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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the

Securities Exchange Act of 1934 (Amendment

(Amendment No.    )

Filed by the Registrant  ☒                             Filed by a Party other than the Registrant  ☐

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Filed by a Party other than the Registranto

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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

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Definitive Proxy Statement

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Definitive Additional Materials

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Soliciting Material under §240.14a-12
§240.14a-12

Plug Power Inc.

(Name of Registrant as Specified In Its Charter)

 

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

Plug Power Inc.

(Name of Registrant as Specified In Its Charter)


(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

ý

 

No fee required.

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Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
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 (3) 

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Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.



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Amount Previously Paid:

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Filing Party:

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Date Filed:


Letter From Our Chief Executive Officer

LOGO

LOGO

July 9, 2021

Dear Fellow Stockholder:

Plug Power is an established leader within the hydrogen economy, serving high growth markets like supply chain and logistics, on-road electric vehicles, and stationary power through the deployment of fuel cell systems as well as the building and operating of hydrogen infrastructure—from the production of hydrogen to the development of fueling stations and everything in between. Plug Power’s dynamic work in 2020 has laid the building blocks to position our company to become an industry leader in the $10 trillion hydrogen economy. This work includes:

1.  Establishing the foundation to be a major player in the green hydrogen economy by executing strategic acquisitions to accelerate vertical integration in green hydrogen production.

2.  Driving adoption in core, on-road and stationary power markets.

3.  Investing in capabilities to expand industry and geographic footprints through joint ventures and partnerships with industry leaders, including Renault and SK Group.

4.  Growing a strong balance sheet.

2020 marked a record year in gross billings with $331.8 million for the full year reflecting our company’s strong value proposition in the growing hydrogen industry. The market rewarded us for these achievements as our share price increased 973% in 2020, compared to a 16% return for the S&P 500 Index.

We continue to reaffirm our recently raised 2021 gross billings guidance of $475 million, up from $450 million. Plug Power remains focused on, and is continuing to execute against, our four top priorities:

1.  Accelerate expansion in green hydrogen generation business.

2.  Successfully launch joint ventures with Renault and SK Group providing a global footprint.

3.  Continue to expand via partnerships, joint ventures and acquisitions in the hydrogen ecosystem.

4.  Expand customer relationships across all businesses to achieve $750 million in gross billings in 2022.

I’d be remiss if I did not mention COVID-19, the largest global impactor to our company, employees and communities since early 2020. More than any prior year, 2020 showed the importance of how a company handles employee health and welfare given the dynamics of COVID-19. Amid the global changes brought upon by the virus, Plug Power was deemed an essential business due to our role within the global food supply chain in March 2020. Plug Power products move approximately 30% of the retail food and groceries through the United States, an increase from 25%, as a result of support provided during the COVID-19 crisis.

We are providing you this proxy statement to enable you to give us your input by voting. We hope that you will attend our 2021 Annual Meeting of Stockholders which is scheduled to be held on July 30, 2020. Details of the business to be conducted at the meeting are set forth in the accompanying proxy statement. In the event that you are unable to attend, we urge you to vote by mail, phone or Internet, as described in the accompanying proxy statement.

Thank you for your continued support of our company.

Regards,

LOGO

Andrew J. Marsh



PLUG POWER INC.

968 Albany Shaker Road

Latham, NYNew York 12110

April 5, 2019July 9, 2021

Dear Stockholder:

You are cordially invited to attend the 20192021 Annual Meeting of Stockholders (the "Annual Meeting"“Annual Meeting”) of Plug Power Inc., a Delaware corporation (the "Company"(“Plug Power”),. In light of the COVID-19 pandemic, the meeting is scheduled to be held on Thursday, May 9, 2019,via live audio webcast at www.virtualshareholdermeeting.com/PLUG2021, July 30, 2021, at 10:00 a.m., Eastern Time, atTime. There will not be a physical meeting location, and stockholders will not be able to attend the offices of Goodwin Procter LLP, 620 Eighth Avenue, New York, NY 10018.Annual Meeting in person. This means that you can attend the Annual Meeting online, vote your shares during the online meeting and submit questions online during the virtual meeting. You will need the 16-digit control number, which is located on your proxy card, to attend the Annual Meeting. Details regarding admission to the Annual Meeting and the business to be conducted are more fully described in the accompanying Proxy Statement.

