistically-significant and clinically-meaningful improvement in PFS for Lynparza compared to placebo, reducing the risk of disease progression or death by 70% in patients with and partially funded by Samsung Bioepis.newly-diagnosed, BRCA-mutated advanced ovarian cancer who were in complete or partial response to platinum-based chemotherapy.
V419 is an investigational pediatric hexavalent combination vaccine, DTaP5-IPV-Hib-HepB, under review with the FDA that is being developed and, if approved, will be commercialized through a partnership betweenIn December 2018, Merck and Sanofi. This vaccine is designed to help protect against six important diseases - diphtheria, tetanus, pertussis (whooping cough), polio (poliovirus types 1, 2, and 3), invasive disease caused by Haemophilus influenzae type b (Hib), and hepatitis B. On November 2, 2015,AstraZeneca announced positive results from the FDA issuedrandomized, open-label, controlled, Phase 3 SOLO-3 trial of Lynparza tablets in patients with relapsed ovarian cancer after two or more lines of treatment. The trial was conducted as a CRL with respect to the BLA for V419. Both companies are reviewing the CRL and plan to have further communicationpost-approval commitment in agreement with the FDA. In February 2016, the EC granted marketing authorization for V419 for prophylaxis against diphtheria, tetanus, pertussis, hepatitis B, poliomyelitis, and invasive disease caused by Hib, in infants and toddlersResults from the agetrial showed BRCA-mutated advanced ovarian cancer patients treated with Lynparza following two or more prior lines of 6 weeks. V419 is being marketed as Vaxelischemotherapy demonstrated a statistically significant and clinically meaningful improvement in the EU.
In additionprimary endpoint of ORR and the key secondary endpoint of PFS compared to chemotherapy. Merck and AstraZeneca plan to discuss these results with the candidates under regulatory review, the Company has several drug candidates in Phase 3 clinical development in addition to the FDA.Keytruda programs discussed above.

MK-8931, verubecestat, is an investigational small molecule inhibitor of the beta-site amyloid precursor protein cleaving enzyme 1 (BACE1) for the treatment of Alzheimer’s disease. In February 2017, Merck announced that its external Data Monitoring Committee (eDMC) recommended termination of the Phase 2/3 EPOCH study of verubecestat in mild-to-moderate Alzheimer’s disease based on the low probability of success of this study. The same eDMC recommended that a separate Phase 3 study, APECS, evaluating verubecestat for amnestic mild cognitive impairment due to Alzheimer’s disease, also known as prodromal Alzheimer’s disease, continue as planned. Estimated primary completion date for the APECS study, which is fully enrolled, is February 2019.
MK-0859, anacetrapib, is an investigational inhibitor of the cholesteryl ester transfer protein (CETP) in development for raising HDL-C and reducing LDL-C. Anacetrapib is being evaluated in a 30,000 patient, event-driven cardiovascular clinical outcomes trial sponsored by Oxford University, REVEAL (Randomized EValuation of the Effects of Anacetrapib Through Lipid-modification), involving patients with preexisting vascular disease. In November 2015, Merck announced that the Data Monitoring Committee (DMC) of the REVEAL outcomes study completed its planned review of unblinded study data and recommended the study continue with no changes. The DMC reviewed safety and efficacy data from the study, which included an assessment of futility. Merck remains blinded to the actual results of this analysis and to other REVEAL safety and efficacy data. Under the study, the last patient’s last visit occurred in January 2017. The Company anticipates receiving the top-line results from the study mid-year 2017.
MK-7655A is a combination of relebactam, an investigational beta-lactamase inhibitor, and imipenem/cilastatin (an approved carbapenem antibiotic). In February 2019, Merck announced that the FDA accepted for Priority Review an NDA for MK-7655A for the treatment of complicated urinary tract infections and complicated intra-abdominal infections caused by certain susceptible Gram-negative bacteria in adults with limited or no alternative therapies available. The PDUFA date is July 16, 2019. In April 2018, Merck announced that a pivotal Phase 3 study of MK-7655A demonstrated a favorable overall response in the treatment of certain imipenem-non-susceptible bacterial infections, the primary endpoint, with lower treatment-emergent nephrotoxicity (kidney toxicity), a secondary endpoint, compared to a colistin (colistimethate sodium) plus imipenem/cilastatin regimen. The FDA hashad previously designated this combination a QIDPQualified Infectious Disease Product with designated Fast Track status for the treatment of hospital-acquiredhospital-

acquired bacterial pneumonia, ventilator-associated bacterial pneumonia, complicated intra-abdominal infections and complicated urinary tract infections.
MK-8228, letermovir,V920 (rVSV∆G-ZEBOV-GP, live attenuated), is an investigational oral once-daily or an intravenous infusion antiviral candidate for the prevention of clinically-significant cytomegalovirus (CMV) infection. Letermovir has received Orphan Drug Status in the EU and in the United States, where it has also been granted Fast Track designation. In October 2016, Merck announced that the pivotal Phase 3 clinical study of letermovir met its primary endpoint. The global, multicenter, randomized, placebo-controlled study evaluated the efficacy and safety of letermovir in adult (18 years and older) CMV-seropositive recipients of an allogeneic hematopoietic stem cell transplant. Merck plans to submit regulatory applications for the approval of letermovir in the United States and EU in 2017.
MK-8835, ertugliflozin, is an investigational oral SGLT2 inhibitor being evaluated for the treatment of type 2 diabetes in collaboration with Pfizer Inc. (Pfizer). In September 2016, Merck and Pfizer announced that a Phase 3 study (VERTIS SITA2) of ertugliflozin met its primary endpoint. Both 5 mg and 15 mg daily doses of ertugliflozin showed significantly greater reductions in A1C (an average measure of blood glucose over the past two to three months) when added to patients on a background of sitagliptin and metformin. Ertugliflozin is also being studied in combination with Januvia (sitagliptin) and metformin. In December 2016, Merck submitted NDAs to the FDA for ertugliflozin and the two fixed-dose combinations: MK-8835A, ertugliflozin plus Januvia, and MK-8835B, ertugliflozin plus metformin. The Company anticipates a response from the FDA in the first quarter of 2017. Ertugliflozin and the two fixed-dose combinations are currently under review in the EU.
MK-0431J is an investigational fixed-dose combination of sitagliptin and ipragliflozin under development for commercialization in Japan in collaboration with Astellas Pharma Inc. (Astellas). Ipragliflozin, an SGLT2 inhibitor, co-developed by Astellas and Kotobuki Pharmaceutical Co., Ltd. (Kotobuki), is approved for use in Japan and is being co-promoted with Merck and Kotobuki.
V920 is an investigational rVSV-ZEBOV (Ebola)Ebola Zaire disease vaccine candidate being studied in large scale Phase 2/3 clinical trials. In November 2014, Merck and NewLink Genetics announced an exclusive licensing and collaboration agreement for the investigational Ebola vaccine. In December 2015, Merck announced that the application for Emergency Use Assessment and Listing (EUAL) for V920 was accepted for review by the World Health Organization (WHO). According to the WHO, the EUAL process is designed to expedite the availability of vaccines needed for public health emergencies such as another outbreak of Ebola. The WHO decision to grant V920 EUAL status will be based on data regarding quality, safety, and efficacy/effectiveness; as well as a risk/benefit analysis for emergency use. While EUAL designation allows for emergency use, the vaccine remains investigational and has not yet been licensed for commercial distribution. In July 2016, Merck announced that the FDA granted V920 Breakthrough Therapy designation, and that the EMA granted the vaccine candidate PRIME (PRIority MEdicines) status. In December 2016, endNovember 2018, Merck announced that it has started the submission of study results froma rolling BLA to the WHO ring vaccination trial were reportedFDA for V920. This rolling submission was made pursuant to the FDA’s Breakthrough Therapy designation. Merck expects the rolling submission of the BLA to be completed in Lancet supporting2019. The Company also intends to file V920 with the July 2015 interim assessmentEMA in 2019.
In February 2019, Merck announced that

V920 offers substantial protection against Ebola virus disease, the FDA accepted for Priority Review a supplemental NDA for Zerbaxa to treat adult patients with no reported cases among vaccinated individuals from 10 days after vaccination in both randomized and non-randomized clusters. Results from other ongoing studies are anticipatednosocomial pneumonia, including ventilator-associated pneumonia, caused by certain susceptible Gram-negative microorganisms. The PDUFA date is June 3, 2019. Zerbaxa is also under review for this indication by the EMA. Zerbaxa is currently approved in the second halfUnited States for the treatment of 2017.adult patients with complicated urinary tract infections caused by certain susceptible Gram-negative microorganisms, and is also indicated, in combination with metronidazole, for the treatment of adult patients with complicated intra-abdominal infections caused by certain susceptible Gram-negative and Gram-positive microorganisms.
In addition to the candidates under regulatory review, the Company has several drug candidates in Phase 3 clinical development in addition to the Keytruda programs discussed above.
MK-7264, gefapixant, is a selective, non-narcotic, orally-administered P2X3-receptor agonist being investigated in Phase 3 trials for the treatment of refractory, chronic cough and in a Phase 2 trial for the treatment of women with endometriosis-related pain.
Lenvima, is an orally available tyrosine kinase inhibitor currently approved for certain types of thyroid cancer, hepatocellular carcinoma, and in combination for certain patients with renal cell carcinoma. In March 2018, Merck and Eisai entered into a strategic collaboration for the worldwide co-development and co-commercialization of Lenvima. Under the agreement, Merck and Eisai will develop and commercialize Lenvima jointly, both as monotherapy and in combination with Keytruda. Per the agreement, the companies will jointly initiate clinical studies evaluating the Keytruda/Lenvima combination to support 11 potential indications in six types of cancer (endometrial cancer, NSCLC, hepatocellular carcinoma, head and neck cancer, bladder cancer and melanoma), as well as a basket trial targeting multiple cancer types. The FDA granted Breakthrough Therapy designation for Keytruda in combination with Lenvima for the potential treatment of patients with advanced and/or metastatic renal cell carcinoma and for the potential treatment of certain patients with advanced and/or metastatic non-microsatellite instability high/proficient mismatch repair endometrial carcinoma.
MK-1242, vericiguat, is an investigational treatment for heart failure being studied in a Phase 3 clinical trial in patients suffering from chronic heart failure.failure with reduced ejection fracture (Phase 3 clinical trial) and from chronic heart failure with preserved ejection fracture (Phase 2 clinical trial). The development of vericiguat is part of a worldwide strategic collaboration between Merck and Bayer AG.Bayer.
V212V114 is an inactivated varicella zoster virus (VZV)investigational polyvalent conjugate vaccine in development for the prevention of herpes zoster. The Company completedpneumococcal disease. In June 2018, Merck initiated the Phase 3 trial in autologous hematopoietic cell transplant patients and is conducting another Phase 3 trial in patients with solid tumor malignancies undergoing chemotherapy and hematological malignancies. The study in autologous hematopoietic cell transplant patients met its primary endpoints and Merck presented the results from this study at the American Society for Blood and Marrow Transplantation Meetings in February 2017.
MK-1439, doravirine, is an investigational non-nucleoside reverse transcriptase inhibitor being developed by Merck for the treatment of HIV-1 infection. In February 2017, the Company received positive results from a first Phase 3 study showing that doravirine was non-inferior to an alternative regimen in achievingthe adult population for the prevention of invasive pneumococcal disease. Currently five Phase 3 adult studies are ongoing, including studies in healthy adults 50 years of age or older, adults with risk factors for pneumococcal disease, those infected with HIV, and maintaining HIV-1 suppressionthose who are recipients of allogeneic hematopoietic stem cell transplant. In October 2018, Merck began the first Phase 3 study in infected adults during 48 weeks of treatment.
the pediatric population. Currently, three studies are ongoing, including studies in healthy infants and in children afflicted with sickle cell disease. In 2016, the Company also divested or discontinued certain drug candidates.
January 2019, Merck announced that itV114 received Breakthrough Therapy designation from the FDA for the prevention of invasive pneumococcal disease caused by the vaccine serotypes in pediatric patients 6 weeks to 18 years of age.

As a result of changes in the herpes zoster vaccine environment, Merck is discontinuing theending development of odanacatib, anV212, its investigational cathepsin K inhibitorvaccine for osteoporosis, and will not seek regulatory approval for its use. Merck previously reported a numeric imbalancethe prevention of shingles in adjudicated stroke events in the pivotal Phase 3 fracture outcomes study in postmenopausal women. The Company has decided to discontinue development after an independent adjudication and analysis of major adverse cardiovascular events confirmed an increased risk of stroke.immunocompromised patients.
The Company determined that, for business reasons, it would terminate the North America partnership agreement with ALK-Abelló that included MK-8237, an investigational allergy immunotherapy tablet for house dust mite allergy. Merck has given ALK-Abelló six months’ notice that it is terminating the agreement and therefore this compound will be returned to ALK-Abelló. This decision was not due to efficacy or safety concerns.
The Company also decided, for business reasons, to discontinue the clinical development of MK-8342B, referred to as the Next Generation Ring, an investigational combination (etonogestrel and 17ß-estradiol) vaginal ring for contraception and the treatment of dysmenorrhea in women seeking contraception. This decision was not due to efficacy or safety concerns.
Merck announced that, for business reasons, it will not proceed with submitting marketing applications for omarigliptin, an investigational, once-weekly DPP-4 inhibitor, in the United States or Europe. This decision did not result from concerns about the efficacy or safety of omarigliptin.

The chart below reflects the Company’s research pipeline as of February 24, 2017.22, 2019. Candidates shown in Phase 3 include specific products and the date such candidate entered into Phase 3 development. Candidates shown in Phase 2 include the most advanced compound with a specific mechanism or, if listed compounds have the same mechanism, they are each currently intended for commercialization in a given therapeutic area. Small molecules and biologics are given MK-number designations and vaccine candidates are given V-number designations. Except as otherwise noted, candidates in Phase 1, additional indications in the same therapeutic area (other than with respect to Keytruda)cancer and certain other indications) and additional claims, line extensions or formulations for in-line products are not shown.
Phase 2Phase 3 (Phase 3 entry date)Entry Date)Under Review
Asthma
MK-1029
Cancer
CancerNew Molecular Entities/Vaccines
MK-3475 Keytruda
PMBCL (Primary Mediastinal
Large B-Cell Lymphoma)
Advanced Solid Tumors
Nasopharyngeal
Ovarian
Prostate
MK-2206
Cough, including cough with IPF
MK-7264
Diabetes Mellitus
MK-8521
Hepatitis C
MK-3682B (MK-3682 (uprifosbuvir)/MK-5172 (grazoprevir)/MK-8408 (ruzasvir))
Pneumoconjugate Vaccine
V114
Alzheimer’s Disease
MK-8931 (verubecestat) (December 2013)
Atherosclerosis
MK-0859 (anacetrapib) (May 2008)
Bacterial Infection
MK-7655A (relebactam+imipenem/cilastatin)
(October 2015)
Cancer
MK-3475 Keytruda
Bladder (October 2014) (EU)
Bacterial Infection
Advanced Solid TumorsBreast (October 2015)
MK-7655A relebactam+imipenem/cilastatin
Cutaneous Squamous Cell CarcinomaCervical (October 2018) (EU)(U.S.)
ProstateColorectal (November 2015)
Esophageal (December 2015)
Gastric (May 2015)
Head and Neck (November 2014) (EU)
Hepatocellular (May 2016)
Hodgkin Lymphoma (July 2016) (EU)
Multiple Myeloma (December 2015)
Renal (October 2016)
CMV Prophylaxis in Transplant Patients
MK-8228 (letermovir) (June 2014)
Diabetes Mellitus
MK-8835 (ertugliflozin) (November 2013)
Ebola Vaccine
(U.S.)MK-7902 Lenvima(1)
MK-8835A (ertugliflozin+sitagliptin)
Esophageal (December 2015)
(September 2015)V920(4) (U.S.)
Biliary TractGastric (May 2015) (EU)
Non-Small-Cell LungHepatocellular (May 2016) (EU)Certain Supplemental Filings
(V937 Cavatak
Mesothelioma (May 2018)Cancer
MelanomaNasopharyngeal (April 2016)
MK-3475 Keytruda
MK-7690Ovarian (December 2018)
    First-Line Advanced Renal Cell Carcinoma
Colorectal1)(2)
MK-8835B (ertugliflozin+metformin)
Renal (October 2016) (EU)(KEYNOTE-426) (U.S.)
(August 2015) (U.S.)MK-7339 Lynparza(1)
MK-0431J (sitagliptin+ipragliflozin)
Small-Cell Lung (May 2017) (EU)
(October 2015) (Japan)First-Line Metastatic Squamous Non-Small-
Advanced Solid Tumors
MK-7902 Lenvima(1,2)
Cell Lung Cancer (KEYNOTE-407) (EU)
Cytomegalovirus VaccineEndometrial (June 2018)
First-Line Metastatic Non-Small-Cell Lung
V160
MK-7339 Lynparza(1)
Cancer (KEYNOTE-042) (U.S.) (EU)
Diabetes MellitusPancreatic (December 2014)
Ebola Vaccine    Third-Line Advanced Small-Cell Lung
V920MK-8521(3)
Prostate (April 2017)Cancer (KEYNOTE-158) (U.S.)
HIV-1 InfectionCough
First-Line Head and Neck Cancer
MK-8591MK-7264 (gefapixant) (March 2015)
2018)
(KEYNOTE-048) (U.S.)
Pediatric Neurofibromatosis Type-1Heart Failure
    Alternative Dosing Regimen
MK-5618 (selumetinib)(1)
MK-1242 (vericiguat) (September 2016)(1)
Herpes Zoster
V212 (inactivated VZV vaccine) (December 2010)
HIV
MK-1439 (doravirine) (December 2014)

(Q6W) (EU)
Respiratory Syncytial VirusPneumoconjugate Vaccine
New Molecular Entities/Vaccines
Allergy
MK-8237, House Dust Mite (U.S.)(2)
Diabetes Mellitus
MK-1293 (U.S.)MK-7339 Lynparza(1)
MK-1654V114 (June 2018)
MK-8835 (ertugliflozin)Second-Line Metastatic Breast Cancer (EU)(1)
MK-8835A (ertugliflozin+sitagliptin) (EU)(1)
MK-8835B (ertugliflozin+metformin) (EU)(1)
Pediatric Hexavalent Combination Vaccine
V419 (U.S.)(3)


Certain Supplemental Filings
Cancer
Keytruda
• Previously Treated Microsatellite Instability-High Cancer (U.S.)
• Relapsed or Refractory Classical Hodgkin Lymphoma (U.S.)
• Combination with Chemotherapy in first-line non-squamous Non-Small-Cell Lung Cancer (U.S.)
• First Line Cis-ineligible Bladder Cancer (U.S.)
• Second Line Metastatic Bladder Cancer (U.S.)

Schizophrenia
First-Line Advanced Ovarian Cancer (EU)
MK-8189
HABP/VABP(5)
MK-7625A Zerbaxa (U.S.)
Footnotes:
(1)    Being developed in a collaboration.
(2) MK-8237 was beingBeing developed as part of a North America partnershipin combination with ALK-Abelló. Merck has given ALK-Abelló six months’ notice that it is terminating the agreement and, therefore, this compound will be returned to ALK-Abelló.
Keytruda.
(3)V419    Development is an investigational pediatric hexavalent combination vaccine, DTaP5-IPV-Hib-HepB, that is being developed and, if approved, will be commercialized through a partnership of Merck and Sanofi. On November 2, 2015, the FDA issued a CRL with respect to V419. Both companies are reviewing the CRL and plan to have further communication with the FDA.currently on hold.
(4)    Rolling submission.
(5)    HABP - Hospital-Acquired Bacterial
Pneumonia / VABP - Ventilator-Associated
Bacterial Pneumonia

Employees
As of December 31, 2016,2018, the Company had approximately 68,00069,000 employees worldwide, with approximately 26,50025,400 employed in the United States, including Puerto Rico. Approximately 29%30% of worldwide employees of the Company are represented by various collective bargaining groups.
Restructuring Activities
The Company incurs substantial costs for restructuring program activities related to Merck’s productivity and cost reduction initiatives, as well as in connection with the integration of certain acquired businesses. In 2010 and 2013, the Company commenced actions under global restructuring programs designed to streamline its cost structure. The actions under these programs include the elimination of positions in sales, administrative and headquarters organizations, as well as the sale or closure of certain manufacturing and research and

development sites and the consolidation of office facilities. The Company also continues to reduce its global real estate footprint and improve the efficiency of its manufacturing and supply network. The non-facility related restructuring actions under these programs are substantially complete; the remaining activities primarily relate to ongoing facility rationalizations. Since inception of the programs through December 31, 2016,2018, Merck has eliminated approximately 40,90045,510 positions comprised of

employee separations, as well as the elimination of contractors and vacant positions. The Company expects tohas substantially completecompleted the remaining actions under these programs by the end of 2017.programs.
Environmental Matters
The Company believes that there are no compliance issues associated with applicable environmental laws and regulations that would have a material adverse effect on the Company. The Company is also remediating environmental contamination resulting from past industrial activity at certain of its sites. Expenditures for remediation and environmental liabilities were $11$16 million in 2016,2018, and are estimated at $44$57 million in the aggregate for the years 20172019 through 2021.2023. These amounts do not consider potential recoveries from other parties. The Company has taken an active role in identifying and accruing for these costs and, in management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have been accrued and totaled $83$71 million and $109$82 million at December 31, 20162018 and 2015,2017, respectively. Although it is not possible to predict with certainty the outcome of these matters, or the ultimate costs of remediation, management does not believe that any reasonably possible expenditures that may be incurred in excess of the liabilities accrued should exceed $64$60 million in the aggregate. Management also does not believe that these expenditures should have a material adverse effect on the Company’s financial position, results of operations, liquidity or capital resources for any year.
Merck believes that climate change could present risks to its business. Some of the potential impacts of climate change to its business include increased operating costs due to additional regulatory requirements, physical risks to the Company’s facilities, water limitations and disruptions to its supply chain. These potential risks are integrated into the Company’s business planning including investment in reducing energy, water use and greenhouse gas emissions. The Company does not believe these risks are material to its business at this time.
Geographic Area Information
The Company’s operations outside the United States are conducted primarily through subsidiaries. Sales worldwide by subsidiaries outside the United States as a percentage of total Company sales were 57% of sales in 2018, 57% of sales in 2017 and 54% of sales in 2016, 56% of sales in 2015 and 60% of sales in 2014.2016.
The Company’s worldwide business is subject to risks of currency fluctuations, governmental actions and other governmental proceedings abroad. The Company does not regard these risks as a deterrent to further expansion of its operations abroad. However, the Company closely reviews its methods of operations and adopts strategies responsive to changing economic and political conditions.
Merck has operations in countries located in Latin America, the Middle East, Africa, Eastern Europe and Asia Pacific. Business in these developing areas, while sometimes less stable, offers important opportunities for growth over time.
Financial information about geographic areas of the Company’s business is provided in Item 8. “Financial Statements and Supplementary Data” below.
Available Information
The Company’s Internet website address is www.merck.com. The Company will make available, free of charge at the “Investors” portion of its website, its Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and all amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, as soon as reasonably practicable after such reports are electronically filed with, or furnished to, the U.S. Securities and Exchange Commission (SEC). The address of that website is http://www.sec.gov. In addition, the Company will provide without charge a copy of its Annual Report on Form 10-K, including financial statements and schedules, upon the written request of any shareholder to Merck Shareholder Services,the Office of the Secretary, Merck & Co., Inc., 2000 Galloping Hill Road, K1-3049,K1-4157, Kenilworth, NJ 07033 U.S.A.
The Company’s corporate governance guidelines and the charters of the Board of Directors’ four standing committees are available on the Company’s website at www.merck.com/about/leadership and all such information is available in print to any stockholdershareholder who requests it from the Company.

Item 1A.Risk Factors.
Investors should carefully consider all of the information set forth in this Form 10-K, including the following risk factors, before deciding to invest in any of the Company’s securities. The risks below are not the only ones the Company faces. Additional risks not currently known to the Company or that the Company presently deems immaterial may also impair its business operations. The Company’s business, financial condition, results of operations or prospects could be materially adversely affected by any of these risks. This Form 10-K also contains forward-looking statements that involve risks and uncertainties. The Company’s results could materially differ from those anticipated in these forward-looking statements as a result of certain factors, including the risks it faces described below and elsewhere. See “Cautionary Factors that May Affect Future Results” below.
The Company is dependent on its patent rights, and if its patent rights are invalidated or circumvented, its business would be adversely affected.
Patent protection is considered, in the aggregate, to be of material importance to the Company’s marketing of human health and animal health products in the United States and in most major foreign markets. Patents covering products that it has introduced normally provide market exclusivity, which is important for the successful marketing and sale of its products. The Company seeks patents covering each of its products in each of the markets where it intends to sell the products and where meaningful patent protection is available.
Even if the Company succeeds in obtaining patents covering its products, third parties or government authorities may challenge or seek to invalidate or circumvent its patents and patent applications. It is important for the Company’s business to defend successfully the patent rights that provide market exclusivity for its products. The Company is often involved in patent disputes relating to challenges to its patents or claims by third parties of infringement against the Company. The Company defends its patents both within and outside the United States, including by filing claims of infringement against other parties. See Item 8. “Financial Statements and Supplementary Data,” Note 10.11. “Contingencies and Environmental Liabilities” below. In particular, manufacturers of generic pharmaceutical products from time to time file Abbreviatedabbreviated NDAs with the FDA seeking to market generic forms of the Company’s products prior to the expiration of relevant patents owned or licensed by the Company. The Company normally responds by defending its patent, including by filing lawsuits alleging patent infringement. Patent litigation and other challenges to the Company’s patents are costly and unpredictable and may deprive the Company of market exclusivity for a patented product or, in some cases, third-party patents may prevent the Company from marketing and selling a product in a particular geographic area.
Additionally, certain foreign governments have indicated that compulsory licenses to patents may be granted in the case of national emergencies or in other circumstances, which could diminish or eliminate sales and profits from those regions and negatively affect the Company’s results of operations. Further, court decisions relating to other companies’ patents, potential legislation relating to patents, as well as regulatory initiatives may result in a more general weakening of intellectual property protection.
If one or more important products lose patent protection in profitable markets, sales of those products are likely to decline significantly as a result of generic versions of those products becoming available and, in the case of certain products, such a loss could result in a material non-cash impairment charge.available. The Company’s results of operations may be adversely affected by the lost sales unless and until the Company has successfully launched commercially successful replacement products. In addition, if products that were measured at fair value and capitalized in connection with acquisitions experience difficulties in the market that negatively affect product cash flows, the Company may recognize material non-cash impairment charges with respect to the value of those products.
A chart listing the patent protection for certain of the Company’s marketed products, and U.S. patent protection for candidates under review and in Phase 3 candidatesclinical development is set forth above in Item 1. “Business — Patents, Trademarks and Licenses.”
As the Company’s products lose market exclusivity, the Company generally experiences a significant and rapid loss of sales from those products.
The Company depends upon patents to provide it with exclusive marketing rights for its products for some period of time. Loss of patent protection for one of the Company’s products typically leads to a significant and rapid loss of sales for that product as lower priced generic versions of that drug become available. In the case of products that contribute significantly to the Company’s sales, the loss of market exclusivity can have a material adverse effect

on the Company’s business, cash flow, results of operations, financial position and prospects. For example, pursuant

to an agreement with a generic manufacturer, that manufacturer launched in the United States a generic version of Zetia in December 2016. In addition, the Company will loselost U.S. patent protection for Vytorin in April 2017. TheAs a result, the Company expectsexperienced a significant and rapid loss of sales of Zetia and Vytorin in the United States in 2017.2017, which continued in 2018. Furthermore, the patents that provide U.S. and EU market exclusivity for Noxafil will expire in July 2019 and December 2019, respectively, and the Company anticipates a significant decline in U.S. and EU Noxafil sales thereafter.
Key products generate a significant amount of the Company’s profits and cash flows, and any events that adversely affect the markets for its leading products could have a material and negative impact on results of operations and cash flows.
The Company’s ability to generate profits and operating cash flow depends largely upon the continued profitability of the Company’s key products, such as Keytruda,Januvia, Janumet, Keytruda,Gardasil/Gardasil 9 Isentressand and ZepatierBridion. As a result of the Company’s dependence on key products, any event that adversely affects any of these products or the markets for any of these products could have a significant adverse impact on results of operations and cash flows. These events could include loss of patent protection, increased costs associated with manufacturing, generic or over-the-counter availability of the Company’s product or a competitive product, the discovery of previously unknown side effects, results of post-approval trials, increased competition from the introduction of new, more effective treatments and discontinuation or removal from the market of the product for any reason. Such events could have a material adverse effect on the sales of any such products.
For example, in 2018, sales of Zepatier were materially unfavorably affected by increasing competition and declining patient volumes. Sales of Zostavax were also materially unfavorably affected due to competition. The Company expects that competition will continue to adversely affect the sales of these products.
The Company’s research and development efforts may not succeed in developing commercially successful products and the Company may not be able to acquire commercially successful products in other ways; in consequence, the Company may not be able to replace sales of successful products that have lost patent protection.
Like other major pharmaceutical companies, in order to remain competitive, the Company must continue to launch new products each year.products. Expected declines in sales of products after the loss of market exclusivity mean that the Company’s future success is dependent on its pipeline of new products, including new products whichthat it may develop through collaborations and joint ventures and products whichthat it is able to obtain through license or acquisition. To accomplish this, the Company commits substantial effort, funds and other resources to research and development, both through its own dedicated resources and through various collaborations with third parties. There is a high rate of failure inherent in the research and development process for new drugs. As a result, there is a high risk that funds invested by the Company in research programs will not generate financial returns. This risk profile is compounded by the fact that this research has a long investment cycle. To bring a pharmaceutical compound from the discovery phase to market may take a decade or more and failure can occur at any point in the process, including later in the process after significant funds have been invested.
For a description of the research and development process, see Item 1. “Business — Research and Development” above. Each phase of testing is highly regulated and during each phase there is a substantial risk that the Company will encounter serious obstacles or will not achieve its goals, therefore, the Company may abandon a product in which it has invested substantial amounts of time and resources. Some of the risks encountered in the research and development process include the following: pre-clinical testing of a new compound may yield disappointing results; competing products from other manufacturers may reach the market first; clinical trials of a new drug may not be successful; a new drug may not be effective or may have harmful side effects; a new drug may not be approved by the regulators for its intended use; it may not be possible to obtain a patent for a new drug; payers may refuse to cover or reimburse the new product; or sales of a new product may be disappointing.
The Company cannot state with certainty when or whether any of its products now under development will be approved or launched; whether it will be able to develop, license or otherwise acquire compounds, product candidates or products; or whether any products, once launched, will be commercially successful. The Company must maintain a continuous flow of successful new products and successful new indications or brand extensions for existing products

sufficient both to cover its substantial research and development costs and to replace sales that are lost as profitable products lose market exclusivity or are displaced by competing products or therapies. Failure to do so in the short term or long term would have a material adverse effect on the Company’s business, results of operations, cash flow, financial position and prospects.

The Company’s success is dependent on the successful development and marketing of new products, which are subject to substantial risks.
Products that appear promising in development may fail to reach the market or fail to succeed for numerous reasons, including the following:
findings of ineffectiveness, superior safety or efficacy of competing products, or harmful side effects in clinical or pre-clinical testing;
failure to receive the necessary regulatory approvals, including delays in the approval of new products and new indications, or the anticipated labeling, and uncertainties about the time required to obtain regulatory approvals and the benefit/risk standards applied by regulatory agencies in determining whether to grant approvals;
failure in certain markets to obtain reimbursement commensurate with the level of innovation and clinical benefit presented by the product;
lack of economic feasibility due to manufacturing costs or other factors; and
preclusion from commercialization by the proprietary rights of others.
In the future, if certain pipeline programs are cancelled or if the Company believes that their commercial prospects have been reduced, the Company may recognize material non-cash impairment charges for those programs that were measured at fair value and capitalized in connection with acquisitions.acquisitions or certain collaborations.
Failure to successfully develop and market new products in the short term or long term would have a material adverse effect on the Company’s business, results of operations, cash flow, financial position and prospects.
The Company’s products, including products in development, cannot be marketed unless the Company obtains and maintains regulatory approval.
The Company’s activities, including research, preclinical testing, clinical trials and the manufacturing and marketing of its products, are subject to extensive regulation by numerous federal, state and local governmental authorities in the United States, including the FDA, and by foreign regulatory authorities, including in the EU.EU, Japan and China. In the United States, the FDA is of particular importance to the Company, as it administers requirements covering the testing, approval, safety, effectiveness, manufacturing, labeling and marketing of prescription pharmaceuticals. In many cases, the FDA requirements have increased the amount of time and money necessary to develop new products and bring them to market in the United States. Regulation outside the United States also is primarily focused on drug safety and effectiveness and, in many cases, reduction in the cost reduction.of drugs. The FDA and foreign regulatory authorities have substantial discretion to require additional testing, to delay or withhold registration and marketing approval and to otherwise preclude distribution and sale of a product.
Even if the Company is successful in developing new products, it will not be able to market any of those products unless and until it has obtained all required regulatory approvals in each jurisdiction where it proposes to market the new products. Once obtained, the Company must maintain approval as long as it plans to market its new products in each jurisdiction where approval is required. The Company’s failure to obtain approval, significant delays in the approval process, or its failure to maintain approval in any jurisdiction will prevent it from selling the new products in that jurisdiction until approval is obtained, if ever.jurisdiction. The Company would not be able to realize revenues for those new products in any jurisdiction where it does not have approval.
Developments following regulatory approval may adversely affect sales of the Company’s products.
Even after a product reaches the market, certain developments following regulatory approval including results in post-approval Phase 4 trials or other studies, may decrease demand for the Company’s products, including the following:
results in post-approval Phase 4 trials or other studies;

the re-review of products that are already marketed;
the recall or loss of marketing approval of products that are already marketed;


changing government standards or public expectations regarding safety, efficacy or labeling changes; and
greater scrutiny in advertising and promotion.
In the past several years, clinical trials and post-marketing surveillance of certain marketed drugs of the Company and of competitors within the industry have raised concerns that have led to recalls, withdrawals or adverse labeling of marketed products. Clinical trials and post-marketing surveillance of certain marketed drugs also have raised concerns among some prescribers and patients relating to the safety or efficacy of pharmaceutical products in general that have negatively affected the sales of such products. In addition, increased scrutiny of the outcomes of clinical trials has led to increased volatility in market reaction. Further, these matters often attract litigation and, even where the basis for the litigation is groundless, considerable resources may be needed to respond.
In addition, following in the wake of product withdrawals and other significant safety issues, health authorities such as the FDA, the EMA and Japan’s Pharmaceutical and Medical Device Agency have increased their focus on safety when assessing the benefit/risk balance of drugs. Some health authorities appear to have become more cautious when making decisions about approvability of new products or indications and are re-reviewing select products that are already marketed, adding further to the uncertainties in the regulatory processes. There is also greater regulatory scrutiny, especially in the United States, on advertising and promotion and, in particular, direct-to-consumer advertising.
If previously unknown side effects are discovered or if there is an increase in negative publicity regarding known side effects of any of the Company’s products, it could significantly reduce demand for the product or require the Company to take actions that could negatively affect sales, including removing the product from the market, restricting its distribution or applying for labeling changes. Further, in the current environment in which all pharmaceutical companies operate, the Company is at risk for product liability and consumer protection claims and civil and criminal governmental actions related to its products, research and/or marketing activities.
The Company faces intense competition from lower cost-genericcost generic products.
In general, the Company faces increasing competition from lower-cost generic products. The patent rights that protect its products are of varying strengths and durations. In addition, in some countries, patent protection is significantly weaker than in the United States or in the EU. In the United States and the EU, political pressure to reduce spending on prescription drugs has led to legislation and other measures which encouragesthat encourage the use of generic and biosimilar products. Although it is the Company’s policy to actively protect its patent rights, generic challenges to the Company’s products can arise at any time, and the Company’s patents may not prevent the emergence of generic competition for its products.
Loss of patent protection for a product typically is followed promptly by generic substitutes, reducing the Company’s sales of that product. Availability of generic substitutes for the Company’s drugs may adversely affect its results of operations and cash flow. In addition, proposals emerge from time to time in the United States and other countries for legislation to further encourage the early and rapid approval of generic drugs. Any such proposal that is enacted into law could worsen this substantial negative effect on the Company’s sales and, potentially, its business, cash flow, results of operations, financial position and prospects.
The Company faces intense competition from competitors’ products which, in addition to other factors, could in certain circumstances lead to non-cash impairment charges.products.
The Company’s products face intense competition from competitors’ products. This competition may increase as new products enter the market. In such an event, the competitors’ products may be safer or more effective, more convenient to use, have better insurance coverage or reimbursement levels or be more effectively marketed and sold than the Company’s products. Alternatively, in the case of generic competition, including the generic availability of competitors’ branded products, they may be equally safe and effective products that are sold at a substantially lower price than the Company’s products. As a result, if the Company fails to maintain its competitive position, this could have a material adverse effect on its business, cash flow, results of operations, financial position and prospects. In addition, if products that were measured at fair value and capitalized in connection with acquisitions experience

difficulties in the market that negatively impact product cash flows, the Company may recognize material non-cash impairment charges with respect to the value of those products.

The Company faces continued pricing pressure with respect to its products.
The Company faces increasingcontinued pricing pressure globally and, particularly in mature markets, from managed care organizations, government agencies and programs that could negatively affect the Company’s sales and profit margins. In the United States, these include (i) practices of managed care groups and institutional and governmental purchasers, (ii) U.S. federal laws and regulations related to Medicare and Medicaid, including the Medicare Prescription Drug Improvement and Modernization Act of 2003 and the ACA, and (iii) state activities aimed at increasing price transparency.transparency, including new laws as noted above in Item 1. “Competition and the Health Care Environment — Health Care Environment and Government Regulations.” Changes to the health care system enacted as part of health care reform in the United States, as well as increased purchasing power of entities that negotiate on behalf of Medicare, Medicaid, and private sector beneficiaries, could result in further pricing pressures. In addition, in the U.S., larger customers may, in the future, ask for and receive higher rebates on drugs in certain highly competitive categories. The Company must also compete to be placed on formularies of managed care organizations. Exclusion of a product from a formulary can lead to reduced usage in the managed care organization.
In order to provide information about the Company’s pricing practices, the Company recently postedannually posts on its website its first Pricing Action Transparency Report for the United States for the years 2010 - 2016.States. The report provides the Company’s average annual list price and net price increases across the Company’s U.S. portfolio dating back to 2010.  The report shows that the Company’s average annual net price increases (after taking sales deductions such as rebates, discounts and returns into account) across the U.S. human health portfolio have been in the low to mid-single digits since 2010.  Additionally, the weighted average annual discount rate has been steadily increasing over time, reflecting the competitive market for branded medicines and the impact of the ACA. In 2016, the Company’s gross U.S. sales were reduced by 40.9% as a result of rebates, discounts and returns.
Outside the United States, numerous major markets, including the EU, Japan and Japan,China have pervasive government involvement in funding health care and, in that regard, fix the pricing and reimbursement of pharmaceutical and vaccine products. Consequently, in those markets, the Company is subject to government decision making and budgetary actions with respect to its products.
The Company expects pricing pressures to increasecontinue in the future.
The health care industry in the United States will continue to be subject to increasing regulation and political action.
The Company believes that the health care industry will continue to be subject to increasing regulation as well as political and legal action, as future proposals to reform the health care system are considered by the Executive branch, Congress and state legislatures.
In 2010, the United States enacted major health care reform legislation in the form of the ACA. Various insurance market reforms have advanced and state and federal insurance exchanges were launched in 2014. With respect to the effect of the law on the pharmaceutical industry, the law increased the mandated Medicaid rebate from 15.1% to 23.1%, expanded the rebate to Medicaid managed care utilization, and increased the types of entities eligible for the federal 340B drug discount program.
The law also requires pharmaceutical manufacturers to pay a 50% point of service discount to Medicare Part D beneficiaries when they are in the Medicare Part D coverage gap (i.e., the so-called “donut hole”). In 2018, the Company’s revenue was reduced by $365 million due to this requirement. Beginning in 2019, the 50% point of service discount will increase to a 70% point of service discount in the coverage gap, as a result of the Balanced Budget Act of 2018. In addition, the 70% point of service discount will be extended to biosimilar products. Also, pharmaceutical manufacturers are now required to pay an annual non-tax deductible health care reform fee. The total annual industry fee was $3.0$4.1 billion in 20162018 and will increase to $4.0be $2.8 billion in 2017.2019. The fee is assessed on each company in proportion to its share of prior year branded pharmaceutical sales to certain government programs, such as Medicare and Medicaid. In 2018, the Company recorded $124 million of costs for this annual fee.
On January 21,In 2016, the Centers for Medicare & Medicaid Services (CMS) issued the Medicaid rebate final rule that implements provisions of the ACA effective April 1, 2016. The rule provides comprehensive guidance on the calculation of Average Manufacturer Price and Best Price; two metrics utilized to determine the rebates drug manufacturers are required to pay to state Medicaid programs. The impact of changes resulting from the issuance of the rule is not material to Merck, at this time. However, the Company is still awaiting guidance from CMS on two aspects of the rule that were deferred for later implementation. These include a definition of what constitutes a product ‘line extension’ and a delay

in the participation of the U.S. Territories in the Medicaid Drug Rebate Program until April 1, 2020. The Company will evaluate the financial impact of these two elements when they become effective.

The Company cannot predict the likelihood of future changes in the health care industry in general, or the pharmaceutical industry in particular, or what impact they may have on the Company’s business, cash flow, results of operations, financial position and prospects.
The Company is increasingly dependent on sophisticated software applications and computing infrastructure. In 2017, the Company experienced a network cyber-attack that led to a disruption of its worldwide operations, including manufacturing, research and sales operations. The Company could be a target of future cyber-attacks.
The Company is increasingly dependent on sophisticated software applications and complex information technology systems and computing infrastructure (collectively, “IT systems”) to conduct critical operations. Disruption, degradation, or manipulation of these IT systems through intentional or accidental means could impact key business processes. Cyber-attacks against the Company’s IT systems could result in exposure of confidential information, the modification of critical data, and/or the failure of critical operations. Misuse of these IT systems could result in the disclosure of sensitive personal information or the theft of trade secrets, intellectual property, or other confidential business information. The Company continues to leverage new and innovative technologies across the enterprise to improve the efficacy and efficiency of its business processes; the use of which can create new risks.
In 2017, the Company experienced a network cyber-attack that led to a disruption of its worldwide operations, including manufacturing, research and sales operations. Due to the cyber-attack, the Company was unable to fulfill orders for certain products in certain markets, which had an unfavorable effect on sales in 2017 of approximately $260 million. In addition, the Company recorded manufacturing-related expenses, primarily unfavorable manufacturing variances, in Cost of sales, as well as expenses related to remediation efforts in Selling, general and administrative expenses and Research and development expenses, which aggregated $285 million in 2017, net of insurance recoveries of approximately $45 million. Due to a residual backlog of orders, 2018 sales were unfavorably affected in certain markets by approximately $150 million from the cyber-attack.
The Company has insurance coverage insuring against costs resulting from cyber-attacks and has received proceeds. However, there are disputes with certain of the insurers about the availability of some of the insurance coverage for claims related to the 2017 cyber-attack.
The Company has implemented a variety of measures to further enhance and modernize its systems to guard against similar attacks in the future, and also is pursuing an enterprise-wide effort to enhance the Company's resiliency against future cyber-attacks, including incidents similar to the 2017 attack. The objective of these efforts is not only to protect against future cyber-attacks, but also to improve the speed of the Company’s recovery from such attacks and enable continued business operations to the greatest extent possible during any recovery period.
Although the aggregate impact of cyber-attacks and network disruptions, including the 2017 cyber-attack, on the Company’s operations and financial condition has not been material to date, the Company continues to be a target of events of this nature and expects them to continue. The Company monitors its data, information technology and personnel usage of Company IT systems to reduce these risks and continues to do so on an ongoing basis for any current or business.potential threats. There can be no assurance that the Company’s efforts to protect its data and IT systems will be successful in preventing disruptions to its operations, including its manufacturing, research and sales operations. Any such disruption could result in loss of revenue, or the loss of critical or sensitive information from the Company’s or the Company’s third party providers’ databases or IT systems and could also result in financial, legal, business or reputational harm to the Company and potentially substantial remediation costs.
Changes inThe Company is subject to a variety of U.S. and international laws and regulations.
The Company is currently subject to a number of government laws and regulations and, in the future, could materiallybecome subject to new government laws and regulations. The costs of compliance with such laws and regulations, or the negative results of non-compliance, could adversely affect the Company’s business.
All aspects of the Company’s business, including research and development, manufacturing, marketing, pricing, sales, litigation and intellectual property rights, are subject to extensive legislation and regulation. Changes in applicable federal and state laws and agency regulations could have a material adverse effect on the Company’s business.
In particular, there is significant uncertainty about the future of the ACA and healthcare laws in general in the United States. The Company is participating in the debate and monitoring how any proposed changes could affect its business. The Company is unable to predict the likelihood of changes to the ACA. Depending on the nature of any repeal and replacement of the ACA, such actions could have a material adverse effect on the Company’scash flow, results of operations, financial conditionposition and prospects of the Company; these laws and regulations include (i) additional healthcare reform initiatives in the United States or business.in other countries, including additional mandatory discounts or fees; (ii) the U.S. Foreign Corrupt Practices Act or other anti-bribery and corruption laws; (iii) new laws, regulations and judicial or other governmental

decisions affecting pricing, drug reimbursement, and access or marketing within or across jurisdictions; (iv) changes in intellectual property laws; (v) changes in accounting standards; (vi) new and increasing data privacy regulations and enforcement, particularly in the EU and the United States; (vii) legislative mandates or preferences for local manufacturing of pharmaceutical or vaccine products; (viii) emerging and new global regulatory requirements for reporting payments and other value transfers to healthcare professionals; (ix) environmental regulations; and (x) the potential impact of importation restrictions, embargoes, trade sanctions and legislative and/or other regulatory changes.
The uncertainty in global economic conditions together with austeritycost-reduction measures being taken by certain governments could negatively affect the Company’s operating results.
The uncertaintyUncertainty in global economic and geopolitical conditions may result in a further slowdown to the global economy that could affect the Company’s business by reducing the prices that drug wholesalers and retailers, hospitals, government agencies and managed health care providers may be able or willing to pay for the Company’s products or by reducing the demand for the Company’s products, which could in turn negatively impact the Company’s sales and result in a material adverse effect on the Company’s business, cash flow, results of operations, financial position and prospects.
Global efforts toward health care cost containment continue to exert pressure on product pricing and market access. In the United States, pricing pressures continue on many of the Company’s products and, in several international markets, government-mandated pricing actions have reduced prices of generic and patented drugs. In addition, other austerity measures negatively affected the Company’s revenue performance in 2016. The Company anticipates these pricing actions and other austerity measures will continue to negatively affect revenue performance in 2017.2019.
If credit and economic conditions worsen, the resulting economic and currency impacts in the affected markets and globally could have a material adverse effect on the Company’s results.
The Company has significant global operations, which expose it to additional risks, and any adverse event could have a material negative impact on the Company’s results of operations.
The extent of the Company’s operations outside the United States is significant. Risks inherent in conducting a global business include:
changes in medical reimbursement policies and programs and pricing restrictions in key markets;
multiple regulatory requirements that could restrict the Company’s ability to manufacture and sell its products in key markets;
trade protection measures and import or export licensing requirements;requirements, including the imposition of trade sanctions or similar restrictions by the United States or other governments;
foreign exchange fluctuations;
diminished protection of intellectual property in some countries; and
possible nationalization and expropriation.
In addition, there may be changes to the Company’s business and political position if there is instability, disruption or destruction in a significant geographic region, regardless of cause, including war, terrorism, riot, civil insurrection or social unrest; and natural or man-made disasters, including famine, flood, fire, earthquake, storm or disease. For example, in 2017, the Company’s lone manufacturing plant in Puerto Rico was negatively affected by Hurricane Maria.
In 2016, the United Kingdom (UK) held a referendum in which voters approved an exit from the EU, commonly referred to as “Brexit”. As a result of that referendum, the British government has been in the process of negotiating the terms of the UK’s future relationship with the EU. While the Company has taken actions and made certain contingency plans for scenarios in which the UK and the EU do not reach a mutually satisfactory understanding as to that relationship, it is not possible at this time to predict whether there will be any such understanding, or if such an understanding is reached, whether its terms will vary in ways that result in greater restrictions on imports and exports between the UK and EU countries, increased regulatory complexities, and/or cross border labor issues that could materially adversely impact the Company’s business operations in the UK.

Failure to attract and retain highly qualified personnel could affect itsthe Company’s ability to successfully develop and commercialize products.
The Company’s success is largely dependent on its continued ability to attract and retain highly qualified scientific, technical and management personnel, as well as personnel with expertise in clinical research and development, governmental regulation and commercialization. Competition for qualified personnel in the pharmaceutical industry is intense. The Company cannot be sure that it will be able to attract and retain quality personnel or that the costs of doing so will not materially increase.
In the past, the Company has experienced difficulties and delays in manufacturing of certain of its products.products, including vaccines.
Merck has, in the past, experienced difficulties in manufacturing certain of its vaccines and other products.products, including vaccines. In addition, the network cyber-attack experienced by the Company in June 2017 led to a disruption of the Company’s operations, including its manufacturing operations. The Company may, in the future, experience difficulties and delays inherent in manufacturing its products, such as (i) failure of the Company or any of its vendors or suppliers to comply with Current Good Manufacturing Practices and other applicable regulations and quality assurance guidelines that could lead to manufacturing shutdowns, product shortages and delays in product manufacturing; (ii) construction delays related to the construction of new facilities or the expansion of existing facilities, including those intended to support future demand for the Company’s products; and (iii) other manufacturing or distribution problems including changes in manufacturing production sites and limits to manufacturing capacity due to regulatory requirements, changes in types of products produced, or physical limitations that could impact continuous supply. In addition, the Company could experience difficulties or delays in manufacturing its products caused by natural disasters, such as hurricanes. Manufacturing difficulties can result in product shortages, leading to lost sales and reputational harm to the Company.
The Company may not be able to realize the expected benefits of its investments in emerging markets.
The Company has been taking steps to increase its sales in emerging markets. However, there is no guarantee that the Company’s efforts to expand sales in these markets will succeed. Some countries within emerging markets may be especially vulnerable to periods of global financial instability or may have very limited resources to spend on health care. In order for the Company to successfully implement its emerging markets strategy, it must attract and retain qualified personnel. The Company may also be required to increase its reliance on third-party agents within less developed markets. In addition, many of these countries have currencies that fluctuate substantially and, if such currencies devalue and the Company cannot offset the devaluations, the Company’s financial performance within such countries could be adversely affected.
The Company’s business in China has grown rapidly in the past few years, and the importance of China to the Company’s overall pharmaceutical and vaccines business outside the United States has increased accordingly. Continued growth of the Company’s business in China is dependent upon ongoing development of a favorable environment for innovative pharmaceutical products and vaccines, sustained access for the Company’s currently marketed products, and the absence of trade impediments or adverse pricing controls. As noted above in Healthcare Environment, pricing pressure in China has increased as the Chinese government has been taking steps to reduce costs, including implementing healthcare reform that has led to the acceleration of generic substitution, where available. In addition, in China, commercial and economic conditions may adversely affect the Company’s growth prospects in that market. While the Company continues to believe that China represents an important growth opportunity, these events, coupled with heightened scrutiny of the health care industry, may continue to have an impact on product pricing and market access generally. The Company anticipates that the reported inquiries made by various governmental authorities involving multinational pharmaceutical companies in China may continue.
For all these reasons, sales within emerging markets carry significant risks. However, a failure to maintain the Company’s presence in emerging markets could have a material adverse effect on the Company’s business, financial condition orcash flow, results of the Company’s operations.operations, financial position and prospects.
The Company is exposed to market risk from fluctuations in currency exchange rates and interest rates.
The Company operates in multiple jurisdictions and virtually all sales are denominated in currencies of the local jurisdiction. Additionally, the Company has entered and will enter into acquisition, licensing,business development transactions, borrowings or other financial transactions that may give rise to currency and interest rate exposure.

Since the Company cannot, with certainty, foresee and mitigate against such adverse fluctuations, fluctuations in currency exchange rates, and interest rates and inflation could negatively affect the Company’s business, cash flow, results of operations, financial position and cash flows as occurred with respect to Venezuela in 2015 and 2016.prospects.
In order to mitigate against the adverse impact of these market fluctuations, the Company will from time to time enter into hedging agreements. While hedging agreements, such as currency options and forwards and interest rate swaps, may limit some of the exposure to exchange rate and interest rate fluctuations, such attempts to mitigate these risks may be costly and not always successful.

The Company is subject to evolving and complex tax laws, which may result in additional liabilities that may affect results of operations.
The Company is subject to evolving and complex tax laws in the jurisdictions in which it operates. Significant judgment is required for determining the Company’s tax liabilities, and the Company’s tax returns are periodically examined by various tax authorities. The Company believes that its accrual for tax contingencies is adequate for all open years based on past experience, interpretations of tax law, and judgments about potential actions by tax authorities; however, due to the complexity of tax contingencies, the ultimate resolution of any tax matters may result in payments greater or less than amounts accrued.
In addition, the Company may be affected by changes in tax laws, including tax rate changes, changes to the laws related to the remittance of foreign earnings (deferral), or other limitations impacting the U.S. tax treatment of foreign earnings, new tax laws, andaffecting, for example, tax rates, and/or revised tax law interpretations in domestic andor foreign jurisdictions.
Pharmaceutical products can develop unexpected safety or efficacy concerns.
Unexpected safety or efficacy concerns can arise with respect to marketed products, whether or not scientifically justified, leading to product recalls, withdrawals, or declining sales, as well as product liability, consumer fraud and/or other claims, including potential civil or criminal governmental actions.
Reliance on third partythird-party relationships and outsourcing arrangements could adversely affect the Company’s business.
The Company depends on third parties, including suppliers, alliances with other pharmaceutical and biotechnology companies, and third partythird-party service providers, for key aspects of its business including development, manufacture and commercialization of its products and support for its information technology systems. Failure of these third parties to meet their contractual, regulatory and other obligations to the Company or the development of factors that materially disrupt the relationships between the Company and these third parties could have a material adverse effect on the Company’s business.
The Company is increasingly dependent on sophisticated software applications and computing infrastructure.
The Company is increasingly dependent on sophisticated software applications and computing infrastructure to conduct critical operations. Disruption, degradation, or manipulation of these applications and systems through intentional or accidental means could impact key business processes. Cyber-attacks against the Company’s applications and systems could result in exposure of confidential information, the modification of critical data, and/or the failure of critical operations. Misuse of these applications and systems could result in the disclosure of sensitive personal information or the theft of trade secrets and other confidential business information. The Company continues to leverage new and innovative technologies across the enterprise to improve the efficacy and efficiency of its business processes; the use of which can create new risks. Although the aggregate impact on the Company’s operations and financial condition has not been material to date, the Company has been the target of events of this nature and expects them to continue. The Company monitors its data, information technology and personnel usage of Company systems to reduce these risks and continues to do so on an ongoing basis for any current or potential threats. There can be no assurance that the Company’s efforts to protect its data and systems will prevent service interruption or the loss of critical or sensitive information from the Company’s or the Company’s third party providers’ databases or systems that could result in financial, legal, business or reputational harm to the Company.
Negative events in the animal health industry could have a negative impact on future results of operations.
Future sales of key animal health products could be adversely affected by a number of risk factors including certain risks that are specific to the animal health business. For example, the outbreak of disease carried by animals, such as Bovine Spongiform Encephalopathy or mad cow disease, could lead to their widespread death and precautionary destruction as well as the reduced consumption and demand for animals, which could adversely impact the Company’s results of operations. Also, the outbreak of any highly contagious diseases near the Company’s main production sites could require the Company to immediately halt production of vaccines at such sites or force the Company to incur substantial expenses in procuring raw materials or vaccines elsewhere. Other risks specific to animal health include

epidemics and pandemics, government procurement and pricing practices, weather and global agribusiness economic events. As the Animal Health segment of the Company’s business becomes more significant, the impact of any such events on future results of operations would also become more significant.
Biologics and vaccines carry unique risks and uncertainties, which could have a negative impact on future results of operations.
The successful development, testing, manufacturing and commercialization of biologics and vaccines, particularly human and animal health vaccines, is a long, complex, expensive and uncertain process. There are unique risks and uncertainties with biologics and vaccines, including:
There may be limited access to, and supply of, normal and diseased tissue samples, cell lines, pathogens, bacteria, viral strains and other biological materials. In addition, government regulations in multiple

jurisdictions, such as the United States and the EU, could result in restricted access to, or transport or use of, such materials. If the Company loses access to sufficient sources of such materials, or if tighter restrictions are imposed on the use of such materials, the Company may not be able to conduct research activities as planned and may incur additional development costs.
The development, manufacturing and marketing of biologics and vaccines are subject to regulation by the FDA, the EMA and other regulatory bodies. These regulations are often more complex and extensive than the regulations applicable to other pharmaceutical products. For example, in the United States, a BLA, including both preclinical and clinical trial data and extensive data regarding the manufacturing procedures, is required for human vaccine candidates, and FDA approval is generally required for the release of each manufactured commercial lot.
Manufacturing biologics and vaccines, especially in large quantities, is often complex and may require the use of innovative technologies to handle living micro-organisms. Each lot of an approved biologic and vaccine must undergo thorough testing for identity, strength, quality, purity and potency. Manufacturing biologics requires facilities specifically designed for and validated for this purpose, and sophisticated quality assurance and quality control procedures are necessary. Slight deviations anywhere in the manufacturing process, including filling, labeling, packaging, storage and shipping and quality control and testing, may result in lot failures, product recalls or spoilage. When changes are made to the manufacturing process, the Company may be required to provide pre-clinical and clinical data showing the comparable identity, strength, quality, purity or potency of the products before and after such changes.
Biologics and vaccines are frequently costly to manufacture because production ingredients are derived from living animal or plant material, and most biologics and vaccines cannot be made synthetically. In particular, keeping up with the demand for vaccines may be difficult due to the complexity of producing vaccines.
The use of biologically derived ingredients can lead to variability in the manufacturing process and could lead to allegations of harm, including infections or allergic reactions, orwhich allegations would be reviewed through a standard investigation process that could lead to closure of product facilities due to possible contamination. Any of these events could result in substantial costs.
Product liability insurance for products may be limited, cost prohibitive or unavailable.
As a result of a number of factors, product liability insurance has become less available while the cost has increased significantly. The Company is subject to a substantial number of product liability claims. See Item 8. “Financial Statements and Supplementary Data,” Note 11. “Contingencies and Environmental Liabilities” below for more information on the Company’s current product liability litigation. With respect to product liability, the Company self-insures substantially all of its risk, as the availability of commercial insurance has become more restrictive. The Company has evaluated its risks and has determined that the cost of obtaining product liability insurance outweighs the likely benefits of the coverage that is available and, as such, has no insurance for certain product liabilities effective August 1, 2004, including liability for legacy Merck products first sold after that date. The Company will continually assess the most efficient means to address its risk; however, there can be no guarantee that insurance coverage will be obtained or, if obtained, will be sufficient to fully cover product liabilities that may arise.
Social media platforms present risks and challenges.
The inappropriate and/or unauthorized use of certain media vehicles could cause brand damage or information leakage or could lead to legal implications, including from the improper collection and/or dissemination of personally identifiable information. In addition, negative or inaccurate posts or comments about the Company or its products on

any social networking web siteplatforms could damage the Company’s reputation, brand image and goodwill. Further, the disclosure of non-public Company-sensitive information by the Company’s workforce or others through external media channels could lead to information loss. Although there is an internal Company Social Media Policy that guides employees on appropriate personal and professional use of social media about the Company, the processes in place may not completely secure and protect information. Identifying new points of entry as social media continues to expand also presents new challenges.

Cautionary Factors that May Affect Future Results
(Cautionary Statements Under the Private Securities Litigation Reform Act of 1995)
This report and other written reports and oral statements made from time to time by the Company may contain so-called “forward-looking statements,” all of which are based on management’s current expectations and are subject to risks and uncertainties which may cause results to differ materially from those set forth in the statements. One can identify these forward-looking statements by their use of words such as “anticipates,” “expects,” “plans,” “will,” “estimates,” “forecasts,” “projects” and other words of similar meaning.meaning, or negative variations of any of the foregoing. One can also identify them by the fact that they do not relate strictly to historical or current facts. These statements are likely to address the Company’s growth strategy, financial results, product development, product approvals, product potential, and development programs. One must carefully consider any such statement and should understand that many factors could cause actual results to differ materially from the Company’s forward-looking statements. These factors include inaccurate assumptions and a broad variety of other risks and uncertainties, including some that are known and some that are not. No forward-looking statement can be guaranteed and actual future results may vary materially. The Company does not assume the obligation to update any forward-looking statement. The Company cautions you not to place undue reliance on these forward-looking statements. Although it is not possible to predict or identify all such factors, they may include the following:
Competition from generic and/or biosimilar products as the Company’s products lose patent protection.
Increased “brand” competition in therapeutic areas important to the Company’s long-term business performance.
The difficulties and uncertainties inherent in new product development. The outcome of the lengthy and complex process of new product development is inherently uncertain. A drug candidate can fail at any stage of the process and one or more late-stage product candidates could fail to receive regulatory approval. New product candidates may appear promising in development but fail to reach the market because of efficacy or safety concerns, the inability to obtain necessary regulatory approvals, the difficulty or excessive cost to manufacture and/or the infringement of patents or intellectual property rights of others. Furthermore, the sales of new products may prove to be disappointing and fail to reach anticipated levels.
Pricing pressures, both in the United States and abroad, including rules and practices of managed care groups, judicial decisions and governmental laws and regulations related to Medicare, Medicaid and health care reform, pharmaceutical reimbursement and pricing in general.
Changes in government laws and regulations, including laws governing intellectual property, and the enforcement thereof affecting the Company’s business.
Efficacy or safety concerns with respect to marketed products, whether or not scientifically justified, leading to product recalls, withdrawals or declining sales.
Significant changes in customer relationships or changes in the behavior and spending patterns of purchasers of health care products and services, including delaying medical procedures, rationing prescription medications, reducing the frequency of physician visits and foregoing health care insurance coverage.
Legal factors, including product liability claims, antitrust litigation and governmental investigations, including tax disputes, environmental concerns and patent disputes with branded and generic competitors, any of which could preclude commercialization of products or negatively affect the profitability of existing products.
Cyber-attacks on the Company’s information technology systems, which could disrupt the Company’s operations.
Lost market opportunity resulting from delays and uncertainties in the approval process of the FDA and foreign regulatory authorities.

Increased focus on privacy issues in countries around the world, including the United States and the EU. The legislative and regulatory landscape for privacy and data protection continues to evolve, and there has been

an increasing amount of focus on privacy and data protection issues with the potential to affect directly the Company’s business, including recently enacted laws in a majority of states in the United States requiring security breach notification.
Changes in tax laws including changes related to the taxation of foreign earnings.
Changes in accounting pronouncements promulgated by standard-setting or regulatory bodies, including the Financial Accounting Standards Board and the SEC, that are adverse to the Company.
Economic factors over which the Company has no control, including changes in inflation, interest rates and foreign currency exchange rates.
This list should not be considered an exhaustive statement of all potential risks and uncertainties. See “Risk Factors” above.
Item 1B.Unresolved Staff Comments.
None.
Item 2.Properties.
The Company’s corporate headquarters is located in Kenilworth, New Jersey. The Company’s U.S. commercial operations are headquartered in Upper Gwynedd, Pennsylvania. The Company’s U.S. pharmaceutical business is conducted through divisional headquarters located in Upper Gwynedd, Pennsylvania and Kenilworth, New Jersey. The Company’s vaccines business is conducted through divisional headquarters located in West Point,Upper Gwynedd, Pennsylvania. Merck’s Animal Health global headquarters is located in Madison, New Jersey. Principal U.S. research facilities are located in Rahway and Kenilworth, New Jersey, West Point, Pennsylvania, Palo Alto, California, Boston, Massachusetts, South San Francisco, California and Elkhorn, Nebraska (Animal Health). Principal research facilities outside the United States are located in Switzerland and China. Merck’s manufacturing operations are headquartered in Whitehouse Station, New Jersey. The Company also has production facilities for human health products at nine locations in the United States and Puerto Rico. Outside the United States, through subsidiaries, the Company owns or has an interest in manufacturing plants or other properties in Japan, Singapore, South Africa, and other countries in Western Europe, Central and South America, and Asia.
Capital expenditures were $2.6 billion in 2018, $1.9 billion in 2017 and $1.6 billion in 2016, $1.3 billion in 2015 and $1.3 billion in 2014.2016. In the United States, these amounted to $1.5 billion in 2018, $1.2 billion in 2017 and $1.0 billion in 2016, $879 million in 2015 and $873 million in 2014.2016. Abroad, such expenditures amounted to $1.1 billion in 2018, $728 million in 2017 and $594 million in 2016, $404 million in 2015 and $444 million in 2014.2016.
The Company and its subsidiaries own their principal facilities and manufacturing plants under titles that they consider to be satisfactory. The Company believes that its properties are in good operating condition and that its machinery and equipment have been well maintained. Plants for the manufacture of products are suitable for their intended purposes and have capacities and projected capacities adequate for current and projected needs for existing Company products. Some capacity of the plants is being converted, with any needed modification, to the requirements of newly introduced and future products. In addition, in October 2018, the Company announced it plans to invest approximately $16 billion on new capital projects from 2018-2022. The focus of this investment will primarily be on increasing manufacturing capacity across Merck’s key businesses.
Item 3.Legal Proceedings.
The information called for by this Item is incorporated herein by reference to Item 8. “Financial Statements and Supplementary Data,” Note 10.11. “Contingencies and Environmental Liabilities”.
Item 4.Mine Safety Disclosures.
Not Applicable.

Executive Officers of the Registrant (ages as of February 1, 2017)2019)
All officers listed abovebelow serve at the pleasure of the Board of Directors. None of these officers was elected pursuant to any arrangement or understanding between the officer and the Board.any other person(s).
NameAgeOffices and Business Experience
Kenneth C. Frazier6264Chairman, President and Chief Executive Officer (since December 2011); President and Chief Executive Officer (January 2011-December 2011), President (May 2010-January 2011)
Adele D. Ambrose60Senior Vice President and Chief Communications Officer (since November 2009)
Sanat Chattopadhyay5759Executive Vice President and President, Merck Manufacturing Division (since March 2016); Senior Vice President, Operations, Merck Manufacturing Division (November 2009-March 2016)
Frank Clyburn54Executive Vice President, Chief Commercial Officer (since January 2019); President, Global Oncology Business Unit (October 2013-December 2018); President, Primary Care and Women’s Health Business Line (September 2011-October 2013)
Robert M. Davis5052Executive Vice President, Global Services, and Chief Financial Officer (since April 2016); Executive Vice President and Chief Financial Officer (April 2014-April 2016); Corporate Vice President and President, Medical Products, Baxter International, Inc. (2010-March(October 2010-March 2014)
Richard R. DeLuca, Jr.5456Executive Vice President and President, Merck Animal Health (since September 2011)
Julie L. Gerberding6162Executive Vice President and Chief Patient Officer, Strategic Communications, Global Public Policy and Population Health (since July 2016); Executive Vice President for Strategic Communications, Global Public Policy and Population Health (January 2015-July 2016); President, Merck Vaccines (January 2010-January 2015)
Mirian M. Graddick-Weir62Executive Vice President, Human Resources (since November 2009)
Michael J. Holston54Executive Vice President and General Counsel (since July 2015); Executive Vice President and Chief Ethics and Compliance Officer (June 2012-July 2015); Executive Vice President, General Counsel and Board Secretary, Hewlett-Packard Company (2007-December 2011)
Rita A. Karachun5355Senior Vice President Finance - Global Controller (since March 2014); Assistant Controller (November 2009-March 2014)
Steven C. Mizell

58Executive Vice President, Chief Human Resources Officer, Human Resources (since October 2018); Executive Vice President, Chief Human Resources Officer (December 2016-October 2018) and Executive Vice President, Human Resources, Monsanto Company (August 2011-December 2016)
Michael T. Nally43Executive Vice President, Chief Marketing Officer (since January 2019); President, Global Vaccines, Global Human Health (September 2016-January 2019); Managing Director, United Kingdom and Ireland, Global Human Health (January 2014-September 2016); Managing Director, Sweden, Global Human Health (November 2011-January 2014)
Roger M. Perlmutter, M.D., Ph.D.6466Executive Vice President and President, Merck Research Laboratories (since April 2013);
Jim Scholefield56Executive Vice President, ResearchChief Information and Development, Amgen Inc. (2001-February 2012)Digital Officer (since October 2018); Chief Information Officer, Nike, Inc (July 2015-October 2018); Chief Technology Officer, The Coca-Cola Company, (November 2010-June 2015)
Adam H. SchechterJennifer Zachary5241Executive Vice President and President, Global Human HealthGeneral Counsel (since May 2010)April 2018); Partner, Covington & Burling LLP (January 2013-March 2018)



PART II
 
Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
The principal market for trading of the Company’s Common Stock is the New York Stock Exchange (NYSE) under the symbol MRK. The Common Stock market price information set forth in the table below is based on historical NYSE market prices.
The following table also sets forth, for the calendar periods indicated, the dividend per share information.
 Cash Dividends Paid per Common Share         
  Year
 4th Q
 3rd Q
 2nd Q
 1st Q
 2016$1.84
 $0.46
 $0.46
 $0.46
 $0.46
 2015$1.80
 $0.45
 $0.45
 $0.45
 $0.45
 Common Stock Market Prices
 
 2016  4th Q
 3rd Q
 2nd Q
 1st Q
 High  $65.46
 $64.00
 $57.87
 $53.60
 Low  $58.29
 $57.18
 $52.44
 $47.97
 2015         
 High  $55.77
 $60.07
 $61.70
 $63.62
 Low  $48.35
 $45.69
 $56.22
 $55.64

As of January 31, 2017,2019, there were approximately 128,600115,320 shareholders of record.record of the Company’s Common Stock.

Issuer purchases of equity securities for the three months ended December 31, 20162018 were as follows:
Issuer Purchases of Equity Securities
 ($ in millions) ($ in millions)
Period 
Total Number
of Shares
Purchased(1)
 
Average Price
Paid Per
Share
 
Approximate Dollar Value of Shares
That May Yet Be Purchased
Under the Plans or Programs(1)
 
Total Number
of Shares
Purchased(1)
 
Average Price
Paid Per
Share
 
Approximate Dollar Value of Shares
That May Yet Be Purchased
Under the Plans or Programs(1)
October 1 — October 31 5,451,200 $62.17 $5,732 59,154,075 $70.56 
$12,709(2)
November 1 — November 30 5,447,800 $61.39 $5,397 5,279,715 $74.64 $12,315
December 1 — December 31 5,618,000 $60.96 $5,055 4,788,526 $76.30 $11,949
Total 16,517,000 $61.50 $5,055 69,222,316 $71.27 $11,949

(1) 
All shares purchased during the period were made as part of a plan approved by the Board of Directors in March 2015November 2017 to purchase up to $10 billion in Merck shares. In October 2018, the Board of Directors authorized additional purchases of up to $10 billion of Merck’s common stock for its treasury. Shares are approximated.
(2)
Amount includes $1.0 billion being held back pending final settlement under the accelerated share repurchase agreements discussed below.

