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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K10-K/A

Amendment No. 1

(Mark One)

ý


ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

o


TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT

(Mark One)

x  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2016

o  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT

For the transition period from              to            

For the transition period from                        to                       

Commission file number: 1-34392

Plug Power Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware

22-3672377

Delaware

(State or Other Jurisdiction
of Incorporation or Organization)

22-3672377

(I.R.S. Identification
Number)

968 ALBANY SHAKER ROAD, LATHAM, NEW YORK 12110

(Address of Principal Executive Offices, including Zip Code)

(518) 782-7700

(Registrant'sRegistrant’s telephone number, including area code)

 

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Name of Each Exchange on Which Registered

Common Stock, par value $.01 per share

The NASDAQ Capital Market

Series A Junior Participating Cumulative

Preferred Stock, par value $.01 per share

The NASDAQ Capital Market

Securities registered pursuant to Section 12(g) of the Act:None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes   o     No   ýx

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes   o     No   ýx

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sections 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes   ýx     No   o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).     Yes   ýx     No  o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant'sregistrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.o

 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of "large“large accelerated filer," "accelerated” “accelerated filer," "non-accelerated” “non-accelerated filer,"” “smaller reporting company,” and "smaller reporting company"“emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated
filero

Accelerated
filer

Accelerated filer ý

Non-accelerated filero

Smaller reporting company

Emerging Growth Company

o

x

o

o

o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   o

Note: The text for Form 10-K does not, and this amendment will not, appear in the Code of Federal Regulations.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  o      No   ýx

 

The aggregate market value of the voting and non-voting common equity of the registrant held by non-affiliates of the registrant on June 30, 20152016 was $421,918,775.$332,655,420.

 

As of March 7, 2016, 180,109,038April 28, 2017, 223,440,581 shares of the registrant'sregistrant’s common stock were issued and outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

 

None.

 




Table of Contents

PLUG POWER INC.

FORM 10-K/A

EXPLANATORY NOTE

The Registrant is filing this Amendment No. 1 on Form 10-K/A (this “Form 10-K/A”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2016 which was originally filed on March 10, 2017 (the “Original Form 10-K”) to include all of the Part III information required by applicable rules and regulations of the Securities and Exchange Commission (“SEC”). Our definitive proxy statement for our 2017 Annual Meeting of Stockholders will not be filed with the SEC within 120 days after the end of our fiscal year December 31, 2016; therefore, we are filing this Form 10-K/A to provide the incorporated information within the required time period.

In addition, Item 15 of Part IV has been solely amended to include new certifications by our principal executive officer and principal financial officer as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The certifications of our principal executive officer and principal financial officer are filed with this Amendment as Exhibits 31.1 and 31.2 hereto.

Except as expressly noted herein, this Form 10-K/A does not amend, update or change any other items or disclosures in the Original Form 10-K and does not purport to reflect any information or events subsequent to the filing of the Original Form 10-K.  Accordingly, this Form 10-K/A should be read in conjunction with the Original Form 10-K and our other reports filed with the SEC subsequent to the filing of the Original Form 10-K.

INDEX TO FORM 10-K10-K/A

PART III



Page

PART IItem 10.

Item 1.

Business


4

Item 1A.

Risk Factors

9

Item 1B.

Unresolved Staff Comments

21

Item 2.

Properties

22

Item 3.

Legal Proceedings

22

Item 4.

Mine Safety Disclosures

22

PART II

Item 5.

Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities


23

Item 6.

Selected Financial Data

25

Item 7.

Management's Discussion and Analysis of Financial Condition and Results of Operations

26

Item 7A.

Quantitative and Qualitative Disclosures About Market Risk

42

Item 8.

Financial Statements and Supplementary Data

42

Item 9.

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

42

Item 9A.

Controls and Procedures

42

Item 9B.

Other Information

43

PART III

Item 10.

Directors, Executive Officers and Corporate Governance


44

4

Item 11.

Executive Compensation

44

9

Item 12.

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

44

19

Item 13.

Certain Relationships and Related Transactions, and Director Independence

45

20

Item 14.

Principal Accounting Fees and Services

21

PART III

ITEM 10.     DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

(a)     DIRECTORS

The number of directors of the Company is presently fixed at ten (10), and the Board of Directors currently consists of ten(10) members. The Board of Directors is divided into three classes, with three (3) directors in Class I, four (4) directors in Class II, and three (3) directors in Class III. Directors in Classes I, II and III serve for three-year terms with one class of directors being elected by the Company’s stockholders at each Annual Meeting of Stockholders.

The Board of Directors has determined that Ms. Helmer and Messrs. Garberding, Schneider, McNamee, Willis, Hickey, Roth and Kenausis are independent directors as defined in Rule 5605(a)(2) under the Marketplace Rules of the National Association of Securities Dealers, Inc. (the “NASDAQ Rules”).

The positions of Chief Executive Officer and Chairman of the Board of Directors are currently each filled by a different individual, Andrew Marsh and George C. McNamee, respectively. If the position of Chairman of the Board of Directors is vacant, or if he or she is absent, the Chief Executive Officer presides, when present, at meetings of stockholders and of the Board of Directors.

Set forth below is certain information regarding the directors of the Company The ages of and biographical information regarding each director is based on information furnished to the Company by each director and is as of April 28, 2017.

Name

 

Age

 

Director
Since

 

Class I—Term Expires 2018

 

 

 

 

 

Andrew Marsh

 

61

 

2008

 

Gary K. Willis (1)(2)

 

70

 

2003

 

Maureen O. Helmer (1)(3)

 

60

 

2004

 

Class II—Term Expires 2019

 

 

 

 

 

George C. McNamee (2) 

 

70

 

1997

 

Johannes M. Roth (1)

 

38

 

2013

 

Xavier Pontone (4)

 

42

 

2013

 

Gregory L. Kenausis (1)

 

48

 

2013

 

Class III—Term Expires 2017

 

 

 

 

 

Larry G. Garberding

 

78

 

1997

 

Douglas T. Hickey (2)(3) 

 

62

 

2011

 

Luke Schneider

 

48

 

2017

 


(1)

Member of the Audit Committee.

45

PART IV

Item 15.(2)

Exhibits, Financial Statement SchedulesMember of the Compensation Committee.


46

(3)

Member of the Corporate Governance and Nominating Committee.

(4)

Designated by Air Liquide — See Item 13 of this report.


TableThe principal occupation and business experience for at least the last five years for each director of Contents


PART I

Forward-Looking Statementsthe Company is set forth below. The biographies of each of the directors below contains information regarding the person’s service as a director, business experience, director positions held currently or at any time during the last five years, information regarding the experiences, qualifications, attributes or skills that caused the Corporate Governance Committee and the Board of Directors to determine that the person should serve as a director.

 

Andrew J. Marsh has served as Chief Executive Officer, President and member of the Board of Directors of the Company since April 8, 2008. Previously, Mr. Marsh was a co-founder of Valere Power, where he served as CEO and Board Member from the Company’s inception in 2001 through its sale to Eltek ASA in 2007. Under his leadership, Valere grew into a profitable global operation with over 200 employees and $90 million in revenues derived from the sale of DC power products to the telecommunications sector. During Mr. Marsh’s tenure, Valere Power received many awards such as the Tech Titan award as the fastest growing technology company in the Dallas/Fort Worth area and the Red Herring Top 100 Innovator Award. Prior to founding Valere, he spent almost 18 years with Lucent Bell Laboratories in a variety of sales and technical management positions. Mr. Marsh is a member of the board of directors of GEVO, Inc.  Mr. Marsh holds a Bachelor of Science in Electrical Engineering Technology from Temple University, a Master of Science in Electrical Engineering from Duke University and a Masters of Business Administration from Southern Methodist University. We believe Mr. Marsh’s qualifications to sit on our Board of Directors include his record of success in leadership positions in technology companies having attributes similar to our Company, his extensive experience in management positions as well as his educational background in engineering and business administration.

Gary K. Willis has been a director of the Company since 2003. Mr. Willis joined Zygo Corporation’s Board of Directors in June 2009 after retiring as Chairman of the Board of Directors in November 2000, having served in that capacity since November 1998. Zygo Corporation, which was acquired in 2014 by Ametek, Inc., was a provider of metrology, optics, optical assembly, and systems solutions to the semiconductor, optical manufacturing, and industrial/automotive markets. Mr. Willis had been a director of Zygo Corporation since February 1992 and also served as President from 1992 to 1999 and as Chief Executive Officer from 1993 to 1999. Prior to joining Zygo Corporation, Mr. Willis served as the President and Chief Executive Officer of The following discussion should be readFoxboro Company, a manufacturer of process control instruments and systems. Mr. Willis is also a director of Middlesex Health Services, Inc. Mr. Willis holds a Bachelor of Science degree in conjunctionMechanical Engineering from Worcester Polytechnic Institute. We believe Mr. Willis’ qualifications to sit on our Board of Directors include his extensive experience in management and director positions with our accompanying Consolidated Financial Statementssimilar companies, as well as his educational background in mechanical engineering.

Maureen O. Helmer has been a director of the Company since 2004. Maureen O. Helmer is currently a member of the law firm Barclay Damon, LLP and Notes thereto included within this Annual Reportis the Chair of the firm’s Regulatory Practice Area. Prior to her joining Barclay Damon, LLP, Ms. Helmer was a member of Green & Seifter Attorneys, PLLC. From 2003 through 2006, she practiced as a partner in the law firm of Couch White, LLP and then as a solo practitioner. Ms. Helmer has advised international energy, telecommunications and industrial

companies on Form 10-K.policy and government affairs issues. In addition to historical information, this Annual Reportserving as Chair of the New York State Public Service Commission (PSC) from 1998 to 2003, Ms. Helmer also served as Chair of the New York State Board on Form 10-KElectric Generation Siting and the following discussion contain statements that are not historical facts and are considered forward-looking within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These forward-looking statements contain projections of our future results of operations or of our financial position or state other forward-looking information. In some cases you can identify these statements by forward-looking words such as "anticipate," "believe," "could," "continue," "estimate," "expect," "intend," "may," "should," "will," "would," "plan," "projected" or the negative of such words or other similar words or phrases. We believe that it is important to communicate our future expectations to our investors. However, there may be events in the future that we are not able to accurately predict or control and that may cause our actual results to differ materially from the expectations we describe in our forward-looking statements. Investors are cautioned not to unduly rely on forward-looking statements because they involve risks and uncertainties, and actual results may differ materially from those discussed as a result of various factors, including, but not limited to: the risk that we continue to incur losses and might never achieve or maintain profitability; the risk that we will need to raise additional capital to fund our operations and such capital may not be available to us; the risk that our lack of extensive experience in manufacturing and marketing products may impact our ability to manufacture and market products on a profitable and large-scale commercial basis; the risk that unit orders will not ship, be installed and/or converted to revenue, in whole or in part; the risk that a loss of one or more of our major customers could result in a material adverse effect on our financial condition; the risk that a sale of a significant number of shares of stock could depress the market price of our common stock; the risk that negative publicity related to our business or stock could result in a negative impact on our stock value and profitability; the risk of potential losses related to any product liability claims or contract disputes; the risk of loss related to an inability to maintain an effective system of internal controls; our ability to attract and maintain key personnel; the risks related to the use of flammable fuels in our products; the risk that pending orders may not convert to purchase orders, in whole or in part; the cost and timing of developing, marketing and selling our products and our ability to raise the necessary capital to fund such costs; our ability to obtain financing arrangements to support the sale or leasing of our products and services to customers; the ability to achieve the forecasted gross margin on the sale of our products; the cost and availability of fuel and fueling infrastructures for our products; the risk of elimination of government subsidies and economic incentives for alternative energy products; market acceptance of our products and services, including GenDrive units; our ability to establish and maintain relationships with third parties with respect to product development, manufacturing, distribution and servicing and the supply of key product components; the cost and availability of components and parts for our products; our ability to develop commercially viable products; our ability to reduce product and manufacturing costs; our ability to successfully market, distribute and service our products and services internationally; our ability to improve system reliability for our products; competitive factors, such as price competition and competition from other traditional and alternative energy companies; our ability to protect our intellectual property; the cost of complying with current and future federal, state and international governmental regulations; the risks associated with potential future acquisitions; the volatility of our stock price; and other risks and uncertainties discussed under Item IA—Risk Factors. Readers should not place undue reliance on our forward-looking statements. These forward-looking statements speak only as of the date on which the statements were made and are not guarantees of future performance. Except as may be required by applicable law, we do not undertake or intend to update any forward-looking statements after the date of this Annual Report on Form 10-K.


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Item 1.    Business

        Plug Power Inc., or the Company, is a leading provider of alternative energy technology focused on the design, development, commercialization and manufacture of hydrogen fuel cell systems used primarily for the material handling and stationary power market.

        We are focused on proton exchange membrane, or PEM, fuel cell and fuel processing technologies, fuel cell/battery hybrid technologies, and associated hydrogen storage and dispensing infrastructure from which multiple products are available. A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity and heat without combustion. Hydrogen is derived from hydrocarbon fuels such as liquid petroleum gas, or LPG, natural gas, propane, methanol, ethanol, gasoline or biofuels. Plug Power develops complete hydrogen delivery, storage and refueling solutions for customer locations. Hydrogen can also be obtained from the electrolysis of water, or produced on-site at consumer locations through a process known as reformation. Currently the Company obtains hydrogen by purchasing it from fuel suppliers.

        We provide and continue to develop fuel cell product solutions to replace lead-acid batteries in material handling vehicles and industrial trucks for some of the world's largest distribution and manufacturing businesses with a primary focus on North America. We are focusing our efforts on material handling applications (forklifts) at multi-shift high volume manufacturing and high throughput distribution sites where our products and services provide a unique combination of productivity, flexibility and environmental benefits. Our current product line includes: GenDrive, our hydrogen fueled PEM fuel cell system providing power to material handling vehicles; GenFuel, our hydrogen fueling delivery system; GenCare, our ongoing maintenance program for both the GenDrive fuel cells and GenFuel products; ReliOn, our stationary fuel cell solution providing scalable, modular PEM fuel cell power to support the backup and grid-support power requirements of the telecommunications, transportation, and utility sectors; GenKey, our turn-key solution coupling together GenDrive or ReliOn, GenFuel and GenCare, offering complete simplicity to customers transitioning to fuel cell power; and GenFund, a collaboration with leasing organizations to provide cost efficient and seamless financing solutions to customers.

        We provide our products worldwide, with a primary focus on North America, through our direct product sales force, leveraging relationships with original equipment manufacturers, or OEMs, and their dealer networks. Through July 31, 2015, we were a party to a joint venture based in France with Axane, S.A. (Axane), a subsidiary of Air Liquide, under the name HyPulsion, to develop and sell hydrogen fuel cell systems for the European material handling market. On July 31, 2015 we purchased all of Axane's equity interest in HyPulsion and now hold 100% of such interests. See note 4 of the Company's consolidated financial statements regarding our acquisition of the remaining ownership of HyPulsion.Environment. Prior to the acquisition the Company had a zero basis in its equity investment.

        We were organizedher appointment as a corporation in the State of Delaware on June 27, 1997.

        Unless the context indicates otherwise, the terms "Company," "Plug Power," "we," "our" or "us"Chair, Ms. Helmer served as used herein refers to Plug Power Inc. and its subsidiaries.

        We are committed to developing effective, economical and reliable fuel cell related products, systems and services for businesses and government agencies. Building on our substantial fuel cell application and product integration experience, we are focused on generating strong relationships with customers who value increased reliability, productivity and energy security.


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        Our business strategy leverages our unique fuel cell application and integration knowledge to identify early adopter markets for which we can design and develop innovative systems and customer solutions that provide superior value, ease-of-use and environmental design.

        We have made significant progress in penetrating the material handling market, supported through the deployment of over 10,300 GenDrive units into commercial applications. We believe we have developed reliable products which allow the end customers to eliminate incumbent power sources from their operations, and realize their sustainability objectives through clean energy alternatives. In addition, we have deployed our GenKey hydrogen and fuel cell solution to multiple customer sites.

        Our primary strategy is to focus our resources on the material handling market. Through established customer relationships, Plug Power has proven itself as a trusted partner with a reliable fuel cell solution. Our strategy also includes the following objectives: decrease product costs by leveraging the supply chain, lower manufacturing costs, improve system reliability, expand our sales network to effectively reach more of our targeted customers and provide customers with high-quality products, service and post-sales support experience.

        Our longer-term objectives are to deliver economic, social, and environmental benefits in terms of reliable, clean, cost-effective fuel cell solutions and, ultimately, productivity.

        We believe continued investment in research and development is critical to the development and enhancement of innovative products, technologies and services. In addition to evolving our direct hydrogen fueled systems, we continue to capitalize on our investment and expertise in power electronics, controls, and software design.

        We continue to develop and monitor future fuel cell solutions that align with our evolving product roadmap. By leveraging our current GenDrive architecture, Plug Power is evaluating adjacent markets such as transport refrigeration units (TRU), ground support equipment (GSE) and range extenders.

        We manage our business as a single operating segment, emphasizing shared learning across end-user applications and common supplier/vendor relationships.

        We provide and continue to develop hydrogen and fuel cell product solutions to replace lead-acid batteries in material handling vehicles and industrial trucks for some of North America's largest distribution and manufacturing businesses. We are focusing our efforts on material handling applications (forklifts) at multi-shift high volume manufacturing and high throughput distribution sites where our products and services provide a unique combination of productivity, flexibility and environmental benefits. Additionally, we manufacture and sell fuel cell products to replace batteries and diesel generators in stationary backup power applications. These products prove valuable with telecommunications, transportation and utility customers as a robust, reliable and sustainable power solution. Our current products and services include:


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        To promote fuel cell adoption and maintain post-sale customer satisfaction, we offer a range of service and support options through extended maintenance contracts. Additionally, customers may waive our service option, and choose to service their systems independently. A high percentage of fuel cells sold in recent years were bundled with maintenance contracts. As a result, only 3% of fuel cells deployed are still under standard warranty that is not a part of an extended maintenance contract.

        The Company's products and services predominantly serve the North American material handling market, and primarily support large fleet, multi-shift operations in high-volume manufacturing and high-throughput distribution centers. Based on recent market experience, it appears there may be some seasonality to sales stemming from varied customer appropriation cycles; however, these market factors will continue to evolve and the Company's insight to these trends will improve with continued commercial success and time.

        Orders for the Company's products and services in 2015 approximated $205.3 million compared to total orders in 2014 of $151.4 million. The Company's backlog for products and services as of December 31, 2015 was approximately $235.6 million, compared to the Company's backlog as of December 31, 2014 of approximately $133.4 million. The Company's backlog at any given time is comprised of products, hydrogen installations, maintenance services, and hydrogen fuel deliveries. The specific elements of the backlog will vary in terms of timing of delivery and can vary between 90 days to 10 years, with products and hydrogen installations being delivered near term and maintenance services and hydrogen fuel deliveries being delivered over a longer period of time. Historically, shipments made against these product orders generally occur between ninety days and twenty-four months from the date of acceptance of the order.

        For the year ended December 31, 2015, the only customer exceeding 10% of total consolidated revenues was Walmart, which accounted for 56.7% of our total consolidated revenues. A loss or decline in business with this customer could have an adverse impact on our business, financial condition and results of operations.

        We assemble our products at our manufacturing facilities in Latham, New York and Spokane, Washington, and provide our services and installations at customer locations. Currently, the supply and


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manufacture of varied critical components used in our products and services are performed by sole-sourced third-party vendors in the U.S., Canada and China.

        We have developed strategic relationships with well-established companies in key areas including distribution, service, marketing, supply, technology development and product development. We sell our products worldwide, with a primary focus on North America, through our direct product sales force, original equipment manufacturers, or OEMs, and their dealer networks. Additionally, we operate in Europe under the name HyPulsion, to develop and sell hydrogen fuel cell systems for the European material handling market.

        We are confronted by aggressive competition in all areas of our business. The markets we address for motive power are characterized by the presence of well-established battery and combustion generator products. Over the past several years, there has been price competition in these markets. In addition to overall pricing, the principal competitive factors in the markets in which we operate include product features, including size and weight, relative price and performance, product quality and reliability, design innovation, marketing and distribution capability, service and support and corporate reputation.

        In the material handling market, we believe our GenDrive products have an advantage over lead-acid batteries for customers who run high-throughput distribution centers and manufacturing locations with multi-shift operations by offering increased productivity with lower operational costs. However, we expect competition in this space to intensify as competitors attempt to imitate our approach with their own offerings. These competitors may have greater resources than we currently have.

        We believe that neither we nor our competitors can achieve a significant proprietary position on the basic technologies currently used in PEM fuel cell systems. However, we believe the design and integration of our system and system components, as well as some of the low-cost manufacturing processes that we have developed, are intellectual property that can be protected. Our intellectual property portfolio covers among other things: fuel cell components that reduce manufacturing part count; fuel cell system designs that lend themselves to mass manufacturing; improvements to fuel cell system efficiency, reliability and system life; and control strategies, such as added safety protections and operation under extreme conditions. In general, our employees are party to agreements providing that all inventions, whether patented or not, made or conceived while being our employee, which are related to or result from work or research that we perform, will remain our sole and exclusive property.

        We have a total of 161 issued patents currently active with the USPTO. At the close of 2015, we had two U.S. patent applications pending. Additionally, we have 12 trademarks registered with the USPTO and no trademark applications pending.

        Our products and their installations are subject to oversight and regulation at the state and local level in accordance with state and local statutes and ordinances relating to, among others, building codes, fire codes, public safety, electrical and gas pipeline connections and hydrogen siting. The level of regulation may depend, in part, upon where a system is located.


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        In addition, product safety standards have been established by the American National Standards Institute, or ANSI, covering the overall fuel cell system. The class 1, 2 and 3 GenDrive products are designed with the intent of meeting the requirements of UL 2267 "Fuel Cell Power Systems for Installation in Industrial Electric Trucks" and NFPA 505 "Fire Safety Standard for Powered Industrial Trucks". The hydrogen tanks used in these systems have been either certified to ANSI/CSA NGV2-2007 "Compressed Natural Gas Vehicle Fuel Containers" or ISO/TS 15869 "Gaseous hydrogen and hydrogen blends—Land vehicle fuel tanks". We will continue to design our GenDrive products to meet ANSI and/or other standards in 2016. We certified several models of Class 1, 2 and 3 GenDrive products to the requirements of the CE mark with guidance from a European certified body. The hydrogen tanks used in these systems are certified to the Pressure Equipment Directive by a European certified body.

        The GenFuel hydrogen storage and dispensing products are designed with the intent of meeting the requirements of NFPA 2 "Hydrogen Technologies Code".

        Other than these requirements, at this time we do not know what additional requirements, if any, each jurisdiction will impose on our products or their installation. We also do not know the extent to which any new regulations may impact our ability to distribute, install and service our products. As we continue distributing our systems to our target markets, the federal, state, local or foreign government entities may seek to impose regulations or competitors may seek to influence regulations through lobbying efforts.

        Most components essential to our business are generally available from multiple sources. We currently obtain certain components including, but not limited to, fuel cell stack materials, and other hydrogen components from single or limited sources. We are, however, evaluating and testing alternate component sources.

        We are party to supply agreements with suppliers for fuel cell stacks and stack components which provide for terms through December 31, 2017. Under these agreements, we are not obligated to purchase fuel cell stacks solely from these suppliers and may purchase from alternate suppliers. In addition, in 2015, we began to produce fuel cell stacks and expect to both source them externally and produce them internally for the foreseeable future.

        We believe there are component suppliers and manufacturing vendors whose loss to us could have a material adverse effect upon our business and financial condition. Such vendors include sources of our fuel cell stacks. We are mitigating these potential risks by introducing alternate system architectures which we expect will allow us to diversify our supply chain with multiple fuel cell stack and air supply component vendors. We are also working closely with these vendors and other key suppliers on coordinated product introduction plans, strategic inventories, and internal and external manufacturing schedules and levels.

        Because the fuel cell industry is characterized by its early state of adoption, our ability to compete successfully is heavily dependent upon our ability to ensure a continual and timely flow of competitive products, services, and technologies to the marketplace. We continue to develop new products and technologies and to enhance existing products in the areas of cost, size, weight, and in supporting service solutions in order to drive further commercialization.

        We may expand the range of our product offerings and intellectual property through licensing and/or acquisition of third-party business and technology. Our research and development expense totaled $14.9 million, $6.5 million and $3.1 million in 2015, 2014 and 2013, respectively. We also had


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cost of research and development contract revenue of $0.5 million, $3.2 million and $2.5 million in 2015, 2014 and 2013, respectively. These expenses represent the cost of research and development programs that are partially funded under cost reimbursement research and development arrangements with third parties and are reported within other cost of revenue on the consolidated statements of operations.

        As of December 31, 2015, we had 439 employees, including 95 temporary employees. We consider our relationship with our employees to be positive.

        Please refer to our Geographic Information included in our Consolidated Financial Statements and notes thereto included in Part II, Item 8: Financial Statements and Supplementary Data of this Form 10-K.

        Our Annual Report 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 Exchange Act are available free of charge, other than an investor's own internet access charges, on the Company's website with an internet address of www.plugpower.com as soon as reasonably practicable after the Company electronically files such material with, or furnishes it to the Securities and Exchange Commission (SEC). The information contained on our website is not included as a part of, or incorporated by reference into, this Annual Report on Form 10-K. The public may read and copy any materials the Company files with the SEC at the SEC's Public Reference Room at 100 F Street, N.E., Washington, DC 20549. The public may also obtain information on the operationCommissioner of the Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC also maintains an internet site that contains reports, proxyService Commission from 1997 until 1998 and information statements, and other information regarding issuers that file electronically with the SEC. The SEC's website address is http://www.sec.gov.

Item 1A.    Risk Factors

        The following risk factors should be considered carefully in additionwas General Counsel to the other informationDepartment of Public Service from 1995 through 1997. From 1984 through 1995, Ms. Helmer held several positions in this Annual Report on Form 10-K. The occurrence of anythe New York Legislature, including Counsel to the Senate Energy Committee. She also served as a board member of the following material risks could harm our businessNew York State Energy Research and future resultsDevelopment Authority, the New York State Environmental Board and the New York State Disaster Preparedness Commission during her tenure as Chair of operations and could result in the trading pricePSC. In addition, she was Vice Chair of our common stock decliningthe Electricity Committee of the National Association of Regulatory Utility Commissioners and a partial or complete loss of your investment. These risks are not the only ones that we face. Additional risks not presently known to us or that we currently consider immaterial may also impair our business operations and trading price of our common stock. Except as mentioned under "Quantitative and Qualitative Disclosure About Market Risk" and except for the historical information contained herein, the discussion contained in this Annual Report on Form 10-K contains "forward-looking statements," within the meaning of Section 27Amember of the Securities Act and Section 21ENARUC Board of Directors. She was also appointed to serve as a member of the Exchange Act, that involve risksNew York State Cyber-Security Task Force. She formerly served as a board member of the Center for Internet Security, the Center for Economic Growth, and uncertainties. Please referNY Women in Communications and Energy. Ms. Helmer earned her Bachelor of Science from the State University at Albany and her Juris Doctorate from the University of Buffalo law school. She is admitted to the section entitled "Forward-Looking Statements."

Our products and services face intense competition and we may be unablepractice law in New York. We believe Ms. Helmer’s qualifications to compete successfully.

        The markets for energy products are intensely competitive. Some of our competitors in the motive power sector (predominantly incumbent technologies) are much larger than we are and may have the manufacturing, marketing and sales capabilities to complete research, development and commercialization of profitable, commercially viable products more quickly and effectively than we can. There are many companies engaged in all areas of traditional and alternative energy generation in the


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United States, Canada and abroad, including, among others, major electric, oil, chemical, natural gas, battery, generator and specialized electronics firms, as well as universities, research institutions and foreign government-sponsored companies. These firms are engaged in forms of power generation such as advanced battery technologies, generator sets, fast charged technologies and other types of fuel cell technologies. Technological advances in alternative energy products, battery systems or other fuel cell technologies may make our products less attractive or render them obsolete.

We depend on a concentration of anchor customers for the majority of our revenues and the loss of any one or more of these customers, or a significant loss, reduction or rescheduling of orders from any of these customers, would have a material adverse effectsit on our business, financial condition, resultsBoard of operationsDirectors include her long history of experience with energy regulation, policy and cash flows.government affairs and advising energy and industrial companies.

 We sell most of our products to a range of customers that include a few anchor customers, and while we are continually seeking to expand our customer base, we expect this will continue for the next several years. At December 31, 2015, two customers comprise approximately 50.9%

George C. McNamee serves as Chairman of the total accounts receivable balance,Company’s Board of Directors and has served as such since 1997. He was previously Chairman of First Albany Companies (now GLCH) and a Managing Partner of FA Tech Ventures, an information and energy technology venture capital firm. Mr. McNamee’s background in investment banking has given him broad exposure to many financing and merger and acquisition issues. As an executive, he has dealt with each customer individually representing 38.5% and 12.4% of total accounts receivable, respectively. At December 31, 2014, four customers comprise approximately 69.9% of the total accounts receivable balance, with each customer individually representing 30.2%, 16.0%, 13.4% and 10.3% of total accounts receivable, respectively. For the year ended December 31, 2015, 56.7% of total consolidated revenues were associated primarily with Walmart. For the year ended December 31, 2014, 37.2% of total consolidated revenues were associated primarily with Walmart and Volkswagen, representing 24.1% and 13.1% of total consolidated revenues, respectively. For the year ended December 31, 2013, comprised 33.2% of our total consolidated revenues were associated with primarily three customers, with Mercedes-Benz, Procter & Gamble, and Lowe's representing 11.6%, 11.2%, and 10.4% of total consolidated revenues, respectively. Any decline in business with significant customers could have an adverse impact on our business, financial condition and results of operations. Our future success is dependent upon the continued purchases of our products by a small number of customers. Any fluctuations in demand from such customers or other customers may negatively impact our business, financial condition and results of operations. If we are unable to broaden our customer base and expand relationships with potential customers, our business will continue to be impacted by unanticipated demand fluctuations due to our dependence on a small number of customers. Unanticipated demand fluctuations can have a negative impact on our revenues, business, financial condition, results of operations and cash flows. In addition, our dependence on a small number of major customers exposes us to numerous other risks, including: a slowdown or delay in a customer's deployment of our products could significantly reduce demand for our products; reductions in a single customer's forecasts and demand could result in excess inventories; the current or future economic conditions could negatively affect one or more of our major customers and cause them to significantly reduce operations, or file for bankruptcy; consolidation of customers can reduce demand as well as increase pricing pressure on our products due to increased purchasing leverage; each of our customers has significant purchasing leverage over us to require changes in sales terms including pricing, payment terms and product delivery schedules; and concentration of accounts receivable credit risk, which could have a material adverse effect on our business, financial condition, results of operations and cash flows if one of our major customers declared bankruptcy or delayed payment of their receivables.

The reduction or elimination of government subsidies and economic incentives for alternative energy technologies could reduce demand for our products, lead to a reduction in our revenues, and adversely impact our operating results.

        We believe that the near-termrapid- growth of alternative energy technologies is affected by the availability and size of government and economic incentives. Many of these government incentives expire, phase out over time, may exhaust the allocated funding, or require renewal by the applicable authority. In addition, these incentive programs could be reduced or discontinued for other reasons.


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For example, the investment tax credit is currently scheduled to expire on December 31, 2016. The reduction, elimination, or expiration of the investment tax credit or other government subsidies and economic incentives may result in the diminished economic competitiveness of our products to our customers and could materially and adversely affect the growth of alternative energy technologies, including our products, as well as our future operating results and liquidity.

The loss of one or more of our key supply partners or any material change in their product costs, product performance, or product availability could have a material adverse effect on our business.

        We have certain key suppliers who we rely on for critical components in our products, and there are numerous other components for our products that are sole sourced. A supplier's failure to develop and supply components in a timely manner or at all, or to develop or supply components that meet our quality, quantity or cost requirements, or our inability to obtain substitute sources of these components on a timely basis or on terms acceptable to us, could harm our ability to manufacture our products. In addition, to the extent that our supply partners use technology or manufacturing processes that are proprietary, we may be unable to obtain comparable components from alternative sources.

        In addition, commodity prices and supply levels affect our costs. For example, platinum is a key material in our PEM fuel cells. Platinum is a scarce natural resource and we are dependent upon a sufficient supply of this commodity. Any shortages could adversely affect our ability to produce commercially viable fuel cell systems and significantly raise our cost of producing our fuel cell systems. While we do not anticipate significant near- or long-term shortages in the supply of platinum, a shortage could adversely affect our ability to produce commercially viable PEM fuel cells or raise our cost of producing such products.

We have incurred losses, anticipate continuing to incur losses and might never achieve or maintain profitability.

        We have not achieved operating profitability in any quarter since our formation and we will continue to incur net losses until we can produce sufficient revenue to cover our costs. Our net losses attributable to the Company were approximately $55.7 million in 2015, $88.5 million in 2014, $62.7 million in 2013, $31.9 million in 2012, and $27.5 million in 2011. As of December 31, 2015, we had an accumulated deficit of $993.9 million. We anticipate that we will continue to incur losses until we can produce and sell our products on a large-scale and cost-effective basis. We cannot guarantee when we will operate profitably, if ever. In order to achieve profitability, management must successfully execute our planned path to profitability in the early adoption markets on which we are focused. The hydrogen infrastructure that is needed to support our growth readiness and cost efficiency must be available and cost efficient. We must continue to shorten the cycles in our product roadmap with respect to improvement in product reliability and performance that our customers expect. We must execute on successful introduction of our products into the market. We must accurately evaluate our markets for, and react to, competitive threats in both other technologies (such as advanced batteries) and our technology field. Finally, we must continue to lower our products' build costs and lifetime service costs. If we are unable to successfully take these steps, we may never operate profitably, and, even if we do achieve profitability, we may be unable to sustain or increase our profitability in the future.