The proxy statement,Proxy Statement, with the accompanying formal notice of the meeting, describes the matters expected to be acted upon at the Annual Meeting as well as information on how you can vote your shares and submit questions at the Annual Meeting. Only holders of record of Plug Power’s common stock at the close of business on June 16, 2021 will be entitled to notice of, and to vote at, the Annual Meeting and any adjournments or postponements thereof.

Your vote is important. Your proxy or voting instruction card includes specific information regarding the several ways to vote your shares. We encourage you to vote as soon as possible, even if you plan to attend the Annual Meeting.Meeting online. You may vote over the internet, by telephone or by mail. By submitting your proxy materials, you will save the Company the expense of further proxy solicitation. Please note that all votes cast by telephone or on the Internet must be cast prior to 11:59 p.m., Eastern Time, on July 29, 2021.

If you have any questions, please contact Mackenzie Partners, Inc., which is assisting with the solicitation, toll-free at (800) 322-2885 or at proxy@mackenziepartners.com.

        ThankWe hope that you for yourwill join us on July 30, 2021. Your investment and continued support of Plug Power.

Sincerely,

/s/ ANDREW MARSH


Andrew Marsh
President and Chief Executive Officer


IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR
THE STOCKHOLDER MEETING TO BE HELD ON MAY 9, 2019:
Power are very much appreciated.

Our official Notice of Annual Meeting of Stockholders and Proxy Statement are available at:
www.proxyvote.com



IMPORTANT VOTING INFORMATION

STOCKHOLDERS MAY REQUEST ELECTRONIC DELIVERY OF PROXY DOCUMENTS.
Sincerely,

 Plug Power Inc. has made materials for its 2019 annual meeting of stockholders (the "Annual Meeting") to be held on Thursday, May 9, 2019, at 10:00 a.m., Eastern Time, at the offices of Goodwin Procter LLP, 620 Eighth Avenue, New York, NY 10018, available to stockholders on the Internet via www.proxyvote.com or via sendmaterial@proxyvote.com. Upon request, printed versions or e-mail versions of these materials will be made available to stockholders through www.proxyvote.com, by telephoning 1-800-579-1639 or by emailing sendmaterial@proxyvote.com. Further instructions to stockholders can be found on the notice of the Annual Meeting.


INFORMATION REGARDING ADMISSION TO THE ANNUAL MEETING
LOGO

        In accordance with our security procedures, all stockholders attending the Annual Meeting must present valid picture identification upon entry.


Andrew J. Marsh

President and Chief Executive Officer


PLUG POWER INC.

968 Albany Shaker Road

Latham, NYNew York 12110

(518) 782-7700

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

To Be Held on Thursday, May 9, 2019July 30, 2021

NOTICE IS HEREBY GIVEN that the 20192021 Annual Meeting of Stockholders (the “Annual Meeting”) of Plug Power Inc., a Delaware corporation (the "Company"“Company”), will be held on Thursday, May 9, 2019,July 30, 2021, via the Internet at www.virtualshareholdermeeeting.com/PLUG2021, at 10:00 a.m. Eastern Time, at the offices of Goodwin Procter LLP, 620 Eighth Avenue, New York, NY 10018 (the "Annual Meeting") for the purpose of considering and voting upon:

in person.

The Board of Directors has fixed the close of business on March 22, 2019June 16, 2021 as the record date for determination of stockholders entitled to notice of, and to vote at, the Annual Meeting and any adjournments or postponements thereof. Only holders of record of the Company'sCompany’s common stock par value $0.01 per share, and Series C Redeemable Convertible Preferred Stock, par value $0.01 per share, at the close of business on such record date will be entitled to notice of, and to vote at, the Annual Meeting and any adjournments or postponements thereof.

        Any action may be taken on the foregoing mattersA list of stockholders entitled to vote at the Annual Meeting on the date specified above, or onwill be open to examination by any date or datesstockholders, for any purpose germane to which, by original or later postponement or adjournment, the Annual Meeting, mayduring ordinary business hours, for a period of at least ten days prior to the meeting at the principal executive offices of the Company at 968 Albany Shaker Road, Latham, New York 12110. The stockholder list will also be postponed or adjourned.available during the Annual Meeting.