Performance Graph
The following graph assumes a $100 investment on December 31, 2011,2013, and reinvestment of all dividends, in each of the Company’s Common Shares, the S&P 500 Index, and a composite peer group of the major U.S.-based pharmaceutical companies, which are: AbbVie Inc., Amgen Inc., AstraZeneca plc, Bristol-Myers Squibb Company, Johnson & Johnson, Eli Lilly and Company, andGlaxoSmithKline plc, Novartis AG, Pfizer Inc., Roche Holding AG, and Sanofi SA.
Comparison of Five-Year Cumulative Total ReturnReturn*
Merck & Co., Inc., Composite Peer Group and S&P 500 Index
End of
Period Value
 
2016/2011
CAGR**
End of
Period Value
 
2018/2013
CAGR**
MERCK$186 13%$179 12%
PEER GRP.**208 16%142 7%
S&P 500198 15%150 8%

chart-c37e259168895f1daaca01.jpg
201120122013201420152016201320142015201620172018
MERCK100.00113.09143.42167.76161.33185.64100.00117.10112.40129.40127.40178.70
PEER GRP.100.00115.52160.92188.77197.89208.45100.00111.40114.80111.20133.00142.20
S&P 500100.00115.99153.55174.55176.95198.10100.00113.70115.20129.00157.20150.30

*Compound Annual Growth Rate
**Peer group average was calculated on a market cap weighted basis. In addition, AbbVie Inc. replaced Abbott Laboratories in the peer group beginning 2013 following the spin off from Abbott Laboratories.

This Performance Graph will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that the Company specifically incorporates it by reference. In addition, the Performance Graph will not be deemed to be “soliciting material” or to be “filed” with the SEC or subject to Regulation 14A or 14C, other than as provided in Regulation S-K, or to the liabilities of section 18 of the Securities Exchange Act of 1934, except to the extent that the Company specifically requests that such information be treated as soliciting material or specifically incorporates it by reference into a filing under the Securities Act or the Exchange Act.

Item 6.Selected Financial Data.                        
The following selected financial data should be read in conjunction with Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and consolidated financial statements and notes thereto contained in Item 8. “Financial Statements and Supplementary Data” of this report.
Merck & Co., Inc. and Subsidiaries
($ in millions except per share amounts)
2016 (1)
 
2015 (2)
 
2014 (3)
 2013 
2012(4)
2018 (1)
 
2017 (2)(3)
 
2016 (2)(4)
 
2015 (2)(5)
 
2014 (2)(6)
Results for Year:                  
Sales$39,807
 $39,498
 $42,237
 $44,033
 $47,267
$42,294
 $40,122
 $39,807
 $39,498
 $42,237
Materials and production13,891
 14,934
 16,768
 16,954
 16,446
Marketing and administrative9,762
 10,313
 11,606
 11,911
 12,776
Cost of sales13,509
 12,912
 14,030
 15,043
 16,903
Selling, general and administrative10,102
 10,074
 10,017
 10,508
 11,816
Research and development10,124
 6,704
 7,180
 7,503
 8,168
9,752
 10,339
 10,261
 6,796
 7,290
Restructuring costs651
 619
 1,013
 1,709
 664
632
 776
 651
 619
 1,013
Other (income) expense, net720
 1,527
 (11,613) 411
 474
(402) (500) 189
 1,131
 (12,068)
Income before taxes4,659
 5,401
 17,283
 5,545
 8,739
8,701
 6,521
 4,659
 5,401
 17,283
Taxes on income718
 942
 5,349
 1,028
 2,440
2,508
 4,103
 718
 942
 5,349
Net income3,941
 4,459
 11,934
 4,517
 6,299
6,193
 2,418
 3,941
 4,459
 11,934
Less: Net income attributable to noncontrolling interests21
 17
 14
 113
 131
Less: Net (loss) income attributable to noncontrolling interests(27) 24
 21
 17
 14
Net income attributable to Merck & Co., Inc.3,920
 4,442
 11,920
 4,404
 6,168
6,220
 2,394
 3,920
 4,442
 11,920
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders$1.42
 $1.58
 $4.12
 $1.49
 $2.03
$2.34
 $0.88
 $1.42
 $1.58
 $4.12
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders$1.41
 $1.56
 $4.07
 $1.47
 $2.00
$2.32
 $0.87
 $1.41
 $1.56
 $4.07
Cash dividends declared5,135
 5,115
 5,156
 5,132
 5,173
5,313
 5,177
 5,135
 5,115
 5,156
Cash dividends declared per common share$1.85
 $1.81
 $1.77
 $1.73
 $1.69
$1.99
 $1.89
 $1.85
 $1.81
 $1.77
Capital expenditures1,614
 1,283
 1,317
 1,548
 1,954
2,615
 1,888
 1,614
 1,283
 1,317
Depreciation1,611
 1,593
 2,471
 2,225
 1,999
1,416
 1,455
 1,611
 1,593
 2,471
Average common shares outstanding (millions)2,766
 2,816
 2,894
 2,963
 3,041
2,664
 2,730
 2,766
 2,816
 2,894
Average common shares outstanding assuming dilution (millions)2,787
 2,841
 2,928
 2,996
 3,076
2,679
 2,748
 2,787
 2,841
 2,928
Year-End Position:                  
Working capital (5)
$13,410
 $10,550
 $14,198
 $17,461
 $15,922
$3,669
 $6,152
 $13,410
 $10,550
 $14,198
Property, plant and equipment, net12,026
 12,507
 13,136
 14,973
 16,030
13,291
 12,439
 12,026
 12,507
 13,136
Total assets (5)
95,377
 101,677
 98,096
 105,370
 105,876
82,637
 87,872
 95,377
 101,677
 98,096
Long-term debt (5)
24,274
 23,829
 18,629
 20,472
 16,212
19,806
 21,353
 24,274
 23,829
 18,629
Total equity40,308
 44,767
 48,791
 52,326
 55,463
26,882
 34,569
 40,308
 44,767
 48,791
Year-End Statistics:                  
Number of stockholders of record129,500
 135,500
 142,000
 149,400
 157,400
115,800
 121,700
 129,500
 135,500
 142,000
Number of employees68,000
 68,000
 70,000
 77,000
 83,000
69,000
 69,000
 68,000
 68,000
 70,000
(1)
Amounts for 2018 include a charge related to the formation of a collaboration with Eisai Co., Ltd.
(2)
Amounts have been recast as a result of the adoption, on January 1, 2018, of a new accounting standard related to the classification of certain defined benefit plan costs. There was no impact to net income as a result of adopting the new accounting standard.
(3)
Amounts for 2017 include a provisional net tax charge related to the enactment of U.S. tax legislation and a charge related to the formation of a collaboration with AstraZeneca.
(4) 
Amounts for 2016 include a charge related to the settlement of worldwide patent litigation related to Keytruda.
(2)(5) 
Amounts for 2015 include a net charge related to the settlement of Vioxx shareholder class action litigation, foreign exchange losses related to Venezuela, gains on the dispositions of businesses and other assets, and the favorable benefit of certain tax items.
(3)(6) 
Amounts for 2014 reflect the divestiture of Merck’s Consumer Care business on October 1, 2014, including a gain on the sale, as well as a gain recognized on an option exercise by AstraZeneca, gains on the dispositions of other businesses and assets, and a loss on extinguishment of debt.
(4)

Amounts for 2012 include a net charge recorded in connection with the settlement of certain shareholder litigation.
(5)
Amounts have been restated to give effect to the adoption of accounting guidance issued by the Financial Accounting Standards Board. See Note 2 to Item 8(a). “Financial Statements.”



Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations.
Description of Merck’s Business
Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines, vaccines, biologic therapies and animal health products. The Company’s operations are principally managed on a products basis and include four operating segments, which are the Pharmaceutical, Animal Health, Healthcare Services and Alliances segments. The Pharmaceutical segment isand Animal Health segments are the only reportable segment.segments.
The Pharmaceutical segment includes human health pharmaceutical and vaccine products marketed either directly by the Company or through joint ventures.products. Human health pharmaceutical products consist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. The Company sells these human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy benefit managers and other institutions. VaccineHuman health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. Sales of vaccines in most major European markets were marketed through the Company’sOn December 31, 2016, Merck and Sanofi Pasteur S.A. (Sanofi) terminated their equally-owned joint venture, Sanofi Pasteur MSD (SPMSD) joint venture until its termination on December 31, 2016. Beginning, which developed and marketed vaccines in Europe. In 2017, Merck will recordbegan recording vaccine sales and incurring costs as a result of operating its vaccines business in the European markets that were previously part of the SPMSD joint venture.venture, which was accounted for as an equity method affiliate.
The Company also has animal health operations that discover, develop, manufactureAnimal Health segment discovers, develops, manufactures and marketmarkets animal health products, including vaccines,pharmaceutical and vaccine products, for the prevention, treatment and control of disease in all major livestock and companion animal species, which the Company sells to veterinarians, distributors and animal producers.
The Company’s Healthcare Services segment provides services and solutions that focus on engagement, health analytics and clinical services to improve the value of care delivered to patients. Merck’s
The Alliances segment primarily includes resultsactivity from the Company’s relationship with AstraZeneca LP untilrelated to sales of Nexium and Prilosec, which concluded in 2018 (see Note 9 to the termination of that relationship on June 30, 2014. On October 1, 2014, the Company divested its Consumer Care segment that developed, manufactured and marketed over-the-counter, foot care and sun care products.consolidated financial statements).
Overview
During 2016, Merck continued to executeThe Company’s performance during 2018 demonstrates execution of its innovation strategy, with revenue growth in oncology, vaccines, hospital acute care and the Company’s sustainedanimal health, focused investment in the research yielded a numberand development pipeline, and disciplined allocation of recent approvalsresources. Additionally, Merck completed several business development transactions, expanded its capital expenditures program primarily to increase future manufacturing capacity, and regulatory milestones across various therapeutic areas. The Company received several approvalsreturned capital to shareholders.
Worldwide sales were $42.3 billion in 2016 that include expanded indications for2018, an increase of 5% compared with 2017. Strong growth in the oncology franchise reflects the performance of Keytruda, as well as alliance revenue related to Lynparza and Lenvima resulting from Merck’s business development activities. Also contributing to revenue growth were higher sales of vaccines, driven primarily by Gardasil/Gardasil 9, and growth in the hospital acute care franchise, largely attributable to Bridion and Noxafil. Higher sales of animal health products, reflecting increases in companion animal and livestock products both from in-line and recently launched products, also contributed to revenue growth. Growth in these areas was partially offset by competitive pressures on Zepatier and Zostavax, as well as the ongoing effects of generic and biosimilar competition that resulted in sales declines for products including Zetia, Vytorin, and Remicade.
Augmenting Merck’s portfolio and pipeline with external innovation remains an important component of the Company’s anti-PD-1 (programmed death receptor-1) therapy,overall strategy. In 2018, Merck continued executing on this strategy by entering into a strategic collaboration with Eisai Co., Ltd. (Eisai) for the worldwide co-development and co-commercialization of Lenvima. Lenvima is an orally available tyrosine kinase inhibitor discovered by Eisai, which wasis approved byfor certain types of thyroid cancer, hepatocellular carcinoma, and in combination for certain patients with renal cell carcinoma. Under the agreement, Merck and Eisai will develop and commercialize Lenvima jointly, both as monotherapy and in combination with Keytruda. In addition, Merck acquired Viralytics Limited (Viralytics), a company focused on oncolytic immunotherapy treatments for a range of cancers. Also, the Company announced an agreement to acquire Antelliq Group (Antelliq), a leader in digital animal identification, traceability and monitoring solutions.

During 2018, the Company advanced its leadership in oncology through focused commercial execution, the achievement of important regulatory milestones and the presentation of clinical data. Keytruda continues its global launch with multiple new indicationsacross several tumor types, including approval from the U.S. Food and Drug Administration (FDA) for the first-line treatment of metastaticcertain patients with cervical cancer, primary mediastinal large B-cell lymphoma (PMBCL), a type of non-Hodgkin lymphoma, hepatocellular carcinoma, Merkel cell carcinoma, and in combination with chemotherapy for the treatment of certain patients with squamous non-small-cell lung cancer (NSCLC), as well as for the treatment of head and neck cancer. Additionally, in 2016, both the FDA and. Also during 2018, the European Commission (EC) approved Zepatier, a once-daily, single tablet combination therapy for the treatment of chronic hepatitis C virus (HCV) genotype (GT) 1 or GT4 infection, with ribavirin in certain patient populations.
Worldwide sales were $39.8 billion in 2016, an increase of 1% compared with 2015, including a 2% unfavorable effect from foreign exchange. Sales growth was driven by oncology, HCV, vaccine, and hospital acute care products, reflecting in part the ongoing launches of Keytruda, Zepatier and Bridion, as well as positive performance from Merck’s Animal Health business. Growth in these areas was largely offset by the effects of generic and biosimilar competition that resulted in declines for products such as Remicade and Nasonex.
Business development remains an important component of the Company’s overall strategy as Merck seeks to identify the best external innovation to augment its portfolio and pipeline, with a particular focus on early-to-mid-stage pipeline assets. Merck looks for growth opportunities that meet the Company’s strategic criteria. While looking for the best scientific opportunities, Merck remains financially disciplined, pursuing those business opportunities that the Company believes can contribute to long-term growth and sustainable value for shareholders.
In January 2016, Merck acquired IOmet Pharma Ltd (IOmet), a drug discovery company focused on the development of innovative medicines for the treatment of cancer, with a particular emphasis on the fields of cancer immunotherapy and cancer metabolism. In July 2016, Merck acquired Afferent Pharmaceuticals (Afferent), a privately held pharmaceutical company focused on the development of therapeutic candidates targeting the P2X3 receptor for the treatment of common, poorly-managed, neurogenic conditions, such as chronic cough. In addition, in 2016, Merck entered into a strategic collaboration and license agreement with Moderna Therapeutics (Moderna) to develop and commercialize novel messenger RNA (mRNA)-based personalized cancer vaccines.

Merck continues to support its in-line portfolio, as well as ongoing and upcoming product launches. Keytruda is launching around the world in multiple indications. In 2016, Merck achieved multiple additional regulatory milestones for Keytruda including approval from the FDA for the first-line treatment of patients with NSCLC whose tumors have high PD-L1 expression (tumor proportion score [TPS] of 50% or more) as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations and also for the treatment of patients with recurrent or metastatic head and neck squamous cell carcinoma with disease progression on or after platinum-containing chemotherapy. Additionally, in 2016, the EC approved Keytruda for the treatment of locally advanced or metastatic NSCLCcertain patients with head and neck squamous cell carcinoma (HNSCC), for the adjuvant treatment of melanoma, and in patients whose tumors express PD-L1 and who have received at least one priorcombination with chemotherapy regimen. In January 2017, the EC approved Keytruda for the first-line treatment of certain patients with nonsquamous NSCLC. This was the first approval in Europe for an anti-PD-1 therapy in combination with chemotherapy. Also in 2018, Keytruda was approved in China for the treatment of certain patients with melanoma. Additionally, Merck recently announced the receipt of five new approvals for Keytruda in Japan, including three expanded uses in advanced NSCLC, one in adjuvant melanoma, as well as a new indication in advanced microsatellite instability-high (MSI-H) tumors. Keytruda also continues to launch in many other international markets.
In 2018, Lynparza, which is being developed in a collaboration with AstraZeneca PLC (AstraZeneca), received FDA approval for use in certain patients with metastatic NSCLCbreast cancer who have been previously treated with chemotherapy, and for use as maintenance treatment of adult patients with certain types of advanced ovarian, fallopian tube or primary peritoneal cancer who are in adults whose tumors have high PD-L1 expression (TPS of 50%complete or more) with no EGFR or ALK positive tumor mutations.partial response to chemotherapy. Additionally, the Company is continuing its launch of ZepatierLenvima was approved in the United States, and in emerging markets and is now launching in the European Union (EU), Japan and China for the treatment of certain patients with hepatocellular carcinoma. The FDA and EC also approved two new HIV-1 medicines: Delstrigo, a once-daily fixed-dose combination tablet of doravirine, lamivudine and tenofovir disoproxil fumarate; and Pifeltro (doravirine), a new non-nucleoside reverse transcriptase inhibitor to be administered in Japan.combination with other antiretroviral medicines.
Merck is focusingcontinues to invest in its research effortspipeline, with an emphasis on the therapeuticbeing a leader in immuno-oncology and expanding in other areas that it believes can have the most impact on human health, such as oncology, diabetes, cardiometabolic disease, resistant microbial infectionvaccines and Alzheimer’s disease.hospital acute care. In addition to the recent regulatory approvals discussed above, the Company has continued to advance other programs in its late-stage pipeline with several regulatory submissions. Merck has five supplemental biologics license applications (sBLA) under Priority Review with the FDA for Keytruda including:is under review in the United States in combination with axitinib, a tyrosine kinase inhibitor, for usethe first-line treatment of patients with advanced renal cell carcinoma for which it has been granted Priority Review by the FDA; in the EU for the first-line treatment of certain patients with metastatic squamous NSCLC; in the United States and in the EU as monotherapy for the first-line treatment of certain patients with locally advanced or metastatic NSCLC; in the United States as monotherapy for the treatment of certain patients with advanced small-cell lung cancer (SCLC); and in the United States as monotherapy or in combination with chemotherapy for the first-line treatment of certain patients with recurrent or metastatic or advanced non-squamous NSCLC regardlessHNSCC for which it has been granted Priority Review by the FDA. Additionally, MK-7655A, the combination of PD-L1 expressionrelebactam and with no EGFR or ALK genomic tumor aberrations;imipenem/cilastatin, has been accepted for Priority Review by the FDA for the treatment of patientscomplicated urinary tract infections and complicated intra-abdominal infections caused by certain susceptible Gram-negative bacteria in adults with classical Hodgkin lymphoma; forlimited or no alternative therapies available. Merck has also started the treatment of previously treated patients with advanced microsatellite instability-high cancer; for the first-line treatment of patients with locally advanced or metastatic urothelial cancer, including most bladder cancers; and for the second-line treatment of patients with locally advanced or metastatic urothelial cancer with disease progression on or after platinum-containing chemotherapy. Merck is driving a broad immuno-oncology development program and investing in the long-term potential for Keytruda to become foundational in the treatmentsubmission of a range of cancers. The Keytruda clinical development program includes more than 400 clinical trials in more than 30 tumor types; over 200 of these trials combine Keytruda with other cancer treatments. MK-1293,rolling Biologics License Application (BLA) to the FDA for V920, an insulin glargine candidate for the treatment of patients with type 1 and type 2 diabetes being developed in a collaboration, is also under review with the FDA.investigational Ebola Zaire disease vaccine candidate.
In addition toThe Company’s Phase 3 oncology programs forinclude Keytruda in the therapeutic areas of breast, cervical, colorectal, esophageal, gastric, hepatocellular, multiple myeloma,mesothelioma, nasopharyngeal, ovarian, renal and renal cancers,small-cell lung cancers; Lynparza for pancreatic and prostate cancer; and Lenvima in combination with Keytruda for endometrial cancer. Additionally, the Company also has candidates in Phase 3 clinical development in several other therapeutic areas, including V114, an investigational polyvalent conjugate vaccine for the prevention of pneumococcal disease that received Breakthrough Therapy designation from the FDA for the prevention of invasive pneumococcal disease caused by the vaccine serotypes in pediatric patients 6 weeks to 18 years of age; MK-7264, gefapixant, a selective, non-narcotic, orally-administered P2X3-receptor agonist being developed for the treatment of refractory, chronic cough; and MK-1242, vericiguat, an investigational treatment for heart failure being developed in a collaboration (see “Research and Development” below).
DuringThe Company is allocating resources to effectively support its commercial opportunities in the past year,near term while making the Company continued its focus on productivity improvements, looking for opportunities to reallocate resources across the portfolio to grow its strongest brands andnecessary investments to support the most promising assets in its pipeline. Marketing and administrative expenses declined in 2016 as compared with 2015 reflecting in part this continued focus by the Company on prioritizing its resources to the highest growth areas.long-term growth. Research and development expenses in 20162018 reflect increasedhigher clinical development spending as the Company continues to investand investment in the pipeline.discovery and early drug development.

In November 2016,October 2018, Merck’s Board of Directors raisedapproved a 15% increase to the Company’s quarterly dividend, raising it to $0.47$0.55 per share from $0.46$0.48 per share.share on the Company’s outstanding common stock. Also in October 2018, Merck’s Board of Directors approved a $10 billion share repurchase program and the Company entered into $5 billion of accelerated share repurchase (ASR) agreements. During 2016,2018, the Company returned $8.6$14.3 billion to shareholders through dividends and share repurchases.
In January 2017, Merck entered into a settlement and license agreement to resolve worldwide patent infringement litigation related to Keytruda. In connection with the settlement, Merck recorded a pretax charge of $625 million in the fourth quarter of 2016 (see Note 10 to the consolidated financial statements).
Earnings per common share assuming dilution attributable to common shareholders (EPS) for 20162018 were $1.41$2.32 compared with $1.56$0.87 in 2015.2017. EPS in both years reflect the impact of acquisition and divestiture-related costs, including a charge in 2016 related to the uprifosbuvir clinical development program, as well as restructuring costs and certain other items. Certain other items in 2018 include a charge related to the formation of the collaboration with Eisai and in 2017 include a provisional net tax charge related to the enactment of U.S. tax legislation and a charge related to the formation of a collaboration with AstraZeneca. Non-GAAP EPS, which excludesexclude these items, were $3.78$4.34 in 20162018 and $3.59$3.98 in 20152017 (see “Non-GAAP Income and Non-GAAP EPS” below).
Pricing
Global efforts toward health care cost containment continue to exert pressure on product pricing and market access worldwide. In the United States, pricing pressure continues on many of the Company’s products. Changes to the U.S. health care system as part of health care reform, as well as increased purchasing power of entities that negotiate on behalf of Medicare, Medicaid, and private sector beneficiaries, have contributed to pricing pressure. In several international markets, government-mandated pricing actions have reduced prices of generic and patented drugs. In addition, the Company’s revenue performance in 2018 was negatively affected by other cost-reduction measures taken by governments and other third-parties to lower health care costs. The Company anticipates all of these actions will continue to negatively affect revenue performance in 2019.
Cyber-attack
On June 27, 2017, the Company experienced a network cyber-attack that led to a disruption of its worldwide operations, including manufacturing, research and sales operations. Due to a backlog of orders for certain products as a result of the cyber-attack, the Company was unable to fulfill orders for certain products in certain markets, which had an unfavorable effect on sales in 2018 and 2017 of approximately $150 million and $260 million, respectively. In addition, the Company recorded manufacturing-related expenses, primarily unfavorable manufacturing variances, in Cost of sales, as well as expenses related to remediation efforts in Selling, general and administrative expenses and Research and development expenses, which aggregated approximately $285 million in 2017, net of insurance recoveries of approximately $45 million. Costs in 2018 were immaterial.
As referenced above, the Company has insurance coverage insuring against costs resulting from cyber-attacks and has received insurance proceeds. However, there are disputes with certain of the insurers about the availability of some of the insurance coverage for claims related to this incident.


Operating Results
Sales
Worldwide sales were $39.8$42.3 billion in 2016,2018, an increase of 5% compared with 2017. Sales growth was driven primarily by higher sales in the oncology franchise reflecting strong growth of Keytruda, as well as alliance revenue related to Lynparza and Lenvima. Also contributing to revenue growth were higher sales of vaccines, driven primarily by human papillomavirus (HPV) vaccine Gardasil/Gardasil 9, as well as higher sales in the hospital acute care franchise, largely attributable to Bridion and Noxafil. Higher sales of animal health products also drove revenue growth in 2018.
Sales growth in 2018 was partially offset by declines in the virology franchise driven primarily by lower sales of hepatitis C virus (HCV) treatment Zepatier, as well as lower sales of shingles (herpes zoster) vaccine Zostavax. The ongoing effects of generic and biosimilar competition for cardiovascular products Zetia and Vytorin, and immunology product Remicade, as well as lower sales of products within the diversified brands franchise also partially offset revenue growth in 2018. The diversified brands franchise includes certain products that are approaching the expiration of their marketing exclusivity or that are no longer protected by patents in developed markets.
Sales in the United States were $18.2 billion in 2018, growth of 5% compared with 2017. The increase was driven primarily by higher sales of Keytruda, Gardasil/Gardasil 9, NuvaRing, and Bridion, as well as alliance revenue

from Lynparza and Lenvima, and higher sales of animal health products. Growth was partially offset by lower sales of Zepatier, Zetia, Vytorin, Zostavax, Januvia, Janumet, Invanz, and products within the diversified brands franchise.
International sales were $24.1 billion in 2018, an increase of 6% compared with 2017. The increase primarily reflects growth in Keytruda, Gardasil/Gardasil 9, Januvia, Janumet and Atozet, as well as higher sales of animal health products. Sales growth was partially offset by lower sales of Zepatier, Remicade, Zetia, Vytorin, and products within the diversified brands franchise. International sales represented 57% of total sales in both 2018 and 2017.
Worldwide sales were $40.1 billion in 2017, an increase of 1% compared with 2015. Foreign exchange unfavorably affected global sales performance2016. Sales growth in 2017 was driven primarily by 2% in 2016, which includes a lower benefit from revenue hedging activities as compared with 2015. Revenue growth primarily reflects higher sales in the oncology franchise largely fromof Keytruda, the launch of the HCV treatment Zepatier and Bridion. Additionally, sales in 2017 benefited from the December 31, 2016 termination of SPMSD, which marketed vaccines in most major European markets. In 2017, Merck began recording vaccine sales in the markets that were previously part of the SPMSD joint venture resulting in incremental vaccine sales of approximately $400 million during 2017. Higher sales of Pneumovax 23, Adempas, and animal health products also contributed to revenue growth in vaccine2017. These increases were largely offset by the effects of generic competition for certain products including Gardasil/Gardasil Zetia9,, which lost U.S. market exclusivity in December 2016, Vytorin, which lost U.S. market exclusivity in April 2017, Cubicin Varivaxdue to U.S. patent expiration in June 2016, and Cancidas, which lost EU patent protection in April 2017. Revenue growth was also offset by continued biosimilar competition for Remicade and ongoing generic erosion for products including Singulair and PneumovaxNasonex 23. Also contributing. Collectively, the sales decline attributable to sales growththe above products affected by generic and biosimilar competition was $3.3 billion in 2016 were higher2017. Lower sales of hospital acute careother products including Bridion and Noxafil, growth within the diversified brands franchise, as well as lower combined sales of the diabetes franchise of Januvia and Janumet, as well as higherand declines in sales of Animal Health products, particularly BravectoIsentress/Isentress HD. These increases were partially offset by sales declines attributable to the ongoing effects of generic and biosimilar competition for certain products, including Remicade and Nasonex, along with other products within Diversified Brands. Declines in Isentress, PegIntron and Dulera Inhalation Aerosol also partially offset revenue growthgrowth. Additionally, sales in 2016. Sales performance in 2016 reflects a decline of approximately $6252017 were reduced by $125 million due to reduced operations bya borrowing the Company in Venezuela as a resultmade from the U.S. Centers for Disease Control and Prevention (CDC) Pediatric Vaccine Stockpile of evolving economic conditions and volatility in that country.
Sales in the United States were $18.5 billion in 2016, an increase of 5% compared with $17.5 billion in 2015. Within the Pharmaceutical segment, sales in the United States grew 5% in 2016 driven primarily by the launchesdoses of ZepatierGardasil and Bridion, along with higher sales of Keytruda and Gardasil/Gardasil 9 partially offset by lower sales of Nasonex, Cubicin, Dulera Inhalation Aerosol, and Isentress.
International sales were $21.3 billion in 2016, a decline of 3% compared with $22.0 billion in 2015. Foreign exchange unfavorably affected international sales performance by 4% in 2016. International sales withinas discussed below. Also, the Pharmaceutical segment declined 3% in 2016, including a 3% unfavorable effect from foreign exchange, largely reflecting declines in certain emerging markets, offset by an increase in Japan. Sales in emerging markets were $6.7 billion in 2016, a decline of 9% including a 6% unfavorable effect from foreign exchange, driven primarily by reduced operations in Venezuela, partially offset by growth in other markets. Sales in Japan grew 6% in 2016,Company was unable to $2.8 billion, which includes a 10% favorable effect from foreign exchange. Excluding the favorable effect of foreign exchange, the sales decline in Japan was largely driven by the loss of market exclusivity for Singulair combined with the ongoing generic erosion for products within Diversified Brands, partially offset by higher sales of Belsomra. Sales in Europe were $7.7 billion in 2016, essentially flat as compared with 2015, including a 2% unfavorable effect from foreign exchange. Excluding the unfavorable effect of foreign exchange, sales performance in Europe primarily reflects volume growth in Keytruda, Cubicin, Simponi, Adempas, Liptruzet, and the Januvia franchise, partially offset by ongoing biosimilar competition and generic erosionfulfill orders for certain products particularly Remicade, and other pricing pressures in this region. Total international sales represented 54% and 56% of totalcertain markets due to the cyber-attack, which had an unfavorable effect on sales in 2016 and 2015, respectively.2017 of approximately $260 million.
Global efforts toward health care cost containment continueSee Note 19 to exert pressurethe consolidated financial statements for details on product pricing and market access worldwide. In the United States, health care reform is contributing to an increase in the number of patients in the Medicaid program under which sales of pharmaceutical products are subject to substantial rebates. In many international markets, government-mandated pricing actions have reduced prices of generic and patented drugs. In addition, other austerity measures negatively affected the Company’s revenue performance in 2016. The Company anticipates these pricing actions and other austerity measures will continue to negatively affect revenue performance in 2017.

Worldwide sales were $39.5 billion in 2015, a decline of 6% compared with 2014 including a 6% unfavorable effect from foreign exchange. The acquisition of Cubist Pharmaceuticals, Inc. (Cubist) in 2015, the divestiture of Merck’s Consumer Care (MCC) business in 2014, as well as product divestitures and the termination of the Company’s relationship with AstraZeneca LP (AZLP) also in 2014, as discussed below, had a net unfavorable impact to sales of approximately 3%. In addition, sales performance in 2015 reflects declines in PegIntron and Victrelis, Remicade, Pneumovax 23, Nasonex, and Vytorin. These declines were partially offset by volume growth in Keytruda, Januvia and Janumet, Gardasil/Gardasil 9, Noxafil, Simponi, Implanon/Nexplanon, Invanz, Dulera Inhalation Aerosol, and Bridion, as well as volume growth in Animal Health products and higher third-party manufacturing sales.products.
In January 2015, the Company acquired Cubist, which contributed sales of $1.3 billion to Merck’s revenues in 2015. In 2014, the Company divested certain ophthalmic products in several international markets (most of which closed on July 1, 2014). In addition, on October 1, 2014, the Company divested its MCC business including the prescription rights to Claritin and Afrin. The sales decline in 2015 attributable to these divestitures was approximately $1.9 billion of which $1.5 billion related to the Consumer Care segment and $400 million related to the Pharmaceutical segment. Also, in 2014, the Company sold the U.S. marketing rights to Saphris, an antipsychotic indicated for the treatment of schizophrenia and bipolar I disorder in adults, which resulted in revenue of $232 million. Additionally, the Company’s relationship with AZLP terminated on June 30, 2014; therefore, effective July 1, 2014, the Company no longer records supply sales to AZLP. These supply sales were $463 million in 2014 through the termination date and were reflected in the Alliances segment.

Sales of the Company’s products were as follows:
($ in millions)2016 2015 2014
Primary Care and Women’s Health     
Cardiovascular     
Zetia$2,560
 $2,526
 $2,650
Vytorin1,141
 1,251
 1,516
Diabetes     
Januvia3,908
 3,863
 3,931
Janumet2,201
 2,151
 2,071
General Medicine and Women’s Health     
NuvaRing777
 732
 723
Implanon/Nexplanon606
 588
 502
Dulera436
 536
 460
Follistim AQ355
 383
 412
Hospital and Specialty     
Hepatitis     
Zepatier555
 
 
HIV     
Isentress1,387
 1,511
 1,673
Hospital Acute Care     
Cubicin (1)
1,087
 1,127
 25
Noxafil595
 487
 402
Invanz561
 569
 529
Cancidas558
 573
 681
Bridion482
 353
 340
Primaxin297
 313
 329
Immunology     
Remicade1,268
 1,794
 2,372
Simponi766
 690
 689
Oncology     
Keytruda1,402
 566
 55
Emend549
 535
 553
Temodar283
 312
 350
Diversified Brands     
Respiratory     
Singulair915
 931
 1,092
Nasonex537
 858
 1,099
Other     
Cozaar/Hyzaar511
 667
 806
Arcoxia450
 471
 519
Fosamax284
 359
 470
Zocor186
 217
 258
Vaccines (2)
     
Gardasil/Gardasil 9
2,173
 1,908
 1,738
ProQuad/M-M-R II/Varivax
1,640
 1,505
 1,394
Zostavax685
 749
 765
RotaTeq652
 610
 659
Pneumovax 23
641
 542
 746
Other pharmaceutical (3)
4,703
 5,105
 6,233
Total Pharmaceutical segment sales35,151
 34,782
 36,042
Other segment sales (4)
3,862
 3,667
 5,758
Total segment sales39,013
 38,449
 41,800
Other (5)
794
 1,049
 437
 $39,807
 $39,498
 $42,237
(1)
Sales of Cubicin in 2015 represent sales subsequent to the Cubist acquisition date. Sales of Cubicin in 2014 reflect sales in Japan pursuant to a previously existing licensing agreement.
(2)
These amounts do not reflect sales of vaccines sold in most major European markets through the Company’s joint venture, SPMSD, the results of which are reflected in equity income from affiliates which is included in Other (income) expense, net. These amounts do, however, reflect supply sales to SPMSD. On December 31, 2016, Merck and Sanofi Pasteur terminated the SPMSD joint venture (see Note 8 to the consolidated financial statements).
(3)
Other pharmaceutical primarily reflects sales of other human health pharmaceutical products, including products within the franchises not listed separately.
(4)
Represents the non-reportable segments of Animal Health, Healthcare Services and Alliances, as well as Consumer Care until its divestiture on October 1, 2014. The Alliances segment includes revenue from the Company’s relationship with AZLP until termination on June 30, 2014.
(5)
Other is primarily comprised of miscellaneous corporate revenues, including revenue hedging activities, as well as third-party manufacturing sales. Other in 2016 and 2014 also includes approximately $170 million and $232 million, respectively, in connection with the sale of the marketing rights to certain products.


Pharmaceutical Segment
Primary CareOncology
Keytruda is approved in the United States and Women’s Health
Cardiovascular
Combined global salesin the EU as monotherapy for the treatment of certain patients with NSCLC, melanoma, classical Hodgkin lymphoma (cHL), HNSCC and urothelial carcinoma, a type of bladder cancer, and in combination with chemotherapy for certain patients with nonsquamous NSCLC. ZetiaKeytruda (marketedis also approved in most countries outside the United States as monotherapy for the treatment of certain patients with gastric or gastroesophageal junction adenocarcinoma and MSI-H or mismatch repair deficient cancer. In addition, the FDA recently approved EzetrolKeytruda )for the treatment of certain patients with cervical cancer, PMBCL, hepatocellular carcinoma, Merkel cell carcinoma, and in combination with chemotherapy for patients with squamous NSCLC (see below). Vytorin Keytruda( is approved in Japan for the treatment of certain patients with NSCLC, both as monotherapy and in combination with chemotherapy, melanoma, cHL, MSI-H tumors, and urothelial carcinoma. Additionally, Keytruda has been approved in China for the treatment of certain patients with melanoma. Keytruda is also approved in many other international markets. The Keytruda clinical development program includes studies across a broad range of cancer types (see “Research and Development” below).
In August 2018, the FDA approved an expanded label for Keytruda in combination with pemetrexed and platinum chemotherapy for the first-line treatment of patients with metastatic nonsquamous NSCLC, with no EGFR or ALK genomic tumor aberrations, based on results of the KEYNOTE-189 trial. Keytruda in combination with pemetrexed and carboplatin was first approved in 2017 under the FDA’s accelerated approval process for the first-line treatment of patients with metastatic nonsquamous NSCLC, based on tumor response rates and progression-free survival (PFS) data from a Phase 2 study (KEYNOTE-021, Cohort G1). In accordance with the accelerated approval process, continued approval was contingent upon verification and description of clinical benefit, which was demonstrated in KEYNOTE-189 and resulted in the FDA converting the accelerated approval to full (regular) approval. Also, in September 2018, the EC approved Keytruda in combination with pemetrexed and platinum chemotherapy for the first-line treatment of metastatic nonsquamous NSCLC in adults whose tumors have no EGFR or ALK positive mutations.
In June 2018, the FDA approved Keytruda for the treatment of patients with recurrent or metastatic cervical cancer with disease progression on or after chemotherapy whose tumors express PD-L1 as determined by an FDA-

approved test. Also in June 2018, the FDA approved Keytruda for the treatment of adult and pediatric patients with refractory PMBCL, or who have relapsed after two or more prior lines of therapy.
In September 2018, the EC approved Keytruda as monotherapy for the treatment of recurrent or metastatic HNSCC in adults whose tumors express PD-L1 with a tumor proportion score (TPS) of ≥50%, and who progressed on or after platinum-containing chemotherapy, based on data from the Phase 3 KEYNOTE-040 trial.
In October 2018, the FDA approved Keytruda, in combination with carboplatin and either paclitaxel or nab-paclitaxel, for the first-line treatment of patients with metastatic squamous NSCLC based on results from the KEYNOTE-407 trial. This approval marks the first time an anti-PD-1 regimen has been approved for the first-line treatment of squamous NSCLC regardless of tumor PD-L1 expression status.
In November 2018, the FDA approved Keytruda for the treatment of patients with hepatocellular carcinoma who have been previously treated with sorafenib based on data from the KEYNOTE-224 trial.
In December 2018, the FDA approved Keytruda for the treatment of adult and pediatric patients with recurrent locally advanced or metastatic Merkel cell carcinoma, based on the results of the Cancer Immunotherapy Trials Network’s CITN-09/KEYNOTE-017 trial.
Also in December 2018, the EC approved Keytruda for the adjuvant treatment of adults with stage III melanoma and lymph node involvement who have undergone complete resection. Keytruda was approved for this indication by the FDA in February 2019. These approvals were based on data from the pivotal Phase 3 EORTC1325/KEYNOTE-054 trial, conducted in collaboration with the European Organisation for Research and Treatment of Cancer.
Global sales of Keytruda were $7.2 billion in 2018, $3.8 billion in 2017 and $1.4 billion in 2016. The year-over-year increases were driven by volume growth as the Company continues to launch Keytruda with multiple new indications globally. Sales in the United States continue to build across the multiple approved indications, in particular for the treatment of NSCLC reflecting both the continued adoption of Keytruda in the first-line setting as monotherapy for patients with metastatic NSCLC whose tumors have high PD-L1 expression, as well as the uptake of Keytruda in combination with pemetrexed and carboplatin, a commonly used chemotherapy regimen, for the first-line treatment of metastatic nonsquamous NSCLC with or without PD-L1 expression. Other indications contributing to sales growth include HNSCC, bladder, and melanoma. Recently approved indications, including squamous NSCLC and MSI-H cancer, also contributed to growth in 2018. Sales growth in international markets reflects continued uptake for the treatment of NSCLC as the Company has secured reimbursement in most major markets. Sales growth in international markets in 2018 also includes contributions from the more recently approved indications as described above, including for the treatment of HNSCC, bladder cancer and in combination with chemotherapy for the treatment of NSCLC in the EU, multiple new indications in Japan, and for the treatment of melanoma in China.
In January 2017, Merck entered into a settlement and license agreement to resolve worldwide patent infringement litigation related to Keytruda. Pursuant to the settlement, the Company will pay royalties of 6.5% on net sales of Keytruda in 2017 through 2023; and 2.5% on net sales of Keytruda in 2024 through 2026.
Global sales of Emend, for the prevention of chemotherapy-induced and post-operative nausea and vomiting, were $522 million in 2018, a decline of 6% compared with 2017 including a 1% favorable effect from foreign exchange. The decline primarily reflects lower demand in the United States due to competition. Worldwide sales of Emend were $556 million in 2017, an increase of 1% compared with 2016. The patent that provided U.S. market exclusivity for Emend expired in 2015 and the patent that provides market exclusivity in most major European markets will expire in May 2019. The patent that provides U.S. market exclusivity for Emend for Injection expires in September 2019 and the patent that provides market exclusivity in major European markets expires in February 2020 (although six-month pediatric exclusivity may extend this date). The Company anticipates that sales of Emend in these markets will decline significantly after these patent expiries.
Lynparza, an oral poly (ADP-ribose) polymerase (PARP) inhibitor being developed as part of a collaboration with AstraZeneca entered into in July 2017 (see Note 4 to the consolidated financial statements), is currently approved for certain types of ovarian and breast cancer. Merck recorded alliance revenue of $187 million in 2018 and $20 million in 2017 related to Lynparza. The revenue increase reflects the approval of new indications, as well as a full year of activity in 2018. In January 2018, the FDA approved Lynparza for use in patients with BRCA-mutated, human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer who have been previously treated with chemotherapy,

triggering a $70 million capitalized milestone payment from Merck to AstraZeneca. Lynparza was also approved in Japan in July 2018 for use in patients with unresectable or recurrent BRCA-mutated, HER2-negative breast cancer who have received prior chemotherapy. Additionally, Lynparza was approved for use as a maintenance therapy in patients with platinum-sensitive relapsed ovarian cancer, regardless of BRCA mutation status in Japan in January 2018 and in the EU in May 2018. In December 2018, the FDA approved Lynparza for use as maintenance treatment of adult patients with deleterious or suspected deleterious germline or somatic BRCA-mutated advanced epithelial ovarian, fallopian tube or primary peritoneal cancer who are in complete or partial response to first-line platinum-based chemotherapy based on the results of the SOLO-1 clinical trial, triggering a $70 million capitalized milestone payment from Merck to AstraZeneca.
Lenvima, an oral receptor tyrosine kinase inhibitor being developed as part of a collaboration with Eisai entered into in March 2018 (see Note 4 to the consolidated financial statements), is approved for certain types of thyroid cancer, hepatocellular carcinoma, and in combination for certain patients with renal cell carcinoma. Merck recorded alliance revenue of $149 million in 2018 related to Lenvima. In 2018, Lenvima was approved for the treatment of certain patients with hepatocellular carcinoma in the United States, the EU, Japan and China, triggering capitalized milestone payments of $250 million in the aggregate from Merck to Eisai.
Vaccines
On December 31, 2016, Merck and Sanofi terminated their equally-owned joint venture, SPMSD, which developed and marketed outsidevaccines in Europe. Accordingly, vaccine sales in 2018 and 2017 include sales of Merck vaccines in the European markets that were previously part of the SPMSD joint venture, whereas sales in periods prior to 2017 do not. Prior to 2017, vaccine sales in these European markets were sold through the SPMSD joint venture, the results of which were reflected in equity income from affiliates included in Other (income) expense, net. Supply sales to SPMSD, however, are included in vaccine sales in periods prior to 2017. Incremental vaccine sales resulting from the termination of the SPMSD joint venture were approximately $400 million in 2017, of which approximately $215 million relate to Gardasil/Gardasil 9.
Worldwide sales of Gardasil/Gardasil 9, vaccines to help prevent certain cancers and other diseases caused by certain types of HPV, were $3.2 billion in 2018, growth of 37% compared with 2017 including a 1% favorable effect from foreign exchange. Sales growth was driven primarily by higher sales in the Asia Pacific region, particularly in China reflecting continued uptake since launch, as well as higher demand in certain European markets. The sales increase was also attributable to the replenishment in 2018 of doses borrowed from the CDC Pediatric Vaccine Stockpile in 2017 as discussed below. In April 2018, China’s Food and Drug Administration approved Gardasil 9 for use in girls and women ages 16 to 26. In October 2018, the FDA approved an expanded age indication for use in women and men ages 27 to 45 for the prevention of certain cancers and diseases caused by the nine HPV types covered by the vaccine.
During 2017, the Company made a request to borrow doses of Gardasil 9 from the CDC Pediatric Vaccine Stockpile, which the CDC granted. The Company’s decision to borrow the doses from the CDC was driven in part by the temporary shutdown resulting from the cyber-attack that occurred in June 2017, as well as by overall higher demand than expected. As a result of the borrowing, the Company reversed the sales related to the borrowed doses and recognized a corresponding liability. The Company subsequently replenished a portion of the doses borrowed from the stockpile. The net effect of the borrowing and subsequent partial replenishment was a reduction in sales of $125 million in 2017. The Company replenished the remaining borrowed doses in 2018 resulting in the recognition of sales of $125 million in 2018 and a reversal of the related liability.
Global sales of Gardasil/Gardasil 9 were $2.3 billion in 2017, growth of 6% compared with 2016. Sales growth was driven primarily by higher sales in Europe resulting from the termination of the SPMSD joint venture noted above, as well as higher demand in the Asia Pacific region due in part to the launch in China, partially offset by lower sales in the United States. Lower sales in the United States reflect the timing of public sector purchases and the CDC stockpile borrowing as described above.
The Company is a party to certain third-party license agreements with respect to Gardasil/Gardasil 9 pursuant to which the Company pays royalties on worldwide Gardasil/Gardasil 9 sales. The royalties, which vary by country and range from 7% to 13%, are included in Cost of sales.
Global sales of ProQuad, a pediatric combination vaccine to help protect against measles, mumps, rubella and varicella, were $593 million in 2018, an increase of 12% compared with 2017, driven primarily by higher volumes

and pricing in the United States and volume growth in certain European markets. Worldwide sales of ProQuad were $528 million in 2017, an increase of 7% compared with $495 million in 2016. Sales growth in 2017 was driven primarily by higher pricing and volumes in the United States, as well as volume growth in international markets, particularly in Europe. Foreign exchange favorably affected global sales performance by 1% in 2017.
Worldwide sales of InegyM-M-R), medicines for lowering LDL cholesterol, II, a vaccine to help protect against measles, mumps and rubella, were $3.7 billion$430 million in 2016, a decline2018, an increase of 2%13% compared with 2015 including a 1% unfavorable effect from foreign exchange. In addition,2017, driven primarily by volume growth in 2016, the Company recorded sales of $146 million for Atozet, a medicine for lowering LDL cholesterol, which the Company markets in certain countries outside of the United States.Latin America. Global sales of M-M-R II were $382 million in 2017, an increase of 8% compared with $353 million in 2016. Sales growth in 2017 was largely attributable to higher sales in Europe resulting from the ezetimibe family (includingtermination of the SPMSD joint venture. Foreign exchange favorably affected global sales performance by 1% in 2018 and unfavorably affected global sales performance by 1% in 2017.
Global sales of AtozetVarivax,) a vaccine to help prevent chickenpox (varicella), were $3.8 billion$774 million in 2016, growth2018, an increase of 1% compared with 2015,2017, reflecting volume growth in EuropeLatin America and the Asia Pacific region, along with higher pricing in the United States, largely offset by lower salesvolume declines in VenezuelaTurkey from the loss of a government tender due to reduced operationscompetition. Worldwide sales of Varivax were $767 million in this country and2017, a decline of 3% compared with $792 million in 2016. The sales decline in 2017 was driven primarily by lower volumes in Brazil due to the loss of a government tender, as well as lower sales in the United States reflecting lower demand that was partially offset by higher pricing. Higher sales in part generic competition for Europe resulting from the termination of the SPMSD joint venture partially offset the sales decline in 2017.
Zetia. By agreement, a generic manufacturer launched a generic versionWorldwide sales of ZetiaPneumovax 23, a vaccine to help prevent pneumococcal disease, were $907 million in 2018, an increase of 10% compared with 2017. Sales growth was driven primarily by higher pricing in the United States and volume growth in DecemberEurope. Global sales of Pneumovax 23 were $821 million in 2017, an increase of 28% compared with 2016, driven primarily by higher demand and pricing in the Company is experiencing a rapid declineUnited States, as well as higher sales in U.S.Europe resulting from the termination of the SPMSD joint venture. Foreign exchange unfavorably affected sales performance by 1% in 2017.
Global sales of ZetiaRotaTeq, sales.a vaccine to help protect against rotavirus gastroenteritis in infants and children, were $728 million in 2018, an increase of 6% compared with 2017, driven primarily by the launch in China. Worldwide sales of RotaTeq were $686 million in 2017, an increase of 5% compared with 2016, driven primarily by higher sales in Europe resulting from the termination of the SPMSD joint venture.
Worldwide sales of Zostavax, a vaccine to help prevent shingles (herpes zoster) in adults 50 years of age and older, were $217 million in 2018, a decline of 68% compared with 2017, driven by lower volumes in most markets, particularly in the United States. Lower demand in the United States reflects the launch of a competing vaccine that received a preferential recommendation from the CDC’s Advisory Committee on Immunization Practices in October 2017 for the prevention of shingles over Zostavax. The declines were partially offset by higher demand in certain European markets. The Company anticipates the declinecompetition will acceleratecontinue to have an adverse effect on sales of Zostavax in future periods. The U.S. patent and exclusivity periods for Zetia and Vytorin otherwise expire in April 2017 and the Company anticipates declines in U.S. Zetia and Vytorin sales thereafter. U.S.Global sales of Zetia and VytorinZostavax were $1.6 billion and $473$668 million respectively, in 2016. The Company has market exclusivity in major European markets for Ezetrol until April 2018 and for Inegy until April 2019. Combined worldwide sales of the ezetimibe family were $3.8 billion in 2015,2017, a decline of 9%2% compared with 20142016 including an 8% unfavorablea 1% favorable effect from foreign exchange. The sales decline was driven primarily by lower volumes of Ezetrol in Canada where it lost market exclusivity in September 2014, as well as by lower volumesdemand in the United States reflecting the approval of a competing vaccine as noted above, partially offset by higher pricinggrowth in Europe resulting from the termination of the SPMSD joint venture and volume growth in the Asia Pacific region.
In 2018, the FDA approved Vaxelis (Diphtheria and Tetanus Toxoids and Acellular Pertussis Adsorbed, Inactivated Poliovirus, Haemophilus b Conjugate [Meningococcal Protein Conjugate] and Hepatitis B [Recombinant] Vaccine) for use in children from 6 weeks through 4 years of age (prior to the 5th birthday). Vaxelis, which is currently being marketed in Europe, was developed as part of a joint-partnership between Merck and Sanofi. Merck and Sanofi are working to maximize production of Vaxelis to allow for a sustainable supply to meet anticipated U.S. demand. Commercial supply will not be available prior to 2020. 
Hospital Acute Care
Global sales of Bridion, for the reversal of two types of neuromuscular blocking agents used during surgery, were $917 million in 2018, growth of 30% compared with 2017, driven primarily by volume growth in the United States and certain European markets. Worldwide sales of Bridion were $704 million in 2017, growth of 46% compared with 2016, driven by strong global demand, particularly in the United States.
Pursuant to a collaboration between Merck and Bayer AG (Bayer) (see Note 3 to the consolidated financial statements), Merck has lead commercial rights for Adempas, a novel cardiovascular drug for the treatment of pulmonary arterial hypertension, in countries outside the Americas while Bayer has lead rights in the Americas, including the United States. In 2016, Merck began promoting and distributing Adempas in Europe. Transition in other Merck territories will continue in 2017. Merck recorded sales for Adempas of $169 million in 2016, which includes sales in Merck’s marketing territories, as well as Merck’s share of profits from the sale of Adempas in Bayer’s marketing territories.
In September 2016, Merck sold the marketing rights for Zontivity in the United States and Canada to Aralez Pharmaceuticals Inc. for a $25 million upfront payment and royalties at graduated rates, plus potential future consideration dependent upon the achievement of certain aggregate annual sales-based milestones. Previously, in March 2016, following several business decisions that reduced sales expectations for Zontivity in the United States and Europe, the Company lowered its cash flow projections for Zontivity. The Company utilized market participant assumptions and considered several different scenarios to determine the fair value of the intangible asset related to Zontivity that, when compared with its related carrying value, resulted in an impairment charge of $252 million recorded in Materials and production costs in 2016.
Diabetes
Worldwide combined sales of Januvia and JanumetNoxafil, medicines that help lower blood sugar levelsfor the prevention of invasive fungal infections, were $742 million in adults with type 2 diabetes, were $6.1 billion in 2016,2018, an increase of 2%17% compared with 2015. Sales growth was driven primarily by higher volumes in the United States, Europe and Canada, partially offset by pricing pressures in the United States and Europe, and lower sales in Venezuela due to the Company’s reduced operations in that country. Combined global sales of Januvia and Janumet were $6.0 billion in 2015, essentially flat as compared with 20142017 including a 7% unfavorable2% favorable effect from foreign exchange. Sales performancegrowth primarily reflects higher volumesdemand in the United States, certain European markets and China. Global sales of Noxafil were $636 million in 2017, an increase of 7% compared with 2016, primarily reflecting higher demand and pricing in the United States, as well as volume growth in emergingEurope. The patent that provides U.S. market exclusivity for Noxafil expires in July 2019. Additionally, the patent for Noxafil will expire in a number of major European markets and Europe. Volume declines of co-marketed sitagliptin in Japan due to the timing of sales to the licensee partially offset growth in 2015.
General Medicine and Women’s Health 
WorldwideDecember 2019. The Company anticipates sales of NuvaRingNoxafil , a vaginal contraceptive product, were $777 million in 2016, an increase of 6% compared with 2015, and were $732 million in 2015, an increase of 1% compared with 2014. Foreign exchange unfavorably affected global sales performance by 1% and 7% in 2016 and 2015, respectively. Sales growth in both years largely reflects higher pricing in the United States. Volume declines in Europe partially offset revenue growth in 2016. In August 2016, the U.S. District Court ruled that the Company’s delivery system patent for NuvaRing is invalid. The Company is appealing this verdict to the U.S. Court of Appeals for the Federal Circuit. However, given the U.S. District Court’s decision, there may be generic entrants into the U.S. market in advance of the April 2018 patent

expiration. If this should occur, the Company anticipates a significantthese markets will decline in U.S. NuvaRing salessignificantly thereafter. U.S. sales of NuvaRing were $576 million in 2016. As a result of the unfavorable U.S. District Court decision, the Company evaluated the intangible asset related to NuvaRing for impairment and concluded that it was not impaired. The intangible asset value for NuvaRing was $319 million at December 31, 2016.
Worldwide sales of Implanon/Nexplanon, single-rod subdermal contraceptive implants, grew to $606 million in 2016, an increase of 3% compared with 2015 including a 3% unfavorable effect from foreign exchange. Sales growth reflects higher demand in the United States, partially offset by declines in certain emerging markets, particularly in Venezuela. Implanon/Nexplanon sales rose to $588 million in 2015, a 17% increase compared with 2014 including a 6% unfavorable effect from foreign exchange. The increase was driven primarily by higher demand in the United States and in emerging markets.
Global sales of DuleraInvanz Inhalation Aerosol, a combination medicine, for the treatment of asthma,certain infections, were $436$496 million in 2016,2018, a decline of 19%18% compared with 20152017 including a 1% unfavorable effect from foreign exchange. The decline was driven by lower sales in the United Sales reflecting competitive pricing pressures that were partially offset by higher demand. Worldwide sales of Dulera Inhalation Aerosol grew 16% in 2015 to $536 million driven primarily by higher demand in the United States.
Global sales of Follistim AQ (marketed in most countries outside the United States as Puregon), a fertility treatment, were $355 million in 2016, a decline of 7% compared with 2015 including a 2% unfavorable effect from foreign exchange. The sales decline primarily reflects lower volumes in Europe due in part to supply issues and lower demand in certain emerging markets. Worldwide sales of Follistim AQ were $383 million in 2015, a decline of 7% compared with 2014, reflecting a 9% unfavorable effect from foreign exchange that was offset by higher pricing in the United States.
In 2016, the Company determined that, for business reasons, it would terminate the North America partnership agreement with ALK-Abelló that included both Grastek and Ragwitek allergy immunotherapy tablets for sublingual use. This decision was not due to efficacy or safety concerns for the tablets. Merck provided ALK-Abelló with six months’ notice that it is terminating the agreement and therefore these compounds will be returned to ALK-Abelló. In connection with this decision, the Company wrote-off $95 million of intangible assets related to these products (see Note 7 to the consolidated financial statements).

Hospital and Specialty
Hepatitis
Global sales of Zepatier were $555 million in 2016. Zepatier was approved by the FDA in January 2016 for the treatment of adult patients with chronic HCV GT1 or GT4 infection, with ribavirin in certain patient populations. Zepatier was approved by the EC in July 2016 and became available in European markets in late November 2016. Launches are expected to continue across the EU in 2017. The Company is also launching Zepatier in Japan and in emerging markets.
Worldwide sales of PegIntron, a treatment for chronic HCV, declined 65% in 2016 to $63 million and decreased 52% in 2015 to $182 million. The declines were driven by lower volumes in nearly all regions as the availability of newer therapeutic options resulted in continued loss of market share.
Global sales of Victrelis, an oral medicine for the treatment of chronic HCV, were $18 million in 2015, a decline of 89% compared with sales of $153 million in 2014, driven by lower volumes in Europe and emerging markets as the availability of newer therapeutic options resulted in continued loss of market share. Sale of Victrelis were de minimis in 2016.
HIV
Worldwide sales of Isentress, an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1 infection, were $1.4 billion in 2016, a decline of 8% compared with 2015 including a 2% unfavorable effect from foreign exchange. The sales decline was driven primarily by lower volumes in the United States,States. The patent that provided U.S. market exclusivity for Invanz expired in November 2017 and generic competition began in the second half of 2018. The Company is experiencing a significant decline in U.S. Invanz sales as well as lower demanda result of this generic competition and pricingexpects the decline to continue. Worldwide sales of Invanz were $602 million in Europe due to competitive pressures, partially offset2017, an increase of 7% compared with 2016, driven primarily by a favorable adjustment to discount reserveshigher sales in the United States, andreflecting higher pricing that was partially offset by lower demand, as well as higher demand in certain emerging markets. Global sales of Brazil.Isentress were $1.5 billion in 2015, a decline of 10% compared with 2014 including an 8% unfavorable effect from foreign exchange. The decline was driven primarily by lower volumes in the United States and lower demand and

pricing in Europe due to competitive pressures, partially offset by higher volumes in Latin America and higher pricing in the United States.
Hospital Acute Care
Global sales of Cubicin, an I.V. antibiotic for complicated skin and skin structure infections or bacteremia when caused by designated susceptible organisms, were $1.1 billion$367 million in 2016,2018, a decline of 4% compared with 2015. The2017 including a 1% favorable effect from foreign exchange. Worldwide sales of Cubicin were $382 million in 2017, a decline of 65% compared with 2016, resulting from generic competition in the United States following expiration of the U.S. composition patent for Cubicin expired in June 2016 and the Company is experiencing a significant decline in U.S. Cubicin sales and expects the decline to continue. The sales decline in the United States was partially offset by sales of Cubicin in certain international markets for which the Company acquired marketing rights in the fourth quarter of 2015 (including Europe, Latin America, Australia, New Zealand, China, South Africa and certain other Asia Pacific countries). The Company anticipates it will lose market exclusivity for Cubicin in Europe in 2017.
Worldwide sales of Noxafil, for the prevention of invasive fungal infections, grew 22% in 2016 to $595 million driven primarily by higher pricing in the United States, volume growth in Europe reflecting an ongoing positive impact from the approval of new formulations, and higher demand in emerging markets. Global sales of Noxafil rose 21% in 2015 to $487 million driven by pricing and higher demand in the United States, as well as volume growth in Europe reflecting a positive impact from the approval of new formulations. Foreign exchange unfavorably affected global sales performance by 3% in 2016 and 12% in 2015.
Global sales of Invanz, for the treatment of certain infections, were $561 million in 2016, a decline of 1% compared with 2015 including a 2% unfavorable effect from foreign exchange. Sales performance in 2016 reflects volume growth in certain emerging markets and higher pricing in the United States, largely offset by a decline in Venezuela. Worldwide sales of Invanz were $569 million in 2015, an increase of 8% compared with 2014, reflecting higher sales in the United States and volume growth in emerging markets that was partially offset by a 9% unfavorable effect from foreign exchange. The Company will lose U.S. patent protection for Invanz in November 2017 and the Company anticipates a significant decline in U.S. Invanz sales thereafter. U.S. sales of Invanz were $329 million in 2016.
Global sales of Cancidas, an anti-fungal product sold primarily outside of the United States, were $558$326 million in 2016,2018, a decline of 3%23% compared with 2015, reflecting2017, and were $422 million in 2017, a 4% unfavorable effect from foreigndecline of 24% compared with 2016. Foreign exchange and pricingfavorably affected global sales performance by 2% in 2018. The sales declines in Europe that were offsetdriven primarily by higher volumesgeneric competition in certain emerging markets, particularly in China. Worldwide sales of Cancidas were $573 million in 2015, a decrease of 16% compared with 2014 reflecting a 12% unfavorable effect from foreign exchange and volume declines in certain emergingEuropean markets. The EU compound patent for Cancidas expiresexpired in April 2017 and2017. Accordingly, the Company anticipatesis experiencing a significant decline in Cancidas sales in thosethese European markets thereafter. and expects the decline to continue.
Immunology
Sales of CancidasSimponi, a once-monthly subcutaneous treatment for certain inflammatory diseases (marketed by the Company in Europe, Russia and Turkey), were $297$893 million in 2016.
Global sales2018, growth of 9% compared with 2017 including a 4% favorable effect from foreign exchange. Sales of BridionSimponi , for the reversal of two types of neuromuscular blocking agents used during surgery, were $482$819 million in 2016,2017, growth of 37%7% compared with 20152016 including a 2%1% favorable effect from foreign exchange. Sales growth reflects volume growth in most markets, including in the United States where itboth years was approved by the FDA in December 2015, partially offset by a decline in Venezuela due to reduced operations by the Company in this country. Sales of Bridion increased 4% in 2015 to $353 million driven by volume growthhigher demand in international markets. Foreign exchange unfavorably affected global sales performance by 19% in 2015.
In October 2016, Merck announced that the FDA approved Zinplava Injection 25 mg/mL. Zinplava is indicated to reduce recurrence of Clostridium difficile infection (CDI) in patients 18 years of age or older who are receiving antibacterial drug treatment of CDI and are at high risk for CDI recurrence. Zinplava became available in the United States in February 2017. Zinplava was approved by the EC in January 2017.Europe. The Company anticipates sales of ZinplavaSimponi will be availableunfavorably affected in future periods by the EU in March 2017.recent launch of biosimilars for a competing product.
Immunology
Sales of Remicade, a treatment for inflammatory diseases (marketed by the Company in Europe, Russia and Turkey), were $1.3 billion$582 million in 2016,2018, a decline of 29%31% compared with 2015,2017, and were $1.8 billion$837 million in 2015,2017, a decline of 24%34% compared with 2014.2016. Foreign exchange unfavorablyfavorably affected sales performance by 1%2% in 2016 and by 14% in 2015. In February 2015, the2018. The Company lost market exclusivity for Remicade in major European markets in 2015 and no longer has market exclusivity in any of its marketing territories. The Company is experiencing pricing and volume declines in these markets as a result of biosimilar competition and expects the declines to continue.

Virology
SalesWorldwide sales of SimponiIsentress/Isentress HD, an HIV integrase inhibitor for use in combination with other antiretroviral agents for the treatment of HIV-1 infection, were $1.1 billion in 2018, a decline of 5% compared with 2017, and were $1.2 billion in 2017, a decline of 13% compared with 2016. Foreign exchange favorably affected global sales performance by 1% in 2017. The sales declines primarily reflect competitive pressure in the United States and Europe.
In August 2018, the FDA approved two new HIV-1 medicines: Delstrigo, a once-monthly subcutaneousonce-daily fixed-dose combination tablet of doravirine, lamivudine and tenofovir disoproxil fumarate; and Pifeltro (doravirine), a new non-nucleoside reverse transcriptase inhibitor to be administered in combination with other antiretroviral medicines. Both Delstrigo and Pifeltro are indicated for the treatment of HIV-1 infection in adult patients with no prior antiretroviral treatment experience. Delstrigo and Pifeltro were also approved by the EC in November 2018. In January 2019, the FDA accepted for review supplemental New Drug Applications (NDA) for Pifeltro and Delstrigo seeking approval for

use in patients living with HIV-1 who are switching from a stable antiretroviral regimen and whose virus is suppressed. The Prescription Drug User Fee Act (PDUFA) date for the supplemental NDAs is September 20, 2019.
Global sales of Zepatier, a treatment for adult patients with certain inflammatory diseases (marketedtypes of chronic hepatitis C virus (HCV) infection, were $455 million in 2018, a decline of 73% compared with 2017. The sales decline was driven primarily by the unfavorable effects of increasing competition and declining patient volumes, particularly in the United States, Europe and Japan. The Company anticipates that sales of Zepatier in the future will continue to be adversely affected by competition and lower patient volumes. Worldwide sales of Zepatier were $1.7 billion in 2017 compared with $555 million in 2016. Sales growth in 2017 was driven primarily by higher sales in Europe, Russiathe United States and Turkey)Japan following product launch in 2016.
Cardiovascular
Combined global sales of Zetia (marketed in most countries outside the United States as Ezetrol), Vytorin (marketed outside the United States as Inegy), as well as Atozet and Rosuzet (both marketed in certain countries outside of the United States), medicines for lowering LDL cholesterol, were $766$1.8 billion in 2018, a decline of 26% compared with 2017 including a 3% favorable effect from foreign exchange. The sales decline was driven primarily by lower demand in the United States and Europe. Zetia and Vytorin lost market exclusivity in the United States in December 2016 and April 2017, respectively. Accordingly, the Company experienced a rapid and substantial decline in U.S. Zetia and Vytorin sales as a result of generic competition and has lost nearly all U.S. sales of these products. In addition, the Company lost market exclusivity in major European markets for Ezetrol in April 2018 and has also lost market exclusivity in certain European markets for Inegy (see Note 11 to the consolidated financial statements). Accordingly, the Company is experiencing significant sales declines in these markets as a result of generic competition and expects the declines to continue. These declines were partially offset by higher sales in Japan due in part to the launch of Atozet. Combined worldwide sales of the ezetimibe family were $2.4 billion in 2017, a decline of 39% compared with 2016. The sales decline was driven by lower volumes and pricing of Zetia and Vytorin in the United States as a result of generic competition due to the loss of U.S. market exclusivity as described above.
Pursuant to a collaboration with Bayer AG (Bayer) (see Note 4 to the consolidated financial statements), Merck has lead commercial rights for Adempas, a cardiovascular drug for the treatment of pulmonary arterial hypertension, in countries outside the Americas while Bayer has lead rights in the Americas, including the United States. The companies share profits equally under the collaboration. In 2016, Merck began promoting and distributing Adempas in Europe. Transition from Bayer in other Merck territories, including Japan, continued in 2017. Revenue from Adempas includes sales in Merck’s marketing territories, as well as Merck’s share of profits from the sale of Adempas in Bayer’s marketing territories. Merck recorded revenue related to Adempas of $329 million in 2016,2018, an increase of 11%10% compared with 20152017, reflecting higher sales in Merck’s marketing territories, partially offset by lower profit sharing from Bayer due in part to lower pricing in the United States. Revenue related to Adempas was $300 million in 2017, an increase of 78% compared with 2016, reflecting both higher sales in Merck’s marketing territories, as well as the recognition of higher profit sharing from Bayer. Foreign exchange favorably affected global sales performance by 3% in 2018 and by 1% in 2017.
Diabetes
Worldwide combined sales of Januvia and Janumet, medicines that help lower blood sugar levels in adults with type 2 diabetes, were $5.9 billion in 2018, essentially flat compared with 2017. Global combined sales of Januvia and Janumet were $5.9 billion in 2017, a decline of 3% compared with 2016. Foreign exchange favorably affected sales performance by 1% in both 2018 and 2017. Sales performance in both periods was driven primarily by ongoing pricing pressure, particularly in the United States, partially offset by higher demand in most international markets. The Company expects pricing pressure to continue.
Women’s Health 
Worldwide sales of NuvaRing, a vaginal contraceptive product, were $902 million in 2018, an increase of 19% compared with 2017 including a 3% unfavorable1% favorable effect from foreign exchange. Sales growth was driven primarily by higher volumes in Europe reflecting in part an ongoing positive impact from the ulcerative colitis indication. Sales of Simponi were $690 million in 2015, essentially flat as compared with 2014, driven by higher demand in Europe, reflecting in part an ongoing positive impact from the ulcerative colitis indication, which was offset by a 19% unfavorable effect from foreign exchange.
Oncology
Sales of Keytruda, an anti-PD-1 therapy, were $1.4 billion in 2016, $566 million in 2015 and $55 million in 2014. The year-over-year increases primarily reflect higher salespricing in the United States, EuropeStates. The patent that provided U.S. market exclusivity for NuvaRing expired in April 2018 and in emerging markets as the Company continues to launchanticipates a significant decline in U.S. Keytruda.
In October 2016, Merck announced that the FDA approved KeytrudaNuvaRing for the first-line treatmentsales in future periods as a result of patients with NSCLC whose tumors have high PD-L1 expression (TPS of 50% or more) as determined by an FDA-approved test, with no EGFR or ALK genomic tumor aberrations. With this new indication, Keytruda is now the only anti-PD-1 therapy to be approved in the first-line treatment setting for these patients. In addition, the FDA approved a labeling update to include data from KEYNOTE-010 in the second-line or greater treatment setting for patients with metastatic NSCLC whose tumors express PD-L1 (TPS of 1% or more) as determined by an FDA-approved test, with disease progression on or after platinum-containing chemotherapy. Patients with EGFR or ALK genomic tumor aberrations should have disease progression on FDA-approved therapy for these aberrations prior to receiving Keytruda. In December 2016, Keytruda was approved in Japan for the treatment of certain patients with PD-L1-positive unresectable advanced/recurrent NSCLC in the first- and second-line treatment settings. Additionally, in January 2017, the EC approved Keytruda for the first-line treatment of metastatic NSCLC in adults whose tumors have high PD-L1 expression (TPS of 50% or more) with no EGFR or ALK positive tumor mutations.
In August 2016, Merck announced that the FDA approved Keytruda for the treatment of patients with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) with disease progression on or after platinum-containing chemotherapy.
Keytruda is now approved in the United States and in the EU for the treatment of previously untreated metastatic NSCLC in patients whose tumors express high levels of PD-L1 and previously treated metastatic NSCLC in patients whose tumors express PD-L1, as well as for the treatment of advanced melanoma. Keytruda is also approved in the United States for previously treated recurrent or metastatic HNSCC. The Company has launched Keytruda in over 50 markets globally.
Merck has five sBLAs under Priority Review with the FDA for Keytruda including: for use in combination with chemotherapy for the first-line treatment of patients with metastatic or advanced non-squamous NSCLC regardless of PD-L1 expression and with no EGFR or ALK genomic tumor aberrations; for the treatment of patients with classical Hodgkin lymphoma; for the treatment of previously treated patients with advanced microsatellite instability-high cancer; for the first-line treatment of patients with locally advanced or metastatic urothelial cancer, including most bladder cancers; and for the second-line treatment of patients with locally advanced or metastatic urothelial cancer with disease progression on or after platinum-containing chemotherapy. The Company plans additional regulatory filings in the United States and other countries. The Keytruda clinical development program includes studies across a broad range of cancer types (see “Research and Development” below). In January 2017, Merck entered into a settlement and license agreement to resolve worldwide patent infringement litigation related to Keytruda (see Note 10 to the consolidated financial statements).
generic competition. Global sales of EmendNuvaRing, for the prevention of chemotherapy-induced and post-operative nausea and vomiting, were $549$761 million in 2016, an increase of 3% compared with 2015 including2017, a 1% unfavorable effect from foreign exchange, largely reflecting higher pricing in the United States, partially offset by volume declines in Japan. In February 2016, Merck announced that the FDA approved a supplemental new drug application for single-dose Emend for injection for the prevention of delayed nausea and vomiting in adults receiving initial and repeat courses of moderately emetogenic chemotherapy. Worldwide sales of Emend were $535 million in 2015, a decline of 3% reflecting a 6% unfavorable effect from foreign exchange that was partially offset by higher pricing in the United States and volume growth in Europe.

