As filed with the Securities and Exchange Commission on August 26, 2016

June 17, 2020

Registration No.

333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

____________________

OPGEN, INC.

(Exact Name of Registrant as Specified in Its Charter)

Delaware06-1614015
(State or Other Jurisdiction of(I.R.S. Employer
Incorporation or Organization)Identification Number)

708 Quince Orchard Road, Suite 205

Gaithersburg, MD 20878

(240) 813-1260

(301) 869-9683

(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant'sRegistrant’s Principal Executive Offices)

____________________

Timothy C. Dec

Oliver Schacht, Ph.D.

Chief FinancialExecutive Officer

708 Quince Orchard Road, Suite 205

Gaithersburg, MD 20878

(240) 813-1260

(301) 869-9683

(Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent Forfor Service)

____________________

With a copy to:

Mary J. Mullany,

Peter Jaslow, Esquire

Ballard Spahr LLP

1735 Market Street, 51st Floor

Philadelphia, PA 19103

(215) 665-8500

____________________

Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective.



If the only securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.

[_]

If any of the securities being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.

[X]

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.

[_]

If this form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.

[_]

If this form is a registration statement filed pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.

[_]

If this form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.

[_]

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 definitions of "large“large accelerated filer," "accelerated” “accelerated filer,"” “smaller reporting company” and "smaller reporting company"“emerging growth company” in Rule 12b-2 of the Exchange Act (Check one):

Large Accelerated Filer ☐[_]Accelerated Filer ☐[_]
Non-Accelerated Filer ☐[_]Smaller Reporting Company ☒[X]
Emerging Growth Company[X]
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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for comply with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.[_]

__________________

CALCULATION OFREGISTRATION FEE

Title of Securities to be
 Registered
Amount to be
Registered(1)
Proposed
 Maximum
 Offering Price
Per Security
Proposed
Maximum
Aggregate
Offering Price
Amount of
Registration
Fee
Common stock, par value $0.01 per share— (1)$50,000,000(2)$5,035
Common Stock underlying warrant to be offered for resale by the selling stockholder (3)185,250$1.71(4)$316,777.50(4)$31.90
TOTAL  $50,316,777.50$5,066.90

Title of Securities to be RegisteredAmount to be Registered (1)Proposed Maximum Offering Price Per Share(2)Proposed Maximum Aggregate Offering PriceAmount of Registration Fee
Common stock, par value $0.01 per share450,000$1.94$873,000.00$113.32

(1)OpGen, Inc. is registering an indeterminate number of shares of its common stock to be issued and sold from time to time at indeterminate prices.  In no event will the aggregate maximum offering price of all securities issued pursuant to this registration statement exceed $50,000,000. In addition, pursuant to Rule 416 under the Securities Act of 1933, as amended (the "Securities Act"), the securities registered hereunder include such indeterminate number of additionalRepresents 450,000 shares of common stock as may be issued after the date hereof as a resultissuable upon conversion of stock splits, stock dividends or similar transactions.

(2)Estimated solely for the purpose of calculating the amountcertain convertible notes of the registration fee required pursuant to Rule 457(o) under the Securities Act, which permits the registration fee to be calculated on the basis of the maximum aggregate offering price of all securities listed.

(3)These securities are being registered hereunder for resaleRegistrant, and acquired by the selling stockholder identified herein. In addition, pursuant to Rule 416 under the Securities Act, the securities registered hereunder include such indeterminate number of securities as may be issuable with respect to the securities being registered hereunder as a result of stock splits, stock dividends or similar transactions.subscription agreement dated October 2, 2018.

(4)(2)Estimated solely for the purpose of calculating the registration fee in accordance withRule 457(c) under the Securities Act,based upon the average of the high and low sales price of our common stock as reported on the Nasdaq Capital Market on August 24, 2016.June 11, 2020.




THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a), MAY DETERMINE.


The information in this prospectus is not complete and may be changed. WeThe holders of the common stock may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to Completion, Dated August 26, 2016

June 17, 2020

PROSPECTUS

$50,000,000 Common Stock
185,250 shares

450,000 Shares of Common Stock Underlying Warrant

____________________

We may offer and sell

This prospectus relates to the resale from time to time by the selling stockholder identified in one or more offerings, up to $50,000,000 of our common stock.

Each time we sell common stock pursuant to this prospectus we will provide the specific terms of the common stock offered in a supplement to this prospectus. The prospectus supplements will also describe the specific manner in which we will offer common stock and may also supplement, update or amend information contained in this prospectus. You should read this prospectus and any related prospectus supplement carefully before you invest in our securities.
The shares of common stock being registered for the account of the Company may be sold on a delayed or continuous basis directly by us, through dealers, agents or underwriters designated from time to time, or through any combination of these methods. If any dealers, agents or underwriters are involved in the sale of the common stock in respect of which this prospectus is being delivered, we will disclose their names and the nature of our arrangements with them in any prospectus supplement.
This prospectus also relates to the offer and sale, from time to time, of up to 185,250450,000 shares (the “Shares”) of our common stock, underlying a warrant held by the "selling stockholder" named on page 5 of this prospectus or in a prospectus supplement. The warrant is exerciseable at an exercise price of $6.60par value $0.01 per share and may be exercised until May 4, 2020.
(the “Common Stock”), that are issuable upon conversion of certain convertible notes of OpGen, Inc. (the “Convertible Notes”) as further described in this prospectus.

The shares of common stock registered for the account of the selling stockholderShares may be sold from time to time by the selling stockholder directly or through one or more broker-dealers, in one or more transactions on the NASDAQNasdaq Capital Market, in the over-the-counter market, in negotiated transactions or otherwise, at prices related to the prevailing market prices or at negotiated prices, all as more fully described in the section entitled "Plan“Plan of Distribution"Distribution” beginning on page 611 of this prospectus.

We are not selling any Shares under this prospectus and will not receive any proceeds from the sale of these shares of common stock offered by the selling stockholder.  All costs and expenses incurred in connection with the registration under the Securities Actstockholder of 1933, as amended, or Securities Act, of the offering made hereby will be paid by us, other than any brokerage fees and commissions, fees and disbursements of legal counsel for the selling stockholder and stock transfer and other taxes attributable to the sale of the shares, which will be paid by the selling stockholder.


We are registering the offer and sale of these shares pursuant to certain registration rights granted to the selling stockholder.  The registration of these shares of common stock does not necessarily mean that any of the shares will be offered or sold by the selling stockholder.
such Shares.

Our common stock is traded on the NASDAQNasdaq Capital Market under the symbol "OPGN."“OPGN.” On August 25, 2016,June 16, 2020, the closing price of our common stock was $1.70$2.00 per share.

We are an ‟emerging growth company" as defined in the Jumpstart Our Business Startups Act of 2012 and, as such, are subject to certain reduced public company reporting requirements.

____________________

Investing in our securities involves a high degree of risk. You should carefully reviewBefore making an investment decision, please read the risks and uncertainties referencedinformation under the heading "RISK FACTORS""Risk Factors" beginning on page 4 in9 of this prospectus and any applicable prospectus supplement and under similar headings in other documentsany amendment or supplement to this prospectus or in any filing with the Securities and Exchange Commission that areis incorporated by reference into this prospectus.

herein.

____________________

This prospectus may not be used to offer or sell securities unless accompanied by a prospectus supplement for the securities being sold.

Neither the Securities and Exchange Commission nor any other regulatory body has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

____________________

The date of this Prospectus is           .

2020

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TABLE OF CONTENTS

 

TABLE OF CONTENTS

Page

PagePROSPECTUS SUMMARY1
PROSPECTUS SUMMARY
1
ABOUT THIS PROSPECTUS
1
7
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
2
7
RISK FACTORS
4
9
USE OF PROCEEDS
4
9
SELLING STOCKHOLDER
DETERMINATION OF OFFERING PRICE
5
9
SELLING STOCKHOLDER
9
PLAN OF DISTRIBUTION
6
11
DESCRIPTION OF CAPITAL STOCK
LEGAL MATTERS
11
13
LEGAL MATTERS
EXPERTS
15
13
EXPERTS
15
INCORPORATION BY REFERENCE
15
13
WHERE YOU CAN FIND MORE INFORMATION
13

16
i
 

PROSPECTUS SUMMARY

This summary highlights information contained elsewhere in this prospectus. This summary does not contain all of the information you should consider before investing in our securities. You should rely onlyread this entire prospectus carefully, especially the “Risk Factors” section beginning on page 9 and our financial statements and the information containedrelated notes incorporated by reference into this prospectus, before making an investment decision. As used in this prospectus, the terms “OpGen,” “the Company,” “we,” “us,” and “ours” refer to OpGen, Inc.

Business Combination Transaction with Curetis N.V.

On April 1, 2020, or the Closing Date, the Company completed its business combination transaction, or the Transaction, with Curetis N.V., a public company with limited liability under the laws of the Netherlands, or the Seller,, as contemplated by the Implementation Agreement, dated as of September 4, 2019, or the Implementation Agreement, by and among the Company, the Seller, and Crystal GmbH, a private limited liability company organized under the laws of the Federal Republic of Germany and wholly owned subsidiary of the Company, or the Purchaser. Pursuant to the Implementation Agreement, the Purchaser acquired all of the shares of Curetis GmbH, a private limited liability company organized under the laws of the Federal Republic of Germany, or Curetis, and certain other assets and liabilities of the Seller, as further described below, and paid, as the sole consideration, 2,028,208 shares of the Company’s common stock, par value $0.01 per share, or the Common Stock, to the Seller, and reserved for future issuance (a) 134,356 shares of Common Stock, in connection with its assumption of the Seller’s 2016 Stock Option Plan, as amended (the “Seller Stock Option Plan”), and the outstanding awards thereunder, and (b) 500,000 shares of Common Stock to be issued upon the conversion, if any, of certain convertible notes issued by the Seller, of which 390,891 shares have been issued as of June 12, 2020, in satisfaction of approximately $768,000 of outstanding principal and indebtedness under the assumed convertible notes. The 2,028,208 shares of Common Stock issued to the Seller represented approximately 13.8% of the outstanding Common Stock of the Company as of the Closing Date.