YOUR VOTE AND PARTICIPATION IN THE COMPANY'SCOMPANY’S AFFAIRS ARE IMPORTANT.

Whether or not you expect to attend the Annual Meeting online, please vote your shares to ensure your representation and the presence of a quorum at the Annual Meeting. Your vote is important regardless of the number of shares you own.

If your shares are registered in your name, even if you plan to attendmay vote your shares on the Annual Meeting or any postponement or adjournment of the Annual Meeting in person, we request that you voteInternet by visiting www.proxyvote.com, by telephone overby calling 1-800-690-6903 and following the Internet,recorded instructions or complete, signby completing, signing, dating, and returning a proxy card. If you mail your proxy card or vote by telephone or the Internet and then decide to ensure thatvote your shares will be represented atonline during the Annual Meeting.Meeting, you may still do so. Your proxy is revocable in accordance with the procedures set forth in the proxy statement.

If your shares are held in the name of a broker, trust, bank or other nominee, and you receive notice of the Annual Meeting through your broker or through another intermediary, please vote or complete and return the materials in accordance with the instructions provided to you by such broker or other intermediary or contact your broker directly in orderintermediary.

Important Notice Regarding the Availability of Proxy Materials for the Stockholders Meeting to obtain a proxy issued to you by your nominee holder to attend thebe Held on July 30, 2021:

This Notice of Annual Meeting of Stockholders, the Proxy Statement and vote in person.the 2020 Annual Report on Form 10-K are available for viewing, printing and downloading at www.proxyvote.com.

By Order of the Board of Directors

LOGO

Gerard L. Conway, Jr.

Corporate Secretary

Latham, New York

July 9, 2021


TABLE OF CONTENTS

QUESTIONS AND ANSWERS ABOUT THE ANNUAL MEETING, THE PROXY MATERIALS, AND VOTING YOUR SHARES

  By Order of the Board of Directors1

PROPOSAL 1: ELECTION OF DIRECTORS

  8

INFORMATION ABOUT OUR DIRECTORS

9

COMMITTEES AND MEETINGS OF THE BOARD OF DIRECTORS

15

CORPORATE RESPONSIBILITY

24

INFORMATION ABOUT OUR EXECUTIVE OFFICERS

27

EXECUTIVE COMPENSATION

29

PROPOSAL 2: APPROVAL OF THE CHARTER AMENDMENT

52

PROPOSAL 3: APPROVAL OF THE COMPANY’S 2021 STOCK OPTION AND INCENTIVE PLAN

54

PROPOSAL 4: /s/ GERARD L. CONWAY, JR.
NON-BINDING,


Gerard L. Conway, Jr.
Corporate Secretary ADVISORY VOTE ON EXECUTIVE COMPENSATION

62

PROPOSAL 5: RATIFICATION OF APPOINTMENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTANTS

63

RELATED PARTY TRANSACTIONS, POLICIES AND PROCEDURES AND TRANSACTIONS WITH RELATED PERSONS

64

PRINCIPAL STOCKHOLDERS

65

DELINQUENT SECTION 16(a) REPORTS

67

SUBMISSION OF STOCKHOLDER PROPOSALS FOR 2022 ANNUAL MEETING

68

DELIVERY OF PROXY MATERIALS AND ANNUAL REPORT

69

Latham, NY
April 5, 2019



PLUG POWER INC.
968 Albany Shaker Road

Latham, NYNew York 12110

(518) 782-7700



PROXY STATEMENT



2021 ANNUAL MEETING OF STOCKHOLDERS

To Be Held on Thursday, May 9, 2019July 30, 2021

This Proxy Statement and the accompanying form of proxy are being furnished in connection with the solicitation of proxies by the Board of Directors of Plug Power Inc. ("(“we," "us," "our," "Plug Power"” “us,” “our,” “Plug Power” or the "Company"“Company”) for use at the 20192021 Annual Meeting of Stockholders of the Company (the “Annual Meeting”) to be held via the Internet at www.virtualshareholdermeeting.com/PLUG2021, on Thursday, May 9, 2019,July 30, 2021, at 10:00 a.m. Eastern Time, at the offices of Goodwin Procter LLP, 620 Eighth Avenue, New York, NY 10018, and any adjournments or postponements thereof (the "Annual Meeting").thereof. This Proxy Statement and the accompanying form of proxy are first being sent or givenmade available to our stockholders on or about April 5, 2019.July 9, 2021. This Proxy Statement contains important information for you to consider when deciding how to vote on the matters brought before the Annual Meeting. Please read it carefully.