We may require additional capital funding and such capital may not be available to us.

        We have experienced recurring operating losses and as of December 31, 2015, we had an accumulated deficit of approximately $993.9 million. On December 31, 2015, we had cash and cash equivalents of $64.0 million, restricted cash of $47.8 million and net working capital of $88.5 million. This compares to $146.2 million, $0.5 million and $167.0 million, respectively, on December 31, 2014. Restricted cash becomes available to us as we perform in accordance with the related leasing agreements.


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        Our cash requirements relate primarily to working capital needed to operate and grow our business, including servicing operating lease agreements, funding operating expenses, growth in inventory to support both shipments of new units and servicing the installed base, funding the growth in our GenKey "turn-key" solution which also includes the installation of our customer's hydrogen infrastructure as well as delivery of the hydrogen fuel, and continued development and expansion of our products. Our ability to achieve profitability and meet future liquidity needs and capital requirements will depend upon numerous factors, including the timing and quantity of product orders and shipments; attaining positive gross margins; the timing and amount of our operating expenses; the timing and costs of working capital needs; the timing and costs of building a sales base; the ability of our customers to obtain financing to support commercial transactions; our ability to obtain financing arrangements to support the sale or leasing of our products and services to customers and the terms of such agreements which may require us to pledge or restrict substantial amounts of our cash to support these financing arrangements; the timing and costs of developing marketing and distribution channels; the timing and costs of product service requirements; the timing and costs of hiring and training product staff; the extent to which our products gain market acceptance; the timing and costs of product development and introductions; the extent of our ongoing and new research and development programs; and changes in our strategy or our planned activities. If we are unable to fund our operations with positive cash flows and cannot obtain external financing, we may not be able to sustain future operations. As a result, we may be required to delay, reduce and/or cease our operations and/or seek bankruptcy protection.

        We cannot assure you that any necessary additional financing will be available on terms favorable to us, or at all. We believe that it could be difficult to raise additional funds and there can be no assurance as to the availability of additional financing or the terms upon which additional financing may be available. Additionally, even if we raise sufficient capital through additional equity or debt financings, strategic alternatives or otherwise, there can be no assurance that the revenue or capital infusion will be sufficient to enable us to develop our business to a level where it will be profitable or generate positive cash flow. If we raise additional funds through the issuance of equity or convertible debt securities, the percentage ownership of our stockholders could be significantly diluted, and these newly issued securities may have rights, preferences or privileges senior to those of existing stockholders. If we incur additional debt, a substantial portion of our operating cash flow may be dedicated to the payment of principal and interest on such indebtedness, thus limiting funds available for our business activities. The terms of any debt securities issued could also impose significant restrictions on our operations. Broad market and industry factors may seriously harm the market price of our common stock, regardless of our operating performance, and may adversely impact our ability to raise additional funds. If we raise additional funds through collaborations and/or licensing arrangements, we might be required to relinquish significant rights to our technologies, or grant licenses on terms that are not favorable to us.

Our ability to obtain financing arrangements to support the sale or leasing of our products and services to customers may affect our sales, profitability and liquidity.

        Customers representing most of our revenue lease, rather than purchase, our products. These lease arrangements require us to finance the purchase of such products, either ourselves or through third-party financing sources. For example, approximately $46.8 million of our cash is currently pledged or restricted to support such leasing arrangements, which prevents us from using such cash for other purposes. To date, we have been successful in obtaining or providing the necessary financing arrangements. There is no certainty, however, that we will be able to continue to obtain or provide adequate financing for these arrangements on acceptable terms, or at all, in the future. Failure to obtain or provide such financing may result in the loss of material customers and product sales, which could have a material adverse effect on our business, financial condition and results of operations. Further, if we are required to continue to pledge or restrict substantial amounts of our cash to support


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these financing arrangements, such cash will not be available to us for other purposes, which may have a material adverse effect on our liquidity and financial position.

Unless we lower our product costs and improve reliability, our product sales could be adversely affected.

        The actual cost of our product solutions is often higher than many established competing technologies. The primary current value proposition for our customers stems from productivity gains in using our solutions. Longer term, given evolving market dynamics and potential changes in alternative energy tax credits, if we are unable to successfully develop future products that are competitive with competing technologies in terms of price, reliability and longevity, customers may not buy our products. The profitability of our products depends largely on material and manufacturing costs and the market price of hydrogen. We cannot guarantee that we will be able to lower these costs to the levels to assure market acceptance in conjunction with other critical customer criteria in performance and reliability.

Delays in our product development could have a material impact on the profitable commercialization of our products.

        If we experience delays in meeting our development goals, our products exhibit technical defects, or if we are unable to meet cost or performance goals, including power output, useful life and reliability, the profitable commercialization of our products will be delayed. In this event, potential purchasers of our products may choose alternative technologies and any delays could allow potential competitors to gain market advantages. We cannot assure that we will successfully meet our commercialization schedule in the future.

Our product sales and performance depends on the availability of hydrogen and our lack of control over or limited availability of such fuel may adversely impact our sales and product deployment.

        Our products and services depend largely on the availability of hydrogen gas. We are dependent upon hydrogen suppliers for success with the profitable commercialization of our products and services. Although we will continue to work with hydrogen suppliers to mutually agree on terms for our customers, including, but not limited to, the competitiveness of the price of the hydrogen fuel, liquid hydrogen, hydrogen infrastructure and service costs, to the benefit of our product value proposition, ultimately we have no control over such third parties. If these fuels are not readily available or if their prices are such that energy produced by our products costs more than energy provided by other sources, then our products could be less attractive to potential users and our products' value proposition could be negatively affected. If hydrogen suppliers elect not to participate in the material handling market, there may be an insufficient supply of hydrogen for this market that could negatively affect our sales and deployment of our products and services.

Our purchase orders may not ship, be commissioned or installed, or convert to revenue, and our pending orders may not convert to purchase orders, which may have a material adverse effect on our revenue and cash flow.

        Some of the orders we accept from customers require certain conditions or contingencies to be satisfied, or may be cancelled, prior to shipment or prior to commissioning or installation, some of which are outside of our control. Historically, shipments made against these orders have generally occurred between ninety days and twenty-four months from the date of acceptance of the order. Orders for the Company's products and services in 2015 approximated $205.3 million compared to total orders in 2014 of $151.4 million. The Company's backlog for products and services as of December 31, 2015 was approximately $235.6 million, compared to the Company's backlog as of December 31, 2014 of approximately $133.4 million. The time periods from receipt of an order to shipment date and installation vary widely and are determined by a number of factors, including the terms of the customer contract and the customer's deployment plan. There may also be product redesign or modification


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requirements that must be satisfied prior to shipment of units under certain of our agreements. If the redesigns or modifications are not completed, some or all of our orders may not ship or convert to revenue. We also have publicly discussed anticipated, pending orders with prospective customers; however, those prospective customers may require certain conditions or contingencies to be satisfied prior to issuing a purchase order to us, some of which are outside of our control. Such conditions or contingencies that may be required to be satisfied before we receive a purchase order may include, but are not limited to, successful product demonstrations or field trials. Converting orders into revenue is also dependent upon our customers' ability to obtain financing. Some conditions or contingencies that are out of our control may include, but are not limited to, government tax policy, government funding programs, and government incentive programs. Additionally, some conditions and contingencies may extend for several years. We may have to compensate customers, by either reimbursement, forfeiting portions of associated revenue, or other methods depending on the terms of the customer contract, based on the failure on any of these conditions or contingencies. While not probable, this could have an adverse impact on our revenue and cash flow.

We do not have extensive experience in manufacturing our products and, as a result, may be unable to sustain a profitable commercial market for our new and existing products.

        From 1997 to 2008, we focused primarily on research and development of fuel cell systems. In the latter half of 2008, we shifted our focus to viable commercialization of our fuel cell products. In 2014, we launched a turnkey concept whereby the Company provides the fuel cells, hydrogen storage and distribution, ongoing service, and facilitates delivery of the hydrogen. This broader solution has been the primary impetus in the Company's recent success and growing prospects. While we have been manufacturing our products in small quantities for several years, we do not have extensive experience in mass-manufacturing and marketing our products and services. We do not know whether we will be able to develop efficient, low-cost manufacturing capabilities and processes that will enable us to manufacture our products in commercial quantities while meeting the quality, price, engineering, design, and production standards required to profitably market our products. If we are unable to develop the sustainable manufacturing competencies to support the commercial market for our products, the failure would have a material adverse effect on our business, prospects, financial condition and results of operations.

We may be unable to establish or maintain relationships with third parties for certain aspects of continued product development, manufacturing, distribution and servicing and the supply of key components for our products.

        We may need to maintain and may need to enter into additional strategic relationships in order to complete our current product development and commercialization plans. We may also require partners to assist in the sale, servicing and supply of components for our current products and anticipated products, which are in development. If we are unable to identify, enter into, and maintain satisfactory agreements with potential partners, including those relating to the supply, distribution, service and support of our current products and anticipated products, we may not be able to complete our product development and commercialization plans on schedule or at all. We may also need to scale back these plans in the absence of needed partners, which could adversely affect our future prospects for development and commercialization of future products. In addition, any arrangement with a strategic partner may require us to issue a significant amount of equity securities to the partner, provide the partner with representation on our board of directors and/or commit significant financial resources to fund our product development efforts in exchange for their assistance or the contribution to us of intellectual property. Any such issuance of equity securities would reduce the percentage ownership of our then current stockholders. While we have entered into relationships with suppliers of some key components for our products, we do not know when or whether we will secure supply relationships for all required components and subsystems for our products, or whether such relationships will be on


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terms that will allow us to achieve our objectives. Our business prospects, results of operations and financial condition could be harmed if we fail to secure relationships with entities which can develop or supply the required components for our products and provide the required distribution and servicing support. Additionally, the agreements governing our current relationships allow for termination by our partners under certain circumstances, some of which are beyond our control. If any of our current strategic partners were to terminate any of its agreements with us, there could be a material adverse impact on the continued development and profitable commercialization of our products and the operation of our business, financial condition, results of operations and prospects.

Failure of our prospective customer demonstrations could negatively impact demand for our products.

        We conduct demonstrations with a number of our prospective customers, and we plan to conduct additional demonstrations for prospective customers as required in the future. We may encounter problems and delays during these demonstrations for a number of reasons, including the failure of our technology or the technology of third parties, as well as our failure to maintain and service our products properly. Many of these potential problems and delays are beyond our control. Any problem or perceived problem with our demonstrations with these prospective customers could materially harm our reputation and impair market acceptance of, and demand for, our products.

We may enter into contracts for products that have not yet been developed or produced, which may give such customers the right to terminate their agreements with us.

        Periodically, we may enter into contracts with our customers for certain products that have not been developed or produced. There can be no assurance that we will complete the development of these products and meet the specifications required to fulfill customer agreements and deliver products on schedule. Pursuant to such agreements, the customers would have the right to provide notice to us if, in their good faith judgment, we have materially deviated from such agreements. Should a customer provide such notice, and we cannot mutually agree to a modification to the agreement, then the customer may have the right to terminate the agreement, which could adversely affect our future business.

We may never complete the research and development of certain commercially viable products, which may adversely affect our revenue, profitability and result in possible warranty claims.

        Other than our current products, which we believe to be commercially viable at this time, we do not know when or whether we will successfully complete research and development of other commercially viable products that could be critical to our future. If we are unable to develop additional commercially viable products, we may not be able to generate sufficient revenue to become profitable. The profitable commercialization of our products depends on our ability to reduce the costs of our components and subsystems, and we cannot assure you that we will be able to sufficiently reduce these costs. In addition, the profitable commercialization of our products requires achievement and verification of their overall reliability, efficiency and safety targets, and we cannot assure you that we will be able to develop, acquire or license the technology necessary to achieve these targets. We must complete additional research and development to fill our product portfolios and deliver enhanced functionality and reliability in order to manufacture additional commercially viable products in commercial quantities. In addition, while we are conducting tests to predict the overall life of our products, we may not have run our products over their projected useful life prior to large-scale commercialization. As a result, we cannot be sure that our products will last as long as predicted, resulting in possible warranty claims and commercial failures.


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We must keep up with rapidcompanies, technological change, to remain competitive in a rapidly evolving industry.

        Our market is characterized by rapid technological change and evolving industry standards. Our future success will depend on our ability to adapt quickly to rapidly changing technologies, to adapt our services and products to evolving industry standards and to improve the performance and reliability of our services and products. To achieve market acceptance for our products, we must effectively anticipate and offer products that meet changing customer demands in a timely manner. If we fail to develop products that satisfy customer preferences in a timely and cost-effective manner, our ability to renew our contracts with existing customers and our ability to create or increase demand for our products will be harmed.

Certain component quality issues have resulted in adjustments to our warranty reserves and the accrual for loss contracts, which negatively impacted our results, and unanticipated future product reliability and quality issues could impair our ability to service long-term warranty and maintenance contracts profitably.

        Quality issues have arisen with respect to certain components in certain products that are currently being used at customer sites. The product and service revenue contracts we entered into generally represent either extended maintenance contracts or include a one-to-two-year product warranty to customers from date of installation. Currently 84% of our fuel cells deployed are under extended maintenance and only 3% of our fuel cells deployed are still under standard warranty. We have had to retrofit units subject to component quality issues with replacement components that will improve the reliability of our products for our customers. As a result, we recorded a provision for loss contracts related to service in the fourth quarter of 2015 for $10.1 million. If any unanticipated additional quality issues or warranty claims arise, additional material charges may be incurred in the future. We continue to work with our vendors on these component issues to recover charges taken and improve quality and reliability of components to prevent a reoccurrence of the isolated quality issues we have experienced. Quality issues also could cause profitable maintenance contracts to become unprofitable. When applicable, we are required to recognize such losses once identified. We will continue to evaluate our contracts for potential adjustments to our accruals in the future.

        In addition, from time to time the Company experiences other unexpected design or product performance issues. The Company makes significant investment in the continued improvement of our products and maintains appropriate warranty reserves for known and unexpected issues; however, unknown malfunctions or design defects could result in unexpected material liabilities and could adversely affect our business, financial condition, results of operation, cash flows and prospects. In addition, a well-publicized actual or perceived problem could adversely affect the market's perception of our products resulting in a decline in demand for our products and could divert the attention of our management, which may materially and adversely affect our business, financial condition, results of operations, cash flows and prospects.

Our future plans could be harmed if we are unable to attract or retain key personnel.

        We have attracted a highly skilledcrisis management, team building and specialized workforce, including scientists, engineers, researchers, manufacturing, marketing and sales professionals. Our future success will depend, in part, on our ability to attract and retain qualified management and technical personnel. We do not know whether we will be successful in hiring or retaining qualified personnel. Our inability to hire qualified personnel on a timely basis, or the departure of key employees, could materially and adversely affect our development and profitable commercialization plans and, therefore, our business prospects, results of operations and financial condition.


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Our stock price and stock trading volume has been and could remain volatile, which could further adversely affect the market price of our stock, our ability to raise additional capital and/or cause us to be subject to securities class action litigation.

        The market price of our common stock has historically experienced and may continue to experience significant volatility. In 2015, the sales price of our common stock fluctuated from a high of $3.38 per share to a low of $1.56 per share. Our progress in developing and commercializing our products, our quarterly operating results, announcements of new products by us or our competitors, our perceived prospects, changes in securities' analysts' recommendations or earnings estimates, changes in general conditions in the economy or the financial markets, adverse events related to our strategic relationships, significant sales of our common stock by existing stockholders, including one or more of our strategic partners, and other developments affecting us or our competitors could cause the market price of our common stock to fluctuate substantially. In addition, in recent years, the stock market has experienced significant price and volume fluctuations. This volatility has affected the market prices of securities issued by many companies for reasons unrelated to their operating performance and may adversely affect the price of our common stock. Such market price volatility could adversely affect our ability to raise additional capital. In addition, we may be subject to additional securities class action litigation as a result of volatility in the price of our common stock, which could result in substantial costs and diversion of management's attention and resources and could harm our stock price, business, prospects, results of operations and financial condition.

        Sales of a substantial number of shares of our common stock in the public market could occur at any time. These sales, or the market perception that the holders of a large number of shares intend to sell shares, could reduce the market price of our common stock.

        Additionally, market conditions may result in volatility in the level of, and fluctuations in, the market prices of stocks generally and, in turn, our common stock and sales of substantial amounts of our common stock in the market, in each case being unrelated or disproportionate to changes in our operating performance.

If securities or industry analysts do not publish, or cease publishing, research or reports about us, our business or our market, or if they change their recommendations regarding our stock adversely, our stock price and trading volume could decline.

        The trading market for our common stock will be influenced by the research and reports that industry or securities analysts may publish about us, our business, our market or our competitors. If any of the analysts who may cover us change their recommendation regarding our stock adversely, or provide more favorable relative recommendations about our competitors, our stock price would likely decline. If any analyst who may cover us were to cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

We face risks associated with our plans to market, distribute and service our products and services internationally.

        We have begun to market, distribute, sell and service our product offerings internationally. We have limited experience operating internationally, including developing and manufacturing our products to comply with the commercial and legal requirements of international markets. Our success in international markets will depend, in part, on our ability and that of our partners to secure relationships with foreign sub-distributors, and our ability to manufacture products that meet foreign regulatory and commercial requirements. Additionally, our planned international operations are subject to other inherent risks, including potential difficulties in enforcing contractual obligations and intellectual property rights in foreign countries and fluctuations in currency exchange rates. Also, to the


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extent our operations and assets are located in foreign countries, they are potentially subject to nationalization actions over which we will have no control.

        For example, we operate in France under the name HyPulsion to develop and sell hydrogen fuel cell systems for the European material handling market. However, for the reasons discussed above, HyPulsion may not be able to accomplish its goals or become profitable.

        Doing business in foreign markets requires us to be able to respond to rapid changes in market, legal, and political conditions in these countries. As we expand in international markets, we may face numerous challenges, including unexpected changes in regulatory requirements, potential conflicts or disputes that countries may have to deal with, fluctuations in currency exchange rates, longer accounts receivable requirements and collections, difficulties in managing international operations, potentially adverse tax consequences, restrictions on repatriation of earnings and the burdens of complying with a wide variety of international laws. Any of these factors could adversely affect our results of operations and financial condition. The success of our international expansion will depend, in part, on our ability to succeed in differing legal, regulatory, economic, social and political environments.

We currently are, and may from time to time become, a named party in contract disputes for which an adverse outcome could result in us incurring significant expenses, being liable for damages and subject to indemnification claims.

        From time to time, we may be subject to contract disputes or litigation. In connection with any disputes or litigation in which we are involved, we may be forced to incur costs and expenses in connection with defending ourselves or in connection with the payment of any settlement or judgment or compliance with any injunctions in connection therewith if there is an unfavorable outcome. The expense of defending litigation may be significant. The amount of time to resolve lawsuits is unpredictable and defending ourselves may divert management's attention from the day-to-day operations of our business, which could adversely affect our business, financial condition, results of operations and cash flows. In addition, an unfavorable outcome in any such litigation could have a material adverse effect on our business, results of operations, financial condition and cash flows.

If we fail to maintain an effective system of internal controls, we may not be able to accurately report our financial results or prevent fraud, which could harm our brand and operating results.

        Effective internal controls over financial reporting are necessary for us to provide reliable and accurate financial reports and effectively prevent fraud. We have devoted significant resources and time to comply with the internal control over financial reporting requirements of the Sarbanes-Oxley Act of 2002. In addition, Section 404 under the Sarbanes-Oxley Act of 2002 requires that we assess the design and operating effectiveness of our controls over financial reporting. We are currently required to have our auditors attest to the effectiveness of our internal control over financial reporting. Our compliance with the annual internal control report requirement will depend on the effectiveness of our financial reporting and data systems and controls. Inferior internal controls increase the possibility of errors and could cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our stock and our access to capital.

        In addition, our internal control systems rely on people trained in the execution of the controls. Loss of these people or our inability to replace them with similarly skilled and trained individuals or new processes in a timely manner could adversely impact our internal control mechanisms.

The requirements of being a public company may strain our resources, divert management's attention and affect our ability to attract and retain qualified board members and officers.

strategy. As a public company we are subjectdirector, Mr. McNamee has led board special committees, chaired audit committees, chaired three boards and has been an active lead director. Mr. McNamee has previously served on public company boards, including Mechanical Technology Inc. (MTI) and Home Shopping Network (HSN). He has been an early stage investor, director and mentor for private companies that subsequently went public including MapInfo (now Pitney Bowes), META Group (now Gartner Group) and iRobot Corporation, where he served as a director from 1999 to 2016 and as lead director for the reporting requirementslast 11 of those years. He served as a NYSE director from 1999 to 2004 and chaired its foundation. In the aftermath of the Securities Exchange Act1987 stock market crash, he chaired the Group of 1934 (the Exchange Act),Thirty Committee to reform the listing requirementsClearance and Settlement System. Mr. McNamee has been active as a director or trustee of civic organizations including The Albany Academies and Albany Medical Center, whose Finance Committee he chaired for a dozen years. He is also a director of several private companies, a Sterling Fellow of Yale University and a Trustee of The American Friends of Eton College. He conceived and co-authored the Tales of the NASDAQ Global Market and other


TableHoffman, which sold over 200,000 copies.  He received his Bachelor of Contents

applicable securities rules and regulations. Compliance with these rules and regulations increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly and increase demandArts degree from Yale University. We believe Mr. McNamee’s qualifications to sit on our systemsBoard of Directors include his experience serving on countless boards, his background in investment banking and resources. The Exchange Act requires, among other things, that we file annual, quarterlyexperience with the financial sector and current reportsits regulatory bodies.

Johannes M. Roth has been a director since April 2013. Mr. Roth is the founder and, since 2006, has been Managing Director and Chairman of FiveT Capital Holding AG, an investment holding company based in Switzerland with respectbusinesses specializing in asset management, risk management and alternative investments. Since 2006, Mr. Roth has been a board member of FiveT Capital AG, Zürich, Switzerland, which advises several long-only funds and operates an asset management business for high net-worth individuals. We believe Mr. Roth’s qualifications to sit on our businessBoard of Directors include his background in financial investments, financial and operating resultsrisk management and maintain effective disclosure controls and procedures and internal control over financial reporting. To maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this requirement, significant resources andequity capital markets as well as his experience in management oversight may be necessary.

Provisions in our charter documents and Delaware law may discourage or delay an acquisition that stockholders may consider favorable, which could decrease the value of our common stock.positions.

 Our certificate

Xavier Pontone has been a director since October 2013. Since 2015, Mr. Pontone has been Vice President of incorporation, our bylaws,Air Liquide Advanced Business and Delaware corporate law contain provisions that could make it harderTechnologies Europe, which develops new areas of growth for the Air Liquide Group.  Mr. Pontone is the Managing Director of Air Liquide Advanced Businesses based in Sassenage, France, since 2013.  He acts as Chairman of Fordonsgas AB, which is a third party to acquire us withoutcompany operating bio methane fueling stations in Sweden since 2014.  He is also Chairman of Copenhagen Hydrogen Newwork A/S, which is a company operating hydrogen fueling stations in Denmark since 2014.   Mr. Pontone sat on the consent of our board of directors. These provisions include those that: authorize the issuance of up to 5,000,000 shares of preferred stock in one or more series without a stockholder vote; limit stockholders' ability to call special meetings; establish advance notice requirements for nominations for election to our board of directors or for proposing matters that can be acted on by stockholders at stockholder meetings; and provide for staggered terms for our directors. We have a shareholders rights plan that may be triggered if a person or group of affiliated or associated persons acquires beneficial ownership of 15% or more ofHypulsion, the outstanding shares of our common stock. In addition, in certain circumstances, Delaware law also imposes restrictions on mergers and other business combinations between us and any holder of 15% or more of our outstanding common stock.

Adverse changes in general economic conditions in the United States or any of the major countries in which we do business could adversely affect our operating results.

        We are subject to the risks arising from adverse changes in global economic conditions. If economic growth in the United States and other countries slows or recedes, our current or prospective customers may delay or reduce technology purchases. This could result in reductions in sales of our products, longer sales cycles, slower adoption of new technologies and increased price competition, which could materially and adversely affect our business, results of operations and financial condition.

Our business may become subject to future government regulation, which may impact our ability to market our products and costs and price of our products.

        Our products are subject to certain federal, local, and non-U.S. laws and regulations, including, for example, state and local ordinances relating to building codes, public safety, electrical and gas pipeline connections, hydrogen transportation and siting and related matters. See "Business—Government Regulations" for additional information. Further, as products are introduced into the market commercially, governments may impose new regulations. We do not know the extent to which any such regulations may impact our ability to manufacture, distribute, install and service our products. Any regulation of our products, whether at the federal, state, local or foreign level, including any regulations relating to the production, operation, installation, and servicing of our products may increase our costs and the price of our products.

We are increasingly dependent on technology in our operations and, if our technology fails, our business could be adversely affected.

        We may experience problems with the operation of our current information technology systems or the technology systems of third parties on which we rely, as well as the development and deployment of new information technology systems, that could adversely affect, or even temporarily disrupt, all or a portion of our operations until resolved. Inabilities and delays in implementing new systems can also


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affect our ability to realize projected or expected cost savings. Despite the implementation of network security measures, our information technology could be penetrated by outside parties (such as computer hackers or cyber terrorists) intent on extracting information, corrupting information or disrupting business processes. Such unauthorized access could disrupt our business and could result in a loss of assets or reputational damage. Additionally, any systems failures could impede our ability to timely collect and report financial results in accordance with applicable laws.

Our products use flammable fuels that are inherently dangerous substances.

        Our fuel cell systems use natural gas and hydrogen gas in catalytic reactions. While our products do not use this fuel in a combustion process, natural gas and hydrogen gas are flammable fuels that could leak and combust if ignited by another source. Further, while we are not aware of any significant accidents involving our products, any such accidents involving our products or other products using similar flammable fuels could materially suppress demand for, or heighten regulatory scrutiny of, our products.

        The risk of product liability claims and associated adverse publicity is inherent in the development, manufacturing, marketing and sale of fuel cell products, including products fueled by hydrogen, a flammable gas. Any liability for damages resulting from malfunctions or design defects could be substantial and could materially adversely affect our business, financial condition, results of operations and prospects. In addition, a well-publicized actual or perceived problem could adversely affect the market's perception of our products resulting in a decline in demand for our products and could divert the attention of our management, which may materially and adversely affect our business, financial condition, results of operations and prospects.

We may not be able to protect important intellectual property and we could incur substantial costs defending against claims that our products infringe on the proprietary rights of others.

        PEM fuel cell technology was first developed in the 1950s, and fuel processing technology has been practiced on a large scale in the petrochemical industry for decades. Accordingly, we do not believe that we can establish a significant proprietary position in the fundamental component technologies in these areas. However, our ability to compete effectively will depend, in part, on our ability to protect our proprietary system-level technologies, systems designs and manufacturing processes. We rely on patents, trademarks, and other policies and procedures related to confidentiality to protect our intellectual property. However, some of our intellectual property is not covered by any patent or patent application. Moreover, we do not know whether any of our pending patent applications will issue or, in the case of patents issued or to be issued, that the claims allowed are or will be sufficiently broad to protect our technology or processes. Even if all of our patent applications are issued and are sufficiently broad, our patents may be challenged or invalidated. We could incur substantial costs in prosecuting or defending patent infringement suits or otherwise protecting our intellectual property rights. While we have attempted to safeguard and maintain our proprietary rights, we do not know whether we have been or will be completely successful in doing so. Moreover, patent applications filed in foreign countries may be subject to laws, rules and procedures that are substantially different from those of the United States, and any resulting foreign patents may be difficult and expensive to obtain and enforce. In addition, we do not know whether the U.S. Patent & Trademark Office will grant federal registrations based on our pending trademark applications. Even if federal registrations are granted to us, our trademark rights may be challenged. It is also possible that our competitors or others will adopt trademarks similar to ours, thus impeding our ability to build brand identity and possibly leading to customer confusion. We could incur substantial costs in prosecuting or defending trademark infringement suits.

        Further, our competitors may independently develop or patent technologies or processes that are substantially equivalent or superior to ours. If we are found to be infringing third party patents, we


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could be required to pay substantial royalties and/or damages, and we do not know whether we will be able to obtain licenses to use such patents on acceptable terms, if at all. Failure to obtain needed licenses could delay or prevent the development, manufacture or sale of our products, and could necessitate the expenditure of significant resources to develop or acquire non-infringing intellectual property.

Asserting, defending and maintaining our intellectual property rights could be difficult and costly and failure to do so may diminish our ability to compete effectively and may harm our operating results.

        We may need to pursue lawsuits or legal action in the future to enforce our intellectual property rights, to protect our trade secrets and domain names, and to determine the validity and scope of the proprietary rights of others. If third parties prepare and file applications for trademarks used or registered by us, we may oppose those applications and be required to participate in proceedings to determine the priority of rights to the trademark. Similarly, competitors may have filed applications for patents, may have received patents and may obtain additional patents and proprietary rights relating to products or technology that block or compete with ours. We may have to participate in interference proceedings to determine the priority of invention and the right to a patent for the technology. Litigation and interference proceedings, even if they are successful, are expensive to pursue and time consuming, and we could use a substantial amount of our management and financial resources in either case.

We rely, in part, on contractual provisions to protect our trade secrets and proprietary knowledge, the adequacy of which may not be sufficient.

        Confidentiality agreements to which we are party may be breached, and we may not have adequate remedies for any breach. Our trade secrets may also be known without breach of such agreements or may be independently developed by competitors. Our inability to maintain the proprietary nature of our technology and processes could allow our competitors to limit or eliminate any competitive advantages we may have.

Potential future acquisitions could be difficult to integrate, divert the attention of key personnel, disrupt our business and impair our financial results.

        As part of our business strategy, we intend to consider acquisitions of companies, technologies and products that we believe could improve our ability to compete in our core markets or allow us to enter new markets. Acquisitions, involve numerous risks, any of which could harm our business, including, difficulty in integrating the technologies, products, operations and existing contracts of a target company and realizing the anticipated benefits of the combined businesses; difficulty in supporting and transitioning customers, if any, of the target company; inability to achieve anticipated synergies or increase the revenue and profit of the acquired business; potential disruption of our ongoing business and distraction of management; the price we pay or other resources that we devote may exceed the value we realize; or the value we could have realized if we had allocated the purchase price or other resources to another opportunity and inability to generate sufficient revenue to offset acquisition costs. In addition, if we finance acquisitions by issuing equity securities, our existing stockholders may be diluted. As a result, if we fail to properly evaluate acquisitions or investments, we may not achieve the anticipated benefits of any such acquisitions, and we may incur costs in excess of what we anticipate.

Item 1B.    Unresolved Staff Comments

        There are no unresolved comments regarding our periodic or current reports from the staff of the SEC that were issued 180 days or more preceding the end of our year ended December 31, 2015.


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Item 2.    Properties

        Our principal offices are located in Latham, New York. We lease a 140,000 square foot facility that includes our general office building, our manufacturing facility, and our research and development center. In addition, we lease a 29,200 square foot facility in Spokane, Washington that includes an office building and a manufacturing facility. See note 16, Commitments and Contingencies of the Consolidated Financial Statements, Part II, Item 8 of this Form 10-K for further discussion of the leases. We believe that our facilities are sufficient to accommodate our anticipated production volumes for at least the next two years.

Item 3.    Legal Proceedings

        An action has been brought in New York State Supreme Court by General Electric Co. (GE) and an affiliate against the Company seeking $1 million that GE claims is due under an indemnification agreement between GE and the Company. GE seeks indemnification for funds it paid to settle a claim with Soroof Trading Development Co., an entity that had paid funds to GE to become a distributor of the Company's products. The Company is vigorously defending the action.

Item 4.    Mine Safety Disclosures

        Not applicable.


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PART II

Item 5.    Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

        During the year ended December 31, 2014, we issued 74,863 shares of our common stock in connection with matching contributions under our 401(k) Savings & Retirement Plan. We did not issue any shares in 2015. The issuance of these shares is exempt from registration under Section 3(a)(2) of the Securities Act of 1933, as amended.

        Market Information.    Our common stock is traded on the NASDAQ Capital Market under the symbol "PLUG." As of March 7, 2016, there were approximately 615 record holders of our common stock. However, management believes that a significant number of shares are held by brokers under a "nominee name" and that the number of beneficial shareholders of our common stock exceeds 100,942. The following table sets forth the high and low sale price per share of our common stock as reported by the NASDAQ Capital Market for the periods indicated:

 
 Sales prices 
 
 High Low 

2015

       

1st Quarter

 $3.38 $2.42 

2nd Quarter

 $2.85 $2.32 

3rd Quarter

 $2.85 $1.56 

4th Quarter

 $2.98 $1.76 

2014

  
 
  
 
 

1st Quarter

 $11.72 $1.89 

2nd Quarter

 $8.37 $3.62 

3rd Quarter

 $6.47 $4.00 

4th Quarter

 $5.48 $2.60 

        Dividend Policy.    We have never declared or paid cash dividends on our common stock and do not anticipate paying cash dividends in the foreseeable future. Any future determination as to the payment of dividends will depend upon capital requirements and limitations imposed by our credit agreements, if any, and such other factors as our board of directors may consider.