At the closing, the Company assumed all of the liabilities of the Seller solely and exclusively related to the acquired business, which is providing innovative solutions, through development of proprietary platforms, diagnostic content, applied bioinformatics, lab services, research services and commercial collaborations and agreements, for molecular microbiology, diagnostics designed to address the global challenge of detecting severe infectious diseases and identifying antibiotic resistances in hospitalized patient, or the Curetis business. Pursuant to the Implementation Agreement, the Company also assumed and adopted the Seller Stock Option Plan as an Amended and Restated Stock Option Plan of the Company. In connection with the foregoing, the Company assumed all awards thereunder that were outstanding as of the Closing Date and converted such awards into options to purchase shares of the Company’s Common Stock pursuant to the terms of the applicable award. In addition, the Company assumed, at the closing, all of the outstanding convertible notes issued by Seller in favor of YA II PN, LTD, or Yorkville, which is the selling stockholder under this prospectus, supplement (including in any documents incorporated by reference hereinpursuant to the previously disclosed Assignment of the Agreement for the Issuance of and Subscription to Notes Convertible into Shares, dated February 24, 2020, or therein). We have not authorized anyonethe Assignment Agreement, and entered into pursuant to provide you with any different information. We are offeringthe Implementation Agreement. In this prospectus, we refer to sell our securities, and seeking offers to buy, only in jurisdictions where offers and sales are permitted.the combined business following the consummation of the Transaction as “Newco.”

ii


OpGen Overview

OpGen is a precision medicine company harnessing the power of molecular diagnostics and informatics to help combat infectious disease. The Company is developing molecular information products and services for global healthcare settings, helping to guide clinicians with more rapid and actionable information about life threatening infections, improve patient outcomes, and decrease the spread of infections caused by multidrug-resistant microorganisms, or MDROs. Its proprietary DNA tests and informatics address the rising threat of antibiotic resistance by helping physicians and other healthcare providers optimize care decisions for patients with acute infections.

The Company’s molecular diagnostics and informatics products, product candidates and services combine its Acuitas molecular diagnostics and Acuitas Lighthouse informatics platform for use with its proprietary, curated MDRO knowledgebase. The Company is working to deliver products and services, some in development, to a global network of customers and partners.

·
PROSPECTUS SUMMARY
This summary highlights information contained elsewhere in this prospectus. This summary does not contain all of the information you should consider before investing in our securities. You should read this entire prospectus carefully, especially the "Risk Factors" section beginning on page 4 and our financial statements and the related notes incorporated by reference into this prospectus, before making an investment decision.  In this prospectus, we refer to OpGen, Inc., a Delaware corporation, as "OpGen," the "Company," "we," "us" or "our."
Overview
OpGen is harnessing the power of informatics and genomic analysis to provide complete solutions for patient, hospital and network-wide infection prevention and treatment. OpGen is developingThe Company’s Acuitas molecular information products and services to combat infectious disease in global healthcare settings, helping to guide clinicians with more rapid information about life threatening infections, improve patient outcomes, and decrease the spread of infections caused by multidrug-resistant microorganisms, or MDROs. The Company's proprietary DNA tests and bioinformatics address the rising threat of antibiotic resistance by helping physicians and healthcare providers optimize patient care decisions and protect the hospital biome through customized screening and surveillance solutions. The Company's molecular information products and services combines Acuitas® DNA tests, Acuitas Lighthouse™ bioinformatics and CLIA lab services for MDRO genetic identification, antibiotic resistance gene information and surveillance, and a proprietary data warehouse including genomic data matched with antibiotic susceptibility information for microbes and patient information from healthcare providers. The Company is working to deliver its molecular information products and services to a global network of customers and partners. The Acuitas DNAdiagnostic tests provide rapid microbial identification and antibiotic resistance gene information. These products include theits Acuitas antimicrobial resistance, or AMR, Gene Panel Urine test in development for patients at risk for complicated urinary tract infection, or cUTI, and its Acuitas AMR Gene Panel test for use with bacterial isolates in development for testing bacterial isolates, and its QuickFISH® family of and PNA FISH FDA-cleared and CE-marked diagnostic productsdiagnostics used to rapidly detect pathogens in positive blood cultures,cultures. Each of the MDROAcuitas AMR Gene TestPanel tests is available for sale for research use only, or RUO and is not for use in diagnostic procedures.
·The Company’s Acuitas Lighthouse informatics systems are cloud-based HIPAA compliant informatics offerings that combine clinical lab test results with patient and hospital information to detect, type, track,provide analytics and trend antibiotic resistant organismsactionable insights to help manage MDROs in real-timethe hospital and patient care environment. Components of the informatics systems include the Acuitas Lighthouse Knowledgebase and the Acuitas Lighthouse Software. The Acuitas Lighthouse Knowledgebase is a relational database management system and a rapidproprietary data warehouse of genomic data matched with antibiotic susceptibility information for bacterial pathogens. The Acuitas Lighthouse Software system includes the Acuitas Lighthouse Portal, a suite of web applications and dashboards, the Acuitas Lighthouse Prediction Engine, which is a data analysis software, and other supporting software components. The Acuitas Lighthouse Software can be customized and made specific to a healthcare facility or collaborator, such as a pharmaceutical company. The Acuitas Lighthouse Software is not distributed commercially for antibiotic resistance testprediction and is not for use in development.diagnostic procedures.

The Company’s operations are subject to certain risks and uncertainties. The risks include the risk that the Company will not receive 510(k) clearance for its Acuitas AMR Gene Panel test for use with bacterial isolates on a timely basis, or at all, the timing and ultimate success of future 510(k) and De Novo submissions for additional Acuitas AMR Gene Panel tests and Acuitas Lighthouse Software, rapid technology changes, the need to retain key personnel, the need to protect intellectual property and the need to raise additional capital financing on terms acceptable to the Company. The Company’s success depends, in part, on its ability to develop, obtain regulatory approval for and commercialize its proprietary technology as well as raise additional capital.


Company Information
We were incorporated under

Curetis Overview

The Curetis business develops, manufactures and commercializes innovative solutions for molecular microbiology. The Curetis business is based on two complementary business pillars:

·The Unyvero A50 is a high-plex polymerase chain reaction, or PCR, platform for comprehensive and rapid diagnosis of severe infectious diseases in hospitalized patients. The platform is based on proven, intelligently integrated technologies, allowing for the lawstesting of broad panels of pathogens and antibiotic resistance markers and the State of Delaware in January 2001. Our principal executive office is located at 708 Quince Orchard Road, Suite 205, Gaithersburg, Maryland, 20878, and our telephone number is (240) 813-1260. Our website address is www.opgen.com. We do not incorporate the information on or accessible through our website into this prospectus, and you should not consider any information on, or accessible through, our website as part of this prospectus.
ABOUT THIS PROSPECTUS
This prospectus is partprocessing of a "shelf" registration statementlarge variety of native patient samples with an intuitive workflow. The Unyvero A50 high-plex PCR platform’s advantage is the timely access to comprehensive, actionable and reliable data. Curetis’ molecular tests for different indications are commercially available in Europe, the United States, Asia and the Middle East. Curetis is also developing the Unyvero A30RQ Analyzer, which is designed to serve as a platform with low-to medium-plex capabilities that we filedit ultimately intends to commercially leverage predominantly in collaborations with the U.S. Securities and Exchange Commission, or SEC. By using a shelf registration statement, we may, from time to time, issue shares of common stock in one or more diagnostics industry partners.
·The ARES AMR database, or ARESdb, is a comprehensive database of the genetics of antimicrobial resistance, or AMR, which permits Curetis to increasingly utilize the proprietary biomarker content in its own assay and cartridge development, as well as to build an independent business in next-generation sequencing, or NGS, based offerings for AMR research and diagnostics in collaboration with partners in the life science, pharmaceutical and diagnostics industries. ARESdb is not commercially available in the United States for diagnostic use, as it has not been cleared by the FDA. In September 2019, Ares Genetics, a wholly owned subsidiary of Curetis, or Ares Genetics, signed a technology evaluation agreement with an undisclosed global IVD corporation. In the first phase of the collaboration, expected to take about 10 months, Ares Genetics expects to further enrich ARESdb with a focus on certain pathogens relevant in a first, undisclosed infectious disease indication.

Curetis GmbH’s offices and R&D laboratories are based in Holzgerlingen, near Stuttgart with its cartridge manufacturing facility in Bodelshausen also in southern Germany, in addition to subsidiaries located in San Diego, California, USA and Vienna, Austria.