Diversified Brands
Merck’s diversified brands include human health pharmaceutical products that are approaching the expiration of their marketing exclusivity or are no longer protected by patents in developed markets, but continue to be a core part of the Company’s offering in other markets around the world.
Respiratory
Worldwide sales of Singulair, a once-a-day oral medicine for the chronic treatment of asthma and for the relief of symptoms of allergic rhinitis, were $915 million in 2016, a decrease of 2% compared with 20152016 including a 2%1% favorable effect from foreign exchange. Sales performance primarily reflects lower volumes in Japan. The patents that provided market exclusivity for Singulair in Japan expired in February and October of 2016.As a result, the Company is experiencing Singulair volume declines in Japan and expects the decline to continue. Singulair sales in Japan were $455 million in 2016. In years prior to 2016, the Company lost market exclusivity for Singulair in the United States and in most major international markets with the exception of Japan. The Company no longer has market exclusivity for Singulair in any major market. Global sales of Singulair were $931 million in 2015, a decline of 15% compared with 2014 including a 10% unfavorable effect from foreign exchange. The sales decline in 2015 was driven primarily by lower volumes in Japan and lower demand in Europe as a result of generic competition.
Global sales of Nasonex, an inhaled nasal corticosteroid for the treatment of nasal allergy symptoms, were $537 million in 2016, a decline of 37% compared with 2015, driven primarily by lower volumes in the United States resulting from generic competition. In March 2016, Apotex launched a generic version of Nasonex in the United States pursuant to a June 2012 U.S. District Court for the District of New Jersey ruling (upheld on appeal to the U.S. Court of Appeals for the Federal Circuit) holding that Apotex’s generic version of Nasonex does not infringe on the Company’s formulation patent. Accordingly, the Company is experiencing a substantial decline in U.S. Nasonex sales and expects the decline to continue. The decline in global Nasonex sales in 2016 was also driven by lower volumes and pricing in Europe from ongoing generic erosion and lower sales in Venezuela due to reduced operations by the Company in this country. Worldwide sales of Nasonex were $858 million in 2015, a decline of 22% compared with 2014 including a 6% unfavorable effect from foreign exchange. The decline was driven primarily by lower volumes in the United States reflecting competition from alternative generic treatment options, as well as from supply constraints. In addition, lower volumes and pricing in Europe from ongoing generic erosion also contributed to the Nasonex sales decline in 2015.
Other
Global sales of Cozaar and its companion agent Hyzaar (a combination of Cozaar and hydrochlorothiazide), treatments for hypertension, declined 23% in 2016 to $511 million and decreased 17% in 2015 to $667 million. Foreign exchange unfavorably affected global sales performance by 3% and 9% in 2016 and 2015, respectively. The patents that provided market exclusivity for Cozaar and Hyzaar in the United States and in most major international markets have expired. Accordingly, the Company is experiencing declines in Cozaar and Hyzaar sales and expects the declines to continue.
Vaccines
The following discussion of vaccines does not include sales of vaccines sold in most major European markets through SPMSD, the Company’s joint venture with Sanofi Pasteur (Sanofi), the results of which are reflected in equity income from affiliates included in Other (income) expense, net (see “Selected Joint Venture and Affiliate Information” below). Supply sales to SPMSD, however, are included. On December 31, 2016, Merck and Sanofi terminated SPMSD and ended their joint vaccines operations in Europe (see Note 8 to the consolidated financial statements). Beginning in 2017, Merck will record vaccine sales in the European markets that were previously part of the SPMSD joint venture.
Merck’s sales of Gardasil/Gardasil 9, vaccines to help prevent certain cancers and diseases caused by certain types of HPV, were $2.2 billion in 2016, growth of 14% compared with 2015. Sales growth was driven primarily by higher volumes and pricing in the United States, as well as higher demand in certain emerging markets that was partially offset by a decline in government tenders in Brazil. In October 2016, the FDA approved a 2-dose vaccination regimen for Gardasil 9, for use in girls and boys 9 through 14 years of age, and the U.S. Centers for Disease Control and Prevention’s Advisory Committee on Immunization Practices voted to recommend the 2-dose vaccination regimen for certain 9 through 14 year olds. The Company anticipates the 2-dose vaccination regimen will have an unfavorable effect on sales of Gardasil 9 during the period of transition. Merck’s sales of Gardasil/Gardasil 9 were $1.9 billion in 2015, an increase of 10% compared with 2014 including a 1% unfavorable effect from foreign exchange. Sales growth

was driven primarily by higher sales in the United States resulting from higher pricing and increased volumes reflecting the timing of public sector purchases, as well as increased government tenders in the Asia Pacific region, partially offset by declines in Latin America due to both price and volume. Gardasil 9, Merck’s 9-valent HPV vaccine, was approved by the FDA in December 2014 for use in females 9 through 26 years of age, and males 9 through 15 years of age. Gardasil 9 includes the greatest number of HPV types in any available HPV vaccine. In December 2015, the FDA approved an expanded age indication for Gardasil 9, to include use in males 16 through 26 years of age for the prevention of anal cancers, precancerous or dysplastic lesions and genital warts caused by certain HPV types. The Company is a party to certain third-party license agreements with respect to Gardasil/Gardasil 9 (including a cross-license and settlement agreement with GlaxoSmithKline). As a result of these agreements, the Company pays royalties on worldwide Gardasil/Gardasil 9 sales of 16% to 24% which vary by country and are included in Materials and production costs.
Merck’s sales of ProQuad, a pediatric combination vaccine to help protect against measles, mumps, rubella and varicella, were $495 million in 2016, $454 million in 2015 and $395 million in 2014. Sales growth in 2016 as compared with 2015 was driven primarily by higher demand and pricing in the United States. Sales growth in 2015 as compared with 2014 primarily reflects higher sales in the United States reflecting increasedlower volumes which were driven in part by measles outbreaks in the United States, as well as higher pricing.
Merck’s sales of M-M-R II, a vaccine to help protect against measles, mumps and rubella, were $353 million in 2016, $365 million in 2015 and $326 million in 2014. Sales performance in 2015 as compared with 2016 and 2014 was driven by higher demand resulting from measles outbreaks in the United States.
Merck’s sales of Varivax, a vaccine to help prevent chickenpox (varicella), were $792 million in 2016, $686 million in 2015 and $672 million in 2014. Sales growth in 2016 as compared with 2015 was driven primarily by higher sales in the United States reflecting the effects of public sector purchasing and higher pricing that were partially offset by lower demand. Volume growth in certain emerging markets reflecting the timing of government tenders also contributed to the sales increase in 2016 as compared with 2015. Sales growth in 2015 as compared with 2014 reflects higher volumes in certain emerging markets and higher pricing, in the United States, partially offset by lower volumes in the United States.
Merck’s sales of Zostavax, a vaccine to help prevent shingles (herpes zoster) in adults 50 years of age and older, were $685 million in 2016, a decline of 9% compared with 2015 including a 1% unfavorable effect from foreign exchange. The decline was driven primarily by lower volumes in the United States, partially offset by higher pricing in the United States and higher demand in certain emerging markets. Merck’s sales of Zostavax were $749 million in 2015, a decline of 2% compared with 2014 including a 2% unfavorable effect from foreign exchange. Sales performance in 2015 as compared with 2014 reflects lower volumes in the United States, partially offset by higher demand in Canada and higher pricing in the United States. The Company is continuing to educate U.S. customers on the broad managed care coverage for Zostavax and the process for obtaining reimbursement. Merck is continuing to launch Zostavax outside of the United States.
Merck’s sales of RotaTeq, a vaccine to help protect against rotavirus gastroenteritis in infants and children, were $652 million in 2016, an increase of 7% compared with 2015, and were $610 million in 2015, a decline of 7% compared with 2014 including a 3% unfavorable effect from foreign exchange. Sales performance in both periods was driven primarily by the effects of public sector purchasing in the United States. Volume growth in certain emerging markets also contributed to sales growth in 2016.
Merck’s sales of Pneumovax 23, a vaccine to help prevent pneumococcal disease, were $641 million in 2016, an increase of 18% compared with 2015, driven primarily by higher volumes and pricing in the United States and higher demand in certain emerging markets. Merck’s sales of Pneumovax 23 were $542 million in 2015, a decrease of 27% compared with 2014, driven primarily by lower demand in the United States and sales declines in emerging markets. Foreign exchange favorably affected sales performance by 1% in 2016 and unfavorably affected sales performance by 2% in 2015.Europe.
Other Segments
The Company’s other segments are the Animal Health, Healthcare Services and Alliances segments, which are not material for separate reporting. The Alliances segment includes revenue from AZLP until the termination of the Company’s relationship with AZLP on June 30, 2014 (see “Selected Joint Venture and Affiliate Information” below).

Prior to its disposition on October 1, 2014, the Company also had a Consumer Care segment which had sales of $1.5 billion in 2014.
Animal Health
Animal Health includes pharmaceutical and vaccine products for the prevention, treatment and control of disease in all major farm and companion animal species. Animal Health sales are affected by competition and the frequent introduction of generic products. WorldwideSegment
Global sales of Animal Health products were $3.5$4.2 billion in 2016, $3.3 billion in 20152018, an increase of 9% compared with 2017, reflecting growth from both in-line and $3.5 billion in 2014. Globalrecently launched companion animal and livestock products. Higher sales of Animal Healthcompanion animal products increased 4%reflect growth in 2016 compared with 2015 including a 4% unfavorable effect from foreign exchange. Sales growth primarily reflects volume growth across most species areas, particularlythe Bravecto line of products that kill fleas and ticks in productsdogs and cats for companion animals, driven primarily byup to 12 weeks, as well as higher sales of Bravecto, as well ascompanion animal vaccines. Growth in livestock products reflects higher sales of ruminant, poultry and swine products. Worldwide sales of Animal Health products declined 4%were $3.9 billion in 20152017, an increase of 11% compared with 2014 including a 13% unfavorable effect from foreign exchange. Sales performance in 2015 reflects volume growth in2016, primarily reflecting higher sales of companion animal products, largely driven primarilyby growth in Bravecto, reflecting both growth in the oral formulation and continued uptake in the topical formulation, which was launched in 2016. Animal Health sales growth in 2017 was also driven by higher sales of Bravecto, which began launching in Europeruminant, poultry and the United States in 2014, as well as volume growth in swine and aqua products.
In May 2016,December 2018, the Company received marketing approval from the European Medicines Agency (EMA) for Bravecto Spot-On Solution for cats and dogs, and in July 2016, the Company received approval in the United States to market the product under the tradename Bravecto Topical.
In July 2016, Merck announced it had executedsigned an agreement to acquire Antelliq, a controlling interestleader in Vallée, a leading privately held producer ofdigital animal health products in Brazilidentification, traceability and monitoring solutions (see Note 3 to the consolidated financial statements).
Costs, Expenses and Other
($ in millions)2016 Change 2015 Change 20142018 Change 2017 Change 2016
Materials and production$13,891
 -7 % $14,934
 -11 % $16,768
Marketing and administrative9,762
 -5 % 10,313
 -11 % 11,606
Cost of sales$13,509
 5 % $12,912
 -8 % $14,030
Selling, general and administrative10,102
  % 10,074
 1 % 10,017
Research and development10,124
 51 % 6,704
 -7 % 7,180
9,752
 -6 % 10,339
 1 % 10,261
Restructuring costs651
 5 % 619
 -39 % 1,013
632
 -19 % 776
 19 % 651
Other (income) expense, net720
 -53 % 1,527
 *
 (11,613)(402) -20 % (500) *
 189
$35,148
 3 % $34,097
 37 % $24,954
$33,593
  % $33,601
 -4 % $35,148
* Greater than 100% or greater..
Materials and ProductionCost of Sales
Materials and production costs were $13.9Cost of sales was $13.5 billion in 2016, $14.92018, $12.9 billion in 20152017 and $16.8$14.0 billion in 2014.2016. Costs in 2018 include a $423 million charge related to the termination of a collaboration agreement with Samsung Bioepis Co., Ltd. (Samsung) for insulin glargine (see Note 3 to the consolidated financial statements). Also in 2018, the Company recorded $188 million of cumulative amortization expense for amounts capitalized in connection with the recognition of liabilities for potential future milestone payments related to collaborations (see Note 4 to the consolidated financial statements). Cost of sales includes expenses for the amortization of intangible assets recorded in connection with business acquisitions which totaled $2.7 billion in 2018, $3.1 billion in 2017 and $3.7 billion in 2016, $4.7 billion in 2015 and $4.2 billion in 2014.2016. Costs in 2016, 20152017 and 20142016 also include intangible asset impairment charges of $347 million, $45$58 million and $1.1 billion,$347 million, respectively, related to marketed products and other intangibles recorded in connection with business acquisitions (see Note 78 to the consolidated financial statements). Costs in 2017 also include a $76 million intangible asset impairment charge related to a licensing agreement. The Company may recognize additional non-cash impairment charges in the future related to intangible assets that were measured at fair value and capitalized in connection with business acquisitions and such charges could be material. In addition, expenses for 2015 include $105 million of amortization of purchase accounting adjustments to Cubist’s inventories. Also included in materials and production costscost of sales are expenses associated with restructuring activities which amounted to $21 million, $138 million and $181 million $361 millionin 2018, 2017 and $482 million in 2016, 2015 and 2014, respectively, includingprimarily reflecting accelerated depreciation and asset write-offs related to the planned sale or closure of manufacturing facilities. Separation costs associated with manufacturing-related headcount reductions have been incurred and are reflected in Restructuring costs as discussed below.
Gross margin was 65.1%68.1% in 20162018 compared with 62.2%67.8% in 20152017 and 60.3%64.5% in 2014.2016. The improvementyear-over-year improvements in gross margin in 2016 as compared with 2015 was driven primarily byreflect a lower net impact from the amortization of intangible assets and purchase accounting adjustments to inventories, as well as intangible asset impairment charges andrelated to business acquisitions, as well as restructuring costs as noted above, which reduced gross margin by 6.3 percentage points in 2018, 8.3 percentage points in 2017 and 10.6 percentage points in 20162016. The gross margin improvement in 2018 compared with 13.2 percentage points in 2015. Lower inventory write-offs and2017 also reflects the favorable effects of foreign exchangeproduct mix and amortization of unfavorable manufacturing variances recorded in 2017, resulting in part from the June 2017 cyber-attack. The gross margin improvement in 2018 was partially offset by a charge associated with the termination of a collaboration agreement

with Samsung, as well as the unfavorable effects of pricing pressure and cumulative amortization expense for potential future milestone payments related to collaborations as noted above. The gross margin improvement in 2017 compared with 2016 also contributed toreflects the favorable effects of product mix. Manufacturing-related costs associated with the cyber-attack partially offset the gross margin improvement in 2016 as2017.
Selling, General and Administrative
Selling, general and administrative (SG&A) expenses were $10.1 billion in 2018, essentially flat compared with 2015. The gross margin improvement in 2015 as compared with 2014 was driven primarily by2017, reflecting higher administrative costs and the favorable effectsunfavorable effect of foreign exchange, offset by lower selling and lower inventory write-offs, as well

aspromotional expenses. SG&A expenses were $10.1 billion in 2017, an increase of 1% compared with 2016. Higher administrative costs, including costs associated with the net impactCompany operating its vaccines business in the European markets that were previously part of acquisitionsthe SPMSD joint venture, remediation costs related to the cyber-attack, and divestitures. The amortization of intangible assets and purchase accounting adjustmentshigher promotional expenses related to inventories, as well as theproduct launches, were partially offset by lower restructuring and intangible asset impairment charges noted above reduced gross margin by13.6 percentage points in 2014.
Marketing and Administrative
Marketing and administrative (M&A) expenses were $9.8 billion in 2016, a decline of 5% compared with 2015 driven largely by lower acquisition and divestiture-related costs, lower selling expenses and the favorable effectseffect of foreign exchange, lower administrative expenses, such as legal defense costs, as well as lower selling costs. Higher promotional spending largely related to product launches and higher restructuring costs partially offset the decline. Mexchange. SG&A expenses were $10.3 billion in 2015, a decline of 11% compared with 2014, largely reflecting the favorable effects of foreign exchange, the 2014 divestiture of MCC, additional expenses in 2014 related to the health care reform fee as discussed below, lower restructuring costs, as well as lower selling costs, partially offset by higher promotional spending largely related to product launches, higher costs related to the January acquisition of Cubist, and higher acquisition and divestiture-related costs. M&A expenses include acquisition and divestiture-related costs of $78 million, $436 million and $234 million in 2016 2015 and 2014, respectively, consisting of integration, transaction, and certain other costs related to business acquisitions, including severance costs which are not part of the Company’s formal restructuring programs, as well as transaction and certain other costs related to divestitures of businesses. Acquisition and divestiture-related costs in 2015 include costs related to the acquisition of Cubist (see Note 3 to the consolidated financial statements). M&A expenses for 2016, 2015 and 2014 also include restructuring costs of $95 million $78 million and $200 million, respectively, related primarily to accelerated depreciation for facilities to be closed or divested. Separation costs associated with sales force reductions have been incurred and are reflected in Restructuring costs as discussed below.
On July 28, 2014, the Internal Revenue Service (IRS) issued final regulations on the annual non-tax deductible health care reform fee imposed by the Patient Protection SG&A expenses also include acquisition and Affordable Care Act that is based on an allocationdivestiture-related costs of a company’s market share$32 million, $44 million and $78 million in 2018, 2017 and 2016, respectively, consisting of prior year branded pharmaceutical salesintegration, transaction, and certain other costs related to certain government programs. The final IRS regulations accelerated the recognition criteria for the fee obligation by one year to the year in which the underlying sales used to allocate the fee occurred rather than the year in which the fee was paid. As a result of this change, Merck recorded an additional year of expense of $193 million during 2014.business acquisitions and divestitures.
Research and Development
Research and development (R&D) expenses were $10.1$9.8 billion in 20162018, a decline of 6% compared with $6.7 billion2017. The decrease primarily reflects lower expenses in 2015. The increase was driven primarily by higher acquired2018 for upfront and license option payments related to the formation of oncology collaborations, lower in-process research and development (IPR&D) impairment charges, increased clinical development spending, higher restructuring and licensing costs, partially offset by a reduction in expenses associated with a decrease in the estimated fair value measurement of liabilities for contingent consideration, partially offset by higher clinical development spending and investment in discovery and early drug development, as well as byhigher expenses related to other business development activities, including a charge in 2018 for the favorable effectsacquisition of foreign exchange.Viralytics. R&D expenses were $6.7$10.3 billion in 2015, a decline2017, an increase of 7%1% compared with 2014,2016. The increase was driven primarily by a charge in 2017 related to the favorable effectsformation of foreign exchange, expenses recognizeda collaboration with AstraZeneca, an unfavorable effect from changes in 2014 to increase the estimated fair value measurement of liabilities for contingent consideration, lower restructuring costs, a charge in 2014 related to a collaboration with Bayer AG (Bayer), and the 2014 divestiture of MCC, partially offset by the acquisition of Cubist, higher licensing costs and higher clinical development spending, in 2015.largely offset by lower IPR&D impairment charges and lower restructuring costs.
R&D expenses are comprised of the costs directly incurred by Merck Research Laboratories (MRL), the Company’s research and development division that focuses on human health-related activities, which were approximately $4.3$5.1 billion in 2016, $4.02018, $4.6 billion in 20152017 and $3.7$4.4 billion in 2014.2016. Also included in R&D expenses are costs incurred by other divisions in support of R&D activities, including depreciation, production and general and administrative, as well as licensing activity, and certain costs from operating segments, including the Pharmaceutical and Animal Health segments, which in the aggregate were $2.5$2.8 billion, $2.9 billion and $2.6 billion for 2018, 2017 and $2.82016, respectively. Additionally, R&D expenses in 2018 include a $1.4 billion charge related to the formation of a collaboration with Eisai (see Note 4 to the consolidated financial statements), as well as a $344 million charge for 2016, 2015 and 2014, respectively.the acquisition of Viralytics (see Note 3 to the consolidated financial statements). R&D expenses in 2017 include a $2.35 billion charge related to the formation of a collaboration with AstraZeneca (see Note 4 to the consolidated financial statements). R&D expenses also include IPR&D impairment charges of $152 million, $483 million and $3.6 billion $63 millionin 2018, 2017 and $49 million in 2016, 2015 and 2014, respectively (see “Research and Development” below)Note 8 to the consolidated financial statements). The Company may recognize additional non-cash impairment charges in the future related to the cancellation or delay of other pipeline programs that were measured at fair value and capitalized in connection with business acquisitions and such charges could be material. In addition, R&D expenses include expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration recorded in connection with acquisitions. During 20162018 and 2015,2016, the Company recorded a net reduction in expenses of $402$54 million and $24$402 million, respectively, to decrease the estimated fair value of liabilities for contingent consideration related to the discontinuation or delay of certain programs (see Note 36 to the consolidated financial statements). During 2014,2017, the Company recorded a chargecharges of $316$27 million to

increase the estimated fair value of liabilities for contingent consideration. R&D expenses in 2016 2015 and 2014 also reflect $142 million $52 million and $283 million, respectively, of accelerated depreciation and asset abandonment costs associated with restructuring activities.

Restructuring Costs
The Company incurs substantial costs for restructuring program activities related to Merck’s productivity and cost reduction initiatives, as well as in connection with the integration of certain acquired businesses. In 2010 and 2013, the Company commenced actions under global restructuring programs designed to streamline its cost structure. The actions under these programs include the elimination of positions in sales, administrative and headquarters organizations, as well as the sale or closure of certain manufacturing and research and development sites and the consolidation of office facilities. The Company also continues to reduce its global real estate footprint and improve the efficiency of its manufacturing and supply network. The non-facility related restructuring actions under these programs are substantially complete; the remaining activities primarily relate to ongoing facility rationalizations.
Restructuring costs, primarily representing separation and other related costs associated with these restructuring activities, were $632 million, $776 million and $651 million $619 millionin 2018, 2017 and $1.0 billion in 2016, 2015 and 2014, respectively. In 2016, 20152018, 2017 and 2014,2016, separation costs of $216$473 million, $208$552 million and $674$216 million, respectively, were incurred associated with actual headcount reductions, as well as estimated expenses under existing severance programs for headcount reductions that were probable and could be reasonably estimated. Merck eliminated approximately 2,160 positions in 2018, 2,450 positions in 2017 and 2,625 positions in 2016 3,770 positions in 2015 and 6,085 positions in 2014 related to these restructuring activities. These position eliminations are comprised of actual headcount reductions, and the elimination of contractors and vacant positions. Also included in restructuring costs are asset abandonment, shut-down and other related costs, as well as employee-related costs such as curtailment, settlement and termination charges associated with pension and other postretirement benefit plans and share-based compensation plan costs. For segment reporting, restructuring costs are unallocated expenses.
Additional costs associated with the Company’s restructuring activities are included in Materials and productionCost of sales, MarketingSelling, general and administrative and Research and development as discussed above. The Company recorded aggregate pretax costs of $658 million in 2018, $927 million in 2017 and $1.1 billion in 2016 $1.1 billion in 2015 and $2.0 billion in 2014 related to restructuring program activities (see Note 45 to the consolidated financial statements). The Company expects tohas substantially completecompleted the remaining actions under the programs by the end of 2017 and incur approximately $700 million of additional pretax costs.these programs.
Other (Income) Expense, Net
Other (income) expense, net, was $720$402 million of income in 2018, $500 million of income in 2017 and $189 million of expense in 2016, $1.5 billion of expense in 2015 and $11.6 billion of income in 2014.2016. For details on the components of Other (income) expense, net,, see Note 1415 to the consolidated financial statements.
Segment Profits          
($ in millions)2016 2015 20142018 2017 2016
Pharmaceutical segment profits$22,180
 $21,658
 $22,164
$24,292
 $22,495
 $22,141
Animal Health segment profits1,659
 1,552
 1,357
Other non-reportable segment profits1,507
 1,573
 2,386
103
 275
 146
Other(19,028) (17,830) (7,267)(17,353)
(17,801)
(18,985)
Income before income taxes$4,659
 $5,401
 $17,283
Income before taxes$8,701
 $6,521
 $4,659
SegmentPharmaceutical segment profits are comprised of segment sales less standard costs, certain operatingas well as SG&A and R&D expenses directly incurred by the segment. Animal Health segment componentsprofits are comprised of equity income or loss from affiliatessegment sales, less all cost of sales, as well as SG&A and certain depreciation and amortization expenses.R&D expenses directly incurred by the segment. For internal management reporting presented to the chief operating decision maker, Merck does not allocate materials and production costs, other than standard costs, the majorityremaining cost of sales not included in segment profits as described above, research and development expenses incurred in MRL, or general and administrative expenses, nor the cost of financing these activities. Separate divisions maintain responsibility for monitoring and managing these costs, including depreciation related to fixed assets utilized by these divisions and, therefore, they are not included in segment profits. Also excluded from the determination of segment profits are acquisition and divestiture-related costs including the amortization(amortization of purchase accounting adjustments, and intangible asset impairment charges and expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration), restructuring costs, taxes paid at the joint venture level and a portion of equity income. Additionally, segment profits do not reflect other expenses from corporate and manufacturing cost centers and other

miscellaneous income or expense. These unallocated items, including a charge related to the termination of a collaboration agreement with Samsung for insulin glargine in 2018, a loss on the extinguishment of debt in 2017, and a charge related to the settlement of worldwide Keytruda patent litigation and gains on divestitures a net charge related to the settlement of Vioxx shareholder class action litigation, the gain on AstraZeneca’s option exercise, foreign exchange losses related to the devaluation of the Company’s net monetary assets in Venezuela, the loss on extinguishment of debt and an additional year of expense related to the health care reform fee,2016, are reflected in “Other” in the above table. Also included in “Other” are miscellaneous corporate profits (losses), as well as operating profits (losses) related to third-party manufacturing sales. In the first quarter of 2018, the Company adopted a new accounting standard related to the classification of certain defined benefit plan costs, which resulted in a change to the measurement of segment profits (see Note 19 to the consolidated financial statements). Prior period amounts have been recast to conform to the new presentation.

Pharmaceutical segment profits grew 8% in 2018 compared with 2017 primarily reflecting higher sales and lower selling and promotional costs. Pharmaceutical segment profits grew 2% in 20162017 compared with 20152016 primarily reflecting higher sales. Pharmaceuticalsales and the favorable effects of product mix. Animal Health segment profits declined 2%grew 7% in 2015 compared with 20142018 and 14% in 2017 driven primarily reflecting the unfavorable effects of foreign exchange.by higher sales, partially offset by increased selling and promotional costs.
Taxes on Income
The effective income tax rates of 28.8% in 2018, 62.9% in 2017 and 15.4% in 2016 17.4% in 2015 and 30.9% in 2014 reflect the impacts of acquisition and divestiture-related costs, which in 2016 include $3.6 billion of IPR&D impairment charges, as well as restructuring costs and the beneficial impact of foreign earnings. The effective income tax rate in 2018 includes measurement-period adjustments to the provisional amounts recorded in 2017 associated with the enactment of U.S. tax legislation known as the Tax Cuts and Jobs Act (TCJA), including $124 million related to the transition tax (see Note 16 to the consolidated financial statements). In addition, the effective income tax rate for 20152018 reflects the unfavorable impacts of a $1.4 billion pretax charge recorded in connection with the formation of a collaboration with Eisai and a $423 million pretax charge related to the termination of a collaboration agreement with Samsung for which no tax benefits were recognized. The effective income tax rate for 2017 includes a provisional net charge of $2.6 billion related to the enactment of the TCJA. The effective income tax rate for 2017 also reflects the unfavorable impact of a $2.35 billion pretax charge recorded in connection with the formation of a collaboration with AstraZeneca for which no tax benefit was recognized, partially offset by the favorable impact of a net tax benefit of $410$234 million related to the settlement of certain federal income tax issues (see Note 16 to the impactconsolidated financial statements), and a benefit of the net charge$88 million related to the settlement of a state income tax issue.
Net (Loss) Income Attributable to Noncontrolling Interests
Net (loss) income attributable to noncontrolling interests was Vioxx$(27) million shareholder class action litigation being fully deductible at combined U.S. federalin 2018 compared with $24 million in 2017 and state tax rates and$21 million in 2016. The loss in 2018 primarily reflects the favorable impactportion of tax legislation enactedgoodwill impairment charges related to certain business in the fourth quarter of 2015, as well as the unfavorable effect of non-tax deductible foreign exchange losses relatedHealthcare Services segment that are attributable to Venezuela (see Note 14 to the consolidated financial statements). The effective income tax rate for 2014 reflects the impact of the gain on the divestiture of MCC being taxed at combined U.S. federal and state tax rates. In addition, the effective income tax rate for 2014 includes a net tax benefit of $517 million recorded in connection with AstraZeneca’s option exercise (see Note 8 to the consolidated financial statements) and a benefit of approximately $300 million associated with a capital loss generated in connection with the sale of Sirna (see Note 3 to the consolidated financial statements). The effective income tax rate for 2014 also includes the unfavorable impact of an additional year of expense for the non-tax deductible health care reform fee that the Company recorded in accordance with final regulations issued by the IRS.noncontrolling interests.
The Company is under examination by numerous tax authorities in various jurisdictions globally. The ultimate finalization of the Company’s examinations with relevant taxing authorities can include formal administrative and legal proceedings, which could have a significant impact on the timing of the reversal of unrecognized tax benefits. The Company believes that its reserves for uncertain tax positions are adequate to cover existing risks or exposures. However, there is one item that is currently under discussion with the IRS relating to the 2006 through 2008 examination. The Company has concluded that its position should be sustained upon audit. However, if this item were to result in an unfavorable outcome or settlement, it could have a material adverse impact on the Company’s financial position, liquidity and results of operations.
Net Income and Earnings per Common Share
Net income attributable to Merck & Co., Inc. was $6.2 billion in 2018, $2.4 billion in 2017 and $3.9 billion in 2016, $4.4 billion in 2015 and $11.9 billion in 2014.2016. EPS was $2.32 in 2018, $0.87 in 2017 and $1.41 in 2016, $1.56 in 2015 and $4.07 in 2014.2016.
Non-GAAP Income and Non-GAAP EPS
Non-GAAP income and non-GAAP EPS are alternative views of the Company’s performance that Merck is providing because management believes this information enhances investors’ understanding of the Company’s results as it permits investors to understand how management assesses performance. Non-GAAP income and non-GAAP EPS exclude certain items because of the nature of these items and the impact that they have on the analysis of underlying business performance and trends. The excluded items (which should not be considered non-recurring) consist of acquisition and divestiture-related costs, restructuring costs and certain other items. These excluded items are significant components in understanding and assessing financial performance.
Non-GAAP income and non-GAAP EPS are important internal measures for the Company. Senior management receives a monthly analysis of operating results that includes non-GAAP EPS. Management uses these measures internally for planning and forecasting purposes and to measure the performance of the Company along with other metrics. Senior management’s annual compensation is derived in part using non-GAAP income and non-GAAP EPS. Since non-GAAP income and non-GAAP EPS are not measures determined in accordance with GAAP, they have no standardized meaning prescribed by GAAP and, therefore, may not be comparable to the calculation of

similar measures of other companies. The information on non-GAAP income and non-GAAP EPS should be considered in addition to, but not as a substitute for or superior to, net income and EPS prepared in accordance with generally accepted accounting principles in the United States (GAAP).

A reconciliation between GAAP financial measures and non-GAAP financial measures is as follows:
($ in millions except per share amounts)2016 2015 2014
Pretax income as reported under GAAP$4,659
 $5,401
 $17,283
Increase (decrease) for excluded items:     
Acquisition and divestiture-related costs7,312
 5,398
 5,946
Restructuring costs1,069
 1,110
 1,978
Other items:     
Charge related to the settlement of worldwide Keytruda patent litigation
625
 
 
Foreign currency devaluation related to Venezuela
 876
 
Net charge related to the settlement of Vioxx shareholder class action litigation

 680
 
Gain on sale of certain migraine clinical development programs
 (250) 
Gain on divestiture of certain ophthalmic products
 (147) (480)
Gain on divestiture of Merck Consumer Care
 
 (11,209)
Gain on AstraZeneca option exercise
 
 (741)
Loss on extinguishment of debt
 
 628
Additional year of expense for health care reform fee
 
 193
Other(67) (34) (9)
 13,598
 13,034
 13,589
Taxes on income as reported under GAAP718
 942
 5,349
Estimated tax benefit (provision) on excluded items (1)
2,321
 1,470
 (2,345)
Net tax benefits from the settlements of federal income tax issues
 410
 
Tax benefits related to sale of Sirna Therapeutics, Inc. subsidiary
 
 300
 3,039
 2,822
 3,304
Non-GAAP net income10,559
 10,212
 10,285
Less: Net income attributable to noncontrolling interests as reported under GAAP21
 17
 14
Acquisition and divestiture-related costs attributable to non-controlling interests
 
 56
 21
 17
 70
Non-GAAP net income attributable to Merck & Co., Inc.$10,538
 $10,195
 $10,215
EPS assuming dilution as reported under GAAP$1.41
 $1.56
 $4.07
EPS difference (2)
2.37
 2.03
 (0.58)
Non-GAAP EPS assuming dilution$3.78
 $3.59
 $3.49
($ in millions except per share amounts)2018 2017 2016
Income before taxes as reported under GAAP$8,701
 $6,521
 $4,659
Increase (decrease) for excluded items:     
Acquisition and divestiture-related costs3,066
 3,760
 7,312
Restructuring costs658
 927
 1,069
Other items:     
Charge related to the formation of an oncology collaboration with Eisai1,400
 
 
Charge related to the termination of a collaboration with Samsung423
 
 
Charge for the acquisition of Viralytics344
 
 
Charge related to the formation of an oncology collaboration with AstraZeneca
 2,350
 
Charge related to the settlement of worldwide Keytruda patent litigation

 
 625
Other(57) (16) (67)
Non-GAAP income before taxes14,535
 13,542
 13,598
Taxes on income as reported under GAAP2,508
 4,103
 718
Estimated tax benefit on excluded items (1)
535
 785
 2,321
Net tax charge related to the enactment of the TCJA (2)
(160) (2,625) 
Net tax benefit from the settlement of certain federal income tax issues
 234
 
Tax benefit related to the settlement of a state income tax issue
 88
 
Non-GAAP taxes on income2,883

2,585

3,039
Non-GAAP net income11,652
 10,957
 10,559
Less: Net (loss) income attributable to noncontrolling interests as reported under GAAP(27) 24
 21
Acquisition and divestiture-related costs attributable to noncontrolling interests(58) 
 
Non-GAAP net income attributable to noncontrolling interests31

24

21
Non-GAAP net income attributable to Merck & Co., Inc.$11,621

$10,933

$10,538
EPS assuming dilution as reported under GAAP$2.32
 $0.87
 $1.41
EPS difference (3)
2.02
 3.11
 2.37
Non-GAAP EPS assuming dilution$4.34
 $3.98
 $3.78
(1) 
The estimated tax impact on the excluded items is determined by applying the statutory rate of the originating territory of the non-GAAP adjustments. Amount for 2014 includes a net benefit of $517 million recorded in connection with AstraZeneca’s option exercise.
(2) Amount in 2017 was provisional (see Note 16 to the consolidated financial statements).
(2)(3) 
Represents the difference between calculated GAAP EPS and calculated non-GAAP EPS, which may be different than the amount calculated by dividing the impact of the excluded items by the weighted-average shares for the applicable year.
Acquisition and Divestiture-Related Costs
Non-GAAP income and non-GAAP EPS exclude the impact of certain amounts recorded in connection with business acquisitions and divestitures. These amounts include the amortization of intangible assets and amortization of purchase accounting adjustments to inventories, as well as intangible asset impairment charges and expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration. Also excluded are integration, transaction, and certain other costs associated with business acquisitions including severance costs which are not part

of the Company’s formal restructuring programs, as well as transaction and certain other costs associated with divestitures of businesses.divestitures.
Restructuring Costs
Non-GAAP income and non-GAAP EPS exclude costs related to restructuring actions (see Note 45 to the consolidated financial statements). These amounts include employee separation costs and accelerated depreciation associated with facilities to be closed or divested. Accelerated depreciation costs represent the difference between the depreciation expense to be recognized over the revised useful life of the asset, based upon the anticipated date the site will be closed or divested or the equipment disposed of, and depreciation expense as determined utilizing the useful

life prior to the restructuring actions. Restructuring costs also include asset abandonment, shut-down and other related costs, as well as employee-related costs such as curtailment, settlement and termination charges associated with pension and other postretirement benefit plans and share-based compensation costs.
Certain Other Items
Non-GAAP income and non-GAAP EPS exclude certain other items. These items are adjusted for after evaluating them on an individual basis, considering their quantitative and qualitative aspects, and typically consist of items that are unusual in nature, significant to the results of a particular period or not indicative of future operating results. Excluded from non-GAAP income and non-GAAP EPS in 20162018 is a charge to settle worldwide patent litigation related to Keytrudathe formation of a collaboration with Eisai (see Note 104 to the consolidated financial statements), a charge related to the termination of a collaboration agreement with Samsung for insulin glargine (see Note 3 to the consolidated financial statements), a charge for the acquisition of Viralytics (see Note 3 to the consolidated financial statements), and measurement-period adjustments related to the provisional amounts recorded for the TCJA (see Note 16 to the consolidated financial statements). Excluded from non-GAAP income and non-GAAP EPS in 2015 are foreign exchange losses related to the devaluation of the Company’s net monetary assets in Venezuela (see Note 14 to the consolidated financial statements),2017 is a net charge related to the settlementformation of Vioxx shareholder class action litigationa collaboration with AstraZeneca (see Note 10 to the consolidated financial statements), a gain on the sale of certain migraine clinical development programs (see Note 3 to the consolidated financial statements), a gain on the divestiture of the Company’s remaining ophthalmics business in international markets (see Note 34 to the consolidated financial statements), as well as a provisional net tax charge related to the enactment of the TCJA, a net tax benefit related to the settlement of certain federal income tax issues and a tax benefit related to the settlement of a state income tax issue (see Note 1516 to the consolidated financial statements). Excluded from non-GAAP income and non-GAAP EPS in 2014 are certain gains, including2016 is a gain on the divestiture of MCC (see Note 3charge to the consolidated financial statements), a gain recognized in conjunction with AstraZeneca’s option exercise, including a related net tax benefit on the transaction (see Note 8 to the consolidated financial statements), a gain on the divestiture of certain ophthalmic products in several international markets (see Note 3 to the consolidated financial statements), as well as a loss on extinguishment of debt (see Note 9 to the consolidated financial statements), an additional year of expensesettle worldwide patent litigation related to the health care reform fee as discussed above, and tax benefits from the sale of the Company’s Sirna Therapeutics, Inc. (Sirna) subsidiary (see Note 3 to the consolidated financial statements)Keytruda.
Research and Development
A chart reflecting the Company’s current research pipeline as of February 24, 201722, 2019 is set forth in Item 1. “Business — Research and Development” above.

Research and Development Update
The Company currently has several candidates under regulatory review in the United States.States and internationally.
Keytruda is an FDA-approvedapproved anti-PD-1 therapy in clinical development for expanded indications in different cancer types.Keytruda is currently approved for the treatment of NSCLC, melanoma, advanced melanoma, and head and neck cancer (see “Pharmaceutical Segment” above).
In February 2017,2019, the FDA accepted and granted Priority Review for review two sBLAsa supplemental BLA for Keytruda in combination with Inlyta (axitinib), a tyrosine kinase inhibitor, for the first-line treatment of patients with advanced renal cell carcinoma. This supplemental BLA is based on findings from the Phase 3 KEYNOTE-426 trial, which demonstrated that Keytruda in combination with axitinib, as compared to sunitinib, significantly improved overall survival (OS) and PFS in the first-line treatment of advanced renal cell carcinoma. These data were presented at the American Society for Clinical Oncology (ASCO) Genitourinary Cancers Symposium in February 2019. The supplemental BLA also included supporting data from the Phase 1b KEYNOTE-035 trial. The FDA set a PDUFA date of June 20, 2019. Merck has filed data from KEYNOTE-426 with regulatory authorities worldwide.
In February 2019, the Committee for Medicinal Products for Human Use of the European Medicines Agency (EMA) adopted a positive opinion recommending Keytruda, in combination with carboplatin and either paclitaxel or nab-paclitaxel, for the first-line treatment of metastatic squamous NSCLC in adults. This recommendation is based on results from the pivotal Phase 3 KEYNOTE-407 trial, which enrolled patients regardless of PD-L1 tumor expression status. The trial showed a significant improvement in OS and PFS for patients taking Keytruda in combination with chemotherapy (carboplatin and either paclitaxel or nab-paclitaxel) compared with chemotherapy alone. If approved, this would mark the first approval in Europe for an anti-PD-1 therapy in combination with chemotherapy for adults with metastatic squamous NSCLC. In October 2018, the FDA approved Keytruda in combination with carboplatin-paclitaxel or nab-paclitaxel as a first-line treatment for metastatic squamous NSCLC, regardless of PD-L1 expression.
In December 2018, the FDA extended the action date for the supplemental BLA seeking approval for Keytruda as monotherapy for the first-line treatment of locally advanced or metastatic urothelial cancer, including most bladder cancers.NSCLC in patients whose tumors express PD-L1 (TPS ≥1%) without EGFR or ALK genomic tumor aberrations. The application for first-line use wassupplemental BLA is based on results of the Phase 3 KEYNOTE-042 trial where Keytruda monotherapy demonstrated a significant improvement in OS compared with chemotherapy in this patient population. The Company submitted additional data and analyses to

the FDA, which constituted a major amendment and extended the PDUFA date by three months to April 11, 2019. Merck continues to work closely with the FDA during the review of this supplemental BLA.
In February 2019, the FDA accepted and granted Priority Review for the treatment of these patients who are ineligiblea supplemental BLA for cisplatin-containing therapy. The application for second-line use was granted Priority Review for these patients with disease progression on or after platinum-containing chemotherapy. The Prescription Drug User Fee Act (PDUFA) action date for both applications is June 14, 2017. The FDA previously granted Breakthrough Therapy designation to Keytruda as monotherapy for the second-line treatment of patients with locally advanced SCLC whose disease has progressed after two or more lines of prior therapy. This supplemental BLA, which is seeking accelerated approval for this new indication, is based on data from the SCLC cohorts of the Phase 2 KEYNOTE-158 and Phase 1b KEYNOTE-028 trials. The FDA set a PDUFA date of June 17, 2019. Keytruda is also being studied in combination with chemotherapy in the ongoing Phase 3 KEYNOTE-604 study in patients with newly diagnosed extensive stage SCLC.
In February 2019, the FDA accepted a supplemental BLA for Keytruda as monotherapy or in combination with platinum and 5-fluorouracil chemotherapy for the first-line treatment of patients with recurrent or metastatic urothelial cancerHNSCC. This supplemental BLA is based in part on data from the pivotal Phase 3 KEYNOTE-048 trial where Keytruda demonstrated a significant improvement in OS compared with the standard of care, as monotherapy in patients whose tumors expressed PD-L1 with Combined Positive Score (CPS)≥20 and CPS≥1 and in combination with chemotherapy in the total patient population. These data were presented at the European Society for Medical Oncology (ESMO) 2018 Congress. The FDA granted Priority Review to the supplemental BLA and set a PDUFA date of June 10, 2019. KEYNOTE-048 also serves as the confirmatory trial for KEYNOTE-012, a Phase 1b study which supported the previous accelerated approval for Keytruda as monotherapy for the treatment of patients with recurrent or metastatic HNSCC with disease progression on or after platinum-containing chemotherapy.
In January 2017,November 2018, Merck announced that the FDA accepted for review an sBLA forPhase 3 KEYNOTE-181 trial investigating Keytruda plus chemotherapy (pemetrexed plus carboplatin) foras monotherapy in the first-linesecond-line treatment of advanced or metastatic esophageal or esophagogastric junction carcinoma met a primary endpoint of OS in patients with metastatic or advanced non-squamous NSCLC regardless of

whose tumors expressed PD-L1 expression and(CPS ≥10). In this pivotal study, treatment with no EGFR or ALK genomic tumor aberrations. This is the first application for regulatory approval of Keytruda resulted in combination with another treatment. The FDA granted Priority Review with a PDUFA action date of May 10, 2017. The sBLA will be reviewed under the FDA’s Accelerated Approval program.
In December 2016, the FDA accepted for review an sBLA for Keytruda for the treatment ofstatistically significant improvement in OS compared to chemotherapy (paclitaxel, docetaxel or irinotecan) in patients with refractory classical Hodgkin lymphoma or for patients who have relapsed after three or more prior linesCPS ≥10, regardless of therapy.histology. The FDA granted Priority Review with a PDUFA action dateprimary endpoint of March 15, 2017. The sBLA will be reviewed under the FDA’s Accelerated Approval program.
In November 2016, the FDA accepted for review an sBLA for Keytruda for the treatment of previously treatedOS was also evaluated in patients with advanced microsatellite instability-high (MSI-H) cancer. The FDA granted Priority Review with a PDUFA action datesquamous cell histology and in the entire intention-to-treat study population. While directionally favorable, statistical significance for OS was not met in these two patient groups. Per the statistical analysis plan, the key secondary endpoints of March 8, 2017. The sBLA will be reviewed underPFS and objective response rate (ORR) were not formally tested, as OS was not reached in the FDA’s Accelerated Approval program. The FDA recently granted Breakthrough Therapy designation to Keytrudafull intention-to-treat study population. These results were presented in January 2019 at the ASCO Gastrointestinal Cancers Symposium and have been submitted for unresectable or metastatic MSI-H non-colorectal cancer, and previously granted it for the treatment of patients with unresectable or metastatic MSI-H colorectal cancer.regulatory review.
Additionally, Keytruda has also received Breakthrough Therapy designation from the FDA for the treatment of patientshigh-risk early-stage triple-negative breast cancer in combination with primary mediastinal B-cell lymphoma that is refractory to or has relapsed after two prior lines of therapy.
neoadjuvant chemotherapy. The FDA’s Breakthrough Therapy designation is intended to expedite the development and review of a candidate that is planned for use, alone or in combination, to treat a serious or life-threatening disease or condition when preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints.
In October 2018, Merck announced the first presentation of results from an interim analysis of KEYNOTE-057, a Phase 2 trial evaluating Keytruda for previously treated patients with high-risk non-muscle invasive bladder cancer. An interim analysis of the study’s primary endpoint showed a complete response rate of nearly 40% at three months with Keytruda in patients whose disease was unresponsive to Bacillus Calmette-Guérin therapy, the current standard of care for this disease, and who were ineligible for or who refused to undergo radical cystectomy. These results, as well as other study findings, were presented at the ESMO 2018 Congress.
In February 2019, Merck announced that the pivotal Phase 3 KEYNOTE-240 trial evaluating Keytruda, plus best supportive care, for the treatment of patients with advanced hepatocellular carcinoma who were previously treated with systemic therapy, did not meet its co-primary endpoints of OS and PFS compared with placebo plus best supportive care. In the final analysis of the study, there was an improvement in OS for patients treated with Keytruda compared to placebo, however these OS results did not meet statistical significance per the pre-specified statistical plan. Results for PFS were also directionally favorable in the Keytruda arm compared with placebo but did not reach statistical significance. The key secondary endpoint of ORR was not formally tested, since superiority was not reached for OS or PFS. Results will be presented at an upcoming medical meeting and have been shared with the FDA for discussion.

The Keytruda clinical development program consists of more than 400900 clinical trials, including more than 200600 trials that combine Keytruda with other cancer treatments. These studies encompass more than 30 cancer types including: bladder, cervical, colorectal, esophageal, gastric, head and neck, hepatocellular, Hodgkin lymphoma, non-Hodgkin lymphoma, melanoma, multiple myeloma,mesothelioma, nasopharyngeal, NSCLC, ovarian, PMBCL, prostate, renal, small-cell lung and triple-negative breast, many of which are currently in Phase 3 clinical development. Further trials are being planned for other cancers.
MK-1293Lynparza, is an investigational follow-on biologic insulin glargine candidateoral PARP inhibitor currently approved for certain types of ovarian and breast cancer. In July 2017, Merck and AstraZeneca entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza for multiple cancer types (see Note 4 to the treatment ofconsolidated financial statements).
In April 2018, Merck and AstraZeneca announced that the EMA validated for review the Marketing Authorization Application for Lynparza for use in patients with type 1 and type 2 diabetesdeleterious or suspected deleterious BRCA-mutated, HER2-negative metastatic breast cancer who have been previously treated with chemotherapy in the neoadjuvant, adjuvant or metastatic setting. This was the first regulatory submission for a PARP inhibitor in breast cancer in Europe.
Lynparza tablets are also under review by the FDA. MK-1293 was approved in the EU as a maintenance treatment in January 2017. MK-1293 is being developedpatients with newly-diagnosed, BRCA-mutated advanced ovarian cancer who were in collaborationcomplete or partial response following first-line standard platinum-based chemotherapy. This submission was based on positive results from the pivotal Phase 3 SOLO-1 trial. The trial showed a statistically-significant and clinically-meaningful improvement in PFS for Lynparza compared to placebo, reducing the risk of disease progression or death by 70% in patients with and partially funded by Samsung Bioepis.newly-diagnosed, BRCA-mutated advanced ovarian cancer who were in complete or partial response to platinum-based chemotherapy.
V419 is an investigational pediatric hexavalent combination vaccine, DTaP5-IPV-Hib-HepB, under review with the FDA that is being developed and, if approved, will be commercialized through a partnership betweenIn December 2018, Merck and Sanofi. This vaccine is designed to help protect against six important diseases - diphtheria, tetanus, pertussis (whooping cough), polio (poliovirus types 1, 2, and 3), invasive disease caused by Haemophilus influenzae type b (Hib), and hepatitis B. On November 2, 2015,AstraZeneca announced positive results from the FDA issuedrandomized, open-label, controlled, Phase 3 SOLO-3 trial of Lynparza tablets in patients with relapsed ovarian cancer after two or more lines of treatment. The trial was conducted as a Complete Response Letter (CRL) with respect to the Biologics License Application for V419. Both companies are reviewing the CRL and plan to have further communicationpost-approval commitment in agreement with the FDA. In February 2016, the EC granted marketing authorization for V419 for prophylaxis against diphtheria, tetanus, pertussis, hepatitis B, poliomyelitis, and invasive disease caused by Hib, in infants and toddlersResults from the agetrial showed BRCA-mutated advanced ovarian cancer patients treated with Lynparza following two or more prior lines of 6 weeks. V419 is being marketed as Vaxelischemotherapy demonstrated a statistically significant and clinically meaningful improvement in the EU.
In additionprimary endpoint of ORR and the key secondary endpoint of PFS compared to chemotherapy. Merck and AstraZeneca plan to discuss these results with the candidates under regulatory review, the Company has several drug candidates in Phase 3 clinical development in addition to the FDA.Keytruda programs discussed above.
MK-8931, verubecestat, is an investigational small molecule inhibitor of the beta-site amyloid precursor protein cleaving enzyme 1 (BACE1) for the treatment of Alzheimer’s disease. In February 2017, Merck announced that its external Data Monitoring Committee (eDMC) recommended termination of the Phase 2/3 EPOCH study of verubecestat in mild-to-moderate Alzheimer’s disease based on the low probability of success of this study. The same eDMC recommended that a separate Phase 3 study, APECS, evaluating verubecestat for amnestic mild cognitive impairment due to Alzheimer’s disease, also known as prodromal Alzheimer’s disease, continue as planned. Estimated primary completion date for the APECS study, which is fully enrolled, is February 2019.
MK-0859, anacetrapib, is an investigational inhibitor of the cholesteryl ester transfer protein (CETP) in development for raising HDL-C and reducing LDL-C. Anacetrapib is being evaluated in a 30,000 patient, event-driven cardiovascular clinical outcomes trial sponsored by Oxford University, REVEAL (Randomized EValuation of the Effects of Anacetrapib Through Lipid-modification), involving patients with preexisting vascular disease. In November

2015, Merck announced that the Data Monitoring Committee (DMC) of the REVEAL outcomes study completed its planned review of unblinded study data and recommended the study continue with no changes. The DMC reviewed safety and efficacy data from the study, which included an assessment of futility. Merck remains blinded to the actual results of this analysis and to other REVEAL safety and efficacy data. Under the study, the last patient’s last visit occurred in January 2017. The Company anticipates receiving the top-line results from the study mid-year 2017.
MK-7655A is a combination of relebactam, an investigational beta-lactamase inhibitor, and imipenem/cilastatin (an approved carbapenem antibiotic). In February 2019, Merck announced that the FDA accepted for Priority Review an NDA for MK-7655A for the treatment of complicated urinary tract infections and complicated intra-abdominal infections caused by certain susceptible Gram-negative bacteria in adults with limited or no alternative therapies available. The PDUFA date is July 16, 2019. In April 2018, Merck announced that a pivotal Phase 3 study of MK-7655A demonstrated a favorable overall response in the treatment of certain imipenem-non-susceptible bacterial infections, the primary endpoint, with lower treatment-emergent nephrotoxicity (kidney toxicity), a secondary endpoint, compared to a colistin (colistimethate sodium) plus imipenem/cilastatin regimen. The FDA hashad previously designated this combination a Qualified Infectious Disease Product with designated Fast Track status for the treatment of hospital-acquired bacterial pneumonia, ventilator-associated bacterial pneumonia, complicated intra-abdominal infections and complicated urinary tract infections.
MK-8228, letermovir,V920 (rVSV∆G-ZEBOV-GP, live attenuated), is an investigational oral once-daily or an intravenous infusion antiviral candidate for the prevention of clinically-significant cytomegalovirus (CMV) infection. Letermovir has received Orphan Drug Status in the EU and in the United States, where it has also been granted Fast Track designation. In October 2016, Merck announced that the pivotal Phase 3 clinical study of letermovir met its primary endpoint. The global, multicenter, randomized, placebo-controlled study evaluated the efficacy and safety of letermovir in adult (18 years and older) CMV-seropositive recipients of an allogeneic hematopoietic stem cell transplant. Merck plans to submit regulatory applications for the approval of letermovir in the United States and EU in 2017.
MK-8835, ertugliflozin, is an investigational oral SGLT2 inhibitor being evaluated for the treatment of type 2 diabetes in collaboration with Pfizer Inc. (Pfizer). In September 2016, Merck and Pfizer announced that a Phase 3 study (VERTIS SITA2) of ertugliflozin met its primary endpoint. Both 5 mg and 15 mg daily doses of ertugliflozin showed significantly greater reductions in A1C (an average measure of blood glucose over the past two to three months) when added to patients on a background of sitagliptin and metformin. Ertugliflozin is also being studied in combination with Januvia (sitagliptin) and metformin. In December 2016, Merck submitted New Drug Applications to the FDA for ertugliflozin and the two fixed-dose combinations: MK-8835A, ertugliflozin plus Januvia, and MK-8835B, ertugliflozin plus metformin. The Company anticipates a response from the FDA in the first quarter of 2017. Ertugliflozin and the two fixed-dose combinations are currently under review in the EU. Under the terms of the collaboration agreement with Pfizer, Merck will make a $90 million milestone payment to Pfizer in 2017.
MK-0431J is an investigational fixed-dose combination of sitagliptin and ipragliflozin under development for commercialization in Japan in collaboration with Astellas Pharma Inc. (Astellas). Ipragliflozin, an SGLT2 inhibitor, co-developed by Astellas and Kotobuki Pharmaceutical Co., Ltd. (Kotobuki), is approved for use in Japan and is being co-promoted with Merck and Kotobuki.
V920 is an investigational rVSV-ZEBOV (Ebola)Ebola Zaire disease vaccine candidate being studied in large scale Phase 2/3 clinical trials. In November 2014, Merck and NewLink Genetics announced an exclusive licensing and collaboration agreement for the investigational Ebola vaccine. In December 2015, Merck announced that the application for Emergency Use Assessment and Listing (EUAL) for V920 was accepted for review by the World Health Organization (WHO). According to the WHO, the EUAL process is designed to expedite the availability of vaccines needed for public health emergencies such as another outbreak of Ebola. The WHO decision to grant V920 EUAL status will be based on data regarding quality, safety, and efficacy/effectiveness; as well as a risk/benefit analysis for emergency use. While EUAL designation allows for emergency use, the vaccine remains investigational and has not yet been licensed for commercial distribution. In July 2016, Merck announced that the FDA granted V920 Breakthrough Therapy designation, and that the EMA granted the vaccine candidate PRIME (PRIority MEdicines) status. In December 2016, endNovember 2018, Merck announced that it has started the submission of study results froma rolling BLA to the WHO ring vaccination trial were reportedFDA for V920. This rolling submission was made pursuant to the FDA’s Breakthrough Therapy designation. Merck expects the rolling submission of the BLA to be completed in Lancet supporting2019. The Company also intends to file V920 with the July 2015 interim assessmentEMA in 2019.

In February 2019, Merck announced that V920 offers substantial protection against Ebola virus disease,the FDA accepted for Priority Review a supplemental NDA for Zerbaxa to treat adult patients with no reported cases among vaccinated individuals from 10 days after vaccination in both randomized and non-randomized clusters. Results from other ongoing studies are anticipatednosocomial pneumonia, including ventilator-associated pneumonia, caused by certain susceptible Gram-negative microorganisms. The PDUFA date is June 3, 2019. Zerbaxa is also under review for this indication by the EMA. Zerbaxa is currently approved in the second halfUnited States for the treatment of 2017.adult patients with complicated urinary tract infections caused by certain susceptible Gram-negative microorganisms, and is also indicated, in combination with metronidazole, for the treatment of adult patients with complicated intra-abdominal infections caused by certain susceptible Gram-negative and Gram-positive microorganisms.
In addition to the candidates under regulatory review, the Company has several drug candidates in Phase 3 clinical development in addition to the Keytruda programs discussed above.
MK-7264, gefapixant, is a selective, non-narcotic, orally-administered P2X3-receptor agonist being investigated in Phase 3 trials for the treatment of refractory, chronic cough and in a Phase 2 trial for the treatment of women with endometriosis-related pain.
Lenvima, is an orally available tyrosine kinase inhibitor currently approved for certain types of thyroid cancer, hepatocellular carcinoma, and in combination for certain patients with renal cell carcinoma. In March 2018, Merck and Eisai entered into a strategic collaboration for the worldwide co-development and co-commercialization of Lenvima (see Note 4 to the consolidated financial statements). Under the agreement, Merck and Eisai will develop and commercialize Lenvima jointly, both as monotherapy and in combination with Keytruda. Per the agreement, the companies will jointly initiate clinical studies evaluating the Keytruda/Lenvima combination to support 11 potential indications in six types of cancer (endometrial cancer, NSCLC, hepatocellular carcinoma, head and neck cancer, bladder cancer and melanoma), as well as a basket trial targeting multiple cancer types. The FDA granted Breakthrough Therapy designation for Keytruda in combination with Lenvima for the potential treatment of patients with advanced and/or metastatic renal cell carcinoma and for the potential treatment of certain patients with advanced and/or metastatic non-microsatellite instability high/proficient mismatch repair endometrial carcinoma.
MK-1242, vericiguat, is an investigational treatment for heart failure being studied in a Phase 3 clinical trial in patients suffering from chronic heart failure.failure with reduced ejection fracture (Phase 3 clinical trial) and from chronic heart failure with preserved ejection fracture (Phase 2 clinical trial). The development of vericiguat is part of a worldwide strategic collaboration between Merck and Bayer (see Note 34 to the consolidated financial statements).
V212V114 is an inactivated varicella zoster virusinvestigational polyvalent conjugate vaccine in development for the prevention of herpes zoster. The Company completedpneumococcal disease. In June 2018, Merck initiated the Phase 3 trial in autologous hematopoietic cell transplant patients and is conducting another Phase 3 trial in patients with solid tumor malignancies undergoing chemotherapy and hematological malignancies. The

study in autologous hematopoietic cell transplant patients met its primary endpoints and Merck presented the results from this study at the American Society for Blood and Marrow Transplantation Meetings in February 2017.
MK-1439, doravirine, is an investigational non-nucleoside reverse transcriptase inhibitor being developed by Merck for the treatment of HIV-1 infection. In February 2017, the Company received positive results from a first Phase 3 study showing that doravirine was non-inferior to an alternative regimen in achievingthe adult population for the prevention of invasive pneumococcal disease. Currently five Phase 3 adult studies are ongoing, including studies in healthy adults 50 years of age or older, adults with risk factors for pneumococcal disease, those infected with HIV, and maintaining HIV-1 suppressionthose who are recipients of allogeneic hematopoietic stem cell transplant. In October 2018, Merck began the first Phase 3 study in infected adults during 48 weeks of treatment.
the pediatric population. Currently, three studies are ongoing, including studies in healthy infants and in children afflicted with sickle cell disease. In 2016, the Company also divested or discontinued certain drug candidates.
January 2019, Merck announced that it is discontinuingV114 received Breakthrough Therapy designation from the developmentFDA for the prevention of odanacatib, an investigational cathepsin K inhibitor for osteoporosis, and will not seek regulatory approval for its use. Merck previously reported a numeric imbalanceinvasive pneumococcal disease caused by the vaccine serotypes in adjudicated stroke events in the pivotal Phase 3 fracture outcomes study in postmenopausal women. The Company has decidedpediatric patients 6 weeks to discontinue development after an independent adjudication and analysis18 years of major adverse cardiovascular events confirmed an increased risk of stroke.age.
The Company determined that, for business reasons, it would terminate the North America partnership agreement with ALK-Abelló that included MK-8237, an investigational allergy immunotherapy tablet for house dust mite allergy. Merck has given ALK-Abelló six months’ notice that it is terminating the agreement and therefore this compound will be returned to ALK-Abelló. This decision was not due to efficacy or safety concerns. In connection with the decision, the Company recorded an IPR&D impairment charge (see Note 7 to the consolidated financial statements).
The Company also decided, for business reasons, to discontinue the clinical development of MK-8342B, referred to as the Next Generation Ring, an investigational combination (etonogestrel and 17ß-estradiol) vaginal ring for contraception and the treatment of dysmenorrhea in women seeking contraception. This decision was not due to efficacy or safety concerns. As a result of this decision, the Company recorded an IPR&D impairment charge (see Note 7 to the consolidated financial statements).
Merck announced that, for business reasons, it will not proceed with submitting marketing applications for omarigliptin, an investigational, once-weekly DPP-4 inhibitor,changes in the United States or Europe. This decision did not result from concerns aboutherpes zoster vaccine environment, Merck is ending development of V212, its investigational vaccine for the efficacy or safetyprevention of omarigliptin.shingles in immunocompromised patients.
The Company maintains a number of long-term exploratory and fundamental research programs in biology and chemistry as well as research programs directed toward product development. The Company’s research and development model is designed to increase productivity and improve the probability of success by prioritizing the Company’s research and development resources on candidates the Company believes are capable of providing unambiguous, promotable advantages to patients and payers and delivering the maximum value of its approved medicines and vaccines through new indications and new formulations. Merck is pursuing emerging product opportunities independent of therapeutic area or modality (small molecule, biologics and vaccines) and is building its biologics capabilities. The Company is committed to makingensuring that externally sourced programs a greaterremain an important component of its pipeline strategy, with a focus on supplementing its internal research with a licensing and external alliance strategy focused on the entire spectrum of collaborations from early research to late-stage compounds, as well as access to new technologies.

The Company also reviews its pipeline to examine candidates whichthat may provide more value through out-licensing. The Company continues to evaluate certain late-stage clinical development and platform technology assets to determine their out-licensing or sale potential.
The Company’s clinical pipeline includes candidates in multiple disease areas, including atherosclerosis, cancer, cardiovascular diseases, diabetes, infectious diseases, inflammatory/autoimmune diseases, neurodegenerativeneurosciences, obesity, pain, respiratory diseases, and respiratory diseases.vaccines.

Acquired In-Process Research and Development
In connection with business acquisitions, the Company has recorded the fair value of in-process research projects which, at the time of acquisition, had not yet reached technological feasibility. At December 31, 2016,2018, the balance of IPR&D was $1.7$1.1 billion. During 2016, the Company recorded IPR&D for projects obtained in connection with the acquisitions of Afferent and IOmet as discussed below.

During 2016, 2015 and 2014, $8 million, $280 million and $654 million, respectively, of IPR&D projects received marketing approval in a major market and the Company began amortizing these assets based on their estimated useful lives.
All of theThe IPR&D projects that remain in development are subject to the inherent risks and uncertainties in drug development and it is possible that the Company will not be able to successfully develop and complete the IPR&D programs and profitably commercialize the underlying product candidates. The time periods to receive approvals from the FDA and other regulatory agencies are subject to uncertainty. Significant delays in the approval process, or the Company’s failure to obtain approval at all, would delay or prevent the Company from realizing revenues from these products. Additionally, if certain of the IPR&D programs fail or are abandoned during development, then the Company will not realize the future cash flows it has estimated and recorded as IPR&D as of the acquisition date, and the Company may also not recover the research and development expenditures made since the acquisition to further develop such program.programs. If such circumstances were to occur, the Company’s future operating results could be adversely affected and the Company may recognize impairment charges and such charges could be material.
DuringIn 2018, 2017, and 2016 the Company recorded $3.6 billion of IPR&D impairment charges within Research and development expenses. Of this amount, $2.9 billion relates to the clinical development program for uprifosbuvir, a nucleotide prodrug in clinical development being evaluated for the treatmentexpenses of HCV. The Company determined that recent changes to the product profile, as well as changes to Merck’s expectations for pricing and the market opportunity, taken together constituted a triggering event that required the Company to evaluate the uprifosbuvir intangible asset for impairment. Utilizing market participant assumptions, and considering different scenarios, the Company concluded that its best estimate of the current fair value of the intangible asset related to uprifosbuvir was $240$152 million, resulting in the recognition of the pretax impairment charge noted above. The IPR&D impairment charges in 2016 also include charges of $180$483 million and $143 million related to the discontinuation of programs obtained in connection with the acquisitions of cCAM Biotherapeutics Ltd. and OncoEthix,$3.6 billion, respectively resulting from unfavorable efficacy data. An additional $72 million relates to programs obtained in connection with the SmartCells acquisition following a decision to terminate the lead compound due to a lack of efficacy and to pursue a back-up compound which reduced projected future cash flows. The IPR&D impairment charges in 2016 also include $112 million related to an in-licensed program for house dust mite allergies that, for business reasons, will be returned to the licensor. The remaining IPR&D impairment charges for 2016 primarily relate to deprioritized pipeline programs that were deemed to have no alternative use during the period, including a $79 million impairment charge for an investigational candidate for contraception. The discontinuation or delay of certain of these clinical development programs resulted in a reduction of the related liabilities for contingent consideration (see Note 38 to the consolidated financial statements).
During 2015, the Company recorded $63 million of IPR&D impairment charges, of which $50 million related to the surotomycin clinical development program. During 2015, the Company received unfavorable efficacy data from a clinical trial for surotomycin. The evaluation of this data, combined with an assessment of the commercial opportunity for surotomycin, resulted in the discontinuation of the program and the IPR&D impairment charge noted above.
During 2014, the Company recorded $49 million of IPR&D impairment charges primarily as a result of changes in cash flow assumptions for certain compounds obtained in connection with the Company’s joint venture with Supera Farma Laboratorios S.A., as well as for the discontinuation of certain Animal Health programs.
Additional research and development will be required before any of the remaining programs reach technological feasibility. The costs to complete the research projects will depend on whether the projects are brought to their final stages of development and are ultimately submitted to the FDA or other regulatory agencies for approval. As of December 31, 2016, the estimated costs to complete projects acquired in connection with acquisitions in Phase 3 development for human health were approximately $290 million.

Acquisitions, Research Collaborations and License Agreements
Merck continues to remain focused on pursuing opportunities that have the potential to drive both near- and long-term growth. Certain of the more recent significant transactions are described below. Merck is actively monitoring the landscape for growth opportunities that meet the Company’s strategic criteria.
In July 2016, Merck acquired Afferent, a privately held pharmaceutical company focused on the development of therapeutic candidates targeting the P2X3 receptor for the treatment of common, poorly-managed, neurogenic

conditions. Afferent’s lead investigational candidate, MK-7264 (formerly AF-219), is a selective, non-narcotic, orally-administered P2X3 antagonist being evaluated in a Phase 2b clinical trial for the treatment of refractory, chronic cough as well as in a Phase 2 clinical trial in idiopathic pulmonary fibrosis with cough. Total consideration transferred of $510 million included cash paid for outstanding Afferent shares of $487 million, as well as share-based compensation payments to settle equity awards attributable to precombination service and cash paid for transaction costs on behalf of Afferent. In addition, former Afferent shareholders are eligible to receive a total of up to an additional $750 million contingent upon the attainment of certain clinical development and commercial milestones for multiple indications and candidates, including MK-7264. This transaction was accounted for as an acquisition of a business; accordingly, the assets acquired and liabilities assumed were recorded at their respective fair values as of the acquisition date. The Company determined the fair value of the contingent consideration was $223 million at the acquisition date utilizing a probability-weighted estimated cash flow stream adjusted for the expected timing of each payment using an appropriate discount rate dependent on the nature and timing of the milestone payment. Merck recognized an intangible asset for IPR&D of $832 million, net deferred tax liabilities of $258 million, and other net assets of $29 million (primarily consisting of cash acquired). The excess of the consideration transferred over the fair value of net assets acquired of $130 million was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair value of the identifiable intangible asset related to IPR&D was determined using an income approach, through which fair value is estimated based upon the asset’s probability-adjusted future net cash flows, which reflects the stage of development of the project and the associated probability of successful completion. The net cash flows were then discounted to present value using a discount rate of 11.5%. Actual cash flows are likely to be different than those assumed.
In June 2016,March 2018, Merck and Moderna entered intoEisai announced a strategic collaboration for the worldwide co-development and licenseco-commercialization of Lenvima, an orally available tyrosine kinase inhibitor discovered by Eisai. Under the agreement, toMerck and Eisai will develop and commercialize novel mRNA-based personalized cancer vaccines. The development program will entail multiple studies in several types of cancerLenvima jointly, both as monotherapy and include the evaluation of mRNA-based personalized cancer vaccines in combination with Merck’s anti-PD-1 therapy, Keytruda. Pursuant to the terms ofUnder the agreement, Merck made an upfront cash payment to ModernaEisai of $750 million and will make payments of up to $650 million for certain option rights through 2021 (of which $325 million will be paid in March 2019, $200 million which wasis expected to be paid in 2020 and $125 million is expected to be paid in 2021). The Company recorded a charge of $1.4 billion in Research and development expenses. Following human proofexpenses in 2018 related to the upfront payment and future option payments. In addition, the agreement provides for Eisai to receive up to $385 million associated with the achievement of concept studies, Merck has the rightcertain clinical and regulatory milestones and up to elect to make an additional payment to Moderna. If Merck exercises this right, the two companies will then equally share cost and profits under a worldwide collaboration$3.97 billion for the developmentachievement of personalizedmilestones associated with sales of Lenvima (see Note 4 to the consolidated financial statements).
In June 2018, Merck acquired Viralytics Limited (Viralytics), an Australian publicly traded company focused on oncolytic immunotherapy treatments for a range of cancers, for AUD 502 million ($378 million). The transaction provided Merck with full rights to Cavatak (V937, formerly CVA21), Viralytics’s investigational oncolytic immunotherapy. Cavatak is based on Viralytics’s proprietary formulation of an oncolytic virus (Coxsackievirus Type A21) that has been shown to preferentially infect and kill cancer vaccines. Moderna will have the right to elect to co-promote the personalized cancer vaccinescells. Cavatak is currently being evaluated in the United States. The agreement entails exclusivity around combinationsmultiple Phase 1 and Phase 2 clinical trials, both as an intratumoral and intravenous agent, including in combination with Keytruda. ModernaUnder a previous agreement between Merck and Merck will each haveViralytics, a study is investigating the ability to combine mRNA-based personalized cancer vaccines with other (non-PD-1) agents.
In January 2016, Merck acquired IOmet, a privately held UK-based drug discovery company focused onuse of the development of innovative medicines for the treatment of cancer, with a particular emphasis on the fields of cancer immunotherapyKeytruda and cancer metabolism. The acquisition provides Merck with IOmet’s preclinical pipeline of IDO (indoleamine-2,3-dioxygenase 1), TDO (tryptophan-2,3-dioxygenase),Cavatak combination in melanoma, prostate, lung and dual-acting IDO/TDO inhibitors.bladder cancers. The transaction was accounted for as an acquisition of a business. Total purchase consideration in the transaction included a cash paymentan asset. Merck recorded net assets of $150$34 million and future additional milestone payments of up to $250 million that are contingent upon certain clinical and regulatory milestones being achieved. The Company determined the fair value of the contingent consideration was $94 million(primarily cash) at the acquisition date utilizing a probability-weighted estimated cash flow stream adjusted for the expected timingand Research

and development expenses of each payment utilizing a discount rate of 10.5%. Merck recognized intangible assets for IPR&D of $155$344 million and net deferred tax assets of $32 million. The excess of the consideration transferred over the fair value of net assets acquired of $57 million was recorded as goodwill that was allocatedin 2018 related to the Pharmaceutical segment and is not deductible for tax purposes. The fair values oftransaction. There are no future contingent payments associated with the identifiable intangible assets related to IPR&D were determined using an income approach. The assets’ probability-adjusted future net cash flows were then discounted to present value also using a discount rate of 10.5%. Actual cash flows are likely to be different than those assumed.
Selected Joint Venture and Affiliate Information
Sanofi Pasteur MSD
On December 31, 2016, Merck and Sanofi terminated the equally-owned joint venture formed in 1994 to develop and market vaccines in Europe (see Note 8 to the consolidated financial statements).