QUESTIONS AND ANSWERS ABOUT THE ANNUAL MEETING,

    What is a proxy?THE PROXY MATERIALS, AND VOTING YOUR SHARES

        A proxy is another person that you legally designate to vote your shares. If you designate someone as your proxy in a written document, that document is also called a "proxy" or a "proxy card." If you are a street name holder, you must obtain a proxy from your broker or nominee in order to vote your shares in person at the Annual Meeting.

    What is a proxy statement?

        A proxy statement is a document that regulations of the U.S. Securities and Exchange Commission ("SEC") require that we give to you when we ask you to sign a proxy card to vote your shares at the Annual Meeting.

    What is in this proxy statement?

        This proxy statement describes the proposals on which we would like you, as a stockholder, to vote at the Annual Meeting. It gives you information on the proposals, as well as other information about us, so that you can make an informed decision whether or how to vote your shares.

    What is the purpose of the Annual Meeting?

The purpose of the Annual Meeting is for our stockholders to consider and vote upon the following matters:

    1.
    The election of three Class II Directors each to hold office until the Company's 2022 Annual Meeting of Stockholders and until such director's successor is duly elected and qualified or until such director's earlier resignation or removal;

    2.
    The approval of an Amendment and Restatement of the Company's Second Amended and Restated 2011 Stock Option and Incentive Plan as described in the accompanying proxy statement;

    3.
    The approval of the advisory resolution regarding the compensation of our named executive officers as described in this proxy statement;

    4.
    The ratification of KPMG LLP as our independent auditors for 2019; and

    5.

    1.

    The election of three (3) Class I Directors, each to hold office until the Company’s 2024 Annual Meeting of Stockholders and until such director’s successor is duly elected and qualified or until such director’s earlier resignation or removal;

    2.

    The approval of the Fifth Certificate of Amendment of the Amended and Restated Certificate of Incorporation of the Company to increase the number of authorized shares of common stock from 750,000,000 shares to 1,500,000,000 shares as described in the accompanying proxy statement;

    3.

    The approval of the Plug Power Inc. 2021 Stock Option and Incentive Plan as described in the accompanying proxy statement;

    4.

    The approval of the non-binding advisory resolution regarding the compensation of the Company’s named executive officers as described in the accompanying proxy statement;

    5.

    The ratification of KPMG LLP as the Company’s independent registered public accounting firm for 2021; and

    6.

    Such other business as may properly come before the Annual Meeting and any adjournments or postponements thereof.

    Why is the 2021 Annual Meeting a virtual, online meeting?

    In light of the COVID-19 pandemic, our Annual Meeting will be a virtual meeting of stockholders where stockholders will participate by accessing a website using the Internet. There will not be a physical meeting location. In light of the public health and safety concerns related to the COVID-19 outbreak, we believe that hosting a virtual meeting will facilitate stockholder attendance and participation at our Annual Meeting by enabling stockholders to safely participate from any location around the world. We have designed the virtual annual meeting to provide the same rights and opportunities to participate as stockholders have at an in-person meeting, including the right to vote and ask questions through the virtual meeting platform.


How can I attend the Annual Meeting?

We will be hosting our Annual Meeting via live webcast only. Any stockholder can attend the Annual Meeting and any adjournments or postponements thereof.