Newco Overview

We anticipate that the focus of Newco will be on combined broad portfolio of products of OpGen and Curetis, which include high impact rapid diagnostics and bioinformatics to interpret AMR genetic data. The products we expect Newco to focus on are for lower respiratory infection and urinary tract or invasive joint infection:

·The Unyvero Lower Respiratory Tract, or LRT, test is the first FDA cleared test that can be used for more than 90% of infection cases of hospitalized pneumonia patients. According to the National Center for Health Statistics (2018), pneumonia is a leading cause of admissions to the hospital and is associated with substantial morbidity and mortality. The Unyvero LRT automated test detects 19 pathogens within less than five hours, with approximately two minutes of hands-on time and provides clinicians with a comprehensive overview of 10 genetic antibiotic resistance markers. We are also commercializing the Unyvero LRT test for testing bronchoalveolar lavage, or BAL, specimens of U.S. patients with lower respiratory tract infections following FDA clearance received by Curetis in December 2019. We believe the Unyvero LRT test has the ability to help address a significant, previously unmet medical need that causes over $10 billion in annual costs for the U.S. healthcare system, according to the Centers for Disease Control, or CDC.


·The Acuitas AMR Gene Panel (Urine) test is being developed for patients at risk for cUTI, and is designed to test for up to five pathogens and up to 47 antimicrobial resistance genes. When paired with the Acuitas Lighthouse software, we believe the test will be able to help improve management of the more than one million patients in the United States with cUTI. The AMR Gene Panel (Urine) is in testing for preparation of a De Novo submission with the FDA. We are pursuing a Class I designation through a De Novo Request for the test in connection with an aggregate maximum offering price of $50,000,000. Additionally,initial clinical indication to test bacterial isolates.

Newco will have an extensive offering of additional in vitro diagnostic tests including CE-marked Unyvero tests for implant and tissue infections, intra-abdominal infections, cUTI, and blood stream infections, and the QuickFISH and PNA FISH FDA-cleared and CE-marked diagnostics used to rapidly detect pathogens in positive blood cultures, which we believe have an established market position in the United States.

Newco’s combined AMR informatics offerings, once all such products are cleared for marketing, if ever, will offer important new tools to clinicians treating patients with AMR infections. OpGen has collaborated with Merck, Inc. to establish the Acuitas Lighthouse Knowledgebase, which is currently commercially available in the United States for RUO. The Acuitas Lighthouse Knowledgebase includes approximately 15,000 bacterial isolates from the Merck SMART surveillance network of 192 hospitals in 52 countries and other sources. The Curetis ARESdb is a comprehensive database of genetic and phenotypic information. ARESdb was originally designed based on the SIEMENS microbiology strain collection covering resistant pathogens over the last 30 years and its development has significantly expanded to now include approximately 55,000 sequenced isolate strains and phenotypic correlation data against over 100 antibiotics. In September 2019, Ares Genetics signed a technology evaluation agreement with an undisclosed global IVD corporation. In the first phase of the collaboration, expected to take about 10 months, Ares Genetics expects to further enrich ARESdb with a focus on certain pathogens relevant in a first, undisclosed infectious disease indication. We anticipate that Newco will utilize the proprietary biomarker content in these databases, as well as to build an independent business in NGS and AI based offerings for AMR research and diagnostics in collaboration with partners in the life science, pharmaceutical and diagnostics industries.

The Unyvero A50 tests for up to 130 diagnostic targets (pathogens and resistance genes) in under five hours with approximately two minutes of hands-on time. The system was first CE Marked in 2012 and was FDA cleared in 2018 along with the LRT test through De Novo  process. As of December 31, 2019, there is an installed base of 173 Unyvero A50 Analyzers globally. The Unyvero A30 RQ is a new device designed to address the low to mid-plex testing market for 5-30 DNA targets and to provide results in 45 to 90 minutes with 2-5 minutes of hands on time. The Unyvero A30 has a small laboratory footprint and has an attractive cost of goods profile. Curetis has been following a partnering strategy for the Unyvero A30.

Newco has extensive partner and distribution relationships to help accelerate the establishment of a global infectious disease diagnostic testing and informatics business. Partners will include A. Menarini Diagnostics for pan-European distribution to currently 11 countries; MGI/BGI for NGS-based molecular microbiology applications in China; and Beijing Clear Biotech Co. Ltd. for Unyvero A50 product distribution in China. Newco has a network currently consisting of 18 distributors covering 43 countries.


Newco will continue to develop and seek FDA and other regulatory clearances or approvals, as applicable, for the Acuitas AMR Gene Panel (Urine) diagnostic test and the Acuitas Lighthouse Software products. Newco will continue to offer the Acuitas AMR Gene Panel (Isolates) and Acuitas Lighthouse Software as well as the Unyvero UTI Panel as RUO products to hospitals, public health departments, clinical laboratories, pharmaceutical companies and contract research organizations, or CROs.

Yorkville Financing

As discussed above, at the closing of the Transaction pursuant to the Assignment Agreement, the Company assumed all of the outstanding convertible notes, or the Convertible Notes, issued by Curetis in favor of Yorkville, under that certain Agreement for the Issuance of and Subscription to Notes Convertible into Shares and Share Subscription Warrants, dated October 2, 2018, by and between Curetis and Yorkville. Pursuant to the Assignment Agreement, upon assumption of the Convertible Notes by the Company, the Convertible Notes ceased to be convertible into shares of Curetis and instead became convertible into shares of Common Stock of the Company. Under the Assignment Agreement, an amount of 500,000 shares of Common Stock that comprise a portion of the consideration payable by the Company under the Implementation Agreement were reserved for issuance upon conversion of the Convertible Notes. The Company also agreed to register for sale up to 1,000,000 shares of its Common Stock issuable upon conversion of the Convertible Notes. In furtherance of such agreement, this prospectus and the registration statement of which it is a part relates to the sale of up to 450,000 shares of Common Stock issuable upon conversion of the Convertible Notes.

Each Convertible Note has a maturity of 12 months from its date of issuance. The Company, has the right to extend such maturity by an additional 12-month period, while paying a cash fee equal to 5% of the principal amount of the relevant Convertible Notes. Subject to certain limitations, the maturity period can be extended up to four times.

The Convertible Notes do not accrue interest, except in the case of an event of default under the Convertible Notes, in which case the Convertible Notes shall accrue default interest at a rate of 15% per annum until the earlier of the date that the event of default is cured or the date on which the Convertible Notes have been fully converted or redeemed.

The Convertible Notes may be converted at any time until they are fully redeemed. Upon conversion of the Convertible Notes, the number of shares of Common Stock will be calculated by dividing the aggregate principal amount of the relevant Convertible Notes by 93% of the lowest daily volume weighted average price of the Company common stock on the Nasdaq Capital Market over the 10 trading days prior to the conversion date.

The Convertible Notes may be freely transferred, except to retail investors, and subject to compliance with applicable securities laws. The Convertible Notes contain anti-dilution protection, which protects the holder of the security from equity dilution resulting from later issues of shares at a lower price or value than that provided for in the security. The protection in the Convertible Notes takes the form of tying the conversion price of the Convertible Notes to the prevailing market price of the underlying shares of Common Stock so that changes to the share price due to share issuances, share splits or other potentially dilutive events will result in a corresponding change in the number of shares of Common Stock issuable upon conversion of a Convertible Note.

Company Information

OpGen was incorporated in Delaware in 2001. On July 14, 2015, OpGen completed the Merger with AdvanDx. Pursuant to the terms of a Merger Agreement, Velox Acquisition Corp., OpGen’s wholly-owned subsidiary formed for the express purpose of effecting the Merger, merged with and into AdvanDx with AdvanDx surviving as OpGen’s wholly-owned subsidiary. On April 1, 2020, the Company completed the Transaction, pursuant to which it acquired Curetis. The Company’s headquarters and principal operations are in Gaithersburg, Maryland, and our telephone number is (240) 813-1260. Our website address is www.opgen.com. We do not incorporate the information on or accessible through our website into this prospectus, and you should not consider any information on, or that can be accessed through, our website as part of this prospectus.


THE OFFERING

Common stock offered by the selling stockholder identified herein may offer and sell upUp to 185,250450,000 shares of our common stock underlying a warrant, in one or more offerings. The warrant is exerciseable at an exercise price
Terms of $6.60 per share and may be exercised until May 4, 2020.  Each time we sell any of our common stock, we will provide a prospectus supplement that will contain more specific information about the offeringThe selling stockholder will determine when and the terms ofhow it will sell the common stock being sold. We may also add, update or change in the prospectus supplement any of the information contained in this prospectus or the documents incorporated by reference.

This prospectus provides you with a general description of the Company and our common stock. For further information about our business and our securities, you should refer to the registration statement and the reports incorporated by referenceoffered in this prospectus, as described in "Where You Can Find More Information."
You should rely only on the information contained in this prospectus and in any prospectus supplement (including in any documents incorporated by reference herein or therein). We have not authorized anyone to provide you with any different information. We are offering to sell our common stock, and seeking offers to buy, only in jurisdictions where offers and sales are permitted.
You should assume that the information in this prospectus or any prospectus supplement is accurate only as"Plan of the date of this prospectus or any prospectus supplement and that any information we have incorporated herein by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus, any prospectus supplement or any sale of any security.
We further note that the representations, warranties and covenants made by us in any agreement that is filed as an exhibit to any document that is incorporated by reference in the accompanying prospectus were made solely for the benefit of the parties to such agreement, including, in some cases, for the purpose of allocating risk among the parties to such agreements, and should not be deemed to be a representation, warranty or covenant to you.  Moreover, such representations, warranties or covenants were accurate only as of the date when made.  Accordingly, such representations, warranties and covenants should not be relied on as accurately representing the current state of our affairs.
This prospectus may not be used to consummate sales of our securities, unless it is accompanied by a prospectus supplement. To the extent there are inconsistencies between any prospectus supplement, this prospectus and any documents incorporated by reference, the document with the most recent date will control.
SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
This prospectus and certain information incorporated herein by reference contain forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act. All statements, other than statements of historical facts contained herein, including statements regarding our future results of operations and financial position, strategy and plans, and our expectations for future operations, are forward-looking statements. The words "believe,Distribution." "may," "will," "estimate," "continue," "anticipate," "design," "intend," "expect" or the negative version of these words and similar expressions are intended to identify forward-looking statements.
We have based these forward-looking statements on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, strategy, short- and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including those referenced below under the heading "Risk Factors." In light of these risks, uncertainties and assumptions, the forward-looking events and circumstances included herein may not occur, and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Forward-looking statements include, but are not limited to, statements about:
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the commercialization of our current products, including our QuickFISH® and PNA FISH diagnostic products for infectious diseases, our Acuitas® MDRO test services and our Acuitas Lighthouse™ bioinformatics services;
  
Use of proceedsWe will not receive any proceeds from the sale of the shares of common stock covered by this prospectus.
Risk factors

See "Risk Factors" beginning on page 9, for a discussion of factors you should carefully consider before deciding to invest in our common stock.