Sales of joint venture products (prior to termination) were as follows:
($ in millions)2016 2015 2014
Gardasil/Gardasil 9
$216
 $184
 $248
Influenza vaccines106
 128
 159
Other viral vaccines95
 77
 87
RotaTeq56
 56
 65
Zostavax52
 87
 103
Hepatitis vaccines48
 62
 38
Other vaccines435
 329
 430
 $1,008
 $923
 $1,130
AstraZeneca LP
On June 30, 2014, AstraZeneca exercised an option that resulted in the redemption of Merck’s remaining interest in AstraZeneca LP (AZLP), the partnership between Merck and AstraZeneca, for $419 million in cash (see Note 8 to the consolidated financial statements). Of this amount, $327 million reflected an estimate of the fair value of Merck’s interest in Nexium and Prilosec (products sold by AZLP). This portion of the exercise price, which is subject to a true-up in 2018 based on actual sales from closing in 2014 to June 2018, was deferred and recognized as income of $5 million, $182 million and $140 million, during 2016, 2015, and 2014, respectively, in Other (income) expense, net as the contingency was eliminated as sales occurred. Once the deferred income amount was fully amortized, in the first quarter of 2016, the Company began recognizing income and a corresponding receivable for amounts that will be due to Merck from AstraZeneca based on the sales performance of Nexium and Prilosec subject to the true-up in June 2018. The Company recognized $93 million of such income in 2016 included in Other (income) expense, net.
The remaining exercise price of $91 million primarily represents a multiple of ten times Merck’s average 1% annual profit allocation in the partnership for the three years prior to exercise. Merck recognized the $91 million as a gain in 2014 within Other (income) expense, net. The Company also recognized a non-cash gain of approximately $650 million in 2014 within Other (income) expense, net resulting from the retirement of $2.4 billion of preferred stock, the elimination of the Company’s $1.4 billion investment in AZLP and a $340 million reduction of goodwill. This transaction resulted in a net tax benefit of $517 million in 2014 primarily reflecting the reversal of deferred taxes on the AZLP investment balance.acquisition.
In 2014, priorFebruary 2019, Merck and Immune Design entered into a definitive agreement under which Merck will acquire Immune Design for $5.85 per share in cash for an approximate value of $300 million. Immune Design is a late-stage immunotherapy company employing next-generation in vivo approaches to termination,enable the body’s immune system to fight disease. Immune Design’s proprietary technologies, GLAAS and ZVex, are engineered to activate the immune system’s natural ability to generate and/or expand antigen-specific cytotoxic immune cells to fight cancer and other chronic diseases. Under the terms of the acquisition agreement, Merck, recorded revenue from AZLPthrough a subsidiary, will initiate a tender offer to acquire all outstanding shares of $463 millionImmune Design. The closing of the tender offer will be subject to certain conditions, including the tender of shares representing at least a majority of the total number of Immune Design’s outstanding shares, the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act and earned partnership returnsother customary conditions. The transaction is expected to close early in the second quarter of $192 million, which were recorded in equity income from affiliates included in Other (income) expense, net.2019.
Capital Expenditures
Capital expenditures were $2.6 billion in 2018, $1.9 billion in 2017 and $1.6 billion in 2016, $1.3 billion in 2015 and $1.3 billion in 2014.2016. Expenditures in the United States were $1.5 billion in 2018, $1.2 billion in 2017 and $1.0 billion in 2016, $879 million in 2015 and $873 million in 2014.2016. In October 2018, the Company announced it plans to invest approximately $16 billion on new capital projects from 2018-2022. The focus of this investment will primarily be on increasing manufacturing capacity across Merck’s key businesses.
Depreciation expense was $1.4 billion in 2018, $1.5 billion in 2017 and $1.6 billion in 2016, $1.6 billion in 2015 and $2.5 billion in 20142016. In each of whichthese years, $1.0 billion $1.1 billion and $2.0 billion, respectively,of the depreciation expense applied to locations in the United States. Total depreciation expense in 2016, 20152017 and 20142016 included accelerated depreciation of $227 million, $174$60 million and $900$227 million, respectively, associated with restructuring activities (see Note 45 to the consolidated financial statements).
Analysis of Liquidity and Capital Resources
Merck’s strong financial profile enables it to fund research and development, focus on external alliances, support in-line products and maximize upcoming launches while providing significant cash returns to shareholders.
Selected Data          
($ in millions)2016 2015 20142018 2017 2016
Working capital$13,410
 $10,550
 $14,198
$3,669
 $6,152
 $13,410
Total debt to total liabilities and equity26.0% 26.0% 21.7%30.4% 27.8% 26.0%
Cash provided by operations to total debt0.4:1
 0.5:1
 0.4:1
0.4:1
 0.3:1
 0.4:1
The decline in working capital in 2018 compared with 2017 reflects the utilization of cash and short-term borrowings to fund $5.0 billion of ASR agreements, a $1.25 billion payment to redeem debt in connection with the exercise of a make-whole provision as discussed below, as well as a $750 million upfront payment related to the formation of a collaboration with Eisai discussed above. The decline in working capital in 2017 compared with 2016 primarily reflects the reclassification of $3.0 billion of notes due in the first half of 2018 from long-term debt to short-term debt, $1.85 billion of upfront and option payments related to the formation of the AstraZeneca collaboration discussed above, as well as $810 million paid to redeem debt in connection with tender offers discussed below.
Cash provided by operating activities was $10.9 billion in 2018, $6.5 billion in 2017 and $10.4 billion in 2016, $12.5 billion in 2015 and $8.0 billion in 2014. Cash2016. The lower cash provided by operating activities in 20162017 reflects a net$2.8 billion payment related to the settlement of approximately $680 million to fund the

Vioxx shareholder class action litigation settlement not covered by insurance proceedscertain federal income tax issues (see Note 1016 to the consolidated financial statements). Cash provided, payments of $1.85 billion related to the formation of a collaboration with AstraZeneca (see Note 4 to the consolidated financial statements), and a $625 million payment made by operating activities in 2014 reflects approximately $5.0 billionthe Company related to the previously disclosed settlement of taxes paid on the divestiture of MCC.worldwide Keytruda patent litigation. Cash provided by operating activities continues to be the Company’s primary source of funds to finance operating needs, capital expenditures, a portion of treasury stock purchases and dividends paid to shareholders.
Cash used inprovided by investing activities was $3.2$4.3 billion in 20162018 compared with $4.8$2.7 billion in 2015.2017. The lower use ofincrease in cash in 2016provided by investing activities was driven primarily by cash used in 2015 for the acquisition of Cubist, as well as lower purchases of securities and other investments, in 2016, partially offset by higher capital expenditures, lower proceeds from the sales of securities and other investments, and a $350 million milestone payment in 2016 and2018 related to a collaboration with Bayer (see Note 4 to the consolidated financial statements). Cash provided by investing activities was $2.7 billion in 2017 compared with a use

of cash in 2016 for the acquisitions of Afferent and StayWell. Cash used in investing activities was $4.8of $3.2 billion in 2015 compared with $374 million in 20142016. The change was driven primarily reflecting cash received in 2014 from the divestiture of MCC, higher cash received in 2014 from other dispositions of businesses and in connection with AstraZeneca’s option exercise, as well as cash used for the acquisition of Cubist in 2015, partially offset by lower purchases of securities and other investments, higher proceeds from the sales of securities and other investments and a lower use of cash used in 2014 for the acquisitionacquisitions of Idenix, and a cash payment made in 2014 upon the formation of the collaboration with Bayer.businesses.
Cash used in financing activities was $13.2 billion in 2018 compared with $10.0 billion in 2017. The increase in cash used in financing activities was driven primarily by higher purchases of treasury stock (largely under ASR agreements as discussed below), higher payments on debt and payment of contingent consideration related to a prior year business acquisition, partially offset by an increase in short-term borrowings. Cash used in financing activities was $10.0 billion in 2017 compared with $9.0 billion in 2016 compared with $5.4 billion2016. The increase in 2015cash used in financing activities was driven primarily by lower proceeds from the issuance of debt partially offset by a decrease in short-term borrowings in the prior year, lower payments on debt, lower2016, as well as higher purchases of treasury stock and higher proceeds from the exercise of stock options. Cash used in financing activities was $5.4 billion in 2015 compared with $15.2 billion in 2014 driven primarily by higher proceeds from the issuance of debt, lower payments on debt and lower purchases of treasury stock, partially offset by lower proceeds from the exercise of stock options and a decrease in short-term borrowings.
During 2015, the Company recorded charges of $876 million related to the devaluation of its net monetary assets2017, partially offset by lower payments on debt in Venezuela, the large majority of which was cash (see Note 14 to the consolidated financial statements).
At December 31, 2016, the total of worldwide cash and investments was $25.8 billion, including $14.3 billion of cash, cash equivalents and short-term investments, and $11.4 billion of long-term investments. Generally 80%-90% of cash and investments are held by foreign subsidiaries and would be subject to significant tax payments if such cash and investments were repatriated in the form of dividends. The Company records U.S. deferred tax liabilities for certain unremitted earnings, but when amounts earned overseas are expected to be indefinitely reinvested outside of the United States, no accrual for U.S. taxes is provided. The amount of cash and investments held by U.S. and foreign subsidiaries fluctuates due to a variety of factors including the timing and receipt of payments in the normal course of business. Cash provided by operating activities in the United States continues to be the Company’s primary source of funds to finance domestic operating needs, capital expenditures, a portion of treasury stock purchases and dividends paid to shareholders.2017.
The Company’s contractual obligations as of December 31, 20162018 are as follows:
Payments Due by Period                  
($ in millions)Total 2017 2018—2019 2020—2021 ThereafterTotal 2019 2020—2021 2022—2023 Thereafter
Purchase obligations (1)
$2,131
 $655
 $744
 $435
 $297
$2,349
 $886
 $1,011
 $407
 $45
Loans payable and current portion of long-term debt (2)
570
 570
 
 
 
5,309
 5,309
 
 
 
Long-term debt24,266
 
 4,277
 4,156
 15,833
19,882
 
 4,237
 4,000
 11,645
Interest related to debt obligations9,189
 683
 1,276
 1,101
 6,129
7,680
 662
 1,163
 932
 4,923
Keytruda patent litigation settlement
625
 625
 
 
 
Unrecognized tax benefits (3)
2,014
 2,014
 
 
 
Operating leases754
 200
 263
 151
 140
Unrecognized tax benefits (2)
44
 44
 
 
 
Transition tax related to the enactment of the TCJA (3)
4,899
 275
 873
 1,217
 2,534
Leases997
 188
 348
 218
 243
$39,549
 $4,747
 $6,560
 $5,843
 $22,399
$41,160
 $7,364
 $7,632
 $6,774
 $19,390
(1)  
Includes future inventory purchases the Company has committed to in connection with certain divestitures.
(2)
In February 2017, $300 million of floating rate notes matured and were repaid.
(3)  
As of December 31, 2016,2018, the Company’s Consolidated Balance Sheet reflects liabilities for unrecognized tax benefits, interest and penalties of $4.4$2.3 billion, including $2.0 billion$44 million reflected as a current liability. Due to the high degree of uncertainty regarding the timing of future cash outflows of liabilities for unrecognized tax benefits beyond one year, a reasonable estimate of the period of cash settlement for years beyond 20172019 cannot be made.

(3)
In connection with the enactment of the TCJA, the Company is required to pay a one-time transition tax, which the Company has elected to pay over a period of eight years as permitted under the TCJA (see Note 16 to the consolidated financial statements).
Purchase obligations are enforceable and legally binding obligations for purchases of goods and services including minimum inventory contracts, research and development and advertising. Amounts reflected for research and development obligations do not include contingent milestone payments. In 2017,payments related to collaborative arrangements and acquisitions. Contingent milestone payments are not considered contractual obligations as they are contingent upon the successful achievement of developmental, regulatory approval and commercial milestones. At December 31, 2018, the Company will make a $90 millionhas liabilities for milestone payment in connectionpayments related to collaborations with a clinical program being developed in a collaborationAstraZeneca, Eisai and Bayer (see “Research and Development” above)Note 4 to the consolidated financial statements). Also excluded from research and development obligations are potential future funding commitments of up to approximately $90$40 million for investments in research venture capital funds. Loans payable and current portion of long-term debt reflects $267$149 million of long-dated notes that are subject to repayment at the option of the holders. Required funding obligations for 20172019 relating to the Company’s pension and other postretirement benefit plans are not expected to be material. However, the Company currently anticipates contributing approximately $50 million to its U.S. pension plans, $160$150 million to its international pension plans and $25$15 million to its other postretirement benefit plans during 2017.2019.
In December 2018, the Company exercised a make-whole provision on its $1.25 billion, 5.00% notes due 2019 and repaid this debt.
In November 2017, the Company launched tender offers for certain outstanding notes and debentures. The Company paid $810 million in aggregate consideration (applicable purchase price together with accrued interest) to redeem $585 million principal amount of debt that was validly tendered in connection with the tender offers.
In November 2016, the Company issued €1.0 billion principal amount of senior unsecured notes consisting of €500 million principal amount of 0.50% notes due 2024 and €500 million principal amount of 1.375% notes due 2036. The Company intends to useused the net proceeds of the offering of $1.1 billion for general corporate purposes, including without limitation, the repayment of outstanding commercial paper borrowings and other indebtedness with upcoming maturities.purposes.
In June 2016, the
The Company terminated its existing credit facility and entered intohas a new $6.0 billion five-year credit facility that matures in June 2021.2023. The facility provides backup liquidity for the Company’s commercial paper borrowing facility and is to be used for general corporate purposes. The Company has not drawn funding from this facility.
In December 2015,March 2018, the Company filed a securities registration statement with the U.S. Securities and Exchange Commission (SEC) under the automatic shelf registration process available to “well-known seasoned issuers” which is effective for three years.
In February 2015, Merck issued $8.0 billion aggregate principal amount of senior unsecured notes. The Company used a portion of the net proceeds of the offering of $7.9 billion to repay commercial paper issued to substantially finance the Company’s acquisition of Cubist. The remaining net proceeds were used for general corporate purposes, including for repurchases of the Company’s common stock, and the repayment of outstanding commercial paper borrowings and debt maturities.
Also in February 2015, the Company redeemed $1.9 billion of legacy Cubist debt acquired in the acquisition (see Note 3 to the consolidated financial statements).
In October 2014, the Company issued €2.5 billion principal amount of senior unsecured notes. The net proceeds of the offering of $3.1 billion were used in part to repay debt that was validly tendered in connection with tender offers launched by the Company for certain outstanding notes and debentures. The Company paid $2.5 billion in aggregate consideration (applicable purchase price together with accrued interest) to redeem $1.8 billion principal amount of debt. In November 2014, Merck redeemed an additional $2.0 billion principal amount of senior unsecured notes.
Effective as of November 3, 2009, the Company executed a full and unconditional guarantee of the then existing debt of its subsidiary Merck Sharp & Dohme Corp. (MSD) and MSD executed a full and unconditional guarantee of the then existing debt of the Company (excluding commercial paper), including for payments of principal and interest. These guarantees do not extend to debt issued subsequent to that date.
The Company continues to maintain a conservative financial profile. The Company places its cash and investments in instruments that meet high credit quality standards, as specified in its investment policy guidelines. These guidelines also limit the amount of credit exposure to any one issuer. The Company does not participate in any off-balance sheet arrangements involving unconsolidated subsidiaries that provide financing or potentially expose the Company to unrecorded financial obligations.
In November 2016,October 2018, Merck announced that its Board of Directors approved a 15% increase to the Company’s quarterly dividend, raising it to $0.55 per share from $0.48 per share on the Company’s outstanding common stock. Payment was made in January 2019. In January 2019, the Board of Directors declared a quarterly dividend of $0.47$0.55 per share on the Company’s common stock for the second quarter of 2019 payable in January 2017.April 2019.
In March 2015,November 2017, Merck’s boardBoard of directorsDirectors authorized additional purchases of up to $10 billion of Merck’s common stock for its treasury. The treasury stock purchase authorization has no time limit and will be made over time

in open-market transactions, block transactions, on or off an exchange, or in privately negotiated transactions. In October 2018, Merck’s Board of Directors authorized an additional $10 billion of treasury stock purchases with no time limit for completion and the Company entered into ASR agreements of $5 billion as discussed below. The Company spent $9.1 billion to purchase shares of its common stock for its treasury during 2018. As of December 31, 2018, the Company’s remaining share repurchase authorization was $11.9 billion. The Company purchased $4.0 billion and $3.4 billion of its common stock (60 million shares) for its treasury during 2016. The Company has approximately $5.1 billion remaining under the March share repurchase program. The Company purchased $4.2 billion2017 and $7.7 billion of its common stock during 2015 and 2014,2016, respectively, under this and previously authorized share repurchase programs.
On October 25, 2018, the Company entered into ASR agreements with two third-party financial institutions (Dealers). Under the ASR agreements, Merck agreed to purchase $5 billion of Merck’s common stock, in total, with an initial delivery of 56.7 million shares of Merck’s common stock, based on the then-current market price, made by the Dealers to Merck, and payments of $5 billion made by Merck to the Dealers on October 29, 2018, which were funded with existing cash and investments, as well as short-term borrowings. The number of shares of Merck’s common stock that Merck may receive, or may be required to remit, upon final settlement under the ASR agreements will be based upon the average daily volume weighted-average price of Merck’s common stock during the term of the ASR program, less a negotiated discount. Final settlement of the transaction under the ASR agreements is expected to occur in the first half of 2019, but may occur earlier at the option of the Dealers, or later under certain circumstances. If Merck is obligated to make adjustment payments to the Dealers under the ASR agreements, Merck may elect to satisfy such obligations in cash or in shares of Merck’s common stock.
Financial Instruments Market Risk Disclosures
The Company manages the impact of foreign exchange rate movements and interest rate movements on its earnings, cash flows and fair values of assets and liabilities through operational means and through the use of various financial instruments, including derivative instruments.
A significant portion of the Company’s revenues and earnings in foreign affiliates is exposed to changes in foreign exchange rates. The objectives and accounting related to the Company’s foreign currency risk management program, as well as its interest rate risk management activities are discussed below.

Foreign Currency Risk Management
The Company has established revenue hedging, balance sheet risk management, and net investment hedging programs to protect against volatility of future foreign currency cash flows and changes in fair value caused by volatility in foreign exchange rates.

The objective of the revenue hedging program is to reduce the variability caused by changes in foreign exchange rates that would affect the U.S. dollar value of future cash flows derived from foreign currency denominated sales, primarily the euro and Japanese yen. To achieve this objective, the Company will hedge a portion of its forecasted foreign currency denominated third-party and intercompany distributor entity sales (forecasted sales) that are expected to occur over its planning cycle, typically no more than two years into the future. The Company will layer in hedges over time, increasing the portion of forecasted sales hedged as it gets closer to the expected date of the forecasted foreign currency denominated sales. The portion of forecasted sales hedged is based on assessments of cost-benefit profiles that consider natural offsetting exposures, revenue and exchange rate volatilities and correlations, and the cost of hedging instruments. The Company manages its anticipated transaction exposure principally with purchased local currency put options, forward contracts, and purchased collar options.
Because Merck principally sells foreign currency in its revenue hedging program, a uniform weakening of the U.S. dollar would yield the largest overall potential loss in the market value of these hedge instruments. The market value of Merck’s hedges would have declined by an estimated $538$441 million and $502$400 million at December 31, 20162018 and 2015,2017, respectively, from a uniform 10% weakening of the U.S. dollar. The market value was determined using a foreign exchange option pricing model and holding all factors except exchange rates constant. Although not predictive in nature, the Company believes that a 10% threshold reflects reasonably possible near-term changes in Merck’s major foreign currency exposures relative to the U.S. dollar. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.
The Company manages operating activities and net asset positions at theeach local levelsubsidiary in order to mitigate the effecteffects of exchange on monetary assets and liabilities. The Company also uses a balance sheet risk management program to mitigate the exposure of net monetary assets that are denominated in a currency other than a subsidiary’s functional currency from the effects of volatility in foreign exchange. In these instances, Merck principally utilizes forward exchange contracts to offset the effects of exchange on exposures denominated in developed country currencies, primarily the euro and Japanese yen. For exposures in developing country currencies, the Company will enter into forward contracts to partially offset the effects of exchange on exposures when it is deemed economical to do so based on a cost-benefit analysis that considers the magnitude of the exposure, the volatility of the exchange rate and the cost of the hedging instrument. The cash flows from these contracts are reported as operating activities in the Consolidated StatementsStatement of Cash Flows.
A sensitivity analysis to changes in the value of the U.S. dollar on foreign currency denominated derivatives, investments and monetary assets and liabilities indicated that if the U.S. dollar uniformly weakened by 10% against all currency exposures of the Company at December 31, 2016,2018 and 2017, Income before taxes would have declined by approximately $26$134 million and $92 million in 2016.2018 and 2017, respectively. Because the Company was in a net short (payable) position relative to its major foreign currencies after consideration of forward contracts, a uniform weakening of the U.S. dollar will yield the largest overall potential net loss in earnings due to exchange. At December 31, 2015, the Company was in a net long (receivable)

position relative to its major foreign currencies after consideration of forward contracts, therefore a uniform 10% strengthening of the U.S. dollar would have reduced Income before taxes by approximately $45 million. This measurement assumes that a change in one foreign currency relative to the U.S. dollar would not affect other foreign currencies relative to the U.S. dollar. Although not predictive in nature, the Company believes that a 10% threshold reflects reasonably possible near-term changes in Merck’s major foreign currency exposures relative to the U.S. dollar. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.
Since January 2010, Venezuela has been designatedThe economy of Argentina was determined to be hyperinflationary and, as a result, local foreign operations are remeasured in 2018; consequently, in accordance with U.S. dollars with the impact recorded in results of operations. In 2015, the Venezuelan government identified multiple exchange rates, which included the CENCOEX rate (6.3 VEF per U.S. dollar) and the SIMADI rate. While the Venezuelan government had indicated that essential goods, including food and medicine, would remain at the CENCOEX rate, during the second quarter of 2015, upon evaluation of evolving economic conditions in Venezuela and volatility in the country, combined with a decline in transactions that were settled at the CENCOEX rate, the Company determined it was unlikely that all outstanding net monetary assets would be settled at the CENCOEX rate. Accordingly, during the second quarter of 2015, the Company recorded a charge of $715 million within Other (income) expense, net to devalue its net monetary assets in Venezuela to an amount that represented the Company’s estimate of the U.S. dollar amount that would ultimately be collected. During the third quarter of 2015, the Company recorded additional exchange losses of $138 million in the aggregate reflecting the ongoing effect of translating transactions and net monetary assets consistent with the second quarter. As a result of the further deterioration of economic conditions in Venezuela and continued declines in transactions which were settled at the CENCOEX rate (subsequently replaced by the DIPRO rate), in the fourth quarter of 2015,GAAP, the Company began using the SIMADI rate, which was 198.70 VEF per U.S. at December 31, 2015, to reportremeasuring its Venezuelan operations. The Company also revalued its remaining net monetary assets atand liabilities for those operations in earnings. The impact to the SIMADI rate (subsequently replaced with the DICOM rate), which resulted in an additional charge in the fourth quarter of 2015 of $161 million.Company’s results was immaterial.
The Company may also useuses forward exchange contracts to hedge its net investment in foreign operations against movements in exchange rates. The forward contracts are designated as hedges of the net investment in a foreign operation. The Company hedges a portion of the net investment in certain of its foreign operations and measures ineffectiveness based upon changes in spot foreign exchange rates that are recorded in Other (income) expense, net.operations. The effective portion of the unrealized gains or losses on these contracts isare recorded in foreign currency translation adjustment within Other Comprehensive Income (Loss) (OCI), and remainsremain in Accumulated Other Comprehensive Income(Loss) (AOCI) until either the sale or complete or substantially complete liquidation of the subsidiary. The Company excludes certain portions of the change in fair value of its derivative instruments from the assessment of hedge effectiveness (excluded component). Changes in fair value of the excluded components are recognized in OCI. In accordance with the new guidance adopted on January 1, 2018 (see Note 2 to the consolidated financial statements), the Company has elected to recognize in earnings the initial value of the excluded component on a straight-line basis over the life of the derivative instrument, rather

than using the mark-to-market approach. The cash flows from these contracts are reported as investing activities in the Consolidated Statement of Cash Flows.
Foreign exchange risk is also managed through the use of foreign currency debt. The Company’s senior unsecured euro-denominated notes have been designated as, and are effective as, economic hedges of the net investment in a foreign operation. Accordingly, foreign currency transaction gains or losses due to spot rate fluctuations on the euro-denominated debt instruments are included in foreign currency translation adjustment within OCI.

Interest Rate Risk Management
The Company may use interest rate swap contracts on certain investing and borrowing transactions to manage its net exposure to interest rate changes and to reduce its overall cost of borrowing. The Company does not use leveraged swaps and, in general, does not leverage any of its investment activities that would put principal capital at risk.
In May 2016,2018, four interest rate swaps with notional amounts of $250 million eachaggregating $1.0 billion matured. These swaps effectively converted the Company’s $1.0 billion, 0.70%1.30% fixed-rate notes due 20162018 to variable rate debt. In December 2018, in connection with the early repayment of debt, the Company settled three interest rate swaps with notional amounts aggregating $550 million. These swaps effectively converted a portion of the Company’s $1.25 billion, 5.00% notes due 2019 to variable rate debt. At December 31, 2016,2018, the Company was a party to 2619 pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges of fixed-rate notes in which the notional amounts match the amount of the hedged fixed-rate notes as detailed in the table below.

($ in millions)20162018
Debt InstrumentPar Value of Debt Number of Interest Rate Swaps Held Total Swap Notional AmountPar Value of Debt Number of Interest Rate Swaps Held Total Swap Notional Amount
1.30% notes due 20181,000
 4
 1,000
5.00% notes due 20191,250
 3
 550
1.85% notes due 20201,250
 5
 1,250
$1,250
 5
 $1,250
3.875% notes due 20211,150
 5
 1,150
1,150
 5
 1,150
2.40% notes due 20221,000
 4
 1,000
1,000
 4
 1,000
2.35% notes due 20221,250
 5
 1,250
1,250
 5
 1,250
The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in the benchmark London Interbank Offered Rate (LIBOR) swap rate. The fair value changes in the notes attributable to changes in the LIBOR swap rate are recorded in interest expense and offset byalong with the offsetting fair value changes in the swap contracts. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.
The Company’s investment portfolio includes cash equivalents and short-term investments, the market values of which are not significantly affected by changes in interest rates. The market value of the Company’s medium- to long-term fixed-rate investments is modestly affected by changes in U.S. interest rates. Changes in medium- to long-term U.S. interest rates have a more significant impact on the market value of the Company’s fixed-rate borrowings, which generally have longer maturities. A sensitivity analysis to measure potential changes in the market value of Merck’s investments and debt from a change in interest rates indicated that a one percentage point increase in interest rates at December 31, 20162018 and 20152017 would have positively affected the net aggregate market value of these instruments by $1.3$1.2 billion and $1.2$1.3 billion, respectively. A one percentage point decrease at December 31, 20162018 and 20152017 would have negatively affected the net aggregate market value by $1.6$1.4 billion and $1.5 billion, respectively. The fair value of Merck’s debt was determined using pricing models reflecting one percentage point shifts in the appropriate yield curves. The fair values of Merck’s investments were determined using a combination of pricing and duration models.


Critical Accounting Policies
The Company’s consolidated financial statements are prepared in conformity with GAAP and, accordingly, include certain amounts that are based on management’s best estimates and judgments. Estimates are used when accounting for amounts recorded in connection with acquisitions, including initial fair value determinations of assets and liabilities, primarily IPR&D, other intangible assets and contingent consideration, as well as subsequent fair value measurements. Additionally, estimates are used in determining such items as provisions for sales discounts and returns, depreciable and amortizable lives, recoverability of inventories, including those produced in preparation for product launches, amounts recorded for contingencies, environmental liabilities, accruals for contingent sales-based milestone payments and other reserves, pension and other postretirement benefit plan assumptions, share-based compensation assumptions, restructuring costs, impairments of long-lived assets (including intangible assets and goodwill) and investments, and taxes on income. Because of the uncertainty inherent in such estimates, actual results may differ from these estimates. Application of the following accounting policies result in accounting estimates having the potential for the most significant impact on the financial statements.
Acquisitions and Dispositions
To determine whether transactions should be accounted for as acquisitions qualify as business combinations(or disposals) of assets or asset acquisitions,businesses, the Company makes certain judgments, which include assessment of the inputs, processes, and outputs associated with the acquired set of activities. On October 1, 2016, the Company adopted new accounting guidance intended to clarify whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. If the Company determines that substantially all of the fair value of gross assets included in a transaction is concentrated in a single asset (or a group of similar assets), the assets would not represent a business. To be considered a business, the assets in a transaction need to include an input and a substantive process that together significantly contribute to the ability to create outputs. Prior to the adoption of the new guidance, the Company would consider an acquisition or disposition a business if there were inputs, as well as processes that when applied to those inputs had the ability to create outputs.
In a business combination, the acquisition method of accounting requires that the assets acquired and liabilities assumed be recorded as of the date of the acquisition at their respective fair values with limited exceptions.

Assets acquired and liabilities assumed in a business combination that arise from contingencies are generally recognized at fair value ifvalue. If fair value can reasonably be estimated. If the acquisition date fair value of an asset acquired or liability assumed that arises from a contingency cannot be determined, the asset or liability is recognized if probable and reasonably estimable; if these criteria are not met, no asset or liability is recognized. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Accordingly, the Company may be required to value assets at fair value measures that do not reflect the Company’s intended use of those assets. Any excess of the purchase price (consideration transferred) over the estimated fair values of net assets acquired is recorded as goodwill. Transaction costs and costs to restructure the acquired company are expensed as incurred. The operating results of the acquired business are reflected in the Company’s consolidated financial statements after the date of the acquisition. The fair values of intangible assets, including acquired IPR&D, are determined utilizing information available near the acquisition date based on expectations and assumptions that are deemed reasonable by management. Given the considerable judgment involved in determining fair values, the Company typically obtains assistance from third-party valuation specialists for significant items. Amounts allocated to acquired IPR&D are capitalized and accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the projects. Upon successful completion of each project, Merck will make a separate determination as to the then usefulthen-useful life of the asset, generally determined by the period in which the substantial majority of the cash flows are expected to be generated, and begin amortization. Certain of the Company’s business acquisitions involve the potential for future payment of consideration that is contingent upon the achievement of performance milestones, including product development milestones and royalty payments on future product sales. The fair value of contingent consideration liabilities is determined at the acquisition date using unobservable inputs. These inputs include the estimated amount and timing of projected cash flows, the probability of success (achievement of the contingent event) and the risk-adjusted discount rate used to present value the probability-weighted cash flows. Subsequent to the acquisition date, at each reporting period, the contingent consideration liability is remeasured at current fair value with changes (either expense or income) recorded in earnings. Changes in any of the inputs may result in a significantly different fair value adjustment.
The judgments made in determining estimated fair values assigned to assets acquired and liabilities assumed in a business combination, as well as asset lives, can materially affect the Company’s results of operations.
If the Company determines the transaction will not be accounted for as an acquisition of a business, the transaction will be accounted for as an acquisition of assets rather than a business combination and, therefore, no goodwill will be recorded. In an asset acquisition, acquired IPR&D with no alternative future use is charged to expense at the acquisition date.
The fair values of identifiable intangible assets related to currently marketed products and product rights are primarily determined by using an income approach through which fair value is estimated based on each asset’s

discounted projected net cash flows. The Company’s estimates of market participant net cash flows consider historical and projected pricing, margins and expense levels; the performance of competing products where applicable; relevant industry and therapeutic area growth drivers and factors; current and expected trends in technology and product life cycles; the time and investment that will be required to develop products and technologies; the ability to obtain marketing and regulatory approvals; the ability to manufacture and commercialize the products; the extent and timing of potential new product introductions by the Company’s competitors; and the life of each asset’s underlying patent, if any. The net cash flows are then probability-adjusted where appropriate to consider the uncertainties associated with the underlying assumptions, as well as the risk profile of the net cash flows utilized in the valuation. The probability-adjusted future net cash flows of each product are then discounted to present value utilizing an appropriate discount rate.
The fair values of identifiable intangible assets related to IPR&D are also determined using an income approach, through which fair value is estimated based on each asset’s probability-adjusted future net cash flows, which reflect the different stages of development of each product and the associated probability of successful completion. The net cash flows are then discounted to present value using an appropriate discount rate.
If the Company determines the transaction will not be accounted for as an acquisition of a business, the transaction will be accounted for as an asset acquisition rather than a business combination and, therefore, no goodwill will be recorded. In an asset acquisition, acquired IPR&D with no alternative future use is charged to expense and contingent consideration is not recognized at the acquisition date.
Revenue Recognition
RevenuesOn January 1, 2018, the Company adopted a new standard on revenue recognition (see Note 2 to the consolidated financial statements). Changes to the Company’s revenue recognition policy as a result of adopting the new guidance are described below.
Recognition of revenue requires evidence of a contract, probable collection of sales proceeds and completion of substantially all performance obligations. Merck acts as the principal in substantially all of its customer arrangements and therefore records revenue on a gross basis. The majority of the Company’s contracts related to the Pharmaceutical and Animal Health segments have a single performance obligation - the promise to transfer goods. Shipping is considered immaterial in the context of the overall customer arrangement and damages or loss of goods in transit are rare. Therefore, shipping is not deemed a separately recognized performance obligation.
The vast majority of revenues from sales of products are recognized at a point in time when control of the goods is transferred to the customer, which the Company has determined is when title and riskrisks and rewards of lossownership transfer to the customer and the Company is entitled to payment. Certain Merck entities, including U.S. entities, have contract terms under which control of the goods passes to the customer typicallyupon shipment; however, either pursuant to the terms of the contract or as a business practice, Merck retains responsibility for goods lost or damaged in transit. Prior to the adoption of the new standard, Merck would recognize revenue for these entities upon delivery of the goods. Under the new guidance, the Company is now recognizing revenue at time of delivery. Recognitionshipment for these entities.
For businesses within the Company’s Healthcare Services segment and certain services in the Animal Health segment, revenue is recognized over time, generally ratably over the contract term as services are provided. These service revenues are not material.
The nature of revenue also requires reasonable assurancethe Company’s business gives rise to several types of collectionvariable consideration including discounts and returns, which are estimated at the time of sales proceeds andsale generally using the expected value method, although the most likely amount method is used for prompt pay discounts.

completion of all performance obligations. Domestically,In the United States, sales discounts are issued to customers as direct discounts at the point-of-sale, indirectly through an intermediary wholesaler known(known as chargebacks,chargebacks), or indirectly in the form of rebates. Additionally, sales are generally made with a limited right of return under certain conditions. Revenues are recorded net of provisions for sales discounts and returns, which are established at the time of sale. In addition, revenues are recorded net of time value of money discounts for customers for whichif collection of accounts receivable is expected to be in excess of one year.
The U.S. provision for aggregate indirect customer discounts covers chargebacks and rebates. Chargebacks are discounts that occur when a contracted customer purchases directly through an intermediary wholesaler. The contracted customer generally purchases product from the wholesaler at its contracted price plus a mark-up from the wholesaler.mark-up. The wholesaler, in turn, charges

the Company back for the difference between the price initially paid by the wholesaler and the contract price paid to the wholesaler by the customer. The provision for chargebacks is based on expected sell-through levels by the Company’s wholesale customers to contracted customers, as well as estimated wholesaler inventory levels. Rebates are amounts owed based upon definitive contractual agreements or legal requirements with private sector and public sector (Medicaid and Medicare Part D) benefit providers, after the final dispensing of the product by a pharmacy to a benefit plan participant. The provision for rebates is based on expected payments, which are driven by patient usage, and contract performance byas well as inventory levels in the distribution channel to determine the contractual obligation to the benefit provider customers.
providers. The Company uses historical customer segment utilization mix, adjusted for other known events,sales forecasts, changes to product mix and price, inventory levels in the distribution channel, government pricing calculations and prior payment history in order to estimate the expected provision. Amounts accrued for aggregate indirect customer discounts are evaluated on a quarterly basis through comparison of information provided by the wholesalers, health maintenance organizations, pharmacy benefit managers, federal and state agencies, and other customers to the amounts accrued. Adjustments are recorded when trends or significant events indicate that a change in the estimated provision is appropriate.
The Company continually monitors its provision for aggregate indirect customer discounts. There were no material adjustments to estimates associated with the aggregate indirect customer discount provision in 2016, 20152018, 2017 or 2014.2016.
Summarized information about changes in the aggregate indirect customer discount accrual related to U.S. sales is as follows:
($ in millions)2016 20152018 2017
Balance January 1$2,798
 $2,154
$2,551
 $2,945
Current provision9,831
 8,068
10,837
 11,001
Adjustments to prior years(169) (77)(117) (286)
Payments(9,515) (7,347)(10,641) (11,109)
Balance December 31$2,945
 $2,798
$2,630
 $2,551
Accruals for chargebacks are reflected as a direct reduction to accounts receivable and accruals for rebates as current liabilities. The accrued balances relative to these provisions included in Accounts receivable and Accrued and other current liabilities were $196$245 million and $2.7$2.4 billion, respectively, at December 31, 20162018 and were $145$198 million and $2.7$2.4 billion, respectively, at December 31, 2015.2017.
Outside of the United States, variable consideration in the form of discounts and rebates are a combination of commercially-driven discounts in highly competitive product classes, discounts required to gain or maintain reimbursement, or legislatively mandated rebates. In certain European countries, legislatively mandated rebates are calculated based on an estimate of the government’s total unbudgeted spending and the Company’s specific payback obligation. Rebates may also be required based on specific product sales thresholds. The Company applies an estimated factor against its actual invoiced sales to represent the expected level of future discount or rebate obligations associated with the sale.
The Company maintains a returns policy that allows its U.S. pharmaceutical customers to return product within a specified period prior to and subsequent to the expiration date (generally, three to six months before and 12 months after product expiration). The estimate of the provision for returns is based upon historical experience with actual returns. Additionally, the Company considers factors such as levels of inventory in the distribution channel, product dating and expiration period, whether products have been discontinued, entrance in the market of additional generic competition, changes in formularies or launch of over-the-counter products, among others. The product returns provision for U.S. pharmaceutical sales as a percentage of U.S. net pharmaceutical sales was 1.6% in 2018, 2.1% in 2017 and 1.4% in 2016, 1.5%2016. Outside of the United States, returns are only allowed in 2015certain countries on a limited basis.
Merck’s payment terms for U.S. pharmaceutical customers are typically net 36 days from receipt of invoice and 1.7% in 2014.for U.S. animal health customers are typically net 30 days from receipt of invoice; however, certain products, including Keytruda, have longer payment terms up to 90 days. Outside of the United States, payment terms are typically 30 days to 90 days, although certain markets have longer payment terms.
Through its distribution programs with U.S. wholesalers, the Company encourages wholesalers to align purchases with underlying demand and maintain inventories below specified levels. The terms of the programs allow the wholesalers to earn fees upon providing visibility into their inventory levels, as well as by achieving certain performance parameters such as inventory management, customer service levels, reducing shortage claims and reducing

product returns. Information provided through the wholesaler distribution programs includes items such as sales trends, inventory on-hand, on-order quantity and product returns.

Wholesalers generally provide only the above mentionedabove-mentioned data to the Company, as there is no regulatory requirement to report lot level information to manufacturers, which is the level of information needed to determine the remaining shelf life and original sale date of inventory. Given current wholesaler inventory levels, which are generally less than a month, the Company believes that collection of order lot information across all wholesale customers would have limited use in estimating sales discounts and returns.
Inventories Produced in Preparation for Product Launches
The Company capitalizes inventories produced in preparation for product launches sufficient to support estimated initial market demand. Typically, capitalization of such inventory does not begin until the related product candidates are in Phase 3 clinical trials and are considered to have a high probability of regulatory approval. The Company monitors the status of each respective product within the regulatory approval process; however, the Company generally does not disclose specific timing for regulatory approval. If the Company is aware of any specific risks or contingencies other than the normal regulatory approval process or if there are any specific issues identified during the research process relating to safety, efficacy, manufacturing, marketing or labeling, the related inventory would generally not be capitalized. Expiry dates of the inventory are affected by the stage of completion. The Company manages the levels of inventory at each stage to optimize the shelf life of the inventory in relation to anticipated market demand in order to avoid product expiry issues. For inventories that are capitalized, anticipated future sales and shelf lives support the realization of the inventory value as the inventory shelf life is sufficient to meet initial product launch requirements. Inventories produced in preparation for product launches capitalized at December 31, 20162018 and 20152017 were $80$7 million and $63$80 million, respectively.
Contingencies and Environmental Liabilities
The Company is involved in various claims and legal proceedings of a nature considered normal to its business, including product liability, intellectual property and commercial litigation, as well as certain additional matters (see Note 1011 to the consolidated financial statements.)statements). The Company records accruals for contingencies when it is probable that a liability has been incurred and the amount can be reasonably estimated. These accruals are adjusted periodically as assessments change or additional information becomes available. For product liability claims, a portion of the overall accrual is actuarially determined and considers such factors as past experience, number of claims reported and estimates of claims incurred but not yet reported. Individually significant contingent losses are accrued when probable and reasonably estimable.
Legal defense costs expected to be incurred in connection with a loss contingency are accrued when probable and reasonably estimable. Some of the significant factors considered in the review of these legal defense reserves are as follows: the actual costs incurred by the Company; the development of the Company’s legal defense strategy and structure in light of the scope of its litigation; the number of cases being brought against the Company; the costs and outcomes of completed trials and the most current information regarding anticipated timing, progression, and related costs of pre-trial activities and trials in the associated litigation. The amount of legal defense reserves as of December 31, 20162018 and 20152017 of approximately $185$245 million and $245$160 million, respectively, represents the Company’s best estimate of the minimum amount of defense costs to be incurred in connection with its outstanding litigation; however, events such as additional trials and other events that could arise in the course of its litigation could affect the ultimate amount of legal defense costs to be incurred by the Company. The Company will continue to monitor its legal defense costs and review the adequacy of the associated reserves and may determine to increase the reserves at any time in the future if, based upon the factors set forth, it believes it would be appropriate to do so.
The Company and its subsidiaries are parties to a number of proceedings brought under the Comprehensive Environmental Response, Compensation and Liability Act, commonly known as Superfund, and other federal and state equivalents. When a legitimate claim for contribution is asserted, a liability is initially accrued based upon the estimated transaction costs to manage the site. Accruals are adjusted as site investigations, feasibility studies and related cost assessments of remedial techniques are completed, and as the extent to which other potentially responsible parties who may be jointly and severally liable can be expected to contribute is determined.
The Company is also remediating environmental contamination resulting from past industrial activity at certain of its sites and takes an active role in identifying and accruing for these costs. In the past, Merck performed a worldwide survey to assess all sites for potential contamination resulting from past industrial activities. Where

assessment indicated that physical investigation was warranted, such investigation was performed, providing a better evaluation of the need for remedial action. Where such need was identified, remedial action was then initiated. As

definitive information became available during the course of investigations and/or remedial efforts at each site, estimates were refined and accruals were established or adjusted accordingly. These estimates and related accruals continue to be refined annually.
The Company believes that there are no compliance issues associated with applicable environmental laws and regulations that would have a material adverse effect on the Company. Expenditures for remediation and environmental liabilities were $11$16 million in 2016,2018, and are estimated at $44$57 million in the aggregate for the years 20172019 through 2021.2023. In management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have been accrued and totaled $83$71 million and $109$82 million at December 31, 20162018 and 2015,2017, respectively. These liabilities are undiscounted, do not consider potential recoveries from other parties and will be paid out over the periods of remediation for the applicable sites, which are expected to occur primarily over the next 15 years. Although it is not possible to predict with certainty the outcome of these matters, or the ultimate costs of remediation, management does not believe that any reasonably possible expenditures that may be incurred in excess of the liabilities accrued should exceed $64$60 million in the aggregate. Management also does not believe that these expenditures should result in a material adverse effect on the Company’s financial position, results of operations, liquidity or capital resources for any year.
Share-Based Compensation
The Company expenses all share-based payment awards to employees, including grants of stock options, over the requisite service period based on the grant date fair value of the awards. The Company determines the fair value of certain share-based awards using the Black-Scholes option-pricing model which uses both historical and current market data to estimate the fair value. This method incorporates various assumptions such as the risk-free interest rate, expected volatility, expected dividend yield and expected life of the options. Total pretax share-based compensation expense was $348 million in 2018, $312 million in 2017 and $300 million in 2016, $299 million in 2015 and $278 million in 2014.2016. At December 31, 2016,2018, there was $443$560 million of total pretax unrecognized compensation expense related to nonvested stock option, restricted stock unit and performance share unit awards which will be recognized over a weighted average period of 1.9 years. For segment reporting, share-based compensation costs are unallocated expenses.
Pensions and Other Postretirement Benefit Plans
Net periodic benefit cost for pension plans totaled $195 million in 2018, $201 million in 2017 and $144 million in 2016. Net periodic benefit (credit) for other postretirement benefit plans totaled $56was $(45) million in 2016, $2532018, $(60) million in 20152017 and $169$(88) million in 2014.2016. Pension and other postretirement benefit plan information for financial reporting purposes is calculated using actuarial assumptions including a discount rate for plan benefit obligations and an expected rate of return on plan assets. The changes in net periodic benefit cost year over year for pension plans are largely attributable to changes in the discount rate affecting net loss amortization. The decrease in net periodic benefit cost for other postretirement benefit plans in 2016 as compared with 2015 is largely attributable to changes in retiree medical benefits approved by the Company in December 2015.
The Company reassesses its benefit plan assumptions on a regular basis. For both the pension and other postretirement benefit plans, the discount rate is evaluated on measurement dates and modified to reflect the prevailing market rate of a portfolio of high-quality fixed-income debt instruments that would provide the future cash flows needed to pay the benefits included in the benefit obligation as they come due. The discount rates for the Company’s U.S. pension and other postretirement benefit plans ranged from 3.40%4.00% to 4.30%4.40% at December 31, 2016,2018, compared with a range of 3.80%3.20% to 4.80%3.80% at December 31, 2015.2017.
The expected rate of return for both the pension and other postretirement benefit plans represents the average rate of return to be earned on plan assets over the period the benefits included in the benefit obligation are to be paid. In developing the expected rate of return, the Company considers long-term compound annualized returns of historical market data, as well ascurrent market conditions and actual returns on the Company’s plan assets. Using this reference information, the Company develops forward-looking return expectations for each asset category and a weighted-average expected long-term rate of return for a target portfolio allocated across these investment categories. The expected portfolio performance reflects the contribution of active management as appropriate. For 2017,2019, the expected rate of return for the Company’s U.S. pension and other postretirement benefit plans will range from 8.00%7.70% to 8.75%8.10%, as compared to a range of 7.30%7.70% to 8.75%8.30% in 2016.2018. The decrease is primarily due to a modest shift in asset allocation.
The Company has established investment guidelines for its U.S. pension and other postretirement plans to create an asset allocation that is expected to deliver a rate of return sufficient to meet the long-term obligation of each

plan, given an acceptable level of risk. The target investment portfolio of the Company’s U.S. pension and other

postretirement benefit plans is allocated 40%30% to 60%50% in U.S. equities, 20%15% to 40%30% in international equities, 15%30% to 25%45% in fixed-income investments, and up to 5% in cash and other investments. The portfolio’s equity weighting is consistent with the long-term nature of the plans’ benefit obligations. The expected annual standard deviation of returns of the target portfolio, which approximates 13%11%, reflects both the equity allocation and the diversification benefits among the asset classes in which the portfolio invests. For non-U.S. pension plans, the targeted investment portfolio varies based on the duration of pension liabilities and local government rules and regulations. Although a significant percentage of plan assets are invested in U.S. equities, concentration risk is mitigated through the use of strategies that are diversified within management guidelines.
Actuarial assumptions are based upon management’s best estimates and judgment. A reasonably possible change of plus (minus) 25 basis points in the discount rate assumption, with other assumptions held constant, would have had an estimated $81$80 million favorable (unfavorable) impact on the Company’s current year net periodic benefit cost.cost in 2018. A reasonably possible change of plus (minus) 25 basis points in the expected rate of return assumption, with other assumptions held constant, would have had an estimated $46$50 million favorable (unfavorable) impact on Merck’s current year net periodic benefit cost.cost in 2018. Required funding obligations for 20172019 relating to the Company’s pension and other postretirement benefit plans are not expected to be material. The preceding hypothetical changes in the discount rate and expected rate of return assumptions would not impact the Company’s funding requirements.
Net loss amounts, which reflect experience differentials primarily relating to differences between expected and actual returns on plan assets as well as the effects of changes in actuarial assumptions, are recorded as a component of AOCI. Expected returns for pension plans are based on a calculated market-related value of assets. Under this methodology, asset gains/losses resulting from actual returns that differ from the Company’s expected returns are recognized in the market-related value of assets ratably over a five-year period. Also, net loss amounts in AOCI in excess of certain thresholds are amortized into net periodic benefit cost over the average remaining service life of employees.
Restructuring Costs
Restructuring costs have been recorded in connection with restructuring programs designed to streamline the Company’s cost structure. As a result, the Company has made estimates and judgments regarding its future plans, including future termination benefits and other exit costs to be incurred when the restructuring actions take place. When accruing thesetermination costs, the Company will recognize the amount within a range of costs that is the best estimate within the range. When no amount within the range is a better estimate than any other amount, the Company recognizes the minimum amount within the range. In connection with these actions, management also assesses the recoverability of long-lived assets employed in the business. In certain instances, asset lives have been shortened based on changes in the expected useful lives of the affected assets. Severance and other related costs are reflected within Restructuring costs. Asset-related charges are reflected within Materials and productionCost of sales costs,, MarketingSelling, general and administrative expenses and Research and development expenses depending upon the nature of the asset.
Impairments of Long-Lived Assets
The Company assesses changes in economic, regulatory and legal conditions and makes assumptions regarding estimated future cash flows in evaluating the value of the Company’s property, plant and equipment, goodwill and other intangible assets.
The Company periodically evaluates whether current facts or circumstances indicate that the carrying values of its long-lived assets to be held and used may not be recoverable. If such circumstances are determined to exist, an estimate of the undiscounted future cash flows of these assets, or appropriate asset groupings, is compared to the carrying value to determine whether an impairment exists. If the asset is determined to be impaired, the loss is measured based on the difference between the asset’s fair value and its carrying value. If quoted market prices are not available, the Company will estimate fair value using a discounted value of estimated future cash flows approach.
Goodwill represents the excess of the consideration transferred over the fair value of net assets of businesses acquired andacquired. Goodwill is assigned to reporting units. The Company tests its goodwillunits and evaluated for impairment on at least an annual basis, or more frequently if impairment indicators exist, by first assessing qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. Some of the factors considered in the assessment include general macroeconomic conditions, conditions specific to the industry and market, cost factors which could have a significant effect on earnings or cash flows, the overall financial performance of the reporting unit,

and whether there have been sustained declines in the Company’s share price. Additionally, the Company evaluates

the extent to which the fair value exceeded the carrying value of the reporting unit at the last date a valuation was performed. If the Company concludes it is more likely than not that the fair value of a reporting unit is less than its carrying amount, a quantitative fair value test is performed. If the carrying value of a reporting unit is greater than its fair value, a goodwill impairment charge will be recorded for the difference (up to the carrying value of goodwill).
Other acquired intangible assets (excluding IPR&D) are initially recorded at fair value, assigned an estimated useful life, and are amortized primarily on a straight-line basis over their estimated useful lives. When events or circumstances warrant a review, the Company will assess recoverability from future operations using pretax undiscounted cash flows derived from the lowest appropriate asset groupings. Impairments are recognized in operating results to the extent that the carrying value of the intangible asset exceeds its fair value, which is determined based on the net present value of estimated future cash flows.
IPR&D that the Company acquires through business combinations represents the fair value assigned to incomplete research projects which, at the time of acquisition, have not reached technological feasibility. The amounts are capitalized and accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the project. The Company tests IPR&D for impairment at least annually, or more frequently if impairment indicators exist, by first assessing qualitative factors to determine whether it is more likely than not that the fair value of the IPR&D intangible asset is less than its carrying amount. If the Company concludes it is more likely than not that the fair value is less than the carrying amount, a quantitative test that compares the fair value of the IPR&D intangible asset with its carrying value is performed. For impairment testing purposes, the Company may combine separately recorded IPR&D intangible assets into one unit of account based on the relevant facts and circumstances. Generally, the Company will combine IPR&D intangible assets for testing purposes if they operate as a single asset and are essentially inseparable. If the fair value is less than the carrying amount, an impairment loss is recognized within the Company’s operating results.
The judgments made in evaluating impairment of long-lived intangibles can materially affect the Company’s results of operations.
Impairments of Investments
The Company reviews its investments in marketable debt securities for impairments based on the determination of whether the decline in market value of the investment below the carrying value is other-than-temporary. The Company considers available evidence in evaluating potential impairments of its investments in marketable debt securities, including the duration and extent to which fair value is less than cost and, for equity securities, the Company’s ability and intent to hold the investments. For debt securities, ancost. Changes in fair value that are considered temporary are reported net of tax in OCI. An other-than-temporary impairment has occurred if the Company does not expect to recover the entire amortized cost basis of the marketable debt security. If the Company does not intend to sell the impaired debt security, and it is not more likely than not it will be required to sell the debt security before the recovery of its amortized cost basis, the amount of the other-than-temporary impairment recognized in earnings, recorded in Other (income) expense, net, is limited to the portion attributed to credit loss. The remaining portion of the other-than-temporary impairment related to other factors is recognized in OCI.
Investments in publicly traded equity securities are reported at fair value determined using quoted market prices in active markets for identical assets or quoted prices for similar assets or other inputs that are observable or can be corroborated by observable market data. Changes in fair value are included in Other (income) expense, net. Investments in equity securities without readily determinable fair values are recorded at cost, plus or minus subsequent observable price changes in orderly transactions for identical or similar investments, minus impairments. Such adjustments are recognized in Other (income) expense, net. Realized gains and losses for equity securities are included in Other (income) expense, net.
Taxes on Income
The Company’s effective tax rate is based on pretax income, statutory tax rates and tax planning opportunities available in the various jurisdictions in which the Company operates. An estimated effective tax rate for a year is applied to the Company’s quarterly operating results. In the event that there is a significant unusual or one-time item recognized, or expected to be recognized, in the Company’s quarterly operating results, the tax attributable to that item would be separately calculated and recorded at the same time as the unusual or one-time item. The Company considers the resolution of prior year tax matters to be such items. Significant judgment is required in determining the Company’s tax provision and in evaluating its tax positions. The recognition and measurement of a tax position is based on

management’s best judgment given the facts, circumstances and information available at the reporting date. The Company evaluates tax positions to determine whether the benefits of tax positions are more likely than not of being sustained upon audit based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit in the financial statements. If the more likely than not threshold is not met in the period for which a tax position is taken, the Company may subsequently recognize the benefit of that tax position if the tax matter is effectively settled, the statute of limitations expires, or if the more likely than not threshold is met in a subsequent period (see Note 1516 to the consolidated financial statements.)

statements).
Tax regulations require items to be included in the tax return at different times than the items are reflected in the financial statements. Timing differences create deferred tax assets and liabilities. Deferred tax assets generally represent items that can be used as a tax deduction or credit in the tax return in future years for which the Company has already recorded the tax benefit in the financial statements. The Company establishes valuation allowances for its deferred tax assets when the amount of expected future taxable income is not likely to support the use of the deduction or credit. Deferred tax liabilities generally represent tax expense recognized in the financial statements for which payment has been deferred or expense for which the Company has already taken a deduction on the tax return, but has not yet recognized as expense in the financial statements. At December 31, 2016, foreign earnings of $63.1 billion have been retained indefinitely by subsidiary companies for reinvestment; therefore, no provision has been made for income taxes that would be payable upon the distribution of such earnings and it would not be practicable to determine the amount of the related unrecognized deferred income tax liability.
Recently Issued Accounting Standards
In May 2014,For a discussion of recently issued accounting standards, see Note 2 to the Financial Accounting Standards Board (FASB) issued amended accounting guidance on revenue recognition that will be applied to all contracts with customers. The objective of the new guidance is to improve comparability of revenue recognition practices across entities and to provide more useful information to users of financial statements through improved disclosure requirements. In August 2015, the FASB approved a one-year deferral of the effective date making this guidance effective for interim and annual periods beginning in 2018. The new standard permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of adopting the guidance being recognized at the date of initial application (modified retrospective method). The Company will adopt the new standard on January 1, 2018 and currently plans to use the modified retrospective method. The majority of the Company’s business is ship and bill and, on that primary revenue stream, Merck does not expect significant differences. However, the Company’s analysis is preliminary and subject to change. Merck has not completed its assessment of multiple element arrangements and certain discount and trade promotion programs.
In January 2016, the FASB issued revised guidance for the accounting and reporting of financial instruments. The new guidance requires that equity investments with readily determinable fair values currently classified as available for sale be measured at fair value with changes in fair value recognized in net income. The new guidance also simplifies the impairment testing of equity investments without readily determinable fair values and changes certain disclosure requirements. This guidance is effective for interim and annual periods beginning in 2018. Early adoption is not permitted. The Company is currently assessing the impact of adoption on its consolidated financial statements.
In February 2016, the FASB issued new accounting guidance for the accounting and reporting of leases. The new guidance requires that lessees recognize a right-of-use asset and a lease liability recorded on the balance sheet for each of its leases (other than leases that meet the definition of a short-term lease).  Leases will be classified as either operating or finance. Operating leases will result in straight-line expense in the income statement (similar to current operating leases) while finance leases will result in more expense being recognized in the earlier years of the lease term (similar to current capital leases). The new guidance will be effective for interim and annual periods beginning in 2019. Early adoption is permitted. The Company is currently evaluating the impact of adoption on its consolidated financial statements.
In June 2016, the FASB issued amended guidance on the accounting for credit losses on financial instruments within its scope. The guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new guidance also changes the impairment model for available-for-sale debt securities, requiring the use of an allowance to record estimated credit losses (and subsequent recoveries). The new guidance is effective for interim and annual periods beginning in 2020, with earlier application permitted in 2019. The Company is currently evaluating the impact of adoption on its consolidated financial statements.
In August 2016, the FASB issued guidance on the classification of certain cash receipts and payments in the statement of cash flows intended to reduce diversity in practice. The guidance is effective for interim and annual periods beginning in 2018. Early adoption is permitted. The guidance is to be applied retrospectively to all periods presented but may be applied prospectively if retrospective application would be impracticable. The Company is currently evaluating the effect of the standard on its Consolidated Statement of Cash Flows.

In October 2016, the FASB issued guidance on the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Under existing guidance, the recognition of current and deferred income taxes for an intra-entity asset transfer is prohibited until the asset has been sold to a third party. The new guidance will require the recognition of the income tax consequences of an intra-entity transfer of an asset (with the exception of inventory) when the intra-entity transfer occurs. The guidance is effective for interim and annual periods beginning in 2018. Early adoption is permitted. The new guidance is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings in the beginning of the period of adoption. The Company does not anticipate the adoption of the new guidance will have a material effect on its consolidated financial statements.
In November 2016, the FASB issued guidance requiring that amounts generally described as restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The guidance is effective for interim and annual periods beginning in 2018 and should be applied using a retrospective transition method to each period presented. Early adoption is permitted. The Company is currently evaluating the effect of the standard on its Consolidated Statement of Cash Flows.
In January 2017, the FASB issued guidance that provides for the elimination of Step 2 from the goodwill impairment test. If impairment charges are recognized, the amount recorded will be the amount by which the carrying amount exceeds the reporting unit’s fair value with certain limitations. The new guidance is effective for interim and annual periods in 2021. The Company does not anticipate the adoption of the new guidance will have a material effect on its consolidated financial statements.
Cautionary Factors That May Affect Future Results
This report and other written reports and oral statements made from time to time by the Company may contain so-called “forward-looking statements,” all of which are based on management’s current expectations and are subject to risks and uncertainties which may cause results to differ materially from those set forth in the statements. One can identify these forward-looking statements by their use of words such as “anticipates,” “expects,” “plans,” “will,” “estimates,” “forecasts,” “projects” and other words of similar meaning.meaning, or negative variations of any of the foregoing. One can also identify them by the fact that they do not relate strictly to historical or current facts. These statements are likely to address the Company’s growth strategy, financial results, product development, product approvals, product potential and development programs. One must carefully consider any such statement and should understand that many factors could cause actual results to differ materially from the Company’s forward-looking statements. These factors include inaccurate assumptions and a broad variety of other risks and uncertainties, including some that are known and some that are not. No forward-looking statement can be guaranteed and actual future results may vary materially.
The Company does not assume the obligation to update any forward-looking statement. One should carefully evaluate such statements in light of factors, including risk factors, described in the Company’s filings with the Securities and Exchange Commission, especially on this Form 10-K and Forms 10-Q and 8-K. In Item 1A. “Risk Factors” of this annual report on Form 10-K the Company discusses in more detail various important risk factors that could cause actual results to differ from expected or historic results. The Company notes these factors for investors as permitted by the Private Securities Litigation Reform Act of 1995. One should understand that it is not possible to predict or identify all such factors. Consequently, the reader should not consider any such list to be a complete statement of all potential risks or uncertainties.
 
Item 7a.7A.Quantitative and Qualitative Disclosures about Market Risk.
The information required by this Item is incorporated by reference to the discussion under “Financial Instruments Market Risk Disclosures” in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Item 8.Financial Statements and Supplementary Data.                
(a)Financial Statements
The consolidated balance sheet of Merck & Co., Inc. and subsidiaries as of December 31, 20162018 and 2015,2017, and the related consolidated statements of income, of comprehensive income, of equity and of cash flows for each of the three years in the period ended December 31, 2016,2018, the notes to consolidated financial statements, and the report dated February 28, 201727, 2019 of PricewaterhouseCoopers LLP, independent registered public accounting firm, are as follows:
Consolidated Statement of Income
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions except per share amounts)
2016 2015 20142018 2017 2016
Sales$39,807
 $39,498
 $42,237
$42,294
 $40,122
 $39,807
Costs, Expenses and Other          
Materials and production13,891
 14,934
 16,768
Marketing and administrative9,762
 10,313
 11,606
Cost of sales13,509
 12,912
 14,030
Selling, general and administrative10,102
 10,074
 10,017
Research and development10,124
 6,704
 7,180
9,752
 10,339
 10,261
Restructuring costs651
 619
 1,013
632
 776
 651
Other (income) expense, net720
 1,527
 (11,613)(402) (500) 189
35,148
 34,097
 24,954
33,593
 33,601
 35,148
Income Before Taxes4,659
 5,401
 17,283
8,701
 6,521
 4,659
Taxes on Income718
 942
 5,349
2,508
 4,103
 718
Net Income3,941
 4,459
 11,934
6,193
 2,418
 3,941
Less: Net Income Attributable to Noncontrolling Interests21
 17
 14
Less: Net (Loss) Income Attributable to Noncontrolling Interests(27) 24
 21
Net Income Attributable to Merck & Co., Inc.$3,920
 $4,442
 $11,920
$6,220
 $2,394
 $3,920
Basic Earnings per Common Share Attributable to Merck & Co., Inc. Common Shareholders$1.42
 $1.58
 $4.12
$2.34
 $0.88
 $1.42
Earnings per Common Share Assuming Dilution Attributable to Merck & Co., Inc. Common Shareholders$1.41
 $1.56
 $4.07
$2.32
 $0.87
 $1.41

Consolidated Statement of Comprehensive Income
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions)
2016 2015 20142018 2017 2016
Net Income Attributable to Merck & Co., Inc.$3,920
 $4,442
 $11,920
$6,220
 $2,394
 $3,920
Other Comprehensive Income (Loss) Net of Taxes:     
Net unrealized (loss) gain on derivatives, net of reclassifications(66) (126) 398
Net unrealized (loss) gain on investments, net of reclassifications(44) (70) 57
Other Comprehensive (Loss) Income Net of Taxes:     
Net unrealized gain (loss) on derivatives, net of reclassifications297
 (446) (66)
Net unrealized loss on investments, net of reclassifications(10) (58) (44)
Benefit plan net (loss) gain and prior service (cost) credit, net of amortization(799) 579
 (2,077)(425) 419
 (799)
Cumulative translation adjustment(169) (208) (504)(223) 401
 (169)
(1,078) 175
 (2,126)(361) 316
 (1,078)
Comprehensive Income Attributable to Merck & Co., Inc.$2,842
 $4,617
 $9,794
$5,859
 $2,710
 $2,842
The accompanying notes are an integral part of these consolidated financial statements.

Consolidated Balance Sheet
Merck & Co., Inc. and Subsidiaries
December 31
($ in millions except per share amounts)
2016 20152018 2017
Assets      
Current Assets      
Cash and cash equivalents$6,515
 $8,524
$7,965
 $6,092
Short-term investments7,826
 4,903
899
 2,406
Accounts receivable (net of allowance for doubtful accounts of $195 in 2016
and $165 in 2015) (excludes accounts receivable of $10 in 2015
classified in Other assets)
7,018
 6,484
Inventories (excludes inventories of $1,117 in 2016 and $1,569
in 2015 classified in Other assets - see Note 6)
4,866
 4,700
Accounts receivable (net of allowance for doubtful accounts of $119 in 2018
and $159 in 2017)
7,071
 6,873
Inventories (excludes inventories of $1,417 in 2018 and $1,187 in 2017
classified in Other assets - see Note 7)
5,440
 5,096
Other current assets4,389
 5,140
4,500
 4,299
Total current assets30,614
 29,751
25,875
 24,766
Investments11,416
 13,039
6,233
 12,125
Property, Plant and Equipment (at cost)      
Land412
 490
333
 365
Buildings11,439
 12,154
11,486
 11,726
Machinery, equipment and office furnishings14,053
 14,261
14,441
 14,649
Construction in progress1,871
 1,525
3,355
 2,301
27,775
 28,430
29,615
 29,041
Less: accumulated depreciation15,749
 15,923
16,324
 16,602
12,026
 12,507
13,291
 12,439
Goodwill18,162
 17,723
18,253
 18,284
Other Intangibles, Net17,305
 22,602
11,431
 14,183
Other Assets5,854
 6,055
7,554
 6,075
$95,377
 $101,677
$82,637
 $87,872
Liabilities and Equity      
Current Liabilities      
Loans payable and current portion of long-term debt$568
 $2,583
$5,308
 $3,057
Trade accounts payable2,807
 2,533
3,318
 3,102
Accrued and other current liabilities10,274
 11,216
10,151
 10,427
Income taxes payable2,239
 1,560
1,971
 708
Dividends payable1,316
 1,309
1,458
 1,320
Total current liabilities17,204
 19,201
22,206
 18,614
Long-Term Debt24,274
 23,829
19,806
 21,353
Deferred Income Taxes5,077
 6,535
1,702
 2,219
Other Noncurrent Liabilities8,514
 7,345
12,041
 11,117
Merck & Co., Inc. Stockholders’ Equity      
Common stock, $0.50 par value
Authorized - 6,500,000,000 shares
Issued - 3,577,103,522 shares in 2016 and 2015
1,788
 1,788
Common stock, $0.50 par value
Authorized - 6,500,000,000 shares
Issued - 3,577,103,522 shares in 2018 and 2017
1,788
 1,788
Other paid-in capital39,939
 40,222
38,808
 39,902
Retained earnings44,133
 45,348
42,579
 41,350
Accumulated other comprehensive loss(5,226) (4,148)(5,545) (4,910)
80,634
 83,210
77,630
 78,130
Less treasury stock, at cost:
828,372,200 shares in 2016 and 795,975,449 shares in 2015
40,546
 38,534
Less treasury stock, at cost:
984,543,979 shares in 2018 and 880,491,914 shares in 2017
50,929
 43,794
Total Merck & Co., Inc. stockholders’ equity40,088
 44,676
26,701
 34,336
Noncontrolling Interests220
 91
181
 233
Total equity40,308
 44,767
26,882
 34,569
$95,377
 $101,677
$82,637
 $87,872
The accompanying notes are an integral part of this consolidated financial statement.

Consolidated Statement of Equity
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions except per share amounts)
Common
Stock
 
Other
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Loss
 
Treasury
Stock
 
Non-
controlling
Interests
 Total
Common
Stock
 
Other
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Loss
 
Treasury
Stock
 
Non-
controlling
Interests
 Total
Balance January 1, 2014
$1,788
 $40,508
 $39,257
 $(2,197) $(29,591) $2,561
 $52,326
Balance January 1, 2016
$1,788
 $40,222
 $45,348
 $(4,148) $(38,534) $91
 $44,767
Net income attributable to Merck & Co., Inc.
 