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        Five-Year Performance Graph.    Below is a line graph comparing the percentage change in the cumulative total return of the Company's common stock, based on the market price of the Company's common stock, with the total return of companies included within the NASDAQ Clean Edge Green Energy Index (CELS) and the companies included within the Russell 2000 Index (RUT) for the period commencing December 31, 2010 and ending December 31, 2015. The Company has elected to replace the NASDAQ Market Index (NQUSBT) and the Russell 3000 Technology Index with the NASDAQ Clean Edge Green Energy Index (CELS) and the Russell 2000 Index (RUT), respectively, as these indexes are more representative of companies with market capitalizations that are comparable to the Company's. In this year of transition, we have also presented the total returns of the NASDAQ Market Index (NQUSBT). With respect to the Russell 3000 Technology Index, total returns for 2015 were not presented as that information is no longer available. The calculation of the cumulative total return assumes a $100 investment in the Company's common stock, the NASDAQ Clean Edge Green Energy Index (CELS), the Russell 2000 Index (RUT), the NASDAQ Market Index (NQUSBT), and the Russell 3000 Technology Index on December 31, 2010 and the reinvestment of all dividends, if any.

Index
 2010 2011 2012 2013 2014 2015 

Plug Power Inc. 

 $100.00 $55.14 $13.51 $41.89 $81.08 $57.03 

NASDAQ Clean Edge Green Energy Index

 $100.00 $59.53 $58.57 $107.74 $104.75 $94.72 

Russell 2000 Index

 $100.00 $94.60 $107.03 $146.24 $152.48 $142.91 

NASDAQ Market Index (NQUSBT)

 $100.00 $100.31 $116.79 $155.90 $175.33 $176.17 

Russell 3000 Technology Index

 $100.00 $98.70 $109.39 $138.39 $162.76    

        See also Part III Item 12 in this Annual Report on Form 10-K for additional detail related to security ownership and related stockholder matters, and for additional detail on equity compensation plan matters.


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Item 6.    Selected Financial Data

        The following tables set forth selected financial data and other operating information of the Company. The selected statement of operations and balance sheet data for 2015, 2014, 2013, 2012, and 2011, as set forth below are derived from the audited Consolidated Financial Statements of the Company. The information is only a summary and you should read it in conjunction with the Company's audited Consolidated Financial Statements and related notes and other financial information included herein and "Management's Discussion and Analysis of Financial Condition and Results of Operations."

 
 Years Ended December 31, 
 
 2015 2014 2013 2012 2011 
 
 (in thousands, except share and per share data)
 

Statements Of Operations:

                

Revenue:

                

Sales of fuel cell systems and related infrastructure

  78,002  48,306  18,446  20,792  19,592 

Services performed on fuel cell systems and related infrastructure

  14,012  9,909  6,659  3,615  3,631 

Power Purchase Agreements

  5,718  2,137       

Fuel delivered to customers

  5,075  1,959       

Other

  481  1,919  1,496  1,701  4,403 

Total revenue

  103,288  64,230  26,601  26,108  27,626 

Cost of revenue:

                

Sales of fuel cell systems and related infrastructure

  67,703  43,378  20,414  25,354  22,626 

Services performed on fuel cell systems and related infrastructure

  22,937  19,256  14,929  12,304  8,044 

Provision for loss contracts related to service

  10,050         

Power Purchase Agreements

  5,253  1,052       

Fuel delivered to customers

  6,695  2,204       

Other

  540  3,202  2,506  2,805  6,232 

Total cost of revenue

  113,178  69,092  37,849  40,463  36,902 

Gross loss

 $(9,890)$(4,862)$(11,248)$(14,355)$(9,276)

Research and development expense

  14,948  6,469  3,121  5,434  5,656 

Selling, general and administrative expenses

  34,164  26,601  14,596  16,883  16,868 

Gain on sale of assets

          (673)

Other income (expense), net

  3,312  (50,881) (34,115) 4,810  3,673 

Loss before income taxes

 $(55,690)$(88,813)$(63,080)$(31,862)$(27,454)

Income tax benefit

    325  410     

Net loss attributable to the Company

 $(55,690)$(88,488)$(62,670)$(31,862)$(27,454)

Preferred stock dividends declared

  (105) (156) (121)    

Net loss attributable to common shareholders

 $(55,795)$(88,644)$(62,791)$(31,862)$(27,454)

Loss per share, basic and diluted

 $(0.32)$(0.56)$(0.82)$(0.93)$(1.46)

Weighted average number of common shares outstanding

  176,067,231  159,228,815  76,436,408  34,376,427  18,778,066 

Balance Sheet Data:

                

(at end of the period)

                

Unrestricted cash, cash equivalents and available-for-sale securities

 $63,961 $146,205 $5,027 $9,380 $13,857 

Total assets

  209,456  204,151  35,356  39,460  55,656 

Borrowings under line of credit

        3,381  5,405 

Noncurrent liabilities

  40,861  19,008  39,983  7,390  9,577 

Stockholders' equity (deficit)

  124,736  158,283  (17,872) 15,030  29,036 

Working capital

  88,524  167,039  11,110  6,901  22,452 

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Item 7.    Management's Discussion and Analysis of Financial Condition and Results of Operations

        The discussion contained in this Form 10-K contains "forward-looking statements," within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act, that involve risks and uncertainties. Our actual results could differ materially from those discussed in this Form 10-K. In evaluating these statements, you should review Part I, Item 1A: Risk Factors and our Consolidated Financial Statements and notes thereto included in Part II, Item 8: Financial Statements and Supplementary Data of this Form 10-K.

        Plug Power Inc., or the Company, is a leading provider of alternative energy technology focused on the design, development, commercialization and manufacture of hydrogen fuel cell systems used primarily for the material handling and stationary power market.

        We are focused on proton exchange membrane, or PEM, fuel cell and fuel processing technologies, fuel cell/battery hybrid technologies, and associated hydrogen storage and dispensing infrastructure from which multiple products are available. A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity and heat without combustion. Hydrogen is derived from hydrocarbon fuels such as liquid petroleum gas, or LPG, natural gas, propane, methanol, ethanol, gasoline or biofuels. Plug Power develops complete hydrogen delivery, storage and refueling solutions for customer locations. Hydrogen can also be obtained from the electrolysis of water, or produced on-site at consumer locations through a process known as reformation. Currently, the Company obtains hydrogen by purchasing it from fuel suppliers.

        We concentrate our efforts on developing, manufacturing and selling our hydrogen products and services on commercial terms for material handling applications, with a focus on multi-shift high volume manufacturing and high throughput distribution sites.

        On March 2, 2016, the Company, together with its subsidiaries Emerging Power Inc. and Emergent Power Inc. (Loan Parties), entered into a Loan Agreement with Generate Lending, LLC (Lender). See the Liquidity and Capital Resources section for a summary of key terms of the agreement.


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        Revenue, cost of revenue, gross profit/(loss) and gross margin for the years ended December 31, 2015, 2014, and 2013, was as follows (in thousands):

 
 Revenue Cost of
Revenue
 Gross
Profit/(Loss)
 Gross
Margin
 

For the year ended December 31, 2015:

             

Sales of fuel cell systems and related infrastructure

 $78,002 $67,703 $10,299  13.2%

Services performed on fuel cell systems and related infrastructure

  14,012  22,937  (8,925) –63.7%

Power Purchase Agreements

  5,718  5,253  465  8.1%

Fuel delivered to customers

  5,075  6,695  (1,620) –31.9%

Other

  481  540  (59) –12.3%

Provision for loss contracts related to service

    10,050  (10,050)   

Total

 $103,288 $113,178 $(9,890) –9.6%

For the year ended December 31, 2014:

             

Sales of fuel cell systems and related infrastructure

 $48,306 $43,378 $4,928  10.2%

Services performed on fuel cell systems and related infrastructure

  9,909  19,256  (9,347) –94.3%

Power Purchase Agreements

  2,137  1,052  1,085  50.8%

Fuel delivered to customers

  1,959  2,204  (245) –12.5%

Other

  1,919  3,202  (1,283) –66.9%

Total

 $64,230 $69,092 $(4,862) –7.6%

For the year ended December 31, 2013:

             

Sales of fuel cell systems and related infrastructure

 $18,446 $20,414 $(1,968) –10.7%

Services performed on fuel cell systems and related infrastructure

  6,659  14,929  (8,270) –124.2%

Other

  1,496  2,506  (1,010) –67.5%

Total

 $26,601 $37,849 $(11,248) –42.3%

        Our primary sources of revenue are from sales of fuel cell systems and related infrastructure, services performed on fuel cell systems and related infrastructure, Power Purchase Agreements, and fuel delivered to customers. Revenue from sales of fuel cell systems and related infrastructure represents sales of our GenDrive units, ReliOn stationary backup power units, as well as hydrogen fueling infrastructures. Revenue from services performed on fuel cell systems and related infrastructure represents revenue earned on our service and maintenance contracts and sales of spare parts. Revenue from Power Purchase Agreements represents payments received from customers for leased units. All leased units are associated with sale/leaseback transactions in which the Company sells fuel cell systems and related infrastructure to a third-party, leases them back and provides them to customers who are parties to Power Purchase Agreements with the Company. Revenue associated with fuel delivered to customers represents the sale of hydrogen to customers that has been purchased by the Company from a third party. As part of the GenKey solution, the Company contracts with fuel suppliers to purchase liquid hydrogen, which is then sold to its customers.

        Revenue—sales of fuel cell systems and related infrastructure.    Revenue from sales of fuel cell systems and related infrastructure represents revenue from the sale of our fuel cells, such as GenDrive units and ReliOn's stationary backup power units, as well as hydrogen fueling infrastructure referred to at the site level as hydrogen installations.


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        Revenue from sales of fuel cell systems and related infrastructure for the year ended December 31, 2015 increased $29.7 million or 61.5%, to $78.0 million from $48.3 million for the year ended December 31, 2014. The most significant factor driving the increase was the Company's continued refinement of its full turn-key solution (GenKey). By investing in its sales team, the Company has been able to better penetrate anchor customers and reach new customers in subsectors where it already has a presence (automobile manufacturers, retail distribution, and grocery distribution). There were 3,431 GenDrive units shipped for the year ended December 31, 2015 as compared to 2,406 GenDrive units shipped for the year ended December 31, 2014. GenDrive units shipped in 2015 were predominantly associated with the GenKey solution. Sales were associated with hydrogen installations at 18 sites in 2015, compared to 11 in 2014. Excluded from revenue is approximately $3.6 million of profit associated with sale/leaseback transactions which has been included within deferred revenue on the consolidated balance sheet at December 31, 2015.

        Revenue from sales of fuel cell systems and related infrastructure for the year ended December 31, 2014 increased $29.9 million or 161.9%, to $48.3 million from $18.4 million for the year ended December 31, 2013. The most significant factor driving this increase was the Company's introduction of the full turn-key solution. In providing the full solution of units, hydrogen storage and distribution, uptime service, and hydrogen delivery, the Company made it significantly easier for customers to adopt the technology and more immediately realize the productivity benefits. There were 2,406 GenDrive units shipped during the year ended December 31, 2014 as compared to 918 GenDrive units shipped during the year ended December 31, 2013. GenDrive units shipped in 2014 were predominantly associated with the full turn-key solution. Also stemming primarily from the new turn-key offering, the Company recognized revenue from hydrogen installations at 11 sites. There were no hydrogen installations during 2013. The overall increase in product revenue is also due in part to stationary backup product revenue of $1.9 million stemming from the acquisition of ReliOn early in 2014.

        Revenue—services performed on fuel cell systems and related infrastructure.    Revenue from services performed on fuel cell systems and related infrastructure represents revenue earned on our service and maintenance contracts and sales of spare parts.

        Revenue from services performed on fuel cell systems and related infrastructure for the year ended December 31, 2015 increased $4.1 million or 41.4%, to $14.0 million from $9.9 million for the year ended December 31, 2014. The increase in this revenue category is primarily related to the Company's increase in sales of fuel cell systems and hydrogen installations in recent years, which has had a corresponding impact on the installed base. At December 31, 2015, there were 8,655 fuel cell units under extended maintenance contracts, an increase of 68% from 5,163 in 2014. Revenue did not increase as much as installed base due to the large concentration of units at customer locations. This leverage impacts pricing strategy. Also, at December 31, 2015, there were extended maintenance contracts associated with 23 hydrogen installations, as compared to eight at December 31, 2014.

        Revenue from services performed on fuel cell systems and related infrastructure for the year ended December 31, 2014 increased $3.3 million or 48.8%, to $9.9 million from $6.7 million for the year ended December 31, 2013. As with product revenue, the increase in service revenue is primarily related to the Company's introduction of the turn-key solution in 2014. In addition, the revenue increase stems from incremental GenFuel and GenCare contracts as our customer base grows and requires additional uptime maintenance. Lastly, revenue increased due to service revenue of $1.5 million stemming from the acquisition of ReliOn early in 2014.

        Revenue—Power Purchase Agreements.    Revenue from Power Purchase Agreements represents payments received from customers for power generated via the provision of equipment and service. The equipment and service are associated with sale/leaseback transactions in which the Company sells fuel cell systems and related infrastructure to a third-party, leases them back and operates them at customers' locations who are parties to Power Purchase Agreements with the Company.


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        Power Purchase Agreements for the year ended December 31, 2015 increased $3.6 million or 167.6%, to $5.7 million from $2.1 million for the year ended December 31, 2014. The increase is due to the increased numbers of sites the Company has deployed with these types of arrangements (14 in 2015 as compared to four in 2014). The Power Purchase Agreement sales model was primarily launched in the second half of 2014. There were no Power Purchase Agreements entered into during 2013.

        Revenue—fuel delivered to customers.    Revenue associated with fuel delivered to customers represents the sale of hydrogen to customers that has been purchased by the Company from a third party. As part of the GenKey solution, the Company contracts with fuel suppliers to purchase liquid hydrogen, which is then sold to its customers.

        Revenue associated with fuel delivered to customers for the year ended December 31, 2015 increased $3.1 million or 159.1%, to $5.1 million from $2.0 million for the year ended December 31, 2014. The increase in revenue is due to an increase of 15 additional sites taking fuel deliveries in 2015 (22 sites), compared to 2014 (seven sites). The sites generally are the same as those who had purchased hydrogen installations within the GenKey solution. The Company began selling hydrogen to customers during the second half of 2014.

        Revenue—other.    Other revenue primarily represents cost reimbursement research and development contracts associated with the development of PEM fuel cell technology. We generally share in the cost of these programs with our cost-sharing percentages ranging from 30% to 50% of total project costs. Revenue from time and material contracts is recognized on the basis of hours expended plus other reimbursable contract costs incurred during the period. We expect to continue certain research and development contract work that is related to our current product development efforts. Other miscellaneous revenue is recognized from time to time.

        Other revenue for the year ended December 31, 2015 decreased $1.4 million, or 74.9%, to $0.5 million from $1.9 million for the year ended December 31, 2014. The Company had been working on a U.S. government-related research and development contract primarily in 2014, which had lower costs (and therefore associated revenues) carry over into 2015. During 2015, the Company also recorded $0.1 million in technology access fees from a customer related to stacks being developed internally.

        Other revenue for the year ended December 31, 2014 increased $0.4 million, or 28.3%, to $1.9 million from $1.5 million for the year ended December 31, 2013. The increase is primarily related to increased activity on a U.S. government-related research and development contract.

        Cost of revenue—sales of fuel cell systems and related infrastructure.    Cost of revenue from sales of fuel cell systems and related infrastructure includes direct material, labor costs, and allocated overhead costs related to the manufacture of our fuel cells such as GenDrive units and ReliOn's stationary backup power units, as well as hydrogen fueling infrastructure referred to at the site level as hydrogen installations.

        Cost of revenue from sales of fuel cell systems and related infrastructure for the year ended December 31, 2015 increased $24.3 million, or 56.1%, to $67.7 million from $43.4 million for the year ended December 31, 2014. Gross margin generated from sales of fuel cell systems and related infrastructure was 13.2% in 2015 and 10.2% in 2014. Gross margin on GenDrive sales in 2015 was 21.3%, an improvement from 13.7% in 2014. Total costs have increased due to higher volume, however gross margin has improved from better leverage on the fixed cost base, supply chain and product design cost down programs, as well as manufacturing process improvements. Gross margin on hydrogen infrastructure sales in 2015 was (4.4%), an improvement from (7.3%) in 2014. Approximately $2.5 million of the overall increase in costs is also due to the inclusion of ReliOn for a full year as compared to nine months in 2014, which was the year the Company completed the acquisition. Gross


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margin on ReliOn revenues improved to 13.2% in 2015, from 8.3% in 2014, due to cost synergies with the integration of ReliOn operations into the Company.

        Cost of revenue from sales of fuel cell systems and related infrastructure for the year ended December 31, 2014 increased $23.0 million, or 112.5%, to $43.4 million from $20.4 million for the year ended December 31, 2013. Gross margin generated from sales of fuel cell systems and related infrastructure was 10.2% for 2014 and (10.7)% for 2013. Gross margin on GenDrive sales in 2014 was 13.7%, an improvement from (10.7%) in 2013. Although costs overall are higher due to volume, the Company did see gross margin improvement from leverage on the fixed cost base, supply chain and product design cost down programs, as well as manufacturing process improvements. Also, the increase can be attributed to the new hydrogen installations (which we did not have in 2013). The overall increase in these product costs is also due to the inclusion of ReliOn's cost of revenue associated with sales of fuel cell systems and related infrastructure of $2.1 million in 2014. Gross margin on ReliOn revenues was 8.3% in 2014.

        Cost of revenue—services performed on fuel cell systems and related infrastructure.    Cost of revenue from services performed on fuel cell systems and related infrastructure includes the labor, material costs and allocated overhead costs incurred for our product service and hydrogen site maintenance contracts and spare parts. Excluded from this cost of revenue is the provision for loss contracts which is separately described below.

        Cost of revenue from services performed on fuel cell systems and related infrastructure for the year ended December 31, 2015 increased $3.7 million, or 19.1%, to $22.9 million from $19.3 million for the year ended December 31, 2014. The increase in the cost is attributed to increasing costs of replacement parts, as well as labor and overhead for service personnel necessary to support these service and hydrogen site maintenance contracts. These increases are a direct result of a growing installed base of GenDrive units, and the number of associated customers that have GenCare and GenFuel service contracts. At December 31, 2015 there were 8,655 GenDrive units under GenCare contracts and 22 customer sites under GenFuel contracts, as compared to 5,163 GenDrive units under GenCare contracts and 7 customer sites under GenFuel contracts at December 31, 2014. Gross margin improved to (63.7%) in 2015 from (94.3%) in 2014 due to better leverage with the growing installed base and improved model design.

        Cost of revenue from services performed on fuel cell systems and related infrastructure for the year ended December 31, 2014 increased $4.3 million, or 29.0%, to $19.3 million from $14.9 million for the year ended December 31, 2013. The increase in the costs, including service personnel necessary to support these services and hydrogen site maintenance contracts, was primarily related to a higher number of GenCare and GenFuel service contracts in 2014 and $1.1 million of costs associated with the newly acquired ReliOn. At December 31, 2014 there were 5,163 GenDrive units under GenCare contracts and seven customer sites under GenFuel contracts, as compared to 2,894 GenDrive units under GenCare contracts and no customer sites under GenFuel contracts at December 31, 2013. Gross margin on services improved to (94.3%) in 2014 from (124.2%) in 2013 as the Company became more experienced managing costs of replacement parts and improved model design.

        Cost of revenue—provision for loss contracts related to service.    During 2015, the Company recognized a $10.1 million provision for loss contracts related to service. This provision represents extended maintenance contracts that have projected costs over the remaining life of the contracts that exceed contractual revenues. An analysis of the projected expenses and revenues was performed by management as of December 31, 2015 on each extended maintenance contract. Costs of expected maintenance contracts consist of replacement parts, labor and overhead. Prior to December 31, 2015, the Company was experiencing losses on certain extended maintenance contracts, primarily due to premature stack failures. Stacks are the most significant maintenance parts cost of a fuel cell. Despite experiencing these losses, management did not anticipate future losses over the remaining lives of these


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contracts due primarily to ongoing and continued improvements in stack life, labor leverage and model design; improvements that were expected to continue. During 2015, management determined through its field service technicians and engineering professionals, combined with input from our primary stack supplier, the main cause of periodic stack life degradation. Management worked with its supplier to address the issue, such that all stacks going forward would be corrected for the issue identified. In fact, new stacks being produced and shipped during the fourth quarter of 2015, included the new design solution and are already showing improved performance. Based on testing performed and performance to date of the new stacks in the field, management believes the resolution to this matter will significantly improve the longevity of stack lives. Management further believes that this process and the resolution provide more insight into the life of legacy stacks that are currently components of GenDrive units in the installed base. This insight was factored into management's assumptions when projecting future service costs for contracts outstanding as of year-end 2015. As of December 31, 2015, the Company had 53 extended maintenance contracts with customers, covering approximately 8,700 GenDrive units. Thirty of those extended maintenance contracts, covering approximately 5,400 GenDrive units, were projected to have expenses exceed revenue over their remaining terms, which resulted in the accrual of $10.1 million. These extended maintenance contracts have remaining terms ranging from one to nine years, however, a majority of this incremental cost is expected to be incurred over the next two years as the Company refurbishes the stacks in the installed fleet.

        Cost of revenue—Power Purchase Agreements.    Cost of revenue from Power Purchase Agreements represents payments made to financial institutions for leased equipment and service. All leased units are associated with sale/leaseback transactions in which the Company sells fuel cell systems and related infrastructure to a third-party, leases them back, and operates them at customers' locations who are parties to Power Purchase Agreements with the Company.

        Cost of revenue from Power Purchase Agreements for the year ended December 31, 2015 increased $4.2 million, or 399.3%, to $5.3 million from $1.1 million for the year ended December 31, 2014. The increase was a result of the increase in the number of customer sites in which the Company completed sale/leaseback transactions (14 at December 31, 2015 as compared to four at December 31, 2014). Gross margin declined to 8.1% in 2015 from 50.8% in 2014, due to changes in financing pricing, as well as decreases in the timing difference between when systems were deployed at customer sites (beginning of the revenue stream) and when agreements with financial institutions were reached (beginning expense recognition of lease payments). We began entering into Power Purchase Agreements in the second half of 2014 and there were no Power Purchase Agreements entered into during 2013.

        Cost of revenue—fuel delivered to customers.    Cost of revenue from fuel delivered to customers represents the purchase of hydrogen from suppliers that ultimately is sold to customers. As part of the GenKey solution, the Company contracts with fuel suppliers to purchase liquid hydrogen and separately sells to its customers upon delivery.

        Cost of revenue from fuel delivered to customers for the year ended December 31, 2015 increased $4.5 million, or 203.8%, to $6.7 million from $2.2 million for the year ended December 31, 2014. The increase is due to higher volume of liquid hydrogen delivered to customer sites, as a result of an increase in the number of hydrogen installations completed under GenKey agreements. At December 31, 2015, there were 22 customer sites taking hydrogen fuel delivery compared to seven customer sites at December 31, 2014. The sites generally are the same as those who had purchased hydrogen installations within the GenKey solution. The Company began selling hydrogen fuel to customers during the second half of 2014. Gross margin declined to (31.9%) in 2015 from (12.5%) in 2014, due to inefficiencies related to new product design causing differences between the volume of fuel delivered (purchased) and dispensed (sold).


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        Cost of revenue—other.    Other cost of revenue primarily represents costs associated with research and development contracts including: cash and non-cash compensation and benefits for engineering and related support staff, fees paid to outside suppliers for subcontracted components and services, fees paid to consultants for services provided, materials and supplies used and other directly allocable general overhead costs allocated to specific research and development contracts.

        Cost of other revenue for the year ended December 31, 2015 decreased $2.7 million, or 83.1%, to $0.5 million from $3.2 million for the year ended December 31, 2014. The Company had been working on a U.S. government-related research and development contract primarily in 2014, which was close to completion and had less activity in 2015.

        Cost of other revenue for the year ended December 31, 2014 increased $0.7 million, or 27.8%, to $3.2 million from $2.5 million for the year ended December 31, 2013. The increase is primarily related to increased activity on a U.S. government-related research and development contract.

        Research and development expense.    Research and development expense includes: materials to build development and prototype units, cash and non-cash compensation and benefits for the engineering and related staff, expenses for contract engineers, fees paid to consultants for services provided, materials and supplies consumed, facility related costs such as computer and network services, and other general overhead costs associated with our research and development activities.

        Research and development expense for the year ended December 31, 2015 increased $8.5 million, or 131.1%, to $14.9 million from $6.5 million for the year ended December 31, 2014. This increase was primarily related to an increase in personnel related expenses, materials and fuel consumed on refinement of hydrogen infrastructure design, and $0.4 million of incremental costs due to the impact of research and development associated with ReliOn for an entire year. The increases in personnel and materials were a result of increased efforts on multiple product cost-down programs and prototyping for stack performance enhancement.

        Research and development expense for the year ended December 31, 2014 increased $3.4 million, or 107.3%, to $6.5 million from $3.1 million for the year ended December 31, 2013. This increase was primarily related to an increase in personnel related expenses, coupled with $1.1 million in research and development expenses associated with the acquisition of ReliOn. Incremental research and development costs, exclusive of the incremental activities related to ReliOn, were specifically associated with the new turn-key commercial solution as well as numerous product cost-down programs and product design performance enhancements.

        Selling, general and administrative expenses.    Selling, general and administrative expenses includes cash and non-cash compensation, benefits, amortization of intangible assets and related costs in support of our general corporate functions, including general management, finance and accounting, human resources, selling and marketing, information technology and legal services.

        Selling, general and administrative expenses for the year ended December 31, 2015 increased $7.6 million, or 28.4%, to $34.2 million from $26.6 million for the year ended December 31, 2014. Approximately $7.8 million of this increase was primarily related to an increase in personnel related expenses (for example salary, benefits, travel and stock-based compensation) resulting from continued investment in professional staff to support the additional growth in the business. The stock-based compensation expense component of the increase is also impacted by increases in the fair value of stock options granted in recent years. The overall increase also can be attributed to $1.2 million of HyPulsion acquisition and European startup costs (compared to zero in 2014). Offsetting these increases is a decrease in amortization of intangible assets of $1.4 million in 2015 compared to 2014 due primarily to certain intangible assets becoming fully amortized.


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        Selling, general and administrative expenses for the year ended December 31, 2014 increased $12.0 million, or 82.2%, to $26.6 million from $14.6 million for the year ended December 31, 2013. This increase was primarily related to an increase in personnel related expenses to support the substantial growth in the business including incremental salesforce, additional finance staff, and additional executive staff. The overall increase also stemmed from an increase in professional fees and $2.2 million in expenses due to the acquisition of ReliOn. Amortization of intangible assets remained stable at $2.4 million and $2.3 million for the years ended December 31, 2014 and 2013, respectively.

        Interest and other income.    Interest and other income consists primarily of interest earned on our cash, note receivable, and other income.

        Interest and other income decreased to approximately $157 thousand for the year ended December 31, 2015 from approximately $752 thousand for the year ended December 31, 2014. This decrease is primarily related to the settlement of a license arrangement at ReliOn in 2014, which did not repeat in 2015, as well as a decrease in the overall interest-bearing cash balances at the Company in 2015, as compared to 2014.

        Interest and other income increased to approximately $752 thousand for the year ended December 31, 2014 from approximately $150 thousand for the year ended December 31, 2013. This increase is primarily related to the settlement of a license arrangement at ReliOn resulting in income of $556 thousand, coupled with an increase in interest earned on our cash balances.

        (Loss) gain on acquisition activity, net.    During the year ended December 31, 2015, the Company recognized a gain of $2.9 million associated with the acquisition of HyPulsion and related step acquisition accounting. Also included in (loss) gain on acquisition activity, net is expense of $3.0 million associated with shares issued pursuant to a post-closing true up provision associated with the HyPulsion acquisition.

        During the year ended December 31, 2014, the fair value of the acquired net assets of ReliOn exceeded the purchase consideration, and therefore a gain on bargain purchase of $1.0 million was recognized.

        Change in fair value of common stock warrant liability.    We account for common stock warrants as common stock warrant liability with changes in the fair value reflected in the consolidated statement of operations as change in the fair value of common stock warrant liability.

        The change in fair value of common stock warrant liability for the year ended December 31, 2015 resulted in a decrease in the associated warrant liability of $3.7 million, as compared to an increase of $52.3 million for the year ended December 31, 2014, and an increase of $37.1 million for the year ended December 31, 2013. These variances are primarily due to changes in the Company's common stock share price, and changes in volatility of our common stock, which are significant inputs to the Black-Scholes valuation model.

        Interest and other expense.    Interest and other expense consists of interest and other expenses related to interest on obligations under capital lease and our finance obligation, as well as foreign currency exchange gain (loss).

        Interest and other expense for the year ended December 31, 2015 was approximately $390 thousand, compared to approximately $387 thousand for the year ended December 31, 2014. Changes year over year related to interest expense and foreign currency gains are not significant.

        Interest and other expense for the year ended December 31, 2014 was approximately $387 thousand, compared to approximately $398 thousand for the year ended December 31, 2013. This decrease is primarily related to a decline in interest expense related to an expired loan coupled with a decline in foreign currency exchange gain.


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        Gain on sale of equity interest in joint venture.    Gain on sale of equity interest in joint venture represents the gain on sale of a 25% ownership interest in HyPulsion in 2013. In 2012, the Company formed aCompany’s joint venture with Axane, S.A., a subsidiary of (an Air Liquide under the name HyPulsion. In 2013, Axane purchased the 25% ownership interest in HyPulsion from the Company for a cash purchase pricesubsidiary), through July 31, 2015.   As of $3.3 million (Euro 2.5 million). InAugust 1, 2015, the Company acquired all100% of Axane's interestHypulsion, at which point Mr. Pontone was no longer a board member of Hypulsion.   Mr. Pontone also sits on the boards of Air Liquide Advanced Businesses and Technologies UK in HyPulsion.the UK, Air Liquide Advanced Technologies Gmbh in Germany, Air Liquide Advanced Technologies in France, Societe des Taxis Electriques Parsiens in France, and Fonroch Biogas in France.    We believe Mr. Pontone’s qualifications to sit on our Board of Directors include his senior management experience in the hydrogen mobility and energy space in European markets.

        Income taxes.Gregory L. Kenausis     The deferred tax asset generated from our net operating loss has been offset by a full valuation allowance because itdirector since October 2013. Mr. Kenausis is more likely than not that the tax benefitsfounding partner and since 2005 has been the Chief Investment Officer of Grand Haven Capital AG, an investment firm, where he is the head of trading activity and research and is responsible for managing the fund’s structure. He is also an active board member of other boards of directors.  We believe Mr. Kenausis’s qualifications to sit on our Board of Directors include his background and senior level experience in financial investments, trading and management and equity capital markets.

Larry G. Garberding has served as a director of the net operating loss carry forward will not be realized. The Company also recognizes accrued interestsince 1997. Mr. Garberding was a Director and penalties relatedExecutive Vice President and Chief Financial Officer of DTE Energy Company and the Detroit Edison Company from 1990 until retiring in 2001. Mr. 

Garberding was a Certified Public Accountant, a partner with a major public accounting firm, and has been on the board of several corporations, having had responsibility for financial, operational, regulatory and sales activities. Mr. Garberding received a Bachelor of Science degree in Industrial Administration from Iowa State University. We believe Mr. Garberding’s qualifications to unrecognized tax benefitssit on our Board of Directors include his extensive experience with power and energy companies and his background in accounting, financing and operations.

Douglas T. Hickey has served as a component of income tax expense.

        Income tax benefit for the year ended December 31, 2015 was zero. Income tax benefit for the years ended December 31, 2014 and 2013 was approximately $325 thousand and $410 thousand, respectively, due to reductions in accrued interest and penalties on uncertain tax positions as a result of expirationsdirector of the associated statuteCompany since October 2011. Mr. Hickey previously sat on Plug Power’s Board from September 1, 2000 to April 24, 2006. Mr. Hickey is the former U.S. Ambassador and Commissioner General to the Milan Expo.  Prior, Mr. Hickey served as Chief Executive Officer of limitations.

        Our cash requirements relate primarilyBinWise, Inc. from 2012 to working capital needed2014.  Prior to operate and grow our business, including funding operating expenses, growth in inventoryBinWise, from 2000 to support both shipments of new units and servicing the installed base, funding the growth in our GenKey "turn-key" solution which also includes the installation of our customer's hydrogen infrastructure as well as delivery2011, Mr. Hickey was Managing Director at Hummer Winblad Venture Partners (HWVP), one of the hydrogen fuel, and continued development and expansion of our products. Our abilitynation’s leading software venture capital firms. Prior to achieve profitability and meet future liquidity needs and capital requirements will depend upon numerous factors, including the timing and quantity of product orders and shipments; attaining positive gross margins; the timing and amount of our operating expenses; the timing and costs of working capital needs; the timing and costs of building a sales base; the ability of our customersjoining HWVP, Mr. Hickey served as CEO for Critical Path, Inc., where during his tenure revenue grew from less than $1M to obtain financing to support commercial transactions; our ability to obtain financing arrangements to support the sale or leasing of our products and services to customersmore than $150M and the termscompany earned Forbes.com Number-One Fastest Growing Company Award in 2000. Mr. Hickey previously held the CEO and President position for Global Center Inc., where he grew revenue from zero to more than $50M of such agreements which may require us to pledge or restrict substantial amounts of our cash to support these financing arrangements;recurring revenue and achieved profitability. His focus on the timingcompany’s strategy enabled rapid growth, securing customers like Yahoo, Netscape and costs of developing marketing and distribution channels; the timing and costs of product service requirements; the timing and costs of hiring and training product staff; the extent to which our products gain market acceptance; the timing and costs of product development and introductions; the extent of our ongoing and new research and development programs; and changes in our strategy or our planned activities. If we are unable to fund our operations with positive cash flows and cannot obtain external financing, we may not be able to sustain future operations. As a result, we may be required to delay, reduce and/or cease our operations and/or seek bankruptcy protection.

        We have experienced and continue to experience negative cash flows from operations and net losses. The Company incurred net losses attributable to common shareholders of $55.8 million, $88.6 million and $62.8 million for the years ended December 31, 2015, 2014, and 2013, respectively, and has an accumulated deficit of $993.9 million at December 31, 2015.