Nasdaq Capital Market symbolOur Common Stock is listed on the Nasdaq Capital Market under the symbol “OPGN.” On June 16, 2020 the last reported sale price of our common stock was $2.00 per share.


ABOUT THIS PROSPECTUS

This prospectus is part of a resale registration statement that we filed with the U.S. Securities and Exchange Commission, or SEC. By using a resale registration statement, the selling stockholder may sell from time to time in one or more offerings the Common Stock described in this prospectus.

This prospectus provides you with a general description of the Company and our securities. For further information about our business and our securities, you should refer to the registration statement and the reports incorporated by reference in this prospectus, as described in “Where You Can Find More Information.”

We have not authorized anyone to provide you with information other than the information that we have provided or incorporated by reference in this prospectus and your reliance on any unauthorized information or representation is at your own risk. This prospectus may be used only in jurisdictions where offers and sales of these securities are permitted. You should assume that the information appearing in this prospectus is accurate only as of the date of this prospectus and that any information we have incorporated by reference is accurate only as of the date of the document incorporated by reference, regardless of the time of delivery of this prospectus, or any sale of our common stock. Our business, financial condition and results of operations may have changed since those dates.

We own various U.S. federal trademark registrations and applications and unregistered trademarks and servicemarks, including OpGen®, Curetis®, Unyvero®, ARES® and ARES GENETICS®, Acuitas®, Acuitas Lighthouse®, AdvanDx®, QuickFISH®, and PNA FISH®. All other trademarks, servicemarks or trade names referred to in this prospectus are the property of their respective owners. Solely for convenience, the trademarks and trade names in this prospectus are sometimes referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert, to the fullest extent under applicable law, their rights thereto. We do not intend the use or display of other companies’ trademarks and trade names to imply a relationship with, or endorsement or sponsorship of us by, any other companies, products or services.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements, other than statements of historical fact, included or incorporated in this prospectus regarding our strategy, future operations, collaborations, intellectual property, cash resources, financial position, future revenues, projected costs, prospects, plans, and objectives of management are forward-looking statements. The words “believes,” “anticipates,” “estimates,” “plans,” “expects,” “intends,” “may,” “could,” “should,” “potential,” “likely,” “projects,” “continue,” “will,” and “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words.

We have based these forward-looking statements on our current expectations and projections about future events and trends that we believe may affect our financial condition, results of operations, strategy, short- and long-term business operations and objectives, and financial needs. These forward-looking statements are subject to a number of risks, uncertainties and assumptions, including those described under the heading “Risk Factors.” In light of these risks, uncertainties and assumptions, the forward-looking events and circumstances included herein may not occur, and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Forward-looking statements include, but are not limited to, statements about:


·our ability to integrate the OpGen, Curetis, and Ares Genetics businesses;
·our liquidity and working capital requirements, including our cash requirements over the next 12 monthsmonths;
·our ability to maintain compliance with the ongoing listing requirements for the Nasdaq Capital Market;
·receipt of regulatory clearance of our submitted 510(k) pre-market submission for our Acuitas AMR Gene Panel test for use with bacterial isolates;
·the impact of the coronavirus pandemic on our business and beyond;operations;
·the completion of our development efforts for the Acuitas AMR Gene Panel Urine test and Acuitas Lighthouse Software, Unyvero IJI and SHR panels, Unyvero A30RQ platform and Aresdb and the timing of regulatory submissions;
 ●·our ability to sustain or grow our customer base for our current research use only and rapid pathogen ID testing products;
·regulations and changes in laws or regulations applicable to our business, including regulation by the FDA;
·anticipated trends and challenges in our business and the competition that we face;
 ●·the execution of our business plan and our growth strategy;
 ●·our expectations regarding the size of and growth in potential markets;
 ●·our opportunity to successfully enter into new collaborative or strategic agreements;
 ●changes in laws or regulations applicable to our business, including potential regulation by the FDA;
 ●our ability to develop and commercialize new products and the timing of commercialization;
 ●integration of the operations of AdvanDx, Inc. acquired by merger on July 14, 2015;
 ●·compliance with the U.S. and international regulations applicable to our business; and
 ●·our expectations regarding future revenue and expenses.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance or achievements. In addition, neither we nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements. These risks should not be construed as exhaustive and should be read in conjunction with our other disclosures, including but not limited to the risks described under the heading “Risk Factors.” Other risks may be described from time to time in our filings made under the securities laws. New risks emerge from time to time. It is not possible for our management to predict all risks. All forward-looking statements in this prospectus speak only as of the date made and are based on our current beliefs and expectations. We undertake no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, level of activity, performance or achievements. In addition, neither we nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements. Any forward-looking statement made by us in this prospectus speaks only as of the date on which it is made. We disclaim any duty to update any of these forward looking statements after the date of this prospectus to confirm these statements to actual results or revised expectations.
Other risks may be described from time to time in our filings made under the securities laws. New risks emerge from time to time. It is not possible for our management to predict all risks. All forward-looking statements in this prospectus speak only as of the date made and are based on our current beliefs and expectations. We undertake no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

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RISK FACTORS

Investing in our securities involves substantial risks. In addition to other information contained in this prospectus and in any accompanying prospectus supplement, before investing in our securities, you should carefully consider the risks described under the heading "Risk Factors"“Risk Factors” in our most recent Annual Report on Form 10-K or in our most recentand Quarterly Report on Form 10-Q as they may be amended,and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K and in any other documents incorporated by reference into this prospectus, as updated by our future filings. These risks are not the only ones faced by us. Additional risks not known or that are deemed immaterial could also materially and adversely affect our financial condition, results of operations, our products, business and prospects. Any of these risks might cause you to lose all or a part of your investment.

USE OF PROCEEDS

Unless otherwise indicated in the applicable prospectus supplement, we intend to use the net proceeds from the sale of common stock under this prospectus, together with our existing cash resources, for working capital and other general corporate purposes. We may also use a portion of the net proceeds that we receive to acquire or invest in complementary businesses, products, services, technologies, or other assets. At this time, we have not determined the specific uses of any offering proceeds, or the amounts we plan to spend on any particular use or the timing of such expenditures, which may vary significantly depending on various factors, such as our research and development activities, regulatory approvals, competition, marketing and sales, and the market acceptance of any products introduced by us or our partners. Pending application of the net proceeds from any particular offering, we intend to invest such proceeds in short-term, interest-bearing, investment-grade securities. 

We will not receive any of the proceeds from the sale or other disposition of the Shares held by the selling stockholder pursuant to this prospectus.

DETERMINATION OF OFFERING PRICE

The prices at which the Shares may actually be sold will be determined by the prevailing public market price for shares of common stock, by negotiations between the selling stockholder.

Each time we issue common stock, we will provide a prospectus supplement that will contain information about how we intend to use the proceeds from each such offering.
We cannot guarantee that we will receive any proceeds in connection with any offering hereunder because we may choose not to issue any of the common stock covered by this prospectus.
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SELLING STOCKHOLDER
On May 8, 2015, the selling stockholder acquired a warrant, or the Underwriter Warrant, to purchase 185,250 sharesstockholders and buyers of our common stock in private transactions or as partotherwise described in “Plan of Distribution.”

SELLING STOCKHOLDER

We are registering the resale of up to 450,000 shares of Common Stock issuable upon conversion of the consideration paid toConvertible Notes held by Yorkville, the selling stockholder in this prospectus, to permit it, or its capacity as the underwriter of our initial public offering.  The Underwriter Warrant is exerciseable at an exercise price of $6.60 per share andpermitted transferees or other successors-in-interest that may be exercised until May 4, 2020.

identified in a supplement to this prospectus or, if required, a post-effective amendment to the registration statement of which this prospectus is a part, to resell or otherwise dispose of such shares in the manner contemplated under the section entitled "Plan of Distribution" in this prospectus (as may be supplemented and amended).

The selling stockholder may sell some, all or none of the Shares. We do not know how long the selling stockholder will hold the Shares before selling them, and we currently have no agreements, arrangements or understandings with the selling stockholder regarding the sale or other disposition of any of the Shares. The Shares covered hereby may be offered from time to time by the selling stockholder. As a result, we cannot estimate the number of Shares the selling stockholder will beneficially own after termination of sales under this prospectus. In addition, the selling stockholders may have sold, transferred or otherwise disposed of all or a portion of its Shares since the date on which it provided information for this table.