 11,920
 
 
 
 11,920

 
 3,920
 
 
 
 3,920
Other comprehensive loss, net of tax
 
 
 (2,126) 
 
 (2,126)
Cash dividends declared on common stock ($1.77 per share)
 
 (5,156) 
 
 
 (5,156)
Treasury stock shares purchased
 
 
 
 (7,703) 
 (7,703)
AstraZeneca option exercise
 
 
 
 
 (2,400) (2,400)
Net income attributable to noncontrolling interests
 
 
 
 
 14
 14
Distributions attributable to noncontrolling interests
 
 
 
 
 (77) (77)
Share-based compensation plans and other
 (85) 
 
 2,032
 46
 1,993
Balance December 31, 20141,788
 40,423
 46,021
 (4,323) (35,262) 144
 48,791
Net income attributable to Merck & Co., Inc.
 
 4,442
 
 
 
 4,442
Other comprehensive income, net of tax
 
 
 175
 
 
 175
Cash dividends declared on common stock ($1.81 per share)
 
 (5,115) 
 
 
 (5,115)
Treasury stock shares purchased
 
 
 
 (4,186) 
 (4,186)
Changes in noncontrolling ownership interests
 (20) 
 
 
 (55) (75)
Net income attributable to noncontrolling interests
 
 
 
 
 17
 17
Distributions attributable to noncontrolling interests
 
 
 
 
 (15) (15)
Share-based compensation plans and other
 (181) 
 
 914
 
 733
Balance December 31, 20151,788
 40,222
 45,348
 (4,148) (38,534) 91
 44,767
Net income attributable to Merck & Co., Inc.
 
 3,920
 
 
 
 3,920
Other comprehensive loss, net of tax
 
 
 (1,078) 
 
 (1,078)
Other comprehensive loss, net of taxes
 
 
 (1,078) 
 
 (1,078)
Cash dividends declared on common stock ($1.85 per share)
 
 (5,135) 
 
 
 (5,135)
 
 (5,135) 
 
 
 (5,135)
Treasury stock shares purchased
 
 
 
 (3,434) 
 (3,434)
 
 
 
 (3,434) 
 (3,434)
Changes in noncontrolling ownership interests
 
 
 
 
 124
 124
Acquisition of The StayWell Company LLC
 
 
 
 
 124
 124
Net income attributable to noncontrolling interests
 
 
 
 
 21
 21

 
 
 
 
 21
 21
Distributions attributable to noncontrolling interests
 
 
 
 
 (16) (16)
 
 
 
 
 (16) (16)
Share-based compensation plans and other
 (283) 
 
 1,422
 
 1,139

 (283) 
 
 1,422
 
 1,139
Balance December 31, 2016$1,788
 $39,939
 $44,133
 $(5,226) $(40,546) $220
 $40,308
1,788
 39,939
 44,133
 (5,226) (40,546) 220
 40,308
Net income attributable to Merck & Co., Inc.
 
 2,394
 
 
 
 2,394
Other comprehensive income, net of taxes
 
 
 316
 
 
 316
Cash dividends declared on common stock ($1.89 per share)
 
 (5,177) 
 
 
 (5,177)
Treasury stock shares purchased
 
 
 
 (4,014) 
 (4,014)
Acquisition of Vallée S.A.
 
 
 
 
 7
 7
Net income attributable to noncontrolling interests
 
 
 
 
 24
 24
Distributions attributable to noncontrolling interests
 
 
 
 
 (18) (18)
Share-based compensation plans and other
 (37) 
 
 766
 
 729
Balance December 31, 20171,788
 39,902
 41,350
 (4,910) (43,794) 233
 34,569
Net income attributable to Merck & Co., Inc.
 
 6,220
 
 
 
 6,220
Adoption of new accounting standards (see Note 2)
 
 322
 (274) 
 
 48
Other comprehensive loss, net of taxes
 
 
 (361) 
 
 (361)
Cash dividends declared on common stock ($1.99 per share)
 
 (5,313) 
 
 
 (5,313)
Treasury stock shares purchased
 (1,000) 
 
 (8,091) 
 (9,091)
Net loss attributable to noncontrolling interests
 
 
 
 
 (27) (27)
Distributions attributable to noncontrolling interests
 
 
 
 
 (25) (25)
Share-based compensation plans and other
 (94) 
 
 956
 
 862
Balance December 31, 2018$1,788
 $38,808
 $42,579
 $(5,545) $(50,929) $181
 $26,882
The accompanying notes are an integral part of this consolidated financial statement.


Consolidated Statement of Cash Flows
Merck & Co., Inc. and Subsidiaries
Years Ended December 31
($ in millions)
2016 2015 20142018 2017 2016
Cash Flows from Operating Activities          
Net income$3,941
 $4,459
 $11,934
$6,193
 $2,418
 $3,941
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation and amortization5,441
 6,375
 6,691
4,519
 4,676
 5,471
Intangible asset impairment charges3,948
 162
 1,222
296
 646
 3,948
Charge for future payments related to collaboration license options650
 500
 
Provisional charge for one-time transition tax related to the enactment of U.S. tax legislation
 5,347
 
Charge related to the settlement of worldwide Keytruda patent litigation
625
 
 

 
 625
Foreign currency devaluation related to Venezuela
 876
 
Net charge related to the settlement of Vioxx shareholder class action litigation

 680
 
Gain on divestiture of Merck Consumer Care business
 
 (11,209)
Gain on AstraZeneca option exercise
 
 (741)
Loss on extinguishment of debt
 
 628
Equity income from affiliates(86) (205) (257)
Dividends and distributions from equity method affiliates16
 50
 185
Deferred income taxes(1,521) (764) (2,600)(509) (2,621) (1,521)
Share-based compensation300
 299
 278
348
 312
 300
Other313
 874
 34
978
 190
 213
Net changes in assets and liabilities:          
Accounts receivable(619) (480) (554)(418) 297
 (619)
Inventories206
 805
 79
(911) (145) 206
Trade accounts payable278
 (37) 593
230
 254
 278
Accrued and other current liabilities(2,018) (8) 1,635
(341) (922) (2,018)
Income taxes payable124
 (266) (21)827
 (3,291) 124
Noncurrent liabilities(809) (277) 190
(266) (123) (809)
Other237
 (5) (98)(674) (1,087) 237
Net Cash Provided by Operating Activities10,376
 12,538
 7,989
10,922
 6,451
 10,376
Cash Flows from Investing Activities          
Capital expenditures(1,614) (1,283) (1,317)(2,615) (1,888) (1,614)
Purchases of securities and other investments(15,651) (16,681) (24,944)(7,994) (10,739) (15,651)
Proceeds from sales of securities and other investments14,353
 20,413
 15,114
15,252
 15,664
 14,353
Divestiture of Merck Consumer Care business, net of cash divested
 
 13,951
Dispositions of other businesses, net of cash divested
 316
 1,169
Proceeds from AstraZeneca option exercise
 
 419
Acquisition of Cubist Pharmaceuticals, Inc., net of cash acquired
 (7,598) 
Acquisition of Idenix Pharmaceuticals, Inc., net of cash acquired
 
 (3,700)
Acquisitions of other businesses, net of cash acquired(780) (146) (181)
Acquisition of Bayer AG collaboration rights
 
 (1,000)
Cash inflows from net investment hedges29
 139
 195
Acquisitions, net of cash acquired(431) (396) (780)
Other453
 82
 (80)102
 38
 482
Net Cash Used in Investing Activities(3,210) (4,758) (374)
Net Cash Provided by (Used in) Investing Activities4,314
 2,679
 (3,210)
Cash Flows from Financing Activities          
Net change in short-term borrowings
 (1,540) (460)5,124
 (26) 
Payments on debt(2,386) (2,906) (6,617)(4,287) (1,103) (2,386)
Proceeds from issuance of debt1,079
 7,938
 3,146

 
 1,079
Purchases of treasury stock(3,434) (4,186) (7,703)(9,091) (4,014) (3,434)
Dividends paid to stockholders(5,124) (5,117) (5,170)(5,172) (5,167) (5,124)
Other dividends paid
 
 (77)
Proceeds from exercise of stock options939
 485
 1,560
591
 499
 939
Other(118) (61) 79
(325) (195) (118)
Net Cash Used in Financing Activities(9,044) (5,387) (15,242)(13,160) (10,006) (9,044)
Effect of Exchange Rate Changes on Cash and Cash Equivalents(131) (1,310) (553)
Net (Decrease) Increase in Cash and Cash Equivalents(2,009) 1,083
 (8,180)
Cash and Cash Equivalents at Beginning of Year8,524
 7,441
 15,621
Cash and Cash Equivalents at End of Year$6,515
 $8,524
 $7,441
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash(205) 457
 (131)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash1,871
 (419) (2,009)
Cash, Cash Equivalents and Restricted Cash at Beginning of Year (includes $4 million of restricted cash at January 1, 2018 included in Other Assets)6,096
 6,515
 8,524
Cash, Cash Equivalents and Restricted Cash at End of Year (includes $2 million of restricted cash at December 31, 2018 included in Other Assets)$7,967
 $6,096
 $6,515
The accompanying notes are an integral part of this consolidated financial statement.

Notes to Consolidated Financial Statements
Merck & Co., Inc. and Subsidiaries
($ in millions except per share amounts)
1.    Nature of Operations
Merck & Co., Inc. (Merck or the Company) is a global health care company that delivers innovative health solutions through its prescription medicines, vaccines, biologic therapies and animal health products. The Company’s operations are principally managed on a products basis and include four operating segments, which are the Pharmaceutical, Animal Health, Healthcare Services and Alliances segments. The Pharmaceutical segment isand Animal Health segments are the only reportable segment.segments.
The Pharmaceutical segment includes human health pharmaceutical and vaccine products marketed either directly by the Company or through joint ventures.products. Human health pharmaceutical products consist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. The Company sells these human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy benefit managers and other institutions. VaccineHuman health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. Sales of vaccines in most major European markets were marketed through the Company’sOn December 31, 2016, Merck and Sanofi Pasteur S.A. (Sanofi) terminated their equally-owned joint venture, Sanofi Pasteur MSD (SPMSD) joint venture until its termination on December 31, 2016. Beginning, which developed and marketed vaccines in Europe. In 2017, Merck will recordbegan recording vaccine sales and incurring costs as a result of operating its vaccines business in the European markets that were previously part of the SPMSD joint venture.venture, which was accounted for as an equity method affiliate.
The Company also has animal health operations that discover, develop, manufactureAnimal Health segment discovers, develops, manufactures and marketmarkets animal health products, including vaccines,pharmaceutical and vaccine products, for the prevention, treatment and control of disease in all major livestock and companion animal species, which the Company sells to veterinarians, distributors and animal producers.
The Company’s Healthcare Services segment provides services and solutions that focus on engagement, health analytics and clinical services to improve the value of care delivered to patients. Merck’s
The Alliances segment primarily includes resultsactivity from the Company’s relationship with AstraZeneca LP until the terminationrelated to sales of that relationship on June 30, 2014Nexium and Prilosec, which concluded in 2018 (see Note 8). On October 1, 2014, the Company divested its Consumer Care segment that developed, manufactured and marketed over-the-counter, foot care and sun care products (see Note 3)9).
2.    Summary of Accounting Policies
Principles of Consolidation — The consolidated financial statements include the accounts of the Company and all of its subsidiaries in which a controlling interest is maintained. Intercompany balances and transactions are eliminated. Controlling interest is determined by majority ownership interest and the absence of substantive third-party participating rights or, in the case of variable interest entities, by majority exposure to expected losses, residual returns or both. For those consolidated subsidiaries where Merck ownership is less than 100%, the outside shareholders’ interests are shown as Noncontrolling interests in equity. Investments in affiliates over which the Company has significant influence but not a controlling interest, such as interests in entities owned equally by the Company and a third party that are under shared control, are carried on the equity basis.
Acquisitions — In a business combination, the acquisition method of accounting requires that the assets acquired and liabilities assumed be recorded as of the date of the acquisition at their respective fair values with limited exceptions. Assets acquired and liabilities assumed in a business combination that arise from contingencies are generally recognized at fair value ifvalue. If fair value can reasonably be estimated. If the acquisition date fair value of an asset acquired or liability assumed that arises from a contingency cannot be determined, the asset or liability is recognized if probable and reasonably estimable; if these criteria are not met, no asset or liability is recognized. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Accordingly, the Company may be required to value assets at fair value measures that do not reflect the Company’s intended use of those assets. Any excess of the purchase price (consideration transferred) over the estimated fair values of net assets acquired is recorded as goodwill. Transaction costs and costs to restructure the acquired company are expensed as incurred. The operating results of the acquired business are reflected in the Company’s consolidated financial statements after the date of the acquisition. If the Company determines the assets acquired do not meet the

definition of a business under the acquisition method of accounting, the transaction will be accounted for as an acquisition of assets rather than a business combination and, therefore, no goodwill will be recorded. In an asset acquisition, acquired in-process research and development (IPR&D) with no alternative future use is charged to expense and contingent consideration is not recognized at the acquisition date.
Foreign Currency Translation — The net assets of international subsidiaries where the local currencies have been determined to be the functional currencies are translated into U.S. dollars using current exchange rates. The U.S. dollar effects that arise from translating the net assets of these subsidiaries at changing rates are recorded in the foreign currency translation account, which is included in Accumulated other comprehensive income (loss) (AOCI) and reflected as a separate component of equity. For those subsidiaries that operate in highly inflationary economies and for those subsidiaries where the U.S. dollar has been determined to be the functional currency, non-monetary foreign currency assets and liabilities are translated using historical rates, while monetary assets and liabilities are translated at current rates, with the U.S. dollar effects of rate changes included in Other (income) expense, net.
Cash Equivalents — Cash equivalents are comprised of certain highly liquid investments with original maturities of less than three months.
Inventories — Inventories are valued at the lower of cost or market.net realizable value. The cost of a substantial majority of domesticU.S. pharmaceutical and vaccine inventories is determined using the last-in, first-out (LIFO) method for both financial reporting and tax purposes. The cost of all other inventories is determined using the first-in, first-out (FIFO) method. Inventories consist of currently marketed products, as well as certain inventories produced in preparation for product launches that are considered to have a high probability of regulatory approval. In evaluating the recoverability of inventories produced in preparation for product launches, the Company considers the likelihood that revenue will be obtained from the future sale of the related inventory together with the status of the product within the regulatory approval process.
Investments — Investments in marketable debt and equity securities classified as available-for-sale are reported at fair value. Fair values of the Company’s investments in marketable debt securities are determined using quoted market prices in active markets for identical assets or liabilities or quoted prices for similar assets or liabilities or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Changes in fair value that are considered temporary are reported net of tax in Other Comprehensive Income (OCI). For declines in the fair value of equity securities that are considered other-than-temporary, impairment losses are charged to Other (income) expense, net. The Company considers available evidence in evaluating potential impairments of its investments in marketable debt securities, including the duration and extent to which fair value is less than cost and, for equity securities, the Company’s ability and intent to hold the investments. For debt securities, ancost. An other-than-temporary impairment has occurred if the Company does not expect to recover the entire amortized cost basis of the marketable debt security. If the Company does not intend to sell the impaired debt security, and it is not more likely than not it will be required to sell the debt security before the recovery of its amortized cost basis, the amount of the other-than-temporary impairment recognized in earnings, recorded in Other (income) expense, net, is limited to the portion attributed to credit loss. The remaining portion of the other-than-temporary impairment related to other factors is recognized in OCI. Realized gains and losses for both debt securities are included in Other (income) expense, net.
Investments in publicly traded equity securities are reported at fair value determined using quoted market prices in active markets for identical assets or quoted prices for similar assets or other inputs that are observable or can be corroborated by observable market data. Changes in fair value are included in Other (income) expense, net. Investments in equity securities without readily determinable fair values are recorded at cost, plus or minus subsequent observable price changes in orderly transactions for identical or similar investments, minus impairments. Such adjustments are recognized in Other (income) expense, net. Realized gains and losses for equity securities are included in Other (income) expense, net.
Revenue Recognition — RevenuesOn January 1, 2018, the Company adopted ASU 2014-09, Revenue from salesContracts with Customers, and subsequent amendments (ASC 606 or new guidance), using the modified retrospective method. Merck applied the new guidance to all contracts with customers within the scope of products arethe standard that were in effect on January 1, 2018 and recognized when title and riskthe cumulative effect of loss passesinitially applying the new guidance as an adjustment to the opening balance of retained earnings (see “Recently Adopted Accounting Standards” below). Comparative information for prior periods has not been restated and continues to be reported under the accounting standards in effect for those periods.

The new guidance requires an entity to recognize revenue to depict the transfer of goods or services to customers in an amount that reflects the consideration that it expects to be entitled to in exchange for those goods or services. The new guidance introduces a 5-step model to recognize revenue when or as control is transferred: identify the contract with a customer, typically upon delivery. identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations in the contract, and recognize revenue when or as the performance obligations are satisfied. Changes to the Company’s revenue recognition policy as a result of adopting ASC 606 are described below. See Note 19 for disaggregated revenue disclosures.
Recognition of revenue also requires reasonable assuranceevidence of a contract, probable collection of sales proceeds and completion of substantially all performance obligations. Domestically,Merck acts as the principal in substantially all of its customer arrangements and therefore records revenue on a gross basis. The majority of the Company’s contracts related to the Pharmaceutical and Animal Health segments have a single performance obligation - the promise to transfer goods. Shipping is considered immaterial in the context of the overall customer arrangement and damages or loss of goods in transit are rare. Therefore, shipping is not deemed a separately recognized performance obligation.
The vast majority of revenues from sales of products are recognized at a point in time when control of the goods is transferred to the customer, which the Company has determined is when title and risks and rewards of ownership transfer to the customer and the Company is entitled to payment. Certain Merck entities, including U.S. entities, have contract terms under which control of the goods passes to the customer upon shipment; however, either pursuant to the terms of the contract or as a business practice, Merck retains responsibility for goods lost or damaged in transit. Prior to the adoption of the new standard, Merck would recognize revenue for these entities upon delivery of the goods. Under the new guidance, the Company is now recognizing revenue at time of shipment for these entities.
The Company recognizes revenue from the sales of vaccines to the Federal government for placement into vaccine stockpiles in accordance with Securities and Exchange Commission (SEC) Interpretation, Commission Guidance Regarding Accounting for Sales of Vaccines and BioTerror Countermeasures to the Federal Government for Placement into the Pediatric Vaccine Stockpile or the Strategic National Stockpile. This interpretation allows companies to recognize revenue for sales of vaccines into U.S. government stockpiles even though these sales might not meet the criteria for revenue recognition under other accounting guidance.
For businesses within the Company’s Healthcare Services segment and certain services in the Animal Health segment, revenue is recognized over time, generally ratably over the contract term as services are provided. These service revenues are not material.
The nature of the Company’s business gives rise to several types of variable consideration including discounts and returns, which are estimated at the time of sale generally using the expected value method, although the most likely amount method is used for prompt pay discounts.
In the United States, sales discounts are issued to customers as direct discounts at the point-of-sale, indirectly through an intermediary wholesaler known(known as chargebacks,chargebacks), or indirectly in the form of rebates. Additionally, sales are generally made with a limited right of return under certain conditions. Revenues are recorded net of provisions for sales discounts and returns, which are established at the time of sale. In addition, revenues are recorded net of time value of money discounts if collection of accounts receivable is expected to be in excess of one year. Accruals
The U.S. provision for aggregate customer discounts covering chargebacks and rebates was $10.7 billion in 2018, $10.7 billion in 2017 and $9.7 billion in 2016. Chargebacks are discounts that occur when a contracted customer purchases through an intermediary wholesaler. The contracted customer generally purchases product from the wholesaler at its contracted price plus a mark-up. The wholesaler, in turn, charges the Company back for the difference between the price initially paid by the wholesaler and the contract price paid to the wholesaler by the customer. The provision for chargebacks is based on expected sell-through levels by the Company’s wholesale customers to contracted customers, as well as estimated wholesaler inventory levels. Rebates are reflected asamounts owed based upon definitive contractual agreements or legal requirements with private sector and public sector (Medicaid and Medicare Part D) benefit providers, after the final dispensing of the product by a direct reductionpharmacy to accounts receivable and accrualsa benefit plan participant. The provision for rebates is based on expected patient usage, as well as inventory levels in the distribution channel to determine the contractual obligation to the benefit providers. The Company uses historical customer segment utilization mix, sales forecasts, changes to product mix and price, inventory levels in the distribution channel, government pricing calculations and prior payment history in order to estimate the expected provision. Amounts accrued for aggregate customer discounts

are recorded as current liabilities.evaluated on a quarterly basis through comparison of information provided by the wholesalers, health maintenance organizations, pharmacy benefit managers, federal and state agencies, and other customers to the amounts accrued. The accrued balances relative to the provisions for chargebacks and rebates included in Accounts receivable and Accrued and other current liabilities were $196$245 million and $2.7$2.4 billion,, respectively, at December 31, 20162018 and $145were $198 million and $2.7$2.4 billion,, respectively, at December 31, 2015.2017.
Outside of the United States, variable consideration in the form of discounts and rebates are a combination of commercially-driven discounts in highly competitive product classes, discounts required to gain or maintain reimbursement, or legislatively mandated rebates. In certain European countries, legislatively mandated rebates are calculated based on an estimate of the government’s total unbudgeted spending and the Company’s specific payback obligation. Rebates may also be required based on specific product sales thresholds. The Company applies an estimated factor against its actual invoiced sales to represent the expected level of future discount or rebate obligations associated with the sale.
The Company maintains a returns policy that allows its U.S. pharmaceutical customers to return product within a specified period prior to and subsequent to the expiration date (generally, three to six months before and 12 months after product expiration). The estimate of the provision for returns is based upon historical experience with actual returns. Additionally, the Company considers factors such as levels of inventory in the distribution channel, product dating and expiration period, whether products have been discontinued, entrance in the market of generic competition, changes in formularies or launch of over-the-counter products, among others. Outside of the United States, returns are only allowed in certain countries on a limited basis.
Merck’s payment terms for U.S. pharmaceutical customers are typically net 36 days from receipt of invoice and for U.S. animal health customers are typically net 30 days from receipt of invoice; however, certain products, including Keytruda, have longer payment terms up to 90 days. Outside of the United States, payment terms are typically 30 days to 90 days, although certain markets have longer payment terms.
The following table provides the effects of adopting ASC 606 on the Consolidated Statement of Income:
Year Ended December 31, 2018As Reported Effects of Adopting ASC 606 Amounts Without Adoption of ASC 606
Sales$42,294
 $(2) $42,292
Cost of sales13,509
 (6) 13,503
Income before taxes8,701
 4
 8,705
Taxes on income2,508
 1
 2,509
Net income attributable to Merck & Co., Inc.6,220
 3
 6,223

The Company recognizes revenue fromfollowing table provides the saleseffects of vaccines toadopting ASC 606 on the Federal government for placement into vaccine stockpiles in accordance with Securities and Exchange Commission (SEC) Interpretation, Commission Guidance Regarding Accounting for Sales of Vaccines and BioTerror Countermeasures to the Federal Government for Placement into the Pediatric Vaccine Stockpile or the Strategic National Stockpile.Consolidated Balance Sheet:
December 31, 2018As Reported Effects of Adopting ASC 606 Amounts Without Adoption of ASC 606
Assets     
Accounts receivable$7,071
 $(13) $7,058
Inventories5,440
 7
 5,447
Liabilities     
Accrued and other current liabilities10,151
 (3) 10,148
Income taxes payable1,971
 (1) 1,970
Equity     
Retained earnings42,579
 (2) 42,577
Depreciation — Depreciation is provided over the estimated useful lives of the assets, principally using the straight-line method. For tax purposes, accelerated tax methods are used. The estimated useful lives primarily range from 25 to 45 years for Buildings, and from 3 to 15 years for Machinery, equipment and office furnishings. Depreciation expense was $1.4 billion in 2018, $1.5 billion in 2017 and $1.6 billion in 2016, $1.6 billion in 2015 and $2.5 billion in 2014.2016.

Advertising and Promotion Costs — Advertising and promotion costs are expensed as incurred. The Company recorded advertising and promotion expenses of $2.1 billion, $2.12.2 billion and $2.32.1 billion in 2016, 20152018, 2017 and 2014,2016, respectively.
Software Capitalization — The Company capitalizes certain costs incurred in connection with obtaining or developing internal-use software including external direct costs of material and services, and payroll costs for employees directly involved with the software development. Capitalized software costs are included in Property, plant and equipment and amortized beginning when the software project is substantially complete and the asset is ready for its intended use. Capitalized software costs associated with projects that are being amortized over 6 to 10 years (including the Company’s on-going multi-year implementation of an enterprise-wide resource planning system) were $452439 million and $421449 million, net of accumulated amortization at December 31, 20162018 and 2015,2017, respectively. All other capitalized software costs are being amortized over periods ranging from 3 to 5 years. Costs incurred during the preliminary project stage and post-implementation stage, as well as maintenance and training costs, are expensed as incurred.
Goodwill — Goodwill represents the excess of the consideration transferred over the fair value of net assets of businesses acquired. Goodwill is assigned to reporting units and evaluated for impairment on at least an annual basis, or more frequently if impairment indicators exist, by first assessing qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the Company concludes it is more likely than not that the fair value of a reporting unit is less than its carrying amount, a quantitative fair value test is performed. If the carrying value of a reporting unit is greater than its fair value, a goodwill impairment charge will be recorded for the difference (up to the carrying value of goodwill).
Acquired Intangibles — Acquired intangibles include products and product rights, tradenames and patents, which are initially recorded at fair value, assigned an estimated useful life, and are amortized primarily on a straight-line basis over their estimated useful lives ranging from 2 to 20 years (see Note 7)8). The Company periodically evaluates whether current facts or circumstances indicate that the carrying values of its acquired intangibles may not be recoverable. If such circumstances are determined to exist, an estimate of the undiscounted future cash flows of these assets, or appropriate asset groupings, is compared to the carrying value to determine whether an impairment exists. If the asset is determined to be impaired, the loss is measured based on the difference between the carrying value of the intangible asset and its fair value, which is determined based on the net present value of estimated future cash flows.
Acquired In-Process Research and Development — Acquired in-process research and development (IPR&D)IPR&D that the Company acquires through business combinations represents the fair value assigned to incomplete research projects which, at the time of acquisition, have not reached technological feasibility. The amounts are capitalized and are accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the projects. Upon successful completion of each project, Merck will make a determination as to the then usefulthen-useful life of the intangible asset, generally determined by the period in which the substantial majority of the cash flows are expected to be generated, and begin amortization. The Company tests IPR&D for impairment at least annually, or more frequently if impairment indicators exist, by first assessing qualitative factors to determine whether it is more likely than not that the fair value of the IPR&D intangible asset is less than its carrying amount. If the Company concludes it is more likely than not that the fair value is less than the carrying amount, a quantitative test that compares the fair value of the IPR&D intangible asset with its carrying value is performed. If the fair value is less than the carrying amount, an impairment loss is recognized in operating results.

Contingent Consideration — Certain of the Company’s business acquisitions involve the potential for future payment of consideration that is contingent upon the achievement of performance milestones, including product development milestones and royalty payments on future product sales. The fair value of contingent consideration liabilities is determined at the acquisition date using unobservable inputs. These inputs include the estimated amount and timing of projected cash flows, the probability of success (achievement of the contingent event) and the risk-adjusted discount rate used to present value the probability-weighted cash flows. Subsequent to the acquisition date, at each reporting period, the contingent consideration liability is remeasured at current fair value with changes (either expense or income) recorded in earnings. Changes in any of the inputs may result in a significantly different fair value adjustment.
Research and Development — Research and development is expensed as incurred. Upfront and milestone payments due to third parties in connection with research and development collaborations prior to regulatory approval are expensed as incurred. Payments due to third parties upon or subsequent to regulatory approval are capitalized and amortized over the shorter of the remaining license or product patent life. Amounts due from collaborative partners related to development activities are generally reflected as a reduction of research and development expenses when the specific milestone has been achieved. Nonrefundable advance payments for goods and services that will be used in future research and development activities are expensed when the

activity has been performed or when the goods have been received rather than when the payment is made. Research and development expenses include restructuring costs and IPR&D impairment charges in all periods.charges. In addition, research and development expenses include expense or income related to changes in the estimated fair value measurement of liabilities for contingent consideration. Research and development expenses also include upfront and milestone payments related to asset acquisitions and licensing transactions involving clinical development programs that have not yet received regulatory approval.
Collaborative Arrangements — Merck has entered into collaborative arrangements that provide the Company with varying rights to develop, produce and market products together with its collaborative partners. When Merck is the principal on sales transactions with third parties, the Company recognizes sales, cost of sales and selling, general and administrative expenses on a gross basis. Profit sharing amounts it pays to its collaborative partners are recorded within Cost of sales. When the collaborative partner is the principal on sales transactions with third parties, the Company records profit sharing amounts received from its collaborative partners as alliance revenue (within Sales). Alliance revenue is recorded net of cost of sales and includes an adjustment to share commercialization costs between the partners in accordance with the collaboration agreement. The adjustment is determined by comparing the commercialization costs Merck has incurred directly and reported within Selling, general and administrative expenses with the costs the collaborative partner has incurred. Research and development costs Merck incurs related to collaborations are recorded within Research and development expenses. Cost reimbursements to the collaborative partner or payments received from the collaborative partner to share these costs pursuant to the terms of the collaboration agreements are recorded as increases or decreases to Research and development expenses.
In addition, the terms of the collaboration agreements may require the Company to make payments based upon the achievement of certain developmental, regulatory approval or commercial milestones. Upfront and milestone payments payable by Merck to collaborative partners prior to regulatory approval are expensed as incurred and included in Research and development expenses. Payments due to collaborative partners upon or subsequent to regulatory approval are capitalized and amortized over the estimated useful life of the corresponding intangible asset to Cost of sales provided that future cash flows support the amounts capitalized. Sales-based milestones payable by Merck to collaborative partners are accrued when probable of being achieved and capitalized, subject to cumulative amortization catch-up. The amortization catch-up is calculated either from the time of the first regulatory approval for indications that were unapproved at the time the collaboration was formed, or from time of the formation of the collaboration for approved products. The related intangible asset that is recognized is amortized to Cost of sales over its remaining useful life, subject to impairment testing.
Share-Based Compensation — The Company expenses all share-based payments to employees over the requisite service period based on the grant-date fair value of the awards.
Restructuring Costs — The Company records liabilities for costs associated with exit or disposal activities in the period in which the liability is incurred. In accordance with existing benefit arrangements, employee termination costs are accrued when the restructuring actions are probable and estimable. When accruing these costs, the Company will recognize the amount within a range of costs that is the best estimate within the range. When no amount within the range is a better estimate than any other amount, the Company recognizes the minimum amount within the range. Costs for one-time termination benefits in which the employee is required to render service until termination in order to receive the benefits are recognized ratably over the future service period.
Contingencies and Legal Defense Costs — The Company records accruals for contingencies and legal defense costs expected to be incurred in connection with a loss contingency when it is probable that a liability has been incurred and the amount can be reasonably estimated.
Taxes on Income — Deferred taxes are recognized for the future tax effects of temporary differences between financial and income tax reporting based on enacted tax laws and rates. The Company evaluates tax positions to determine whether the benefits of tax positions are more likely than not of being sustained upon audit based on the technical merits of the tax position. For tax positions that are more likely than not of being sustained upon audit, the Company recognizes the largest amount of the benefit that is greater than 50% likely of being realized upon ultimate settlement in the financial statements. For tax positions that are not more likely than not of being sustained upon audit, the Company does not recognize any portion of the benefit in the financial statements. The Company recognizes interest

and penalties associated with uncertain tax positions as a component of Taxes on income in the Consolidated Statement of Income.
Use of Estimates — The consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States (GAAP) and, accordingly, include certain amounts that are based on management’s best estimates and judgments. Estimates are used when accounting for amounts recorded in connection with acquisitions, including initial fair value determinations of assets and liabilities, primarily IPR&D, other intangible assets and contingent consideration, as well as subsequent fair value measurements. Additionally, estimates are used in determining such items as provisions for sales discounts and returns, depreciable and amortizable lives, recoverability of inventories, including those produced in preparation for product launches, amounts recorded for contingencies, environmental liabilities, accruals for contingent sales-based milestone payments and other reserves, pension and other postretirement benefit plan assumptions, share-based compensation assumptions, restructuring costs, impairments of long-lived assets (including intangible assets and

goodwill) and investments, and taxes on income. Because of the uncertainty inherent in such estimates, actual results may differ from these estimates.
Reclassifications — Certain reclassifications have been made to prior year amounts to conform to the current year presentation.
Recently Adopted Accounting Standards — In the first quarter of 2016, the Company adopted accounting guidance issued byMay 2014, the Financial Accounting Standards Board (FASB) in April of 2015, which requires debt issuance costs to be presented as a direct deduction from the carrying amount of that debt on the balance sheet as opposed to being presented as a deferred charge. Approximately $100 million of debt issuance costs were reclassified in the first quarter of 2016 as a result of the adoption of the new standard. Prior period amounts have been recast to conform to the new presentation.
In the second quarter of 2016, the Company elected to early adopt an accounting standards update issued by the FASB in March of 2016 intended to simplify the accounting and reporting for employee share-based payment transactions. Among other provisions, the new standard requires that excess tax benefits and deficiencies that arise upon vesting or exercise of share-based payments be recognized in the income statement (as opposed to previous guidance under which tax effects were recorded to Other paid-in-capital in certain instances). This aspect of the new guidance, which was required to be adopted prospectively, resulted in the recognition of $79 million of excess tax benefits in Taxes on income in 2016 arising from share-based payments. The new guidance also amended the presentation of certain share-based payment items in the statement of cash flows. Cash flows related to excess income tax benefits are now classified as an operating activity (formerly included as a financing activity). The Company elected to adopt this aspect of the new guidance prospectively. The standard also clarified that cash payments made to taxing authorities on the employees’ behalf for shares withheld should be presented as a financing activity. This aspect of the guidance was adopted retrospectively; accordingly, the Company reclassified $117 million and $129 million of such payments from operating activities to financing activities in the Consolidated Statement of Cash Flows for the years ended December 31, 2015 and 2014, respectively, to conform to the current presentation. The Company has elected to continue to estimate the impact of forfeitures when determining the amount of compensation cost to be recognized each period rather than account for them as they occur.
In the fourth quarter of 2016, the Company elected to early adopt an accounting standards update issued by the FASB on January 5, 2017 intended to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. If substantially all of the fair value of gross assets included in a transaction is concentrated in a single asset (or a group of similar assets), the assets would not represent a business. To be considered a business, the assets in the transaction need to include an input and a substantive process that together significantly contribute to the ability to create outputs. Prior to the adoption of the new guidance, an acquisition or disposition would be considered a business if there were inputs, as well as processes that when applied to those inputs had the ability to create outputs. Entities are permitted to apply the updated guidance to transactions occurring before the guidance was issued as long as the applicable financial statements have not been issued. Accordingly, the Company elected to adopt this guidance prospectively as of October 1, 2016.
Recently Issued Accounting Standards — In May 2014, the FASB issued amended accounting guidance on revenue recognition (ASU 2014-09) that will be appliedapplies to all contracts with customers. The objective of the new guidance is to improve comparability of revenue recognition practices across entities and to provide more useful information to users of financial statements through improved disclosure requirements. In August 2015, the FASB approved a one-year deferral of the effective date making this guidance effective for interim and annual periods beginning in 2018. The new standard permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of adopting the guidance being recognized at the date of initial application (modified retrospective method). The Company will adopt the new standard onwas effective as of January 1, 2018 and currently plans to usewas adopted using the modified retrospective method. The majority of the Company’s business is ship and bill and, on that primary revenue stream, Merck does not expect significant differences. However, the Company’s analysis is preliminary and subject to change. Merck has not completed its assessment of multiple element arrangements and certain discount and trade promotion programs.Company recorded a cumulative-effect adjustment upon adoption increasing Retained earnings by $5 million.

In January 2016, the FASB issued revised guidance for the accounting and reporting of financial instruments.instruments (ASU 2016-01) and in 2018 issued related technical corrections (ASU 2018-03). The new guidance requires that equity investments with readily determinable fair values currently classified as available for sale be measured at fair value with changes in fair value recognized in net income. The new guidance also simplifies the impairment testing ofCompany has elected to measure equity investments without readily determinable fair values at cost, adjusted for subsequent observable price changes and changesless impairments, which will be recognized in net income. The new guidance also changed certain disclosure requirements. ASU 2016-01 was effective as of January 1, 2018 and was adopted using a modified retrospective approach. The Company recorded a cumulative-effect adjustment upon adoption increasing Retained earnings by $8 million. ASU 2018-03 was also adopted as of January 1, 2018 on a prospective basis and did not result in any additional impacts upon adoption.
In October 2016, the FASB issued guidance on the accounting for the income tax consequences of intra-entity transfers of assets other than inventory (ASU 2016-16). The new guidance requires the recognition of the income tax consequences of an intra-entity transfer of an asset (with the exception of inventory) when the intra-entity transfer occurs, replacing the prohibition against doing so. The current exception to defer the recognition of any tax impact on the transfer of inventory within the consolidated entity until it is sold to a third party remains unaffected. The new standard was effective as of January 1, 2018 and was adopted using a modified retrospective approach. The Company recorded a cumulative-effect adjustment upon adoption increasing Retained earnings by $54 million with a corresponding decrease to Deferred Income Taxes.
In August 2017, the FASB issued new guidance on hedge accounting (ASU 2017-12) that is intended to more closely align hedge accounting with companies’ risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The new guidance makes more financial and nonfinancial hedging strategies eligible for hedge accounting, amends the presentation and disclosure requirements, and changes how companies assess effectiveness. The Company elected to early adopt this guidance as of January 1, 2018 on a modified retrospective basis. The new guidance was applied to all existing hedges as of the adoption date. For fair value hedges of interest rate risk outstanding as of the date of adoption, the Company recorded a cumulative-effect adjustment upon adoption to the basis adjustment on the hedged item resulting from applying the benchmark component of the coupon guidance. This adjustment decreased Retained earnings by $11 million. Also, in

accordance with the transition provisions of ASU 2017-12, the Company was required to eliminate the separate measurement of ineffectiveness for its cash flow hedging instruments existing as of the adoption date through a cumulative-effect adjustment to retained earnings; however, all such amounts were de minimis.
In February 2018, the FASB issued new guidance to address a narrow-scope financial reporting issue that arose as a consequence of the Tax Cuts and Jobs Act of 2017 (TCJA) (ASU 2018-02). Existing guidance requires that deferred tax liabilities and assets be adjusted for a change in tax laws or rates with the effect included in income from continuing operations in the reporting period that includes the enactment date. That guidance is effectiveapplicable even in situations in which the related income tax effects of items in accumulated other comprehensive income were originally recognized in other comprehensive income (rather than in net income), such as amounts related to benefit plans and hedging activity. As a result, the tax effects of items within accumulated other comprehensive income do not reflect the appropriate tax rate (the difference is referred to as stranded tax effects). The new guidance allows for interim and annual periods beginning in 2018. Early adoption is not permitted.a reclassification of the stranded tax effects resulting from the TCJA from accumulated other comprehensive income to retained earnings thereby eliminating these stranded tax effects. The Company elected to early adopt the new guidance in the first quarter of 2018 and reclassified the stranded income tax effects of the TCJA, increasing Accumulated other comprehensive loss in the amount of $266 million with a corresponding increase to Retained earnings (see Note 18). The Company’s policy for releasing disproportionate income tax effects from Accumulated other comprehensive lossis currently assessingto utilize the item-by-item approach.
The impact of adopting the above standards is as follows:
($ in millions)ASU 2014-09 (Revenue) ASU 2016-01 (Financial Instruments) ASU 2016-16 (Intra-Entity Transfers of Assets Other than Inventory) ASU 2017-12 (Derivatives and Hedging) ASU 2018-02 (Reclassification of Certain Tax Effects) Total
Assets - Increase (Decrease)           
Accounts receivable$5
         $5
Liabilities - Increase (Decrease)           
Income Taxes Payable      (3)   (3)
Debt      14
   14
Deferred Income Taxes    (54)     (54)
Equity - Increase (Decrease)           
Retained earnings5
 8
 54
 (11) 266
 322
Accumulated other comprehensive loss  (8)     (266) (274)
In March 2017, the FASB issued amended guidance on retirement benefits (ASU 2017-07) related to net periodic benefit cost for defined benefit plans that requires entities to (1) disaggregate the current service cost component from the other components of net benefit cost and present it with other employee compensation costs in the income statement within operations if such a subtotal is presented; (2) present the other components of net benefit cost separately in the income statement and outside of income from operations; and (3) only capitalize the service cost component when applicable. The Company adopted the new standard as of January 1, 2018 using a retrospective transition method as to the requirement for separate presentation in the income statement of service costs and other components, and a prospective transition method as to the requirement to limit the capitalization of benefit costs to the service cost component. The Company utilized a practical expedient that permits it to use the amounts disclosed in its pension and other postretirement benefit plan note for the prior comparative periods as the estimation basis for applying the retrospective presentation requirements. Upon adoption, net periodic benefit cost (credit) other than service cost of $(512) million and $(531) million for the years ended December 31, 2017 and 2016, respectively, was reclassified to Other (income) expense, net from the previous classification within Cost of sales, Selling, general and administrative expenses and Research and development expenses (see Note 15).
In August 2016, the FASB issued guidance on the classification of certain cash receipts and payments in the statement of cash flows intended to reduce diversity in practice. The Company adopted the new standard effective as of January 1, 2018 using a retrospective application. There were no changes to the presentation of the Consolidated Statement of Cash Flows in the previous years presented as a result of adopting the new standard.

In November 2016, the FASB issued guidance requiring that amounts generally described as restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new standard was effective as of January 1, 2018 and was adopted using a retrospective application. The adoption of the new guidance did not have a material effect on the Company’s Consolidated Statement of Cash Flows.
In May 2017, the FASB issued guidance clarifying when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The Company adopted the new standard effective as of January 1, 2018 and will apply the new guidance to future share-based payment award modifications should they occur.
In January 2017, the FASB issued guidance that provides for the elimination of Step 2 from the goodwill impairment test. Under the new guidance, impairment charges are recognized to the extent the carrying amount of a reporting unit exceeds its fair value with certain limitations. The Company adopted the new standard in the fourth quarter of 2018 and applied the new guidance for purposes of its fourth quarter goodwill impairment assessment. The adoption of the new guidance had an immaterial effect on its consolidated financial statements.
Recently Issued Accounting Standards Not Yet Adopted —In February 2016, the FASB issued new accounting guidance for the accounting and reporting of leases.leases and subsequently issued several updates to the new guidance. The new guidance requires that lessees recognize a right-of-use asset and a lease liability recorded on the balance sheet for each of its leases (other than leases that meet the definition of a short-term lease). Leases will be classified as either operating or finance. Operating leases will result in straight-line expense in the income statement (similar to current operating leases) while finance leases will result in more expense being recognized in the earlier years of the lease term (similar to current capital leases). The new guidancestandard is effective as of January 1, 2019 and will be effectiveadopted using a modified retrospective approach. Merck will elect the transition method that allows for interim and annual periodsapplication of the standard at the adoption date rather than at the beginning of the earliest comparative period presented in 2019. Early adoption is permitted.the financial statements. The Company is currently evaluatingintends to elect available practical expedients. Merck has implemented a lease accounting software application and has completed data validation of the impactCompany’s portfolio of leases, including its assessment of potential embedded leases. Upon adoption, the Company anticipates it will recognize approximately $1 billion of additional assets and corresponding liabilities on its consolidated financial statements.balance sheet, subject to finalization.
In June 2016, the FASB issued amended guidance on the accounting for credit losses on financial instruments within its scope.instruments. The guidance introduces an expected loss model for estimating credit losses, replacing the incurred loss model. The new guidance also changes the impairment model for available-for-sale debt securities, requiring the use of an allowance to record estimated credit losses (and subsequent recoveries). The new guidance is effective for interim and annual periods beginning in 2020, with earlier application permitted in 2019. The Company is currently evaluating the impact of adoption on its consolidated financial statements.
In August 2016, the FASB issued guidance on the classification of certain cash receipts and payments in the statement of cash flows intended to reduce diversity in practice. The guidance is effective for interim and annual periods beginning in 2018. Early adoption is permitted. The guidance is to be applied retrospectively to all periods presented but may be applied prospectively if retrospective application would be impracticable. The Company is currently evaluating the effect of the standard on its Consolidated Statement of Cash Flows.
In October 2016, the FASB issued guidance on the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Under existing guidance, the recognition of current and deferred income taxes for an intra-entity asset transfer is prohibited until the asset has been sold to a third party. The new guidance will require the recognition of the income tax consequences of an intra-entity transfer of an asset (with the exception of inventory) when the intra-entity transfer occurs. The guidance is effective for interim and annual periods beginning in 2018. Early adoption is permitted. The new guidance is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings in the beginning of the period of adoption. The Company does not anticipateis currently evaluating the adoptionimpact of the new guidance will have a material effectadoption on its consolidated financial statements.
In November 2016,April 2018, the FASB issued new guidance requiring that amounts generally described as restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statementaccounting for costs incurred to implement a cloud computing arrangement that is considered a service arrangement. The new guidance requires the capitalization of cash flows.such costs, aligning it with the accounting for costs associated with developing or obtaining internal-use software. The new guidance is effective for interim and annual periods beginning in 2018 and should be applied using a2020. Early adoption is permitted, including adoption in any interim period. Prospective adoption for eligible costs incurred on or after the date of adoption or retrospective transition method to each period presented. Early adoption is permitted. The Company is currently evaluating the effectimpact of the standardadoption on its Consolidated Statement of Cash Flows.consolidated financial statements and may elect to early adopt this guidance.
In January 2017,November 2018, the FASB issued new guidance that provides for collaborative arrangements intended to reduce diversity in practice by clarifying whether certain transactions between collaborative arrangement participants should be accounted for under the elimination of Step 2 from the goodwill impairment test. If impairment charges are recognized, the amount recorded will be the amount by which the carrying amount exceeds the reporting unit’s fair value with certain limitations.recently issued guidance on revenue recognition (ASC 606). The new guidance is effective for interim and annual periods beginning in 2021.2020. Early adoption is permitted, including adoption in any interim period. The new guidance is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings. The Company does not anticipateis currently evaluating the adoptionimpact of the new guidance will have a material effectadoption on its consolidated financial statements.


3.    Acquisitions, Divestitures, Research Collaborations and License Agreements
The Company continues to acquirepursue the acquisition of businesses and establishestablishment of external alliances such as research collaborations and licensing agreements to complement its internal research capabilities. These arrangements often include upfront payments, as well as expense reimbursements or payments to the third party, and milestone, royalty or profit share payments,arrangements, contingent upon the occurrence of certain future events linked to the success of the asset in development. The Company also reviews its marketed products and pipeline to examine candidates which may provide more value through out-licensing and, as part of its portfolio assessment process, may also divest certain assets. Pro forma financial information for acquired businesses is not presented if the historical financial results of the acquired entity are not significant when compared with the Company’s financial results.
Recently Announced Transaction
In December 2018, Merck and privately held Antelliq Group (Antelliq) signed a definitive agreement under which Merck will acquire Antelliq from funds advised by BC Partners. Antelliq is a leader in digital animal identification, traceability and monitoring solutions. These solutions help veterinarians, farmers and pet owners gather critical data to improve management, health and well-being of livestock and pets. Merck will make a cash payment of approximately €2.1 billion (approximately $2.4 billion based on exchange rates at the time of the announcement) to acquire all outstanding shares of Antelliq and will assume Antelliq’s debt of €1.1 billion (approximately $1.3 billion), which it intends to repay shortly after the closing of the acquisition. The transaction is subject to clearance by antitrust and competition law authorities and other customary closing conditions, and is expected to close in the second quarter of 2019.
2018 Transactions
In 2018, the Company recorded an aggregate charge of $423 million within Cost of sales in conjunction with the termination of a collaboration agreement entered into in 2014 with Samsung Bioepis Co., Ltd. (Samsung) for insulin glargine. The charge reflects a termination payment of $155 million, which represents the reimbursement of all fees previously paid by Samsung to Merck under the agreement, plus interest, as well as the release of Merck’s ongoing obligations under the agreement. The charge also included fixed asset abandonment charges of $137 million, inventory write-offs of $122 million, as well as other related costs of $9 million. The termination of this agreement has no impact on the Company’s other collaboration with Samsung.
In June 2018, Merck acquired Viralytics Limited (Viralytics), an Australian publicly traded company focused on oncolytic immunotherapy treatments for a range of cancers, for AUD 502 million ($378 million). The transaction provided Merck with full rights to Cavatak (V937, formerly CVA21), Viralytics’s investigational oncolytic immunotherapy. Cavatak is based on Viralytics’s proprietary formulation of an oncolytic virus (Coxsackievirus Type A21) that has been shown to preferentially infect and kill cancer cells. Cavatak is currently being evaluated in multiple Phase 1 and Phase 2 clinical trials, both as an intratumoral and intravenous agent, including in combination with Keytruda. Under a previous agreement between Merck and Viralytics, a study is investigating the use of the Keytruda and Cavatak combination in melanoma, prostate, lung and bladder cancers. The transaction was accounted for as an acquisition of an asset. Merck recorded net assets of $34 million (primarily cash) at the acquisition date and Research and development expenses of $344 million in 2018 related to the transaction. There are no future contingent payments associated with the acquisition.
In March 2018, Merck and Eisai Co., Ltd. (Eisai) entered into a strategic collaboration for the worldwide co-development and co-commercialization of Lenvima, an orally available tyrosine kinase inhibitor discovered by Eisai (see Note 4).
2017 Transactions
In October 2017, Merck acquired Rigontec GmbH (Rigontec). Rigontec is a leader in accessing the retinoic acid-inducible gene I pathway, part of the innate immune system, as a novel and distinct approach in cancer immunotherapy to induce both immediate and long-term anti-tumor immunity. Rigontec’s lead candidate, MK-4621 (formerly RGT100), is currently in Phase I development evaluating treatment in patients with various tumors. Under the terms of the agreement, Merck made an upfront cash payment of €119 million ($140 million) and may make additional contingent payments of up to €349 million (of which €184 million are related to the achievement of research milestones and regulatory approvals and €165 million are related to the achievement of commercial targets). The transaction was accounted for as an acquisition of an asset and the upfront payment is reflected within Research and development expenses in 2017.

In July 2017, Merck and AstraZeneca PLC (AstraZeneca) entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza for multiple cancer types (see Note 4).
In March 2017, Merck acquired a controlling interest in Vallée S.A. (Vallée), a leading privately held producer of animal health products in Brazil. Vallée has an extensive portfolio of products spanning parasiticides, anti-infectives and vaccines that include products for livestock, horses, and companion animals. Under the terms of the agreement, Merck acquired 93.5% of the shares of Vallée for $358 million. Of the total purchase price, $176 million was placed into escrow pending resolution of certain contingent items. The transaction was accounted for as an acquisition of a business. Merck recognized intangible assets of $297 million related to currently marketed products, net deferred tax liabilities of $102 million, other net assets of $32 million and noncontrolling interest of $25 million. In addition, the Company recorded liabilities of $37 million for contingencies identified at the acquisition date and corresponding indemnification assets of $37 million, representing the amounts to be reimbursed to Merck if and when the contingent liabilities are paid. The excess of the consideration transferred over the fair value of net assets acquired of $156 million was recorded as goodwill. The goodwill was allocated to the Animal Health segment and is not deductible for tax purposes. The estimated fair values of identifiable intangible assets related to currently marketed products were determined using an income approach. The probability-adjusted future net cash flows of each product were discounted to present value utilizing a discount rate of 15.5%. Actual cash flows are likely to be different than those assumed. The intangible assets related to currently marketed products are being amortized over their estimated useful lives of 15 years. In the fourth quarter of 2017, Merck acquired an additional 4.5% interest in Vallée for $18 million, which reduced the noncontrolling interest related to Vallée.
2016 Transactions
In July 2016, Merck acquired Afferent Pharmaceuticals (Afferent), a privately held pharmaceutical company focused on the development of therapeutic candidates targeting the P2X3 receptor for the treatment of common, poorly-managed, neurogenic conditions. Afferent’s lead investigational candidate, MK-7264 (formerly AF-219), gefapixant, is a selective, non-narcotic, orally-administered P2X3 antagonist being evaluated in a Phase 2b clinical trial for the treatment of refractory, chronic cough as well as in a Phase 2 clinical trial in idiopathic pulmonary fibrosis with cough.and for the treatment of endometriosis-related pain. Total consideration transferred of $510 million included cash paid for outstanding Afferent shares of $487 million, as well as share-based compensation payments to settle equity awards attributable to precombination service and cash paid for transaction costs on behalf of Afferent. In addition, former Afferent shareholders are eligible to receive a total of up to an additional $750 million contingent upon the attainment of certain clinical development and commercial milestones for multiple indications and candidates, including MK-7264. This transaction was accounted for as an acquisition of a business; accordingly, the assets acquired and liabilities assumed were recorded at their respective fair values as of the acquisition date.business. The Company determined the fair value of the contingent consideration was $223 million at the acquisition date utilizing a probability-weighted estimated cash flow stream adjusted for the expected timing of each payment using an appropriate discount rate dependent on the nature and timing of the milestone payment. Merck recognized an intangible asset for in-process research and development (IPR&D)IPR&D of $832 million, net deferred tax liabilities of $258 million, and other net assets of $29 million (primarily consisting of cash acquired). The excess of the consideration transferred over the fair value of net assets acquired of $130 million was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair value of the identifiable intangible asset related to IPR&D was determined using an income approach, through which fair value is estimated based upon theapproach. The asset’s probability-adjusted future net cash flows which reflects the stage of development of the project and the associated probability of successful completion. The net cash flows were then discounted to present value using a discount rate of 11.5%. Actual cash flows are likely to be different than those assumed.
Also in July 2016, Merck, through its wholly owned subsidiary Healthcare Services & Solutions, LLC, acquired In 2018, as a majority ownership interest in The StayWell Company LLC (StayWell), a portfolio company of Vestar Capital Partners (Vestar). StayWell is a health engagement company that helps its clients engage and educate people to improve health and business results. Under the termsresult of the transaction, Merck paid $150 million for a majority ownership interest. Additionally, Merck provided StayWell with a $150 million intercompany loan to pay down preexisting third-party debt. Merck has an option to buy, and Vestar has an option to require Merck to buy, some or all of Vestar’s remaining ownership interest at fair value beginning three years from the acquisition date. This transaction was accounted for as an acquisitionachievement of a business.clinical development milestone, Merck recognized intangible assets of $238made a $175 million deferred tax liabilities of $84 million, other net liabilities of $5 million and noncontrolling interest of $124 million. The excess of the consideration transferred over thepayment, which was accrued for at estimated fair value of net assets acquired of $275 million was recorded as goodwill and is largely attributable to anticipated synergies expected to arise after the acquisition. The goodwill was allocated to the Healthcare Services segment and is not deductible for tax purposes. The intangible assets recognized primarily relate to customer relationships, which are being amortized over a 10-year useful life, and medical information and solutions content, which are being amortized over a five-year useful life.
Additionally, in July 2016, Merck announced it had executed an agreement to acquire a controlling interest in Vallée S.A. (Vallée), a leading privately held producer of animal health products in Brazil. Vallée has an extensive portfolio of products spanning parasiticides, anti-infectives and vaccines that include products for livestock, horses, and companion animals. Under the terms of the agreement, Merck will acquire approximately 93% of the shares of Vallée for approximately $400 million, based on exchange rates at the time of the announcement. This agreement is subject to regulatory review and certain closing conditions.

acquisition as noted above. The contingent consideration liability was then remeasured at current fair value at each subsequent reporting period until payment was made (see Note 6).
In June 2016, Merck and Moderna Therapeutics (Moderna) entered into a strategic collaboration and license agreement to develop and commercialize novel messenger RNA (mRNA)-based personalized cancer vaccines. The development program will entail multiple studies in several types of cancer and include the evaluation of mRNA-based personalized cancer vaccines in combination with Merck’s Keytruda. Pursuant to the terms of the agreement, Merck made an upfront cash payment to Moderna of $200 million, which was recorded in Research and development expenses. Following human proof of concept studies, Merck has the right to elect to make an additional payment to Moderna. If Merck exercises this right, the two companies will then equally share costcosts and profits under a worldwide collaboration for the development of personalized cancer vaccines. Moderna will have the right to elect to co-promote the personalized cancer vaccines in the United States. The agreement entails exclusivity around combinations with Keytruda. Moderna and Merck will each have the ability to combine mRNA-based personalized cancer vaccines with other (non-PD-1) agents.

In January 2016, Merck acquired IOmet Pharma Ltd (IOmet), a privately held UK-based drug discovery company focused on the development of innovative medicines for the treatment of cancer, with a particular emphasis on the fields of cancer immunotherapy and cancer metabolism. The acquisition providesprovided Merck with IOmet’s preclinical pipeline of IDO (indoleamine-2,3-dioxygenase 1), TDO (tryptophan-2,3-dioxygenase), and dual-acting IDO/TDO inhibitors. The transaction was accounted for as an acquisition of a business. Total purchase consideration in the transaction included a cash payment of $150 million and future additional milestone payments of up to $250 million that are contingent upon certain clinical and regulatory milestones being achieved. The Company determined the fair value of the contingent consideration was $94 million at the acquisition date utilizing a probability-weighted estimated cash flow stream adjusted for the expected timing of each payment utilizing a discount rate of 10.5%. Merck recognized intangible assets for IPR&D of $155 million and net deferred tax assets of $32 million. The excess of the consideration transferred over the fair value of net assets acquired of $57 million was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair values of the identifiable intangible assets related to IPR&D were determined using an income approach. The assets’ probability-adjusted future net cash flows were then discounted to present value also using a discount rate of 10.5%. Actual cash flows are likely to be different than those assumed.

2015 Transactions
In December 2015, the Company divested its remaining ophthalmics portfolio in international markets to Mundipharma Ophthalmology Products Limited. Merck received consideration of approximately $170 million and recognized a gain of $147 million recorded in Other (income) expense, net in 2015.
In July 2015, Merck acquired cCAM Biotherapeutics Ltd. (cCAM), a privately held biopharmaceutical company focused on the discovery and development of novel cancer immunotherapies. Total purchase consideration in the transaction included an upfront payment of $96 million in cash and future additional payments of up to $510 million associated with the attainment of certain clinical development, regulatory and commercial milestones. The transaction was accounted for as an acquisition of a business. Merck recognized an intangible asset for IPR&D of $180 million related to CM-24, a monoclonal antibody, as well as a liability for contingent consideration of $105 million, goodwill of $14 million and other net assets of $7 million. During 2016,2017, as a result of unfavorable efficacy data, the Company determined that it would discontinue development of the pipeline program. Accordingly, the Company recorded an IPR&D impairment charge of $180 million related to CM-24 and reversed the related liability for contingent consideration, which had a fair value of $116 million at the time of program discontinuation. Both the IPR&D impairment charge and the income related to the reduction in the liability for contingent consideration were recorded in Research and development expenses in 2016.
Also in July 2015, Merck and Allergan plc (Allergan) entered into an agreement pursuant to which Allergan acquired the exclusive worldwide rights to MK-1602 and MK-8031, Merck’s investigational small molecule oral calcitonin gene-related peptide (CGRP) receptor antagonists, which are being developed for the treatment and prevention of migraine. Under the terms of the agreement, Allergan acquired these rights for upfront payments of $250 million, of which $125 million was paid in August 2015 upon closing of the transaction and the remaining $125 million was paid in April of 2016. The Company recorded a gain of $250 million within Other (income) expense, net in 2015 related to the transaction. Allergan is fully responsible for development of the CGRP programs, as well as manufacturing and commercialization upon approval and launch of the products. Under the agreement, Merck is entitled to receive potential development and commercial milestone payments and royalties at tiered double-digit rates based on commercialization

of the programs. During 2016, Merck recognized gains of $100 million within Other (income) expense, net resulting from payments by Allergan for the achievement of research anda clinical development milestones.
In February 2015, Merck and NGM Biopharmaceuticals, Inc. (NGM), a privately held biotechnology company, entered into a multi-year collaboration to research, discover, develop and commercialize novel biologic therapies across a wide range of therapeutic areas. Under the terms of the agreement,milestone, Merck made an upfronta $100 million payment, to NGM of $94 million, which was included in Research and development expenses, and purchased a 15% equity stake in NGMaccrued for $106 million. Merck committed up to $250 million to fund all of NGM’s efforts under the initial five-year term of the collaboration, with the potential for additional funding if certain conditions are met. Prior to Merck initiating a Phase 3 study for a licensed program, NGM may elect to either receive milestone and royalty payments or, in certain cases, to co-fund development and participate in a global cost and revenue share arrangement of up to 50%. The agreement also provides NGM with the option to participate in the co-promotion of any co-funded program in the United States. Merck has the option to extend the research agreement for two additional two-year terms.
In January 2015, Merck acquired Cubist Pharmaceuticals, Inc. (Cubist), a leader in the development of therapies to treat serious infections caused by a broad range of bacteria. Total consideration transferred of $8.3 billion included cash paid for outstanding Cubist shares of $7.8 billion, as well as share-based compensation payments to settle equity awards attributable to precombination service and cash paid for transaction costs on behalf of Cubist. Share-based compensation payments to settle non-vested equity awards attributable to postcombination service were recognized as transaction expense in 2015. In addition, the Company assumed all of the outstanding convertible debt of Cubist, which had a fair value of approximately $1.9 billion at the acquisition date. Merck redeemed this debt in February 2015. The transaction was accounted for as an acquisition of a business.
The estimated fair value of assets acquired and liabilities assumed from Cubist is as follows:
Estimated fair value at January 21, 2015 
Cash and cash equivalents$733
Accounts receivable123
Inventories216
Other current assets55
Property, plant and equipment151
Identifiable intangible assets: 
Products and product rights (11 year weighted-average useful life)6,923
IPR&D50
Other noncurrent assets184
Current liabilities (1)
(233)
Deferred income tax liabilities(2,519)
Long-term debt(1,900)
Other noncurrent liabilities (1)
(122)
Total identifiable net assets3,661
Goodwill (2)
4,670
Consideration transferred$8,331
(1)
Included in current liabilities and other noncurrent liabilities is contingent consideration of $73 million and $50 million, respectively.
(2)
The goodwill recognized is largely attributable to anticipated synergies expected to arise after the acquisition and was allocated to the Pharmaceutical segment. The goodwill is not deductible for tax purposes.

The estimated fair values of identifiable intangible assets related to currently marketed products were determined using an income approach through which fair value is estimated based on market participant expectations of each asset’s discounted projected net cash flows. The Company’s estimates of projected net cash flows considered historical and projected pricing, margins and expense levels; the performance of competing products where applicable; relevant industry and therapeutic area growth drivers and factors; current and expected trends in technology and product life cycles; the extent and timing of potential new product introductions by the Company’s competitors; and the life of

each asset’s underlying patent. The net cash flows were then probability-adjusted where appropriate to consider the uncertainties associated with the underlying assumptions, as well as the risk profile of the net cash flows utilized in the valuation. The probability-adjusted future net cash flows of each product were then discounted to present value utilizing a discount rate of 8%. Actual cash flows are likely to be different than those assumed.
The Company recorded the fair value of incomplete research project surotomycin (MK-4261) which, at the time of acquisition had not reached technological feasibility and had no alternative future use. During the second quarter of 2015, the Company received unfavorable efficacy data from a clinical trial for surotomycin.as noted above. The evaluation of this data, combined with an assessment of the commercial opportunity for surotomycin, resulted in the discontinuation of the program and an IPR&D impairment chargecontingent consideration liability was then remeasured at current fair value at each subsequent reporting period until payment was made (see Note 7)6).
In connection with the Cubist acquisition, liabilities were recorded for potential future consideration that is contingent upon the achievement of future sales-based milestones. The fair value of contingent consideration liabilities was determined at the acquisition date using unobservable inputs. These inputs include the estimated amount and timing of projected cash flows, the probability of success (achievement of the contingent event) and a risk-adjusted discount rate of 8% used to present value the probability-weighted cash flows. Changes in the inputs could result in a different fair value measurement.
This transaction closed on January 21, 2015; accordingly, the results of operations of the acquired business have been included in the Company’s results of operations beginning after that date. During 2015, the Company incurred $324 million of transaction costs directly related to the acquisition of Cubist including share-based compensation costs, severance costs, and legal and advisory fees which are reflected in Marketing and administrative expenses.
The following unaudited supplemental pro forma data presents consolidated information as if the acquisition of Cubist had been completed on January 1, 2014:
Years Ended December 312015 2014
Sales$39,584
 $43,437
Net income attributable to Merck & Co., Inc.4,640
 10,887
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders1.65
 3.76
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders1.63
 3.72
The unaudited supplemental pro forma data reflects the historical information of Merck and Cubist adjusted to include additional amortization expense based on the fair value of assets acquired, additional interest expense that would have been incurred on borrowings used to fund the acquisition, transaction costs associated with the acquisition, and the related tax effects of these adjustments. The pro forma data should not be considered indicative of the results that would have occurred if the acquisition had been consummated on January 1, 2014, nor are they indicative of future results.
2014 Transactions
In December 2014, Merck acquired OncoEthix, a privately held biotechnology company specializing in oncology drug development. Total purchase consideration in the transaction included an upfront cash payment of $110 million and future additional milestone payments of up to $265 million that were contingent upon certain clinical and regulatory milestones being achieved. The transaction was accounted for as an acquisition of a business. Merck recognized an intangible asset for IPR&D of $143 million related to MK-8628 (formerly OTX015), an investigational, novel oral BET (bromodomain) inhibitor, as well as a liability for contingent consideration of $43 million and other net assets of $10 million. During 2016, as a result of unfavorable efficacy data, the Company determined that it would discontinue the development of MK-8628. Accordingly, the Company recorded an IPR&D impairment charge of $143 million related to MK-8628 and reversed the related liability for contingent consideration, which had a fair value of $40 million at the time of program discontinuation. Both the IPR&D impairment charge and the income related to the reduction in the liability for contingent consideration were recorded in Research and development expenses in 2016.
On October 1, 2014, the Company completed the sale of its Merck Consumer Care (MCC) business to Bayer AG (Bayer) for $14.2 billion ($14.0 billion net of cash divested), less customary closing adjustments as well as certain contingent amounts held back that were payable upon the manufacturing site transfer in Canada and regulatory approval

in Korea. Under the terms of the agreement, Bayer acquired Merck’s existing over-the-counter business, including the global trademark and prescription rights for Claritin and Afrin. The Company recognized a pretax gain from the sale of MCC of $11.2 billion recorded in Other (income) expense, net in 2014.
Also on October 1, 2014, the Company entered into a worldwide clinical development collaboration with Bayer AG (Bayer) to market and develop soluble guanylate cyclase (sGC) modulators including Bayer’s Adempas (riociguat), which is approved to treat pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension. The two companies will equally share costs and profits from the collaboration and implement a joint development and commercialization strategy. The collaboration also includes clinical development of Bayer’s vericiguat, which is in Phase 3 trials for worsening heart failure, as well as opt-in rights for other early-stage sGC compounds in development at Bayer. Merck in turn made available its early-stage sGC compounds under similar terms. In return for these broad collaboration rights, Merck made an upfront payment to Bayer of $1.0 billion with the potential for additional milestone payments of up to $1.1 billion upon the achievement of agreed-upon sales goals. Under the agreement, Bayer will lead commercialization of Adempas in the Americas, while Merck will lead commercialization in the rest of the world. For vericiguat and other potential opt-in products, Bayer will lead in the rest of world and Merck will lead in the Americas. For all products and candidates included in the agreement, both companies will share in development costs and profits on sales and will have the right to co-promote in territories where they are not the lead. The Company determined that Merck’s payment to access Bayer’s compounds constituted an acquisition of an asset. Of the $1.0 billion consideration paid by Merck, $915 million of fair value related to Adempas and was capitalized as an intangible asset subject to amortization over its estimated useful life of 12 years, and the remaining $85 million of fair value related to the vericiguat compound in clinical development and was expensed within Research and development expenses. The fair values of Adempas and vericiguat were determined using an income approach. The probability-adjusted future net cash flows were then discounted to present value using a discount rate of 10.0% for Adempas and 10.5% for vericiguat. During the second quarter of 2016, the Company determined it was probable that, in 2017, Adempas sales would exceed the threshold triggering a $350 million milestone payment from Merck to Bayer. Accordingly, in the second quarter of 2016, the Company recorded a $350 million liability and a corresponding intangible asset and also recognized $50 million of cumulative amortization expense within Materials and production costs. The remaining intangible asset at June 30, 2016 of $300 million is being amortized over its then-remaining estimated useful life of 10.5 years as supported by projected future cash flows, subject to impairment testing. The remaining potential future milestone payments of $775 million have not yet been accrued as they are not deemed by the Company to be probable at this time.
In August 2014, Merck completed the acquisition of Idenix Pharmaceuticals, Inc. (Idenix) for approximately $3.9 billion in cash ($3.7 billion net of cash acquired). Idenix was a biopharmaceutical company engaged in the discovery and development of medicines for the treatment of human viral diseases, whose primary focus was on the development of next-generation oral antiviral therapeutics to treat hepatitis C virus (HCV) infection. The transaction was accounted for as an acquisition of a business. Merck recognized an intangible asset for IPR&D of $3.2 billion related to MK-3682 (formerly IDX21437), uprifosbuvir, as well as net deferred tax liabilities of $951 million and other net liabilities of $12 million. Uprifosbuvir is a nucleotide prodrug in clinical development being evaluated for the treatment of HCV infection. The excess of the consideration transferred over the fair value of net assets acquired of $1.5 billion was recorded as goodwill that was allocated to the Pharmaceutical segment and is not deductible for tax purposes. The fair value of the identifiable intangible asset related to IPR&D was determined using an income approach. The asset’s probability-adjusted future net cash flows were then discounted to present value using a discount rate of 11.5%. During 2016, the Company recorded a $2.9 billion IPR&D impairment charge related to uprifosbuvir that resulted from recent changes to the product profile taken together with changes to the Company’s expectations for pricing and the market opportunity (see Note 7).
In May 2014, Merck entered into an agreement to sell certain ophthalmic products to Santen Pharmaceutical Co., Ltd. (Santen) in Japan and markets in Europe and Asia Pacific. The agreement provided for upfront payments from Santen and additional payments based on defined sales milestones. Santen will also purchase supply of ophthalmology products covered by the agreement for a two- to five-year period. The transaction closed in most markets on July 1, 2014 and in the remaining markets on October 1, 2014. The Company received $565 million of upfront payments from Santen, net of certain adjustments, and recognized gains of $480 million on the transactions in 2014 included in Other (income) expense, net.