        During the year ended December 31, 2015, cash used in operating activities was $47.3 million, consisting primarily of a net loss attributableOracle, ultimately leading to the Company of $55.7 million, coupled with net outflows of operating assets and liabilities of $8.9 million. The investment in working capital primarily was related to inventory procured to meet our backlog requirements. On December 31, 2015, we had cash and cash equivalents of $64.0 million and net working capital of $88.5 million. By comparison, at December 31, 2014, cash and cash equivalents was $146.2 million and net working capital was $167.0 million.

        Net cash used in investing and financing activities for the year ended December 31, 2015 included purchases of equipment and payments on capital lease and finance obligations. In addition, during 2015, the Company signed sale/leaseback agreements with the Company's primary financial institution


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(M&T Bank or the Bank) to facilitate its commercial transactions with key customers. These agreements represent thesuccessful sale of the Company's fuel cell systems, hydrogen infrastructurecompany to Frontier Communications Corporation, (NASDAQ:FTR). Prior to Global Center, Mr. Hickey was CEO and agreementsPresident of MFS DataNet, the leading supplier of data related services to provide related extended maintenanceinternet service providers and enterprise customers worldwide. MFS grew to more than $1 billion in revenue and subsequently completed a successful IPO and trade sale. We believe Mr. Hickey’s qualifications to sit on our Board of Directors include his extensive corporate leadership experience and his proven background growing revenue.

Luke Schneider has served as a director since March 2017.  Mr. Schneider has served as the Bank. The Company then leasesChief Executive Officer of Silvercar, an Austin, TX-based start-up that focuses on the fuel cell systemsrental car space and hydrogen infrastructure backother vehicle mobility applications since early 2012.  Prior to Silvercar, Mr. Schneider was the Chief Technology Officer of Zipcar.  He served at Flexcar, as Chief Technology Officer and Vice President of Strategy.  He is an Entrepreneur-in-Residence at Austin Ventures.  He has also held various positions with Ford.  He received a Master of Business Administration, specializing in Operations and Strategy from the Bank and operates themTepper School of Business at customer locations to fulfill Power Purchase Agreements (PPAs). These operating leases require the Company to maintain cash balances in restricted accounts securing its lease obligations. Cash added to these restricted accounts was $14.2 million during 2015. Cash received from customers under the PPAs is used to make lease payments back to the Bank. As the Company performs under these agreements, the required restricted cash balances are released, according to a set schedule. At December 31, 2015, the Company has seven PPA's that are connected to these sale/leaseback agreements. Remaining lease payments to the Bank associated with these agreements are $26.1 million and have been secured with restricted cash. Also, cash associated with sales of future revenues is required to be recorded as a financing obligation on the consolidated balance sheets and accordingly represents a financing cash inflow.

        With regards to the master lease agreement with the Bank, the Company has a financial covenant, which requires a minimum level of unrestricted cash of $50 million. The Bank currently has remaining contractual lease payments fully secured through a combination of restricted cash and pledges on funds escrowed for future service by the Company. The covenant is maintained in association with the residual exposure of the Bank, which stems from tax benefits taken by the Bank that could be recaptured should the underlying assets not be deployed for five years. This residual exposure at December 31, 2015 amounted to approximately $15 million, and the exposure decreases with the passage of each year. Should the Company's unrestricted cash fall below the aforementioned minimum level, the Company is entitled to remediate the requirement through the provision of additional restricted cash to the secure the outstanding residual tax exposure of the Bank at that time.

        Additional sale/leaseback agreements have been entered into with other financial institutions, under which the Company was required to prepay rent or post security deposits in addition to restricted cash. Prepaid rent and security deposits related to sale/leaseback transactions with these other financial institutions as of December 31, 2015 were $12.1 million and restricted cash was $32.6 million. Prepaid rent and security deposits are classified as operating outflows (and noncurrent assets on the consolidated balance sheets). Remaining lease payments associated with these agreements are $27.9 and have been secured with restricted cash, security deposits and prepaid rent.

        In connection with the sale/leaseback and other agreements described above, cash of $46.8 million is required to be restricted as security and will be released over the lease term. The Company also has letters of credit associated with an agreement to provide hydrogen infrastructure and hydrogen to a customer at its distribution center and with a finance obligation from the sale/leaseback of its building. Cash collateralizing these letters of credit is considered restricted cash and totals $1.0 million.

        On March 2, 2016, the Company, together with its subsidiaries Emerging Power Inc. and Emergent Power Inc. (Loan Parties), entered into a Loan Agreement with Generate Lending, LLC (Lender).

        The Loan Agreement, among other things, provides for a $30 million secured term loan facility (the Term Loan Facility). Advances under the Term Loan Facility bear interest at the rate of 12.0% per annum, subject to compliance with financial covenants and other conditions. The Loan Agreement includes covenants, limitations and events of default customary for similar facilities, including a minimum cash and cash equivalents covenantCarnegie Mellon University and a minimum working capital covenant. Upon the occurrence and continuanceBachelor of an eventScience degree in Mechanical Engineering from University of default, the amounts advanced under the Term Loan Facility bear interestTexas at a default rate of 14.0% per annum. The term of the Loan Agreement is one year, ending March 2, 2017 (Maturity Date).

        PursuantAustin.  We believe Mr. Schenider’s qualifications to the Loan Agreement, (i) $12.5 million of the Term Loan Facility is available immediately, (ii) availability of $12.5 million of the Term Loan Facility is subject to the Loan Parties satisfying certain conditions and (iii) availability of the remaining $5 million of the Term Loan Facility is subject to the Lender's discretion. The Company has borrowed $12.5 million under the Loan


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Agreement. Interest is payable on a monthly basis and the entire then outstanding principal balance of the Term Loan Facility, together will all accrued and unpaid interest, is due and payable on the Maturity Date. On and after October 1, 2016, as and when the Company receives net proceeds from certain restricted cash accounts securing the financing of customer Power Purchase Agreements, the Company is required to prepay the outstanding principal balance of the Term Loan Facility with such net proceeds.

        All obligations under the Loan Agreement are unconditionally guaranteed by the Company's subsidiaries, Emerging Power Inc. and Emergent Power Inc. The Term Loan Facility is secured by substantially all of each Loan Parties' assets, including all intellectual property, all securities in domestic subsidiaries and 65% of the securities in foreign subsidiaries, subject to certain exceptions and exclusions.

        The Loan Agreement has financial covenants that require the Company to maintain at all times minimum unencumbered cash and cash equivalents equal or greater than the then outstanding principal balance of the Term Loan Facility. The financial covenants also require the Company to maintain at all times, on a consolidated basis for the Loan Parties and their subsidiaries, an amount of current assets minus current liabilities (excluding amounts owing under the Term Loan Facility) equal to or greater than 200% of the then outstanding principal balance under the Term Loan Facility.

        The Loan Agreement contains customary affirmative covenants for transactions of this type and other affirmative covenants agreed to by the parties, including, among others, the provision of annual and quarterly financial statements and compliance certificates, maintenance of property, insurance, compliance with laws and environmental matters. The Loan Agreement also provides that each Loan Party will direct proceeds from certain project finance arrangements to a controlled account subject to a first lien security interest by the Lender. The Loan Agreement contains customary negative covenants, including, among others, restrictions on the incurrence of indebtedness, granting of liens, making acquisitions, making loans, dissolving, entering into leases (other than sale/leaseback transactions) and asset sales. The Loan Agreement also provides for a number of customary events of default, including, among others, payment, bankruptcy, covenant, representation and warranty, change of control, judgment and material adverse effect defaults.

        During 2014, we received gross proceeds of $176.7 million from three underwritten public offerings. Net proceeds after underwriting discounts and commissions and other estimated fees and expenses were $165.7 million. In addition, during 2014 we received $18.3 million from the exercise of previously issued common stock warrants.

        To date, we have funded our operations primarily through public and private offerings of common and preferred stock, a sale/leaseback of our building and our previous line of credit. The Company believes that its current cash, cash equivalents, cash anticipated to be generated from future operations and, to the extent exercised, cash generated from the exercise of outstanding warrants will provide sufficient liquidity to fund operations for at least the next twelve months. This projection is basedsit on our current expectations regardingBoard of Directors include his extensive experience in helping guide companies, from start-ups to large enterprises, through major business milestones including IPOs, acquisitions, and product sales and service, cost structure, cash burn rate and other operating assumptions.development.

 Several key indicators of liquidity are summarized in the following table (in thousands):

 
 2015 2014 2013 

Cash and cash equivalents at end of period

 $63,961 $146,205 $5,027 

Restricted cash at end of period

  47,835  500  500 

Working capital at end of period

  88,524  167,039  11,110 

Net loss attributable to common shareholders

  55,795  88,644  62,791 

Net cash used in operating activities

  47,274  40,780  26,881 

Purchase of property, plant and equipment

  3,520  1,413  111 

Net cash (used in) provided by financing actvities

  (32,923) 182,923  19,368 

Table of ContentsSECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

        Under Internal Revenue Code (IRC) Section 382, the use of loss carryforwards may be limited if a change in ownership of a company occurs. If it is determined that, due to transactions involving the Company's shares owned by its 5 percent or greater shareholders, a change of ownership has occurred under the provisions of IRC Section 382, the Company's federal and state net operating loss carryforwards could be subject to significant IRC Section 382 limitations.

 Based on studies

Section 16(a) of the changes in ownership of the Company, it has been determined that IRC Section 382 ownership changes have occurred which significantly reduces that amount of pre-change net operating losses that can be used in future years to $13.5 million. In addition, net operating losses of $58.1 million incurred after the most recent ownership change are not subject to IRC Section 382 and are available for use in future years. Accordingly, the Company's deferred tax assets include $71.6 million of net operating loss carryforwards.

        The ownership changes also resulted in net unrealized built in losses per IRS Notice 2003-65 which should result in recognized built in losses during the five year recognition period. These recognized built in losses will translate into unfavorable book to tax add backs in the Company's 2016 to 2018 U.S. corporate income tax returns of approximately $14.3 million that resulted in a gross deferred tax liability of $5.4 million at December 31, 2015. This gross deferred tax liability offsets existing gross deferred tax assets effectively reducing the valuation allowance. This has no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance.

Contractual Obligations

        Contractual obligations as of December 31, 2015, under agreements with non-cancelable terms are as follows (in thousands):

 
 Total <1 year 1 - 3 Years 3 - 5 Years > 5 Years 

Operating lease obligations(A)

  60,282  11,773  23,371  19,635  5,503 

Purchase obligations(B)

  17,044  7,716  9,304  16  8 

Finance obligation(C)

  17,480  2,671  5,395  5,487  3,927 

 $94,806 $22,160 $38,070 $25,138 $9,438 

(A)
The Company has several non-cancelable operating leases that generally expire over the next six years, primarily associated with sale/leaseback transactions and are secured with restricted cash. In addition, under a limited number of arrangements, the Company provides its products and services to customers in the form of a Power Purchase Agreement that generally expire six year terms. The Company accounts for these non-cancelable sale/leaseback transactions as operating leases in accordance with Accounting Standards Codification (ASC) Subtopic 840-40,Leases—Sale/Leaseback Transactions. See note 16 (Commitments and Contingencies) of the Consolidated Financial Statements for more detail.

(B)
The Company has purchase obligations related to inventory build to meet its sales plan, stack and stack components for new units and servicing existing ones, and the maintenance of its building and storage of documents.

(C)
During the year ended December 31, 2015, the Company received cash for future services to be performed associated with certain sale/leaseback transactions, which was treated as a finance obligation. In addition, the Company has a finance obligation related to a sale/leaseback transaction involving its building. These obligations are secured with restricted cash.

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Critical Accounting Estimates

        The preparation of financial statements in conformity with U.S. generally accepted accounting principles and related disclosures requires management to make estimates and assumptions.

        We believe that the following are our most critical accounting estimates and assumptions the Company must make in the preparation of its Consolidated Financial Statements and related disclosures:

        Revenue Recognition:    The Company recognizes revenue under arrangements for products and services, which may include the sale of products and related services, including revenue from installation, service and maintenance, spare parts, hydrogen fueling services (which may include hydrogen supply as well as hydrogen fueling infrastructure) and leased units. The Company also recognizes revenue under research and development contracts, which are primarily cost reimbursement contracts associated with the development of PEM fuel cell technology.

        The Company enters into revenue arrangements that may contain a combination of fuel cell systems and equipment, installation, service, maintenance, spare parts, and other support services. Revenue arrangements containing fuel cell systems and equipment may be sold, or leased to customers. For these multiple deliverable arrangements, the Company accounts for each separate deliverable as a separate unit of accounting if the delivered item or items have value to the customer on a standalone basis. The Company considers a deliverable to have standalone value if the item is sold separately by us or another entity or if the item could be resold by the customer. The Company allocates revenue to each separate deliverable based on its relative selling price. For a majority of our deliverables, the Company determines relative selling prices using its best estimate of the selling price since vendor-specific objective evidence and third-party evidence is generally not available for the deliverables involved in its revenue arrangements due to a lack of a competitive environment in selling fuel cell technology. When determining estimated selling prices, the Company considers the cost to produce the deliverable, a reasonable gross margin on that deliverable, the selling price and profit margin for similar products and services, the Company's ongoing pricing strategy and policies, the value of any enhancements that have been built into the deliverable and the characteristics of the varying markets in which the deliverable is sold, as applicable. The Company determines estimated selling prices for deliverables in its arrangements based on the specific facts and circumstances of each arrangement and analyzes the estimated selling prices used for its allocation of consideration of each arrangement.

        Once relative selling prices are determined, the Company proportionately allocates the sale consideration to each element of the arrangement. The allocated sales consideration related to fuel cell systems and equipment, spare parts, and hydrogen infrastructure is recognized as revenue at shipment if title and risk of loss have passed to the customer, there is persuasive evidence of an arrangement, the sales price is fixed or determinable, collection of the related receivable is reasonably assured, and customer acceptance criteria, if any, have been successfully demonstrated. The allocated sales consideration related to service and maintenance is generally recognized as revenue on a straight-line basis over the term of the contract, as appropriate.

        With respect to sales of consigned spare parts, the Company does not recognize revenue until the risks and rewards of ownership have transferred, the price is fixed, and the Company has a reasonable expectation of collection upon billing.

        For those customers who do not purchase an extended maintenance contract, the Company does not include a right of return on its products other than rights related to standard warranty provisions that permit repair or replacement of defective goods. The Company accrues for anticipated standard warranty costs at the same time that revenue is recognized for the related product. Only a limited number of fuel cell units remain under standard warranty.


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        In a vast majority of its commercial transactions, the Company sells extended maintenance contracts that generally provide for a five to ten year warranty from the date of product installation. These types of contracts are accounted for as a separate deliverable, and accordingly, revenue generated from these transactions is deferred and recognized in income over the warranty period, generally on a straight-line basis. Additionally, the Company may enter into annual service and extended maintenance contracts that are billed monthly. Revenue generated from these transactions is recognized in income on a straight-line basis over the term of the contract. Costs are recognized as incurred over the term of the contract. When costs are projected to exceed revenues on the life of the contract, an accrual for loss contracts is recorded. Costs are estimated based upon historical experience, contractual agreements and the Company's cost reduction plans. The actual results may differ from these estimates.

        The Company is a party to Power Purchase Agreements (PPAs) with certain key customers, such as Walmart. Revenue associated with these agreements is treated as rental income and recognized on a straight-line basis over the life of the agreements. The Company also has rental expense associated with sale/leaseback agreements with financial institutions that were entered into commensurate with the PPAs. Rental expense is also recognized on a straight-line basis over the life of the agreements and is characterized as cost of PPA revenue on the consolidated statement of operations.

        The Company purchases hydrogen fuel from suppliers and sells to its customers upon delivery. Revenue and cost of revenue related to this fuel is recorded as invoiced and incurred, respectively. Both are included in the "Fuel delivered to customers" categories on the consolidated statement of operations.

        One of the critical estimates that management makes is the projection of service costs related to GenDrive units under extended maintenance contracts. This estimate is important in management's determination of whether a loss contract exists, as well as the amount of any loss. When projected costs to be incurred over the remaining life of the extended maintenance contracts is estimated to exceed contractual revenues, a provision for loss contracts related to service is recorded. An analysis of projected expenses and revenues is performed on each extended maintenance contract. Cost of expected maintenance contracts consist of replacement parts, labor and overhead. Prior to December 31, 2015, the Company experienced losses on extended maintenance contracts, primarily due to premature stack failures. Stacks are the most significant part cost of a fuel cell. In previous periods, despite experiencing losses on certain extended maintenance contracts, management did not anticipate future losses over the remaining lives of the contracts due primarily to ongoing and continued improvements in stack life, labor leverage and design improvements. These improvements were expected to continue. During 2015, management determined through its field service technicians and engineering professionals, combined with input from its primary stack supplier, the main cause of premature stack life degradation. Management worked with its supplier to address the issue such that all stacks going forward would be corrected for the issue identified. This work was finalized and the new stacks began to be produced and shipped during the fourth quarter of 2015. Based on testing performed, management believes the resolution to this matter will significantly improve the longevity of stacks. It has also provided management with more insight into the life of legacy stacks that are currently components of GenDrive units in the installed base. This insight is factored into management's assumptions when projecting future service costs. A variety of assumptions are included in the estimates of future service costs, including the life of parts, failure rates of parts, and future costs of parts. If and when information becomes available, management will update its estimate of impact this matter, if any, has on its extended maintenance contracts. This analysis could result in adjustments to the Company's consolidated balance sheet and statement of operations in the future.

        Contract accounting is used for research and development contract revenue. The Company generally shares in the cost of these programs with cost sharing percentages generally ranging from 30% to 50% of total project costs. Revenue from time and material contracts is recognized on the basis of hours expended plus other reimbursable contract costs incurred during the period. All allowable


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work performed through the end of each calendar quarter is billed, subject to limitations in the respective contracts.

        Valuation of long-lived assets:    We assess the potential impairment of long-lived assets, including identifiable intangible assets, whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Factors we consider important that could trigger an impairment review include, but are not limited to, the following:

        When we determine that the carrying value of long-lived assets, including identifiable intangible assets, may not be recoverable based upon the existence of one or more of the above indicators of impairment, we would measure any impairment based upon the provisions of Financial Accounting Standards Board (FASB) ASC No. 350-35-30-14,Intangibles—Goodwill and Other, and FASB ASC No. 360-10-35-15,Impairment or Disposal of Long-Lived Assets, as appropriate. Any resulting impairment loss could have a material adverse impact on our financial condition and results of operations.

        Stock-based Compensation:    We recognize stock-based compensation expense associated with the vesting of share based instruments in the consolidated statements of operations. Determining the amount of stock-based compensation to be recorded requires us to develop estimates to be used in calculating the grant-date fair value of stock options. We calculate the grant-date fair values using the Black-Scholes valuation model. The Black-Scholes model requires us to make estimates of the following assumptions:

        Expected volatility—The estimated stock price volatility was derived based upon the Company's actual stock prices over an historical period equal to the expected life of the options, which represents the Company's best estimate of expected volatility.

        Expected option life—The Company's estimate of an expected option life was calculated in accordance with the simplified method for calculating the expected term assumption. The simplified method is a calculation based on the contractual life and vesting terms of the associated options.

        Risk-free interest rate—We use the yield on zero-coupon U.S. Treasury securities having a maturity date that is commensurate with the expected life assumption as the risk-free interest rate. The amount of stock-based compensation recognized during a period is based on the value of the portion of the awards that are ultimately expected to vest. Forfeitures are required to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The term "forfeitures" is distinct from "cancellations" or "expirations" and represents only the unvested portion of the surrendered option. We review historical forfeiture data and determine the appropriate forfeiture rate based on that data. We re-evaluate this analysis periodically and adjust the forfeiture rate as necessary. Ultimately, we will recognize the actual expense over the vesting period only for the shares that vest.

        Warrant Accounting:    We account for common stock warrants in accordance with applicable accounting guidance provided in FASB ASC Topic 815,Derivatives and Hedging—Contracts in Entity's Own Equity, as either derivative liabilities or as equity instruments depending on the specific terms of the warrant agreement. In compliance with applicable securities law, registered common stock warrants that require the issuance of registered shares upon exercise and do not sufficiently preclude an implied


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right to cash settlement are accounted for as derivative liabilities. We classify these derivative warrant liabilities on the consolidated balance sheets as a long-term liability, which is revalued at each balance sheet date subsequent to the initial issuance. We use the Black-Scholes pricing model to value the derivative warrant liability. The Black-Scholes pricing model, which is based, in part, upon unobservable inputs for which there is little or no market data, requires the Company to develop its own assumptions.

        The Company used the following assumptions for its common stock warrants issued on January 20, 2014. The risk-free interest rate for January 20, 2014 (issuance date), December 31, 2014, and December 31, 2015 was 1.65%, 1.35%, and 1.28%, respectively. The volatility of the market price of the Company's common stock for January 20, 2014, December 31, 2014 and December 31, 2015 was 107.6%, 119.2%, and 128.4% respectively. The expected average term of the warrants used for January 20, 2014, December 31, 2014, and December 31, 2015 was 5.0 years, 4.0 years, and 3.0 years, respectively.

        The Company used the following assumptions for its common stock warrants issued on February 20, 2013. The risk-free interest rate for February 20, 2013 (issuance date), December 31, 2014, and December 15, 2015 was 0.85%, 1.06%, and 0.98%, respectively. The volatility of the market price of the Company's common stock for February 20, 2013, December 31, 2014, and December 31, 2015 was 102.0%, 126.2%, and 111.9% respectively. The expected average term of the warrants used for February 20, 2013, December 31, 2014, and December 31, 2015 was 5.0 years, 3.1 years, and 2.1 years, respectively.

        The Company used the following assumptions for its common stock warrants issued on May 31, 2011. The risk-free interest rate for May 31, 2011 (issuance date), December 31, 2014, and December 31, 2015 was 0.75%, 0.21%, and .50% respectively. The volatility of the market price of the Company's common stock for May 31, 2011, December 31, 2014, and December 31, 2015 was 94.4%, 136.6%, and 79.8% respectively. The expected average term of the warrants used for May 31, 2011, December 31, 2014, and December 31, 2015 was 2.4 years, 1.4 years, and 0.4 years, respectively.

        There was no expected dividend yield for the warrants granted. If factors change and different assumptions are used, the warrant liability and the change in estimated fair value could be materially different. Generally, as the market price of our common stock increases, the fair value of the warrant increases, and conversely, as the market price of our common stock decreases, the fair value of the warrant decreases. Also, a significant increase in the volatility of the market price of the Company's common stock, in isolation, would result in a significantly higher fair value measurement; and a significant decrease in volatility would result in a significantly lower fair value measurement. Changes in the fair value of the warrants are reflected in the consolidated statements of operations as change in fair value of common stock warrant liability.

        In February 2016, an accounting update was issued which requires balance sheet recognition for operating leases, among other changes to previous lease guidance. This accounting update is effective for fiscal years beginning after December 15, 2018. The Company is evaluating the impact this update will have the consolidated financial statements.

        In November 2015, an accounting update was issued that changes the classification of current and noncurrent deferred tax assets and liabilities. The new standard requires deferred tax assets and liabilities to be presented as noncurrent amounts. The Company early adopted the standard prospectively, beginning December 31, 2015. The adoption did not have a significant effect on the consolidated financial statements.

        In July 2015, an accounting update was issued that changes inventory measurement from lower of cost or market to lower of cost and net realizable value. The new standard applies to inventory measured at first-in, first-out (FIFO). This accounting update is effective for the reporting periods


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beginning after December 15, 2016, and interim periods within those years. The Company does not expect the adoption of this update to have a significant effect on the consolidated financial statements.

        In August 2014, an accounting update was issued relating to how management assesses conditions and events that could raise substantial doubt about an entity's ability to continue as a going concern. This accounting update is effective for reporting periods ending after December 15, 2016, and for annual and interim periods thereafter. The Company does not expect the adoption of this update to have a significant effect on the consolidated financial statements.

        In June 2014, an accounting update was issued that replaces the existing revenue recognition framework regarding contracts with customers. In July 2015, the Financial Accounting Standards Board (FASB) announced a one year delay in the required adoption date from January 1, 2017 to January 1, 2018. The Company is evaluating the effect this update will have on the consolidated financial statements and has not yet selected a transition method.

Item 7A.    Quantitative and Qualitative Disclosures about Market Risk

        From time to time, we may invest our cash in government, government backed and interest-bearing investment-grade securities that we generally hold for the duration of the term of the respective instrument. We do not utilize derivative financial instruments, derivative commodity instruments or other market risk sensitive instruments, positions or transactions in any material fashion. We are not subject to any material risks arising from changes in interest rates, foreign currency exchange rates, commodity prices, equity prices or other market changes that affect market risk sensitive instruments.

        Our exposure to changes in foreign currency rates is primarily related to sourcing inventory from foreign locations and operations of HyPulsion. This practice can give rise to foreign exchange risk resulting from the varying cost of inventory to the receiving location. The Company reviews the level of foreign content as part of its ongoing evaluation of overall sourcing strategies and considers the exposure to be not significant. Our HyPulsion exposure is mitigated by the present low level of operation. Its sourcing is primarily intercompany in nature and denominated in U.S. dollar.

Item 8.    Financial Statements and Supplementary Data

        The Company's Consolidated Financial Statements included in this report beginning at page F-1 are incorporated in this Item 8 by reference.

Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A.    Controls and Procedures

        As required by rule 13a-15(b) under the Securities Exchange Act of 1934, as amended, (the "Exchange Act"requires the Company’s officers, as defined by Section 16, and directors, and persons who own more than 10% of the Company’s outstanding shares of Common Stock (collectively, “Section 16 Persons”), to file initial reports of ownership and reports of changes in ownership with the SEC. Section 16 Persons are required by SEC regulations to furnish the Company with copies of all Section 16(a) forms they file.

Form 4s were filed late on (1) January 15, 2016 for Messrs. McNamee, Garberding, Hickey, Willis, Roth, Pontone, Kenauisis, and Ms. Helmer; (2) October 17, 2016 for Messrs. Pontone and Willis, and (3) October 18, 2016 for Messrs. McNamee, Hickey, Kenausis, Garberding, Roth and Ms. Helmer, in each case for stock grants made pursuant to the Company’s Director Compensation Policy and in accordance with the Company’s Amended and Restated 2011 Stock Option and Incentive Plan.  Form 4s were filed late on (1) August 18, 2016 for Messrs. Marsh, Middleton, Schmid, and Conway related to stock options grants made in accordance with the Company’s Amended and Restated 2011 Stock Option and Incentive Plan, and (2) December 30, 2016 for Mr. Middleton, related to stock grants made in accordance with the Company’s Amended and Restated 2011 Stock Option and Incentive Plan.

(b)     EXECUTIVE OFFICERS

The names and ages of all executive officers of the Company and the principal occupation and business experience for at least the last five years for each are set forth below. The ages of and biographical information regarding each executive officer is based on information furnished to the Company by each executive officer and is as of the endApril 28, 2017.

Executive Officers

Age

Position

Andrew Marsh

61

President, Chief Executive Officer and Director

Paul B. Middleton

50

Senior Vice President and Chief Financial Officer

Keith C. Schmid

54

Senior Vice President and Chief Operating Officer

Gerard L. Conway, Jr.

52

General Counsel, Corporate Secretary and Senior Vice President

Jose Luis Crespo

47

Vice President, Global Sales

Martin D. Hull

49

Corporate Controller and Chief Accounting Officer

The biographies of each of the period covered byexecutive officers below contains information regarding the person’s service as an executive, business experience, director positions held currently or at any time during the last five years, information regarding the experiences, qualifications, attributes or skills that caused the Corporate Governance Committee and the Board of Directors to determine that the person should serve as an executive officer.

Andrew Marsh’s biographical information can be found above in this Annual Report on Form 10-K, the Company's management conducted an evaluationItem 10 under the supervision and with the participation of the Company's Chief Executive Officer“DIRECTORS”.

Paul B.Middleton joined Plug Power Inc. as Senior Vice President and Chief Financial Officer regardingin 2014. Prior to Plug Power, Mr. Middleton worked at Rogers Corp., a global manufacturer and distributor of specialty polymer composite materials and components, from 2001 to 2014. During his tenure at Rogers Corp., Mr. Middleton served in many senior financial leadership roles, including Corporate Controller and Principal Accounting Officer, Treasurer and Interim Chief Financial Officer. Prior to Rogers Corp., Mr. Middleton managed all financial administration for the effectivenesstools division of Coopers Industries from 1997 to 2001. Mr. Middleton holds a Master of Science in Accounting and a BBA from the designUniversity of Central Florida. Additionally, he is a Certified Public Accountant.

Keith C. Schmid joined Plug Power Inc. as Senior Vice President and operationChief Operating Officer in 2013. Mr. Schmid served as President of SPS Solutions, a power solutions and energy storage consulting firm, from 2011 to 2013. Previously, Mr. Schmid served as CEO of Boston-Power Incorporated, a provider of large format lithium ion battery solutions, in 2011, and as President and CEO of Power Distribution Incorporated, a power distribution and protection company, from 2007 to 2010. In addition, Mr. Schmid held the Company's disclosure controlsposition of General Manager, Industrial Energy Division- Americas for Exide Technologies from 2001 to 2007. Mr. Schmid holds a Master of Science degree in Engineering and procedures (as defined in Rules 13a-15(e)an M.B.A. from the University of Wisconsin—Madison.

Gerard L. Conway, Jr. has served as General Counsel and 15d-15(e) under the Exchange Act). Based uponCorporate Secretary since September 2004 and, since March 2009, has also served as Senior Vice President. In that evaluation the Company's management has concluded that the Company's disclosure controls and procedures were effective as of December 31, 2015.

        The Company's managementcapacity, Mr. Conway is responsible for establishingadvising the Company on legal issues such as corporate law, securities, contracts, strategic alliances and maintaining adequate internal control over financial reporting,intellectual property. He also serves as such term is definedthe Compliance Officer for securities matters affecting the Company. During his tenure, Mr. Conway served as Vice President of Government Relations from 2005 to June 2008 and in Rule 13a-15(f)that capacity he advocated on energy issues, policies, legislation and 15d-15(f) underregulations on the Exchange Act. The Company's internal control over financial reporting is a process designed to provide


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reasonable assurance regarding the reliability of financial reportingstate, federal, national and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles, and includes those policies and procedures that:

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

        The Company's management, including the Chief Executive Officer and Chief Financial Officer, assessed as of December 31, 2015 the effectiveness of the Company's internal control over financial reporting. In making this assessment, management used the criteria set forth in the framework inInternal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on the results of this evaluation, management has concluded that the Company's internal control over financial reporting as of December 31, 2015 was effective.

        The Company has excluded the operations of Hypulsion U.S. Holding, Inc. (HyPulsion), acquired during 2015, which is described in note 4 of the Consolidated Financial Statements, from the scope of management's assessment of internal control over financial reporting. The assets excluded from management's assessment of internal control over financial reporting comprised approximately 7.3% of total consolidated assets at December 31, 2015. The revenue excluded from management's assessment of internal control over financial reporting comprised approximately 0.3% of total consolidated revenues as of December 31, 2015.

        The Company's independent registeredcertified public accounting firm of Marvin and Company, P.C. from November 2012 to March 2015. Prior to that, Mr. Hull was with KPMG LLP, serving as partner from October 2004 to September 2012, and has issued a report ontotal of 24 years of public accounting experience. Mr. Hull holds a Bachelors of Business Administration with a concentration in Accounting from the effectivenessUniversity of Notre Dame. Additionally, he is a Certified Public Accountant.

Subject to any terms of any employment agreement with the Company (as described under Item 11 — EXECUTIVE COMPENSATION), each of the Company's internal control over financial reporting asexecutive officers holds his or her respective office until the regular annual meeting of December 31, 2015, which is included in Item 8the Board of this Annual Report on Form 10-K and incorporated herein by reference.

        There were no changes inDirectors following the Company's internal control over financial reporting identified in connection with the evaluation of such internal control that occurred during the Company's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company's internal control over financial reporting.

Item 9B.    Other Information

        Not applicable.


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PART III

Item 10.    Directors, Executive Officers and Corporate Governance

(a)
Directors

        Incorporated herein by reference is the information appearing under the captions "Information about our Directors" and "Section 16(a) Beneficial Ownership Reporting Compliance" in the Company's definitive Proxy Statement for its 2016 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission.until his or her successor is elected and qualified or until his or her earlier resignation or removal

(b)
Executive Officers

 Incorporated herein by reference is the information appearing under the captions "Information about our Executive Officers" and "Section 16(a) Beneficial Ownership Reporting Compliance" in the Company's definitive Proxy Statement for its 2016 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission.

(c)

Code of Business Conduct and Ethics
     CODE OF BUSINESS CONDUCT AND ETHICS

We have adopted a Code of Business Conduct and Ethics that applies to all officers, directors, employees and consultants of the Company.  The Code of Business Conduct and Ethics is intended to comply with Item 406 of Regulation S-K of the Securities Exchange Act of 1934 and with applicable rules of The NASDAQ Stock Market, Inc.  Our Code of Business Conduct and Ethics is posted on our Internet website under the "Investor" page.“Investor Relations” page, under the

“Governance” section.  Our Internet website address iswww.plugpower.com.To the extent required or permitted by the rules of the SEC and NASDAQ, we will disclose amendments and waivers relating to our Code of Business Conduct and Ethics in the same place as our website.

ITEM 11.     EXECUTIVE COMPENSATION

Compensation Discussion and Analysis

We provide what we believe is a competitive total compensation package to our executive management team through a combination of base salary, annual incentive bonuses, long-term equity incentive compensation, and broad-based benefits programs. We place emphasis on pay-for-performance based incentive compensation, which is designed to reward our executives based on the achievement of predetermined performance goals. This Compensation Discussion and Analysis explains our compensation objectives, policies and practices with respect to each individual serving as our Chief Executive Officer or Chief Financial Officer during 2016 and the three most highly-compensated executive officers other than our Chief Executive Officer and Chief Financial Officer, who are collectively referred to as the “named executive officers.”