The following table sets forth information as of August 15, 2016June 16, 2020, and includes the number of shares of our common stockCommon Stock beneficially owned by the selling stockholder prior to the offering, the number of shares of common stockCommon Stock offered by the selling stockholder, and the number of shares of common stockCommon Stock that will be owned by the selling stockholder upon completion of the offering or offerings pursuant to this prospectus, assuming that the selling stockholder sells all of the shares of common stock offered hereby.Shares. Only the selling stockholder listed below or itstheir transferees, pledgees, donees, assignees, distributees, successors and others who later come to hold any of thesuch selling stockholder'sstockholder’s interest may offer and sell the common stockShares pursuant to this prospectus and any accompanying prospectus supplement.prospectus. The selling stockholder may offer the shares listed onin the table below for sale pursuant to this prospectus and any accompanying prospectus supplement from time to time. Accordingly, no estimate can be given as


  

Beneficial Ownership

Prior to this Offering

 

Shares Being

Offered

 

Beneficial Ownership

After this Offering

Name of Selling Stockholder Number Percent 

(1)

 Number Percent
YA II PN, Ltd.  0   *   450,000   0   * 

____________________

* Represents beneficial ownership of less than 1%.

(1)The shares being offered consist solely of shares of Common Stock underlying the Convertible Notes.

Relationship with Selling Stockholder

As discussed in greater detail above under the section "Prospectus Summary—Yorkville Financing," on February 24, 2020, we entered into the Assignment Agreement with the selling stockholder to assume the Convertible Notes, and agreed with the selling stockholder to file a registration statement to enable the resale of the shares of common stock thatcovered by this prospectus.

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PLAN OF DISTRIBUTION

We are registering the Shares issued to the selling stockholder to permit the resale of these Shares by the selling stockholder from time to time after the date of this prospectus. We will not receive any of the proceeds from the sale by the selling stockholder of the Shares.

Yorkville, the selling stockholder, may sell all or a portion of the Shares beneficially owned by them and offered hereby from time to time directly or through one or more underwriters, broker-dealers or agents. If the Shares are sold through underwriters or broker-dealers, the selling stockholder will hold upon consummation of any such sales. Beneficial ownership is determined in accordance with the rules of the SEC. There are no material relationships between the selling stockholder and us other than as disclosed below. 

 
 
Beneficial Ownership
Prior to this Offering
Shares Being
Offered for
Sale
 
 
Beneficial Ownership
After this Offering
Name of Selling StockholderNumberPercentNumberNumberPercent
Maxim Partners LLC185,250*%185,250— 
      
*Hold less than one percent (1%).
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PLAN OF DISTRIBUTION
Primary Offerings by the Company
We may sell shares of our common stock registered hereunder:
·through underwriters;
·through dealers;
·through agents;
·directly to purchasers; or
·through a combination of any of these methods or any other method permitted by law.
In addition, we may issue the securities as a dividendbe responsible for underwriting discounts or distributioncommissions or in a subscription rights offering to our existing security holders.
We may directly solicit offers to purchase common stock, or agentsagent's commissions. The Shares may be designated to solicit such offers. In the prospectus supplement relating to such offering, we will name any agent that could be viewed as an underwriter under the Securities Act and describe any commissions that we must pay to any such agent. Any such agent will be acting on a best efforts basis for the period of its appointment or, if indicated in the applicable prospectus supplement, on a firm commitment basis. This prospectus may be used in connection with any offering of our common stock through any of these methods or other methods described in the applicable prospectus supplement.
The distribution of the common stock may be effected from time to time in one or more transactions:
·at a fixed price, or prices, which may be changed from time to time;
·at market prices prevailing at the time of sale;
·at prices related to such prevailing market prices; or
·at negotiated prices.
Each prospectus supplement will describe the method of distribution of the common stock and any applicable restrictions.
The prospectus supplement with respect to common stock of a particular series will describe the terms of the offering of the securities, including the following:
·the name of the agent or any underwriters, if any;
·the public offering or purchase price;
·any discounts and commissions to be allowed or paid to the agent or underwriters;
·all other items constituting underwriting compensation;
·any discounts and commissions to be allowed or paid to dealers; and
·any exchanges on which the securities will be listed.
If any underwriters or agents are used in the sale of common stock in respect of which this prospectus is delivered, we will enter into an underwriting agreement, sales agreement or other agreement with them at the time of sale to them, and we will set forth in the prospectus supplement relating to such offering the names of the underwriters or agents and the terms of the related agreement with them.
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In connection with the offering of common stock, we may grant to the underwriters an option to purchase additional securities with an additional underwriting commission, as may be set forth in the accompanying prospectus supplement. If we grant any such option, the terms of such option will be set forth in the prospectus supplement for such securities.
If a dealer is used in the sale of common stock in respect of which the prospectus is delivered, we will sell such common stock to the dealer, as principal. The dealer, who may be deemed to be an "underwriter" as that term is defined in the Securities Act, may then resell such securities to the public at varying prices to be determined by such dealer at the time of resale.
If we offer common stock in a subscription rights offering to our existing security holders, we may enter into a standby underwriting agreement with dealers, acting as standby underwriters. We may pay the standby underwriters a commitment fee for the securities they commit to purchase on a standby basis. If we do not enter into a standby underwriting arrangement, we may retain a dealer-manager to manage a subscription rights offering for us.
Agents, underwriters, dealers and other persons may be entitled under agreements which they may enter into with us to indemnification by us against certain civil liabilities, including liabilities under the Securities Act, and may be customers of, engage in transactions with or perform services for us in the ordinary course of business.
Certain agents, underwriters and dealers, and their associates and affiliates, may be customers of, have borrowing relationships with, engage in other transactions with, or perform services, including investment banking services, for us or one or more of our respective affiliates in the ordinary course of business.
In order to facilitate the offering of the common stock, any underwriters may engage in  transactions that stabilize, maintain or otherwise affect the price of the common stock or any other securities the prices of which may be used to determine payments on such common stock. Specifically, any underwriters may overallot in connection with the offering, creating a short position for their own accounts. In addition, to cover overallotments or to stabilize the price of the common stock or of any such other securities, the underwriters may bid for, and purchase, the common stock or any such other securities in the open market. Finally, in any offering of the common stock through a syndicate of underwriters, the underwriting syndicate may reclaim selling concessions allowed to an underwriter or a dealer for distributing the common stock in the offering if the syndicate repurchases previously distributed common stock in transactions to cover syndicate short positions, in stabilization transactions or otherwise. Any of these activities may stabilize or maintain the market price of the common stock above independent market levels. Any such underwriters are not required to engage in these activities and may end any of these activities at any time.
We may engage in "at the market offerings" within the meaning of Rule 415(a)(4) under the Securities Act, to or through a market maker or into an existing trading market on an exchange or otherwise. In addition, we may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement so indicates, in connection with those derivatives, the third parties may sell common stock covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use common stock pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use common stock received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be named in the applicable prospectus supplement (or a post-effective amendment). In addition, we may otherwise loan or pledge common stock to a financial institution or other third party that in turn may sell the common stock short using this prospectus and an applicable prospectus supplement. Such financial institution or other third party may transfer its economic short position to investors in our common stock or in connection with a concurrent offering of other securities.
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The specific terms of any lock-up provisions in respect of any given offering will be described in the applicable prospectus supplement.
The underwriters, dealers and agents may engage in transactions with us, or perform services for us, in the ordinary course of business for which they receive compensation.
The anticipated date of delivery of offered common stock will be set forth in the applicable prospectus supplement relating to each offer.
We will bear all costs, expenses and fees in connection with the registration of the common stock, as well as the expense of all commissions and discounts, if any, attributable to sales of the securities by us.
Offerings by the Selling Stockholder
The selling stockholder and any transferees, pledgees, donees, assignees, distributees or other successors in interest to a selling stockholder may, from time to time, sell, transfer or otherwise dispose of any or all of their shares of our common stock covered by this prospectussold on the NASDAQNasdaq Capital Market or any other stock exchange, market or trading facility on which the sharesShares are traded or in private transactions. These dispositions may be at fixed prices, at prevailing market prices at the time of sale, at prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices. AThese sales may be effected in transactions, which may involve crosses or block transactions. The selling stockholder may use any one or more of the following methods when disposing ofselling shares:

·ordinary brokerage transactions and transactions in which the broker-dealer solicits purchasers;
·block trades in which the broker-dealer will attempt to sell the sharesShares as agent but may position and resell a portion of the block as principal to facilitate the transaction;
·purchases by a broker-dealer as principal and resale by the broker-dealer for its account;
·an exchange distribution in accordance with the rules of the applicable exchange;
·privately negotiated transactions;
·settlement of short sales entered into after the effective date of the registration statement of which this prospectus is a part;
·broker-dealers may agree with the selling stockholder to sell a specified number of such sharesShares at a stipulated price per share;
·through the writing or settlement of options or other hedging transactions, whether through an options exchange or otherwise;
·a combination of any such methods of sale; or
·any other method permitted pursuant to applicable law (including underwritten transactions).
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The selling stockholder may also sell shares under Rule 144 under the Securities Act, if available, rather than under this prospectus.

The selling stockholder has informed us that they do not have any agreement or understanding, directly or indirectly, with any person to distribute the shares covered under this prospectus. If the selling stockholder notifies us that a material arrangement has been entered into with a broker-dealer for the sale of some or all of the Shares through a block trade, secondary distribution or a purchase by a broker or dealer, we may be required to file a prospectus supplement pursuant to the applicable rules promulgated under the Securities Act.