        With respect to eligible stockholders who share a single address, welive online at www.virtualshareholdermeeting.com/PLUG2021. The webcast will start at 10:00 a.m., Eastern Time, on July 30, 2021. Stockholders may send only one notice or proxy statement to that address unless we receive instructions to the contrary from any stockholder at that address. This practice, known as "householding", is designed to reduce our printing and postage costs. However, if a stockholder of record residing at such address wishes to receive a separate notice or proxy statement in the future, he or she may contact Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110, Attn: Investor Relations or call the Company at (518) 782-7700vote and ask for Investor Relations. Eligible stockholders of record receiving multiple copies of our notice or proxy statement can request householding by contacting us in the same manner. Stockholders who own shares through a bank, broker or other nominee can request householding by contacting the nominee.

        We hereby undertake to deliver promptly, upon written or oral request, a copy of the notice or proxy statement to a stockholder at a shared address to which a single copy of the document was delivered. Requests should be directed to Investor Relations at the address or phone number set forth above.

        You may receive more than one set of voting materials, including multiple copies of the notice forquestions while attending the Annual Meeting or this proxy statement and multiple proxy cards or voting instruction cards. For example, if you hold your shares in more than one brokerage account, you will receive a separate voting instruction card for each brokerage account in which you hold shares. Similarly, if you are a stockholder of record and hold shares in a brokerage account, you will receive a notice ofonline. In order to be able to attend the Annual Meeting, for shares heldyou will need the 16-digit control number, which is located on your proxy card. Instructions on how to participate in your name and a notice or voting instruction card for shares held in street name. Please follow the directions provided in the notice for the Annual Meeting and each additional notice or voting instruction card you receive to ensure that all your shares are voted.also posted online at www.proxyvote.com.

The record date to determine the stockholders entitled to notice of, and to vote at, the Annual Meeting is the close of business on March 22, 2019June 16, 2021 (the "Record Date"“Record Date”). The Record Date was established by the Board of Directors as required by Delaware law. On the Record Date, 243,904,166568,317,504 shares of the Company's common stock, par value $0.01 per share (the "Common Stock"), and 2,620 shares of the Company's Series C Redeemable Convertible Preferred Stock, par value $0.01 per share (the "Series C Preferred Stock"“Common Stock”), were issued and outstanding and entitled to vote at the Annual Meeting. As of the Record Date, the Series C Preferred Stock was convertible into 2,782,075 shares of Common Stock. As of the record date, there were approximately 1,346811 holders of record of the Common Stock and two holders of record of the Series C Preferred Stock. However, management believes that a significant number of shares of Common Stock are held by brokers, under a "nominee name"banks or other nominees and that the number of beneficial stockholders of thebeneficially holding our Common Stock in “street name” exceeds 92,000.703,000.

Only holders of record of the Common Stock and the Series C Preferred Stock at the close of business on the Record Date may vote at the Annual Meeting or any adjournment or postponement thereof.


    Can I access the Notice of Annual Meeting of Stockholders, this Proxy Statement and the 2021 Annual Report on 10-K on the Internet?

    Yes, these materials are available on our website and can be accessed at www.proxyvote.com. The information found on, or accessible through, our website is not incorporated into, and does not form a part of, this Proxy Statement or any other report or document we file with or furnish to the Securities and Exchange Commission (the “SEC”).

    How many votes do I have?

Each share of Common Stock outstanding on the Record Date is entitled to one vote on each matter to be voted upon. Each share of Series C Preferred Stock outstanding on the Record Date is entitled to a number of votes equal to the number of whole shares of Common Stock into which such share of Series C Preferred Stock is convertible (calculated by aggregating all shares of Series C Preferred Stock held by each record holder and rounding the number of shares of Common Stock issuable upon their conversion down to the nearest whole share) as of the Record Date on each matter to be voted upon. As of the Record Date, each share of Series C Preferred Stock was convertible into 1,061.861 shares of Common Stock.

    What is the required quorum for the Annual Meeting?