Item 11.Objectives of Our Executive Compensation
Programs

 Incorporated herein

Our compensation programs for our named executive officers are designed to achieve the following objectives:

·                  Attract and retain talented and experienced executives;

·                  Motivate and reward executives whose knowledge, skills and performance are critical to our success;

·                  Provide a competitive compensation package which is weighted towards pay-for-performance and in which total compensation is primarily determined by referenceCompany and individual results and the creation of shareholder value;

·                  Ensure fairness among the executive management team by recognizing the contributions each executive makes to our success; and

·                  Motivate our executives to manage our business to meet our short- and long-term objectives and reward them for meeting these objectives.

Independent Compensation Consultant

During 2014, Radford was retained as the Compensation Committee’s independent adviser to provide advisory services to aid the Compensation Committee in its oversight of executive compensation. Radford did not perform any other services for the Company in 2014, 2015, or 2016. The Compensation Committee provided Radford with preliminary instructions regarding the goals of our compensation program and the parameters of the competitive review of executive compensation packages to be conducted by Radford. Radford was instructed to benchmark all components of compensation for all executive officer positions, including base salary, bonus and equity compensation. The Compensation Committee also instructed Radford to review the public disclosure by our peer companies concerning their executive compensation model and guidelines and compare them to our peer companies and actual compensation practices.

Our peer companies included the following:  Argan, Ballard Power Systems, Capstone Turbine, FuelCell Energy, PowerSecure International, OPOWER, Alliance Fiber Optic Products, Ambarella, CalAmp, Electronics for Imaging, Finisar, GT Advanced Technologies, Inphi, InvenSense, iRobot, Jive Software, Maxwell Technologies, Mercury Systems, Rambus, and Synaptics.

Our Executive Compensation Programs

Our executive compensation primarily consists of base salary, annual incentive bonuses, long-term equity incentive compensation and broad-based benefits programs. Consistent with the emphasis we place on pay-for-performance based incentive compensation, long-term equity incentive compensation in the form of stock options and restricted stock constitute a significant portion of our total executive compensation.

Within the context of the overall objectives of our compensation programs, our Compensation Committee determined the specific amounts of compensation to be paid to each of our executives in 2016 based on a number of factors, including:

·                  Its review of the report provided by Radford in 2014 showing the amount of compensation paid our peer companies to their executives with similar roles and responsibilities;

·                  Our executives’ performance during 2016 in general and as measured against predetermined performance goals;

·                  The nature, scope and level of our executives’ responsibilities;

·                  Our executives’ effectiveness in leading the Company’s initiatives to increase customer value, productivity and revenue growth;

·                  The individual experience and skills of, and expected contributions from, our executives;

·                  The executive’s contribution to the Company’s commitment to corporate responsibility, including the executive’s success in creating a culture of unyielding integrity and compliance with applicable law and the Company’s ethics policies;

·                  The amounts of compensation being paid to our other executives;

·                  The executive’s contribution to our financial results;

·                  Our executives’ historical compensation at our Company; and

·                  Any contractual commitments we have made to our executives regarding compensation.

Each of the primary elements of our executive compensation is discussed in detail below, including a description of the particular element and how it fits into our overall executive compensation.  Compensation paid to our named executive officers in 2016 is discussed under each element. In the descriptions below, we have identified particular compensation objectives which we have designed our executive compensation programs to serve; however, we have designed our compensation programs to complement each other and to collectively serve all of our executive compensation objectives described above. Accordingly, whether or not specifically mentioned below, we believe that, as a part of our overall executive compensation, each element to a greater or lesser extent serves each of our objectives.

Base Salary

We pay our executives a base salary which we review and determine annually. We believe that a competitive base salary is a necessary element of any compensation program designed to attract and retain talented and experienced executives. We also believe that attractive base salaries can motivate and reward executives for their overall performance. Base salaries are, in part, established based on the individual experience, skills, expected contributions of our executives, and our executives’ performance during the prior year.

After a review of 2015 base salaries, and in consideration of the recommendations made by Radford, the annual base salaries of our named executive officers for 2016 and 2015 were as follows: Mr. Marsh —$600,000 in 2016 and 2015; Mr. Middleton - $375,000 in 2016 and 2015; Mr. Schmid - $391,000 in 2016 and 2015; and Mr. Conway —$280,000 in 2016 and 2015, and Mr. Crespo - $220,000 in 2016 and 2015.  Our executives’ base salaries reflect the initial base salaries that we negotiated with each of our executives at the time of his or her initial employment or promotion and our subsequent adjustments to these amounts to reflect market increases, the growth and stage of development of our Company, our executives’ performance and increased experience, any changes in our executives’ roles and responsibilities, and other factors. The initial base salaries that we negotiated with our executives were based on our understanding of the market at the time, the individual experience and skills of, and expected contribution from, each executive, the roles and responsibilities of the executive, the base salaries of our existing executives, and other factors.

Annual Incentive Bonuses

Our named executive officers are eligible to receive annual incentive bonuses based on our pay-for-performance incentive compensation program. They are eligible to receive annual incentive bonuses primarily based upon their performance as measured against predetermined individual performance goals, including financial measures, achievement of strategic objectives, and other factors. The primary objective of this program is to motivate and reward our named executive officers for meeting individual performance goals. We do not believe that every important aspect of executive performance is capable of being specifically quantified in a predetermined performance goal. For example, events outside of our control may occur after we have established the named executive officers’ individual performance goals for the year that require our named executive officers to focus their attention on different or other strategic initiatives; thus, the individual performance goals may be modified during the fiscal year by the President and Chief Executive Officer, or the Board of Directors in the case of the President and Chief Executive Officer himself, to account for such events.

Within our pay-for-performance incentive compensation program, specific performance attainment levels are indicated for each performance goal. These performance attainment levels correlate to potential bonus award amounts that are calculated as a percentage of each executive’s base salary.

We established target and threshold attainment levels for each of our named executive officers based on a percentage of his or her base salary. For Mr. Marsh, the target and threshold levels were both set at 100% of his base salary. For Mr. Middleton and Mr. Schmid, the target and threshold levels were set at 100% and 65%, respectively, of their base salary. For Mr. Crespo, the target and threshold levels were set at 200% and 100%, respectively, of his base salary.  For Mr. Conway, the target and threshold levels were set at 75% and 30%, respectively, of his base salary.  Because the annual incentive bonuses are payable based on the achievement of each of several different performance goals, the executive officer may earn a bonus in an amount equal to between 0% and 100% (or 0% and 200% in the case of Mr. Crespo, and 0% and 75% in the case of Mr. Conway) of his base salary given his actual performance. If a performance goal is not met, then the executive does not earn the portion of the bonus award attributable to that objective. The threshold level for each performance goal is considered challenging for the executive to attain, and the executive would meet expectations if he achieved this level. The target attainment level is considered the maximum, or target, level for each performance goal because it is most challenging for the executive to attain, and the executive would need to exceed expectations to achieve this level. The threshold and target performance attainment levels are intended to provide for correspondingly greater or lesser incentives in the event that performance is within an appropriate range above or below the target performance attainment level.

In order to link each executive’s performance to corporate-wide strategy, the executives’ individual performance goals directly correlate to our corporate milestones, which are recommended by management and adopted or modified by the Board of Directors after appropriate consideration and review. The executives’ individual performance goals are determined in the same way as the corporate milestones such that management reviews how each executive may contribute to the corporate milestones and recommends individual performance goals to the Board of Directors. The Board of Directors, after appropriate consideration and review, approves or modifies the individual performance goals. For 2016, the individual performance goals, as well as the corporate milestones, included (i) annual product order targets, (ii) revenue, (iii) gross margins and (iv) operating cash flows. Each performance goal is given a relative weighting for each executive such that the achievement of (or failure to achieve) certain objectives has a greater impact on the potential bonus award. For 2016, the goals were weighted as follows for Messrs. Marsh, Middleton, Schmid, and Conway: order targets — 25%, revenue — 25%, gross margins — 25% and strategic initiatives — 25%.  For Mr. Crespo, the goals were weighted 50% towards order targets and 50% toward revenue.  Because disclosure of the specific individual performance goals would give competitors information that could be leveraged for competitive advantage, we do not disclose these specific individual performance goals or our executives’ actual performance against such goals.

After completion of the fiscal year, initially the Chief Executive Officer and other members of management, as appropriate, make a recommendation to the Compensation Committee of the Board of Directors for each executive’s potential bonus amount based on his level of attainment of each of his individual performance goals (with the exception of the Chief Executive Officer himself whose level of attainment is evaluated by the Compensation Committee directly). The Board of Directors, after review and discussion and recommendation from the Compensation Committee, determines the final level of attainment for each executive’s individual performance goals.

In 2016, Mr. Marsh earned a bonus of $300,000, or 50% of his annual base salary. Mr. Middleton earned a bonus of $187,500, or 50% of his annual base salary.  Mr. Schmid earned a bonus of $195,500, or 50% of his annual base salary. Mr. Crespo earned a bonus of $440,000, or 200% of his annual base salary.  Mr. Conway earned a bonus of $105,000, or 37.5% of his annual base salary.  Annual bonus awards made to the named executive officers in 2017 for performance in 2016 are reflected in the Non-Equity Incentive Plan Compensation column of the “Summary Compensation Table”.

Long-Term Equity Incentive Compensation

We grant long-term equity incentive awards in the form of stock options and restricted stock to executives as part of our total compensation package. Consistent with our emphasis on pay-for-performance based incentive compensation, these awards represent a significant portion of total executive compensation. Based on the stage of our Company’s development and the incentives we aim to provide to our executives, we have chosen to use either stock options or a combination of stock options and restricted stock as our long- term equity incentive awards. Our decisions regarding the amount and type of long-term equity incentive compensation and relative weighting of these awards among total executive compensation have also been based on our understanding of market practices of similarly situated companies and our negotiations with our executives in connection with their initial employment or promotion by our Company.

Additionally, the Board of Directors adopted stock ownership guidelines for executives, including the named executive officers, and these guidelines are also considered when granting long-term equity incentive awards to executives. The ownership guidelines provide a target level of Company equity holdings with which named executive officers are expected to comply within five (5) years or the date the individual is first appointed as an executive. The target stock holdings are determined as a multiple of the named executive officer’s base salary (5x for the Chief Executive Officer and 3x for the other named executive officers) and then converted to a fixed number of shares using a 200-day average stock price. The following shares count in determining compliance with the stock ownership guidelines: (i) shares owned outright by the executive or his or her immediate family members residing in the same household; (ii) shares held in the Plug Power Inc. Savings and Retirement Plan; (iii) restricted stock issued as part of an executive’s

annual or other bonus whether or not vested; (iv) shares acquired upon the exercise of employee stock options; (v) shares underlying unexercised employee stock options times a factor of thirty-three percent; and (vi) shares held in trust. The named executive officers who are required to be in compliance with the stock ownership guidelines are in compliance.

Stock option awards provide our executive officers with the right to purchase shares of our common stock at a fixed exercise price typically for a period of up to ten years, subject to continued employment with our Company. Stock options are earned on the basis of continued service and generally vest over three years, beginning with one-third vesting on the first anniversary of the grant date, one- third vesting on the second anniversary of the grant date and the final one-third vesting on the third anniversary of the grant date, subject to acceleration in certain circumstances. Stock option awards are made pursuant to our Amended and Restated 2011 Stock Option and Incentive Plan. Except as may otherwise be provided in the applicable stock option award agreement, stock option awards become fully exercisable upon a change of control. The exercise price of each stock option is the information appearingclosing price of our common stock on the NASDAQ Capital Market as of the option grant date.

Grants to new hires and grants relating to an existing executive officer’s promotion may be made on a periodic basis. All grants to executive officers are approved by the Compensation Committee. We consider a number of factors in determining the number of stock options, if any, to grant to our executives, including:

·                  the number of shares subject to, and exercise price of, outstanding options, both vested and unvested, held by our named executive officers;

·                  the vesting schedule of the unvested stock options held by our named executive officers; and

·                  the amount and percentage of our total equity on a diluted basis held by our named executive officers.

Restricted stock awards provide our executive officers with a long-term incentive alternative to the stock option awards. Restricted stock awards vest subject to both continued employment of the executive by the Company and either time-based vesting or vesting based on satisfaction of specified performance objectives.

Broad-Based Benefits

All full-time employees, including our named executive officers, may participate in our health and welfare benefit programs, including medical, dental, and vision care coverage, disability insurance and life insurance, and our 401(k) plan.

Relationship of Executive Compensation to Risk

The Compensation Committee considers whether the design of the Company’s executive compensation program encourages senior executives to engage in excessive risk-taking. The Compensation Committee reviews the overall program design, as well as the balance between short-term and long-term compensation, the metrics used to measure performance and the award opportunity under the caption "Executive Compensation"Company’s incentive compensation program, and the implementation of other administrative features designed to mitigate risk such as vesting requirements and stock ownership guidelines as described above. Based on its review, the Compensation Committee believes that the Company’s executive compensation program is aligned to the interests of stockholders, appropriately rewards pay for performance, and does not promote unnecessary and excessive risk.

Our Executive Compensation Process

The Compensation Committee of our Board of Directors is responsible for determining the compensation for our named executive officers. The Compensation Committee is composed entirely of non-employee directors who are “independent” as that term is defined in the Company's definitive Proxy Statementapplicable NASDAQ rules. In determining executive compensation, our Compensation Committee annually reviews the performance of our executives with our Chief Executive Officer, and our Chief Executive Officer makes recommendations to our Compensation Committee with respect to the appropriate base salary, annual incentive bonuses and performance measures, and grants of long-term equity incentive awards for each of our executives. The Chairman of the Compensation Committee makes recommendations to the Compensation Committee with regards to the Chief Executive Officer’s compensation. The Compensation Committee makes its determination regarding executive compensation and then recommends such determination to the Board of Directors. The Board of Directors ultimately approves executive compensation.

As a result, the total amount of compensation that we paid to our executives, the types of executive compensation programs we maintained, and the amount of compensation paid to our executives under each program has been determined by our Compensation Committee and Board of Directors based on their understanding of the market, experience in making these types of decisions, and judgment regarding the appropriate amounts and types of executive compensation to provide.

Compensation Committee Report

The Compensation Committee has reviewed the Compensation Discussion required by Item 402(b) of Regulation S-K and Analysis and discussed that analysis with Management. Based on its review and discussions with Management, the Compensation Committee recommended to our Board of Directors that the Compensation Discussion and Analysis be included in this Amendment. This report on executive compensation for is provided by the undersigned members of the Compensation Committee of the Board of Directors.

Gary K. Willis (Chairman)

George C. McNamee

Douglas Hickey

Compensation Committee Interlocks and Insider Participation

During 2016, Annual MeetingMessrs. Willis (Chairman), McNamee and Hickey served as members of Stockholdersthe Compensation Committee. None of them had any relationship with the Company requiring disclosure under applicable rules and regulations of the SEC.

Summary Compensation

The following table sets forth information concerning compensation for services rendered in all capacities awarded to, beearned by or paid in the last three fiscal years to the Company’s named executive officers.

Name and
Principal
Position

 

Year

 

Salary
($)

 

Bonus
($)

 

Stock
Awards

($)

 

Option
Awards

($)

 

Non-Equity
Incentive Plan
Compensation

 ($)

 

All Other
Compensation
($) 

 

Total
($)

 

 

 

 

 

 

 

(1)

 

(2)

 

(3)

 

(4)

 

 

 

 

 

Andrew J. Marsh

 

2016

 

600,000

 

 

 

1,303,125

 

300,000

 

13,750

(5)

2,216,875

 

President, Chief

 

2015

 

600,000

 

 

 

1,475,000

 

450,000

 

13,766

(5)

2,538,750

 

Executive Officer and Director

 

2014

 

548,077

 

 

 

4,500,000

 

300,000

 

13,766

(5)

5,361,843

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Paul B. Middleton (6) 

 

2016

 

375,000

 

 

 

417,000

 

187,500

 

13,750

(7)

993,250

 

Chief Financial Officer

 

2015

 

375,000

 

 

 

491,750

 

281,250

 

40,750

(7)

1,188,750

 

and Senior Vice President

 

2014

 

43,269

 

263,990

 

141,600

 

727,500

 

 

129,510

(7)

1,305,869

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Jose Luis Crespo (8)

 

2016

 

220,000

 

—  

 

 

278,000

 

440,000

 

13,750

(9)

951,750

 

Vice President -

 

2015

 

220,000

 

—  

 

 

491,750

 

440,000

 

13,750

(9)

1,165,500

 

Global Sales

 

2014

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keith Schmid

 

2016

 

391,000

 

 

 

347,500

 

195,500

 

13,750

(10)

947,750

 

Chief Operating Officer and

 

2015

 

391,000

 

 

 

491,750

 

293,250

 

13,750

(10)

1,189,750

 

Senior Vice President

 

2014

 

317,500

 

 

 

1,800,000

 

167,500

 

52,232

(10)

2,337,232

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gerard L. Conway, Jr.

 

2016

 

280,000

 

 

 

208,500

 

105,000

 

13.750

(11)

607,250

 

General Counsel,

 

2015

 

280,000

 

 

 

393,400

 

157,500

 

13,750

(11)

844,650

 

Corporate Secretary and Senior Vice President

 

2014

 

265,000

 

 

 

1,125,000

 

105,000

 

13,526

(11)

1,508,526

 


(1)         This column represents the dollar amount of the sign-on bonus paid to Mr. Middleton in 2014.

(2)         This column represents the aggregate grant date fair value of the stock award computed in accordance with FASB ASC Topic 718. Pursuant to SEC rules, the amounts shown exclude the impact of estimated forfeitures. Fair value is calculated using the closing price of Plug Power common stock on the date of grant. For additional information on stock awards, refer to note 14 of the Company’s consolidated financial statements in the Form 10-K for the year ended December 31, 2016, as filed with the SecuritiesSEC. These amounts reflect the Company’s accounting expense, excluding the impact of estimated forfeitures, for these awards, and Exchange Commission.do not correspond to the actual value that will be recognized by the named executives.

(3) Item 12.    Security Ownership         This column represents the aggregate grant date fair value of Certain Beneficial Owners and Management and Related Stockholder Matters

        Incorporated herein by reference is the option award computed in accordance with FASB ASC Topic 718. Pursuant to SEC rules, the amounts shown exclude the impact of estimated forfeitures. For additional information appearing underon the caption "Principal Stockholders"valuation assumptions with respect to option awards, refer to note 14 of the Company’s consolidated financial statements in the Company's definitive Proxy StatementForm 10-K for itsthe year ended December 31, 2016, Annual Meeting of Stockholders to beas filed with the SecuritiesSEC. These amounts reflect the Company’s accounting expense, excluding the impact of estimated forfeitures, for these awards, and Exchange Commission.do not correspond to the actual value that will be recognized by the named executives.


(4)         This column represents the dollar amount of bonuses expected to be paid to executives under our non-equity plan.

(5)         Includes the Company’s share of contributions on behalf of Mr. Marsh to the Plug Power 401(k) savings plan in the amount of $13,250, $13,250 and $13,250, in the years ended 2016, 2015 and 2014, respectively, and payments of $500, $500, and $516 for supplemental life insurance premiums in each of the years ended December 31, 2016, 2015 and 2014, respectively.

(6)         Mr. Middleton was hired as Chief Financial Officer and Senior Vice President effective December 1, 2014.

(7)         Includes the Company’s share of contributions on behalf of Mr. Middleton to the Plug Power 401(k) savings plan in the amount of $13,250, 13,250 and $1,441 in the years ended December 31, 2016, 2015 and 2014, respectively, payment of $500, $500 and $180 for supplemental life insurance premiums in the years ended December 31, 2016, 2015 and 2014, respectively, and payment of $27,000 and $127,889 for moving and relocation expenses in the years ended December 31, 2015 and 2014.

Table(8)         Mr. Crespo became a named executive officer effective January 1, 2015.

(9)         Includes the Company’s share of Contentscontributions on behalf of Mr. Crespo to the Plug Power 401(k) savings plan in the amount of $13,250, $13,250 in the years ended December 31, 2016 and 2015, and payment of $500 and $500 for supplemental life insurance in the years ended December 31, 2016 and 2015.

SECURITIES AUTHORIZED FOR ISSUANCE UNDER EQUITY COMPENSATION PLANS(10)  Includes the Company’s share of contributions on behalf of Mr. Schmid to the Plug Power 401(k) savings plan in the amount of $13,250,  $13,250, and  $13,250, in the years ended December 31, 2016,  2015, and 2014, respectively, and payment of $500, $500,  and  $276, for supplemental life insurance premiums for the years ended December 31, 2016, 2015, and 2014, respectively, and payment of $38,706 for moving and relocation expenses for the year ended December 31, 2014.

 

(11)  Includes the Company’s share of contributions on behalf of Mr. Conway to the Plug Power 401(k) savings plan in the amount of $13,250, $13,250 and $13,250 in the years ended December 31, 2016, 2015 and 2014, respectively, payments of $500, $500, and $276 for supplemental life insurance premiums in each of the years ended December 31, 2016, 2015, and 2014, respectively.

Grants of Plan-Based Awards

 

 

 

 

 

 

 

 

All Other

 

 

 

 

 

 

 

 

 

 

 

 

 

Option

 

 

 

 

 

 

 

Estimated future

 

 

 

Awards:

 

 

 

Grant Date

 

 

 

payouts under

 

 

 

Number of

 

Exercise or

 

Fair Value

 

 

 

 non-equity incentive

 

 

 

Securities

 

Base Price of

 

of stock

 

 

 

plan awards

 

 

 

Underlying

 

Option

 

and option

 

Name

 

Threshold ($)

 

Target ($)

 

Grant Date

 

Options (#)

 

Awards ($/Sh)

 

Awards

 

 

 

 

 

 

 

 

 

(1)

 

(2)

 

(3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Andrew Marsh

 

600,000

 

600,000

 

08/09/16

 

937,500

 

1.39

 

1,303,125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Paul B. Middleton

 

243,750

 

375,000

 

08/09/16

 

300,000

 

1.39

 

417,000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Jose Luis Crespo

 

220,000

 

440,000

 

08/09/16

 

200,000

 

1.39

 

278,000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keith Schmid

 

254,100

 

391,000

 

08/09/16

 

250,000

 

1.39

 

347,500

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gerard L. Conway, Jr.

 

84,000

 

210,000

 

08/09/16

 

150,000

 

1.39

 

208,500

 


(1)         This column shows the number of stock options granted in 2016 to the named executives. These options generally vest and become exercisable ratably in three equal annual installments, beginning one year from the date of grant.

(2)         This column shows the per share exercise price for the stock options granted, which was the closing price of Plug Power common stock on the date of grant.

(3)         This column represents the aggregate grant date fair value of the stock awards and option awards computed in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 718. Pursuant to SEC rules, the amounts shown exclude the impact of estimated forfeitures. For additional information on the valuation assumptions with respect to option awards, refer to note 14 of the Company’s consolidated financial statements in the Form 10-K for the year ended December 31, 2016, as filed with the SEC. These amounts reflect the Company’s accounting expense for these awards, excluding the impact of estimated forfeitures, and do not correspond to the actual value that will be recognized by the named executives.

Outstanding Equity Awards at Fiscal Year-End

The following table givesprovides information on the holdings of stock options and stock awards by the named executive officers as of December 31, 2015,2016. For additional information about the option awards and stock awards, see the description of equity incentive compensation in the section titled “Compensation Discussion and Analysis.”

 

 

Option Awards

 

Stock Awards

 

Name

 

Number of
Securities
Underlying
Unexercised
Options
Exercisable

 

Number of
Securities
Underlying
Unexercised
Options
Unexercisable
(1)

 

Option
Exercise
Price

 

Option
Expiration
Date

 

Number of
Shares of
Stock That
Have Not
Vested

 

Market
Value of
Shares
Stock
That
Have Not
Vested

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Andrew Marsh

 

40,000

 

 

35.80

 

4/8/18

 

 

 

 

 

250

 

 

9.50

 

5/20/19

 

 

 

 

 

106,600

 

 

6.10

 

4/13/21

 

 

 

 

 

200,000

 

 

2.17

 

12/13/21

 

 

 

 

 

200,000

 

 

0.37

 

7/24/23

 

 

 

 

 

666,667

 

333,333

 

5.39

 

7/24/24

 

 

 

 

 

250,000

 

500,000

 

2.43

 

7/23/25

 

 

 

 

 

 

937,500

 

1.72

 

9/9/26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Paul B. Middleton

 

166,667

 

83,333

 

3.54

 

12/1/24

 

 

 

 

 

83,333

 

166,667

 

2.43

 

7/23/25

 

 

 

 

 

 

300,000

 

1.72

 

9/9/26

 

 

 

 

 

 

 

 

 

13,333

 

160,000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keith Schmid

 

400,000

 

 

0.57

 

10/23/23

 

 

 

 

 

266,667

 

133,333

 

5.39

 

7/24/24

 

 

 

 

 

83,333

 

166,667

 

2.43

 

7/23/25

 

 

 

 

 

 

 

250,000

 

1.72

 

8/9/26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gerard L. Conway, Jr.

 

3,000

 

 

37.50

 

2/14/17

 

 

 

 

 

2,700

 

 

26.00

 

1/24/18

 

 

 

 

 

250

 

 

9.50

 

5/20/19

 

 

 

 

 

41,000

 

 

6.10

 

4/13/21

 

 

 

 

 

16,666

 

 

2.17

 

12/13/21

 

 

 

 

 

133,333

 

 

0.37

 

7/24/23

 

 

 

 

 

166,667

 

83,333

 

5.39

 

7/24/24

 

 

 

 

 

66,667

 

133,333

 

2.43

 

7/23/25

 

 

 

 

 

 

150,000

 

1.72

 

8/9/26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Jose Luis Crespo

 

133,333

 

66,667

 

4.41

 

2/26/24

 

 

 

 

 

33,333

 

16,667

 

5.39

 

7/24/24

 

 

 

 

 

83,333

 

166,667

 

2.43

 

7/23/25

 

 

 

 

 

 

 

200,000

 

1.72

 

8/9/26

 

 

 


(1)         This column represents the number of shares that have not yet vested.

(2)         This column represents the market value of the unvested restricted stock awards using the stock price at the end of fiscal year 2016.

Option Exercises and Stock Vested in Fiscal 2016 Table

 

 

Option awards

 

Stock Award

 

Name

 

Number of 
shares acquired 
on exercise

 

Valued 
realized on 
exercise ($)

 

Number of 
shares acquired 
on exercise

 

Valued 
realized on 
exercise ($)

 

Andrew Marsh

 

 

$

 

122,222

 

$

218,777

 

Gerald L. Conway, Jr.

 

 

$

 

11,111

 

$

19,889

 

Paul B. Middleton

 

 

$

 

13,334

 

$

18,934

 

Employment Agreements

The Company and Mr. Marsh are parties to an employment agreement which renews automatically for successive one-year terms unless Mr. Marsh or the Company gives notice to the contrary. Mr. Marsh receives an annual base salary of $600,000 and is eligible to: (i) receive an annual incentive bonus of up to an amount equal to one hundred percent (100%) of his annual base salary; (ii) participate in all savings and retirement plans; and (iii) participate in all benefit and executive perquisites. Mr. Marsh’s employment may be terminated by the Company with or without “Cause”, as defined in the agreement, or by Mr. Marsh for “Good Reason”, as defined in the agreement, or without “Good Reason” upon written notice of termination to the Company. If Mr. Marsh’s employment is terminated by the Company for any reason other than Cause, death or disability, or in the event that Mr. Marsh terminates his employment with the Company and is able to establish “Good Reason”, the Company is obligated to pay Mr. Marsh the sum of the following amounts:

(a)                    one (1) times annual base salary and

(b)                    one (1) times the annual incentive bonus for the immediately preceding fiscal year.

In addition, as of the date of termination, any restricted stock, stock options and other stock awards held by Mr. Marsh will accelerate vesting as if he had remained an employee for an additional twelve (12) months following the date of termination. Further, the Company is required to continue paying for health insurance and other benefits for Mr. Marsh and his eligible family members for twelve (12) months following his termination. The agreement also provides, among other things, that if, within twelve (12) months after a “Change in Control”, as defined in the agreement, the Company terminates Mr. Marsh’s employment without Cause, then he is be entitled to:

(i)            receive a lump sum payment equal to three (3) times the sum of (1) his current annual base salary plus (2) his average annual incentive bonus over the three (3) fiscal years prior to the Change in Control (or his annual incentive bonus for the fiscal year immediately preceding to the Change of Control, if higher),

(ii)           accelerated vesting of his stock options and other stock-based awards that would have vested had he remained an active employee for twelve (12) months following his termination, and

(iii)          receive benefits, including health and life insurance for twelve (12) months following the Change of Control.

The Company and Messrs. Middleton, Schmid, Conway, and Crespo are parties to Executive Employment Agreements pursuant to which if any of their employment is terminated by the Company for any reason other than “Cause”, as defined in the agreement, death or disability, or in the event that any terminates his

employment with the Company and is able to establish “Good Reason”, as defined in the agreement, the Company is obligated to pay each an amount equal to his annual base salary.  In addition, as of the date of termination, any restricted stock, stock options and other stock awards held by each will accelerate vesting as if he had remained an employee for an additional twelve (12) months following the date of termination. Further, the Company is required to continue paying for a portion of health insurance for each and his eligible family members for twelve (12) months following his termination.

In addition, Messrs. Middleton, Schmid, Conway and Crespo are entitled to exercise any vested stock options for twelve (12) months following the date of termination and the Company is required to continue paying health insurance and other benefits to each and his eligible family members for twelve (12) months following his termination. The Executive Employment Agreements also provide, among other things, that if, within twelve (12) months after a “Change in Control”, as defined in the agreement, the Company terminates such executive’s employment without Cause, then such executive shall be entitled to:

(i)             receive a lump sum payment equal to the sum of (1) his average annual base salary over the three (3) fiscal years immediately prior to the Change of Control (or the executive’s annual base salary in effect immediately prior to the Change of Control, if higher) and (2) his average annual bonus over the three (3) fiscal years prior to the Change in Control (or the executive’s annual bonus in effect immediately prior to the Change of Control, if higher),

(ii)          accelerated vesting of his stock options and other stock-based awards that would have vested had he remained an active employee for twelve (12) months following his termination, and

(iii)       receive benefits, including health and life insurance for twelve (12) months following the Change of Control.

The Company and Messrs. Marsh, Middleton, Schmid, Conway and Crespo are parties to employment agreements, respectively, that provide for a potential payment upon termination of employment other than for “Cause” as discussed above in Employment Agreements.

Such payments by the Company to any of the executives are subject to the executive signing a general release of claims in a form and manner satisfactory to the Company. An executive is not entitled to receive any such payment in the event he breaches the Employee Patent, Confidential Information and Non-Compete Agreement referenced in the executive’s respective agreement or any non-compete, non-solicit or non-disclosure covenants in any agreement between the Company and such executive. We agreed to provide severance payments to such executives in these circumstances based on our negotiations with each of our executives at the time they joined our Company, or as negotiated subsequent to hiring, and in order to provide a total compensation package that we believed to be competitive. Additionally, we believe that providing severance upon a termination without cause can help to encourage our executives to take the risks that we believe are necessary for our Company to succeed and also recognizes the longer hiring process typically involved in hiring a senior executive.

If Mr. Marsh had been terminated without cause on December 31, 2016, the approximate value of the severance package, including, as mentioned above in Employment Agreements, salary, benefits and equity awards, under his employment agreement would have been $1,093,088. If Mr. Middleton, Mr. Schmid, Mr. Conway, or Mr. Crespo had been terminated without cause on December 31, 2016, the approximate value of the severance packages, including, as mentioned above in Employment Agreements, salary, benefits and equity awards, under the employment agreement for such named executive would have been: Mr. Middleton—$689,762, Mr. Schmid—$718,685,  Mr. Conway—$465,236, and Mr. Crespo - $677,241.

The Company and Messrs. Marsh, Middleton, Schmid, Conway, and Crespo are parties to employment agreements, respectively, that provide for a potential payment upon a “Change of Control”, as discussed above in Employment Agreements. Such payments by the Company to any of the executives are subject to the executive signing a general release of claims in a form and manner satisfactory to the Company. An executive is not entitled to receive any such payment in the event he breaches the Employee Patent, Confidential Information and Non-Compete Agreement referenced in the executive’s respective agreement or any non-compete, non-solicit or non- disclosure covenants in any agreement between the Company and such executive.

We agreed to provide payments to these executives in these circumstances in order to provide a total compensation package that we believed to be competitive. Additionally, the primary purpose of our equity-based incentive awards is to align the interests of our executives and our stockholders and provide our executives with strong incentives to increase stockholder value over time. As change- in-control transactions typically represent events where our stockholders are realizing the value of their equity interests in our Company, we believe it is appropriate for our executives to share in this realization of stockholder value, particularly where their employment is terminated in connection with the change-in-control transaction. We believe that this will also help to better align the interests of our executives with our stockholders in pursuing and engaging in these transactions.

If a change-in-control had occurred on December 31, 2016 and on that date Mr. Marsh, Mr. Middleton, Mr. Schmid, Mr. Conway, or Mr. Crespo had been terminated without Cause, experienced a material negative change in his or her compensation or responsibilities or was required to be based at a location more than fifty (50) miles from his or her current work location, the value of the change-of- control payments and benefits under the employment agreements for each such named executive would have been as follows: Mr. Marsh—$3,170,973, Mr. Middleton—$672,127, Mr. Schmid—$699,460, Mr. Conway—$451,082 and Mr. Crespo - $667,216. The employment agreements provide for a modified cutback of the payments in the event that the total value of all change in control benefits exceed the maximum benefit that allows for a tax deduction for the Company under Section 280G of the Internal Revenue Code of 1986, as amended. The foregoing numbers do not reflect any cutback.