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Broker-dealers, underwriters and agents engaged by the selling stockholder may arrange for other brokers dealers,broker-dealers, underwriters or agents to participate in sales. Broker-dealers, underwriters or agents may receive commissions, discounts or concessions from the selling stockholder (or, if any broker-dealer acts as agent for the purchaserpurchase of shares,Shares, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with FINRA rules.

In connection with the sale of the common stock or interests therein,Shares, the selling stockholder may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the common stockShares in the course of hedging the positions they assume. The selling stockholder may also sell shares of the common stock shortShares and deliver these securities to close out their short positions, or loan or pledge the common stock to broker-dealers that in turn may sell these securities. The selling stockholder may also enter into option or other transactions with broker-dealers or other financial institutions or the creation of one (1) or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).

The selling stockholder and any broker-dealers, underwriters or agents that are involved in selling the sharesShares may be deemed to be "underwriters"“underwriters” within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers, underwriters or agents and any profit on the resale of the sharesShares purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act.

If the selling stockholder qualifies as an “underwriter,” it will be subject to the prospectus delivery requirements of Section 5(b)(2) of the Securities Act.

All costs and expenses incurred in connection with the registration under the Securities Act of the offering made hereby will be paid by us, other than any brokerage fees and commissions, fees and disbursements of legal counsel for the selling stockholder and stock transfer and other taxes attributable to the sale of the shares,Shares, which will be paid by the applicable selling stockholder.

Because the selling stockholder may be deemed to be "underwriters"an “underwriter” within the meaning of the Securities Act, they will be subject to the prospectus delivery requirements of the Securities Act including Rule 172 thereunder. In addition, any securities covered by this prospectus which qualify for sale pursuant to Rule 144 under the Securities Act may be sold under Rule 144 rather than under this prospectus.

To the extent required, the shares of our common stockShares to be sold; the names of the selling stockholder; the respective purchase prices and public offering prices; the names of any agents, dealers or underwriters; and any applicable commissions or discounts with respect to a particular offer will be set forth in an accompanying prospectus supplement or, if appropriate, a post-effective amendment to the registration statement that includes this prospectus. The resale shares will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale shares may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

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Under applicable rules and regulations under the Exchange Act, any person engaged in the distribution of the resale shares may not simultaneously engage in market making activities with respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling stockholder will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of shares of our common stock by the selling stockholder or any other person. We will make copies of this prospectus available to the selling stockholder and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act).

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DESCRIPTION OF CAPITAL STOCK
Our authorized capital stock consists of 200,000,000 shares of common stock, par value $0.01 per share, and 10,000,000 shares of preferred stock, par value $0.01 per share, of which 7,690,572 shares are available for issuance. The following is a summary of the rights of our common and preferred stock and some of the provisions of our amended and restated certificate of incorporation and amended and restated bylaws and the Delaware General Corporation Law. Because it is only a summary, it does not contain all of the information that may be important to you. Such summary is subject to and qualified in its entirety by our amended and restated certificate of incorporation and our amended and restated bylaws, a copy of each of which has been incorporated as an exhibit to the registration statement of which this prospectus forms a part.
Common Stock
Of the authorized common stock, as of August 15, 2016, there were 21,667,739 shares outstanding. As of August 15, 2016, there were 14,182,950 shares of our common stock reserved for the exercise of outstanding stock options, warrants and restricted stock units. There were approximately 71 record holders as of August 15, 2016. The holders of our common stock are entitled to one vote for each share held on all matters submitted to a vote of the stockholders. The holders of our common stock do not have any cumulative voting rights. Holders of our common stock are entitled to receive ratably any dividends declared by the board of directors out of funds legally available for that purpose, subject to any preferential dividend rights of any outstanding preferred stock. Our common stock has no preemptive rights, conversion rights or other subscription rights or redemption or sinking fund provisions.
In the event of our liquidation, dissolution or winding up, holders of our common stock will be entitled to share ratably in all assets remaining after payment of all debts and other liabilities and any liquidation preference of any outstanding preferred stock.
Preferred Stock
Series A Convertible Preferred Stock
Of the authorized preferred stock, the Company issued 2,309,428 shares of Series A Convertible Preferred Stock. As of August 10, 2016, no shares of the Series A Convertible Preferred Stock were outstanding. The holder of the Series A Convertible Preferred Stock converted all 2,309,428 shares of Series A Convertible Preferred Stock into 2,309,428 shares of common stock. All such converted shares of Series A Convertible Preferred Stock were canceled and will not be reissued.
Additional Series of Preferred Stock
Our board of directors has the authority, without further action by our stockholders, to issue from time to time 7,690,572 shares of preferred stock in one or more series. Our board of directors will have the authority to establish the number of shares to be included in each series and fix the powers, preferences and rights of the shares of each wholly unissued series and any of its qualifications, limitations or restrictions. Our board of directors will also be able to increase or decrease the number of shares of any series, but not below the number of shares of that series then outstanding, without any further vote or action by the stockholders.
The issuance of preferred stock could decrease the amount of earnings and assets available for distribution to the holders of common stock or adversely affect the rights and powers, including voting rights, of the holders of common stock. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in control of our Company, which could depress the market price of our common stock. We have no current plans to issue any additional shares of preferred stock.
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Underwriter Warrant
On May 8, 2015, the selling stockholder acquired the Underwriter Warrant to purchase 185,250 shares of our common stock as part of the consideration paid to the selling stockholder in its capacity as the underwriter of our initial public offering.  The Underwriter Warrant is exerciseable at an exercise price of $6.60 per share and may be exercised until May 4, 2020.  The exercise price and the number of shares of common stock underlying the Underwriter Warrant will be adjusted to account for the subdivision or combination by the Company of outstanding shares of common stock. The Warrants may be exercised pursuant to a cashless exercise, but only if a registration statement covering the resale of the Warrant Shares that are the subject of an exercise notice is not available for the resale of such Warrant Shares.
Anti-Takeover Effects of Our Certificate of Incorporation, Bylaws and Delaware Law
Our certificate of incorporation and bylaws include a number of provisions that may have the effect of delaying, deferring or preventing another party from acquiring control of us and encouraging persons considering unsolicited tender offers or other unilateral takeover proposals to negotiate with our board of directors rather than pursue non-negotiated takeover attempts. These provisions include the items described below.
Meetings of Stockholders
Our certificate of incorporation and bylaws provide that only the Chair of the Board, the Chief Executive Officer or a majority of the members of our board of directors then in office may call special meetings of stockholders and only those matters set forth in the notice of the special meeting may be considered or acted upon at a special meeting of stockholders. Our bylaws limit the business that may be conducted at an annual meeting of stockholders to those matters properly brought before the meeting.
Advance Notice Requirements
Our bylaws establish advance notice procedures with regard to stockholder proposals relating to the nomination of candidates for election as directors or new business to be brought before meetings of our stockholders. These procedures provide that notice of stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the action is to be taken. Generally, to be timely, notice must be received at our principal executive offices not less than 90 days nor more than 120 days prior to the first anniversary date of the annual meeting for the preceding year. Our bylaws specify the requirements as to form and content of all stockholders' notices. These requirements may preclude stockholders from bringing matters before the stockholders at an annual or special meeting.
Amendment to Certificate of Incorporation and Bylaws
Any amendment of our certificate of incorporation must first be approved by a majority of our board of directors, and if required by law or our certificate of incorporation, must thereafter be approved by a majority of the outstanding shares entitled to vote on the amendment, except that the amendment of the provisions relating to stockholder action, board composition, limitation of liability and the amendment of our certificate of incorporation must be approved by not less than 66 2/3% of the outstanding shares entitled to vote on the amendment, and not less than 66 2/3% of the outstanding shares of each class entitled to vote thereon as a class. Our bylaws may be amended by the affirmative vote of a majority of the directors then in office, subject to any limitations set forth in the bylaws; and may also be amended by the affirmative vote of at least 66 2/3% of the outstanding shares entitled to vote on the amendment, or, if our board of directors recommends that the stockholders approve the amendment, by the affirmative vote of the majority of the outstanding shares entitled to vote on the amendment, in each case voting together as a single class.
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Undesignated Preferred Stock
Our board of directors has the authority, without further action by our stockholders, to issue from time to time 7,690,572 shares of preferred stock in one or more series. The existence of authorized but unissued shares of preferred stock may enable our board of directors to discourage an attempt to obtain control of us by means of a merger, tender offer, proxy contest or otherwise. For example, if in the due exercise of its fiduciary obligations, our board of directors were to determine that a takeover proposal is not in the best interests of our stockholders, our board of directors could cause shares of preferred stock to be issued without stockholder approval in one or more private offerings or other transactions that might dilute the voting or other rights of the proposed acquirer or insurgent stockholder or stockholder group. In this regard, our certificate of incorporation grants our board of directors broad power to establish the rights and preferences of authorized and unissued shares of preferred stock. The issuance of shares of preferred stock could decrease the amount of earnings and assets available for distribution to holders of shares of common stock. The issuance may also adversely affect the rights and powers, including voting rights, of these holders and may have the effect of delaying, deterring or preventing a change in control of us.
Exclusive Jurisdiction for Certain Actions
Our certificate of incorporation provides that, once our common stock is a "covered security,"  unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall be the sole and exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (iii) any action asserting a claim arising pursuant to any provision of the Delaware General Corporation Law, our certificate of incorporation or our bylaws, or (iv) any action asserting a claim against us governed by the internal affairs doctrine. Although we believe this provision benefits us by providing increased consistency in the application of Delaware law in the types of lawsuits to which it applies, the provision may have the effect of discouraging lawsuits against our directors and officers. The enforceability of similar exclusive forum provisions in other companies' certificates of incorporation has been challenged in legal proceedings, and it is possible that a court could rule that this provision in our certificate of incorporation is inapplicable or unenforceable.
Section 203 of the Delaware General Corporation Law
We are subject to the provisions of Section 203 of the Delaware General Corporation Law. In general, Section 203 prohibits a publicly held Delaware corporation from engaging in a "business combination" with an "interested stockholder" for a three-year period following the time that this stockholder becomes an interested stockholder, unless the business combination is approved in a prescribed manner. Under Section 203, a business combination between a corporation and an interested stockholder is prohibited unless it satisfies one of the following conditions:
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·before the stockholder became interested, our board of directors approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder;12 
·upon consummation of the transaction which resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding, shares owned by persons who are directors and also officers, and employee stock plans, in some instances, but not the outstanding voting stock owned by the interested stockholder; or
·at or after the time the stockholder became interested, the business combination was approved by our board of directors and authorized at an annual or special meeting of the stockholders by the affirmative vote of at least two-thirds of the outstanding voting stock which is not owned by the interested stockholder.
Section 203 defines a business combination to include:
·any merger or consolidation involving the corporation and the interested stockholder;
·any sale, transfer, lease, pledge or other disposition involving the interested stockholder of 10% or more of the assets of the corporation;
·subject to exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;
·subject to exceptions, any transaction involving the corporation that has the effect of increasing the proportionate share of the stock of any class or series of the corporation beneficially owned by the interested stockholder; and
·the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges or other financial benefits provided by or through the corporation.
In general, Section 203 defines an interested stockholder as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation and any entity or person affiliated with or controlling or controlled by the entity or person.
Transfer Agent and Registrar
The transfer agent for our common stock is Philadelphia Stock Transfer, Inc.
Exchange Listing
The shares of our common stock are currently listed on the NASDAQ Capital Market under the symbol "OPGN."
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LEGAL MATTERS