In March 2014, Merck sold its Sirna Therapeutics, Inc. (Sirna) subsidiary to Alnylam Pharmaceuticals, Inc. (Alnylam) for consideration of $25 million and 2,520,044 shares of Alnylam common stock. Merck is eligible to receive future payments associated with the achievement of certain regulatory and commercial milestones, as well as royalties on future sales. Merck recorded a gain of $204 million in Other (income) expense, net in 2014 related to this transaction. The excess of Merck’s tax basis in its investment in Sirna over the value received resulted in an approximate $300 million tax benefit recorded in 2014.
In January 2014, Merck sold the U.S. marketing rights to Saphris, an antipsychotic indicated for the treatment of schizophrenia and bipolar I disorder in adults to Forest Laboratories, Inc. (Forest). Under the terms of the agreement, Forest made upfront payments of $232 million, which were recorded in Sales in 2014, and will make additional payments to Merck based on defined sales milestones. In addition, as part of this transaction, Merck agreed to supply product to Forest (subsequently acquired by Allergan) until patent expiry.
Remicade/Simponi
In 1998, a subsidiary of Schering-Plough entered into a licensing agreement with Centocor Ortho Biotech Inc. (Centocor), a Johnson & Johnson (J&J) company, to market Remicade, which is prescribed for the treatment of inflammatory diseases. In 2005, Schering-Plough’s subsidiary exercised an option under its contract with Centocor for license rights to develop and commercialize Simponi, a fully human monoclonal antibody. The Company has marketing rights to both products throughout Europe, Russia and Turkey. Remicade lost market exclusivity in major European markets in February 2015 and the Company no longer has market exclusivity in any of its marketing territories. The Company continues to have market exclusivity for Simponi in all of its marketing territories. All profits derived from Merck’s distribution of the two products in these countries are equally divided between Merck and J&J.
4.    RestructuringCollaborative Arrangements
Merck has entered into collaborative arrangements that provide the Company with varying rights to develop, produce and market products together with its collaborative partners. Both parties in these arrangements are active participants and exposed to significant risks and rewards dependent on the commercial success of the activities of the collaboration. Merck’s more significant collaborative arrangements are discussed below.

AstraZeneca
In July 2017, Merck and AstraZeneca entered into a global strategic oncology collaboration to co-develop and co-commercialize AstraZeneca’s Lynparza for multiple cancer types. Lynparza is an oral poly (ADP-ribose) polymerase (PARP) inhibitor currently approved for certain types of ovarian and breast cancer. The companies are jointly developing and commercializing Lynparza, both as monotherapy and in combination trials with other potential medicines. Independently, Merck and AstraZeneca will develop and commercialize Lynparza in combinations with their respective PD-1 and PD-L1 medicines, Keytruda and Imfinzi. The companies will also jointly develop and commercialize AstraZeneca’s selumetinib, an oral, potent, selective inhibitor of MEK, part of the mitogen-activated protein kinase (MAPK) pathway, currently being developed for multiple indications. Under the terms of the agreement, AstraZeneca and Merck will share the development and commercialization costs for Lynparza and selumetinib monotherapy and non-PD-L1/PD-1 combination therapy opportunities.
Gross profits from Lynparza and selumetinib product sales generated through monotherapies or combination therapies are shared equally. Merck will fund all development and commercialization costs of Keytruda in combination with Lynparza or selumetinib. AstraZeneca will fund all development and commercialization costs of Imfinzi in combination with Lynparza or selumetinib. AstraZeneca is currently the principal on Lynparza sales transactions. Merck records its share of Lynparza product sales, net of cost of sales and commercialization costs, as alliance revenue within the Pharmaceutical segment and its share of development costs associated with the collaboration as part of Research

and development expenses. Reimbursements received from AstraZeneca for research and development expenses are recognized as reductions to Research and development costs.
As part of the agreement, Merck made an upfront payment to AstraZeneca of $1.6 billion and will make payments of up to $750 million over a multi-year period for certain license options (of which $250 million was paid in December 2017, $400 million was paid in December 2018 and $100 million is expected be paid in 2019). The Company incurs substantial costs for restructuring program activitiesrecorded an aggregate charge of $2.35 billion in Research and development expenses in 2017 related to the upfront payment and future license option payments. In addition, the agreement provides for additional contingent payments from Merck to AstraZeneca related to the successful achievement of regulatory and sales-based milestones.
In 2018, Merck determined it was probable that annual sales of Lynparza in the future would trigger three sales-based milestone payments from Merck to AstraZeneca aggregating $600 million. Accordingly, in 2018, Merck recorded $600 million of liabilities and a corresponding increase to the intangible asset related to Lynparza, and recognized $58 million of cumulative amortization expense within Cost of sales. During 2018, one of the sales-based milestones was triggered, resulting in a $150 million payment to AstraZeneca. In 2018, Merck made an additional $100 million sales-based milestone payment, which was accrued for in 2017 when the Company deemed to the payment to be probable. The remaining $3.4 billion of potential future sales-based milestone payments have not yet been accrued as they are not deemed by the Company to be probable at this time.
In 2018, Lynparza received approval in the United States for the treatment of certain patients with metastatic breast cancer and for use in the first-line maintenance setting for advanced ovarian cancer, triggering capitalized milestone payments of $140 million in the aggregate from Merck to AstraZeneca. Potential future regulatory milestone payments of $1.76 billion remain under the agreement.
The asset balance related to Lynparza (which includes capitalized sales-based and regulatory milestone payments) was $743 million at December 31, 2018 and is included in Other Assets on the Consolidated Balance Sheet. The amount is being amortized over its estimated useful life through 2028 as supported by projected future cash flows, subject to impairment testing.
Summarized information related to this collaboration is as follows:
Years Ended December 312018 2017
Alliance revenue$187
 $20
    
Cost of sales (1)
93
 4
Selling, general and administrative48
 1
Research and development (2)
152
 2,419
    
December 312018 2017
Receivables from AstraZeneca included in Other current assets
$52
 $12
Payables to AstraZeneca included in Accrued and other current liabilities (3)
405
 543
Payables to AstraZeneca included Other Noncurrent Liabilities (3)
250
 100
(1) Represents amortization of capitalized milestone payments.
(2) Amount for 2017 includes $2.35 billion related to the upfront payment and future license option payments.
(3) Includes accrued milestone and license option payments.
Eisai
In March 2018, Merck and Eisai announced a strategic collaboration for the worldwide co-development and co-commercialization of Lenvima, an orally available tyrosine kinase inhibitor discovered by Eisai. Under the agreement, Merck and Eisai will develop and commercialize Lenvima jointly, both as monotherapy and in combination with Merck’s productivityanti-PD-1 therapy, Keytruda. Eisai records Lenvima product sales globally (Eisai is the principal on Lenvima sales transactions), and Merck and Eisai share gross profits equally. Merck records its share of Lenvima product sales, net of cost reduction initiatives,of sales and commercialization costs, as alliance revenue. Expenses incurred during co-development, including for studies evaluating Lenvima as monotherapy, are shared equally by the two companies and reflected in Research and development expenses.

Under the agreement, Merck made an upfront payment to Eisai of $750 million and will make payments of up to $650 million for certain option rights through 2021 (of which $325 million will be paid in March 2019, $200 million is expected to be paid in 2020 and $125 million is expected to be paid in 2021). The Company recorded an aggregate charge of $1.4 billion in Research and development expenses in 2018 related to the upfront payment and future option payments. In addition, the agreement provides for Eisai to receive up to $385 million associated with the achievement of certain clinical and regulatory milestones and up to $3.97 billion for the achievement of milestones associated with sales of Lenvima.
In 2018, Merck determined it was probable that annual sales of Lenvima in the future would trigger three sales-based milestone payments from Merck to Eisai aggregating $268 million. Accordingly, in 2018, Merck recorded $268 million of liabilities and a corresponding increase to the intangible asset related to Lenvima, and recognized $24 million of cumulative amortization expense within Cost of sales. The remaining $3.71 billion of potential future sales-based milestone payments have not yet been accrued as they are not deemed by the Company to be probable at this time.
In 2018, Lenvima was approved for the treatment of patients with unresectable hepatocellular carcinoma in the United States, the European Union, Japan and China, triggering capitalized milestone payments to Eisai of $250 million in the aggregate. Potential future regulatory milestone payments of $135 million remain under the agreement.
The asset balance related to Lenvima (which includes capitalized sales-based and regulatory milestone payments) was $479 million at December 31, 2018 and is included in Other Assets on the Consolidated Balance Sheet. The amount is being amortized over its estimated useful life through 2026 as supported by projected future cash flows, subject to impairment testing.
Summarized information related to this collaboration is as follows:
Year Ended December 312018
Alliance revenue$149
  
Cost of sales (1)
39
Selling, general and administrative13
Research and development (2)
1,489
  
December 312018
Receivables from Eisai included in Other current assets
$71
Payables to Eisai included in Accrued and other current liabilities (3)
375
Payables to Eisai included in Other Noncurrent Liabilities (3)
543
(1) Represents amortization of capitalized milestone payments.
(2) Includes $1.4 billion related to the upfront payment and future option payments.
(3) Includes accrued milestone and option payments.
Bayer AG
In 2014, the Company entered into a worldwide clinical development collaboration with Bayer AG (Bayer) to market and develop soluble guanylate cyclase (sGC) modulators including Bayer’s Adempas, which is approved to treat pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension. The two companies have implemented a joint development and commercialization strategy. The collaboration also includes clinical development of Bayer’s vericiguat, which is in Phase 3 trials for worsening heart failure, as well as opt-in rights for other early-stage sGC compounds in connection withdevelopment by Bayer. Merck in turn made available its early-stage sGC compounds under similar terms. Under the integrationagreement, Bayer leads commercialization of certainAdempas in the Americas, while Merck leads commercialization in the rest of the world. For vericiguat and other potential opt-in products, Bayer will lead commercialization in the rest of world and Merck will lead in the Americas. For all products and candidates included in the agreement, both companies will share in development costs and profits on sales and will have the right to co-promote in territories where they are not the lead. In 2016, Merck began promoting and distributing Adempas in Europe. Transition from Bayer in other Merck territories, including Japan, continued in 2017. Revenue from Adempas includes sales in Merck’s marketing territories, as well as Merck’s share of profits from the sale of Adempas in Bayer’s marketing territories.

In 2018, Merck determined it was probable that annual worldwide sales of Adempas in the future would trigger a $375 million sales-based milestone payment from Merck to Bayer. Accordingly, Merck recorded a $375 million noncurrent liability and a corresponding increase to the intangible asset related to Adempas, and recognized $106 million of cumulative amortization expense within Cost of sales. In 2018, the Company made a $350 million milestone payment to Bayer, which was accrued for in 2016 when Merck deemed the payment to be probable. There is an additional $400 million potential future sales-based milestone payment that has not yet been accrued as it is not deemed by the Company to be probable at this time.
The intangible asset balance related to Adempas (which includes the remaining acquired businesses. intangible asset balance, as well as capitalized sales-based milestone payments) was $1.0 billion at December 31, 2018 and is included in Other Intangibles, Net on the Consolidated Balance Sheet. The amount is being amortized over its estimated useful life through 2027 as supported by projected future cash flows, subject to impairment testing.
Summarized information related to this collaboration is as follows:
Years Ended December 312018 2017 2016
Net product sales recorded by Merck$190
 $149
 $88
Merck’s profit share from sales in Bayer’s marketing territories139
 151
 81
Total sales329
 300
 169
      
Cost of sales (1)
216
 99
 133
Selling, general and administrative35
 27
 26
Research and development127
 101
 82
      
December 31  2018 2017
Receivables from Bayer included in Other current assets
  $32
 $33
Payables to Bayer included in Accrued and other current liabilities (2)
  
 350
Payables to Bayer included in Other Noncurrent Liabilities (2)
  375
 
(1) Includes amortization of intangible assets.
(2) Includes accrued milestone payments.
Aggregate amortization expense related to capitalized license costs recorded within Cost of sales was $186 million in 2018, $39 million in 2017 and $30 million in 2016. The estimated aggregate amortization expense for each of the next five years is as follows: 2019, $196 million; 2020, $193 million; 2021, $191 million; 2022, $187 million; 2023, $181 million.
5.    Restructuring
In 2010 and 2013, the Company commenced actions under global restructuring programs designed to streamline its cost structure. The actions under these programs include the elimination of positions in sales, administrative and headquarters organizations, as well as the sale or closure of certain manufacturing and research and development sites and the consolidation of office facilities. The Company also continues to reduce its global real estate footprint and improve the efficiency of its manufacturing and supply network. The non-facility related restructuring actions under these programs are substantially complete; the remaining activities primarily relate to ongoing facility rationalizations.
The Company recorded total pretax costs of $658 million in 2018, $927 million in 2017 and $1.1 billion in 2016 $1.1 billion in 2015 and $2.0 billion in 2014 related to restructuring program activities. Since inception of the programs through December 31, 2016,2018, Merck has recorded total pretax accumulated costs of approximately $12.6$14.1 billion and eliminated approximately 40,90045,510 positions comprised of employee separations, as well as the elimination of contractors and vacant positions. The Company expects to substantially complete the remaining actions under these programs by the end of 2017 and incur approximately $700 million of additional pretax costs. The Company estimates that approximately two-thirds of the cumulative pretax costs will result inare cash outlays, primarily related to employee separation expense. Approximately one-third of the cumulative pretax costs are non-cash, relating primarily to the accelerated depreciation of facilities to be closed or divested. The Company has substantially completed the actions under these programs.
For segment reporting, restructuring charges are unallocated expenses.

The following table summarizes the charges related to restructuring program activities by type of cost:
 
Separation
Costs
 
Accelerated
Depreciation
 Other Total
Year Ended December 31, 2016       
Materials and production$
 $77
 $104
 $181
Marketing and administrative
 8
 87
 95
Research and development
 142
 
 142
Restructuring costs216
 
 435
 651
 $216
 $227
 $626
 $1,069
Year Ended December 31, 2015       
Materials and production$
 $78
 $283
 $361
Marketing and administrative
 59
 19
 78
Research and development
 37
 15
 52
Restructuring costs208
 
 411
 619
 $208

$174

$728

$1,110
Year Ended December 31, 2014       
Materials and production$
 $429
 $53
 $482
Marketing and administrative
 198
 2
 200
Research and development
 273
 10
 283
Restructuring costs674
 
 339
 1,013
 $674

$900

$404

$1,978
 
Separation
Costs
 
Accelerated
Depreciation
 Other Total
Year Ended December 31, 2018       
Cost of sales$
 $10
 $11
 $21
Selling, general and administrative
 2
 1
 3
Research and development
 (13) 15
 2
Restructuring costs473
 
 159
 632
 $473
 $(1) $186
 $658
Year Ended December 31, 2017       
Cost of sales$
 $52
 $86
 $138
Selling, general and administrative
 2
 
 2
Research and development
 6
 5
 11
Restructuring costs552
 
 224
 776
 $552

$60

$315

$927
Year Ended December 31, 2016       
Cost of sales$
 $77
 $104
 $181
Selling, general and administrative
 8
 87
 95
Research and development
 142
 
 142
Restructuring costs216
 
 435
 651
 $216

$227

$626

$1,069
Separation costs are associated with actual headcount reductions, as well as those headcount reductions which were probable and could be reasonably estimated. Positions eliminated under restructuring program activities were approximately 2,160 in 2018, 2,450 in 2017 and 2,625 in 2016, 3,770 in 2015 and 6,085 in 2014. These position eliminations were comprised of actual headcount reductions and the elimination of contractors and vacant positions.2016.
Accelerated depreciation costs primarily relate to manufacturing, research and administrative facilities and equipment to be sold or closed as part of the programs. Accelerated depreciation costs represent the difference between the depreciation expense to be recognized over the revised useful life of the asset, based upon the anticipated date the site will be closed or divested or the equipment disposed of, and depreciation expense as determined utilizing the useful life prior to the restructuring actions. All of the sites have and will continue to operate up through the respective closure dates and, since future undiscounted cash flows were sufficient to recover the respective book values, Merck recordedis recording accelerated depreciation over the revised useful life of the site assets. Anticipated site closure dates, particularly related to manufacturing locations, have been and may continue to be adjusted to reflect changes resulting from regulatory or other factors.
Other activity in 2016, 20152018, 2017 and 20142016 includes $409141 million, $550267 million and $240409 million, respectively, of asset abandonment, shut-down and other related costs. Additionally, other activity includes certain employee-related costs associated with pension and other postretirement benefit plans (see Note 13)14) and share-based compensation. Other activity also reflects net pretax losses resulting from sales of facilities and related assets of $151 million in 2016, 2016.$117 million in 2015 and $133 million in 2014.

The following table summarizes the charges and spending relating to restructuring program activities:
Separation
Costs
 
Accelerated
Depreciation
 Other Total
Separation
Costs
 
Accelerated
Depreciation
 Other Total
Restructuring reserves January 1, 2015$1,031
 $
 $20
 $1,051
Restructuring reserves January 1, 2017$395
 $
 $146
 $541
Expenses208
 174
 728
 1,110
552
 60
 315
 927
(Payments) receipts, net(647) 
 (435) (1,082)(328) 
 (394) (722)
Non-cash activity
 (174) (260) (434)
 (60) 61
 1
Restructuring reserves December 31, 2015592
 
 53
 645
Restructuring reserves December 31, 2017619
 
 128
 747
Expenses216
 227
 626
 1,069
473
 (1) 186
 658
(Payments) receipts, net(413) 
 (347) (760)(649) 
 (238) (887)
Non-cash activity
 (227) (186) (413)
 1
 15
 16
Restructuring reserves December 31, 2016 (1)
$395
 $
 $146
 $541
Restructuring reserves December 31, 2018 (1)
$443
 $
 $91
 $534
(1) 
The remaining cash outlays are expected to be substantially completed by the end of 2017.2020.

5.6.    Financial Instruments
Derivative Instruments and Hedging Activities
The Company manages the impact of foreign exchange rate movements and interest rate movements on its earnings, cash flows and fair values of assets and liabilities through operational means and through the use of various financial instruments, including derivative instruments.
A significant portion of the Company’s revenues and earnings in foreign affiliates is exposed to changes in foreign exchange rates. The objectives and accounting related to the Company’s foreign currency risk management program, as well as its interest rate risk management activities are discussed below.

Foreign Currency Risk Management
The Company has established revenue hedging, balance sheet risk management and net investment hedging programs to protect against volatility of future foreign currency cash flows and changes in fair value caused by volatility in foreign exchange rates.
The objective of the revenue hedging program is to reduce the variability caused by changes in foreign exchange rates that would affect the U.S. dollar value of future cash flows derived from foreign currency denominated sales, primarily the euro and Japanese yen. To achieve this objective, the Company will hedge a portion of its forecasted foreign currency denominated third-party and intercompany distributor entity sales (forecasted sales) that are expected to occur over its planning cycle, typically no more than two years years into the future. The Company will layer in hedges over time, increasing the portion of forecasted sales hedged as it gets closer to the expected date of the forecasted foreign currency denominated sales. The portion of forecasted sales hedged is based on assessments of cost-benefit profiles that consider natural offsetting exposures, revenue and exchange rate volatilities and correlations, and the cost of hedging instruments. The Company manages its anticipated transaction exposure principally with purchased local currency put options, forward contracts, and purchased collar options.
The fair values of these derivative contracts are recorded as either assets (gain positions) or liabilities (loss positions) in the Consolidated Balance Sheet. Changes in the fair value of derivative contracts are recorded each period in either current earnings or OCI, depending on whether the derivative is designated as part of a hedge transaction and, if so, the type of hedge transaction. For derivatives that are designated as cash flow hedges, the effective portion of the unrealized gains or losses on these contracts is recorded in AOCI and reclassified into Sales when the hedged anticipated revenue is recognized. The hedge relationship is highly effective and hedge ineffectiveness has been de minimis. For those derivatives which are not designated as cash flow hedges, but serve as economic hedges of forecasted sales, unrealized gains or losses are recorded in Sales each period. The cash flows from both designated and non-designated contracts are reported as operating activities in the Consolidated Statement of Cash Flows. The Company does not enter into derivatives for trading or speculative purposes.

The Company manages operating activities and net asset positions at theeach local levelsubsidiary in order to mitigate the effecteffects of exchange on monetary assets and liabilities. The Company also uses a balance sheet risk management program to mitigate the exposure of net monetary assets that are denominated in a currency other than a subsidiary’s functional currency from the effects of volatility in foreign exchange. In these instances, Merck principally utilizes forward exchange contracts to offset the effects of exchange on exposures denominated in developed country currencies, primarily the euro and Japanese yen. For exposures in developing country currencies, the Company will enter into forward contracts to partially offset the effects of exchange on exposures when it is deemed economical to do so based on a cost-benefit analysis that considers the magnitude of the exposure, the volatility of the exchange rate and the cost of the hedging instrument. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.
Monetary assets and liabilities denominated in a currency other than the functional currency of a given subsidiary are remeasured at spot rates in effect on the balance sheet date with the effects of changes in spot rates reported in Other (income) expense, net. The forward contracts are not designated as hedges and are marked to market through Other (income) expense, net. Accordingly, fair value changes in the forward contracts help mitigate the changes in the value of the remeasured assets and liabilities attributable to changes in foreign currency exchange rates, except to the extent of the spot-forward differences. These differences are not significant due to the short-term nature of the contracts, which typically have average maturities at inception of less than one year.

The Company may also useuses forward exchange contracts to hedge its net investment in foreign operations against movements in exchange rates. The forward contracts are designated as hedges of the net investment in a foreign operation. The Company hedges a portion of the net investment in certain of its foreign operations and measures ineffectiveness based upon changes in spot foreign exchange rates that are recorded in Other (income) expense, net.operations. The effective portion of the unrealized gains or losses on these contracts isare recorded in foreign currency translation adjustment within OCI, and remainsremain in AOCI until either the sale or complete or substantially complete liquidation of the subsidiary. The Company excludes certain portions of the change in fair value of its derivative instruments from the assessment of hedge effectiveness (excluded component). Changes in fair value of the excluded components are recognized in OCI. In accordance with the new guidance adopted on January 1, 2018 (see Note 2), the Company has elected to recognize in earnings the initial value of the excluded component on a straight-line basis over the life of the derivative instrument, rather than using the mark-to-market approach. The cash flows from these contracts are reported as investing activities in the Consolidated Statement of Cash Flows.
Foreign exchange risk is also managed through the use of foreign currency debt. The Company’s senior unsecured euro-denominated notes have been designated as, and are effective as, economic hedges of the net investment in a foreign operation. Accordingly, foreign currency transaction gains or losses due to spot rate fluctuations on the euro-denominated debt instruments are included in foreign currency translation adjustment within OCI. Included in
The effects of the cumulative translation adjustmentCompany’s net investment hedges on OCI and the Consolidated Statement of Income are pretax gainsshown below:
 
Amount of Pretax (Gain) Loss Recognized in Other Comprehensive Income (1)
 
Amount of Pretax (Gain) Loss Recognized in Other (income) expense, net for Amounts Excluded from Effectiveness Testing
Years Ended December 312018 2017 2016 2018 2017 2016
Net Investment Hedging Relationships           
Foreign exchange contracts$(18) $
 $2
 $(11) $
 $(1)
Euro-denominated notes(183) 520
 (193) 
 
 
(1) No amounts were reclassified from AOCI into income related to the sale of $193 million in 2016, $304 million in 2015 and $294 million in 2014 from the euro-denominated notes.a subsidiary.

Interest Rate Risk Management
The Company may use interest rate swap contracts on certain investing and borrowing transactions to manage its net exposure to interest rate changes and to reduce its overall cost of borrowing. The Company does not use leveraged swaps and, in general, does not leverage any of its investment activities that would put principal capital at risk.
In May 2016,2018, four interest rate swaps with notional amounts of $250 million eachaggregating $1.0 billion matured. These swaps effectively converted the Company’s $1.0 billion, 0.70%1.30% fixed-rate notes due 20162018 to variable rate debt. In December 2018, in connection with the early repayment of debt, the Company settled three interest rate swaps with notional amounts aggregating $550 million. These swaps effectively converted a portion of the Company’s $1.25 billion, 5.00% notes due 2019 to variable rate debt. At December 31, 2016,2018, the Company was a party to 2619 pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges of fixed-rate notes in which the notional amounts match the amount of the hedged fixed-rate notes as detailed in the table below.
20162018
Debt InstrumentPar Value of Debt Number of Interest Rate Swaps Held Total Swap Notional AmountPar Value of Debt Number of Interest Rate Swaps Held Total Swap Notional Amount
1.30% notes due 20181,000
 4
 1,000
5.00% notes due 20191,250
 3
 550
1.85% notes due 20201,250
 5
 1,250
$1,250
 5
 $1,250
3.875% notes due 20211,150
 5
 1,150
1,150
 5
 1,150
2.40% notes due 20221,000
 4
 1,000
1,000
 4
 1,000
2.35% notes due 20221,250
 5
 1,250
1,250
 5
 1,250
The interest rate swap contracts are designated hedges of the fair value changes in the notes attributable to changes in the benchmark London Interbank Offered Rate (LIBOR) swap rate. The fair value changes in the notes attributable to changes in the LIBOR swap rate are recorded in interest expense and offset byalong with the offsetting fair value changes in the swap contracts. The cash flows from these contracts are reported as operating activities in the Consolidated Statement of Cash Flows.

The table below presents the location of amounts recorded on the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges as of December 31:
 Carrying Amount of Hedged Liabilities Cumulative Amount of Fair Value Hedging Adjustment Increase (Decrease) Included in the Carrying Amount
 2018 2017 2018 2017
Balance Sheet Line Item in which Hedged Item is Included       
Loans payable and current portion of long-term debt$
 $983
 $
 $(17)
Long-Term Debt (1)
4,560
 5,146
 (82) (41)
(1) Amounts include hedging adjustment gains related to discontinued hedging relationships of $11 million at December 31, 2017.
Presented in the table below is the fair value of derivatives on a gross basis segregated between those derivatives that are designated as hedging instruments and those that are not designated as hedging instruments as of December 31:
  2016 2015  2018 2017
  
Fair Value of
Derivative
 
U.S. Dollar
Notional
 
Fair Value of
Derivative
 
U.S. Dollar
Notional
  
Fair Value of
Derivative
 
U.S. Dollar
Notional
 
Fair Value of
Derivative
 
U.S. Dollar
Notional
Balance Sheet Caption Asset Liability Asset Liability Balance Sheet Caption Asset Liability Asset Liability 
Derivatives Designated as Hedging Instruments                          
Interest rate swap contractsOther assets $20
 $
 $2,700
 $42
 $
 $2,700
Other assets $
 $
 $
 $2
 $
 $550
Interest rate swap contractsAccrued and other current liabilities 
 
 
 
 1
 1,000
Accrued and other current liabilities 
 
 
 
 3
 1,000
Interest rate swap contractsOther noncurrent liabilities 
 29
 3,500
 
 23
 3,500
Other noncurrent liabilities 
 81
 4,650
 
 52
 4,650
Foreign exchange contractsOther current assets 616
 
 6,063
 579
 
 4,171
Other current assets 263
 
 6,222
 51
 
 4,216
Foreign exchange contractsOther assets 129
 
 2,075
 386
 
 4,136
Other assets 75
 
 2,655
 38
 
 1,936
Foreign exchange contractsAccrued and other current liabilities 
 1
 48
 
 1
 77
Accrued and other current liabilities 
 7
 774
 
 71
 2,014
Foreign exchange contractsOther noncurrent liabilities 
 1
 12
 
 
 
Other noncurrent liabilities 
 1
 89
 
 1
 20
  $765

$31

$14,398

$1,007

$25

$15,584
  $338

$89

$14,390

$91

$127

$14,386
Derivatives Not Designated as Hedging Instruments                          
Foreign exchange contractsOther current assets $230
 $
 $8,210
 $212
 $
 $8,783
Other current assets $116
 $
 $5,430
 $39
 $
 $3,778
Foreign exchange contractsOther assets 
 
 
 18
 
 179
Accrued and other current liabilities 
 71
 9,922
 
 90
 7,431
Foreign exchange contractsAccrued and other current liabilities 
 103
 2,931
 
 37
 2,508
Foreign exchange contractsOther noncurrent liabilities 
 
 
 
 1
 6
  $230
 $103
 $11,141
 $230
 $38
 $11,476
  $116
 $71
 $15,352
 $39
 $90
 $11,209
  $995
 $134
 $25,539
 $1,237
 $63
 $27,060
  $454
 $160
 $29,742
 $130
 $217
 $25,595
As noted above, the Company records its derivatives on a gross basis in the Consolidated Balance Sheet. The Company has master netting agreements with several of its financial institution counterparties (see Concentrations of Credit Risk below). The following table provides information on the Company’s derivative positions subject to these master netting arrangements as if they were presented on a net basis, allowing for the right of offset by counterparty and cash collateral exchanged per the master agreements and related credit support annexes at December 31:
2016 20152018 2017
Asset Liability Asset LiabilityAsset Liability Asset Liability
Gross amounts recognized in the consolidated balance sheet$995
 $134
 $1,237
 $63
$454
 $160
 $130
 $217
Gross amount subject to offset in master netting arrangements not offset in the consolidated balance sheet(131) (131) (59) (59)(121) (121) (94) (94)
Cash collateral (received) posted(529) 
 (862) 
Cash collateral received(107) 
 (3) 
Net amounts$335
 $3
 $316
 $4
$226
 $39
 $33
 $123

The table below provides information onregarding the location and amount of pretax gain or loss amounts for(gains) losses of derivatives that are: (i) designated in a fair value hedging relationship, (ii) designated in a foreign currencyor cash flow hedging relationship, (iii) designated in a foreign currency net investment hedging relationship and (iv) not designated in a hedging relationship:
relationships:
Years Ended December 312016 2015 2014
Derivatives designated in a fair value hedging relationship     
Interest rate swap contracts     
Amount of loss (gain) recognized in Other (income) expense, net on derivatives (1)
$28
 $(14) $(17)
Amount of (gain) loss recognized in Other (income) expense, net on hedged item (1)
(29) 7
 14
Derivatives designated in foreign currency cash flow hedging relationships     
Foreign exchange contracts     
Amount of gain reclassified from AOCI to Sales
(311) (724) (143)
Amount of gain recognized in OCI on derivatives
(210) (526) (775)
 Derivatives designated in foreign currency net investment hedging relationships     
Foreign exchange contracts     
Amount of gain recognized in Other (income) expense, net on derivatives (2)
(1) (4) (6)
Amount of loss (gain) recognized in OCI on derivatives
2
 (10) (192)
Derivatives not designated in a hedging relationship     
Foreign exchange contracts     
Amount of loss (gain) recognized in Other (income) expense, net on derivatives (3)
132
 (461) (516)
Amount of (gain) loss recognized in Sales 

 (1) 15
 Sales 
Other (income) expense, net (1)
 Other comprehensive income (loss)
Years Ended December 312018 2017 2016 2018 2017 2016 2018 2017 2016
Financial Statement Line Items in which Effects of Fair Value or Cash Flow Hedges are Recorded$42,294
 $40,122
 $39,807
 $(402) (500) 189
 $(361) $316
 $(1,078)
(Gain) loss on fair value hedging relationships                 
Interest rate swap contracts                 
Hedged items
 
 
 (27) (48) (29) 
 
 
Derivatives designated as hedging instruments
 
 
 50
 12
 (35) 
 
 
Impact of cash flow hedging relationships                 
Foreign exchange contracts                 
Amount of gain (loss) recognized in OCI on derivatives

 
 
 
 
 
 228
 (562) 210
(Decrease) increase in Sales as a result of AOCI reclassifications
(160) 138
 311
 
 
 
 160
 (138) (311)
(1)
(1) Interest expense is a component of Other (income) expense, net.
The table below provides information regarding the income statement effects of derivatives not designated as hedging instruments:
    Amount of Derivative Pretax (Gain) Loss Recognized in Income
Years Ended December 31 Income Statement Caption 2018 2017 2016
Derivatives Not Designated as Hedging Instruments        
Foreign exchange contracts (1)
 Other (income) expense, net $(260) $110
 $132
Foreign exchange contracts (2)
 Sales (8) (3) 
(1) These derivative contracts mitigate changes in the value of remeasured foreign currency denominated monetary assets and liabilities attributable to changes in foreign currency exchange rates.
(2) These derivative contracts serve as economic hedges of forecasted transactions.
There was $1 million, $7 million and $3 million of ineffectiveness on the hedge during 2016, 2015 and 2014, respectively.
(2)
There was no ineffectiveness on the hedge. Represents the amount excluded from hedge effectiveness testing.
(3)
These derivative contracts mitigate changes in the value of remeasured foreign currency denominated monetary assets and liabilities attributable to changes in foreign currency exchange rates.
At December 31, 2016,2018, the Company estimates $462186 million of pretax net unrealized gains on derivatives maturing within the next 12 months that hedge foreign currency denominated sales over that same period will be reclassified from AOCI to Sales. The amount ultimately reclassified to Sales may differ as foreign exchange rates change. Realized gains and losses are ultimately determined by actual exchange rates at maturity.

Investments in Debt and Equity Securities
Information on investments in debt and equity securities at December 31 is as follows:
 
2016 20152018 2017
Fair
Value
 
Amortized
Cost
 Gross Unrealized 
Fair
Value
 
Amortized
Cost
 Gross Unrealized
Fair
Value
 
Amortized
Cost
 Gross Unrealized 
Fair
Value
 
Amortized
Cost
 Gross Unrealized
Gains Losses Gains LossesGains Losses Gains Losses
Corporate notes and bonds$10,577
 $10,601
 $15
 $(39) $10,259
 $10,299
 $7
 $(47)$4,920
 $4,985
 $3
 $(68) $9,806
 $9,837
 $9
 $(40)
Asset-backed securities1,275
 1,285
 1
 (11) 1,542
 1,548
 1
 (7)
U.S. government and agency securities892
 895
 2
 (5) 2,042
 2,059
 
 (17)
Foreign government bonds166
 167
 
 (1) 733
 739
 
 (6)
Mortgage-backed securities8
 8
 
 
 626
 634
 1
 (9)
Commercial paper4,330
 4,330
 
 
 2,977
 2,977
 
 

 
 
 
 159
 159
 
 
U.S. government and agency securities2,232
 2,244
 1
 (13) 1,761
 1,767
 
 (6)
Asset-backed securities1,376
 1,380
 1
 (5) 1,284
 1,290
 
 (6)
Mortgage-backed securities796
 801
 1
 (6) 694
 697
 1
 (4)
Foreign government bonds519
 521
 
 (2) 607
 586
 22
 (1)
Equity securities349
 281
 71
 (3) 534
 409
 125
 
$20,179
 $20,158
 $89
 $(68) $18,116
 $18,025
 $155
 $(64)
Total debt securities7,261

7,340

6

(85)
14,908

14,976

11

(79)
Publicly traded equity securities (1)
456
       275
 265
 16
 (6)
Total debt and publicly traded equity securities$7,717










$15,183

$15,241

$27

$(85)
(1) Pursuant to the adoption of ASU 2016-01 (see Note 2), beginning on January 1, 2018, changes in the fair value of publicly traded equity securities are recognized in net income. Unrealized net losses of $35 million were recognized in Other (income) expense, net during 2018 on equity securities still held at December 31, 2018.
At December 31, 2018, the Company also had $568 million of equity investments without readily determinable fair values included in Other Assets. During 2018, the Company recognized unrealized gains of $167 million in Other (income) expense, net on certain of these equity investments based on favorable observable price changes from transactions involving similar investments of the same investee. In addition, during 2018, the Company recognized unrealized losses of $26 million in Other (income) expense, net related to certain of these investments based on unfavorable observable price changes.
Available-for-sale debt securities included in Short-term investments totaled $7.8 billion894 million at December 31, 2016.2018. Of the remaining debt securities, $10.25.8 billion mature within five years. At December 31, 20162018 and 2015,2017, there were no debt securities pledged as collateral.
Fair Value Measurements
Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company uses a fair value hierarchy which maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. There are three levels of inputs used to measure fair value with Level 1 having the highest priority and Level 3 having the lowest:
Level 1 — Quoted prices (unadjusted) in active markets for identical assets or liabilities.
Level 2 — Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3 — Unobservable inputs that are supported by little or no market activity. Level 3 assets or liabilities are those whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques with significant unobservable inputs, as well as assets or liabilities for which the determination of fair value requires significant judgment or estimation.
If the inputs used to measure the financial assets and liabilities fall within more than one level described above, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.


Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis
Financial assets and liabilities measured at fair value on a recurring basis at December 31 are summarized below:
Fair Value Measurements Using Fair Value Measurements UsingFair Value Measurements Using Fair Value Measurements Using
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
2016 20152018 2017
Assets                              
Investments                              
Corporate notes and bonds$
 $10,389
 $
 $10,389
 $
 $10,259
 $
 $10,259
$
 $4,835
 $
 $4,835
 $
 $9,678
 $
 $9,678
Asset-backed securities (1)

 1,253
 
 1,253
 
 1,476
 
 1,476
U.S. government and agency securities
 731
 
 731
 68
 1,767
 
 1,835
Foreign government bonds
 166
 
 166
 
 732
 
 732
Mortgage-backed securities
 
 
 
 
 547
 
 547
Commercial paper
 4,330
 
 4,330
 
 2,977
 
 2,977

 
 
 
 
 159
 
 159
U.S. government and agency securities29
 1,890
 
 1,919
 
 1,761
 
 1,761
Asset-backed securities (1)

 1,257
 
 1,257
 
 1,284
 
 1,284
Mortgage-backed securities (1)

 628
 
 628
 
 694
 
 694
Foreign government bonds
 518
 
 518
 
 607
 
 607
Equity securities201
 
 
 201
 360
 
 
 360
Publicly traded equity securities147
 
 
 147
 104
 
 
 104
230
 19,012
 
 19,242
 360
 17,582
 
 17,942
147
 6,985
 
 7,132
 172
 14,359
 
 14,531
Other assets (2)
                              
U.S. government and agency securities
 313
 
 313
 
 
 
 
55
 106
 
 161
 
 207
 
 207
Corporate notes and bonds
 188
 
 188
 
 
 
 

 85
 
 85
 
 128
 
 128
Mortgage-backed securities (1)

 168
 
 168
 
 
 
 
Asset-backed securities (1)

 119
 
 119
 
 
 
 

 22
 
 22
 
 66
 
 66
Mortgage-backed securities
 8
 
 8
 
 79
 
 79
Foreign government bonds
 1
 
 1
 
 
 
 

 
 
 
 
 1
 
 1
Equity securities148
 
 
 148
 155
 19
 
 174
Publicly traded equity securities309
 
 
 309
 171
 
 
 171
148

789



937

155

19



174
364

221



585

171

481



652
Derivative assets (3)
                              
Forward exchange contracts
 241
 
 241
 
 48
 
 48
Purchased currency options
 644
 
 644
 
 1,041
 
 1,041

 213
 
 213
 
 80
 
 80
Forward exchange contracts
 331
 
 331
 
 154
 
 154
Interest rate swaps
 20
 
 20
 
 42
 
 42

 
 
 
 
 2
 
 2

 995
 
 995
 
 1,237
 
 1,237


454



454



130



130
Total assets$378

$20,796

$

$21,174

$515

$18,838

$

$19,353
$511

$7,660

$

$8,171

$343

$14,970

$

$15,313
Liabilities                              
Other liabilities                              
Contingent consideration$
 $
 $891
 $891
 $
 $
 $590
 $590
$
 $
 $788
 $788
 $
 $
 $935
 $935
Derivative liabilities (2)(3)
                              
Interest rate swaps
 81
 
 81
 
 55
 
 55
Forward exchange contracts
 93
 
 93
 
 38
 
 38

 74
 
 74
 
 162
 
 162
Interest rate swaps
 29
 
 29
 
 24
 
 24
Written currency options
 12
 
 12
 
 1
 
 1

 5
 
 5
 
 
 
 

 134
 
 134
 
 63
 
 63


160



160



217



217
Total liabilities$
 $134
 $891
 $1,025
 $
 $63
 $590
 $653
$

$160

$788

$948

$

$217

$935

$1,152
(1) 
Primarily all of the asset-backed securities are highly-rated (Standard & Poor’s rating of AAA and Moody’s Investors Service rating of Aaa), secured primarily by auto loan, credit card and student loan receivables, with weighted-average lives of primarily 5 years or less. Mortgage-backed securities represent AAA-rated securities issued or unconditionally guaranteed as to payment of principal and interest by U.S. government agencies.
(2) 
The increase in investmentsInvestments included in Otherother assets reflects certain assets previously are restricted as to use, primarily for retireethe payment of benefits that became available to fund certain other health and welfare benefits during 2016 (see Note 13).
under employee benefit plans.
(3) 
The fair value determination of derivatives includes the impact of the credit risk of counterparties to the derivatives and the Company’s own credit risk, the effects of which were not significant.
There were no transfers between Level 1 and Level 2 during 2016.2018. As of December 31, 2016,2018, Cash and cash equivalents of $6.58.0 billion includedinclude $5.47.2 billion of cash equivalents (considered(which would be considered Level 2 in the fair value hierarchy).

Contingent Consideration
Summarized information about the changes in liabilities for contingent consideration is as follows:
2016 20152018 2017
Fair value January 1$590
 $428
$935
 $891
Changes in fair value (1)
(407) (16)
Changes in estimated fair value (1)
89
 141
Additions733
 228
8
 3
Payments(25) (50)(244) (100)
Fair value December 31(2)$891
 $590
$788
 $935
(1) Recorded in Research and development expenses, Cost of salesand Materials and productionOther (income) expense, net costs..Includes cumulative translation adjustments.
(2) Balance at December 31, 2018 includes $89 million recorded as a current liability for amounts expected to be paid within the next 12 months.
The changes in the estimated fair value of liabilities for contingent consideration in 20162018 were largely attributable to increases in the reversal of liabilities related to programs obtainedrecorded in connection with the acquisitions of cCAM, OncoEthix and SmartCells (see Note 7). The additions to contingent consideration in 2016 relate to the termination of the SPMSD joint venture in 2016 (see Note 9), partially offset by the reversal of a liability related to the discontinuation of a program obtained in connection with the acquisition of SmartCells (see Note 8). The changes in the estimated fair value of liabilities for contingent consideration in 2017 primarily relate to increases in the liabilities recorded in connection with the termination of the SPMSD joint venture and the acquisitionsclinical progression of IOmet anda program related to the Afferent acquisition. The payments of contingent consideration in 2018 include $175 million related to the achievement of a clinical milestone in connection with the acquisition of Afferent (see Note 3). The additions to contingent considerationremaining payments in 20152018 relate to liabilities recorded in connection with the acquisitionstermination of Cubist and cCAM (see Note 3).the SPMSD joint venture. The payments of contingent consideration in 20162017 relate to the first commercial saleachievement of Zerbaxaa clinical milestone in connection with the European Union and in 2015 relate to the first commercial saleacquisition of Zerbaxa in the United States.IOmet (see Note 3).

Other Fair Value Measurements
Some of the Company’s financial instruments, such as cash and cash equivalents, receivables and payables, are reflected in the balance sheet at carrying value, which approximates fair value due to their short-term nature.
The estimated fair value of loans payable and long-term debt (including current portion) at December 31, 2016,2018, was $25.725.6 billion compared with a carrying value of $24.8$25.1 billion and at December 31, 2015,2017, was $27.025.6 billion compared with a carrying value of $26.4$24.4 billion. Fair value was estimated using recent observable market prices and would be considered Level 2 in the fair value hierarchy.

Concentrations of Credit Risk
On an ongoing basis, the Company monitors concentrations of credit risk associated with corporate and government issuers of securities and financial institutions with which it conducts business. Credit exposure limits are established to limit a concentration with any single issuer or institution. Cash and investments are placed in instruments that meet high credit quality standards, as specified in the Company’s investment policy guidelines.
The majority of the Company’s accounts receivable arise from product sales in the United States and Europe and are primarily due from drug wholesalers and retailers, hospitals, government agencies, managed health care providers and pharmacy benefit managers. The Company monitors the financial performance and creditworthiness of its customers so that it can properly assess and respond to changes in their credit profile. The Company also continues to monitor global economic conditions, including the volatility associated with international sovereign economies, and associated impacts on the financial markets and its business, taking into consideration global economic conditions and the ongoing sovereign debt issues in certain European countries. As of December 31, 2016, the Company’s total net accounts receivable outstanding for more than one year were approximately $140 million. The Company does not expect to have write-offs or adjustments to accounts receivable which would have a material adverse effect on its financial position, liquidity or results of operations.business. 
The Company’s customers with the largest accounts receivable balances are: McKesson Corporation, AmerisourceBergen Corporation and Cardinal Health, Inc., Zuellig Pharma Ltd. (Asia Pacific), and AAH Pharmaceuticals Ltd (UK) which represented, in aggregate, approximately 40% of total accounts receivable at December 31, 2016.2018. The Company monitors the creditworthiness of its customers to which it grants credit terms in the normal course of business. Bad debts have been minimal. The Company does not normally require collateral or other security to support credit sales.
Derivative financial instruments are executed under International Swaps and Derivatives Association master agreements. The master agreements with several of the Company’s financial institution counterparties also include credit support annexes. These annexes contain provisions that require collateral to be exchanged depending on the value of the derivative assets and liabilities, the Company’s credit rating, and the credit rating of the counterparty. As

of December 31, 2016 and 2015,Cash collateral received by the Company had received cash collateral offrom various counterparties was $529107 million and $8623 million, respectively, from various counterparties at December 31, 2018

and the2017, respectively. The obligation to return such collateral is recorded in Accrued and other current liabilities. The Company had not advanced anyNo cash collateral was advanced by the Company to counterparties as of December 31, 20162018 or 2015.2017.
6.7.    Inventories
Inventories at December 31 consisted of:
2016 20152018 2017
Finished goods$1,304
 $1,343
$1,658
 $1,334
Raw materials and work in process4,222
 4,374
5,004
 4,703
Supplies155
 168
194
 201
Total (approximates current cost)5,681
 5,885
6,856
 6,238
Increase to LIFO costs302
 384
1
 45
$5,983
 $6,269
$6,857
 $6,283
Recognized as:      
Inventories$4,866
 $4,700
$5,440
 $5,096
Other assets1,117
 1,569
1,417
 1,187
Inventories valued under the LIFO method comprised approximately $2.32.5 billion and $2.42.2 billion of inventories at December 31, 20162018 and 20152017, respectively. Amounts recognized as Other assets are comprised almost entirely of raw materials and work in process inventories. At December 31, 20162018 and 20152017, these amounts included $1.01.4 billion and $1.51.1 billion, respectively, of inventories not expected to be sold within one year. In addition, these amounts included $807 million and $63$80 million at December 31, 20162018 and 20152017, respectively, of inventories produced in preparation for product launches.
7.8.    Goodwill and Other Intangibles
The following table summarizes goodwill activity by segment:
 
Pharmaceutical
 All Other
 Total
Pharmaceutical Animal Health All Other Total
Balance January 1, 2015$11,108
 $1,884
 $12,992
Acquisitions4,684
 29
 4,713
Divestitures(18) 
 (18)
Impairments
 (47) (47)
Other (1)
88
 (5) 83
Balance December 31, 2015 (2)
15,862
 1,861
 17,723
Balance January 1, 2017$16,075
 $1,708
 $379
 $18,162
Acquisitions207
 275
 482

 177
 
 177
Impairments
 (47) (47)
 
 (38) (38)
Other (1)
6
 (2) 4
(9) (8) 
 (17)
Balance December 31, 2016 (2)
$16,075
 $2,087
 $18,162
Balance December 31, 2017 (2)
16,066
 1,877
 341
 18,284
Acquisitions
 17
 24
 41
Impairments
 
 (144) (144)
Other (1)
96
 (24) 
 72
Balance December 31, 2018 (2)
$16,162
 $1,870
 $221
 $18,253
(1) Other includes cumulative translation adjustments on goodwill balances and certain other adjustments.
(2) Accumulated goodwill impairment losses at December 31, 20162018 and 20152017 were $187$369 million and $140$225 million, respectively.
In 2016, theThe additions to goodwill within the Animal Health segment in the Pharmaceutical segment resulted2017 primarily from the acquisitions of Afferent and IOmet (see Note 3), as well as from the termination of the SPMSD joint venture, which was treated as a step-acquisition for accounting purposes (see Note 8). The addition to goodwill within other non-reportable segments in 2016 relatesrelate to the acquisition of StayWell, which is part of the Healthcare Services segment (see Note 3). In 2015, the additions to goodwill in the Pharmaceutical segment resulted primarily from the acquisition of Cubist and the reductions resulted from the divestiture of the Company’s remaining ophthalmics business in international marketsVallée (see Note 3). The impairments of goodwill within other non-reportable segments in 20162018 and 20152017 relate to certain businesses within the Healthcare Services segment.

Other intangibles at December 31 consisted of:
2016 20152018 2017
Gross
Carrying
Amount
 
Accumulated
Amortization
 Net 
Gross
Carrying
Amount
 
Accumulated
Amortization
 Net
Gross
Carrying
Amount
 
Accumulated
Amortization
 Net 
Gross
Carrying
Amount
 
Accumulated
Amortization
 Net
Products and product rights$46,269
 $31,919
 $14,350
 $45,949
 $28,514
 $17,435
$46,615
 $37,585
 $9,030
 $46,693
 $34,950
 $11,743
IPR&D1,653
 
 1,653
 4,226
 
 4,226
1,064
 
 1,064
 1,194
 
 1,194
Tradenames215
 89
 126
 198
 79
 119
209
 107
 102
 209
 97
 112
Other1,947
 771
 1,176
 1,418
 596
 822
2,403
 1,168
 1,235
 2,035
 901
 1,134
$50,084
 $32,779
 $17,305
 $51,791
 $29,189
 $22,602
$50,291
 $38,860
 $11,431
 $50,131
 $35,948
 $14,183
Acquired intangibles include products and product rights, tradenames and patents, which are initially recorded at fair value, assigned an estimated useful life, and are amortized primarily on a straight-line basis over their estimated useful lives. The increase in intangible assets for products and product rights in 2016 primarily relates to the recognition of intangible assets in connection with the termination of the SPMSD joint venture (see Note 8). Some of the Company’s more significant acquired intangibles related to marketed products (included in productproducts and product rights above) at December 31, 20162018 include Zerbaxa, $3.3$2.7 billion; Zetia, $1.5 billion; Sivextro, $955$833 million;Vytorin, $938 million; Implanon/Nexplanon $587$470 million; Dificid, $561$395 million; Gardasil/Gardasil 9, $468$384 million; NuvaRingBridion, $319 million; $275 million; and NasonexSimponi, $308$194 million. The Company recognizedhas an intangible asset related to Adempas as a result of the formation of a collaboration with Bayer in 2014 (see Note 3)4) that had a carrying value of $872 million$1.0 billion at December 31, 20162018 reflected in “Other” in the table above.
During 2016, 20152017 and 2014,2016, the Company recorded impairment charges related to marketed products and other intangibles of $347 million, $45$58 million and $1.1 billion,$347 million, respectively, within MaterialCost of sales. During 2017, the Company recorded an intangible asset impairment charge of $47 million related to Intron A, a treatment for certain types of cancers. Sales of Intron A are being adversely affected by the availability of new therapeutic options. In 2017, sales of Intron A in the United States eroded more rapidly than previously anticipated by the Company, which led to changes in the cash flow assumptions for Intron A. These revisions to cash flows indicated that the Intron A intangible asset value was not fully recoverable on an undiscounted cash flows basis. The Company utilized market participant assumptions to determine its best estimate of the fair value of the intangible asset related to Intron A that, when compared with its related carrying value, resulted in the impairment charge noted above. The remaining charges in 2017 relate to the impairment of customer relationship, tradename and production costs.developed technology intangibles for certain businesses in the Healthcare Services segment. In 2016, the Company lowered its cash flow projections for Zontivity, a product for the reduction of thrombotic cardiovascular events in patients with a history of myocardial infarction or with peripheral arterial disease, following several business decisions that reduced sales expectations for Zontivity in the United States and Europe. The Company utilized market participant assumptions and considered several different scenarios to determine the fair value of the intangible asset related to Zontivity that, when compared with its related carrying value, resulted in an impairment charge of $252 million. Also during 2016, the Company wrote-off $95 million that had been capitalized in connection with in-licensed products Grastek and Ragwitek,, allergy immunotherapy tablets that, for business reasons, the Company has determined it will returnreturned to the licensor. The charges in 2015 primarily relate to the impairment of customer relationship and tradename intangibles for certain businesses within in the Healthcare Services segment. Of the amount recorded in 2014, $793 million related to PegIntron,$244 million related to Victrelis and $35 million related to Rebetol, all of which are products for the treatment of chronic HCV infection. During 2014, developments in the competitive HCV treatment market led to market share losses that were greater than the Company had predicted causing changes in cash flow projections for PegIntron, Victrelis and Rebetol that indicated the intangible asset values were not recoverable on an undiscounted cash flows basis. The Company utilized market participant assumptions to determine its best estimate of the fair values of the intangible assets related to PegIntron, Victrelis and Rebetol that, when compared with their related carrying values, resulted in the impairment charges noted above.
IPR&D that the Company acquires through business combinations represents the fair value assigned to incomplete research projects which, at the time of acquisition, have not reached technological feasibility. Amounts capitalized as IPR&D are accounted for as indefinite-lived intangible assets, subject to impairment testing until completion or abandonment of the projects. Upon successful completion of each project, the Company will make a separate determination as to the then useful life of the asset and begin amortization. During 2016, 2015 and 2014, $8 million, $280 million and $654 million, respectively, of IPR&D was reclassified to products and product rights upon receipt of marketing approval in a major market.
During 2016,In 2018, the Company recorded $3.6 billion$152 million of IPR&D impairment charges within Research and development expenses. Of this amount, $139 million relates to the write-off of the remaining intangible asset balance for a program obtained in connection with the SmartCells acquisition following a decision to terminate the program due to product development issues. The Company previously recorded an impairment charge in 2016 for the other programs obtained in connection with the acquisition of SmartCells as described below. The discontinuation of this clinical development program resulted in a reversal of the related liability for contingent consideration of $60 million (see Note 6).
In 2017, the Company recorded $483 million of IPR&D impairment charges. Of this amount, $240 million resulted from a strategic decision to discontinue the development of the investigational combination regimens

MK-3682B (grazoprevir/ruzasvir/uprifosbuvir) and MK-3682C (ruzasvir/uprifosbuvir) for the treatment of chronic hepatitis C virus (HCV) infection. This decision was made based on a review of available Phase 2 efficacy data and in consideration of the evolving marketplace and the growing number of treatment options available for patients with chronic HCV infection, including Zepatier, which is marketed by the Company for the treatment of adult patients with chronic HCV infection. As a result of this decision, the Company recorded an IPR&D impairment charge to write-off the remaining intangible asset related to uprifosbuvir. The Company had previously recorded an impairment charge for uprifosbuvir in 2016 as described below. The IPR&D impairment charges in 2017 also include a charge of $226 million to write-off the intangible asset related to verubecestat, an investigational small molecule inhibitor of the beta-site amyloid precursor protein cleaving enzyme 1 (BACE1), resulting from a decision in February 2018 to stop a Phase 3 study evaluating verubecestat in people with prodromal Alzheimer’s disease. The decision to stop the study followed a recommendation by the external Data Monitoring Committee (eDMC), which assessed overall benefit/risk during an interim safety analysis. The eDMC concluded that it was unlikely that positive benefit/risk could be established if the trial continued.
During 2016, the Company recorded $3.6 billion of IPR&D impairment charges. Of this amount, $2.9 billion relatesrelated to the clinical development program for uprifosbuvir, a nucleotide prodrug in clinical developmentthat was being evaluated for the treatment of HCV. The Company determined that recent changes to the product profile, as well as changes to Merck’s expectations for pricing and the market opportunity, taken together constituted a triggering event that required the Company to evaluate the uprifosbuvir intangible asset for impairment. Utilizing market participant assumptions, and considering different scenarios, the Company concluded

that its best estimate of the current fair value of the intangible asset related to uprifosbuvir was $240 million, resulting in the recognition of the pretax impairment charge noted above. The IPR&D impairment charges in 2016 also includeincluded charges of $180 million and $143 million related to the discontinuation of programs obtained in connection with the acquisitions of cCAM Biotherapeutics Ltd. and OncoEthix, respectively, resulting from unfavorable efficacy data. An additional $72 million relatesrelated to programs obtained in connection with the SmartCells acquisition following a decision to terminate the lead compound due to a lack of efficacy and to pursue a back-up compound which reduced projected future cash flows. The IPR&D impairment charges in 2016 also includeincluded $112 million related to an in-licensed program for house dust mite allergies that, for business reasons, will bewas returned to the licensor. The remaining IPR&D impairment charges forin 2016 primarily relaterelated to deprioritized pipeline programs that were deemed to have no alternative use during the period, including a $79 million impairment charge for an investigational candidate for contraception. The discontinuation or delay of certain of these clinical development programs resulted in a reduction of the related liabilities for contingent consideration (see Note 3).consideration.
During 2015, the Company recorded $63 million of IPR&D impairment charges, of which $50 million related to the surotomycin clinical development program. During 2015, the Company received unfavorable efficacy data from a clinical trial for surotomycin. The evaluation of this data, combined with an assessment of the commercial opportunity for surotomycin, resulted in the discontinuation of the program and the IPR&D impairment charge noted above.
During 2014, the Company recorded $49 million of IPR&D impairment charges primarily as a result of changes in cash flow assumptions for certain compounds obtained in connection with the Company’s joint venture with Supera Farma Laboratorios S.A. (Supera), as well as for the discontinuation of certain Animal Health programs.
All of the IPR&D projects that remain in development are subject to the inherent risks and uncertainties in drug development and it is possible that the Company will not be able to successfully develop and complete the IPR&D programs and profitably commercialize the underlying product candidates.
The Company may recognize additional non-cash impairment charges in the future related to other marketed products or pipeline programs and such charges could be material.
Aggregate amortization expense primarily recorded within Materials and productionCost of sales costs was $3.8$2.9 billion in 2016,2018, $4.83.2 billion in 20152017 and $4.23.8 billion in 2014.2016. The estimated aggregate amortization expense for each of the next five years is as follows: 2017, $3.2 billion; 2018, $2.8 billion; 2019, $1.41.5 billion; 2020, $1.2 billion; 2021, $1.1 billion; 2022, $1.1 billion; 2023, $1.1 billion.
8.9.    Joint Ventures and Other Equity Method Affiliates
Equity income from affiliates reflects the performance of the Company’s joint ventures and other equity method affiliates including SPMSD (until termination on December 31, 2016), certain investment funds, as well as AZLP (until the termination of the Company’s relationship with AZLP on June 30, 2014). Equity income from affiliates was $86 million in 2016, $205 million in 2015 and $257 million in 2014 and is included in Other (income) expense, net (see Note 14).
Investments in affiliates accounted for using the equity method totaled $715 million at December 31, 2016 and $702 million at December 31, 2015. These amounts are reported in Other assets. Amounts due from the above joint ventures included in Other current assets were $1 million at December 31, 2016 and $34 million at December 31, 2015.
Sanofi Pasteur MSD
In 1994, Merck and Pasteur Mérieux Connaught (now Sanofi Pasteur S.A.) established an equally-owned joint venture (SPMSD) to market vaccines in Europe and to collaborate in the development of combination vaccines for distribution in Europe. Joint venture vaccine sales were $1.0 billion for 2016, $923 million for 2015 and $1.1 billion for 2014.2016.

On December 31, 2016, Merck and Sanofi Pasteur (Sanofi) terminated SPMSD and ended their joint vaccines operations in Europe. Under the terms of the termination, Merck acquired Sanofi’s 50% interest in SPMSD in exchange for consideration of $657 million comprised of cash, as well as future royalties of 11.5% on net sales of all Merck products that were previously sold by the joint venture through December 31, 2024, which the Company determined had a fair value of $416 million on the date of

termination. The Company accounted for this transaction as a step acquisition, which required that Merck remeasure its ownership interest (previously accounted for as an equity method investment) to fair value at the acquisition date. Merck in turn sold to Sanofi its intellectual property rights held by SPMSD in exchange for consideration of $596 million comprised of cash and future royalties of 11.5% on net sales of all Sanofi products that were previously sold by the joint venture through December 31, 2024, which the Company determined had a fair value of $302 million on the date of termination. Excluded from this arrangement are potential future sales of Vaxelis (a jointly developed investigational pediatric hexavalent combination vaccine that was approved by the European Commission in February 2016)2016 and by the U.S. Food and Drug Administration in 2018). The European marketing rights for Vaxelis were transferred to a separate equally-owned joint venture between Sanofi and Merck (MCM).Merck.
The net impact of the termination of the SPMSD joint venture is as follows:
Products and product rights (8 year useful life)$936
Products and product rights (8-year useful life)$936
Accounts receivable133
133
Income taxes payable(221)(221)
Deferred income tax liabilities(175)(147)
Other, net34
47
Goodwill (1)
20
Net assets acquired727
748
Consideration payable to Sanofi, net(378)(392)
Derecognition of Merck’s previously held equity investment in SPMSD(183)(183)
Increase in net assets166
173
Merck’s share of restructuring costs related to the termination(77)(77)
Net gain on termination of SPMSD joint venture (2)
$89
Net gain on termination of SPMSD joint venture (1)
$96
(1) The goodwill was allocated to the Pharmaceutical segment and is not deductible for tax purposes.
(2) Recorded in Other (income) expense, net.
The estimated fair values of identifiable intangible assets related to products and product rights were determined using an income approach through which fair value is estimated based on market participant expectations of each asset’s projected net cash flows. The projected net cash flows were then discounted to present value utilizing a discount rate of 11.5%. Actual cash flows are likely to be different than those assumed. Of the amount recorded for products and product rights, $468 million relatesrelated to Gardasil/Gardasil 9.
The fair value of liabilities for contingent consideration related to Merck’s future royalty payments to Sanofi of $416 million (reflected in the consideration payable to Sanofi, net, in the table above) was determined at the acquisition date using unobservable inputs. These inputs include the estimated amount and timing of projected cash flows and a risk-adjusted discount rate of 8% used to present value the cash flows. Changes in the inputs could result in a different fair value measurement.
Based on an existing accounting policy election, Merck hasdid not recordedrecord the $302 million estimated fair value of contingent future royalties to be received from Sanofi on the sale of Sanofi products, but rather will recognizeis recognizing such amounts in future periods as sales occur and the royalties are earned.
The Company incurred $24 million of transaction costs related to the termination of SPMSD included in MarketingSelling, general and administrative expenses in 2016.
Pro forma financial information for this transaction has not been presented as the results are not significant when compared with the Company’s financial results.

AstraZeneca LP
In 1982, Merck entered into an agreement with Astra AB (Astra) to develop and market Astra products under a royalty-bearing license. In 1993, Merck’s total sales of Astra products reached a level that triggered the first step in the establishment of a joint venture business carried on by Astra Merck Inc. (AMI), in which Merck and Astra each owned a 50% share. This joint venture, formed in 1994, developed and marketed most of Astra’s new prescription medicines in the United States. In 1998, Merck and Astra completed a restructuring of the ownership and operations of the joint venture whereby Merck acquired Astra’s interest in AMI, renamed KBI Inc. (KBI), and contributed KBI’s

operating assets to a new U.S. limited partnership, Astra Pharmaceuticals L.P. (the Partnership), in exchange for a 1% limited partner interest. Astra contributed the net assets of its wholly owned subsidiary, Astra USA, Inc., to the Partnership in exchange for a 99% general partner interest. The Partnership, renamed AstraZeneca LP (AZLP) upon Astra’s 1999 merger with Zeneca Group Plc, became the exclusive distributor of the products for which KBI retained rights. In connection with the 1998 restructuring of AMI, Merck assumed $2.4 billion par value preferred stock with a dividend rate of 5% per annum, which was carried by KBI and included in Noncontrolling interests.
Merck earned revenue based on sales of KBI products and such revenue was $463 million in 2014 primarily relating to sales of Nexium, as well as Prilosec. In addition, Merck earned certain Partnership returns from AZLP of $192 million in 2014, which were recorded in equity income from affiliates.AZLP.
On June 30, 2014, AstraZeneca exercised its option to purchase Merck’s interest in KBI for $419 million in cash. Of this amount, $327 million reflected an estimate of the fair value of(and redeem Merck’s remaining interest in Nexium and Prilosec. ThisAZLP). A portion of the exercise price, which isremained subject to a true-up in 2018 based on actual sales of Nexium and Prilosec from closing in 2014 to June 2018, was deferred and recognized as income of $5 million, $182 million and $140 million, during 2016, 2015 and 2014, respectively, in Other (income) expense, net as the contingency was eliminated as sales occurred. Once the deferred income amount was fully amortized,recognized, in the first quarter of 2016, the Company began recognizing income and a corresponding receivable for amounts that willwould be due to Merck from AstraZeneca based on the sales performance of Nexium and Prilosec subject to the true-up in June 2018. The Company recognized $93income of $99 million in 2018, $232 million in 2017, and $98 million in 2016 (including $5 million of such income in 2016 includedremaining deferred income) in Other (income) expense, net.
The remaining exercise price of $91 million primarily represents a multiple of ten times Merck’s average 1% annual profit allocation in the partnership for the three years priorrelated to exercise. Merck recognized the $91 million as a gain in 2014 within Other (income) expense, net. As a result of AstraZeneca’s option exercise, the Company’s remaining interest in AZLP was redeemed. Accordingly,these amounts. In January 2019, the Company also recognized a non-cash gainreceived $424 million from AstraZeneca in settlement of approximately $650 million in 2014 within Other (income) expense, net resulting fromthese amounts, which concludes the retirement oftransactions related to the $2.4 billion of KBI preferred stock, the elimination of the Company’s $1.4 billion investment in AZLP and a $340 million reduction of goodwill. This transaction resulted in a net tax benefit of $517 million in 2014 primarily reflecting the reversal of deferred taxes on the AZLP investment balance.
As a result of AstraZeneca exercising its option, as of July 1, 2014, the Company no longer records equity income from AZLP and supply sales to AZLP have terminated.
Summarized financial information for AZLP is as follows:
Year Ended December 31
2014 (1)
Sales$2,205
Materials and production costs1,044
Other expense, net604
Income before taxes (2)
557
(1) Includes results through the June 30, 2014 termination date.
(2) Merck’s partnership returns from AZLP were generally contractually determined as noted above and were not based on a percentage of income from AZLP, other thanCompany’s relationship with respect to Merck’s 1% limited partnership interest.AZLP.
9.10.    Loans Payable, Long-Term Debt and Other Commitments
Loans payable at December 31, 20162018 included $300 million$5.1 billion of notes due in 2017commercial paper and $267149 million of long-dated notes that are subject to repayment at the option of the holder.holders. Loans payable at December 31, 20152017 included $2.3$3.0 billion of notes due in 2016, $10 million of short-term foreign borrowings2018 and $22573 million of long-dated notes that are subject to repayment at the option of the holders. The weighted-average interest rate of commercial paper borrowings was 0.40%2.09% and 0.07%0.85% for the years ended December 31, 20162018 and 2015,2017, respectively.

Long-term debt at December 31 consisted of:
2016 20152018 2017
2.75% notes due 2025$2,487
 $2,485
$2,490
 $2,488
3.70% notes due 20451,972
 1,971
1,974
 1,973
2.80% notes due 20231,743
 1,742
1,745
 1,744
5.00% notes due 20191,273
 1,283
4.15% notes due 20431,237
 1,237
1.85% notes due 20201,238
 1,239
1,231
 1,232
4.15% notes due 20431,236
 1,236
2.35% notes due 20221,228
 1,233
1,214
 1,220
1.125% euro-denominated notes due 20211,134
 1,185
3.875% notes due 20211,152
 1,158
1,132
 1,140
1.125% euro-denominated notes due 20211,035
 1,091
1.875% euro-denominated notes due 20261,028
 1,084
1,127
 1,178
2.40% notes due 20221,003
 1,011
983
 993
Floating-rate borrowing due 2018999
 998
1.10% notes due 2018999
 998
1.30% notes due 2018985
 985
6.50% notes due 2033806
 809
726
 729
Floating-rate notes due 2020698
 698
699
 699
6.55% notes due 2037594
 596
0.50% euro-denominated notes due 2024516
 
565
 591
1.375% euro-denominated notes due 2036512
 
561
 587
2.50% euro-denominated notes due 2034511
 538
560
 585
3.60% notes due 2042489
 489
490
 489
5.85% notes due 2039415
 415
6.55% notes due 2037414
 415
5.75% notes due 2036369
 369
338
 338
5.95% debentures due 2028355
 354
306
 306
5.85% notes due 2039270
 270
6.40% debentures due 2028325
 325
250
 250
6.30% debentures due 2026152
 152
135
 135
Floating-rate notes due 2017
 300
5.00% notes due 2019
 1,260
Other154
 270
225
 309
$24,274
 $23,829
$19,806
 $21,353
Other (as presented in the table above) includedincludes $147223 million and $223300 million at December 31, 20162018 and 2015,2017, respectively, of borrowings at variable rates that resulted in effective interest rates of 0.89%2.27% and zero1.42% for 20162018 and 2015,2017, respectively. Other also included foreign borrowings of $43 million at December 31, 2015 at varying rates up to 4.75%.
With the exception of the 6.30% debentures due 2026, the notes listed in the table above are redeemable in whole or in part, at Merck’s option at any time, at varying redemption prices.
In November 2016,December 2018, the Company issued €1.0exercised a make-whole provision on its $1.25 billion, principal amount of senior unsecured notes consisting of €500 million principal amount of 0.50%5.00% notes due 20242019 and €500 million principal amount of 1.375% notes due 2036. The Company intends to use the net proceeds of the offering of $1.1 billion for general corporate purposes, including without limitation, the repayment of outstanding commercial paper borrowings and other indebtedness with upcoming maturities.
repaid this debt. In October 2014,November 2017, the Company issued €2.5 billion principal amount of senior unsecured notes. The net proceeds of the offering of $3.1 billion were used in part to repay debt that was validly tendered in connection withlaunched tender offers launched by the Company for certain outstanding notes and debentures. The Company paid $2.5 billion$810 million in aggregate consideration (applicable purchase price together with accrued interest) to redeem $1.8 billion principal

amount of debt. In November 2014, Merck redeemed an additional $2.0 billion$585 million principal amount of senior unsecured notes. The Company recorded a pretax loss of $628 million in 2014debt that was validly tendered in connection with these transactions.the tender offers and recognized a loss on extinguishment of debt of $191 million in 2017.
Effective as of November 3, 2009, the Company executed a full and unconditional guarantee of the then existing debt of its subsidiary Merck Sharp & Dohme Corp. (MSD) and MSD executed a full and unconditional guarantee of the then existing debt of the Company (excluding commercial paper), including for payments of principal and interest. These guarantees do not extend to debt issued subsequent to that date.
Certain of the Company’s borrowings require that Merck comply with financial covenants including a requirement that the Total Debt to Capitalization Ratio (as defined in the applicable agreements) not exceed 60%. Atand, at December 31, 2016,2018, the Company was in compliance with these covenants.
The aggregate maturities of long-term debt for each of the next five years are as follows: 2017, $301 million; 2018, $3.0 billion; 2019, $1.3 billion;no maturities; 2020, $1.9 billion; 2021, $2.3 billion; 2022, $2.2 billion; 2023, $1.7 billion.