ITEM 12.     SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The following table sets forth information regarding the beneficial ownership of Common Stock as of April 28, 2017 (except as otherwise indicated) by:

·                  all persons known by us to have beneficially owned 5% or more of the Common Stock;

·                  each director of the Company;

·                  the named executive officers; and

·                  all directors and executive officers as a group.

The beneficial ownership of the stockholders listed below is based on publicly available information and from representations of such stockholders.

 

 

Shares Beneficially Owned (2)

Name and Address of Beneficial Owner (1)

 

Number

 

Percentage (%)

 

Black Rock, Inc. (3)(1)

 

11,820,396

 

5.3

%

Johannes Minoh Roth (4) 

 

3,003,396

 

*

 

Andrew Marsh (5) 

 

1,989,409

 

*

 

George C. McNamee (6) 

 

994,279

 

*

 

Keith Schmid (7) 

 

786,587

 

*

 

Gerard L. Conway, Jr. (8) 

 

488,648

 

*

 

Gary K. Willis (9) 

 

441,861

 

*

 

Larry G. Garberding (10) 

 

387,714

 

*

 

Jose Luis Crespo (11)

 

332,236

 

*

 

Maureen O. Helmer(12)

 

328,777

 

*

 

Paul B. Middleton(13)

 

282,213

 

*

 

Douglas Hickey (14)

 

197,673

 

*

 

Gregory Kenausis (15)

 

188,073

 

*

 

Xavier Pontone (16)

 

136,161

 

*

 

Lucas Schneider

 

 

*

 

All executive officers and directors as a group (14 persons) (17)

 

9,557,027

 

4.3

%


*        Represents less than 1% of the outstanding shares of Common Stock

(1)                 Unless otherwise indicated by footnote, the mailing address for each stockholder is c/o Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110.

(2)                 The number of shares beneficially owned by each stockholder is determined under rules promulgated by the SEC and includes voting or investment power with respect to securities. Under Rule 13d-3 under the Securities Exchange Act of 1934, as amended, beneficial ownership includes any shares to which the individual or entity has sole or shared voting power or investment power and includes any shares as to which the individual or entity has the right to acquire beneficial ownership within 60 days of April 28, 2017, through the exercise of any warrant, stock option or other right. The inclusion in this table of such shares, however, does not constitute an admission that the named stockholder is a direct or indirect beneficial owner of such shares. The number of shares of Common Stock outstanding used in calculating the percentage for each listed person includes the shares of Common Stock underlying options, warrants or other rights held by such person that may be issuedare exercisable within 60 days of April 28, 2017 but excludes shares of Common Stock underlying options, warrants or other rights held by any other person. Percentage of beneficial ownership is based on 223,440,581 shares of Common Stock outstanding as of April 28, 2017. Unless otherwise indicated, each of the stockholders has sole voting and investment power with respect to the shares of Common Stock beneficially owned by the stockholder.

(3)                 Information is based on a Schedule 13G filed with the SEC on January 25, 2017.  The address of the principal business office of BlackRock, Inc. is 55 East 52nd Street, New York, NY 10055.

(4)                Includes (a) 145,000 shares of Common Stock issuable upon the exercise of outstanding options and restricted stock under(b) 2,782,075 shares of Common Stock issuable upon conversion of Series C Redeemable Convertible Preferred Stock owned by Five T Capital Holding AG, of which Mr. Roth is the Company's 1999Managing Director and Chairman, and Five More Special Situations Fund Limited, of which Mr. Roth has equity interests. Mr. Roth disclaims beneficial ownership of the shares of Series C Preferred Stock Optiondirectly held by Five T Capital Holding AG and Incentive Plan, as amended (1999Five More Special Situations Fund Limited, except to the extent of his pecuniary interest therein, if any, and this disclosure shall not be deemed an admission that Mr. Roth is the beneficial owner of any of such shares.

(5)                 Includes 1,463,517 shares of Common Stock Option Plan), and the Company's 2011issuable upon exercise of outstanding options.

(6)                 Includes 202,500 shares of Common Stock Option and Incentive Plan (2011 Stock Option Plan).


Equity Compensation Plan Information

Plan Category
 Number of shares to be
issued upon exercise of
outstanding options,
warrants and rights
(a)
 Weighted average
exercise price of
outstanding options,
warrants and rights
(b)
 Number of shares
remaining for future
issuance under equity
compensation plans
(excluding shares
reflected in column (a))
(c)
 

Equity compensation plans approved by security holders

  11,228,563(1)$3.33  4,347,284(2)

Equity compensation plans not approved by security holders

  676,667(3)$1.64   

Total

  11,905,230     4,347,284 

(1)
Represents 524,329issuable upon exercise of outstanding options, issued under the 1999 Stock Option Plan, 10,526,457 outstanding options issued under the 2011 Stock option Plan and 177,777365,000 shares of restricted stock issued under the 2011Common Stock Option Plan.

(2)
held by a family trust.

(7)Includes 750,000 shares available for future issuance under the 2011of Common Stock Option Plan.

(3)
Included in Equity compensation plans not approved by shareholders areissuable upon exercise of outstanding options.

(8)                 Includes 427,283 shares granted to new employees for key positions within the Company. No specificof Common Stock issuable upon exercise of outstanding options.

(9)                 Includes 179,500 shares have been allocated for this purpose, but rather equity awards are approved by the Company'sof Common Stock issuable upon exercise of outstanding options.

(10)          Includes 190,000 shares of Common Stock issuable upon exercise of outstanding options.

(11)          Includes 316,666 shares of Common Stock issuable upon exercise of outstanding options.

(12)          Includes 173,500 shares of Common Stock issuable upon exercise of outstanding options.

(13)          Includes 250,000 shares of Common Stock issuable upon exercise of outstanding options.

(14)         Includes 161,000 shares of Common Stock issuable upon exercise of outstanding options

(15)         Includes 135,000 shares of Common Stock issuable upon exercise of outstanding options

(16)         Includes 105,000 shares of Common Stock issuable upon exercise of outstanding options

(17)         Includes 4,498,966 shares of Common Stock issuable upon exercise of outstanding options

 ITEM 13.          CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The Company’s Board of Directors has adopted a related party transaction policy that requires the

Company’s General Counsel, together with outside counsel as necessary, to evaluate potential transactions between

the Company and any related party prior to entering into any such transaction. Certain related party transactions may require the approval of the Board of Directors and its Audit Committee. The policy defines a “related party” as: (i) the Company’s directors or executive officers, (ii) the Company’s director nominees, (iii) security holders known to the Company to beneficially own more than 5% of any class of the Company’s voting securities, or (iv) the immediate family members of any of the persons listed in specific circumstances.

Item 13.    Certain Relationships and Related Transactions, and Director Independence
items (i) — (iii). A person’s “immediate family” includes such person’s child, stepchild, parent, stepparent, spouse, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law, brother-in-law, sister-in-law or any other person (other than a tenant or employee) sharing the household of such person.

 Incorporated

Other than as otherwise disclosed herein, by referencesince January 1, 2016, the Company has not entered into, and there is the information appearingnot currently proposed, any transactions or series of similar transactions involving an amount in excess of $120,000 in which any related party had or will have a direct or indirect material interest.

DIRECTOR INDEPENDENCE

The Board of Directors has determined that Ms. Helmer and Messrs. Garberding, Schneider, McNamee, Willis, Hickey, Roth and Kenausis are independent directors as defined in Rule 5605(a)(2) under the caption "Principal Stockholders" inMarketplace Rules of the Company's definitive Proxy Statement for its 2016 Annual MeetingNational Association of Stockholders to be filed with the Securities and Exchange Commission.

Item 14.    Principal Accounting Fees and Services
Dealers, Inc. (the “NASDAQ Rules”).

 Incorporated herein by reference

Audit Committee

The Audit Committee consists of Messrs. Garberding (Chair), Willis, Roth, Kenausis, and Ms. Helmer, each of which is the information appearingan independent director under the caption "Independent Auditors Fees" inNASDAQ Rules.

Compensation Committee

The Compensation Committee consists of Messrs. Willis (Chair), McNamee and Hickey, each of whom is an independent director under the Company's definitive Proxy StatementNASDAQ Rules.

Corporate Governance and Nominating Committee

The Corporate Governance and Nominating Committee (the “Governance Committee”) consists of Ms. Helmer (Chair) and Messrs. Garberding and Hickey, each of whom is an independent director under the NASDAQ Rules.

ITEM 14.             PRINCIPAL ACCOUNTING FEES AND SERVICES

The following table presents fees for its 2016 Annual Meetingprofessional services rendered by KPMG for the integrated audit of Stockholders to be filed with the Securities and Exchange Commission.


Table of Contents


PART IV

Item 15.    Exhibits and Financial Statement Schedules

    15(a)(1) Financial Statements

        TheCompany’s annual financial statements and notesinternal control over financial reporting and fees billed for other services rendered by KPMG:

 

 

2016

 

2015

 

Audit Fees

 

$

617,000

 

$

772,250

 

Audit-Related Fees

 

$

120,000

 

$

10,500

 

Tax Fees

 

 

 

Other

 

 

 

Total

 

$

737,000

 

$

782,750

 

In the above table, and in accordance with SEC definitions and rules: (1) “audit fees” are listedfees for professional services for the audit of the Company’s consolidated financial statements included in Form 10-K,

audit of the IndexCompany’s internal controls over financial reporting, review of unaudited interim consolidated financial statements included in Form 10-Qs, or for services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements; (2) “audit-related fees” are fees for assurance and related services that are reasonably related to Consolidated Financial Statements on page F-1the performance of this Report.

    15(a)(2) Financial Statement Schedules

        Thethe audit or review of the Company’s consolidated financial statement schedulesstatements; (3) “tax fees” are listed in the Index to Consolidated Financial Statements on page F-1 of this Report.

        Allfees for tax compliance, tax advice, and tax planning; and (4) “all other schedulesfees” are fees for any services not filed herein have been omitted as they are not applicable or the required information or equivalent information has been included in the Consolidated Financial Statements orfirst three categories.

The Audit Committee approved all audit and non-audit services provided to the notes thereto.Company by KPMG during Fiscal 2016.

    15(a)(3) ExhibitsPart IV

 Exhibits are as set forth in the "List of Exhibits" which immediately precedes the Index to Consolidated Financial Statements on page F-1 of this Report.


ITEM 15.             EXHIBITS, FINANCIAL STATEMENTS SCHEDULES

Table of Contents(a)


SIGNATURES
Exhibits:

 

See Exhibit Index incorporated into this item by reference.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

PLUG POWER INC.




By:



/s/    ANDREW MARSH


Andrew Marsh,

President, Chief Executive Officer and Director

Date: March 14, 2016


POWER OF ATTORNEY

        KNOW ALL MEN BY THESE PRESENTS that each individual whose signature appears below constitutes and appoints each of Andrew Marsh, Paul B. Middleton and Gerard L. Conway, Jr. such person's true and lawful attorney-in-fact and agent with full power of substitution, for such person and in such person's name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission, 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, as fully to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that any said attorney-in-fact and agent, or any substitute or substitutes of any of them, may lawfully do or cause to be done by virtue hereof.

Date: March 14, 2016

        Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.








Director

/s/ ANDREW MARSH

Andrew Marsh

Date:  May 1, 2017

President, Chief Executive Officer and Director
(Principal Executive Officer)
March 14, 2016

/s/ PAUL B. MIDDLETON

Paul B. Middleton


Chief Financial Officer
(Principal Financial Officer)



March 14, 2016


/s/ LARRY G. GARBERDING

Larry G. Garberding


Director



March 14, 2016


/s/ MAUREEN O. HELMER

Maureen O. Helmer


Director



March 14, 2016


Table of Contents

/s/ DOUGLAS T. HICKEY

Douglas T. Hickey
DirectorMarch 14, 2016

/s/ GREGORY L. KENAUSIS

Gregory L. Kenausis


Director



March 14, 2016


/s/ GEORGE C. MCNAMEE

George C. McNamee


Director



March 14, 2016


/s/ XAVIER PONTONE

Xavier Pontone


Director



March 14, 2016


/s/ JOHANNES MINHO ROTH

Johannes Minho Roth


Director



March 14, 2016


/s/ GARY K. WILLIS

Gary K. Willis


Director



March 14, 2016


Table of Contents

Certain exhibits indicated below are incorporated by reference to documents of Plug Power on file with the Commission. Exhibits nos. 10.1, 10.5 through 10.9 and 10.13 through 10.19 represent the management contracts and compensation plans and arrangements required to be filed as exhibits to this Annual Report on Form 10-K.

Exhibit No.
and Description

Exhibit No.
and Description

3.1

3.1

Amended and Restated Certificate of Incorporation of Plug Power Inc.(1)



3.2


3.2


Certificate of Amendment to Amended and Restated Certificate of Incorporation of Plug Power Inc.(1)



3.3


3.3


Second Certificate of Amendment of Amended and Restated Certificate of Incorporation of Plug Power Inc.(2)



3.4


3.4


Third Certificate of Amendment to Amended and Restated Certificate of Incorporation of Plug Power Inc.(3)



3.5


3.5


Certificate of Designations, Preferences and Rights of a Series of Preferred Stock of Plug Power Inc. classifying and designating the Series A Junior Participating Cumulative Preferred Stock.(4)



3.6


3.6


Certificate of Designations, Preferences and Rights of a Series of Preferred Stock of Plug Power Inc. classifying and designating the Series C Redeemable Convertible Preferred Stock.(5)



3.7


3.7


Third Amended and Restated By-laws of Plug Power Inc.(6)



4.1


3.8


Certificate of Designations, Preferences and Rights of a Series of Preferred Stock of Plug Power Inc. classifying and designating the Series D Redeemable Convertible Preferred Stock.(7)

4.1

Specimen certificate for shares of common stock, $.01 par value, of Plug Power.(7)(8)



4.2


4.2


Shareholder Rights Agreement, dated as of June 23, 2009, between Plug Power Inc. and Registrar and American Stock Transfer & Trust Company, LLC, as Rights Agent.(4)



4.3


4.3


Amendment No. 1 To Shareholder Rights Agreement.(8)(9)



4.4


4.4


Amendment No. 2 To Shareholder Rights Agreement.(9)(10)



4.5


4.5


Amendment No. 3 To Shareholder Rights Agreement.(10)(11)



4.6


4.6


Amendment No. 4 To Shareholder Rights Agreement.(11)(12)



4.7


4.7


Amendment No. 5 To Shareholder Rights Agreement.(12)(13)



4.8



Form of Warrant.(13)


4.8


4.9


Amendment No. 6 To Shareholder Rights Agreement (7)


4.8

Form of Warrant.(14)



4.10


4.9


Form of Warrant.(15)

4.10

Form of Warrant.(5)



10.1


4.11


Form of Warrant (11)

10.1

Employee Stock Purchase Plan.(7)(8)



10.2


10.2


Registration Rights Agreement, dated as of June 29, 2006, by and between Plug Power Inc. and Smart Hydrogen Inc.(15)(16)



10.3


10.3


Form of Director Indemnification Agreement.(15)(16)



10.4


10.4


Form of Director Indemnification Agreement(16)Agreement(17)



10.5


10.5


Plug Power Executive Incentive Plan.(17)


Table of Contents(18)

10.6

10.6

Employment Agreement, dated as of April 7, 2008, by and between Andrew Marsh and Plug Power Inc.(18)(19)



10.7


10.7


Executive Employment Agreement, dated as of May 5, 2008, by and between Gerard L. Conway, Jr. and Plug Power Inc.(19)(20)



10.8


10.8


Executive Employment Agreement, dated as of October 23. 2013, by and between Keith C. Schmid and Plug Power Inc.(16)(17)



10.9


10.9


Executive Employment Agreement, dated as of November 6, 2014, by and between Paul B. Middleton and Plug Power Inc.(20)(21)



10.10


10.10


Standstill and Support Agreement, dated as of May 6, 2011 among Plug Power Inc., OJSC "INTER“INTER RAO UES"UES” and OJSC "Third“Third Generation Company of the Wholesale Electricity Market"Market”.(21)(22)



10.11


10.11


Master and Shareholders'Shareholders’ Agreement, dated as of January 24, 2012, by and between Axane S.A. and Plug Power, Inc.(22)(23)



10.12


10.12


License Agreement dated as of February 29, 2012, by and between HyPulsion, S.A.S. and Plug Power Inc.(22)(23)



10.13


10.13


2011 Stock Option and Incentive Plan.(21)(22)



10.14


10.14


Amendment No. 1 to the Plug Power Inc. 2011 Stock Option and Incentive Plan(23)Plan(24)



10.15


10.15


Amended and Restated 2011 Stock Option and Incentive Plan.(3)



10.16


10.16


Form of Incentive Stock Option Agreement.(24)(25)



10.17


10.17


Form of Non-Qualified Stock Option Agreement for Employees.(24)(25)



10.18


10.18


Form of Non-Qualified Stock Option Agreement for Independent Directors.(24)(25)



10.19


10.19


Form of Restricted Stock Award Agreement.(25)(26)



10.20


10.20


Purchase and Sale Agreement dated as of January 24, 2013, by Plug Power Inc. and 968 Albany Shaker Road Associates, LLC(25)LLC(26)



10.21


10.21


Amendment to Purchase and Sale Agreement dated as of March 13, 2013 by Plug Power Inc. and 968 Albany Shaker Road Associates, LLC(25)LLC(26)


10.22


10.22



Securities Purchase Agreement, dated as of May 8, 2013, by and between Plug Power Inc. and Air Liquide Investissements d'Avenird’Avenir et de Demonstration (12)(13)



10.23


10.23


Registration Rights Agreement, dated as of May 16, 2013, by and between Plug Power Inc. and Air Liquide Investissements d'Avenird’Avenir et de Demonstration(5)



            10.24


10.24


Loan Agreement dated as of March 2, 2016 by and among Plug Power Inc., Emerging Power Inc., Emergent Power Inc. and Generate Lending, LLC(27)LLC(29)



23.1


10.25


Loan and Security Agreement dated as of June 27, 2016 by and among Plug Power Inc., Emerging Power Inc., Emergent Power Inc. and Hercules Capital, Inc.(30)

10.26

Loan and Security Agreement dated as of December 23, 2016 by and among Plug Power Inc., Emerging Power Inc., Emergent Power Inc. and NY Green Bank, a Division of the New York State Energy Research & Development Authority(31)

23.1

Consent of KPMG LLP.(26)(27)



31.1 and 31.2



Certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.(26)(27)



31.3 and 31.4

Certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.(28)

32.1 and 32.2



Certifications pursuant to 18 U.S.C. Section 1350, adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.(26)(27)



101.INS


101.INS


XBRL Instance Document(26)Document(27)



101.SCH


101.SCH


XBRL Taxonomy Extension Schema Document(26)Document(27)



101.CAL


101.CAL


XBRL Taxonomy Extension Calculation Linkbase(26)


Table of ContentsLinkbase(27)

101.DEF

101.DEF

XBRL Taxonomy Extension Definition Linkbase Document(26)Document(27)



101.LAB


101.LAB


XBRL Taxonomy Extension Label Linkbase Document(26)Document(27)



101.PRE


101.PRE


XBRL Taxonomy Extension Presentation Linkbase Document(26)Document(27)


(1)

Incorporated by reference to the Company'sCompany’s Form 10-K for the period ended December 31, 2008, filed with the SEC on March 16, 2009

(2)

Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 19, 2011.

(3)

Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated July 25, 2014.

(4)

Incorporated by reference to the Company'sCompany’s Registration Statement on Form 8-A dated June 24, 2009.

(5)

Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 20, 2013.

(6)

Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated October 28, 2009.

(7)

Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated December 21, 2016.

(8)         Incorporated by reference to the Company’s Registration Statement on Form S-1/A (File Number 333-86089).

(8)

(9)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 6, 2011.

(9)

(10)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated March 19, 2012.

(10)

(11)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated March 26, 2012.

(11)

(12)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated February 13, 2013.

(12)

(13)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 8, 2013.

(13)

(14)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 24, 2011.

(14)

(15)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated February 14, 2013.

(15)

(16)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated June 29, 2006.

(16)

(17)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated October 29, 2013.

(17)

(18)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated February 15, 2007.

(18)

(19)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated April 2, 2008.

(19)

(20)Incorporated by reference to the Company'sCompany’s Form 10-Q for the period ended June 30, 2008, filed with the SEC on August 7, 2008.

(20)

(21)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated November 11, 2014

(21)

(22)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 12, 2011.

(22)

(23)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated March 21, 2012.

(23)

(24)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated May 18, 2012.

(24)

(25)Incorporated by reference to the Company'sCompany’s Form 10-Q for the period ended June 30, 2011, filed with the SEC on August 11, 2011.

(25)

(26)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated April 1, 2013.

(26)

(27)  Previously filed with the Original Form 10-K.

(28)Filed herewith

(27)
herewith.

(29)Incorporated by reference to the Company'sCompany’s current Report on Form 8-K dated March 4, 2016


2016.

Table of Contents(30)

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS


Page

Report of Independent Registered Public Accounting Firm

F-2

Consolidated balance sheets as of December 31, 2015 and 2014

F-3

Consolidated statements of operations for the years ended December 31, 2015, 2014, and 2013

F-4

Consolidated statements of comprehensive loss for the years ended December 31, 2015, 2014, and 2013

F-5

Consolidated statements of stockholders' equity (deficit) for the years ended December 31, 2015, 2014 and 2013

F-6

Consolidated statements of cash flows for the years ended December 31, 2015, 2014, and 2013

F-7

Notes  Incorporated by reference to consolidated financial statements

F-8

Table of Contents

Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders
Plug Power Inc.:

         We have audited the accompanying consolidated balance sheets of Plug Power Inc. and subsidiaries (the "Company") as of December 31, 2015 and 2014, and the related consolidated statements of operations, comprehensive loss, stockholders' equity (deficit), and cash flows for each of the years in the three-year period ended December 31, 2015. We also have audited the Company's internal control over financial reporting as of December 31, 2015, based on criteria established inInternal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's AnnualCompany’s current Report on Internal Control over Financial Reporting (Item 9A). Our responsibility is to express an opinion on these consolidated financial statements and an opinion on the Company's internal control over financial reporting based on our audits.Form 8-K dated June 30, 2016.

 We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the consolidated financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made

(31)  Incorporate by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

         A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertainreference to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effectCompany’s current Report on the financial statements.

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

         In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Plug Power Inc. and subsidiaries as ofForm 8-K dated December 31, 2015 and 2014, and the results of their operations and their cash flows for each of the years in the three-year period ended December 31, 2015, in conformity with U.S. generally accepted accounting principles. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established inInternal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).23, 2016.

         The scope of management's assessment of internal control over financial reporting excluded the internal control over financial reporting of Hypulsion U.S. Holding, Inc. ("HyPulsion"), which the Company acquired in July 2015. HyPulsion represented 7.3% of total assets and 0.3% of total revenue included in the Company's consolidated financial statements as of and for the year ended December 31, 2015. Our audit of internal control over financial reporting of the Company also excluded an evaluation of the internal control over financial reporting of HyPulsion.

/s/ KPMG LLP

Albany, New York
March 14, 2016


Table of Contents


PLUG POWER INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share amounts)

 
 December 31,
2015
 December 31,
2014
 

Assets

 

Current assets:

       

Cash and cash equivalents

 $63,961 $146,205 

Restricted cash

  
4,012
  
 

Accounts receivable

  22,650  16,095 

Inventory

  32,752  24,736 

Prepaid expenses and other current assets

  7,855  5,710 

Total current assets

  131,230  192,746 

Restricted cash

  43,823  500 

Property, plant, and equipment

  7,255  5,312 

Leased property under capital lease

  1,667  1,937 

Note receivable

  383  447 

Goodwill

  8,478   

Intangible assets, net

  4,644  1,490 

Other assets

  11,976  1,719 

Total assets

 $209,456 $204,151 

Liabilities, Redeemable Preferred Stock, and Stockholders' Equity

 

Current liabilities:

       

Accounts payable

 $20,455 $10,185 

Accrued expenses

  9,852  8,750 

Product warranty reserve

  406  1,311 

Accrual for loss contracts related to service

  4,100   

Deferred revenue

  4,468  3,319 

Obligations under capital lease

    587 

Other current liabilities

  3,425  1,555 

Total current liabilities

  42,706  25,707 

Accrual for loss contracts related to service

  5,950   

Deferred revenue

  13,997  6,772 

Common stock warrant liability

  5,735  9,418 

Finance obligations

  14,809  2,426 

Other liabilities

  370  392 

Total liabilities

  83,567  44,715 

Redeemable preferred stock

       

Series C redeemable convertible preferred stock, $0.01 par value per share (aggregate involuntary liquidation preference $16,664) 10,431 shares authorized; Issued and outstanding: 5,231 at December 31, 2015 and December 31, 2014

  1,153  1,153 

Stockholders' equity:

       

Common stock, $0.01 par value per share; 450,000,000 shares authorized; Issued (including shares in treasury):

       

180,567,444 at December 31, 2015 and 173,644,532 at December 31, 2014           

  1,806  1,736 

Additional paid-in capital

  1,118,917  1,096,392 

Accumulated other comprehensive income

  798  898 

Accumulated deficit

  (993,876) (938,081)

Less common stock in treasury:

       

479,953 at December 31, 2015 and 378,116 at December 31, 2014

  (2,909) (2,662)

Total stockholders' equity

  124,736  158,283 

Total liabilities, redeemable preferred stock, and stockholders' equity

 $209,456 $204,151 

 

See accompanying notes to consolidated financial statements.28


Table of Contents


PLUG POWER INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

For the years ended December 31, 2015, 2014 and 2013

(In thousands, except share and per share amounts)


 
 2015 2014 2013 

Revenue:

          

Sales of fuel cell systems and related infrastructure          

 $78,002 $48,306 $18,446 

Services performed on fuel cell systems and related infrastructure

  14,012  9,909  6,659 

Power Purchase Agreements

  5,718  2,137   

Fuel delivered to customers

  5,075  1,959   

Other

  481  1,919  1,496 

Total revenue

  103,288  64,230  26,601 

Cost of revenue:

          

Sales of fuel cell systems and related infrastructure          

  67,703  43,378  20,414 

Services performed on fuel cell systems and related infrastructure

  22,937  19,256  14,929 

Provision for loss contracts related to service

  10,050     

Power Purchase Agreements

  5,253  1,052   

Fuel delivered to customers

  6,695  2,204   

Other

  540  3,202  2,506 

Total cost of revenue

  113,178  69,092  37,849 

Gross loss

  
(9,890

)
 
(4,862

)
 
(11,248

)

Operating expenses:

  
 
  
 
  
 
 

Research and development

  14,948  6,469  3,121 

Selling, general and administrative

  34,164  26,601  14,596 

Total operating expenses

  49,112  33,070  17,717 

Operating loss

  
(59,002

)
 
(37,932

)
 
(28,965

)

Interest and other income

  
157
  
752
  
150
 

(Loss) gain on acquisition activity, net

  (116) 1,014   

Change in fair value of common stock warrant liability

  3,661  (52,260) (37,102)

Interest and other expense

  (390) (387) (398)

Gain on sale of equity interest in joint venture

      3,235 

Loss before income taxes

 $(55,690)$(88,813)$(63,080)

Income tax benefit

  
  
325
  
410
 

Net loss attributable to the Company

 $(55,690)$(88,488)$(62,670)

Preferred stock dividends declared

  
(105

)
 
(156

)
 
(121

)

Net loss attributable to common shareholders

 $(55,795)$(88,644)$(62,791)

Net loss per share:

          

Basic and diluted

 $(0.32)$(0.56)$(0.82)

Weighted average number of common shares outstanding

  176,067,231  159,228,815  76,436,408 

See accompanying notes to consolidated financial statements.


Table of Contents


PLUG POWER INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

For the years ended December 31, 2015, 2014 and 2013

(In thousands)

 
 2015 2014 2013 

Net loss attributable to the Company

 $(55,690)$(88,488)$(62,670)

Other comprehensive loss—foreign currency translation adjustment

  (100)   (107)

Comprehensive loss

 $(55,790)$(88,488)$(62,777)

See accompanying notes to consolidated financial statements.


Table of Contents


PLUG POWER INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT)

For the years ended December 31, 2015, 2014 and 2013

(In thousands, except share and per share amounts)

 
 Common Stock  
 Accumulated
Other
Comprehensive
Income
 Treasury Stock  
 Total
Stockholders'
Equity
(Deficit)
 
 
 Additional
Paid-in-
Capital
 Accumulated
Deficit
 
 
 Shares Amount Shares Amount 

December 31, 2012

  38,404,764  384  801,840  1,005  165,906  (1,552) (786,645) 15,032 

Net loss attributable to the Company

              (62,670) (62,670)

Other comprehensive loss

        (107)       (107)

Stock-based compensation

  2,198,154  22  2,128          2,150 

Stock dividend

  156,853  2  120           (122)  

Public offering, common stock, net

  43,101,800  431  9,991          10,422 

Exercise of warrants

  22,494,987  225  17,077          17,302 

December 31, 2013

  106,356,558  1,064  831,156  898  165,906  (1,552) (849,437) (17,871)

Net loss attributable to the Company

              (88,488) (88,488)

Stock-based compensation

  146,174  2  4,051          4,053 

Stock dividend

  34,232    156        (156)  

Public offerings, common stock, net

  36,502,440  365  153,584          153,949 

Stock option exercises

  634,519  6  401    125,819  (770)   (363)

Exercise of warrants

  23,918,429  239  101,886    86,391  (340)   101,785 

Shares issued for acquisition

  530,504  5  3,995          4,000 

Conversion of preferred stock

  5,521,676  55  1,163          1,218 

December 31, 2014

  173,644,532  1,736  1,096,392  898  378,116  (2,662) (938,081) 158,283 

Net loss attributable to the Company

              (55,690) (55,690)

Other comprehensive loss

        (100)        (100)

Stock-based compensation

  89,490  1  7,816          7,817 

Stock dividend

  47,553  1  104        (105)  

Stock option exercises

  364,448  4  163    101,837  (247)   (80)

Exercise of warrants

  26,882    47          47 

Shares issued for acquisition

  6,394,539  64  14,395          14,459 

December 31, 2015

  180,567,444  1,806  1,118,917  798  479,953  (2,909) (993,876) 124,736 

See accompanying notes to consolidated financial statements.


Table of Contents


PLUG POWER INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

For the years ended December 31, 2015, 2014 and 2013

(In thousands)

 
 2015 2014 2013 

Cash Flows From Operating Activities:

          

Net loss attributable to the Company

 $(55,690)$(88,488)$(62,670)

Adjustments to reconcile net loss to net cash used in operating activities:

          

Depreciation of property, plant and equipment, and leased property under capital lease

  2,006  1,946  1,908 

Amortization of intangible assets

  981  2,391  2,271 

Stock-based compensation

  7,817  4,157  2,181 

Gain on sale of equity interest in joint venture

      (3,235)

Loss (gain) on acquisition activity, net

  116  (1,014)  

Loss on disposal of property, plant and equipment

    78  66 

Provision for loss contracts related to service

  10,050     

Change in fair value of common stock warrant liability

  (3,661) 52,260  37,102 

Changes in operating assets and liabilities that provide (use) cash, net of effects of acquisitions:

          

Accounts receivable

  (5,638) (9,350) (2,408)

Inventory

  (7,251) (9,168) (1,856)

Prepaid expenses and other assets

  (11,656) (7,219) 137 

Note receivable

  64  63  61 

Accounts payable, accrued expenses, product warranty reserve and other liabilities

  7,214  10,818  (2,140)

Deferred revenue

  8,374  2,746  1,702 

Net cash used in operating activities

  (47,274) (40,780) (26,881)

Cash Flows From Investing Activities:

          

Proceeds from sale of equity interest in joint venture

      3,235 

Purchases of property, plant and equipment

  (3,520) (1,413) (111)

Net cash acquired in purchase acquisitions

  1,496  414   

Proceeds from disposal of property, plant and equipment

    34  84 

Net cash (used in) provided by investing activities

  (2,024) (965) 3,208 

Cash Flows From Financing Activities:

          

Change in restricted cash

  (47,335)   (500)

Proceeds from exercise of warrants

  25  18,340  6,103 

Proceeds from issuance of preferred stock

      2,595 

Preferred stock issunce costs

      (224)

Purchase of treasury stock

  (247) (603)  

Proceeds from issuance of common stock and warrants

    176,700  14,808 

Common stock issuance costs

    (10,977) (1,934)

Repayment of borrowings under line of credit

      (3,381)

Proceeds from exercise of stock options

  167  240   

Principal payments on obligations under capital lease

  (587) (777) (699)

Proceeds from lease agreements recognized as finance obligations

  15,054    2,600 

Net cash (used in) provided by financing activities

  (32,923) 182,923  19,368 

Effect of exchange rate changes on cash

  (23)   (48)

(Decrease) increase in cash and cash equivalents

  (82,244) 141,178  (4,353)

Cash and cash equivalents, beginning of period

  146,205  5,027  9,380 

Cash and cash equivalents, end of period

 $63,961 $146,205 $5,027 

Other Supplemental Cash Flow Information:

          

Cash paid for interest

 $553 $433 $475 

Noncash investing activity—issuance of common stock for acquisitions

 $14,459 $4,000 $ 

See accompanying notes to consolidated financial statements


Table of Contents


Notes to Consolidated Financial Statements

1. Nature of Operations

    Description of Business

        Plug Power Inc., or the Company, is a leading provider of alternative energy technology focused on the design, development, commercialization and manufacture of hydrogen fuel cell systems used primarily for the material handling and stationary power market.