Certain legal matters with respect to the securities offered hereby have been passed upon by Ballard Spahr LLP.

EXPERTS

The consolidated financial statements of OpGen, Inc. and its subsidiaries as of December 31, 20152019 and 20142018, and for the years then ended, included in our Annual Report on Form 10-K for the year ended December 31, 2015, andhave been incorporated by reference herein have been auditedin reliance upon the report, also incorporated by reference herein, of CohnReznick LLP, an independent registered public accounting firm, as set forth in their report, which includes an explanatory paragraph related to OpGen, Inc.'s ability to continue as a going concern, incorporated herein by reference, in relianceand upon such report given on the authority of said firm as experts in auditingaccounting and accounting.

auditing. The audit report covering the December 31, 2019 consolidated financial statements contains an explanatory paragraph that states that the Company has experienced losses and negative cash flows from operations since its inception, has an accumulated deficit, and has debt obligations which raise substantial doubt about its ability to continue as a going concern. The consolidated financial statements do not include any adjustments that might result from the outcome of that uncertainty.

WHERE YOU CAN FIND MORE INFORMATION

We filed with the SEC a registration statement under the Securities Act of 1933 for the Shares under this prospectus. This prospectus does not contain all of the information in the registration statement and the exhibits and schedule that were filed with the registration statement. For further information with respect to us and our common stock, we refer you to the registration statement and the exhibits and schedule that were filed with the registration statement. Statements contained in this prospectus about the contents of any contract or any other document that is filed as an exhibit to the registration statement are not necessarily complete, and we refer you to the full text of the contract or other document filed as an exhibit to the registration statement. The SEC maintains a website that contains reports, proxy and information statements, and other information regarding registrants that file electronically with the SEC. The address of the website is www.sec.gov.

We file periodic reports under the Securities Exchange Act of 1934, including annual, quarterly and special reports, and other information with the Securities and Exchange Commission. These periodic reports and other information are available for inspection and copying at the SEC regional offices, public reference facilities and on the website of the SEC referred to above.

We make available free of charge on or through our internet website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. The information found on our website, www.opgen.com, other than as specifically incorporated by reference in this prospectus, is not part of this prospectus.

INCORPORATION BY REFERENCE

The SEC allows us to "incorporate“incorporate by reference"reference” in this prospectus the information in other documents that we file with it, which means that we can disclose important information to you by referring you to those documents containing such information. This prospectus is part of a registration statement we filed with the SEC. You should rely on the information incorporated by reference in this prospectus and the registration statement. The information incorporated by reference is considered to be part of this prospectus and information we file later with the SEC will automatically update and supersede this information and information contained in documents filed earlier with the SEC. We incorporate by reference the documents listed below, any filings made with the SEC after the date of the initial registration statement and prior to effectiveness of the registration statement, and any future filings made with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the termination of the offering; provided, that we are not incorporating by reference any documents or information deemed to have been furnished and not filed in accordance with SEC rules. The documents we are incorporating by reference are:

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·our Annual Report on Form 10-K for the year ended December 31, 2015,2019, filed with the SEC on March 30, 2016;24, 2020;
·the information specifically incorporated by reference into our Annual Report on Form 10-K for the year ended December 31, 2015 from our Definitive Proxy Statement on Schedule 14A, filed on April 29, 2016;
·the description of our common stock contained in theRegistration Statement on Form 8‑A8-A filed on April 30, 2015and any amendments to such Registration Statement filed subsequently thereto, including all amendments or reports filed for the purpose of updating such description.
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We will furnish to you, on written or oral request, a copy of any or all of the documents that have been incorporated by reference, including exhibits to these documents. You may request a copy of these filings at no cost by writing or telephoning our Secretary at the following address and telephone number:

OpGen, Inc.

Attention: Timothy C. Dec, Corporate Secretary

708 Quince Orchard Road, Suite 205

Gaithersburg, MD 20878

Telephone No.: (240) 813-1260

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WHERE YOU CAN FIND MORE INFORMATION
We have filed with the SEC a registration statement on Form S-3 under the Securities Act to register our securities being offered in this prospectus. This prospectus, which constitutes a part of the registration statement, does not contain all the information set forth in the registration statement or the exhibits and schedules filed thereto. For further information about us and our securities offered by this prospectus, we refer you to the registration statement and the exhibits and schedules filed with the registration statement. Any statement contained in this prospectus regarding the contents of any contract or any other document that is filed as an exhibit to the registration statement is not necessarily complete and each such statement is qualified in all respects by reference to the full text of such contract or other document filed as an exhibit to the registration statement. You may read and copy any materials we file with the SEC, including the registration statement, at the SEC's Public Reference Room at 100 F Street, NE, Washington, D.C. 20549, on official business days during the hours of 10:00 a.m. to 3:00 p.m. You may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC also maintains an Internet website that contains reports, proxy statements and other information about issuers, like us, that file electronically with the SEC. The address of that website is http://www.sec.gov. You may also inspect our SEC reports and other information at our website at www.opgen.com. Information on or accessible through our website is not a part of this prospectus. We are subject to the information reporting requirements of the Exchange Act, and file reports, proxy statements and other information with the SEC. These reports, proxy statements and other information are available for inspection and copying at the public reference room and website of the SEC referred to above.
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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The costs and expenses payable by the Company in connection with the offerings described in this registration statement are as follows:

SEC registration fee $5,066.90 
Legal fees and expenses $100,000.00*
Accounting fees and expenses $30,000.00*
Printer costs and expenses $2,000.00*
Total $137,066.90*
set forth below. The selling stockholder will not bear any portion of such expenses.

SEC registration fee $113.32 
Legal fees and expenses $10,000*
Accounting fees and expenses $10,000*
Printer costs and expenses $386.68*
     
Total $20,500 

_____________

*Estimated as permitted under Rule 511 of Regulation S-K.

Item 15. Indemnification of Directors and Officers.

Section 145 of the Delaware General Corporation Law, or the DGCL, authorizes a corporation to indemnify its directors and officers against liabilities arising out of actions, suits and proceedings to which they are made or threatened to be made a party by reason of the fact that they have served or are currently serving as a director or officer to a corporation. The indemnity may cover expenses (including attorneys'attorneys’ fees) judgments, fines and amounts paid in settlement actually and reasonably incurred by the director or officer in connection with any such action, suit or proceeding. Section 145 permits corporations to pay expenses (including attorneys'attorneys’ fees) incurred by directors and officers in advance of the final disposition of such action, suit or proceeding. In addition, Section 145 provides that a corporation has the power to purchase and maintain insurance on behalf of its directors and officers against any liability asserted against them and incurred by them in their capacity as a director or officer, or arising out of their status as such, whether or not the corporation would have the power to indemnify the director or officer against such liability under Section 145.

We have adopted provisions in our certificate of incorporation and bylaws that limit or eliminate the personal liability of our directors to the fullest extent permitted by the DGCL, as it now exists or may in the future be amended. Consequently, a director will not be personally liable to us or our stockholders for monetary damages or breach of fiduciary duty as a director, except for liability for:

·any breach of the director'sdirector’s duty of loyalty to usthe Company or ourits stockholders;
·any act or omission not in good faith or that involveswhich involve intentional misconduct or a knowing violation of law;
·any unlawful paymentspayment related to dividends or unlawful stock purchases, redemptions or other distributions; or
·any transaction from which the director derived an improper personal benefit.

These limitations of liability do not alter director liability under the federal securities laws and do not affect the availability of equitable remedies such as an injunction or rescission.