The presence, in person or by proxy, of the holders of a majority in voting power of the outstanding shares of Common Stock and Series C Preferred Stock, taken together as a single class, entitled to vote at the Annual Meeting is necessary to constitute a quorum for the transaction of business at the Annual Meeting. For purposes of determining whether a quorum exists, we countshares are counted as present any shares that are voted over the Internet, by telephone, by completing and submitting a proxy, or that are represented at the Annual Meeting as well as anyif a shareholder entitled to vote is present at the virtual meeting, or has submitted a properly signed proxy in writing, or by voting over the Internet or by telephone. We also count abstentions and broker non-votes.non-votes as present for purposes of determining a quorum. If a quorum is not present or represented at the Annual Meeting, the chairman of the meeting or the holders of a majority of the shares represented, and who would beshareholders entitled to vote at the Annual Meeting if a quorum werethereat, present in person or represented, may adjourn the Annual Meeting from time to time without notice or other than announcement at the meeting until a quorum is present or represented.

    What is the difference between a stockholder of record and a "street name"“street name” holder?

If your shares are registered directly in your name with Broadridge Corporate Issuer Solutions, Inc., our stock transfer agent, for our Common Stock, you are considered the stockholder of record with respect to those shares. The noticeNotice of the

Annual Meeting has been sent directly to you by us. If your shares are held in a stock brokerage accountthrough one or by a bankmore brokers, banks or other nominee, thenominees, such broker, bank or nominee is considered the record holder of those shares. You are considered the beneficial owner of these shares, and your shares are held in "street name"“street name”. A noticeYou will receive the Notice of the Annual Meeting, or this proxy statementProxy Statement and the voting instruction card have been forwarded tofrom the third party or parties through which you by your nominee.hold our shares. As the beneficial owner, you have the right to direct your nominee on how to vote your shares. You will receive instructions from your nominee explaining how you can vote your shares and whether they permit Internet or telephone voting. Follow the instructions from your nominee included with these proxy materials, or contact your nominee to request a proxy form. We encourage you to provide voting instructions to your nominee. This ensures that your shares will be voted at the Annual Meeting according to your instructions.

Under New York Stock Exchange ("NYSE"(“NYSE”) rules, if you hold shares through a bank, broker or other institution and you do not timely provide voting instructions to them before the Annual Meeting, that firm has the discretion to vote your shares only on proposals that are routine as determined by the NYSE. Such firm will not have the discretion to vote your shares on proposals that are non-routine as determined by the NYSE. Broker non-votes occur when shares represented at the Annual Meeting held by a broker are not voted on a matter because the broker has not received voting instructions from the beneficial owner or person entitled to vote such shares and either the broker does not have discretionary voting authority on the matter or the broker chooses not to vote on a matter for which it has discretionary voting authority.


    How will my shares be voted if I am a stockholder of record?

Your proxy will be voted according to your instructions. If you are a stockholder of record and do not vote via the Internet or telephone or by returning a signed proxy card, your shares will not be voted unless you attend the Annual Meeting online and vote your shares. If you vote via the Internet or telephone and do not specify contrary voting instructions, your shares will be voted in accordance with the recommendations of our Board of Directors. Similarly, if you sign and submit your proxy card with no instructions, your shares will be voted in accordance with the recommendations of our Board of Directors.

    How can I attend the Annual Meeting?

        You may attend the Annual Meeting if you are listed as a stockholder as of the Record Date and bring proof of your identity. If you hold your shares in "street name" through a broker or other nominee, you will need to provide proof of your identity and proof that you are the beneficial owner of the shares by bringing either a copy of a brokerage statement showing your share ownership as of the Record Date or, if you wish to vote your shares in person at the Annual Meeting, a nominee issued proxy.

    How do I vote my shares?

Your vote is very important to us. Whether or notIf you planare a stockholder of record, you can vote your shares in one of the methods explained below:

By Telephone—All record holders can vote by touchtone telephone (within the United States, U.S. territories and Canada, there is no charge for the call) using the 1-800-690-6903 telephone number on the proxy card, using the procedures and instructions described on the proxy card.

Via the Internet Prior to the Annual Meeting—All record holders can transmit their proxy via the Internet prior to the Annual Meeting by following the instructions provided in the proxy card. If you vote over the Internet prior to the Annual Meeting, you will need to have your voter control number printed on the proxy card to access the website. The website is available at www.proxyvote.com.

Via the Internet During the Annual Meeting—All record holders can vote your shares online while virtually attending the Annual Meeting by following the instructions described at www.virtualshareholdermeeting.com/PLUG2021. If you vote by proxy prior to the Annual Meeting and choose to attend the Annual Meeting online, there is no need to vote again during the Annual Meeting unless you wish to change your vote.