        We are focused on proton exchange membrane, or PEM, fuel cell and fuel processing technologies, fuel cell/battery hybrid technologies, and associated hydrogen storage and dispensing infrastructure from which multiple products are available. A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity and heat without combustion. Hydrogen is derived from hydrocarbon fuels such as liquid petroleum gas, or LPG, natural gas, propane, methanol, ethanol, gasoline or biofuels. Plug Power develops complete hydrogen delivery, storage and refueling solutions for customer locations. Hydrogen can also be obtained from the electrolysis of water, or produced on-site at consumer locations through a process known as reformation. Currently the Company obtains hydrogen by purchasing it from fuel suppliers.

        We provide and continue to develop fuel cell product solutions to replace lead-acid batteries in material handling vehicles and industrial trucks for some of the world's largest distribution and manufacturing businesses with a primary focus on North America. We are focusing our efforts on material handling applications (forklifts) at multi-shift high volume manufacturing and high throughput distribution sites where our products and services provide a unique combination of productivity, flexibility and environmental benefits. Our current product line includes: GenDrive, our hydrogen fueled PEM fuel cell system providing power to material handling vehicles; GenFuel, our hydrogen fueling delivery system; GenCare, our ongoing maintenance program for both the GenDrive fuel cells and GenFuel products; ReliOn, our stationary fuel cell solution providing scalable, modular PEM fuel cell power to support the backup and grid-support power requirements of the telecommunications, transportation, and utility sectors; and GenKey, our turn-key solution coupling together GenDrive or ReliOn, GenFuel and GenCare, offering complete simplicity to customers transitioning to fuel cell power; and GenFund, a collaboration with leasing organizations to provide cost efficient and seamless financing solutions to customers.

        We provide our products worldwide, with a primary focus on North America, through our direct product sales force, leveraging relationships with original equipment manufacturers, or OEMs, and their dealer networks. Through July 31, 2015, we were a party to a joint venture based in France with Axane, S.A. (Axane), a subsidiary of Air Liquide, under the name HyPulsion, to develop and sell hydrogen fuel cell systems for the European material handling market. On July 31, 2015 we purchased all of Axane's equity interest in HyPulsion and now hold 100% of such interests. See note 4 regarding our acquisition of the remaining ownership of HyPulsion. Prior to the acquisition the Company had a zero basis in its equity investment.

        We were organized as a corporation in the State of Delaware on June 27, 1997.

        Unless the context indicates otherwise, the terms "Company," "Plug Power," "we," "our" or "us" as used herein refers to Plug Power Inc. and its subsidiaries.

    Liquidity

        Our cash requirements relate primarily to working capital needed to operate and grow our business, including funding operating expenses, growth in inventory to support both shipments of new units and servicing the installed base, funding the growth in our GenKey "turn-key" solution which also includes the installation of our customer's hydrogen infrastructure as well as delivery of the hydrogen fuel, and continued development and expansion of our products. Our ability to achieve profitability and


Table of Contents


Notes to Consolidated Financial Statements (Continued)

1. Nature of Operations (Continued)

meet future liquidity needs and capital requirements will depend upon numerous factors, including the timing and quantity of product orders and shipments; attaining positive gross margins; the timing and amount of our operating expenses; the timing and costs of working capital needs; the timing and costs of building a sales base; the ability of our customers to obtain financing to support commercial transactions; our ability to obtain financing arrangements to support the sale or leasing of our products and services to customers and the terms of such agreements which may require us to pledge or restrict substantial amounts of our cash to support these financing arrangements; the timing and costs of developing marketing and distribution channels; the timing and costs of product service requirements; the timing and costs of hiring and training product staff; the extent to which our products gain market acceptance; the timing and costs of product development and introductions; the extent of our ongoing and new research and development programs; and changes in our strategy or our planned activities. If we are unable to fund our operations with positive cash flows and cannot obtain external financing, we may not be able to sustain future operations. As a result, we may be required to delay, reduce and/or cease our operations and/or seek bankruptcy protection.

        We have experienced and continue to experience negative cash flows from operations and net losses. The Company incurred net losses attributable to common shareholders of $55.8 million, $88.6 million and $62.8 million for the years ended December 31, 2015, 2014, and 2013, respectively, and has an accumulated deficit of $993.9 million at December 31, 2015.

        During the year ended December 31, 2015, cash used in operating activities was $47.3 million, consisting primarily of a net loss attributable to the Company of $55.7 million, coupled with net outflows of operating assets and liabilities of $8.9 million. The investment in working capital primarily was related to inventory procured to meet our backlog requirements. On December 31, 2015, we had cash and cash equivalents of $64.0 million and net working capital of $88.5 million. By comparison, at December 31, 2014, cash and cash equivalents was $146.2 million and net working capital was $167.0 million.

        Net cash used by investing and financing activities for the year ended December 31, 2015 included purchases of equipment and payments on capital lease and finance obligations. In addition, during 2015, the Company signed sale/leaseback agreements with the Company's primary financial institution (M&T Bank or the Bank) to facilitate its commercial transactions with key customers. These agreements represent the sale of the Company's fuel cell systems, hydrogen infrastructure and agreements to provide related extended maintenance to the Bank. The Company then leases the fuel cell systems and hydrogen infrastructure back from the Bank and operates them at customer locations to fulfill Power Purchase Agreements (PPAs). These operating leases require, the Company to maintain cash balances in restricted accounts securing its lease obligations. Cash added to these restricted accounts was $14.2 million during 2015. Cash received from customers under the PPAs is used to make lease payments back to the Bank. As the Company performs under these agreements, the required restricted cash balances are released, according to a set schedule. At December 31, 2015, the Company has seven PPA's that are connected to these sale/leaseback agreements. Remaining lease payments to the Bank associated with these agreements are $26.1 million and have been secured with restricted cash. Also, cash associated with sales of future revenues is required to be recorded as financing obligation on the consolidated balance sheets and accordingly represents a financing cash inflow. With regards to the master lease agreement with the Bank, the Company has a financial covenant, which requires a minimum level of unrestricted cash of $50 million. The Bank currently has remaining contractual lease payments fully secured through a combination of restricted cash and pledges on funds escrowed for future service by the Company. The covenant is maintained in association with the residual exposure of the Bank, which stems from tax benefits taken by the Bank that could be


Table of Contents


Notes to Consolidated Financial Statements (Continued)

1. Nature of Operations (Continued)

recaptured should the underlying assets not be deployed for five years. This residual exposure at December 31, 2015 amounted to approximately $15 million, and the exposure decreases with the passage of each year. Should the Company's unrestricted cash fall below the aforementioned minimum level, the Company is entitled to remediate the requirement through the provision of additional restricted cash to the secure the outstanding residual tax exposure of the Bank at that time.

        Additional sale/leaseback agreements have been entered into with other financial institutions, however, they were structured differently in that they required prepaid rent or security deposits in addition to restricted cash. Prepaid rent and security deposits related to sale/leaseback transactions with these other financial institutions as of December 31, 2015 were $12.1 million and restricted cash was $32.6 million. Prepaid rent and security deposits are classified as operating outflows (and noncurrent assets on the consolidated balance sheets). Remaining lease payments associated with these agreements are $27.9 and have been secured with restricted cash, security deposits and prepaid rent.

        During 2014, we received gross proceeds of $176.7 million from three underwritten public offerings. Net proceeds after underwriting discounts and commissions and other estimated fees and expenses were $165.7 million. In addition, during 2014 we received $18.3 million from the exercise of previously issued common stock warrants.

        To date, we have funded our operations primarily through public and private offerings of common and preferred stock, a sale/leaseback of our building and our previous line of credit. The Company believes that its current cash, cash equivalents, cash anticipated to be generated from future operations and, to the extent exercised, cash generated from the exercise of outstanding warrants will provide sufficient liquidity to fund operations for at least the next twelve months. This projection is based on our current expectations regarding product sales and service, cost structure, cash burn rate and other operating assumptions. Also, see note 17 Subsequent Events regarding the closing of a loan facility with a specialty finance company on March 2, 2016.

2. Summary of Significant Accounting Policies

    Basis of Presentation

        The consolidated financial statements include the financial statements of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

        During 2015, the Company expanded its presentation of revenue and cost of revenue on the consolidated statements of operations. Management of the Company believes this revised presentation is more reflective of the current operations of the Company.

    Revenue Recognition

        The Company recognizes revenue under arrangements for products and services, which may include the sale of products and related services, including revenue from installation, service and maintenance, spare parts, hydrogen fueling services (which may include hydrogen supply as well as hydrogen fueling infrastructure) and leased units. The Company also recognizes revenue under research and development contracts, which are primarily cost reimbursement contracts associated with the development of PEM fuel cell technology.

    Products and Services

        The Company enters into revenue arrangements that may contain a combination of fuel cell systems and equipment, installation, service, maintenance, spare parts, and other support services.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

Revenue arrangements containing fuel cell systems and equipment may be sold, or leased to customers. For these multiple deliverable arrangements, the Company accounts for each separate deliverable as a separate unit of accounting if the delivered item or items have value to the customer on a standalone basis. The Company considers a deliverable to have standalone value if the item is sold separately by us or another entity or if the item could be resold by the customer. The Company allocates revenue to each separate deliverable based on its relative selling price. For a majority of our deliverables, the Company determines relative selling prices using its best estimate of the selling price since vendor-specific objective evidence and third-party evidence is generally not available for the deliverables involved in its revenue arrangements due to a lack of a competitive environment in selling fuel cell technology. When determining estimated selling prices, the Company considers the cost to produce the deliverable, a reasonable gross margin on that deliverable, the selling price and profit margin for similar products and services, the Company's ongoing pricing strategy and policies, the value of any enhancements that have been built into the deliverable and the characteristics of the varying markets in which the deliverable is sold, as applicable. The Company determines estimated selling prices for deliverables in its arrangements based on the specific facts and circumstances of each arrangement and analyzes the estimated selling prices used for its allocation of consideration of each arrangement.

        Once relative selling prices are determined, the Company proportionately allocates the sale consideration to each element of the arrangement. The allocated sales consideration related to fuel cell systems and equipment, spare parts, and hydrogen infrastructure is recognized as revenue at shipment if title and risk of loss have passed to the customer, there is persuasive evidence of an arrangement, the sales price is fixed or determinable, collection of the related receivable is reasonably assured, and customer acceptance criteria, if any, have been successfully demonstrated. The allocated sales consideration related to service and maintenance is generally recognized as revenue on a straight-line basis over the term of the contract, as appropriate.

        With respect to sales of consigned spare parts, the Company does not recognize revenue until the risks and rewards of ownership have transferred, the price is fixed, and the Company has a reasonable expectation of collection upon billing.

        For those customers who do not purchase an extended maintenance contract, the Company does not include a right of return on its products other than rights related to standard warranty provisions that permit repair or replacement of defective goods. The Company accrues for anticipated standard warranty costs at the same time that revenue is recognized for the related product. Only a limited number of fuel cell units are under standard warranty.

        In a vast majority of its commercial transactions, the Company sells extended maintenance contracts that generally provide for a five to ten year warranty from the date of product installation. These types of contracts are accounted for as a separate deliverable, and accordingly, revenue generated from these transactions is deferred and recognized in income over the warranty period, generally on a straight-line basis. Additionally, the Company may enter into annual service and extended maintenance contracts that are billed monthly. Revenue generated from these transactions is recognized in income on a straight-line basis over the term of the contract. Costs are recognized as incurred over the term of the contract. When costs are projected to exceed revenues on the life of the contract, an accrual for loss contracts is recorded. Costs are estimated based upon historical experience, contractual agreements and the Company's cost reduction plans. The actual results may differ from these estimates.

        The Company is a party to Power Purchase Agreements (PPAs) with certain key customers, such as Walmart. Revenue associated with these agreements are treated as rental income and recognized on


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

a straight-line basis over the life of the agreements. The Company also has rental expense associated with sale/leaseback agreements with financial institutions that were entered into commensurate with the PPAs. Rental expense is also recognized on a straight-line basis over the life of the agreements and is characterized as cost of PPA revenue on the accompanying consolidated statement of operations.

        The Company purchases hydrogen fuel from suppliers and sells to its customers upon delivery. Revenue and cost of revenue related to this fuel is recorded as dispensed and delivered, respectively, and are included in the respective "Fuel delivered to customers" lines on the consolidated statements of operations.

        At December 31, 2015 and December 31, 2014, the Company had unbilled amounts from product and service revenues of approximately $602 thousand and $616 thousand, respectively, which is included in other current assets in the accompanying consolidated balance sheets. At December 31, 2015 and December 31, 2014, the Company had deferred product and service revenues in the amount of $18.5 million and $10.1 million, respectively.

    Research and Development Contracts

        Contract accounting is used for research and development contract revenue. The Company generally shares in the cost of these programs with cost sharing percentages ranging from 30% to 50% of total project costs. Revenue from time and material contracts is recognized on the basis of hours expended plus other reimbursable contract costs incurred during the period and is included within the "other" revenue line on the consolidated statement of operations. All allowable work performed through the end of each calendar quarter is billed, subject to limitations in the respective contracts. We expect to continue research and development contract work that is directly related to our current product development efforts. At December 31, 2015 and 2014, the Company had unbilled amounts from research and development contract revenue in the amount of approximately $0.5 million and $1.0 million, respectively, which is included in other current assets in the accompanying consolidated balance sheets. Unbilled amounts at December 31, 2015 are expected to be billed during the first quarter of 2016. Contract revenue is recognized in other revenue on the Company's consolidated statements of operations.

    Sale/leaseback transactions

        The Company provides its products and services to certain customers in the form of a Power Purchase Agreement that generally expire in six years. For these specific transactions, the Company will complete a sale/leaseback for the related assets to a financial institution for similar terms. The Company accounts for sale/leaseback transactions as operating leases in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Subtopic 840-40,Leases—Sale/Leaseback Transactions. During 2015, the Company deferred profit related to sale/leaseback transactions of $3.6 million to be recognized on a straight-line basis over the life of related leases. This deferred profit is included within current and noncurrent deferred revenue on the Company's consolidated balance sheet at December 31, 2015.

    Cash Equivalents

        Cash equivalents consist of money market accounts with an initial term of less than three months. For purposes of the consolidated statements of cash flows, the Company considers all highly-liquid debt instruments with original maturities of three months or less to be cash equivalents. The Company's cash and cash equivalents are deposited with financial institutions located in the U.S. and may at times exceed insured limits.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

    Accounts Receivable

        Accounts receivable are stated at the amount billed to customers and are ordinarily due between 30 and 60 days after the issuance of the invoice. Receivables are reserved or written off based on individual credit evaluation and specific circumstances of the customer. The allowance for doubtful accounts and related receivable are reduced when the amount is deemed uncollectible. As of December 31, 2015 and December 31, 2014, the allowance for doubtful accounts was zero.

    Inventory

        Inventories are valued at the lower of cost, determined on a first-in, first-out basis, or market. All inventory, including inventory under consignment arrangements, is not relieved until the customer has accepted the product, at which time the risks and rewards of ownership have transferred.

    Property, Plant and Equipment

        Property, plant and equipment are originally recorded at cost or, if acquired as part of business combination, at fair value. Maintenance and repairs are expensed as costs are incurred. Depreciation on plant and equipment, which includes depreciation on the Company's facility that is accounted for as a financing obligation (see note 16, Commitments and Contingencies), is calculated on the straight-line method over the estimated useful lives of the assets. The Company records depreciation and amortization over the following estimated useful lives:

Buildings

20 years

Building improvements

5 - 20 years

Software, machinery and equipment

1 - 15 years

        Gains and losses resulting from the sale of property and equipment are recorded in current operations.

    Leased Property Under Capital Lease

        Leased property under capital lease is stated at the present value of minimum lease payments. Amortization expense is recorded on a straight-line basis over 6 years, the shorter of the lease term and the estimated useful life of the asset. Amortization expense amounted to $538 thousand and $517 thousand for the years ended December 31, 2015 and December 31, 2014, respectively, and has been included in cost of revenue for services performed on fuel cell systems and related infrastructure in the accompanying consolidated statements of operations.

    Impairment of Long-Lived Assets

        Long-lived assets, such as property, plant, and equipment, and purchased intangibles subject to amortization, are reviewed for potential impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated undiscounted future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. Fair value is determined through various valuation techniques, including discounted cash flow models, quoted market values and third party independent appraisals, as considered necessary. Assets to be disposed of and considered held for sale would be separately presented in the consolidated balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and are no longer


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

depreciated. The assets and liabilities of a disposal group classified as held for sale would be presented separately in the appropriate asset and liability sections of the consolidated balance sheet.

    Goodwill

        Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Goodwill is reviewed for impairment at least annually.

        The Company has the option to perform a qualitative assessment to determine whether it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount prior to performing the two-step goodwill impairment test. If this is the case, the two-step goodwill impairment test is required. If it is more-likely-than-not that the fair value of a reporting unit is greater than its carrying amount, the two-step goodwill impairment test is not required.

        The Company performs its annual impairment review of goodwill at December 1, and when a triggering event is determined to have occurred between annual impairment tests. For the year ended December 31, 2015, the Company performed a qualitative assessment of goodwill for its single reporting unit, and determined that it is not more likely than not that the fair value of its reporting unit is less than the carrying amount. Accordingly, no impairment loss was recorded in 2015.

    Intangible Assets

        Intangible assets with estimable useful lives are amortized over their respective estimated useful lives to their estimated residual values, and reviewed for impairment when certain triggering events occur. Intangible assets consist of acquired technology, customer relationships and trademarks, and are amortized using a straight-line method over their useful lives of 5-10 years.

    Product Warranty Reserve

        Aside from when included in the sale of an extended maintenance contract, the Company provides a one to two year standard product warranty to customers from date of installation of GenDrive units, and the ReliOn contracts we generally provide a two year standard product warranty. We currently estimate the costs of satisfying warranty claims based on an analysis of past experience and provide for future claims in the period the revenue is recognized. Factors that affect our warranty liability include the number of installed units, estimated material costs, estimated travel, and labor costs.

    Common Stock Warrant Accounting

        The Company accounts for common stock warrants in accordance with applicable accounting guidance provided in ASC Subtopic 815-40,Derivatives and Hedging—Contracts in Entity's Own Equity, as either derivative liabilities or as equity instruments depending on the specific terms of the warrant agreement. In compliance with applicable securities law, registered common stock warrants that require the issuance of registered shares upon exercise and do not sufficiently preclude an implied right to cash settlement are accounted for as derivative liabilities. We currently classify these derivative warrant liabilities on the accompanying consolidated balance sheets as a long-term liability, which is revalued at each balance sheet date subsequent to the initial issuance using the Black-Scholes pricing model. The Black-Scholes pricing model, which is based, in part, upon unobservable inputs for which there is little or no market data, requires the Company to develop its own assumptions. Changes in the fair value of the warrants are reflected in the accompanying consolidated statements of operations as change in fair value of common stock warrant liability.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

    Redeemable Preferred Stock

        We account for redeemable preferred stock as temporary equity in accordance with applicable accounting guidance in FASB ASC Topic 480, Distinguishing Liabilities from Equity. Dividends on the redeemable preferred stock are accounted for as a reduction (increase) in the net income (loss) attributable to common shareholders

    Income Taxes

        Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets if it is more likely than not that such assets will not be realized. We did not report a benefit for federal and state income taxes in the consolidated financial statements as the deferred tax asset generated from our net operating loss has been offset by a full valuation allowance because it is more likely than not that the tax benefits of the net operating loss carryforward will not be realized.

        The Company accounts for uncertain tax positions in accordance with FASB ASC No. 740-10-25,Income Taxes—Overall—Recognition. The Company recognizes in its consolidated financial statements the impact of a tax position only if that position is more likely than not to be sustained on audit, based on the technical merits of the position.

    Foreign Currency Translation

        Foreign currency translation adjustments arising from conversion of the Company's foreign subsidiary's financial statements to U.S. dollars for reporting purposes are included in accumulated other comprehensive income in stockholders' equity on the accompanying consolidated balance sheets. Transaction gains and losses resulting from the effect of exchange rate changes on transactions denominated in currencies other than the functional currency of the Company's operations give rise to realized foreign currency transaction gains and losses, and are included in interest and other income and interest and other expense, respectively, in the accompanying consolidated statements of operations.

    Research and Development

        Costs related to research and development activities by the Company are expensed as incurred.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

    Stock-Based Compensation

        The Company maintains employee stock-based compensation plans, which are described more fully in note 13, Employee Benefit Plans.

        Stock-based compensation represents the cost related to stock-based awards granted to employees and directors. The Company measures stock-based compensation cost at grant date, based on the fair value of the award, and recognizes the cost as expense on a straight-line basis (net of estimated forfeitures) over the option's requisite service period.

        The Company estimates the fair value of stock-based awards using a Black-Scholes valuation model. Stock-based compensation expense is recorded in cost of revenue associated with sales of fuel cell systems and related infrastructure, cost of revenue for services performed on fuel cell systems and related infrastructure, research and development expense and selling, general and administrative expenses in the accompanying consolidated statements of operations based on the employees' respective function.

        The Company records deferred tax assets for awards that result in deductions on the Company's income tax returns, based upon the amount of compensation cost recognized and the Company's statutory tax rate. Differences between the deferred tax assets recognized for financial reporting purposes and the actual tax deduction reported on the Company's income tax return are recorded in additional paid-in capital if the tax deduction exceeds the deferred tax asset or in the consolidated statements of operations if the deferred tax asset exceeds the tax deduction and no additional paid-in capital exists from previous awards. Excess tax benefits are recognized in the period in which the tax deduction is realized through a reduction of taxes payable. No tax benefit or expense for stock-based compensation has been recorded during the years ended December 31, 2015, 2014 and 2013 since the Company remains in a NOL position.

    Per Share Amounts

        Basic earnings per common share are computed by dividing net loss attributable to common shareholders by the weighted average number of common shares outstanding during the reporting period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock (such as stock options, unvested restricted stock, common stock warrants, and preferred stock) were exercised or converted into common stock or resulted in the issuance of common stock (net of any assumed repurchases) that then shared in the earnings of the Company, if any. This is computed by dividing net earnings by the combination of dilutive common share equivalents, which is comprised of shares issuable under outstanding warrants, the conversion of preferred stock, and the Company's share-based compensation plans, and the weighted average number of common shares outstanding during the reporting period. Since the Company is in a net loss position, all common stock equivalents would be considered to be anti-dilutive and are, therefore, not included in the determination of diluted earnings per share. Accordingly, basic and diluted loss per share are the same.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

        The following table provides the components of the calculations of basic and diluted earnings per share (in thousands, except share amounts):

 
 Years Ended December 31, 
 
 2015 2014 2013 

Numerator:

          

Net loss attributable to common shareholders

 $(55,795)$(88,644)$(62,791)

Denominator:

          

Weighted average number of common shares outstanding

  176,067,231  159,228,815  76,436,408 

        The dilutive potential common shares are summarized as follows:

 
 At December 31, 
 
 2015 2014 2013 

Stock options outstanding

  11,700,786  8,367,271  4,703,326 

Restricted stock outstanding

  204,444  473,336  650,002 

Common stock warrants(1)

  4,192,567  4,219,449  24,137,878 

Preferred stock(2)

  5,554,594  5,554,594  10,972,859 

Number of dilutive potential common shares

  21,652,391  18,614,650  40,464,065 

(1)
In May 2011, the Company issued 7,128,563 warrants as part of an underwritten public offering. As a result of additional public offerings, and pursuant to the effect of the anti-dilution provisions of these warrants, the number of warrants increased to 22,995,365. Of the warrants issued in May 2011, 22,802,898 have been exercised as of December 31, 2015. In February 2013, the Company issued 23,637,500 warrants as part of an underwritten public offering. Of the warrants issued in February 2013, 23,637,400 were exercised prior to December 31, 2015. In January 2014, the Company issued 4,000,000 warrants as part of an underwritten public offering. Of the warrants issued in January 2014, none have been exercised as of December 31, 2015. All warrants have anti-dilution provisions.

(2)
The preferred stock amount represents the dilutive potential common shares of the Series C redeemable convertible preferred stock issued on May 16, 2013 based on the conversion price of the preferred stock as of December 31, 2015. Of the 10,431 preferred shares issued in May 2013, 5,200 had been converted to common stock as of December 31, 2015.

    Use of Estimates

        The consolidated financial statements of the Company have been prepared in conformity with U.S. generally accepted accounting principles, which require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

        One significant estimate is the determination of whether loss contracts exist. The Company recorded a provision for loss contracts related to service, as discussed in note 10, Warranty Reserve and Accrual for Loss Contracts Related to Service.

    Reclassifications

        Reclassifications are made, whenever necessary, to prior period financial statements to conform to the current period presentation. These reclassifications did not impact the results of operations or net cash flows in the periods presented.

    Subsequent Events

        The Company evaluates subsequent events at the date of the balance sheet as well as conditions that arise after the balance sheet date but before the consolidated financial statements are issued. The effects of conditions that existed at the balance sheet date are recognized in the consolidated financial statements. Events and conditions arising after the balance sheet date but before the consolidated financial statements are issued are evaluated to determine if disclosure is required to keep the consolidated financial statements from being misleading. To the extent such events and conditions exist, if any, disclosures are made regarding the nature of events and the estimated financial effects for those events and conditions.

    Recent Accounting Pronouncements

        In February 2016, an accounting update was issued which requires balance sheet recognition for operating leases, among other changes to previous lease guidance. This accounting update is effective for fiscal years beginning after December 15, 2018. The Company is evaluating the impact this update will have the consolidated financial statements.

        In November 2015, an accounting update was issued that changes the classification of current and noncurrent deferred tax assets and liabilities. The new standard requires deferred tax assets and liabilities to be presented as noncurrent amounts. The Company early adopted the standard prospectively, beginning December 31, 2015. The adoption did not have a significant effect on the consolidated financial statements.

        In July 2015, an accounting update was issued that changes inventory measurement from lower of cost or market to lower of cost and net realizable value. The new standard applies to inventory measured at first-in, first-out (FIFO). This accounting update is effective for the reporting periods beginning after December 15, 2016, and interim periods within those years. The Company does not expect the adoption of this update to have a significant effect on the consolidated financial statements.

        In August 2014, an accounting update was issued relating to how management assesses conditions and events that could raise substantial doubt about an entity's ability to continue as a going concern. This accounting update is effective for reporting periods ending after December 15, 2016, and for annual and interim periods thereafter. The Company does not expect the adoption of this update to have a significant effect on the consolidated financial statements.

        In June 2014, an accounting update was issued that replaces the existing revenue recognition framework regarding contracts with customers. In July 2015, the FASB announced a one year delay in the required adoption date from January 1, 2017 to January 1, 2018. The Company is evaluating the


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Notes to Consolidated Financial Statements (Continued)

2. Summary of Significant Accounting Policies (Continued)

effect this update will have on the consolidated financial statements and has not yet selected a transition method.

3. Acquisition of ReliOn, Inc.

        On April 2, 2014, the Company completed the acquisition of ReliOn, Inc. ("ReliOn") for an aggregate purchase price of $4.0 million. The Company acquired substantially all of the assets of ReliOn, including patents, technology and other intangible assets, equipment and other tangible assets. ReliOn is a developer of hydrogen fuel cell stack technology based in Spokane, Washington. As consideration, the Company issued 530,504 shares of common stock, and assumed certain specified liabilities of ReliOn. The total purchase price is based on the issuance of 530,504 shares of Plug Power common stock at the closing price of the Company's stock on April 1, 2014 of $7.54. Upon closing of the acquisition, the Company reported a gain on bargain purchase of $1.0 million and it has been included within (loss) gain on acquisition activity, net on the consolidated statements of operations. Results of operations of ReliOn have been consolidated since acquisition.

4. Acquisition of HyPulsion

        On July 24, 2015, the Company entered into a Share Purchase Agreement with Axane, pursuant to which on July 31, 2015, the Company (through a wholly-owned subsidiary) acquired Axane's 80% equity interest in HyPulsion for $11.5 million, payable in shares of its common stock. In connection with the aforementioned agreement, the Company initially issued 4,781,250 shares of its common stock at closing. On August 26, 2015, the Company subsequently issued an additional 1,613,289 shares of common stock pursuant to a post-closing true-up provision, which was liability classified contingent consideration. The fair value of these additional shares of $3.0 million was recognized as expense and is included in the accompanying consolidated statement of operations for the year ended December 31, 2015, as a component of (loss) gain on acquisition activity, net.

        The following table summarizes the allocation of the purchase price to the estimated fair value of the net assets acquired, excluding goodwill (in thousands):

Cash and cash equivalents

 $1,496 

Accounts receivable

  917 

Inventory

  765 

Prepaid expenses and other assets

  746 

Leased property under capital lease

  159 

Identifiable intangibles

  4,159 

Accounts payable, accrued expenses, and other liabilities

  (2,430)

Total net assets acquired, excluding goodwill

 $5,812 

        Intangible assets recognized as part of purchase accounting represent acquired technology and will be amortized on a straight-line basis over ten years.


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Notes to Consolidated Financial Statements (Continued)

4. Acquisition of HyPulsion (Continued)

        Goodwill associated with the acquisition represents expanded access to the European markets related to the sale of fuel cell technology for material handling equipment and was calculated as follows (in thousands):

Consideration paid

 $11,474 

Add: fair value of prior interest

  2,869 

Less: net assets acquired

  (5,812)

Total goodwill recognized

 $8,531 

        As part of accounting for the acquisition, the Company recorded a gain to recognize the fair value of its 20% interest immediately prior to applying purchase accounting. The gain of $2.9 million is included in the accompanying consolidated statement of operations for the year ended December 31, 2015, as a component of (loss) gain on acquisition activity, net.

        Pro forma financial information with respect to the acquisition is not included as the impacts from the transaction are not material.

        Changes in goodwill between the acquisition date and December 31, 2015 are attributed to foreign currency translation.

5. Inventory

        Inventory as of December 31, 2015 and December 31, 2014 consists of the following (in thousands):

 
 December 31,
2015
 December 31,
2014
 

Raw materials and supplies

 $23,705 $18,502 

Work-in-process

  5,567  237 

Finished goods

  3,480  5,997 

 $32,752 $24,736 

        At December 31, 2015 and 2014, inventory on consignment was valued at approximately $2.2 million and $1.6 million, respectively.


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Notes to Consolidated Financial Statements (Continued)

6. Property, Plant and Equipment

        Property, plant and equipment at December 31, 2015 and 2014 consist of the following (in thousands):

 
 December 31,
2015
 December 31,
2014
 

Land

 $90 $90 

Buildings

  15,332  15,332 

Building improvements

  5,169  5,032 

Software, machinery and equipment

  14,634  11,397 

  35,225  31,851 

Less: accumulated depreciation

  (27,970) (26,539)

Property, plant, and equipment, net

 $7,255 $5,312 

        Depreciation expense related to property, plant and equipment was $1.5 million, $1.4 million, and $1.4 million for the years ended December 31, 2015, 2014 and 2013, respectively.

7. Capital Lease

        Leased property under capital lease at December 31, 2015 and December 31, 2014 consists of the following (in thousands):

 
 December 31,
2015
 December 31,
2014
 

Leased property under capital lease

 $3,367 $3,099 

Less: accumulated depreciation

  (1,700) (1,162)

Leased property under capital lease, net

 $1,667 $1,937 

8. Intangible Assets

        Intangible assets, consisting of acquired technology, customer relationships and trademarks, are amortized using the straight-line method over their useful lives of five to ten years.

        The gross carrying amount and accumulated amortization of the Company's acquired identifiable intangible assets as of December 31, 2015 are as follows (in thousands):

 
 Weighted Average
Amortization Period
 Gross Carrying
Amount
 Accumulated
Amortization
 Total 

Acquired technology

 9 years $4,793 $(403)$4,390 

Customer relationships

 10 years  260  (45) 215 

Trademark

 5 years  60  (21) 39 

   $5,113 $(469)$4,644 

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Notes to Consolidated Financial Statements (Continued)

8. Intangible Assets (Continued)

        The gross carrying amount and accumulated amortization of the Company's acquired identifiable intangible assets as of December 31, 2014 are as follows (in thousands):

 
 Weighted Average
Amortization Period
 Gross Carrying
Amount
 Accumulated
Amortization
 Total 

Acquired technology

 8 years $17,697 $(16,540)$1,157 

Customer relationships

 8 years  1,260  (978) 282 

Trademark

 5 years  60  (9) 51 

   $19,017 $(17,527)$1,490 

        The change in the gross carrying amount of the acquired technology from December 31, 2014 to December 31, 2015 is due to the acquisition of HyPulsion, and changes attributed to foreign currency translation, offset by removal of assets that became fully amortized.

        Amortization expense for acquired identifiable intangible assets for the years ended December 31, 2015, 2014, and 2013 was $1.0 million, $2.4 million, and $2.3 million, respectively. Estimated amortization expense for subsequent years is as follows (in thousands):

2016

  583 

2017

  583 

2018

  583 

2019

  475 

2020

  439 

Thereafter

  1,981 

Total

  4,644 

9. Accrued Expenses

        Accrued expenses at December 31, 2015 and 2014 consist of (in thousands):

 
 2015 2014 

Accrued payroll and compensation related costs

 $3,896 $2,518 

Accrued accounts payable

  2,444  3,500 

Accrued sales and other taxes

  1,490  706 

Accrued litigation

  1,077  1,143 

Accrued other

  945  883 

Total

 $9,852 $8,750 

Table of Contents


Notes to Consolidated Financial Statements (Continued)

10. Warranty Reserve and Accrual for Loss Contracts Related to Service

        The following table summarizes product warranty activity recorded during the years ended December 31, 2015 and 2014 (in thousands):

 
 December 31, 2015 December 31, 2014 

Beginning balance—January 1

 $1,311 $1,608 

Additions for ReliOn acquisition

    233 

Additions for current period deliveries

  230  961 

Reductions for payments made

  (1,135) (1,491)

Ending balance—December 31

 $406 $1,311 

        Also, management has projected estimated service costs related to extended maintenance contracts and determined that certain loss contracts exist. A variety of assumptions are included in the estimates of future service costs, including the life of parts, failure rates of parts, and future costs of parts and labor. As a result, the Company recorded an accrual for loss contracts related to service of $10.1 million, as of December 31, 2015 and a charge to the Company's consolidated statement of operations during 2015.