In June 2016, theThe Company terminated its existing credit facility and entered intohas a new $6.0 billion, five-year credit facility that matures in June 2021.2023. The facility provides backup liquidity for the Company’s commercial paper borrowing facility and is to be used for general corporate purposes. The Company has not drawn funding from this facility.
Rental expense under operating leases, net of sublease income, was $322 million in 2018, $327 million in 2017 and $292 million in 2016, $303 million in 2015 and $350 million in 2014.2016. The minimum aggregate rental commitments under noncancellable leases are as follows: 2017, $200 million; 2018, $141 million; 2019, $122188 million; 2020, $88198 million; 2021, $63150 million; 2022, $134 million; 2023, $84 million and thereafter, $140243 million. The Company has no significant capital leases.
10.11.    Contingencies and Environmental Liabilities
The Company is involved in various claims and legal proceedings of a nature considered normal to its business, including product liability, intellectual property, and commercial litigation, as well as certain additional matters including governmental and environmental matters. In the opinion of the Company, it is unlikely that the resolution of these matters will be material to the Company’s financial position, results of operations or cash flows.
Given the nature of the litigation discussed below and the complexities involved in these matters, the Company is unable to reasonably estimate a possible loss or range of possible loss for such matters until the Company knows, among other factors, (i) what claims, if any, will survive dispositive motion practice, (ii) the extent of the claims, including the size of any potential class, particularly when damages are not specified or are indeterminate, (iii) how the discovery process will affect the litigation, (iv) the settlement posture of the other parties to the litigation and (v) any other factors that may have a material effect on the litigation.
The Company records accruals for contingencies when it is probable that a liability has been incurred and the amount can be reasonably estimated. These accruals are adjusted periodically as assessments change or additional information becomes available. For product liability claims, a portion of the overall accrual is actuarially determined and considers such factors as past experience, number of claims reported and estimates of claims incurred but not yet reported. Individually significant contingent losses are accrued when probable and reasonably estimable. Legal defense costs expected to be incurred in connection with a loss contingency are accrued when probable and reasonably estimable.
The Company’s decision to obtain insurance coverage is dependent on market conditions, including cost and availability, existing at the time such decisions are made. The Company has evaluated its risks and has determined that the cost of obtaining product liability insurance outweighs the likely benefits of the coverage that is available and, as such, has no insurance for most product liabilities effective August 1, 2004.

VioxxLitigation
Product Liability Lawsuits
As previously disclosed, Merck was a defendant in a number of putative class action lawsuits alleging economic injury as a result of the purchase of Vioxx, all but one of which have been settled. Under the settlement, Merck agreed to pay up to $23 million to resolve all properly documented claims submitted by class members, approved attorneys’ fees and expenses, and approved settlement notice costs and certain other administrative expenses. The claims

review process has been completed with the Company paying approximately $700,000. The amount of attorneys’ fees to be paid is yet to be determined.
Merck is also a defendant in a lawsuit (together with the above-referenced lawsuits, the Vioxx Product Liability Lawsuits) brought by the Attorney General of Utah. The lawsuit is pending in Utah state court. Utah alleges that Merck misrepresented the safety of Vioxx and seeks damages and penalties under the Utah False Claims Act. No trial date has been set. Merck recently reached agreements with the Attorneys General in Alaska and Montana to settle their state consumer protection act cases against the Company for $15.25 million and $16.7 million, respectively. As a result, Alaska’s action was dismissed with prejudice on September 30, 2016, and Montana’s action was dismissed with prejudice on October 6, 2016.

Shareholder Lawsuits
As previously disclosed, in addition to the Vioxx Product Liability Lawsuits, various putative class actions and individual lawsuits were filed against Merck and certain former employees alleging that the defendants violated federal securities laws by making alleged material misstatements and omissions with respect to the cardiovascular safety of Vioxx (Vioxx Securities Lawsuits). The Vioxx Securities Lawsuits were coordinated in a multidistrict litigation in the U.S. District Court for the District of New Jersey before Judge Stanley R. Chesler. As previously disclosed, Merck reached a resolution of the Vioxx securities class action for which a reserve was recorded in 2015 and under which Merck created a settlement fund in 2016 of $830 million (the Settlement Class Fund) and agreed to pay an additional amount for approved attorneys’ fees and expenses up to $232 million (the Fee/Expense Fund). On June 28, 2016, the court approved the settlement and awarded attorneys’ fees and expenses in the amount of $222 million; the remaining amount of the Fee/Expense Fund will be added to the Settlement Class Fund. The Company paid the total settlement amount into escrow in April 2016. After available funds under certain insurance policies, Merck’s net cash payment for the settlement and fees was approximately $680 million. The settlement covers all claims relating to Vioxx by settlement class members who purchased Merck securities between May 21, 1999, and October 29, 2004. The settlement is not an admission of wrongdoing and, as part of the settlement agreement, defendants continue to deny the allegations.
In addition, Merck reached a resolution of the above referenced individual securities lawsuits filed by foreign and domestic institutional investors, which were also consolidated with the Vioxx Securities Lawsuits.

Insurance
As a result of the previously disclosed insurance arbitration, the Company’s insurers paid insurance proceeds of approximately $380 million in connection with the settlement of the class action. The Company also has Directors and Officers insurance coverage applicable to the Vioxx Securities Lawsuits with remaining stated upper limits of approximately $145 million, which the Company has not received. There are disputes with the insurers about the availability of the Company’s Directors and Officers insurance coverage for these claims. The amounts actually recovered under the Directors and Officers policies discussed in this paragraph may be less than the stated upper limits.

International Lawsuits
As previously disclosed, in addition to the lawsuits discussed above, Merck has been named as a defendant in litigation relating to Vioxx in Brazil and Europe (collectively, the Vioxx International Lawsuits). The litigation in these jurisdictions is generally in procedural stages and Merck expects that the litigation may continue for a number of years.

Reserves
The Company has an immaterial reserve with respect to certain Vioxx Product Liability Lawsuits. The Company has established no other liability reserves for, and believes that it has meritorious defenses to, the remaining Vioxx Product Liability Lawsuits and Vioxx International Lawsuits and will defend against them.

Other Product Liability Litigation
Fosamax
As previously disclosed, Merck is a defendant in product liability lawsuits in the United States involving Fosamax (Fosamax Litigation). As of December 31, 2016,2018, approximately 4,2303,900 cases arehave been filed and either are pending or conditionally dismissed (as noted below) against

Merck in either federal or state court. In approximately 20Plaintiffs in the vast majority of these actions, plaintiffs allege, among other things, that they have suffered osteonecrosis of the jaw (ONJ), generally subsequent to invasive dental procedures, such as tooth extraction or dental implants and/or delayed healing, in association with the use of Fosamax. In addition, plaintiffs in approximately 4,210 of these actionscases generally allege that they sustained femur fractures and/or other bone injuries (Femur Fractures) in association with the use of Fosamax.

Cases Alleging ONJ and/or Other Jaw Related Injuries
In August 2006, the Judicial Panel on Multidistrict Litigation (JPML) ordered that certain Fosamax product liability cases pending in federal courts nationwide should be transferred and consolidated into one multidistrict litigation (Fosamax ONJ MDL) for coordinated pre-trial proceedings.
In December 2013, Merck reached an agreement in principle with the Plaintiffs’ Steering Committee (PSC) in the Fosamax ONJ MDL to resolve pending ONJ cases not on appeal in the Fosamax ONJ MDL and in the state courts for an aggregate amount of $27.7 million. Merck and the PSC subsequently formalized the terms of this agreement in a Master Settlement Agreement (ONJ Master Settlement Agreement) that was executed in April 2014 and included over 1,200 plaintiffs. In July 2014, Merck elected to proceed with the ONJ Master Settlement Agreement at a reduced funding level of $27.3 million since the participation level was approximately 95%. Merck has fully funded the ONJ Master Settlement Agreement and the escrow agent under the agreement has been making settlement payments to qualifying plaintiffs. The ONJ Master Settlement Agreement has no effect on the cases alleging Femur Fractures discussed below.
Discovery is currently ongoing in some of the approximately 20 remaining ONJ cases that are pending in various federal and state courts and the Company intends to defend against these lawsuits.

Cases Alleging Femur Fractures
In March 2011, Merck submitted a Motion to Transfer to the JPMLJudicial Panel on Multidistrict Litigation (JPML) seeking to have all federal cases alleging Femur Fractures consolidated into one multidistrict litigation for coordinated pre-trial proceedings. The Motion to Transfer was granted in May 2011, and allAll federal cases involving allegations of Femur Fracture have been or will be transferred to a multidistrict litigation in the District of New Jersey (Femur Fracture MDL). In the only bellwether case tried to date in the Femur Fracture MDL, Glynn v. Merck, the jury returned a verdict in Merck’s favor. In addition, in June 2013, the Femur Fracture MDL court granted Merck’s motion for judgment as a matter of law in the Glynn case and held that the plaintiff’s failure to warn claim was preempted by federal law.
In August 2013, the Femur Fracture MDL court entered an order requiring plaintiffs in the Femur Fracture MDL to show cause why those cases asserting claims for a femur fracture injury that took place prior to September 14, 2010, should not be dismissed based on the court’s preemption decision in the Glynn case. Pursuant to the show cause order, in March 2014, the Femur Fracture MDL court dismissed with prejudice approximately 650 cases on preemption grounds. Plaintiffs in approximately 515 of those cases are appealingappealed that decision to the U.S. Court of Appeals for the Third Circuit (Third Circuit). The Femur Fracture MDL court has since dismissed without prejudice another approximately 540 cases pending plaintiffs’ appeal of the preemption ruling to the Third Circuit. On June 30, 2016,In March 2017, the Third Circuit heard oral argument on plaintiffs’ appeal of the preemption ruling and the parties are awaiting the decision.
In addition, in June 2014,issued a decision reversing the Femur Fracture MDL court granted Merck summary judgment in

court’s preemption ruling and remanding the Gaynorv. Merck case and found that Merck’s updates in January 2011appealed cases back to the Fosamax label regarding atypical femur fractures were adequate as a matter of law and that Merck adequately communicated those changes. The plaintiffs in Gaynor have appealed the court’s decision to the Third Circuit. In August 2014, Merck filed a motion requesting that the court enter a further order requiring all plaintiffs in the Femur Fracture MDL who claimcourt. Merck filed a petition for a writ of certiorari to the U.S. Supreme Court in August 2017, seeking review of the Third Circuit’s decision. In December 2017, the Supreme Court invited the Solicitor General to file a brief in the case expressing the views of the United States, and in May 2018, the Solicitor General submitted a brief stating that the 2011 Fosamax label is inadequateThird Circuit’s decision was wrongly decided and recommended that the proximate cause of their alleged injuries to show cause why their cases should not be dismissed basedSupreme Court grant Merck’s cert petition. The Supreme Court granted Merck’s petition in June 2018, and an oral argument before the Supreme Court was held on January 7, 2019. The final decision on the Femur Fracture MDL court’s preemption decision and its ruling inis now pending before the Gaynor case. In November 2014, the court granted Merck’s motion and entered the requested show cause order.Supreme Court.
AsAccordingly, as of December 31, 2016, seven2018, nine cases were actively pending in the Femur Fracture MDL, excluding the 515and approximately 1,055 cases dismissed with prejudice on preemption grounds that are pending appeal and the 540 caseshave either been dismissed without prejudice that are alsoor administratively closed pending final resolution by the aforementioned appeal.

Supreme Court of the appeal of the Femur Fracture MDL court’s preemption order.
As of December 31, 2016,2018, approximately 2,8602,555 cases alleging Femur Fractures have been filed in New Jersey state court and are pending before Judge Jessica MayerJames Hyland in Middlesex County. The parties selected an initial group of 30 cases to be reviewed through fact discovery. Two additional groups of 50 cases each to be reviewed through fact discovery were selected in November 2013 and March 2014, respectively. A further group of 25 cases to be reviewed through fact discovery was selected by Merck in July 2015, and Merck has continued to select additional cases to be reviewed through fact discovery during 2016.from 2016 to the present.
As of December 31, 2016,2018, approximately 280275 cases alleging Femur Fractures have been filed and are pending in California state court. A petition was filed seeking to coordinate allAll of the Femur Fracture cases filed in California state court have been coordinated before a single judge in Orange County, California. The petition was granted and Judge Thierry Colaw is currently presiding over the coordinated proceedings. In March 2014, the court directed that a group of 10 discovery pool cases be reviewed through fact discovery and subsequently scheduled the Galper v. Merck case, which plaintiffs selected, as the first trial. The Galper trial began in February 2015 and the jury returned a verdict in Merck’s favor in April 2015, and plaintiff has appealed that verdict to the California appellate court. Oral argument on plaintiff’s appealIn April 2017, the California appellate court issued a decision affirming the lower court’s judgment in Galper was held on November 17, 2016 and the parties are awaiting a decision.favor of Merck. The next Femur Fracture trial in California that was scheduled to begin in April 2016 was stayed at plaintiffs’ request and a new trial date has not been set.
Additionally, there are fivefour Femur Fracture cases pending in other state courts.
Discovery is ongoing in the Femur Fracture MDL and in state courts where Femur Fracture cases are pending and the Company intends to defend against these lawsuits.

Januvia/Janumet
As previously disclosed, Merck is a defendant in product liability lawsuits in the United States involving Januvia and/or Janumet. As of December 31, 2016,2018, Merck is aware of approximately 1,1951,290 product user claims have been served on Merckusers alleging generally that use of Januvia and/or Janumet caused the development of pancreatic cancer and other injuries. These complaints were
Most claims have been filed in several different state and federal courts.
Most of the claims were filed in a consolidated multidistrict litigation proceeding inbefore the U.S. District Court for the Southern District of California called “In re Incretin-Based Therapies Products Liability Litigation” (MDL). The MDL includes federal lawsuits alleging pancreatic cancer due to useOutside of the following medicines: Januvia, Janumet, Byetta and Victoza,MDL, the latter two of which are products manufactured by other pharmaceutical companies. The majority of claims nothave been filed in the MDL were filed incoordinated proceedings before the Superior Court of California, County of Los Angeles (California State Court).
In November 2015, the MDL and California State Court-in separate opinions-granted summary judgment to defendants on grounds of federal preemption.
Plaintiffs appealed in both forums. In November 2017, the U.S. Court of Appeals for the Ninth Circuit vacated the judgment and remanded for further discovery, which is ongoing. In November 2018, the California state appellate court reversed and remanded on similar grounds.
As of December 31, 2016,2018, eight product users have claims pending against Merck in state courts other than California, including Illinois. In June 2017, the California State Court.
In November 2015, the MDL and California State Court - in separate opinions - grantedIllinois trial court denied Merck’s motion for summary judgment based on federal preemption. Merck appealed, and the Illinois appellate court affirmed in December 2018. Merck intends to defendants on grounds of preemption. Of the approximately 1,195 served product user claims, these rulings resulted in the dismissal of approximately 1,100 product user claims.
Plaintiffs are appealing the MDL and California State Court preemption rulings.appeal that ruling.
In addition to the claims noted above, the Company has agreed as of December 31, 2016, to toll the statute of limitations for approximately 50 additional claims. The Company intends to continue defending against these lawsuits.


Vioxx
As previously disclosed, Merck is a defendant in a lawsuit brought by the Attorney General of Utah alleging that Merck misrepresented the safety of Vioxx. The lawsuit is pending in Utah state court. Utah seeks damages and penalties under the Utah False Claims Act. A bench trial in this matter is currently scheduled for July 2019.

Propecia/Proscar
As previously disclosed, Merck is a defendant in product liability lawsuits in the United States involving Propecia and/or Proscar. As of December 31, 2016, approximately 1,330 lawsuits have been filed by plaintiffs who allege that they have experienced persistent sexual side effects following cessation of treatment with Propecia and/or Proscar. Approximately 50 of the plaintiffs also allege that Propecia or Proscar has caused or can cause prostate cancer, testicular cancer or male breast cancer. The lawsuits have beenwere filed in various federal courts and in state court in New Jersey. The federal lawsuits have beenwere then consolidated for pretrial purposes in a federal multidistrict litigation before Judge Brian Cogan of the Eastern District of New York. The matters pending in state court in New Jersey have beenwere consolidated before Judge Jessica MayerHyland in Middlesex County. In addition, there is one matterCounty (NJ Coordinated Proceedings).
As previously disclosed, on April 9, 2018, Merck and the Plaintiffs’ Executive Committee in the Propecia MDL and the Plaintiffs’ Liaison Counsel in the NJ Coordinated Proceedings entered into an agreement to resolve the above mentioned Propecia/Proscar lawsuits for an aggregate amount of $4.3 million. The settlement was subject to certain contingencies, including 95% plaintiff participation and a per plaintiff clawback if the participation rate was less than 100%. The contingencies were satisfied and the settlement agreement was finalized. After the settlement, fewer than 25 cases remain pending in state court in California, one matter pending in state court in New York, and one matter pending in state court in Ohio. the United States.
The Company intends to defend against theseany remaining unsettled lawsuits.


Governmental Proceedings
As previously disclosed, the Company has received a civil investigative demand fromlearned that the U.S. Attorney’sProsecution Office for the Southern District of New York that requests information relating toMilan, Italy is investigating interactions between the Company’s contracts with, services fromItalian subsidiary, certain employees of the subsidiary and payments to pharmacy benefit managers with respect to Maxaltcertain Italian health care providers. The Company understands that this is part of a larger investigation involving engagements between various health care companies and Levitra from January 1, 2006 to the present.those health care providers. The Company is cooperating with the investigation.
As previously disclosed, the United Kingdom (UK) Competition and Markets Authority (CMA) issued a Statement of Objections against the Company and MSD Sharp & Dohme Limited (MSD UK) in May 2017. In the Statement of Objections, the CMA alleges that MSD UK abused a dominant position through a discount program for Remicade over the period from March 2015 to February 2016. The Company and MSD UK are contesting the CMA’s allegations.
As previously disclosed, the Company has received aan investigative subpoena from the Office of Inspector General of the U.S. Department of Health and Human Services on behalf of the U.S. Attorney’s Office for the District of Maryland and the Civil Division of the U.S. Department of Justice (DOJ) that requestsCalifornia Insurance Commissioner’s Fraud Bureau (Bureau) seeking information relating to the Company’s marketing of Singulair and Dulera Inhalation Aerosol and certain of its other marketing activities from January 1, 20062007 to the present.present related to the pricing and promotion of Cubicin. The Bureau is investigating whether Cubist Pharmaceuticals, Inc., which the Company acquired in 2015, unlawfully induced the presentation of false claims for Cubicin to private insurers under the California Insurance Code False Claims Act. The Company is cooperating with the investigation.
As previously disclosed, the Company had received a civil investigative demand from the U.S. Attorney’s Office, Eastern District of Pennsylvania that requested information relating to the Company’s contracting and pricing of Dulera Inhalation Aerosol with certain pharmacy benefit managers and Medicare Part D plans. The Company cooperated with the investigation and, in August 2016, the Company learned that the underlying qui tam complaint had been unsealed and voluntarily dismissed with prejudice as to the relator and without prejudice as to the government. The DOJ informed the Company that the matter is inactive and that there is no current investigation.
As previously disclosed, the Company has received letters from the DOJ and the SEC that seek information about activities in a number of countries and reference the Foreign Corrupt Practices Act. The Company has cooperated with the agencies in their requests and believes that this inquiry is part of a broader review of pharmaceutical industry practices in foreign countries. As previously disclosed, the Company has been advised by the DOJ that, based on the information that it has received, it has closed its inquiry into this matter as it relates to the Company. The Company has also recently been advised by the SEC that it has closed its inquiry into this matter as it relates to the Company.
As previously disclosed, the Company’s subsidiaries in China have received and may continue to receive inquiries regarding their operations from various Chinese governmental agencies. Some of these inquiries may be related to matters involving other multinational pharmaceutical companies, as well as Chinese entities doing business with such companies. The Company’s policy is to cooperate with these authorities and to provide responses as appropriate.
FromAs previously disclosed, from time to time, the Company receives inquiries and is the subject of preliminary investigation activities from Competition Authoritiescompetition and other governmental authorities in various markets outside the United States. These authorities may include regulators, administrative authorities, and law enforcement and other similar officials, and these preliminary investigation activities may include site visits, formal or informal requests or demands for documents or materials, inquiries or interviews and similar matters. Certain of these preliminary inquiries or activities may lead to the commencement of formal proceedings. Should those proceedings be determined adversely to the Company, monetary fines and/or remedial undertakings may be required.


Commercial and Other Litigation
K-DUR Zetia Antitrust Litigation
As previously disclosed, in June 1997Merck, MSD, Schering Corporation and January 1998, Schering-Plough Corporation (Schering-Plough) settled patent litigation with Upsher-Smith, Inc. (Upsher-Smith) and ESI Lederle, Inc. (Lederle), respectively, relating to generic versions of Schering-Plough’s long-acting potassium chloride product supplement used by cardiac patients, for which Lederle and Upsher-Smith had filed Abbreviated New Drug Applications (ANDAs). FollowingMSP Singapore Company LLC (collectively, the commencement of an administrative proceeding by the U.S. Federal Trade CommissionMerck Defendants) are defendants in 2001 alleging anti-competitive effects from those settlements (which was resolved in Schering-Plough’s favor), putative class action and non-class action suits wereopt-out lawsuits filed in 2018 on behalf of direct and indirect purchasers of K-DUR against Schering-Plough, Upsher-Smith and Lederle and were consolidated in a multidistrict litigation in the U.S. District Court for the District of New Jersey. These suits claimedZetia alleging violations of federal and state antitrust laws, as well as other state statutory and common law causes of action, and sought unspecified damages. In April 2008,action. The cases have been consolidated for pretrial purposes in a federal multidistrict litigation before Judge Rebecca Beach Smith in the indirect purchasers voluntarily dismissed their case. In February 2016,Eastern District of Virginia. On December 6, 2018, the District Courtcourt denied the Company’s motion for summary judgment relatingMerck Defendants’ motions to all ofdismiss or stay the direct purchasers’ claims concerningpurchaser putative class actions pending bilateral arbitration. On February 6, 2019, the settlement with Upsher-Smithmagistrate judge issued a report and grantedrecommendation recommending that the Company’s motion for summary judgment relatingdistrict judge grant in part and deny in part defendants’ motions to all ofdismiss on non-arbitration issues. On February 20, 2019, defendants and retailer opt-out plaintiffs filed objections to the direct purchasers’ claims concerning the settlement with Lederle. In anticipation of trial,report and recommendation. After responses are filed, the parties will await a decision from the district judge.
Rotavirus Vaccines Antitrust Litigation
As previously disclosed, MSD is a defendant in putative class action lawsuits filed motions to exclude certain expert opinions and other evidence, and defendants filed a motion for summary judgment.

In February 2017, Merck and Upsher-Smith reached a settlement in principle with the class2018 on behalf of direct purchasers of RotaTeq, alleging violations of federal antitrust laws. The cases were consolidated in the Eastern District of Pennsylvania. On January 23, 2019, the court denied MSD’s motions to compel arbitration and to dismiss the opt-outsconsolidated complaint. On February 19, 2019, MSD appealed the court’s order on arbitration to the class. Merck will contribute approximately $80 millionThird Circuit, and on February 22, 2019, the court granted MSD’s motion to vacate existing deadlines in the aggregate towardsdistrict court in light of the overall settlement. Formal settlement agreements with the class and the opt-outs have yet to be executed and the settlement with the class is subject to approval by the District Court.appeal.
Sales Force Litigation
As previously disclosed, in May 2013, Ms. Kelli Smith filed a complaint against the Company in the U.S. District Court for the District of New Jersey on behalf of herself and a putative class of female sales representatives and a putative sub-class of female sales representatives with children, claiming (a) discriminatory policies and practices in selection, promotion and advancement, (b) disparate pay, (c) differential treatment, (d) hostile work environment and (e) retaliation under federal and state discrimination laws. Plaintiffs sought and were granted leave to file an amended complaint. In January 2014, plaintiffs filed an amended complaint adding four additional named plaintiffs. In October 2014, the court denied the Company’s motion to dismiss or strike the class claims as premature. In September 2015, plaintiffs filed additional motions, including a motion for conditional certification under the Equal Pay Act; a motion to amend the pleadings seeking to add ERISA and constructive discharge claims and a Company subsidiary as a named defendant; and a motion for equitable relief. Merck filed papers in opposition to the motions. OnIn April 27, 2016, the court granted plaintiff’s motion for conditional certification but denied plaintiffs’ motions to extend the liability period for their Equal Pay Act claims back to June 2009. As a result, the liability period will date back toIn April 2012, at the earliest. On April 29, 2016, the Magistrate Judge granted plaintiffs’ request to amend the complaint to add the following: (i) a Company subsidiary as a corporate defendant; (ii) an ERISA claim and (iii) an individual constructive discharge claim for one of the named plaintiffs. Approximately 700 individuals have opted-in to this action; the opt-in period has closed. In August 2017, plaintiffs filed their motion for class certification. This motion sought to certify a Title VII pay discrimination class and also sought final collective action certification of plaintiffs’ Equal Pay Act claim.
On October 1, 2018, the parties entered into an agreement to fully resolve the Smith sales force litigation. As part of the settlement and in exchange for a full and general release of all individual and class claims, the Company agreed to pay $8.5 million. The settlement agreement, which contains an “opt-out” clause allowing Merck to pull out of the agreement if 30 or more individuals opt out, will be subject to court approval.
On December 18, 2018, plaintiffs filed a motion with the court seeking preliminary approval of the settlement.
Qui Tam Litigation
As previously disclosed, onin June 21, 2012, the U.S. District Court for the Eastern District of Pennsylvania unsealed a complaint that has been filed against the Company under the federal False Claims Act by two former employees alleging, among other things, that the Company defrauded the U.S. government by falsifying data in connection with a clinical study conducted on the mumps component of the Company’s M-M-R II vaccine. The complaint alleges the fraud took place between 1999 and 2001. The U.S. government had the right to participate in and take over the prosecution of this lawsuit, but notified the court that it declined to exercise that right. The two former employees are pursuing the lawsuit without the involvement of the U.S. government. In addition, as previously disclosed, two putative class action lawsuits on behalf of direct purchasers of the M‑M‑R II vaccine, which charge that the Company misrepresented the efficacy of the M-M-R II vaccine in violation of federal antitrust laws and various state consumer

protection laws, are pending in the Eastern District of Pennsylvania. In September 2014, the court denied Merck’s motion to dismiss the False Claims Act suit and granted in part and denied in part its motion to dismiss the then-pending antitrust suit. As a result, both the False Claims Act suit and the antitrust suits have proceeded into discovery.discovery, which is ongoing. The Company intendscontinues to defend against these lawsuits.
Merck KGaA Litigation
InAs previously disclosed, in January 2016, to protect its long-established brand rights in the United States, the Company filed a lawsuit against Merck KGaA, Darmstadt, Germany (KGaA), historically operating as the EMD Group in the United States, alleging it improperly uses the name “Merck” in the United States. KGaA has filed suit against the Company in France, the United Kingdom (UK),UK, Germany, Switzerland, Mexico, India, Australia, Singapore, Hong Kong, and China alleging, among other things, unfair competition, trademark infringement and/or corporate name infringement. In the UK, Australia, Singapore, Hong Kong, and India, allegingKGaA also alleges breach of the parties’ co-existence agreement, unfair competition and/or trademark infringement.coexistence agreement. In December 2015, the Paris Court of First Instance issued a judgment finding that certain activities by the Company directed towards France did not constitute trademark infringement and unfair competition while other activities were found to infringe.infringe and constitute unfair competition. The Company and KGaA have both appealed the decision, and the appeal is scheduled to bewas heard in May 2017. In June 2017, the French appeals court held that certain of the activities by the Company directed to France constituted unfair competition or trademark infringement and, in December 2017, the Company decided not to pursue any further appeal. In January 2016, the UK High Court issued a judgment finding that the Company had breached the co-existence agreement and infringed KGaA’s trademark rights as a result of certain activities directed towards the UK based on use of the word MERCK on promotional and information activity. As noted in the UK decision, this finding was not based on the Company’s use of the sign MERCK in connection with the sale of products or any material pharmaceutical business transacted in the UK. The Company and KGaA have both appealed this decision, and the appeal is scheduled to bewas heard in June 2017. In November 2017, the UK Court of Appeals affirmed the decision on the co-existence agreement and remitted for re-hearing issues of trademark infringement, the scope of KGaA’s UK trademarks for pharmaceutical products, and the relief to which KGaA would be entitled. The re-hearing was held, and no decision has been handed down. In November 2018, the District Court in Hamburg, Germany dismissed all of KGaA’s claims concerning KGaA’s EU trademark with respect to the territory of the EU. In accordance with the Judgment of the Court of Justice of the EU delivered in October 2017, the District Court in Hamburg further held that it had no jurisdiction over the claim by KGaA insofar as the claim related to the territory of the UK. KGaA has appealed this decision. Further decisions from the District Court in Hamburg, Germany, in connection with claims concerning KGaA’s EU trademark, German trademark and trade name rights as well as unfair competition law with respect to the territory of Germany are expected on February 28, 2019. In January 2019, the Mexican Trademark Office issued a decision on KGaA’s action. The court found no trademark infringement by the Company and dismissed all of KGaA’s claims for trademark infringement. The court ruled against the Company on KGaA’s unfair competition claim. Both KGaA and the Company have appealed this decision.


Patent Litigation
From time to time, generic manufacturers of pharmaceutical products file ANDAsabbreviated NDAs with the U.S. Food and Drug Administration (FDA)FDA seeking to market generic forms of the Company’s products prior to the expiration of relevant patents owned by the Company. To protect its patent rights, the Company may file patent infringement lawsuits against such generic companies. Certain products of the Company (or products marketed via agreements with other companies) currently involved in such patent infringement litigation in the United States include: Cancidas, Invanz, Nasonex, Noxafil, and NuvaRing. Similar lawsuits defending the Company’s patent rights may exist in other countries. The Company intends to vigorously defend its patents, which it believes are valid, against infringement by companies attempting to market products prior to the expiration of such patents. As with any litigation, there can be no assurance of the outcomes, which, if adverse, could result in significantly shortened periods of exclusivity for these products and, with respect to products acquired through acquisitions, potentially significant intangible asset impairment charges.
CancidasInegy — The patents protecting Inegy — In February 2014, a patent infringement lawsuit was filed in the United States against Xellia Pharmaceuticals ApS (Xellia) with respect to Xellia’s applicationEurope have expired but supplemental protection certificates (SPCs) have been granted to the FDA seeking pre-patent expiry approvalCompany in many European countries that will expire in April 2019. There are multiple challenges to market athe SPCs related to Inegy throughout Europe and generic version of Cancidas. In June 2015, the district court found that Xellia infringed the Company’s patent and ordered that Xellia’s application not be approved until the patent expiresproducts have been launched in September 2017 (including pediatric exclusivity). Xellia appealed this decision,Austria, France, Italy, Ireland, Spain, Portugal, Germany, and the appeal was heard in March 2016. In May 2016, the parties reached a settlement whereby Xellia can launch its generic version in August 2017, or earlier under certain conditions. In August 2014, a patent infringement lawsuit was filed in the United States against Fresenius Kabi USA, LLC (Fresenius) in respect of Fresenius’s application to the FDA seeking pre-patent expiry approval to market a generic version of Cancidas. In December 2016, the parties reached a settlement whereby Fresenius can launch its generic version in August 2017, or earlier under certain conditions.
Invanz — In July 2014, a patent infringement lawsuit was filed in the United States against Hospira in respect of Hospira’s application to the FDA seeking pre-patent expiry approval to market a generic version of Invanz. The trial in this matter was held in April 2016 and, in October 2016, the district court ruled that the patent is valid and infringed. In August 2015, a patent infringement lawsuit was filed in the United States against Savior Lifetec Corporation (Savior) in respect of Savior’s application to the FDA seeking pre-patent expiry approval to market a generic version of Invanz. The lawsuit automatically stays FDA approval of Savior’s application until November 2017 or until an adverse court decision, if any, whichever may occur earlier.
Nasonex — In July 2014, a patent infringement lawsuit was filed in the United States against Teva Pharmaceuticals USA, Inc. (Teva Pharma) in respect of Teva Pharma’s application to the FDA seeking pre-patent expiry approval to market a generic version of Nasonex. The trial in this matter was held in June 2016. In November 2016, the district court ruled that the patent was valid but not infringed.Netherlands. The Company has appealed thisfiled for preliminary injunctions in many countries that are still pending decision. Preliminary injunctions are presently in force in Austria, Czech Republic, Greece, Norway, Portugal, and Slovakia. Preliminary injunctions have been denied or revoked in Germany, Ireland, the Netherlands and Spain. The Company is appealing those decisions. In March 2015, a patent infringement lawsuit was filed in the United StatesFrance and Belgium, preliminary injunctions were granted against Amneal Pharmaceuticals LLC (Amneal) in respect of Amneal’s application to the FDA seeking pre-patent expiry approval to market a generic version of Nasonex.some companies and denied against others, and appeals are pending. The trial in this matterSPC was held valid in

merits proceedings in June 2016. In January 2017, the district court ruled that the patent was valid but not infringed.Portugal and France. The Company has appealed this decision.
A previous decision, issued in June 2013, held that the Merck patent in the Teva Pharmafiled and Amneal lawsuits covering mometasone furoate monohydrate was valid, but that it was not infringed by Apotex Corp.’s proposed product. In April 2015, awill continue to file actions for patent infringement lawsuit was filedseeking damages against Apotex Inc. and Apotex Corp. (Apotex) in respect of Apotex’s now-launched productthose companies that the Company believes differs from thelaunch generic version in the previous lawsuit.products before April 2019.
Noxafil — In August 2015, the Company filed a lawsuit against Actavis Laboratories Fl, Inc. (Actavis) in the United States in respect of that company’s application to the FDA seeking pre-patent expiry approval to sell a generic version of Noxafil. The lawsuit automatically stays FDA approvalIn October 2017, the district court held the patent valid and infringed. Actavis appealed this decision. While the appeal was pending, the parties reached a settlement, subject to certain terms of Actavis’s application until December 2017 or until an adverse court decision, if any, whichever may occur earlier. The trial in this matter is currently scheduledthe agreement being met, whereby Actavis can launch its generic version prior to begin in July 2017.expiry of the patent and pediatric exclusivity under certain conditions. In March 2016, the Company filed a lawsuit against Roxane Laboratories, Inc. (Roxane) in the United States in respect of that company’s application to the FDA seeking pre-patent expiry approval to sell a generic version of Noxafil. The lawsuit automatically stays FDA approvalIn November 2017, the parties reached a settlement whereby Roxane can launch its generic version prior to expiry of Roxane’s application until August 2018 or until an adverse court decision, if any, whichever may occur earlier.the patent under certain conditions. In February 2016, the Company filed a lawsuit against Par Sterile Products LLC, Par Pharmaceutical, Inc., Par Pharmaceutical Companies, Inc. and Par Pharmaceutical Holdings, Inc. (collectively, Par) in the United States in respect of that company’s application to the FDA seeking pre-

patentpre-patent expiry approval to sell a generic version of Noxafil.injection. In October 2016, the parties reached a settlement whereby Par can launch its generic version in January 2023, or earlier under certain conditions.
NuvaRing In December 2013,February 2018, the Company filed a lawsuit against a subsidiary of Allergan plcFresenius Kabi USA, LLC (Fresenius) in the United States in respect of that company’s application to the FDA seeking pre-patent expiry approval to sell a generic version of NuvaRingNoxafil. The trial in this matter was held in January 2016. In August 2016,November 2018, the district court ruled thatCompany reached a settlement with Fresenius, whereby Fresenius can launch its generic version of the intravenous product prior to expiry of the patent was invalid and the Company has appealed this decision.under certain conditions. In September 2015,March 2018, the Company filed a lawsuit against Teva PharmaMylan Laboratories Limited in the United States in respect of that company’s application to the FDA seeking pre-patent expiry approval to sell a generic version of NuvaRing. Based on its ruling in the Allergan plc matter, the district court dismissed the Company’s lawsuit in December 2016. The Company has appealed this decision.
The Company had been involved in ongoing litigation in Canada with Apotex concerning the Company’s patents related to lovastatin, alendronate, and norfloxacin. All of the litigation has now been either settled or concluded. As a consequence of the conclusion of all of this litigation, in 2016, the Company recorded a net gain of $117 million included in Other (income) expense, net (see Note 14).

Anti-PD-1 Antibody Patent Oppositions and Litigation
As previously disclosed, Ono Pharmaceutical Co. (Ono) has a European patent (EP 1 537 878) (’878) that broadly claims the use of an anti-PD-1 antibody, such as the Company’s immunotherapy, Keytruda, for the treatment of cancer. Ono has previously licensed its commercial rights to an anti-PD-1 antibody to Bristol-Myers Squibb (BMS) in certain markets. BMS and Ono also own European Patent EP 2 161 336 (’336) that, as granted, broadly claimed anti-PD-1 antibodies that could include KeytrudaNoxafil.
As previously disclosed, the Company and BMS and Ono were engaged in worldwide litigation, includingNasonexNasonex lost market exclusivity in the United States over the validity and infringement of the ‘878 patent, the ‘336 patent and their equivalents.
In January 2017, the Company announcedin 2016. Prior to that, it had entered into a settlement and license agreement with BMS and Ono resolving the worldwide patent infringement litigation related to the use of an anti-PD-1 antibody for the treatment of cancer, such as Keytruda. Under the settlement and license agreement, the Company made a one-time payment of $625 million (which was recorded as an expense in the Company’s 2016 financial results) to BMS and will pay royalties on the worldwide sales of Keytruda for a non-exclusive license to market Keytruda in any market in which it is approved. For global net sales of Keytruda, the Company will pay royalties as follows:
6.5% of net sales occurring from January 1, 2017 through and including December 31, 2023; and
2.5% of net sales occurring from January 1, 2024 through and including December 31, 2026.
The parties also agreed to dismiss all claims worldwide in the relevant legal proceedings.
In OctoberApril 2015, PDL Biopharma (PDL) filed a lawsuit in the United States against the Company alleging that the manufacture of Keytruda infringed US Patent No. 5,693,761 (’761 patent), which expired in December 2014. This patent claims platform technology used in the creation and manufacture of recombinant antibodies and PDL is seeking damages for pre-expiry infringement of the ’761 patent.
In July 2016, the Company filed a patent infringement lawsuit against Apotex Inc. and Apotex Corp. (Apotex) in respect of Apotex’s marketed product that the Company believed was infringing. In January 2018, the Company and Apotex settled this matter with Apotex agreeing to pay the Company $115 million plus certain other consideration.
Januvia, Janumet, Janumet XR — In February 2019, Par Pharmaceutical, Inc. (Par Pharmaceutical) filed suit against the Company in the U.S. District Court for the District of New Jersey, seeking a declaratory judgment actionof invalidity of a patent owned by the Company covering certain salt and polymorphic forms of sitagliptin that expires in 2026. A judgment in its favor may allow Par Pharmaceutical to bring to market a generic version of Janumet XR following the expiration of key patent protection in 2022, but prior to the expiration of the later-granted patent it is challenging. In response, the Company filed a patent infringement lawsuit in the United StatesU.S. District Court for the District of Delaware against GenentechPar Pharmaceutical and Cityadditional companies that also indicated an intent to market generic versions of Hope seeking a ruling that US Patent No. 7,923,221 (the Cabilly III patent)Januvia, which claims platform technology used in the creationJanumet, and manufacture of recombinant antibodies, is invalid and that KeytrudaJanumet XR and bezlotoxumab do not infringefollowing expiration of key patent protection in 2022, but prior to the Cabilly III patent. In July 2016,expiration of the later-granted patent owned by the Company also filedcovering certain salt and polymorphic forms of sitagliptin that expires in 2026, and a petition in the USPTO for Inter Partes Review (IPR) of certain claims of US Patent No. 6,331,415 (the Cabilly II patent), which claims platform technology used in the creation and manufacture of recombinant antibodies and is alsolater granted patent owned by Genentech and City of Hope, as being invalid. In December 2016, the USPTO denied the petition but allowed the Company to join an IPR filed previouslycovering the Janumet formulation which expires in 2028. No schedule for the cases has been set by another party.the court.
Gilead Patent Litigation and Opposition
In August 2013, Gilead Sciences, Inc. (Gilead) filed a lawsuit in the U.S. District Court for the Northern District of California seeking a declaration that two Company patents were invalid and not infringed by the sale of their two sofosbuvir containing products, Solvadi and Harvoni. The Company filed a counterclaim that the sale of these

products did infringe these two patents and sought a reasonable royalty for the past, present and future sales of these products. In March 2016, at the conclusion of a jury trial, the patents were found to be not invalid and infringed. The jury awarded the Company $200 million as a royalty for sales of these products up to December 2015. After the conclusion of the jury trial, the court held a bench trial on the equitable defenses raised by Gilead. In June 2016, the court found for Gilead and determined that Merck could not collect the jury award and that the patents were unenforceable with respect to Gilead. The Company has appealed the court’s decision. Gilead has also asked the court to overturn the jury’s decision on validity. The court held a hearing on Gilead’s motion in August 2016, and the court subsequently rejected Gilead’s request. The Company will pay 20%, net of legal fees, of damages or royalties, if any, that it receives to Ionis Pharmaceuticals, Inc.
The Company, through its Idenix Pharmaceuticals, Inc. subsidiary, has pending litigation against Gilead in the United States, the UK, Norway, Canada, Germany, France, and AustraliaFrance based on different patent estates that would also be infringed by Gilead’s sales of thesetheir two products.products, Sovaldi and Harvoni. Gilead has opposed the European patent at the EPO.European Patent Office (EPO). Trial in the United States was held in December 2016 and the jury returned a verdict for the Company, awarding damages of $2.54 billion. The Company is currently briefingsubmitted post-trial motions, including on the issues of enhanced damages and future royalties. Gilead is briefingsubmitted post-trial motions for judgment as a matter of law. A hearing on the motions was held in September 2017. Also, in September 2017, the court denied the Company’s motion on enhanced damages, granted its motion on prejudgment interest and deferred its motion on future royalties. In February 2018, the UK, Australiacourt granted Gilead’s motion for judgment as a matter of law and Canada, the Company was initially unsuccessful and those cases are currently under appeal. In Norway,found the patent was held invalid for a lack of enablement. The Company appealed this decision. The appellate briefing is completed and no further appeal was filed.the Company is waiting for the oral argument to be scheduled. The EPO opposition division revoked the European patent, and the Company has appealed this decision. The cases in France and Germany have been stayed pending the final decision of the EPO.


Other Litigation
There are various other pending legal proceedings involving the Company, principally product liability and intellectual property lawsuits. While it is not feasible to predict the outcome of such proceedings, in the opinion of the Company, either the likelihood of loss is remote or any reasonably possible loss associated with the resolution of such proceedings is not expected to be material to the Company’s financial position, results of operations or cash flows either individually or in the aggregate.

Legal Defense Reserves
Legal defense costs expected to be incurred in connection with a loss contingency are accrued when probable and reasonably estimable. Some of the significant factors considered in the review of these legal defense reserves are as follows: the actual costs incurred by the Company; the development of the Company’s legal defense strategy and structure in light of the scope of its litigation; the number of cases being brought against the Company; the costs and outcomes of completed trials and the most current information regarding anticipated timing, progression, and related costs of pre-trial activities and trials in the associated litigation. The amount of legal defense reserves as of December 31, 20162018 and December 31, 20152017 of approximately $185245 million and $245160 million, respectively, represents the Company’s best estimate of the minimum amount of defense costs to be incurred in connection with its outstanding litigation; however, events such as additional trials and other events that could arise in the course of its litigation could affect the ultimate amount of legal defense costs to be incurred by the Company. The Company will continue to monitor its legal defense costs and review the adequacy of the associated reserves and may determine to increase the reserves at any time in the future if, based upon the factors set forth, it believes it would be appropriate to do so.

Environmental Matters
As previously disclosed, Merck’s facilities in Oss, the Netherlands, were inspected in 2012 by the Province of Brabant (the Province)(Province) pursuant to the Dutch Hazards of Major Accidents Decree and the sites’ environmental permits. The Province issued penalties for alleged violations of regulations governing preventing and managing accidents with hazardous substances, and the government also issued a fine for alleged environmental violations at one of the Oss facilities, which together totaled $235 thousand. The Company was subsequently advised that a criminal investigation had been initiated based upon certain of the issues that formed the basis of the administrative enforcement action by the Province. The Company intends to defend itself againstAs previously disclosed, the matter was settled, without any enforcement action that may result from this investigation.
In May 2015, the Environmental Protection Agency conductedadmission of liability, for an air compliance evaluationaggregate payment of the Company’s pharmaceutical manufacturing facility in Elkton, Virginia. As a result of the investigation, the Company

was recently issued a Notice of Noncompliance and Show Cause Notification relating to certain federally enforceable requirements applicable to the Elkton facility. The Company is attempting to resolve these alleged violations by way of settlement but will defend itself if settlement cannot be reached.€400 thousand.
The Company and its subsidiaries are parties to a number of proceedings brought under the Comprehensive Environmental Response, Compensation and Liability Act, commonly known as Superfund, and other federal and state equivalents. These proceedings seek to require the operators of hazardous waste disposal facilities, transporters of waste to the sites and generators of hazardous waste disposed of at the sites to clean up the sites or to reimburse the government for cleanup costs. The Company has been made a party to these proceedings as an alleged generator of waste disposed of at the sites. In each case, the government alleges that the defendants are jointly and severally liable for the cleanup costs. Although joint and several liability is alleged, these proceedings are frequently resolved so that the allocation of cleanup costs among the parties more nearly reflects the relative contributions of the parties to the site situation. The Company’s potential liability varies greatly from site to site. For some sites the potential liability is de minimis and for others the final costs of cleanup have not yet been determined. While it is not feasible to predict the outcome of many of these proceedings brought by federal or state agencies or private litigants, in the opinion of the Company, such proceedings should not ultimately result in any liability which would have a material adverse effect on the financial position, results of operations, liquidity or capital resources of the Company. The Company has taken an active role in identifying and accruing for these costs and such amounts do not include any reduction for anticipated recoveries of cleanup costs from former site owners or operators or other recalcitrant potentially responsible parties.
In management’s opinion, the liabilities for all environmental matters that are probable and reasonably estimable have been accrued and totaled $83$71 million and $109$82 million at December 31, 20162018 and 2015,2017, respectively. These liabilities are undiscounted, do not consider potential recoveries from other parties and will be paid out over the periods of remediation for the applicable sites, which are expected to occur primarily over the next 15 years. Although it is not possible to predict with certainty the outcome of these matters, or the ultimate costs of remediation, management does not believe that any reasonably possible expenditures that may be incurred in excess of the liabilities accrued

should exceed $64$60 million in the aggregate. Management also does not believe that these expenditures should result in a material adverse effect on the Company’s financial position, results of operations, liquidity or capital resources for any year.
11.12.    Equity
The Merck certificate of incorporation authorizes 6,500,000,000 shares of common stock and 20,000,000 shares of preferred stock.

Capital Stock
A summary of common stock and treasury stock transactions (shares in millions) is as follows:
2016 2015 20142018 2017 2016
Common
Stock
 
Treasury
Stock
 
Common
Stock
 
Treasury
Stock
 
Common
Stock
 
Treasury
Stock
Common
Stock
 
Treasury
Stock
 
Common
Stock
 
Treasury
Stock
 
Common
Stock
 
Treasury
Stock
Balance January 13,577
 796
 3,577
 739
 3,577
 650
3,577
 880
 3,577
 828
 3,577
 796
Purchases of treasury stock
 60
 
 75
 
 134

 122
 
 67
 
 60
Issuances (1)

 (28) 
 (18) 
 (45)
 (17) 
 (15) 
 (28)
Balance December 313,577
 828
 3,577
 796
 3,577
 739
3,577
 985
 3,577
 880
 3,577
 828
(1)  
Issuances primarily reflect activity under share-based compensation plans.
On October 25, 2018, the Company entered into accelerated share repurchase (ASR) agreements with two third-party financial institutions (Dealers). Under the ASR agreements, Merck agreed to purchase $5 billion of Merck’s common stock, in total, with an initial delivery of 56.7 million shares of Merck’s common stock, based on the then-current market price, made by the Dealers to Merck, and payments of $5 billion made by Merck to the Dealers on October 29, 2018, which were funded with existing cash and investments, as well as short-term borrowings. The payments to the Dealers were recorded as reductions to shareholders’ equity, consisting of a $4 billion increase in treasury stock, which reflects the value of the initial 56.7 million shares received on October 29, 2018, and a $1 billion decrease in other-paid-in capital, which reflects the value of the stock held back by the Dealers pending final settlement. The number of shares of Merck’s common stock that Merck may receive, or may be required to remit, upon final settlement under the ASR agreements will be based upon the average daily volume weighted-average price of Merck’s common stock during the term of the ASR program, less a negotiated discount. Final settlement of the transaction under the ASR agreements is expected to occur in the first half of 2019, but may occur earlier at the option of the Dealers, or later under certain circumstances. If Merck is obligated to make adjustment payments to the Dealers under the ASR agreements, Merck may elect to satisfy such obligations in cash or in shares of Merck’s common stock.
12.13.    Share-Based Compensation Plans
The Company has share-based compensation plans under which the Company grants restricted stock units (RSUs) and performance share units (PSUs) to certain management level employees. The Company also issues RSUs to employees of certain of the Company’s equity method investees. In addition, employees and non-employee directors may be granted options to purchase shares of Company common stock at the fair market value at the time of grant. These plans were approved by the Company’s shareholders.

At December 31, 2016,2018, 125111 million shares collectively were authorized for future grants under the Company’s share-based compensation plans. These awards are settled primarily with treasury shares.
Employee stock options are granted to purchase shares of Company stock at the fair market value at the time of grant. These awards generally vest one-third each year over a three-year period, with a contractual term of 7-10 years. RSUs are stock awards that are granted to employees and entitle the holder to shares of common stock as the awards vest. The fair value of the stock option and RSU awards is determined and fixed on the grant date based on the Company’s stock price. PSUs are stock awards where the ultimate number of shares issued will be contingent on the Company’s performance against a pre-set objective or set of objectives. The fair value of each PSU is determined on the date of grant based on the Company’s stock price. For RSUs and PSUs, dividends declared during the vesting period are payable to the employees only upon vesting. Over the PSU performance period, the number of shares of stock that are expected to be issued will be adjusted based on the probability of achievement of a performance target and final compensation expense will be recognized based on the ultimate number of shares issued. RSU and PSU

distributions will be in shares of Company stock after the end of the vesting or performance period, generally three years, subject to the terms applicable to such awards. PSU awards generally vest after three years. Prior to 2018, RSU awards generally vested after three years; beginning with awards granted in 2018, RSU awards generally vest one-third each year over a three-year period.
Total pretax share-based compensation cost recorded in 2016, 20152018, 2017 and 20142016 was $300348 million, $299312 million and $278300 million, respectively, with related income tax benefits of $9255 million, $9357 million and $8692 million, respectively.
The Company uses the Black-Scholes option pricing model for determining the fair value of option grants. In applying this model, the Company uses both historical data and current market data to estimate the fair value of its options. The Black-Scholes model requires several assumptions including expected dividend yield, risk-free interest rate, volatility, and term of the options. The expected dividend yield is based on historical patterns of dividend payments. The risk-free rate is based on the rate at grant date of zero-coupon U.S. Treasury Notes with a term equal to the expected term of the option. Expected volatility is estimated using a blend of historical and implied volatility. The historical component is based on historical monthly price changes. The implied volatility is obtained from market data on the Company’s traded options. The expected life represents the amount of time that options granted are expected to be outstanding, based on historical and forecasted exercise behavior.
The weighted average exercise price of options granted in 2016, 20152018, 2017 and 20142016 was $54.6358.15, $59.7363.88 and $58.1454.63 per option, respectively. The weighted average fair value of options granted in 2016, 20152018, 2017 and 20142016 was $5.898.26, $6.467.04 and $6.795.89 per option, respectively, and were determined using the following assumptions:
Years Ended December 312016 2015 20142018 2017 2016
Expected dividend yield3.8% 4.1% 4.3%3.4% 3.6% 3.8%
Risk-free interest rate1.4% 1.7% 2.0%2.9% 2.0% 1.4%
Expected volatility19.6% 19.9% 22.0%19.1% 17.8% 19.6%
Expected life (years)6.2
 6.2
 6.4
6.1
 6.1
 6.2
Summarized information relative to stock option plan activity (options in thousands) is as follows:
Number
of Options
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term (Years)
 
Aggregate
Intrinsic
Value
Number
of Options
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term (Years)
 
Aggregate
Intrinsic
Value
Outstanding January 1, 201664,668
 $41.64
  
Outstanding January 1, 201836,274
 $46.77
  
Granted6,220
 54.63
  3,520
 58.15
  
Exercised(23,846) 39.39
  (14,598) 40.51
  
Forfeited(1,951) 45.14
    (1,389) 53.80
    
Outstanding December 31, 201645,091
 $44.47
 4.42 $654
Exercisable December 31, 201634,311
 $40.87
 3.12 $619
Outstanding December 31, 201823,807
 $51.89
 5.95 $584
Exercisable December 31, 201816,184
 $48.85
 4.82 $446
Additional information pertaining to stock option plans is provided in the table below:
Years Ended December 312016 2015 20142018 2017 2016
Total intrinsic value of stock options exercised$444
 $332
 $626
$348
 $236
 $444
Fair value of stock options vested28
 30
 35
29
 30
 28
Cash received from the exercise of stock options939
 485
 1,560
591
 499
 939

A summary of nonvested RSU and PSU activity (shares in thousands) is as follows:
 RSUs PSUs RSUs PSUs
 
Number
of Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number
of Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number
of Shares
 
Weighted
Average
Grant Date
Fair Value
 
Number
of Shares
 
Weighted
Average
Grant Date
Fair Value
Nonvested January 1, 2016 13,400
 $53.73
 1,884
 $55.33
Nonvested January 1, 2018 13,609
 $59.32
 1,868
 $60.03
Granted 5,617
 54.67
 733
 57.38
 7,270
 58.46
 1,081
 57.17
Vested (4,956) 45.06
 (786) 48.18
 (3,766) 59.66
 (758) 57.59
Forfeited (795) 56.65
 (87) 58.82
 (985) 59.30
 (152) 60.06
Nonvested December 31, 2016 13,266
 $57.19
 1,744
 $59.24
Nonvested December 31, 2018 16,128
 $58.85
 2,039
 $59.42
At December 31, 2016,2018, there was $443560 million of total pretax unrecognized compensation expense related to nonvested stock options, RSU and PSU awards which will be recognized over a weighted average period of 1.9 years. For segment reporting, share-based compensation costs are unallocated expenses.
13.14.    Pension and Other Postretirement Benefit Plans
The Company has defined benefit pension plans covering eligible employees in the United States and in certain of its international subsidiaries. In addition, the Company provides medical benefits, principally to its eligible U.S. retirees and their dependents, through its other postretirement benefit plans. The Company uses December 31 as the year-end measurement date for all of its pension plans and other postretirement benefit plans.

Net Periodic Benefit Cost
The net periodic benefit cost (credit) for pension and other postretirement benefit plans consisted of the following components:
Pension Benefits      Pension Benefits      
U.S. International Other Postretirement BenefitsU.S. International Other Postretirement Benefits
Years Ended December 312016 2015 2014 2016 2015 2014 2016 2015 20142018 2017 2016 2018 2017 2016 2018 2017 2016
Service cost$282
 $307
 $300
 $238
 $251
 $266
 $54
 $80
 $78
$326
 $312
 $282
 $238
 $252
 $238
 $57
 $57
 $54
Interest cost456
 434
 425
 204
 206
 269
 82
 110
 115
432
 454
 456
 178
 172
 204
 69
 81
 82
Expected return on plan assets(831) (819) (782) (382) (379) (416) (107) (143) (139)(851) (862) (831) (431) (393) (382) (83) (78) (107)
Net amortization64
 158
 74
 76
 104
 59
 (103) (59) (71)
Amortization of unrecognized prior service cost(50) (53) (55) (13) (11) (11) (84) (98) (106)
Net loss amortization232
 180
 119
 84
 98
 87
 1
 1
 3
Termination benefits23
 22
 53
 4
 1
 11
 4
 7
 22
19
 44
 23
 2
 4
 4
 3
 8
 4
Curtailments5
 (12) (69) (1) (9) (4) (18) (19) (39)10
 3
 5
 1
 (4) (1) (8) (31) (18)
Settlements
 1
 11
 6
 12
 6
 
 
 
5
 
 
 13
 5
 6
 
 
 
Net periodic benefit (credit) cost$(1) $91
 $12
 $145
 $186
 $191
 $(88) $(24) $(34)
Net periodic benefit cost (credit)$123
 $78
 $(1) $72
 $123
 $145
 $(45) $(60) $(88)
The changes in net periodic benefit cost (credit) cost year over year for pension plans are largely attributable to changes in the discount rate affecting net loss amortization. The decrease in net periodic benefit cost for other postretirement benefit plans in 2016 as compared with 2015 is largely attributable to changes in retiree medical benefits approved by the Company in December 2015.
In connection with restructuring actions (see Note 4)5), termination charges were recorded in 2016, 20152018, 2017 and 20142016 on pension and other postretirement benefit plans related to expanded eligibility for certain employees exiting Merck. Also, in connection with these restructuring activities, curtailments were recorded on pension and other

postretirement benefit plans and settlements were recorded on certain U.S. and international pension plans as reflected in the table above.
The components of net periodic benefit cost (credit) other than the service cost component are included in Other (income) expense, net (see Note 15), with the exception of certain amounts for termination benefits, curtailments and settlements, which are recorded in Restructuring costs if the event giving rise to the termination benefits, curtailment or settlement is related to restructuring actions as noted above.


Obligations and Funded Status
Summarized information about the changes in plan assets and benefit obligations, the funded status and the amounts recorded at December 31 is as follows:
Pension Benefits 
Other
Postretirement
Benefits
Pension Benefits 
Other
Postretirement
Benefits
U.S. International U.S. International 
2016 2015 2016 2015 2016 20152018 2017 2018 2017 2018 2017
Fair value of plan assets January 1$9,266
 $9,984
 $7,204
 $7,724
 $1,913
 $1,984
$10,896
 $9,766
 $9,339
 $7,794
 $1,114
 $1,019
Actual return on plan assets941
 (226) 898
 138
 138
 (34)(810) 1,723
 (289) 677
 (72) 161
Company contributions63
 66
 424
 163
 68
 63
Company contributions, net378
 58
 167
 226
 6
 (4)
Effects of exchange rate changes
 
 (546) (568) 
 (1)
 
 (352) 843
 
 
Benefits paid(504) (523) (193) (196) (108) (99)(772) (651) (202) (198) (80) (62)
Settlements
 (35) (21) (66) 
 
(44) 
 (106) (17) 
 
Assets no longer restricted to the payment of postretirement benefits (1)

 
 
 
 (992) 
Other
 
 28
 9
 
 

 
 23
 14
 
 
Fair value of plan assets December 31$9,766
 $9,266
 $7,794
 $7,204
 $1,019
 $1,913
$9,648
 $10,896
 $8,580
 $9,339
 $968
 $1,114
Benefit obligation January 1$9,723
 $10,632
 $7,733
 $8,331
 $1,810
 $2,638
$11,904
 $10,849
 $9,483
 $8,372
 $1,922
 $1,922
Service cost282
 307
 238
 251
 54
 80
326
 312
 238
 252
 57
 57
Interest cost456
 434
 204
 206
 82
 110
432
 454
 178
 172
 69
 81
Actuarial losses (gains) (2)
854
 (1,102) 938
 (127) 77
 (384)
Actuarial (gains) losses (1)
(1,258) 881
 (154) (7) (341) (87)
Benefits paid(504) (523) (193) (196) (108) (99)(772) (651) (202) (198) (80) (62)
Effects of exchange rate changes
 
 (576) (647) 2
 (11)
 
 (387) 916
 (6) 3
Plan amendments (3)

 
 
 (1) 
 (531)
Plan amendments
 
 10
 (22) (9) 
Curtailments15
 (14) (15) (15) 1
 (3)13
 15
 (2) (3) 
 
Termination benefits23
 22
 4
 1
 4
 7
19
 44
 2
 4
 3
 8
Settlements
 (35) (21) (66) 
 
(44) 
 (106) (17) 
 
Other
 2
 60
 (4) 
 3

 
 23
 14
 
 
Benefit obligation December 31$10,849
 $9,723
 $8,372
 $7,733
 $1,922
 $1,810
$10,620
 $11,904
 $9,083
 $9,483
 $1,615
 $1,922
Funded status December 31$(1,083) $(457) $(578) $(529) $(903) $103
$(972) $(1,008) $(503) $(144) $(647) $(808)
Recognized as:                      
Other assets$
 $179
 $451
 $567
 $
 $359
$
 $
 $659
 $828
 $
 $
Accrued and other current liabilities(50) (48) (7) (7) (11) (10)(47) (59) (14) (17) (10) (11)
Other noncurrent liabilities(1,033) (588) (1,022) (1,089) (892) (246)(925) (949) (1,148) (955) (637) (797)
(1) As a result of certain allowable administrative actions that occurred in June 2016, $992 million of plan assets previously restricted for the payment of other postretirement benefits became available to fund certain other health and welfare benefits.
(2)Actuarial (gains) losses in 20162018 and actuarial gains in 20152017 primarily reflect changes in discount rates.
(3) The decline in other postretirement benefit obligations in 2015 resulting from plan amendments primarily reflects changes to Merck’s retiree medical benefits approved by the Company in December 2015. The changes provide that, beginning in 2017, Merck will provide access to retiree health insurance coverage that supplements government-sponsored Medicare through a private insurance marketplace.
At December 31, 20162018 and 2015,2017, the accumulated benefit obligation was $18.4$19.0 billion and $16.720.5 billion, respectively, for all pension plans, of which $10.510.4 billion and $9.411.5 billion, respectively, related to U.S. pension plans.

Information related to the funded status of selected pension plans at December 31 is as follows:
U.S. InternationalU.S. International
2016 2015 2016 20152018 2017 2018 2017
Pension plans with a projected benefit obligation in excess of plan assets              
Projected benefit obligation$10,849
 $1,310
 $5,486
 $5,093
$10,620
 $11,904
 $6,251
 $3,323
Fair value of plan assets9,766
 674
 4,457
 3,996
9,648
 10,896
 5,089
 2,352
Pension plans with an accumulated benefit obligation in excess of plan assets              
Accumulated benefit obligation$9,807
 $611
 $2,692
 $4,812
$9,702
 $676
 $5,936
 $2,120
Fair value of plan assets9,057
 
 1,898
 3,964
8,966
 
 5,071
 1,346

Plan Assets
Entities are required to use a fair value hierarchy which maximizes the use of observable inputs and minimizes the use of unobservable inputs when measuring fair value. There are three levels of inputs used to measure fair value with Level 1 having the highest priority and Level 3 having the lowest:
Level 1 —  Quoted prices (unadjusted) in active markets for identical assets or liabilities.
Level 2 —  Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3 —  Unobservable inputs that are supported by little or no market activity. The Level 3 assets are those whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques with significant unobservable inputs, as well as instruments for which the determination of fair value requires significant judgment or estimation. At December 31, 20162018 and 2015,2017, $435826 million and $423488 million, respectively, or approximately 2%5% and 3%2%, respectively, of the Company’s pension investments were categorized as Level 3 assets.
If the inputs used to measure the financial assets fall within more than one level described above, the categorization is based on the lowest level input that is significant to the fair value measurement of the instrument.

The fair values of the Company’s pension plan assets at December 31 by asset category are as follows:
Fair Value Measurements Using Fair Value Measurements UsingFair Value Measurements Using Fair Value Measurements Using
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
2016 
  
 2015 
  
2018   2017  
U.S. Pension Plans                              
Assets
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
               
Cash and cash equivalents$2
 $2
 $
 $4
 $
 $
 $
 $
$40
 $
 $
 $40
 $6
 $
 $
 $6
Investment funds                              
Developed markets equities521
 
 
 521
 566
 
 
 566
169
 
 
 169
 390
 
 
 390
Emerging markets equities104
 
 
 104
 87
 
 
 87
121
 
 
 121
 138
 
 
 138
Equity securities                              
Developed markets2,521
 
 
 2,521
 2,444
 
 
 2,444
2,172
 
 
 2,172
 2,743
 
 
 2,743
Fixed income securities                              
Government and agency obligations
 475
 
 475
 
 391
 
 391

 1,509
 
 1,509
 
 757
 
 757
Corporate obligations
 660
 
 660
 
 679
 
 679

 1,246
 
 1,246
 
 900
 
 900
Mortgage and asset-backed securities
 239
 
 239
 
 236
 
 236

 262
 
 262
 
 240
 
 240
Other investments
 
 18
 18
 
 
 23
 23

 
 13
 13
 
 
 15
 15
Net assets in fair value hierarchy$3,148
 $1,376

$18

$4,542

$3,097

$1,306

$23

$4,426
$2,502
 $3,017

$13

$5,532

$3,277

$1,897

$15

$5,189
Investments measured at NAV practical expedient (1)
      5,224
       4,840
Investments measured at NAV (1)
      4,116
       5,707
Plan assets at fair value      $9,766
       $9,266
      $9,648
       $10,896
International Pension Plans                              
Assets
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
      
       
Cash and cash equivalents$42
 $11
 $
 $53
 $63
 $4
 $
 $67
$50
 $3
 $
 $53
 $54
 $19
 $
 $73
Investment funds      
       
      
       
Developed markets equities187
 2,846
 
 3,033
 184
 2,738
 
 2,922
461
 3,071
 
 3,532
 562
 3,326
 
 3,888
Emerging markets equities24
 148
 
 172
 21
 137
 
 158
56
 112
 
 168
 62
 176
 
 238
Government and agency obligations123
 1,904
 
 2,027
 305
 1,115
 
 1,420
372
 2,082
 
 2,454
 249
 2,095
 
 2,344
Corporate obligations2
 282
 
 284
 173
 103
 
 276
4
 7
 
 11
 5
 329
 
 334
Fixed income obligations6
 3
 
 9
 8
 3
 
 11
7
 4
 
 11
 7
 4
 
 11
Real estate (2)

 3
 4
 7
 
 3
 5
 8

 1
 1
 2
 
 1
 2
 3
Equity securities      
       
      
       
Developed markets565
 
 
 565
 496
 
 
 496
544
 
 
 544
 660
 
 
 660
Fixed income securities      
       
      
       
Government and agency obligations2
 235
 
 237
 2
 465
 
 467
2
 291
 
 293
 2
 266
 
 268
Corporate obligations
 92
 
 92
 
 161
 
 161
1
 113
 
 114
 1
 118
 
 119
Mortgage and asset-backed securities
 50
 
 50
 
 68
 
 68

 55
 
 55
 
 55
 
 55
Other investments      
       
      
       
Insurance contracts (3)

 59
 412
 471
 
 57
 393
 450

 66
 811
 877
 
 67
 470
 537
Other1
 4
 1
 6
 
 3
 2
 5

 4
 1
 5
 
 6
 1
 7
Net assets in fair value hierarchy$952
 $5,637
 $417
 $7,006
 $1,252
 $4,857
 $400
 $6,509
$1,497
 $5,809
 $813
 $8,119
 $1,602
 $6,462
 $473
 $8,537
Investments measured at NAV practical expedient (1)
      788
       695
Investments measured at NAV (1)
      461
       802
Plan assets at fair value      $7,794
       $7,204
      $8,580
       $9,339
(1) 
Certain investments that were measured at net asset value (NAV) per share or its equivalent as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the fair value of plan assets at December 31, 20162018 and 2015.2017.
(2) 
The plans’ Level 3 investments in real estate funds are generally valued by market appraisals of the underlying investments in the funds.
(3) 
The plans’ Level 3 investments in insurance contracts are generally valued using a crediting rate that approximates market returns and invest in underlying securities whose market values are unobservable and determined using pricing models, discounted cash flow methodologies, or similar techniques.

The table below provides a summary of the changes in fair value, including transfers in and/or out, of all financial assets measured at fair value using significant unobservable inputs (Level 3) for the Company’s pension plan assets:
2016 20152018 2017
Insurance
Contracts
 
Real
Estate
 Other Total 
Insurance
Contracts
 
Real
Estate
 Other Total
Insurance
Contracts
 
Real
Estate
 Other Total 
Insurance
Contracts
 
Real
Estate
 Other Total
U.S. Pension Plans                              
Balance January 1$
 $
 $23
 $23
 $
 $
 $28
 $28
$
 $
 $15
 $15
 $
 $
 $18
 $18
Actual return on plan assets:                              
Relating to assets still held at December 31
 
 (3) (3) 
 
 (3) (3)
 
 (3) (3) 
 
 (2) (2)
Relating to assets sold during the year
 
 4
 4
 
 
 5
 5

 
 4
 4
 
 
 4
 4
Purchases and sales, net
 
 (6) (6) 
 
 (7) (7)
 
 (3) (3) 
 
 (5) (5)
Balance December 31$

$

$18

$18

$

$

$23

$23
$

$

$13

$13

$

$

$15

$15
International Pension Plans                              
Balance January 1$393
 $5
 $2
 $400
 $394
 $23
 $2
 $419
$470
 $2
 $1
 $473
 $412
 $4
 $1
 $417
Actual return on plan assets:                              
Relating to assets still held at December 31(9) 1
 
 (8) (28) (2) 
 (30)(32) 
 
 (32) 52
 
 
 52
Purchases and sales, net2
 (2) (1) (1) 2
 (16) 
 (14)380
 (1) 
 379
 5
 (2) 
 3
Transfers into Level 326
 
 
 26
 25
 
 
 25
(7) 
 
 (7) 1
 
 
 1
Balance December 31$412

$4

$1

$417

$393

$5

$2

$400
$811

$1

$1

$813

$470

$2

$1

$473
The fair values of the Company’s other postretirement benefit plan assets at December 31 by asset category are as follows:
Fair Value Measurements Using Fair Value Measurements UsingFair Value Measurements Using Fair Value Measurements Using
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total 
Quoted Prices
In Active
Markets for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
 Total
2016    2015   2018    2017   
Assets                              
Cash and cash equivalents$125
 $
 $
 $125
 $65
 $
 $
 $65
$78
 $
 $
 $78
 $97
 $
 $
 $97
Investment funds                              
Developed markets equities48
 
 
 48
 53
 
 
 53
16
 
 
 16
 37
 
 
 37
Emerging markets equities10
 
 
 10
 29
 
 
 29
12
 
 
 12
 13
 
 
 13
Government and agency obligations1
 
 
 1
 2
 
 
 2
1
 
 
 1
 1
 
 
 1
Equity securities                              
Developed markets231
 
 
 231
 229
 
 
 229
200
 
 
 200
 256
 
 
 256
Fixed income securities                              
Government and agency obligations
 43
 
 43
 
 339
 
 339

 141
 
 141
 
 71
 
 71
Corporate obligations
 60
 
 60
 
 311
 
 311

 116
 
 116
 
 84
 
 84
Mortgage and asset-backed securities
 22
 
 22
 
 218
 
 218

 24
 
 24
 
 23
 
 23
Net assets in fair value hierarchy$415
 $125
 $
 $540
 $378
 $868
 $
 $1,246
$307
 $281
 $
 $588
 $404
 $178
 $
 $582
Investments measured at NAV practical expedient (1)
      479
       667
Investments measured at NAV (1)
      380
       532
Plan assets at fair value      $1,019
       $1,913
      $968
       $1,114
(1) 
Certain investments that were measured at net asset value (NAV) per share or its equivalent as a practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the fair value of plan assets at December 31, 20162018 and 2015.2017.
The Company has established investment guidelines for its U.S. pension and other postretirement plans to create an asset allocation that is expected to deliver a rate of return sufficient to meet the long-term obligation of each

plan, given an acceptable level of risk. The target investment portfolio of the Company’s U.S. pension and other postretirement benefit plans is allocated 40%30% to 60%50% in U.S. equities, 20% to 40% in international equities, 15% to 25%30% in international equities, 30% to 45% in fixed-income investments, and up to 5% in cash and other investments. The portfolio’s equity weighting is consistent with the long-term nature of the plans’ benefit obligations. The expected annual standard deviation of returns of the target portfolio, which approximates 13%11%, reflects both the equity allocation and the diversification benefits among the asset classes in which the portfolio invests. For international pension plans, the targeted investment portfolio varies based on the duration of pension liabilities and local government rules and regulations. Although a significant percentage of plan assets are invested in U.S. equities, concentration risk is mitigated through the use of strategies that are diversified within management guidelines.