By Mail—All record holders can vote by mailing your proxy card as described in the proxy materials.

Stockholders that own stock in “street name” must demonstrate proof of beneficial ownership to virtually attend the Annual Meeting, please vote bymeeting and must obtain a legal proxy in accordance with the instructions on your proxy card or voting instruction card (from your broker or other intermediary). There are three convenient ways of submitting your vote:

    By Telephone or Internet—All record holders can vote by touchtone telephone from the United States using the toll free telephone number on the proxy card, or over the Internet, using the procedures and instructions described on the proxy card. "Street name" holders may vote by telephone or Internet if their bank, broker or other nominee makes those methods available, in which caseto vote at the meeting.

Your bank, broker or other nominee will enclose theprovide you with instructions with the proxy materials they send you. The telephone and Internet voting procedures are designedthat you must follow to authenticate stockholders' identities, to allow stockholders to vote their shares, and to confirm that their instructions have been recorded properly.

In Person—All record holders may vote in person at the Annual Meeting. "Street name" holders may vote in person at the Annual Meeting if their bank, broker or other nominee has furnished a legal proxy. If you are a "street name" holder and would like to vote your shares by proxy, you will need to ask your bank, broker or other nominee to furnish you with a nominee issued proxy. You will need to bring the nominee issued proxy with you to the Annual Meeting and hand it in with a signed ballot that will be provided to you at the Annual Meeting. You will not be able to vote your shares without a nominee issued proxy. Note that a broker letter that identifies you as a stockholder is not the same as a nominee issued proxy.

By Written Proxy—All record holders can vote by written proxy card. If you are a "street name" holder, you will receive a written proxy card and a voting instruction card from your bank, broker or other nominee.
voted.

The Board of Directors has appointed Andrew J. Marsh, President and Chief Executive Officer, and Gerard L. Conway, Jr., General Counsel, Corporate Secretary and Senior Vice President, to serve as the proxies for the Annual Meeting.

If you complete all of the proxy card except one or more of the voting instructions, then the designated proxies will vote your shares as to which you provide no voting instructions in the manner described under "What“What if I do not specify how I want my shares voted?" below. We do not anticipate that any other matters will come before the Annual Meeting, but if any other matters properly come


before the Annual Meeting, then the designated proxies will vote your shares in accordance with applicable law and their judgment.

If you hold your shares in "street“street name," and complete the voting instruction card provided by your broker, bank or other intermediarynominee except with respect to one or more of the voting instructions, then your broker may be able to vote your shares with respect to the proposal as to which you provide no voting instructions. See "What“What is a broker non-vote?" above.

Even if you currently plan to attend the Annual Meeting online, we recommend thaturge you to vote your shares by telephone or Internet or return your proxy card or voting instructions as described abovein advance of the Annual Meeting so that your votes will be counted if you later decide notshould become unable to attend the Annual Meeting or are unableyour shares will be voted as directed by you. Telephone and Internet voting for stockholders of record will be available up until 11:59 p.m. Eastern Time on July 29, 2021, and mailed proxy cards must be received by 11:59 p.m. Eastern time on July 29, 2021 in order to attend. Attendancebe counted at the Annual Meeting. If the Annual Meeting is adjourned or postponed, these deadlines may be extended. The voting deadlines and availability of telephone and Internet voting for beneficial owners of shares held in “street name” will not causedepend on the voting processes of the organization that holds your previously granted proxyshares. Therefore, we urge you to be revoked unlesscarefully review and follow the voting instruction card and any other materials that you change your proxy instructions as described under "Can I change my vote or revoke my proxy?" below.receive from that organization.

    What are my choices when voting?

With respect to the election of a director (Proposal 1),Proposal 1, votes may be cast in favor of or withheld from the nominee. With respect to each of Proposals 2, 3, 4 and 4,5, stockholders may vote for the proposal, against the proposal, or abstain from voting on the proposal.

    What are the Board of Directors'Directors’ recommendations on how I should vote my shares?