11. Stockholders' Equity

    Preferred Stock

        The Company has authorized 5.0 million shares of preferred stock, par value $0.01 per share. The Company's certificate of incorporation provides that shares of preferred stock may be issued from time to time in one or more series. The Company's Board of Directors is authorized to fix the voting rights, if any, designations, powers, preferences, qualifications, limitations and restrictions thereof, applicable to the shares of each series.

        The Company has authorized Series A Junior Participating Cumulative Preferred Stock, par value $.01 per share. As of December 31, 2015 and 2014, there were no shares of Series A Junior Participating Cumulative Preferred Stock issued and outstanding.

    Common Stock and Warrants

        The Company has one class of common stock, par value $0.01 per share. Each share of the Company's common stock is entitled to one vote on all matters submitted to stockholders. There were 180,087,491 and 173,266,416 shares of common stock outstanding as of December 31, 2015 and 2014, respectively.

        During 2014, the Company completed a series of underwritten public offerings, aggregating to issuances of 36,502,440 shares of common stock. The share prices ranged from $5.50 to $5.74 with respect to 26,502,440 of the shares. One of the underwritten public offerings included accompanying warrants to purchase 4,000,000 shares of common stock. The shares and the warrants were sold together in a fixed combination, with each combination consisting of one share of common stock and 0.40 of a warrant to purchase one share of common stock, at a price of $3.00 per fixed combination for 10,000,000 shares. The total net proceeds to the Company from the 2014 public offerings were $165.7 million, of which $11.8 million in value was ascribed to the warrants issued in the January 2014 public offering. The warrants have an exercise price of $4.00 per share, were immediately exercisable and will expire on January 15, 2019.


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Notes to Consolidated Financial Statements (Continued)

11. Stockholders' Equity (Continued)

        During 2013, the Company completed a series of underwritten public offerings, aggregating to issuances of 43,101,800 shares of common stock. The share price was $0.54 with respect to 21,390,000 of the shares. One of the underwritten public offerings included accompanying warrants to purchase 21,711,800 shares of common stock. The shares and the warrants were sold together in a fixed combination, with each combination consisting of one share of common stock and one warrant to purchase one share of common stock, at a prices ranging from $0.15 to $0.18 per fixed combination. The total net proceeds to the Company from the 2013 public offerings were $12.9 million, of which $2.5 million in value was ascribed to the warrants issued in the February 2013 public offering. The warrants have exercise prices ranging from $0.15 to $0.18 per share, are exercisable and will expire in February 2018.

        During the years ended December 31, 2015, 2014 and 2013, 26,882, 23,918,429 and 22,494,987 warrants were exercised, respectively, resulting in the issuance of shares of common stock of 26,882, 23,832,038 and 22,494,987, respectively, and gross proceeds of $25 thousand, $18.3 million and $6.1 million, respectively, and increase of paid-in capital and reduction of the warrant liability by $22 thousand, $83.4 million and $11.2 million, respectively. At December 31, 2015 and 2014, the Company has 4,192,567 and 4,219,449 warrants outstanding and exercisable. The warrants are measured at fair value and classified as a liability on the consolidated balance sheets.

12. Redeemable Preferred Stock

        On May 8, 2013, the Company entered into a Securities Purchase Agreement with Air Liquide, pursuant to which the Company agreed to issue and sell 10,431 shares of the Company's Series C Redeemable Convertible Preferred Stock, par value $0.01 per share, for an aggregate purchase price of approximately $2.6 million (Euro 2 million) in cash. On August 26, 2014, Air Liquide acquired 5,521,676 shares of Common Stock by converting 5,200 shares of Series C Preferred Stock at the conversion price of $0.2343. Following the conversion, Air Liquide continues to own 5,231 shares of Series C Preferred Stock. The holder of these shares is entitled to designate one director to the Company's Board of Directors. The Series C Preferred Stock ranks senior to the Common Stock with respect to rights upon the liquidation, dissolution or winding up of the Company. In the event of any voluntary or involuntary liquidation, dissolution or winding up of the Company, or other deemed liquidation event, as defined in the Securities Purchase Agreement, the holder of the Series C Preferred Stock will be entitled to be paid an amount per share equal to the greater of (i) the original issue price, plus any accrued but unpaid dividends or (ii) the amount per share that would have been payable had all shares of the Preferred Stock been converted to shares of common stock immediately prior to such liquidation event. The Series C Preferred Stock may not be redeemed by the Company until May 8, 2016. After this date, the Series C Preferred Stock is redeemable at the election of the holder of the Series C Preferred Stock or the Company.

        The holder of the Series C Preferred Stock is entitled to receive dividends at a rate of 8% per annum, based on the original issue price of $2,595,400, payable in equal quarterly installments in cash or in shares of Common Stock, at the Company's option. During the years ended December 31, 2015, 2014 and 2013 dividends have been paid in the form of shares of Common Stock. The Series C Preferred Stock is convertible into shares of Common Stock with the number of shares of Common Stock issuable upon conversion determined by dividing the original issue price of $2,595,400 by the conversion price in effect at the time the shares are converted. The conversion price of the Series C Preferred Stock as of December 31, 2015 and 2014 was $0.2343. The Series C Preferred Stock votes together with the Common Stock on an as-converted basis on all matters.


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Notes to Consolidated Financial Statements (Continued)

13. Employee Benefit Plans

2011 Stock Option and Incentive Plan

        On May 12, 2011, the Company's stockholders approved the 2011 Stock Option and Incentive Plan (the 2011 Plan). The 2011 Plan provides for the issuance of up to a maximum number of shares of common stock equal to the sum of (i) 1,000,000, plus (ii) the number of shares of common stock underlying any grants pursuant to the 2011 Plan or the Plug Power Inc. 1999 Stock Option and Incentive Plan that are forfeited, canceled, repurchased or are terminated (other than by exercise). The shares may be issued pursuant to stock options, stock appreciation rights, restricted stock awards and certain other equity-based awards granted to employees, directors and consultants of the Company. No grants may be made under the 2011 Plan after May 12, 2021. On May 16, 2012, the stockholders approved an amendment to the 2011 Plan, to increase the number of shares of the Company's common stock authorized for issuance under the 2011 Plan from 1.0 million to 6.5 million. On July 23, 2014, the stockholders approved an amendment to the 2011 Plan, to increase the number of shares of the Company's common stock authorized for issuance under the 2011 Plan from 6.5 million to 17.0 million. For the years ended December 31, 2015, 2014, and 2013, the Company recorded expense of approximately $7.5 million, $3.6 million, and $1.8 million, respectively, in connection with the 2011 Stock Option and Incentive Plan.

        At December 31, 2015, there were approximately 11.7 million options granted and outstanding and 4.3 million options available to be issued under the 2011 Plan, including adjustments for other types of share-based awards. Options for employees issued under this plan generally vest in equal annual installments over three years and expire ten years after issuance. Options granted to members of the Board generally vest one year after issuance. To date, options granted under the 2011 Plan have vesting provisions ranging from one to three years in duration and expire ten years after issuance.

        Compensation cost associated with employee stock options represented approximately $7.5 million, $3.4 million and $1.4 million of the total share-based payment expense recorded for the years ended December 31, 2015, 2014, and 2013, respectively. The Company estimates the fair value of stock options using a Black-Scholes valuation model, and the resulting fair value is recorded as compensation cost on a straight-line basis over the option vesting period. Key inputs and assumptions used to estimate the fair value of stock options include the grant price of the award, the expected option term, volatility of the Company's stock, an appropriate risk-free rate, and the Company's dividend yield. Estimates of fair value are not intended to predict actual future events or the value ultimately realized by employees who receive equity awards, and subsequent events are not indicative of the reasonableness of the original estimates of fair value made by the Company. The assumptions made for purposes of estimating fair value under the Black-Scholes model for the 3,960,000, 4,246,000, and 3,090,900 options granted during the years ended December 31, 2015, 2014 and 2013, respectively, were as follows:

 
 2015 2014 2013

Expected term of options (years)

 6 6 6

Risk free interest rate

 1.52% - 1.87% 1.77% - 1.94% 0.93% - 1.70%

Volatility

 104.03% - 105.29% 107.17% - 113.92% 92.46% - 107.01%

        There was no expected dividend yield for the employee stock options granted.

        The Company's estimate of an expected option term was calculated in accordance with the simplified method for calculating the expected term assumption. The estimated stock price volatility


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Notes to Consolidated Financial Statements (Continued)

13. Employee Benefit Plans (Continued)

was derived from the Company's actual historic stock prices over the past six years, which represents the Company's best estimate of expected volatility.

        A summary of stock option activity for the year December 31, 2015 is as follows (in thousands except share amounts):

 
 Shares Weighted
Average Exercise
Price
 Weighted Average
Remaining
Contractual Terms
 Aggregate
Instrinsic
Value
 

Options outstanding at December 31, 2014

  8,367,271 $3.94  8.7    

Granted

  3,960,000  2.46       

Exercised

  (173,334) 0.96       

Forfeited

  (406,975) 3.18       

Expired

  (46,176) 59.35       

Options outstanding at December 31, 2015

  11,700,786 $3.29  8.3 $3,397 
���

Options exercisable at December 31, 2015

  4,273,425  3.66  7.2  3,159 

Options unvested at December 31, 2015

  7,427,361 $3.08  9.0  815 

        The weighted average grant date fair value of options granted during the years ended December 31, 2015, 2014 and 2013 was $1.99, $4.05, and $0.32, respectively. As of December 31, 2015, there was approximately $14.9 million of unrecognized compensation cost related to stock option awards to be recognized over the next three years, all of this is expected to vest. The total fair value of stock options that vested during the years ended December 31, 2015 and 2014 was approximately $6.1 million and $3.4 million, respectively.

        Restricted stock awards generally vest in equal installments over a period of one to three years. Restricted stock awards are valued based on the closing price of the Company's common stock on the date of grant, and compensation cost is recorded on a straight-line basis over the share vesting period. The Company recorded expense associated with its restricted stock awards of approximately $118 thousand, $84 thousand, and $33 thousand for the years ended December 31, 2015, 2014 and 2013, respectively. Additionally, for the years ended December 31, 2015, 2014 and 2013, there was $132 thousand, $265 thousand, and $207 thousand, respectively, of unrecognized compensation cost related to restricted stock awards to be recognized over the next three years.

        A summary of restricted stock activity for the year ended December 31, 2015 is as follows (in thousands except share amounts):

 
 Shares Aggregate
Instrinsic
Value
 

Unvested restricted stock at December 31, 2014

  473,336    

Granted

      

Vested

  (191,114)   

Forfeited

  (77,778)   

Unvested restricted stock at December 31, 2015

  204,444 $431 

Table of Contents


Notes to Consolidated Financial Statements (Continued)

13. Employee Benefit Plans (Continued)

    401(k) Savings & Retirement Plan

        The Company offers a 401(k) Savings & Retirement Plan to eligible employees meeting certain age and service requirements. This plan permits participants to contribute 100% of their salary, up to the maximum allowable by the Internal Revenue Service regulations. Participants are immediately vested in their voluntary contributions plus actual earnings or less actual losses thereon. Participants are vested in the Company's matching contribution based on years of service completed. Participants are fully vested upon completion of three years of service. During 2002, the Company began funding its matching contribution in common stock. During 2015, the Company funded its matching contribution with cash. Accordingly, the Company has issued zero, 74,863, and 1,319,914 shares of common stock to the Plug Power Inc. 401(k) Savings & Retirement Plan during 2015, 2014 and 2013, respectively.

        The Company's expense for this plan, including the issuance of shares, was approximately $889 thousand, $367 thousand and $371 thousand for years ended December 31, 2015, 2014 and 2013, respectively.

    Non-Employee Director Compensation

        Each non-employee director is paid an annual retainer for their services, in the form of either cash or stock compensation. The Company granted 89,490, 71,311, and 673,152 shares of stock to non-employee directors as compensation for the years ended December 31, 2015, 2014, and 2013, respectively. All common stock issued is fully vested at the time of issuance and is valued at fair value on the date of issuance. The Company's share-based compensation expense for this plan was approximately $267 thousand, $331 thousand and $332 thousand for the years ended December 31, 2015, 2014, and 2013 respectively.

14. Fair Value Measurements

        The following table summarizes the financial instruments measured at fair value on a recurring basis in the consolidated balance sheets (in thousands):

 
 Total Quoted Prices
in Active
Markets for
Identical Items
(Level 1)
 Significant
Other
Observable
Inputs
(Level 2)
 Significant
Other
Unobservable
Inputs
(Level 3)
 

Balance at December 31, 2015

             

Common stock warrant liability

 $5,735 $ $ $5,735 

Balance at December 31, 2014

             

Common stock warrant liability

 $9,418 $ $ $9,418 

        The common stock warrant liability is measured at fair value using Level 3 inputs. Level 3 inputs are unobservable inputs and should be used to determine fair value only when observable inputs are not available. Unobservable inputs should be developed based on the best information available in the circumstances, which might include internally generated data and assumptions being used to price the asset or liability. When possible, the Company looks to active and observable markets to price identical assets, however when identical assets are not traded in active markets, the Company looks to market observable data for similar assets. Nevertheless, certain assets are not actively traded in observable


Table of Contents


Notes to Consolidated Financial Statements (Continued)

14. Fair Value Measurements (Continued)

markets and the Company must use alternative valuation techniques to derive a fair value measurement.

        For our common stock warrants, fair value is based on the Black-Scholes pricing model which is based, in part, upon unobservable inputs for which there is little or no market data, requiring the Company to develop its own assumptions. The Company used the following assumptions for its common stock warrants:


At
December 31, 2015
At
December 31, 2014

Risk-free interest rate

0.5% - 1.28%0.21% - 1.35%

Volatility

79.82% - 128.35%119.16% - 136.62%

Expected average term

0.42 - 3.041.42 - 4.04

        There was no expected dividend yield for the warrants granted. If factors change and different assumptions are used, the warrant liability and the change in estimated fair value could be materially different. Generally, as the market price of our common stock increases, the fair value of the warrant increases, and conversely, as the market price of our common stock decreases, the fair value of the warrant decreases. Also, a significant increase in the volatility of the market price of the Company's common stock, in isolation, would result in a significantly higher fair value measurement, and a significant decrease in volatility would result in a significantly lower fair value measurement.

        The following table shows reconciliations of the beginning and ending balances for financial instruments measured at fair value on a recurring basis using significant unobservable inputs (in thousands):

 
 Fair Value
Measurement
Using Significant
Unobservable Inputs
 
Common stock warrant liability
 2015 2014 

Beginning of period

 $9,418 $28,830 

Change in fair value of common stock warrants

  (3,661) 52,260 

Issuance of common stock warrants

    11,773 

Exercise of common stock warrants

  (22) (83,445)

End of period

 $5,735 $9,418 

15. Income Taxes

        The components of loss before income taxes and the provision for income taxes for the years ended December 31, 2015, 2014 and 2013, by jurisdiction, are as follows (in thousands):

 
 2015 2014 2013 
 
 U.S. Foreign Total U.S. Foreign Total U.S. Foreign Total 

Loss before income taxes

 $(54,921)$(769)$(55,690)$(87,459)$(1,354)$(88,813)$(61,730)$(1,350)$(63,080)

Income tax benefit

          325  325    410  410 

Net loss attributable to the Company

 $(54,921)$(769)$(55,690)$(87,459)$(1,029)$(88,488)$(61,730)$(940)$(62,670)

Table of Contents


Notes to Consolidated Financial Statements (Continued)

15. Income Taxes (Continued)

        The significant components deferred income tax (benefit) expense for the years ended December 31, 2015, 2014 and 2013, by jurisdiction, are as follows (in thousands):

 
 2015 2014 2013 
 
 U.S. Foreign Total U.S. Foreign Total U.S. Foreign Total 

Deferred tax (benefit) expense

 $(14,237)$893 $(13,344)$(4,282)$194 $(4,088)$(3,209)$1,406 $(1,803)

Net operating loss carryforward (generated) expired

  (8,345) 895  (7,450) (8,974) 625  (8,349) (6,536) (15) (6,551)

Valuation allowance increase (decrease)

  22,582  (1,788) 20,794  13,256  (819) 12,437  9,745  (1,391) 8,354 

Provision for income taxes

 $ $ $ $ $ $ $ $ $ 

        The Company's effective income tax rate differed from the federal statutory rate as follows:

 
 2015 2014 2013 

U.S. Federal statutory tax rate

  (35.0)% (35.0)% (35.0)%

Deferred state taxes, net of federal benefit

  (3.1)% (1.2)% (1.3)%

Common stock warrant liability

  (2.3)% 20.6% 20.6%

Other, net

  0.3% (0.2)% 0.6%

Change in valuation allowance

  40.1% 15.4% 14.5%

  0.0% (0.4)% (0.6)%

        Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of certain assets and liabilities for financial reporting and the amounts used for income tax purposes. Significant components of the Company's deferred tax assets and liabilities as of December 31, 2015 and 2014 are as follows (in thousands):

 
 U.S. Foreign 
 
 2015 2014 2015 2014 

Intangible assets

 $ $ $1,469 $1,269 

Deferred revenue

  7,017  4,492     

Other reserves and accruals

  6,411  1,492     

Tax credit carryforwards

  798    65  78 

Property, plant and equipment

  1,803  1,624  389  464 

Amortization of stock-based compensation

  13,145  10,623     

Capitalized research & development expenditures

  13,431  12,816  4,008  4,777 

Net operating loss carryforwards

  27,202  18,857  5,797  2,931 

Total deferred tax asset

  69,807  49,904  11,728  9,519 

Valuation allowance

  (62,584) (40,002) (11,520) (9,519)

Net deferred tax assets

 $7,223 $9,902 $208 $ 

Intangible assets

  (220) (335)    

Property, plant and equipment

      (208)  

Non-employee stock based compensation

  (1,556) (1,556)    

Section 382 recognized built in loss

  (5,447) (8,011)    

Net deferred tax liability

 $(7,223)$(9,902)$(208)$ 

Net

 $ $ $ $ 

Table of Contents


Notes to Consolidated Financial Statements (Continued)

15. Income Taxes (Continued)

        The Company has early adopted, on a prospective basis, the recent accounting update which classifies all deferred tax assets and liabilities, along with any related valuation allowance, as a net noncurrent asset or liability on the consolidated balance sheet. Due to the full valuation allowance at December 31, 2015, the net deferred tax asset is zero. At December 31, 2014, deferred taxes were included on the consolidated balance sheet within other noncurrent assets of $1.4 million and other current liabilities of $1.4 million.

        The Company has recorded a valuation allowance, as a result of uncertainties related to the realization of its net deferred tax asset, at December 31, 2015 and 2014 of approximately $74.1 million and $49.5 million, respectively. A reconciliation of the current year change in valuation allowance is as follows (in thousands):

 
 U.S. Foreign Total 

Increase (decrease) in valuation allowance for current year increase in net operating losses

 $8,345 $(895)$7,450 

Increase in valuation allowance for current year net increase in deferred tax assets other than net operating losses

  14,237  641  14,878 

Decrease in valuation allowance as a result of foreign currency fluctuation

    (1,534) (1,534)

Increase in valuation allowance due to acquisition of Hypulsion

    3,789  3,789 

Net increase in valuation allowance

 $22,582 $2,001 $24,583 

        The deferred tax assets have been offset by a full valuation allowance because it is more likely than not that the tax benefits of the net operating loss carryforwards and other deferred tax assets may not be realized. Included in the valuation allowance at December 31, 2015 and December 31, 2014 are $0.1 million of deferred tax assets resulting from the exercise of employee stock options, which upon subsequent realization of the tax benefits, will be allocated directly to paid-in capital.

        Before the imposition of IRC Section 382 limitations described below, at December 31, 2015, the Company has unused federal and state net operating loss carryforwards of approximately $786.0 million, of which $117.0 million was generated from the operations of acquired companies prior to the dates of acquisition and $669 million was generated by the Company subsequent to the acquisition dates and through December 31, 2015.

        Under Internal Revenue Code (IRC) Section 382, the use of loss carryforwards may be limited if a change in ownership of a company occurs. If it is determined that, due to transactions involving the Company's shares owned by its 5 percent or greater shareholders, a change of ownership has occurred under the provisions of IRC Section 382, the Company's federal and state net operating loss carryforwards could be subject to significant IRC Section 382 limitations.

        Based on studies of the changes in ownership of the Company, it has been determined that IRC Section 382 ownership changes have occurred which significantly reduces that amount of pre-change net operating losses that can be used in future years to $13.5 million. In addition, net operating losses of $58.1 million incurred after the most recent ownership change are not subject to IRC Section 382 and are available for use in future years. Accordingly, the Company's deferred tax assets include


Table of Contents


Notes to Consolidated Financial Statements (Continued)

15. Income Taxes (Continued)

$71.6 million of U.S. net operating loss carryforwards. The net operating loss carryforwards available at December 31, 2015, if unused will expire at various dates from 2017 through 2035.

        The ownership changes also resulted in net unrealized built in losses per IRS Notice 2003-65 which should result in recognized built in losses during the five year recognition period. These recognized built in losses will translate into unfavorable book to tax add backs in the Company's 2016 to 2018 U.S. corporate income tax returns of approximately $14.3 million that resulted in a gross deferred tax liability of $5.4 million at December 31, 2015. This gross deferred tax liability offsets existing gross deferred tax assets effectively reducing the valuation allowance. This has no impact on the Company's current financial position, results of operations, or cash flows because of the full valuation allowance.

        Approximately $0.8 million of research credit carryforwards generated after the most recent IRC Section 382 ownership change are included in the Company's deferred tax assets. Due to limitations under IRC Section 382, research credit carryforwards existing prior to the most recent IRC Section 382 ownership change will not be used and are not reflected in the Company's gross deferred tax asset at December 31, 2015.

        At December 31, 2015, the Company has unused Canadian net operating loss carryforwards of approximately $8.3 million. The net operating loss carryforwards if unused will expire at various dates from 2016 through 2032. At December 31, 2015, the Company has scientific research and experimental development (SR&ED) expenditures of $16.0 million available to offset future taxable income in Canada. These SR&ED expenditures have no expiration date. At December 31, 2015, the Company has Canadian ITC credit carryforwards of $0.4 million available to offset future income tax. These credit carryforwards if unused will expire at various dates from 2016 through 2027. Approximately $0.4 million of the foreign net operating loss carryforwards and $0.3 million of the Canadian ITC credit carryforwards represent unrecognized tax benefits and are therefore, not reflected in the Company's deferred tax assets as of December 31, 2015.

        At December 31, 2015, the Company has unused French net operating loss carryforwards of approximately $11.4 million. The net operating loss may carryforward indefinitely or until the Company changes its activity.

        As of December 31, 2015, the Company has no un-repatriated foreign earnings.

        A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):

 
 2015 2014 2013 

Unrecognized tax benefits balance at beginning of year

 $522 $1,033 $1,579 

Reductions for tax positions of prior years

    (465) (471)

Currency Translation

  (85) (46) (75)

Unrecognized tax benefits balance at end of year

 $437 $522 $1,033 

        The Company recognizes accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense. During the year ended December 31, 2015 the Company recognized no benefit as the statute of limitations does not expire for the tax year ended 2007 until February 2016. The Company had $0.4 million of interest and penalties accrued at December 31, 2015 and December 31, 2014. During the first quarter of 2016, the statute of limitations will expire on the remaining unrecognized tax benefits.


Table of Contents


Notes to Consolidated Financial Statements (Continued)

15. Income Taxes (Continued)

        The Company files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to examination by taxing authorities. Open tax years in the U.S. range from 2012 to 2015, and open tax years in foreign jurisdictions range from 2007 to 2015. However, upon examination in subsequent years, if net operating loss carryforwards and tax credit carryforwards are utilized, the U.S. and foreign jurisdictions can reduce net operating loss carryforwards and tax credit carryforwards utilized in the year being examined if they do not agree with the carryforward amount. As of December 31, 2015, the Company was not under audit in the U.S. or non-U.S. taxing jurisdictions.

16. Commitments and Contingencies

    Operating Leases

        As of December 31, 2015 and 2014, the Company has several non-cancelable operating leases (as lessor and as lessee), primarily associated with sale/leaseback transactions that are partially secured by restricted cash (see also note 1) as summarized below and expire over the next six years. Minimum rent payments under operating leases are recognized on a straight-line basis over the term of the lease. Leases where the Company is the lessor contain termination clauses with associated penalties, the amount of which cause the likelihood of cancellation to be remote.

        Future minimum lease payments under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) as of December 31, 2015 are (in thousands):

 
 As Lessor As Lessee 

2016

 $10,411 $11,773 

2017

  10,411  11,794 

2018

  10,411  11,577 

2019

  10,411  10,386 

2020

  9,255  9,249 

2021 and thereafter

  5,022  5,503 

Total future minimum lease payments

 $55,921 $60,282 

        Rental expense for all operating leases were $6.2 million, $1.5 million, and $769 thousand for years ended December 31, 2015, 2014, and 2013 respectively.

        At December 31, 2015 and 2014, prepaid rent and security deposits associated with sale/leaseback transactions were $12.1 million and zero, respectively.

    Finance Obligation

        During the year ended December 31, 2015, the Company received cash for future services to be performed associated with certain sale/leaseback transactions. This cash received representing amounts related to future services amounted to $15.1 million. The short-term portion of this amount of $2.6 million is included in other current liabilities, with the remaining balance included in finance obligations within the accompanying consolidated balance sheet at December 31, 2015. The amount is amortized using the effective interest method.

        In 2013, the Company completed a sale-leaseback transaction of its property in Latham, New York, for an aggregate sale price of $4.5 million. Although the property was sold and the Company has no


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Notes to Consolidated Financial Statements (Continued)

16. Commitments and Contingencies (Continued)

legal ownership of the facility, the Company was prohibited from recording the transaction as a sale because of continuing involvement with the property. Accordingly, the sale has been accounted for as a financing transaction, which requires the Company to continue reporting the building as an asset and to record a financing obligation for the sale price. Liabilities relating to this agreement of $2.4 million and $74 thousand, $2.4 million and $66 thousand have been recorded as finance obligation and current portion finance obligation (other current liabilities), respectively, in the accompanying consolidated balance sheets as of December 31, 2015 and 2014, respectively .

    Restricted Cash

        The Company has entered into sale/leaseback agreements associated with its products and services. In connection with these agreements, cash of $46.8 million is required to be restricted as security and will be released over the lease term. The Company has additional letters of credit backed by security deposits as disclosed in the Operating Leases section above.

        The Company also has letters of credit in the aggregate amount of $1.0 million associated with an agreement to provide hydrogen infrastructure and hydrogen to a customer at its distribution center and with a finance obligation from the sale/leaseback of its building. Cash collateralizing these letters of credit is considered restricted cash.

    Litigation

        Legal matters are defended and handled in the ordinary course of business. The Company has established accruals for matters for which management considers a loss to be probable and reasonably estimable. It is the opinion of management that facts known at the present time do not indicate that such litigation, after taking into account insurance coverage and the aforementioned accruals, will have a material adverse impact on our results of operations, financial position, or cash flows.

    Concentrations of credit risk

        Concentrations of credit risk with respect to receivables exist due to the limited number of select customers with whom the Company has initial commercial sales arrangements. To mitigate credit risk, the Company performs appropriate evaluation of a prospective customer's financial condition.

        At December 31, 2015, two customers comprise approximately 50.9% of the total accounts receivable balance, with each customer individually representing 38.5% and 12.4% of total accounts receivable, respectively. At December 31, 2014, four customers comprise approximately 69.9% of the total accounts receivable balance, with each customer individually representing 30.2%, 16.0%, 13.4% and 10.3% of total accounts receivable, respectively.

        For the year ended December 31, 2015, 56.7% of total consolidated revenues were associated primarily with Walmart. For the year ended December 31, 2014, 37.2% of total consolidated revenues were associated primarily with Walmart and Volkswagen, with each representing 24.1% and 13.1% of total consolidated revenues, respectively. For the year ended December 31, 2013, 33.2% of our total consolidated revenues were associated Mercedes-Benz, Procter & Gamble, and Lowe's representing 11.6%, 11.2%, and 10.4% of total consolidated revenues, respectively.


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Notes to Consolidated Financial Statements (Continued)

17. Subsequent Event

        On March 2, 2016, the Company, together with its subsidiaries Emerging Power Inc. and Emergent Power Inc. (Loan Parties), entered into a Loan Agreement with Generate Lending, LLC (Lender).

        The Loan Agreement, among other things, provides for a $30 million secured term loan facility (the Term Loan Facility). Advances under the Term Loan Facility bear interest at the rate of 12.0% per annum, subject to compliance with financial covenants and other conditions. The Loan Agreement includes covenants, limitations and events of default customary for similar facilities, including a minimum cash and cash equivalents covenant and a minimum working capital covenant. Upon the occurrence and continuance of an event of default, the amounts advanced under the Term Loan Facility bear interest at a default rate of 14.0% per annum. The term of the Loan Agreement is one year, ending March 2, 2017 (Maturity Date).

        Pursuant to the Loan Agreement, (i) $12.5 million of the Term Loan Facility is available immediately, (ii) availability of $12.5 million of the Term Loan Facility is subject to the Loan Parties satisfying certain conditions and (iii) availability of the remaining $5 million of the Term Loan Facility is subject to the Lender's discretion. The Company has borrowed $12.5 million under the Loan Agreement. Interest is payable on a monthly basis and the entire then outstanding principal balance of the Term Loan Facility, together will all accrued and unpaid interest, is due and payable on the Maturity Date. On and after October 1, 2016, as and when the Company receives net proceeds from certain restricted cash accounts securing the financing of customer Power Purchase Agreements, the Company is required to prepay the outstanding principal balance of the Term Loan Facility with such net proceeds.

        All obligations under the Loan Agreement are unconditionally guaranteed by the Company's subsidiaries, Emerging Power Inc. and Emergent Power Inc. The Term Loan Facility is secured by substantially all of each Loan Parties' assets, including all intellectual property, all securities in domestic subsidiaries and 65% of the securities in foreign subsidiaries, subject to certain exceptions and exclusions.

        The Loan Agreement has financial covenants that require the Company to maintain at all times minimum unencumbered cash and cash equivalents equal or greater than the then outstanding principal balance of the Term Loan Facility. The financial covenants also require the Company to maintain at all times, on a consolidated basis for the Loan Parties and their subsidiaries, an amount of current assets minus current liabilities (excluding amounts owing under the Term Loan Facility) equal to or greater than 200% of the then outstanding principal balance under the Term Loan Facility.

        The Loan Agreement contains customary affirmative covenants for transactions of this type and other affirmative covenants agreed to by the parties, including, among others, the provision of annual and quarterly financial statements and compliance certificates, maintenance of property, insurance, compliance with laws and environmental matters. The Loan Agreement also provides that each Loan Party will direct proceeds from certain project finance arrangements to a controlled account subject to a first lien security interest by the Lender. The Loan Agreement contains customary negative covenants, including, among others, restrictions on the incurrence of indebtedness, granting of liens, making acquisitions, making loans, dissolving, entering into leases (other than sale/leaseback transactions) and asset sales. The Loan Agreement also provides for a number of customary events of default, including, among others, payment, bankruptcy, covenant, representation and warranty, change of control, judgment and material adverse effect defaults.


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Notes to Consolidated Financial Statements (Continued)

18. Unaudited Quarterly Financial Data (in thousands, except per share data)

 
 Quarters ended 
 
 March 31,
2015
 June 30,
2015
 September 30,
2015
 December 31,
2015
 

Revenue:

             

Sales of fuel cell systems and related infrastructure

 $5,090 $18,663 $24,777 $29,472 

Services performed on fuel cell systems and related infrastructure

  2,645  2,883  3,555  4,929 

Power Purchase Agreements

  977  1,077  1,546  2,118 

Fuel delivered to customers

  659  1,128  1,544  1,744 

Other

  45  258  10  168 

Gross (loss) profit(1)

  (2,111) 1,562  76  (9,417)

Operating expenses

  10,650  11,427  12,332  14,703 

Operating loss

  (12,761) (9,865) (12,256) (24,120)

Net loss attributable to common shareholders

  (11,077) (9,253) (10,238) (25,227)

Loss per share:

             

Basic and Diluted

 $(0.06)$(0.05)$(0.06)$(0.14)

(1)
Gross loss in the fourth quarter of 2015 includes the impact of a $10.1 million provision for loss contract related to service recorded by the Company, as discussed in note 10, Warranty Reserve and Accrual for Loss Contracts Related to Service.


 
 Quarters ended 
 
 March 31,
2014
 June 30,
2014
 September 30,
2014
 December 31,
2014
 

Revenue:

             

Sales of fuel cell systems and related infrastructure

 $3,162 $13,601 $15,462 $16,081 

Services performed on fuel cell systems and related infrastructure

  1,567  2,729  2,755  2,858 

Power Purchase Agreements

  259  337  639  902 

Fuel delivered to customers

  241  326  654  738 

Other

  346  328  371  874 

Gross (loss) profit

  (2,306) 195  (1,093) (1,658)

Operating expenses

  5,072  6,837  9,603  11,558 

Operating loss

  (7,378) (6,642) (10,696) (13,216)

Net (loss) income attributable to common shareholders

  (75,909) 3,825  (9,377) (7,183)

(Loss) income per share:

             

Basic and Diluted

 $(0.57)$0.02 $(0.06)$(0.04)