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In addition, our bylaws provide that:

·we will indemnify our directors, officers and, in the discretion of our board of directors, certain employees to the fullest extent permitted by the DGCL, as it now exists or may in the future be amended; and
·we will advance reasonable expenses, including attorneys'attorneys’ fees, to our directors and, in the discretion of our board of directors, to our officers and certain employees, in connection with legal proceedings relating to their service for or on behalf of us, subject to limited exceptions.

We have entered into indemnification agreements with each of our directors and executive officers. These agreements provide that we will indemnify each of our directors, such executive officers and, at times, their affiliates to the fullest extent permitted by Delaware law. We will advance expenses, including attorneys'attorneys’ fees (but excluding judgments, fines and settlement amounts), to each indemnified director, executive officer or affiliate in connection with any proceeding in which indemnification is available and we will indemnify our directors and officers for any action or proceeding arising out of that person'sperson’s services as a director or officer brought on behalf of us and/or in furtherance of our rights. Additionally, each of our directors may have certain rights to indemnification, advancement of expenses and/or insurance provided by their affiliates, which indemnification relates to and might apply to the same proceedings arising out of such director'sdirector’s services as a director referenced herein. Nonetheless, we have agreed in the indemnification agreements that our obligations to those same directors are primary and any obligation of the affiliates of those directors to advance expenses or to provide indemnification for the expenses or liabilities incurred by those directors are secondary.

We also maintain general liability insurance which covers certain liabilities of our directors and officers arising out of claims based on acts or omissions in their capacities as directors or officers, including liabilities under the Securities Act.

A stockholder'sstockholder’s investment may be adversely affected to the extent we pay the costs of settlement and damage awards against directors and officers as required by these indemnification provisions. At present, there is no pending litigation or proceeding involving any of our directors, officers or employees regarding which indemnification is sought, nor are we aware of any threatened litigation that may result in claims for indemnification.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers or persons controlling us pursuant to the foregoing provisions, we have been informed that, in the opinion of the SEC, this indemnification is against public policy as expressed in the Securities Act and is therefore unenforceable.

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Item 16. Exhibits.

The following exhibits are filed as part of, or incorporated by reference into this registration statement:

Exhibit

Number

Identification of Exhibit
1.1 +2.1Implementation Agreement, dated as of September 4, 2019, by and among Curetis N.V., Crystal GmbH, and OpGen (incorporated by reference to Exhibit 2.1 to the Registrant’s Current Report on Form 8-K, filed on September 4, 2019).
4.1Form of Underwriting Agreement
3.1Amended and RestatedCommon Stock Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.14.1 to the Registrant’s Annual Report on Form 10-K, filed on March 24, 2020).
5.1 *Opinion of Ballard Spahr LLP
10.1 *Agreement for the Issuance of and Subscription to Notes Convertible into Shares and Share Subscription Warrants, dated October 2, 2018, by and between Curetis GmbH and Yorkville.
10.2Assignment of the Agreement for the Issuance of and Subscription to Notes Convertible into Shares, dated February 24, 2020, among OpGen, Inc., YA II PN, LTD, and Curetis N.V. (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K, filed on May 13, 2015)
3.2Certificate of Correction to Amended and Restated Certificate of Incorporation of OpGen, Inc., filed June 6, 2016 (incorporated by reference to Exhibit 3.1 of Current Report on Form 8-K, filed on June 6, 2016)
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3.3Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 of Form S-1, filed on March 3, 2015)
4.1
Form of Common Stock Certificate of the Registrant (incorporated by reference to Exhibit 4.1 of Form S-1/A, File No. 333-202478, filed on AprilFebruary 28, 2015)
4.2Form of Warrant to Purchase Common Stock of OpGen, Inc.
5.1 *Opinion of Ballard Spahr LLP2020).
23.1 *Consent of CohnReznick LLP
23.2 *Consent of Ballard Spahr LLP (included in Exhibit 5.1)
24.1 *Power of Attorney  (on signature page)

_____________

+To be filed as an exhibit to a report filed pursuant to Sections 13(a), 13(c) or 15(d) of the Exchange Act or by post-effective amendment to the Registration Statement if securities are sold through one or more underwriters.
*Filed herewith.

Item 17. Undertakings.

(a)               The undersigned registrant hereby undertakes:

(1)               To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i)                To include any prospectus required by section 10(a)(3) of the Securities Act of 1933;

(ii)              To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the "Calculation“Calculation of Registration Fee"Fee” table in the effective registration statement; and

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(iii)            To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

Provided, however, that:

Paragraphs (1)(i), (1)(ii) and (1)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

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(2)               That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3)               To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4)               That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:

(i)                (i) If the registrant is relying on Rule 430B:

(A)             Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(B)             Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof, provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date; or

(ii)              If the registrant is subject to Rule 430C, each prospectus filed pursuant to Rule 424(b) as part of a registration statement relating to an offering, other than registration statements relying on Rule 430B or other than prospectuses filed in reliance on Rule 430A, shall be deemed to be part of and included in the registration statement as of the date it is first used after effectiveness, provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such first use, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such date of first use.

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(5)               That, for the purpose of determining liability of the registrant under the Securities Act of 1933 to any purchaser in the initial distribution of the securities:

The undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

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(i)                Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii)              Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii)            The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv)             Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(b)               The undersigned registrant hereby further undertakes that, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant'sregistrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of an employee benefit plan'splan’s annual report pursuant to section 15(d) of the Securities Exchange Act of 1934) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c)               Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act of 1933, and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question of whether such indemnification by it is against public policy as expressed in said act and will be governed by the final adjudication of such issue.

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(d)               The undersigned registrant hereby undertakes that:

(1)               For purposes of determining any liability under the Securities Act of 1933, the information omitted from the form of prospectus filed as part of this registration statement in reliance upon Rule 430A and contained in a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.

(2)               For the purpose of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Gaithersburg, State of Maryland on the 26th17th day of August, 2016.

June, 2020.

 OpGen, Inc.
  
 By:/s/ Evan Jones Oliver Schacht, Ph.D.
  
Evan Jones

Oliver Schacht, Ph.D
Chief Executive Officer

and Director

(principal executive officer)

By:/s/ Timothy C. Dec 
Timothy C. Dec
Chief Financial Officer and Secretary
(principal financial officer and
principal accounting officer)

POWER OF ATTORNEY


KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Evan Joneseach of Oliver Schacht, Ph.D. and Timothy C. Dec and each of them, as the true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution,re-substitution, for such personthem and in such person'stheir name, place and stead, in any and all capacities, to sign any orand all amendments (including pre-effective and post-effective amendments) to this Registration Statement,registration statement and any additional registration statements filed pursuant to Rule 462, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission (the SEC), and generally to do all such things in their names and behalf in their capacities as officers and directors to enable the Company to comply with the provisions of the Securities Act of 1933 and all requirements of the SEC, granting unto each said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises,connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or their or his substitute or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof.


Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statementregistration statement has been signed by the following persons in the capacities and on the dates indicated.

SIGNATURE
Signature
Title
TITLE
DATE
Date

/s/ Evan JonesOliver Schacht, Ph.D.
Oliver Schacht, Ph.D.

Chief Executive Officer and Director
(principal (principal executive officer)

August 26, 2016June 17, 2020
Evan Jones

/s/ Timothy C. Dec
Timothy C. Dec

Chief Financial Officer and Secretary

(principal(principal financial officer and principal accounting officer)

August 26, 2016June 17, 2020
Timothy C. Dec

/s/ Mario Crovetto
Mario Crovetto

Director

June 17, 2020

/s/ R. Donald Elsey
R. Donald Elsey

Director

June 17, 2020

/s/ Brian Atwood

Prabhavathi Fernandes, Ph.D.
Prabhavathi Fernandes, Ph.D.

Director

DirectorAugust 26, 2016June 17, 2020
Brian Atwood

/s/ Evan Jones

Evan Jones

Director

June 17, 2020

/s/ Harry D'Andrea

William Rhodes
William Rhodes

Director

DirectorAugust 26, 2016
Harry D'Andrea
/s/ Timothy J.R. Harris
DirectorAugust 26, 2016
Timothy J.R. Harris
/s/ Laurence McCarthy
DirectorAugust 26, 2016
Laurence McCarthy
/s/ David Rubin
DirectorAugust 26, 2016
David Rubin
/s/ Misti Ushio
DirectorAugust 26, 2016
Misti UshioJune 17, 2020


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EXHIBIT INDEX

Exhibit Number
Identification of Exhibit
1.1 +Form of Underwriting Agreement
3.1Amended and Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 of Current Report on Form 8-K, filed on May 13, 2015)
3.2Certificate of Correction to Amended and Restated Certificate of Incorporation of OpGen, Inc., filed June 6, 2016 (incorporated by reference to Exhibit 3.1 of Current Report on Form 8-K, filed on June 6, 2016)
3.3Amended and Restated Bylaws of the Registrant (incorporated by reference to Exhibit 3.2 of Form S-1, filed on March 3, 2015)
4.1
Form of Common Stock Certificate of the Registrant (incorporated by reference to Exhibit 4.1 of Form S-1/A, File No. 333-202478, filed on April 28, 2015)
4.2Form of Warrant to Purchase Common Stock of OpGen, Inc.
5.1 *Opinion of Ballard Spahr LLP
23.1 *Consent of CohnReznick LLP
23.2 *Consent of Ballard Spahr LLP (included in Exhibit 5.1)
24.1 *Power of Attorney  (on signature page)

+To be filed as an exhibit to a report filed pursuant to Sections 13(a), 13(c) or 15(d) of the Exchange Act or by post-effective amendment to the Registration Statement if securities are sold through one or more underwriters.II-7
*Filed herewith.

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