Expected Contributions
Expected contributions during 20172019 are approximately $50 million for U.S. pension plans, approximately $160$150 million for international pension plans and approximately $2515 million for other postretirement benefit plans.

Expected Benefit Payments
Expected benefit payments are as follows:
U.S. Pension Benefits 
International Pension
Benefits
 
Other
Postretirement
Benefits
U.S. Pension Benefits 
International Pension
Benefits
 
Other
Postretirement
Benefits
2017$561
 $186
 $101
2018588
 179
 104
2019629
 195
 106
$638
 $225
 $91
2020638
 202
 111
661
 213
 95
2021655
 201
 115
680
 221
 98
2022 — 20263,596
 1,168
 641
2022685
 239
 102
2023709
 249
 105
2024 — 20283,805
 1,349
 577
Expected benefit payments are based on the same assumptions used to measure the benefit obligations and include estimated future employee service.

Amounts Recognized in Other Comprehensive Income
Net loss amounts reflect experience differentials primarily relating to differences between expected and actual returns on plan assets as well as the effects of changes in actuarial assumptions. Net loss amounts in excess of certain thresholds are amortized into net periodic benefit cost over the average remaining service life of employees. The following amounts were reflected as components of OCI:
Pension Plans 
Other Postretirement
Benefit Plans
Pension Plans 
Other Postretirement
Benefit Plans
U.S. International U.S. International 
Years Ended December 312016 2015 2014 2016 2015 2014 2016 2015 20142018 2017 2016 2018 2017 2016 2018 2017 2016
Net (loss) gain arising during the period$(743) $73
 $(2,085) $(380) $(66) $(779) $(45) $209
 $(223)$(397) $(19) $(743) $(505) $309
 $(380) $186
 $170
 $(45)
Prior service (cost) credit arising during the period(10) (13) (59) (2) (4) (8) (19) 511
 (42)(4) (13) (10) (10) 22
 (2) 2
 (31) (19)
$(753) $60
 $(2,144) $(382) $(70) $(787) $(64) $720
 $(265)$(401) $(32) $(753) $(515) $331
 $(382) $188
 $139
 $(64)
Net loss amortization included in benefit cost$119
 $214
 $135
 $87
 $118
 $74
 $3
 $5
 $1
$232
 $180
 $119
 $84
 $98
 $87
 $1
 $1
 $3
Prior service (credit) cost amortization included in benefit cost(55) (56) (61) (11) (14) (15) (106) (64) (72)(50) (53) (55) (13) (11) (11) (84) (98) (106)
$64
 $158
 $74
 $76
 $104
 $59
 $(103) $(59) $(71)$182
 $127
 $64
 $71
 $87
 $76
 $(83) $(97) $(103)
The estimated net loss (gain) and prior service cost (credit) amounts that will be amortized from AOCI into net periodic benefit cost during 20172019 are $270204 million and $(64)(62) million, respectively, for pension plans (of which $178$141 million and $(53)$(50) million, respectively, relates to U.S. pension plans) and $1$(7) million and $(99)$(78) million, respectively, for other postretirement benefit plans.

Actuarial Assumptions
The Company reassesses its benefit plan assumptions on a regular basis. The weighted average assumptions used in determining U.S. pension and other postretirement benefit plan and international pension plan information are as follows:
U.S. Pension and Other
Postretirement Benefit Plans
 International Pension Plans
U.S. Pension and Other
Postretirement Benefit Plans
 International Pension Plans
December 312016
 2015
 2014
 2016
 2015
 2014
2018
 2017
 2016
 2018
 2017
 2016
Net periodic benefit cost                      
Discount rate4.70% 4.20% 4.90% 2.80% 2.70% 3.80%3.70% 4.30% 4.70% 2.10% 2.20% 2.80%
Expected rate of return on plan assets8.60% 8.50% 8.50% 5.60% 5.70% 6.00%8.20% 8.70% 8.60% 5.10% 5.10% 5.60%
Salary growth rate4.30% 4.40% 4.50% 2.90% 2.90% 3.10%4.30% 4.30% 4.30% 2.90% 2.90% 2.90%
Benefit obligation                      
Discount rate4.30% 4.80% 4.20% 2.20% 2.80% 2.70%4.40% 3.70% 4.30% 2.20% 2.10% 2.20%
Salary growth rate4.30% 4.30% 4.40% 2.90% 2.90% 2.90%4.30% 4.30% 4.30% 2.80% 2.90% 2.90%
For both the pension and other postretirement benefit plans, the discount rate is evaluated on measurement dates and modified to reflect the prevailing market rate of a portfolio of high-quality fixed-income debt instruments that would provide the future cash flows needed to pay the benefits included in the benefit obligation as they come due. The expected rate of return for both the pension and other postretirement benefit plans represents the average rate of return to be earned on plan assets over the period the benefits included in the benefit obligation are to be paid and is determined on a plan basis. In developing theThe expected rate of return within each plan is developed considering long-term historical returns data, are considered as well ascurrent market conditions, and actual returns on the plan assets and other capital markets experience.assets. Using this reference information, the long-term return expectations for each asset category and a weighted average expected return for each plan’s target portfolio is developed, according to the allocation among those investment categories. The expected portfolio performance reflects the contribution of active management as appropriate. For 2017,2019, the expected rate of return for the Company’s U.S. pension and other postretirement benefit plans will range from 8.00%7.70% to 8.75%8.10%, as compared to a range of 7.30%7.70% to 8.75%8.30% in 2016.2018. The decrease is primarily due to a modest shift in asset allocation. The change in the weighted-average expected return on U.S. pension and other postretirement benefit plan assets from 2016 to 2018 is due to the relative weighting of the referenced plans’ assets.
The health care cost trend rate assumptions for other postretirement benefit plans are as follows:
December 312016 20152018 2017
Health care cost trend rate assumed for next year7.4% 6.8%7.0% 7.2%
Rate to which the cost trend rate is assumed to decline4.5% 4.5%4.5% 4.5%
Year that the trend rate reaches the ultimate trend rate2032
 2027
2032
 2032
A one percentage point change in the health care cost trend rate would have had the following effects:
One Percentage PointOne Percentage Point
Increase DecreaseIncrease Decrease
Effect on total service and interest cost components$12
 $(12)$11
 $(9)
Effect on benefit obligation138
 (114)88
 (74)

Savings Plans
The Company also maintains defined contribution savings plans in the United States. The Company matches a percentage of each employee’s contributions consistent with the provisions of the plan for which the employee is eligible. Total employer contributions to these plans in 2016, 20152018, 2017 and 20142016 were $126136 million, $125131 million and $124126 million, respectively.


14.15.    Other (Income) Expense, Net
Other (income) expense, net, consisted of:
Years Ended December 312016 2015 20142018 2017 2016
Interest income$(328) $(289) $(266)$(343) $(385) $(328)
Interest expense693
 672
 732
772
 754
 693
Exchange losses174
 1,277
 180
Equity income from affiliates(86) (205) (257)
Exchange losses (gains)145
 (11) 174
Income on investments in equity securities, net (1)
(324) (352) (43)
Net periodic defined benefit plan (credit) cost other than service cost(512) (512) (531)
Other, net267
 72
 (12,002)(140) 6
 224
$720
 $1,527
 $(11,613)$(402) $(500) $189
The higher exchange(1) Includes net realized and unrealized gains and losses on investments in 2015 as compared with 2016 and 2014 were related primarilyequity securities either owned directly or through ownership interests in investment funds.
Income on investments in equity securities, net, in 2018 reflects the recognition of unrealized net gains pursuant to the Venezuelan Bolívar. During the second quarterprospective adoption of 2015, upon evaluation of evolving economic conditionsASU 2016-01 on January 1, 2018 (see Note 2). The increase in Venezuela and volatility in the country, combined with a decline in transactions that were settled at the then official (CENCOEX) rate of 6.30 VEF (Bolívar Fuertes) per U.S. dollar, the Company determined it was unlikely that all outstanding net monetary assets would be settled at the CENCOEX rate. Accordingly, during the second quarter of 2015, the Company recorded a charge of $715 million to devalue its net monetary assets in Venezuela to an amount that represented the Company’s estimate of the U.S. dollar amount that would ultimately be collected. During the third quarter of 2015, the Company recorded additional exchange losses of $138 million in the aggregate reflecting the ongoing effect of translating transactions and net monetary assets consistent with the second quarter. In the fourth quarter of 2015, as a result of the further deterioration of economic conditions in Venezuela, and continued declines in transactions which were settled at the official rate, the Company began using the SIMADI rate to report its Venezuelan operations. The Company also revalued its remaining net monetary assets at the SIMADI rate (subsequently replaced with the DICOM rate), which resulted in an additional charge in the fourth quarter of 2015 of $161 million. Since January 2010, Venezuela has been designated hyperinflationary and, as a result, local foreign operations are remeasured in U.S. dollars with the impact recorded in results of operations.
The declineincome on investments in equity income from affiliatessecurities, net, in 2016 as compared with 20152017 was driven primarily by lower equity income from certain research investment funds.higher realized gains on sales.
Other, net (as presented in the table above) in 2018 includes a gain of $115 million related to the settlement of certain patent litigation (see Note 11), income of $99 million related to AstraZeneca’s option exercise (see Note 9), and a gain of $85 million resulting from the receipt of a milestone payment for an out-licensed migraine clinical development program. Other, net in 2018 also includes $144 million of goodwill impairment charges related to certain businesses in the Healthcare Services segment (see Note 8), as well as $41 million of charges related to the write-down of assets held for sale to fair value in anticipation of the dissolution of the Company’s joint venture with Supera Farma Laboratorios S.A. in Brazil.
Other, net in 2017 includes income of $232 million related to AstraZeneca’s option exercise and a $191 million loss on extinguishment of debt (see Note 10).
Other, net in 2016 includes a charge of $625 million related to settlethe previously disclosed settlement of worldwide patent litigation related to Keytruda (see Note 10), a gain of $117 million related to the settlement of other patent litigation, (see Note 10), gains of $100 million resulting from the receipt of milestone payments for out-licensed migraine clinical development programs, (see Note 3) and $98 million of income related to AstraZeneca’s option exercise (see Note 8).
Other, net in 2015 includes a $680 million net charge related to the settlement of Vioxx shareholder class action litigation (see Note 10) and an expense of $78 million for a contribution of investments in equity securities to the Merck Foundation, partially offset by a $250 million gain on the sale of certain migraine clinical development programs (see Note 3), a $147 million gain on the divestiture of Merck’s remaining ophthalmics business in international markets (see Note 3), and the recognition of $182 million of deferred income related to AstraZeneca’s option exercise.
Other, net in 2014 includes an $11.2 billion gain on the divestiture of MCC (see Note 3), a gain of $741 million related to AstraZeneca’s option exercise, a $480 million gain on the divestiture of certain ophthalmic products in several international markets (see Note 3), a gain of $204 million related to the sale of Sirna (see Note 3) and the recognition of $140 million of deferred income related to AstraZeneca’s option exercise, partially offset by a $628 million loss on extinguishment of debt (see Note 9) and a $93 million goodwill impairment charge related to the Company’s joint venture with Supera.
Interest paid was $777 million in 2018, $723 million in 2017 and $686 million in 2016, $653 million in 2015 and $852 million in 2014.2016.


15.16.    Taxes on Income
A reconciliation between the effective tax rate and the U.S. statutory rate is as follows:
2016 2015 20142018 2017 2016
Amount Tax Rate Amount Tax Rate Amount Tax RateAmount Tax Rate Amount Tax Rate Amount Tax Rate
U.S. statutory rate applied to income before taxes$1,631
 35.0 % $1,890
 35.0 % $6,049
 35.0 %$1,827
 21.0 % $2,282
 35.0 % $1,631
 35.0 %
Differential arising from:                      
Foreign earnings(1,593) (34.2) (2,105) (39.0) (1,367) (7.9)
Unremitted foreign earnings(30) (0.6) 260
 4.8
 (209) (1.2)
Tax settlements
 
 (417) (7.7) (89) (0.5)
AstraZeneca option exercise
 
 
 
 (774) (4.5)
Sale of Sirna Therapeutics, Inc.
 
 
 
 (357) (2.1)
Impact of the TCJA289
 3.3
 2,625
 40.3
 
 
Valuation allowances269
 3.1
 632
 9.7
 (5) (0.1)
Impact of purchase accounting adjustments, including amortization623
 13.4
 797
 14.8
 1,013
 5.9
267
 3.1
 713
 10.9
 623
 13.4
Foreign currency devaluation related to Venezuela
 
 321
 5.9
 
 
State taxes173
 3.7
 159
 2.9
 7
 
201
 2.3
 77
 1.2
 173
 3.7
Restructuring145
 3.1
 167
 3.1
 289
 1.7
56
 0.6
 142
 2.2
 145
 3.1
U.S. health care reform legislation68
 1.4
 66
 1.2
 134
 0.8
Divestiture of Merck Consumer Care
 
 
 
 440
 2.5
Foreign earnings(245) (2.8) (1,654) (25.4) (1,546) (33.2)
R&D tax credit(96) (1.1) (71) (1.1) (58) (1.3)
Tax settlements(22) (0.3) (356) (5.5) 
 
Other (1)
(299) (6.4) (196) (3.6) 213
 1.2
(38) (0.4) (287) (4.4) (245) (5.2)
$718
 15.4 % $942
 17.4 % $5,349
 30.9 %$2,508
 28.8 % $4,103
 62.9 % $718
 15.4 %
(1) 
Other includes the tax effecteffects of contingency reserves, research credits,losses on foreign subsidiaries and miscellaneous items.
The Company’s 2017 effective tax rate reflected a provisional impact of 40.3% for the Tax Cuts and Jobs Act (TCJA), which was enacted on December 22, 2017. Among other provisions, the TCJA reduced the U.S. federal corporate statutory tax rate from 35% to 21% effective January 1, 2018, requires companies to pay a one-time transition tax on undistributed earnings of certain foreign subsidiaries, and creates new taxes on certain foreign sourced earnings.
The Company reflected the impact of the TCJA in its 2017 financial statements. However, since application of certain provisions of the TCJA remained subject to further interpretation, in certain instances the Company made reasonable estimates of the effects of the TCJA. In 2018, these amounts were finalized as described below.
The one-time transition tax is based on the Company’s post-1986 undistributed earnings and profits (E&P). For a substantial portion of these undistributed E&P, the Company had not previously provided deferred taxes as these earnings were deemed by Merck to be retained indefinitely by subsidiary companies for reinvestment. The Company recorded a provisional amount in 2017 for its one-time transition tax liability of $5.3 billion. This provisional amount was reduced by the reversal of $2.0 billion of deferred taxes that were previously recorded in connection with the merger of Schering-Plough Corporation in 2009 for certain undistributed foreign E&P. On the basis of revised calculations of post-1986 undistributed foreign E&P and finalization of the amounts held in cash or other specified assets, the Company recognized a measurement-period adjustment of $124 million in 2018 related to the transition tax obligation, with a corresponding adjustment to income tax expense during the period, resulting in a revised transition tax obligation of $5.5 billion. The Company anticipates that it will be able to utilize certain foreign tax credits to partially reduce the transition tax payment. As permitted under the TCJA, the Company has elected to pay the one-time transition tax over a period of eight years. After payment of the amount due in 2018, the remaining transition tax liability at December 31, 2018, is $4.9 billion, of which $275 million is included in Income Taxes Payable and the remainder of $4.6 billion is included in Other Noncurrent Liabilities. As a result of the TCJA, the Company has made a determination it is no longer indefinitely reinvested with respect to its undistributed earnings from foreign subsidiaries and has provided a deferred tax liability for withholding tax that would apply.
In 2017, the Company remeasured its deferred tax assets and liabilities at the new federal statutory tax rate of 21%, which resulted in a provisional deferred tax benefit of $779 million. On the basis of clarifications to the deferred tax benefit calculation, the Company recorded measurement-period adjustments in 2018 of $32 million related to deferred income taxes.
Beginning in 2018, the TCJA includes a tax on “global intangible low-taxed income” (GILTI) as defined in the TCJA. The Company has made an accounting policy election to account for the tax effects of the GILTI tax in the income tax provision in future periods as the tax arises.

The foreign earnings tax rate differentials in the tax rate reconciliation above primarily reflect the impacts of operations in jurisdictions with different tax rates than the United States, particularly Ireland and Switzerland, as well as Singapore and Puerto Rico which operate under tax incentive grants (which begin to expire in 2022), where the earnings havehad been indefinitely reinvested, thereby yielding a favorable impact on the effective tax rate as compared with the 35.0%U.S. statutory rate.rate of 35% in 2017 and 2016 and 21% in 2018. The foreign earnings tax rate differentials do not include the impact of intangible asset impairment charges, amortization of purchase accounting adjustments or restructuring costs. These items are presented separately as they each represent a significant, separately disclosed pretax cost or charge, and a substantial portion of each of these items relates to jurisdictions with lower tax rates than the United States. Therefore, the impact of recording these expense items in lower tax rate jurisdictions is an unfavorable impact on the effective tax rate as compared to the 35.0%U.S. statutory rate.
The Company’s 2015 effective tax rate reflects the impact of the Protecting Americans From Tax Hikes Act, which was signed into law on December 18, 2015, extending the research credit permanently35% in 2017 and the controlled foreign corporation look-through provisions for five years. The Company’s 2014 effective tax rate reflects the impact of the Tax Increase Prevention Act, which was signed into law on December 19, 2014, extending the research credit2016 and the controlled foreign corporation look-through provisions for one year only.21% in 2018.
Income before taxes consisted of:
Years Ended December 312016 2015 20142018 2017 2016
Domestic$518
 $2,247
 $15,730
$3,717
 $3,483
 $518
Foreign4,141
 3,154
 1,553
4,984
 3,038
 4,141
$4,659
 $5,401
 $17,283
$8,701
 $6,521
 $4,659
Taxes on income consisted of:
Years Ended December 312016 2015 20142018 2017 2016
Current provision          
Federal$1,166
 $732
 $7,136
$536
 $5,585
 $1,166
Foreign916
 844
 438
2,281
 1,229
 916
State157
 130
 375
200
 (90) 157
2,239
 1,706
 7,949
3,017
 6,724
 2,239
Deferred provision          
Federal(1,255) (552) (2,162)(402) (2,958) (1,255)
Foreign(225) (163) (201)(64) 75
 (225)
State(41) (49) (237)(43) 262
 (41)
(1,521) (764) (2,600)(509) (2,621) (1,521)
$718
 $942
 $5,349
$2,508
 $4,103
 $718

Deferred income taxes at December 31 consisted of:
2016 20152018 2017
Assets Liabilities Assets LiabilitiesAssets Liabilities Assets Liabilities
Intangibles$86
 $3,734
 $
 $4,962
Product intangibles and licenses$720
 $1,640
 $307
 $2,256
Inventory related30
 660
 49
 752
32
 377
 29
 499
Accelerated depreciation28
 927
 43
 910

 582
 28
 642
Unremitted foreign earnings
 2,044
 
 2,124
Pensions and other postretirement benefits727
 109
 435
 131
565
 151
 498
 192
Compensation related438
 
 535
 
291
 
 314
 
Unrecognized tax benefits383
 
 412
 
174
 
 156
 
Net operating losses and other tax credit carryforwards437
 
 565
 
715
 
 654
 
Other1,128
 46
 1,217
 
621
 66
 909
 52
Subtotal3,257
 7,520
 3,256
 8,879
3,118
 2,816
 2,895
 3,641
Valuation allowance(268)   (304)  (1,348)   (900)  
Total deferred taxes$2,989
 $7,520
 $2,952
 $8,879
$1,770
 $2,816
 $1,995
 $3,641
Net deferred income taxes  $4,531
   $5,927
  $1,046
   $1,646
Recognized as:              
Other assets$546
   $608
  $656
   $573
  
Deferred income taxes  $5,077
   $6,535
  $1,702
   $2,219
The Company has net operating loss (NOL) carryforwards in several jurisdictions. As of December 31, 2016,2018, $243715 million of deferred taxes on NOL carryforwards relate to foreign jurisdictions, none of which are individually significant.jurisdictions. Valuation allowances of $268 million1.3 billion have been established on these foreign NOL carryforwards and other foreign deferred tax assets. In addition, theThe Company has $194 million of deferred tax assetsno NOL carryforwards relating to various U.S. tax credit carryforwards and NOL carryforwards, all of which are expected to be fully utilized prior to expiry.jurisdictions.
Income taxes paid in 2018, 2017 and 2016 2015were $1.5 billion, $4.9 billion and 2014 were $1.8 billion, $1.8 billion and $7.9 billion, respectively. Income taxes paid in 2014 reflects approximately $5.0 billion of taxes paid on the divestiture of MCC. Tax benefits relating to stock option exercises were $77 million in 2018, $73 million in 2017 and $147 million in 2016, 2016.$109 million in 2015 and $202 million in 2014.

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
2016 2015 20142018 2017 2016
Balance January 1$3,448
 $3,534
 $3,503
$1,723
 $3,494
 $3,448
Additions related to current year positions196
 198
 389
221
 146
 196
Additions related to prior year positions75
 53
 23
142
 520
 75
Reductions for tax positions of prior years (1)
(90) (59) (156)(73) (1,038) (90)
Settlements (1)
(92) (184) (161)(91) (1,388) (92)
Lapse of statute of limitations(43) (94) (64)(29) (11) (43)
Balance December 31$3,494
 $3,448
 $3,534
$1,893
 $1,723
 $3,494
(1) 
Amounts reflect the settlements with the IRS as discussed below.
If the Company were to recognize the unrecognized tax benefits of $3.5$1.9 billion at December 31, 2016,2018, the income tax provision would reflect a favorable net impact of $3.31.8 billion.
The Company is under examination by numerous tax authorities in various jurisdictions globally. The Company believes that it is reasonably possible that the total amount of unrecognized tax benefits as of December 31, 20162018 could decrease by up to approximately $1.7 billion750 million in the next 12 months as a result of various audit closures, settlements or the expiration of the statute of limitations. The ultimate finalization of the Company’s examinations with relevant taxing authorities can include formal administrative and legal proceedings, which could have a significant impact on the timing of the reversal of unrecognized tax benefits. The Company believes that its reserves for uncertain tax positions are adequate to cover existing risks or exposures. However, there is one item that is currently under discussion with the Internal Revenue Service (IRS) relating to the 2006 through 2008 examination. The Company has concluded that its position should be sustained upon audit. However, if this item were to result in an unfavorable outcome or settlement, it could have a material adverse impact on the Company’s financial position, liquidity and results of operations.
Expenses for interest and penalties associated with uncertain tax positions amounted to $51 million in 2018, $183 million in 2017 and $134 million in 2016, $102 million in 2015 and $9 million in 2014.2016. These amounts reflect the beneficial impacts of various tax settlements, including those discussed below. Liabilities for accrued interest and penalties were $886372 million and $766341 million as of December 31, 20162018 and 2015,2017, respectively.

In 2017, the Internal Revenue Service (IRS) concluded its examinations of Merck’s 2006-2011 U.S. federal income tax returns. As a result, the Company was required to make a payment of approximately $2.8 billion. The Company’s reserves for unrecognized tax benefits for the years under examination exceeded the adjustments relating to this examination period and therefore the Company recorded a net $234 million tax benefit in 2017. This net benefit reflects reductions in reserves for unrecognized tax benefits for tax positions relating to the years that were under examination, partially offset by additional reserves for tax positions not previously reserved for, as well as adjustments to reserves for unrecognized tax benefits relating to years which remain open to examination that are affected by this settlement.
The IRS is currently conducting examinations of the Company’s tax returns for the years 20062012 through 2008, as well as 2010 and 2011. Although the IRS’s examination of the Company’s 2002-2005 federal tax returns was concluded prior to 2015, one issue relating to a refund claim remained open. During 2015, this issue was resolved and the Company received a refund of approximately $715 million, which exceeded the receivable previously recorded by the Company, resulting in a tax benefit of $410 million.
2014. In addition, various state and foreign tax examinations are in progress. For most of its other significant taxprogress and for these jurisdictions, (both U.S. state and foreign), the Company’s income tax returns are open for examination for the period 2003 through 2016.
At December 31, 2016, foreign earnings of $63.1 billion have been retained indefinitely by subsidiary companies for reinvestment; therefore, no provision has been made for income taxes that would be payable upon the distribution of such earnings and it would not be practicable to determine the amount of the related unrecognized deferred income tax liability. In addition, the Company has subsidiaries operating in Puerto Rico and Singapore under tax incentive grants that begin to expire in 2022.2018.


16.17.    Earnings per Share
The calculations of earnings per share (shares in millions) are as follows:
Years Ended December 312016 2015 20142018 2017 2016
Net income attributable to Merck & Co., Inc.$3,920
 $4,442
 $11,920
$6,220
 $2,394
 $3,920
Average common shares outstanding2,766
 2,816
 2,894
2,664
 2,730
 2,766
Common shares issuable (1)
21
 25
 34
15
 18
 21
Average common shares outstanding assuming dilution2,787
 2,841
 2,928
2,679
 2,748
 2,787
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders$1.42
 $1.58
 $4.12
$2.34
 $0.88
 $1.42
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders$1.41
 $1.56
 $4.07
$2.32
 $0.87
 $1.41
(1) 
Issuable primarily under share-based compensation plans.
In 2018, 2017 and 2016, 2015 and 2014, 136 million, 95 million and 413 million, respectively, of common shares issuable under share-based compensation plans were excluded from the computation of earnings per common share assuming dilution because the effect would have been antidilutive.
17.

18.   Other Comprehensive Income (Loss)
Changes in AOCI by component are as follows:
Derivatives Investments 
Employee
Benefit
Plans
 
Cumulative
Translation
Adjustment
 
Accumulated Other
Comprehensive
Income (Loss)
Derivatives Investments 
Employee
Benefit
Plans
 
Cumulative
Translation
Adjustment
 
Accumulated Other
Comprehensive
Income (Loss)
Balance January 1, 2014, net of taxes$132
 $54
 $(909) $(1,474) $(2,197)
Other comprehensive income (loss) before reclassification adjustments, pretax778
 48
 (3,196) (412) (2,782)
Tax(285) (17) 1,067
 (92) 673
Other comprehensive income (loss) before reclassification adjustments, net of taxes493
 31
 (2,129) (504) (2,109)
Reclassification adjustments, pretax(146)
(1) 
43
(2) 
62
(3) 

 (41)
Tax51
 (17) (10) 
 24
Reclassification adjustments, net of taxes(95) 26
 52
 
 (17)
Other comprehensive income (loss), net of taxes398
 57
 (2,077) (504) (2,126)
Balance December 31, 2014, net of taxes530
 111
 (2,986) (1,978) (4,323)
Other comprehensive income (loss) before reclassification adjustments, pretax526
 (9) 710
 (158) 1,069
Tax(177) (13) (272) (28) (490)
Other comprehensive income (loss) before reclassification adjustments, net of taxes349
 (22) 438
 (186) 579
Reclassification adjustments, pretax(731)
(1) 
(73)
(2) 
203
(3) 
(22) (623)
Tax256
 25
 (62) 
 219
Reclassification adjustments, net of taxes(475) (48) 141
 (22) (404)
Other comprehensive income (loss), net of taxes(126) (70) 579
 (208) 175
Balance December 31, 2015, net of taxes404
 41
 (2,407)
(4) 
(2,186) (4,148)
Balance January 1, 2016, net of taxes$404
 $41
 $(2,407) $(2,186) $(4,148)
Other comprehensive income (loss) before reclassification adjustments, pretax210
 (38) (1,199) (150) (1,177)210
 (38) (1,199) (150) (1,177)
Tax(72) 16
 363
 (19) 288
(72) 16
 363
 (19) 288
Other comprehensive income (loss) before reclassification adjustments, net of taxes138
 (22) (836) (169) (889)138
 (22) (836) (169) (889)
Reclassification adjustments, pretax(314)
(1) 
(31)
(2) 
37
(3) 

 (308)(314)
(1) 
(31)
(2) 
37
(3) 

 (308)
Tax110
 9
 
 
 119
110
 9
 
 
 119
Reclassification adjustments, net of taxes(204) (22) 37
 
 (189)(204) (22) 37
 
 (189)
Other comprehensive income (loss), net of taxes(66) (44) (799) (169) (1,078)(66) (44) (799) (169) (1,078)
Balance December 31, 2016, net of taxes$338
 $(3) $(3,206)
(4) 
$(2,355) $(5,226)338
 (3) (3,206) (2,355) (5,226)
Other comprehensive income (loss) before reclassification adjustments, pretax(561) 212
 438
 235
 324
Tax207
 (35) (106) 166
 232
Other comprehensive income (loss) before reclassification adjustments, net of taxes(354) 177
 332
 401
 556
Reclassification adjustments, pretax(141)
(1) 
(291)
(2) 
117
(3) 

 (315)
Tax49
 56
 (30) 
 75
Reclassification adjustments, net of taxes(92) (235) 87
 
 (240)
Other comprehensive income (loss), net of taxes(446) (58) 419
 401
 316
Balance December 31, 2017, net of taxes(108) (61) (2,787)
(4) 
(1,954) (4,910)
Other comprehensive income (loss) before reclassification adjustments, pretax228
 (108) (728) (84) (692)
Tax(55) 1
 169
 (139) (24)
Other comprehensive income (loss) before reclassification adjustments, net of taxes173
 (107) (559) (223) (716)
Reclassification adjustments, pretax157
(1) 
97
(2) 
170
(3) 

 424
Tax(33) 
 (36) 
 (69)
Reclassification adjustments, net of taxes124
 97
 134
 
 355
Other comprehensive income (loss), net of taxes297
 (10) (425) (223) (361)
         
Adoption of ASU 2018-02 (see Note 2)(23) 1
 (344) 100
 (266)
Adoption of ASU 2016-01 (see Note 2)
 (8) 
 
 (8)
         
Balance December 31, 2018, net of taxes$166

$(78)
$(3,556)
(4) 
$(2,077) $(5,545)
(1) 
Relates to foreign currency cash flow hedges that were reclassified from AOCI to Sales.
(2) 
Represents net realized (gains) losses on the sales of available-for-sale investments that were reclassified from AOCI to Other (income) expense, net. In 2017 and 2016, these amounts included both investments in debt and equity securities; however, as a result of the adoption of ASU 2016-01 (see Note 2), in 2018, these amounts relate only to investments in available-for-sale debt securities.
(3) 
Includes net amortization of prior service cost and actuarial gains and losses included in net periodic benefit cost (see Note 13)14).
(4) 
Includes pension plan net loss of $3.9$4.4 billion and $3.3$3.5 billion at December 31, 20162018 and 2015,2017, respectively, and other postretirement benefit plan net (gain) loss of $115$(170) million and $86$(16) million at December 31, 20162018 and in 2015,2017, respectively, as well as pension plan prior service credit of $361$314 million and $414$326 million at December 31, 20162018 and 2015,2017, respectively, and other postretirement benefit plan prior service credit of $466$375 million and $547$383 million at December 31, 20162018 and 2015,2017, respectively.

18.
19.    Segment Reporting
The Company’s operations are principally managed on a products basis and are comprised ofinclude four operating segments, which are the Pharmaceutical, Animal Health, Healthcare Services and Alliances.Alliances segments. The Pharmaceutical and Animal Health segments are the only reportable segments. The Animal Health Healthcare Services and Alliances segments are not materialsegment met the criteria for separate reporting.reporting and became a reportable segment in 2018.
The Pharmaceutical segment includes human health pharmaceutical and vaccine products. Human health pharmaceutical products consist of therapeutic and preventive agents, generally sold by prescription, for the treatment of human disorders. The Company sells these human health pharmaceutical products primarily to drug wholesalers and retailers, hospitals, government agencies and managed health care providers such as health maintenance organizations, pharmacy benefit managers and other institutions. VaccineHuman health vaccine products consist of preventive pediatric, adolescent and adult vaccines, primarily administered at physician offices. The Company sells these human health vaccines primarily to physicians, wholesalers, physician distributors and government entities. A large component of pediatric and adolescent vaccine sales are made to the U.S. Centers for Disease Control and Prevention Vaccines for Children program, which is funded by the U.S. government. Additionally, the Company sells vaccines to the Federal government for placement into vaccine stockpiles. Sales of vaccines in most major European markets were marketed through the Company’s SPMSD joint venture until its termination on December 31, 2016 (see Note 8)9).
The Company also has animal health operations that discover, develop, manufactureAnimal Health segment discovers, develops, manufactures and marketmarkets animal health products, including vaccines,pharmaceutical and vaccine products, for the prevention, treatment and control of disease in all major livestock and companion animal species, which the Company sells to veterinarians, distributors and animal producers. During 2016, the Company made changes to the composition of the Animal Health segment that resulted in the inclusion of certain revenues and costs that were previously included in non-segment revenues and profits. Prior periods have been recast to reflect these changes on a comparable basis.
The Company’s Healthcare Services segment provides services and solutions that focus on engagement, health analytics and clinical services to improve the value of care delivered to patients. Merck’s
The Alliances segment primarily includes resultsactivity from the Company’s relationship with AZLP until the terminationAstraZeneca LP related to sales of that relationship on June 30, 2014Nexium and Prilosec, which concluded in 2018 (see Note 8). On October 1, 2014, the Company divested its Consumer Care segment that developed, manufactured and marketed over-the-counter, foot care and sun care products (see Note 3)9).


Sales of the Company’s products were as follows:
Years Ended December 312016 2015 20142018 2017 2016
Primary Care and Women’s Health     
Cardiovascular     
Zetia$2,560
 $2,526
 $2,650
Vytorin1,141
 1,251
 1,516
Diabetes     
Januvia3,908
 3,863
 3,931
Janumet2,201
 2,151
 2,071
General Medicine and Women’s Health     
NuvaRing777
 732
 723
Implanon/Nexplanon606
 588
 502
Dulera436
 536
 460
Follistim AQ355
 383
 412
Hospital and Specialty     
Hepatitis     
Zepatier555
 
 
HIV     
Isentress1,387
 1,511
 1,673
Hospital Acute Care     
Cubicin (1)
1,087
 1,127
 25
Noxafil595
 487
 402
Invanz561
 569
 529
Cancidas558
 573
 681
Bridion482
 353
 340
Primaxin297
 313
 329
Immunology     
Remicade1,268
 1,794
 2,372
Simponi766
 690
 689
U.S. Int’l Total U.S. Int’l Total U.S. Int’l Total
Pharmaceutical:                 
Oncology                      
Keytruda1,402
 566
 55
$4,150
 $3,021
 $7,171
 $2,309
 $1,500
 $3,809
 $792
 $610
 $1,402
Emend549
 535
 553
312
 210
 522
 342
 213
 556
 356
 193
 549
Temodar283
 312
 350
6
 209
 214
 16
 256
 271
 15
 268
 283
Diversified Brands     
Respiratory     
Singulair915
 931
 1,092
Nasonex537
 858
 1,099
Other     
Cozaar/Hyzaar511
 667
 806
Arcoxia450
 471
 519
Fosamax284
 359
 470
Zocor186
 217
 258
Vaccines (2)
     
Alliance revenue - Lynparza127
 61
 187
 
 20
 20
 
 
 
Alliance revenue - Lenvima95
 54
 149
 
 
 
 
 
 
Vaccines (1)
                 
Gardasil/Gardasil 9
2,173
 1,908
 1,738
1,873
 1,279
 3,151
 1,565
 743
 2,308
 1,780
 393
 2,173
ProQuad/M-M-R II/Varivax1,640
 1,505
 1,394
1,430
 368
 1,798
 1,374
 303
 1,676
 1,362
 279
 1,640
Pneumovax 23627
 281
 907
 581
 240
 821
 447
 193
 641
RotaTeq496
 232
 728
 481
 204
 686
 482
 169
 652
Zostavax685
 749
 765
22
 195
 217
 422
 246
 668
 518
 168
 685
RotaTeq652
 610
 659
Pneumovax 23641
 542
 746
Other pharmaceutical (3)
4,703
 5,105
 6,233
Hospital Acute Care                 
Bridion386
 531
 917
 239
 465
 704
 77
 405
 482
Noxafil353
 389
 742
 309
 327
 636
 284
 312
 595
Invanz253
 243
 496
 361
 241
 602
 329
 233
 561
Cubicin (1)
191
 176
 367
 189
 193
 382
 906
 181
 1,087
Cancidas12
 314
 326
 20
 402
 422
 25
 533
 558
Primaxin7
 258
 265
 10
 270
 280
 4
 293
 297
Immunology                 
Simponi
 893
 893
 
 819
 819
 
 766
 766
Remicade
 582
 582
 
 837
 837
 
 1,268
 1,268
Neuroscience                 
Belsomra96
 164
 260
 98
 112
 210
 84
 70
 154
Virology                 
Isentress/Isentress HD513
 627
 1,140
 565
 639
 1,204
 721
 666
 1,387
Zepatier8
 447
 455
 771
 888
 1,660
 488
 67
 555
Cardiovascular                 
Zetia45
 813
 857
 352
 992
 1,344
 1,588
 972
 2,560
Vytorin10
 487
 497
 124
 627
 751
 473
 668
 1,141
Atozet
 347
 347
 
 225
 225
 1
 146
 146
Adempas
 329
 329
 
 300
 300
 
 169
 169
Diabetes                 
Januvia1,969
 1,718
 3,686
 2,153
 1,584
 3,737
 2,286
 1,622
 3,908
Janumet811
 1,417
 2,228
 863
 1,296
 2,158
 984
 1,217
 2,201
Women’s Health                 
NuvaRing722
 180
 902
 564
 197
 761
 576
 202
 777
Implanon/Nexplanon495
 208
 703
 496
 191
 686
 420
 186
 606
Diversified Brands                 
Singulair20
 688
 708
 40
 692
 732
 40
 874
 915
Cozaar/Hyzaar23
 431
 453
 18
 466
 484
 16
 494
 511
Nasonex23
 353
 376
 54
 333
 387
 184
 352
 537
Arcoxia
 335
 335
 
 363
 363
 
 450
 450
Follistim AQ115
 153
 268
 123
 174
 298
 157
 197
 355
Dulera186
 28
 214
 261
 26
 287
 412
 24
 436
Fosamax4
 205
 209
 6
 235
 241
 5
 279
 284
Other pharmaceutical (2)
1,228
 2,855
 4,090
 1,148
 2,917
 4,065
 1,261
 3,158
 4,420
Total Pharmaceutical segment sales35,151
 34,782
 36,042
16,608

21,081

37,689

15,854

19,536

35,390

17,073

18,077

35,151
Other segment sales (4)
3,862
 3,667
 5,758
Animal Health:                 
Livestock528
 2,102
 2,630
 471
 2,013
 2,484
 446
 1,841
 2,287
Companion Animals710
 872
 1,582
 619
 772
 1,391
 543
 648
 1,191
Total Animal Health segment sales1,238

2,974

4,212

1,090

2,785

3,875

989

2,489

3,478
Other segment sales (3)
248
 2
 250
 396
 1
 397
 385
 
 385
Total segment sales39,013
 38,449
 41,800
18,094

24,057

42,151

17,340

22,322

39,662

18,447

20,566

39,014
Other (5)
794
 1,049
 437
Other (4)
118
 26
 143
 84
 376
 460
 31
 763
 793
$39,807
 $39,498
 $42,237
$18,212
 $24,083

$42,294

$17,424
 $22,698

$40,122

$18,478
 $21,329

$39,807
U.S. plus international may not equal total due to rounding.
(1) 
Sales of Cubicin in 2015 represent sales subsequent to the Cubist acquisition date. Sales of Cubicin in 2014 reflect sales in Japan pursuant to a previously existing licensing agreement.
(2)
These amounts do not reflect sales ofOn December 31, 2016, Merck and Sanofi terminated their equally-owned joint venture, SPMSD, which marketed vaccines sold in most major European markets through(see Note 9). Accordingly, vaccine sales in 2018 and 2017 include sales in the Company’s joint venture,European markets that were previously part of SPMSD. Amounts for 2016 do not include sales of vaccines sold through SPMSD, the results of which are reflected in equity income from affiliates which is included in Other (income) expense, net. These amountsAmounts for 2016 do, however, reflectinclude supply sales to SPMSD. On December 31, 2016, Merck and Sanofi terminated the SPMSD joint venture (see Note 8).
(3)(2) 
Other pharmaceutical primarily reflects sales of other human health pharmaceutical products, including products within the franchises not listed separately.
(4)(3) 
Represents the non-reportable segments of Animal Health, Healthcare Services and Alliances, as well as Consumer Care until its divestiture on October 1, 2014 (see Note 3). The Alliances segment includes revenue from the Company’s relationship with AZLP until termination on June 30, 2014 (see Note 8).Alliances.
(5)(4) 
Other is primarily comprised of miscellaneous corporate revenues, including revenue hedging activities, as well as third-party manufacturing sales. Other in 20162018, 2017 and 20142016 also includes approximately $95 million, $85 million and $170 million, and $232 million, respectively, in connection withrelated to the sale of the marketing rights to certain products.

Consolidated revenues by geographic area where derived are as follows:
Years Ended December 312016 2015 20142018 2017 2016
United States$18,478
 $17,519
 $17,071
$18,212
 $17,424
 $18,478
Europe, Middle East and Africa10,953
 10,677
 13,174
12,213
 11,478
 10,953
Asia Pacific3,918
 3,825
 3,952
Japan2,846
 2,673
 3,471
3,212
 3,122
 2,846
Asia Pacific (other than Japan and China)2,909
 2,751
 2,483
Latin America2,155
 2,825
 3,151
2,415
 2,339
 2,155
China2,184
 1,586
 1,435
Other1,457
 1,979
 1,418
1,149
 1,422
 1,457
$39,807
 $39,498
 $42,237
$42,294
 $40,122
 $39,807
A reconciliation of total segment profits to consolidated Income before taxes is as follows:
Years Ended December 312016 2015 20142018 2017 2016
Segment profits:          
Pharmaceutical segment$22,180
 $21,658
 $22,164
$24,292
 $22,495
 $22,141
Animal Health segment1,659
 1,552
 1,357
Other segments1,507
 1,573
 2,386
103
 275
 146
Total segment profits23,687
 23,231
 24,550
26,054
 24,322
 23,644
Other profits481
 810
 627
6
 26
 481
Unallocated:          
Interest income328
 289
 266
343
 385
 328
Interest expense(693) (672) (732)(772) (754) (693)
Equity income from affiliates(19) 135
 59
Depreciation and amortization(1,585) (1,573) (2,452)(1,334) (1,378) (1,585)
Research and development(9,084) (5,871) (5,823)(8,853) (9,481) (9,218)
Amortization of purchase accounting adjustments(3,692) (4,816) (4,182)(2,664) (3,056) (3,692)
Restructuring costs(651) (619) (1,013)(632) (776) (651)
Charge related to termination of collaboration agreement with Samsung(423) 
 
Loss on extinguishment of debt
 (191) 
Gain on sale of certain migraine clinical development programs100
 250
 

 
 100
Charge related to the settlement of worldwide Keytruda patent litigation
(625) 
 

 
 (625)
Gain on divestiture of certain ophthalmic products
 147
 480
Foreign currency devaluation related to Venezuela
 (876) 
Net charge related to the settlement of Vioxx shareholder class action litigation

 (680) 
Gain on divestiture of Merck Consumer Care
 
 11,209
Gain on AstraZeneca option exercise
 
 741
Loss on extinguishment of debt
 
 (628)
Other unallocated, net(3,588) (4,354) (5,819)(3,024) (2,576) (3,430)
$4,659
 $5,401
 $17,283
$8,701
 $6,521
 $4,659
SegmentPharmaceutical segment profits are comprised of segment sales less standard costs, as well as selling, general and certain operatingadministrative expenses and research and development costs directly incurred by the segments.segment. Animal Health segment profits are comprised of segment sales, less all cost of sales, as well as selling, general and administrative expenses and research and development costs directly incurred by the segment. For internal management reporting presented to the chief operating decision maker, Merck does not allocate materials and production costs, other than standard costs, the majorityremaining cost of sales not included in segment profits as described above, research and development expenses incurred in Merck Research Laboratories, the Company’s research and development division that focuses on human health-related activities, or general and administrative expenses, nor the cost of financing these activities. Separate divisions maintain responsibility for monitoring and managing these costs, including depreciation related to fixed assets utilized by these divisions and, therefore, they are not included in segment profits. In addition, costs related to restructuring activities, as well as the amortization of purchase accounting adjustments are not allocated to segments.
Other profits are primarily comprised of miscellaneous corporate profits, as well as operating profits related to third-party manufacturing sales.

Other unallocated, net includes expenses from corporate and manufacturing cost centers, goodwill and other intangible asset impairment charges, gains or losses on sales of businesses, expense or income related to changes in the estimated fair value of liabilities for contingent consideration, and other miscellaneous income or expense items.

In 2018, the Company adopted a new accounting standard related to the classification of certain defined benefit plan costs (see Note 2), which resulted in a change to the measurement of segment profits. Net periodic benefit cost (credit) other than service cost is no longer included as a component of segment profits. Prior period amounts have been recast to conform to the new presentation.
Equity income(income) loss from affiliates and depreciation and amortization included in segment profits is as follows:
Pharmaceutical All Other TotalPharmaceutical Animal Health All Other Total
Year Ended December 31, 2018          
Included in segment profits:       
Equity (income) loss from affiliates$4
 $
 $
 $4
Depreciation and amortization243
 82
 10
 335
Year Ended December 31, 2017          
Included in segment profits:       
Equity (income) loss from affiliates$7
 $
 $
 $7
Depreciation and amortization125
 75
 12
 212
Year Ended December 31, 2016                  
Included in segment profits:            
Equity income from affiliates$105
 $
 $105
Equity (income) loss from affiliates$(105) $
 $
 $(105)
Depreciation and amortization(160) (23) (183)160
 10
 13
 183
Year Ended December 31, 2015        
Included in segment profits:     
Equity income from affiliates$70
 $
 $70
Depreciation and amortization(82) (18) (100)
Year Ended December 31, 2014        
Included in segment profits:     
Equity income from affiliates$90
 $108
 $198
Depreciation and amortization(39) (18) (57)
Property, plant and equipment, net, by geographic area where located is as follows:
December 312016 2015 20142018 2017 2016
United States$8,114
 $8,467
 $8,727
$8,306
 $8,070
 $8,114
Europe, Middle East and Africa2,732
 2,844
 3,120
3,706
 3,151
 2,732
Asia Pacific775
 842
 897
Asia Pacific (other than Japan and China)684
 632
 623
Latin America234
 182
 207
264
 271
 234
China167
 150
 152
Japan164
 164
 172
159
 158
 164
Other7
 8
 13
5
 7
 7
$12,026
 $12,507
 $13,136
$13,291
 $12,439
 $12,026
The Company does not disaggregate assets on a products and services basis for internal management reporting and, therefore, such information is not presented.

Report of Independent Registered Public Accounting Firm

To the Board of Directors and ShareholdersStockholders of Merck & Co., Inc.:

Opinions on the Financial Statements and Internal Control over Financial Reporting

In our opinion,We have audited the accompanying consolidated balance sheets of Merck & Co., Inc and its subsidiaries (the “Company”) as of December 31, 2018 and 2017, and the related consolidated statements of income, comprehensive income, equity and cash flows present fairly, in all material respects, the financial position of Merck & Co., Inc. and its subsidiaries at December 31, 2016and December 31, 2015, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 20162018, including the related notes (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016 ,2018, based on criteria established in Internal Control - Integrated Framework (2013)issued by the Committee of Sponsoring Organizations ofCOSO.

Change in Accounting Principle

As discussed in Note 2 to the Treadway Commission (COSO). consolidated financial statements, the Company changed the manner in which it accounts for retirement benefits in 2018.


Basis for Opinions

The Company'sCompany’s management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management'sManagement’s Report on Internal Control Over Financial Reporting appearing under Item 9a.9A. Our responsibility is to express opinions on thesethe Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our integrated audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidatedfinancial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence supportingregarding the amounts and disclosures in the consolidated financial statements, assessingstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, andas well as evaluating the overall presentation of the consolidated financial statement presentation.statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.


Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

apwcsignature.jpg 
PricewaterhouseCoopers LLP
Florham Park, New Jersey
February 28, 201727, 2019

We have served as the Company’s auditor since 2002.


(b)Supplementary Data
Selected quarterly financial data for 20162018 and 20152017 are contained in the Condensed Interim Financial Data table below.
Condensed Interim Financial Data (Unaudited)
($ in millions except per share amounts)
4th Q (1)
 
3rd Q (2)
 
2nd Q (3)
 1st Q
4th Q (1)
 
3rd Q (2)
 2nd Q 
1st Q (3)
2016 (4)
       
2018 (4)
       
Sales$10,115
 $10,536
 $9,844
 $9,312
$10,998
 $10,794
 $10,465
 $10,037
Materials and production3,332
 3,409
 3,578
 3,572
Marketing and administrative2,593
 2,393
 2,458
 2,318
Research and development4,650
 1,664
 2,151
 1,659
Restructuring costs265
 161
 134
 91
Other (income) expense, net631
 22
 19
 48
(Loss) income before taxes(1,356) 2,887
 1,504
 1,624
Net (loss) income attributable to Merck & Co., Inc.(594) 2,184
 1,205
 1,125
Basic (loss) earnings per common share attributable to Merck & Co., Inc. common shareholders$(0.22) $0.79
 $0.44
 $0.41
(Loss) earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders$(0.22) $0.78
 $0.43
 $0.40
2015 (4)
       
Sales$10,215
 $10,073
 $9,785
 $9,425
Materials and production3,850
 3,761
 3,754
 3,569
Marketing and administrative2,615
 2,472
 2,624
 2,601
Cost of sales3,289
 3,619
 3,417
 3,184
Selling, general and administrative2,643
 2,443
 2,508
 2,508
Research and development1,797
 1,500
 1,670
 1,737
2,214
 2,068
 2,274
 3,196
Restructuring costs233
 113
 191
 82
138
 171
 228
 95
Other (income) expense, net905
 (170) 739
 55
110
 (172) (48) (291)
Income before taxes815
 2,397
 807
 1,381
2,604
 2,665
 2,086
 1,345
Net income attributable to Merck & Co., Inc.976
 1,826
 687
 953
1,827
 1,950
 1,707
 736
Basic earnings per common share attributable to Merck & Co., Inc. common shareholders$0.35
 $0.65
 $0.24
 $0.34
$0.70
 $0.73
 $0.64
 $0.27
Earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders$0.35
 $0.64
 $0.24
 $0.33
$0.69
 $0.73
 $0.63
 $0.27
2017 (4) (5)
       
Sales$10,433
 $10,325
 $9,930
 $9,434
Cost of sales3,440
 3,307
 3,116
 3,049
Selling, general and administrative2,643
 2,459
 2,500
 2,472
Research and development2,314
 4,413
 1,782
 1,830
Restructuring costs306
 153
 166
 151
Other (income) expense, net(149) (207) (73) (71)
Income before taxes1,879
 200
 2,439
 2,003
Net (loss) income attributable to Merck & Co., Inc.(1,046) (56) 1,946
 1,551
Basic (loss) earnings per common share attributable to Merck & Co., Inc. common shareholders$(0.39) $(0.02) $0.71
 $0.56
(Loss) earnings per common share assuming dilution attributable to Merck & Co., Inc. common shareholders$(0.39) $(0.02) $0.71
 $0.56
(1) 
Amounts for 20162017 include a charge to settle worldwide patent litigation related to Keytruda (see Note 10). Amounts for 2015 reflect aprovisional net tax charge related to the settlementenactment of Vioxx shareholder class action litigationU.S. tax legislation (see Note 10), foreign exchange losses related to Venezuela (see Note 14) and a gain on the sale of the Company’s remaining ophthalmics business in international markets (see Note 3)16).
(2) 
Amounts for 20152017 include a gain oncharge related to the saleformation of certain migraine clinical development programsa collaboration with AstraZeneca (see Note 3)4).
(3) Amounts for 2015 include foreign exchange losses related to the devaluation of the Company’s net monetary assets in Venezuela (see Note 14).
(4)(3) 
Amounts for 2016 and 2015 reflect acquisition and divestiture-related costs (see Note 7) and2018 include a charge related to the impactformation of restructuring actionsa collaboration with Eisai (see Note 4).
(4) Amounts for 2018 and 2017 reflect acquisition and divestiture-related costs (see Note 8) and the impact of restructuring actions (see Note 5).
(5) Amounts have been recast as a result of the adoption, on January 1, 2018, of a new accounting standard related to the classification of certain defined benefit plan costs. There was no impact to net income as a result of adopting the new accounting standard (see Note 2).


Item 9.     Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
Not applicable.
Item 9A.  Controls and Procedures.
Management of the Company, with the participation of its Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of the Company’s disclosure controls and procedures. Based on their evaluation, as of the end of the period covered by this Form 10-K, the Company’s Chief Executive Officer and Chief Financial Officer have concluded that the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934, as amended (the Act)) are effective. For the fourth quarter of 2018, there have been no changes in internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.
Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a-15(f) of the Act. Management conducted an evaluation of the effectiveness of internal control over financial reporting based on the framework in Internal Control — Integrated Framework issued in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that internal control over financial reporting was effective as of December 31, 2016.2018. PricewaterhouseCoopers LLP, an independent registered public accounting firm, has performed its own assessment of the effectiveness of the Company’s internal control over financial reporting and its attestation report is included in this Form 10-K filing.
Management’s Report
Management’s Responsibility for Financial Statements
Responsibility for the integrity and objectivity of the Company’s financial statements rests with management. The financial statements report on management’s stewardship of Company assets. These statements are prepared in conformity with generally accepted accounting principles and, accordingly, include amounts that are based on management’s best estimates and judgments. Nonfinancial information included in the Annual Report on Form 10-K has also been prepared by management and is consistent with the financial statements.
To assure that financial information is reliable and assets are safeguarded, management maintains an effective system of internal controls and procedures, important elements of which include: careful selection, training and development of operating and financial managers; an organization that provides appropriate division of responsibility; and communications aimed at assuring that Company policies and procedures are understood throughout the organization. A staff of internal auditors regularly monitors the adequacy and application of internal controls on a worldwide basis.
To ensure that personnel continue to understand the system of internal controls and procedures, and policies concerning good and prudent business practices, annually all employees of the Company are required to complete Code of Conduct training, which includes financial stewardship.training. This training reinforces the importance and understanding of internal controls by reviewing key corporate policies, procedures and systems. In addition, the Company has compliance programs, including an ethical business practices program to reinforce the Company’s long-standing commitment to high ethical standards in the conduct of its business.
The financial statements and other financial information included in the Annual Report on Form 10-K fairly present, in all material respects, the Company’s financial condition, results of operations and cash flows. Our formal certification to the Securities and Exchange Commission is included in this Form 10-K filing.
Management’s Report on Internal Control Over Financial Reporting
Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a-15(f) under the Securities Exchange Act of 1934. The Company’s internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles in the United States of America. Management conducted an evaluation of the effectiveness of internal control over financial reporting based on the framework in Internal Control — Integrated Framework issued

in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that internal control over financial reporting was effective as of December 31, 2016.

2018.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
The effectiveness of the Company’s internal control over financial reporting as of December 31, 2016,2018, has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears herein.
g438975g32h99a01a05.jpg
  
 
electronicsignaturedavisa05.jpg
  
Kenneth C. Frazier Robert M. Davis
Chairman, President
and Chief Executive Officer
 
Executive Vice President, Global Services,
and Chief Financial Officer
Item 9B.Other Information.
None.

PART III
 
Item 10.Directors, Executive Officers and Corporate Governance.
The required information on directors and nominees is incorporated by reference from the discussion under Proposal 1. Election of Directors of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019. Information on executive officers is set forth in Part I of this document on page 29.32.
The required information on compliance with Section 16(a) of the Securities Exchange Act of 1934 is incorporated by reference from the discussion under the heading “Section 16(a) Beneficial Ownership Reporting Compliance” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
The Company has a Code of Conduct — Our Values and Standards applicable to all employees, including the principal executive officer, principal financial officer, principal accounting officer and Controller. The Code of Conduct is available on the Company’s website at www.merck.com/about/code_of_conduct.pdf. The Company intends to disclose future amendments to certain provisions of the Code of Conduct, and waivers of the Code of Conduct granted to executive officers and directors, if any, on the website within four business days following the date of any amendment or waiver. Every Merck employee is responsible for adhering to business practices that are in accordance with the law and with ethical principles that reflect the highest standards of corporate and individual behavior. A printed copy will be sent, without charge, to any shareholder who requests it by writing to the Chief Ethics and Compliance Officer of Merck & Co., Inc., 2000 Galloping Hill Road, Kenilworth, NJ 07033.
The required information on the identification of the audit committee and the audit committee financial expert is incorporated by reference from the discussion under the heading “Board Meetings and Committees” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
Item 11.Executive Compensation.
The information required on executive compensation is incorporated by reference from the discussion under the headings “Compensation Discussion and Analysis”, “Summary Compensation Table”, “All Other Compensation” table, “Grants of Plan-Based Awards” table, “Outstanding Equity Awards” table, “Option Exercises and Stock Vested” table, “Pension Benefits” table, “Nonqualified Deferred Compensation” table, Potential Payments Upon Termination or a Change in Control, including the discussion under the subheadings “Separation” and “Change in Control”, as well as all footnote information to the various tables, of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
The required information on director compensation is incorporated by reference from the discussion under the heading “Director Compensation” and related “Director Compensation” table and “Schedule of Director Fees” table of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
The required information under the headings “Compensation and Benefits Committee Interlocks and Insider Participation” and “Compensation and Benefits Committee Report” is incorporated by reference from the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
Information with respect to security ownership of certain beneficial owners and management is incorporated by reference from the discussion under the heading “Stock Ownership Information” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
Equity Compensation Plan Information
The following table summarizes information about the options, warrants and rights and other equity compensation under the Company’s equity compensation plans as of the close of business on December 31, 2016.2018. The table does not include information about tax qualified plans such as the Merck U.S. Savings Plan.
Plan Category 
Number of
securities to be
issued upon
exercise of
outstanding
options, warrants
and rights
(a)
 
Weighted-average
exercise price of
outstanding
options, warrants
and rights
(b)
 
Number of
securities remaining
available for future
issuance under equity
compensation plans
(excluding
securities
reflected in column (a))
(c)
 
Number of
securities to be
issued upon
exercise of
outstanding
options, warrants
and rights
(a)
 
Weighted-average
exercise price of
outstanding
options, warrants
and rights
(b)
 
Number of
securities remaining
available for future
issuance under equity
compensation plans
(excluding
securities
reflected in column (a))
(c)
Equity compensation plans approved by security holders(1)
 
45,050,279(2)

 $44.47
 124,902,265
 
23,807,101(2)

 $51.89
 110,977,283
Equity compensation plans not approved by security holders 
 
 
 
 
 
Total 45,050,279
 $44.47
 124,902,265
 23,807,101
 $51.89
 110,977,283
(1) 
Includes options to purchase shares of Company Common Stock and other rights under the following shareholder-approved plans: the Merck Sharp & Dohme 2004, 2007 and 2010 Incentive Stock Plans, the Merck & Co., Inc. 2006 and 2010 Non-Employee Directors Stock Option Plans, and the Merck & Co., Inc. Schering-Plough 2002 and 2006 Stock Incentive Plans.
(2) 
Excludes approximately 13,265,95916,128,455 shares of restricted stock units and 1,743,5872,039,065 performance share units (assuming maximum payouts) under the Merck Sharp & Dohme 2004, 2007 and 2010 Incentive Stock Plans. Also excludes 244,119224,599 shares of phantom stock deferred under the MSD Employee Deferral Program and 561,846582,155 shares of phantom stock deferred under the Merck & Co., Inc. Plan for Deferred Payment of Directors’ Compensation.
Item 13.Certain Relationships and Related Transactions, and Director Independence.
The required information on transactions with related persons is incorporated by reference from the discussion under the heading “Related Person Transactions” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
The required information on director independence is incorporated by reference from the discussion under the heading “Independence of Directors” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.
Item 14.Principal Accountant Fees and Services.
The information required for this item is incorporated by reference from the discussion under Proposal 4. Ratification of Appointment of Independent Registered Public Accounting Firm for 20172019 beginning with the caption “Pre-Approval Policy for Services of Independent Registered Public Accounting Firm” through “Fees for Services Provided by the Independent Registered Public Accounting Firm” of the Company’s Proxy Statement for the Annual Meeting of Shareholders to be held May 23, 2017.28, 2019.

PART IV
 
Item 15.Exhibits and Financial Statement Schedules.
(a)    The following documents are filed as part of this Form 10-K
1.    Financial Statements
Consolidated statement of income for the years ended December 31, 2016, 20152018, 2017 and 20142016
Consolidated statement of comprehensive income for the years ended December 31, 2016, 20152018, 2017 and 20142016
Consolidated balance sheet as of December 31, 20162018 and 20152017
Consolidated statement of equity for the years ended December 31, 2016, 20152018, 2017 and 20142016
Consolidated statement of cash flows for the years ended December 31, 2016, 20152018, 2017 and 20142016
Notes to consolidated financial statements
Report of PricewaterhouseCoopers LLP, independent registered public accounting firm
2.    Financial Statement Schedules
Schedules are omitted because they are either not required or not applicable.
Financial statements of affiliates carried on the equity basis have been omitted because, considered individually or in the aggregate, such affiliates do not constitute a significant subsidiary.
3.    Exhibits
Exhibit
Number
   Description
3.1  
3.2  
4.1  Indenture, dated as of April 1, 1991, between Merck Sharp & Dohme Corp. (f/k/a Schering Corporation) and U.S. Bank Trust National Association (as successor to Morgan Guaranty Trust Company of New York), as Trustee (the 1991 Indenture) — Incorporated by reference to Exhibit 4 to MSD’s Registration Statement on Form S-3 (No. 33-39349)
4.2  
4.3  
4.4  
4.5  
4.6  
4.7  

Exhibit
Number
   Description
4.8  
4.9  
4.10  Long-term debt instruments under which the total amount of securities authorized does not exceed 10% of Merck & Co., Inc.’s total consolidated assets are not filed as exhibits to this report. Merck & Co., Inc. will furnish a copy of these agreements to the Securities and Exchange Commission on request.
*10.1  
*10.2  
*10.3  Merck Sharp & Dohme Corp. 2004 Incentive Stock Plan (amended and restated as of November 3, 2009) — Incorporated by reference to Exhibit 10.8 to Merck & Co., Inc.’s Current Report on Form 8‑K filed November 4, 2009 (No. 1-6571)
*10.4
*10.510.4  
*10.610.5  
*10.710.6  
*10.810.7  
*10.910.8  
*10.1010.9  
*10.11Form of restricted stock unit terms for 2013 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.19 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2012 filed February 28, 2013 (No. 1-6571)
*10.1210.10  Form of performance share unit terms for 2013 grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by reference to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 (No. 1-6571)
*10.13
*10.14Form of restricted stock unit terms for 2014 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.18 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 filed February 27, 2015 (No. 1-6571)

Exhibit
Number
Description
*10.1510.11  Form of performance share unit terms for 2014 grants under the Merck & Co., Inc. 2010 Stock Incentive Plan — Incorporated by reference to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 (No. 1-6571)
*10.16
*10.17Form of restricted stock unit terms for 2015 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.20 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2015 filed February 26, 2016 (No. 1-6571)
*10.1810.12  

Exhibit
Number
Description
*10.1910.13  
*10.2010.14  
*10.2110.15  
*10.16
*10.22Merck & Co., Inc. Change in Control Separation Benefits Plan (Effective as Amended and Restated, as of January 1, 2013) — Incorporated by reference to Merck & Co., Inc.’s Current Report on Form 8‑K dated November 29, 2012 (No. 1-6571)
*10.23Merck & Co., Inc. U.S. Separation Benefits Plan (amended and restated effective as of November 15, 2014) — Incorporated by referenceExhibit 10.21 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 20142016 filed February 28, 2017 (No. 1-6571)
10.17
*10.2410.18  
*10.19
*10.2510.20  
*10.2610.21  
*10.2710.22  
*10.2810.23  
10.2910.24  
10.3010.25  
10.3110.26  
10.27
10.28
21
23
24.1
24.2

Exhibit
Number
   Description
12Computation of Ratios of Earnings to Fixed Charges
21Subsidiaries of Merck & Co., Inc.
23Consent of Independent Registered Public Accounting Firm
24.1Power of Attorney
24.2Certified Resolution of Board of Directors
31.1  
31.2  
32.1  
32.2  
101  The following materials from Merck & Co., Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016,2018, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Statement of Income, (ii) the Consolidated Statement of Comprehensive Income, (iii) the Consolidated Balance Sheet, (iv) the Consolidated Statement of Equity, (v) the Consolidated Statement of Cash Flows, and (vi) Notes to Consolidated Financial Statements.
                
*Management contract or compensatory plan or arrangement.
Certain portions of the exhibit have been omitted pursuant to a request for confidential treatment. The non-public information has been filed separately with the Securities and Exchange Commission pursuant to rule 24b-2 under the Securities Exchange Act of 1934, as amended.


Item 16.    Form 10-K Summary

Not applicable.


SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Dated:    February 28, 201727, 2019
 
MERCK & CO., INC.
  
By:KENNETH C. FRAZIER
 (Chairman, President and Chief Executive Officer)
   
 By:/S/ MICHAEL J. HOLSTONs/ JENNIFER ZACHARY
  Michael J. HolstonJennifer Zachary
  (Attorney-in-Fact)
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.
Signatures Title Date
     
KENNETH C. FRAZIER 
Chairman, President and Chief Executive Officer;
Principal Executive Officer; Director
 February 28, 201727, 2019
ROBERT M. DAVIS 
Executive Vice President, Global Services, and
Chief Financial Officer; Principal Financial Officer
 February 28, 201727, 2019
RITA A. KARACHUN 
Senior Vice President Finance-Global Controller;
Principal Accounting Officer
 February 28, 201727, 2019
LESLIE A. BRUN Director February 28, 201727, 2019
THOMAS R. CECH Director February 28, 201727, 2019
PAMELA J. CRAIG Director February 28, 201727, 2019
THOMAS H. GLOCER Director February 28, 2017
C. ROBERT KIDDERDirectorFebruary 28, 201727, 2019
ROCHELLE B. LAZARUS Director February 28, 201727, 2019
CARLOS E. REPRESASJOHN H. NOSEWORTHY Director February 28, 201727, 2019
PAUL B. ROTHMAN Director February 28, 201727, 2019
PATRICIA F. RUSSO Director February 28, 201727, 2019
CRAIG B. THOMPSONINGE G. THULIN Director February 28, 201727, 2019
WENDELL P. WEEKS Director February 28, 201727, 2019
PETER C. WENDELL Director February 28, 201727, 2019
Michael J. Holston,Jennifer Zachary, by signing hisher name hereto, does hereby sign this document pursuant to powers of attorney duly executed by the persons named, filed with the Securities and Exchange Commission as an exhibit to this document, on behalf of such persons, all in the capacities and on the date stated, such persons including a majority of the directors of the Company.
 
By: /S/ MICHAEL J. HOLSTONJENNIFER ZACHARY
  Michael J. HolstonJennifer Zachary
  (Attorney-in-Fact)


EXHIBIT INDEX
 
Exhibit
Number
   Description
3.1  
3.2  
4.1  Indenture, dated as of April 1, 1991, between Merck Sharp & Dohme Corp. (f/k/a Schering Corporation) and U.S. Bank Trust National Association (as successor to Morgan Guaranty Trust Company of New York), as Trustee (the 1991 Indenture) — Incorporated by reference to Exhibit 4 to MSD’s Registration Statement on Form S-3 (No. 33-39349)
4.2  
4.3  
4.4  
4.5  
4.6  
4.7  
4.8  
4.9  
4.10  Long-term debt instruments under which the total amount of securities authorized does not exceed 10% of Merck & Co., Inc.’s total consolidated assets are not filed as exhibits to this report. Merck & Co., Inc. will furnish a copy of these agreements to the Securities and Exchange Commission on request.
*10.1  
*10.2  
*10.3  Merck Sharp & Dohme Corp. 2004 Incentive Stock Plan (amended and restated as of November 3, 2009) — Incorporated by reference to Exhibit 10.8 to Merck & Co., Inc.’s Current Report on Form 8‑K filed November 4, 2009 (No. 1-6571)
*10.4
*10.510.4  

Exhibit
Number
   Description
*10.610.5  
*10.710.6  
*10.810.7  
*10.910.8  
*10.1010.9  
*10.11Form of restricted stock unit terms for 2013 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.19 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2012 filed February 28, 2013 (No. 1-6571)
*10.1210.10  Form of performance share unit terms for 2013 grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by reference to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 (No. 1-6571)
*10.13
*10.14Form of restricted stock unit terms for 2014 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.18 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 filed February 27, 2015 (No. 1-6571)
*10.1510.11  Form of performance share unit terms for 2014 grants under the Merck & Co., Inc. 2010 Stock Incentive Plan — Incorporated by reference to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2014 (No. 1-6571)
*10.16
*10.17Form of restricted stock unit terms for 2015 quarterly and annual grants under the Merck & Co., Inc. 2010 Incentive Stock Plan — Incorporated by referenceExhibit 10.20 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 2015 filed February 26, 2016 (No. 1-6571)
*10.1810.12  
*10.1910.13  
*10.2010.14  
*10.2110.15  
*10.16
*10.22Merck & Co., Inc. Change in Control Separation Benefits Plan (Effective as Amended and Restated, as of January 1, 2013) — Incorporated by reference to Merck & Co., Inc.’s Current Report on Form 8‑K dated November 29, 2012 (No. 1-6571)
*10.23Merck & Co., Inc. U.S. Separation Benefits Plan (amended and restated effective as of November 15, 2014) — Incorporated by referenceExhibit 10.21 to Merck & Co., Inc.’s Form 10-K Annual Report for the fiscal year ended December 31, 20142016 filed February 28, 2017 (No. 1-6571)
*10.17
*10.18

Exhibit
Number
   Description
*10.2410.19   
*10.2510.20  
*10.2610.21  
*10.2710.22  
*10.2810.23  
10.2910.24  
10.3010.25  
10.3110.26  
1210.27  Computation of Ratios of Earnings to Fixed Charges
10.28
21  
23  
24.1  
24.2  
31.1  
31.2  
32.1  
32.2  
101  The following materials from Merck & Co., Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016,2018, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Statement of Income, (ii) the Consolidated Statement of Comprehensive Income, (iii) the Consolidated Balance Sheet, (iv) the Consolidated Statement of Equity, (v) the Consolidated Statement of Cash Flows, and (vi) Notes to Consolidated Financial Statements.
                
*Management contract or compensatory plan or arrangement.
Certain portions of the exhibit have been omitted pursuant to a request for confidential treatment. The non-public information has been filed separately with the Securities and Exchange Commission pursuant to rule 24b-2 under the Securities Exchange Act of 1934, as amended.

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