The Board of Directors unanimously recommends that you vote your shares as follows:

Proposal 1—1 – FOR the election of each of the three nominees of the Board of Directors as a Class III Director of the Company;Company, each to hold office until the Company’s 2024 Annual Meeting of Stockholders and until such director’s successor is duly elected and qualified or until such director’s earlier resignation or removal;

Proposal 2—2 – FORthe approval of the Fifth Certificate of Amendment and Restatement of the Company's Second Amended and Restated 2011Certificate of Incorporation of the Company;

Proposal 3 – FOR the approval of the Plug Power Inc. 2021 Stock Option and Incentive Plan;

Proposal 3—4 – FOR the approval of thenon-binding advisory resolution regarding the compensation of the Company'sCompany’s named executive officers; and

Proposal 4—5 – FOR the ratification of KPMG LLP as the Company'sCompany’s independent auditors for 2019.2021.

    What if I do not specify how I want my shares voted?

    If you are a record holder who returns a completed proxy card that does not specify how you want to vote your shares on one or more proposals, the designated proxies will vote your shares for each proposal as to which you provide no voting instructions, in the following manner:

    Proposal 1—1 – FOR the election of each of the three nominees of the Board of Directors as a Class III Director of the Company;Company, each to hold office until the Company’s 2024 Annual Meeting of Stockholders and until such director’s successor is duly elected and qualified or until such director’s earlier resignation or removal;

    Proposal 2—2 – FORthe approval of the Amendment and RestatementFifth Certificate of amendment of the Company's Second Amended and Restated 2011Certificate of Incorporation of the Company;

    Proposal 3 – FOR the approval of the Plug Power Inc. 2021 Stock Option and Incentive Plan;

    Proposal 3—4 – FOR the approval of thenon-binding advisory resolution regarding the compensation of the Company'sCompany’s named executive officers; and

    Proposal 4—5 – FOR the ratification of KPMG LLP as the Company'sCompany’s independent auditors for 2019.2021.

    If you are a street name“street name” holder and do not provide voting instructions on one or more proposals, your bank, broker or other nominee may be able to vote those shares. See "What“What is a broker non-vote?" above.


      Can I change my vote or revoke my proxy?

    Yes. If you are a record holder, you may revoke your proxy at any time before it is voted on any matter (without, however, affecting any vote taken prior to such revocation)at the Annual Meeting by any of the following means:

      Attending the Annual Meeting and voting in person. Your attendance at the Annual Meeting will not by itself revoke a proxy. You must vote your shares by ballot at the Annual Meeting to revoke your proxy;

      Voting againonline by telephone or over the Internet (only your latest telephone or Internetas descried in the “How do I vote submitted prior to the Annual Meeting will be counted);

      my shares” section above;

    If you complete and submit a new valid proxy bearing a later date;date and

    return it by mail or transmit it using the telephone or Internet voting procedures prior to the Annual Meeting described in the “How do I vote my shares” section above; and

    Giving written notice of revocation to the Company addressed to the Corporate Secretary, at the Company'sCompany’s address above, which notice must be received before noon,11:59 p.m., Eastern Time, on May 8, 2019.July 29, 2021.

    Virtually attending the Annual Meeting, without voting online during the Annual Meeting, will not revoke your prior Internet vote, telephone vote or proxy submitted by mail, as the case may be.

    If you are a street name“street name” holder, your bank, broker or other nominee should provide instructions explaining how you may change or revoke your voting instructions. Please contact your bank, broker, or other nominee and follow its directions to change your vote.

            With respect to the electionFor Proposal 1 (election of directors (Proposal 1)directors), the affirmative vote of a plurality of the votes cast is necessary to elect a nominee as a directorby the holders of the Company. Approval of each of Proposals 2, 3 and 4 requires the affirmative vote of a majority in voting power of the shares of Common Stock and Series C Preferred Stock, voting together as a single class, present in person or represented by proxy at the Annual Meeting and entitled to vote on such Proposal.the matter is required to elect a nominee as a director of the Company. For Proposal 2 (approval of the Fifth Certificate of Amendment of the Amended and Restated Certificate of Incorporation of the Company), the affirmative vote of the holders of a majority of the outstanding shares of the Common Stock is required for approval. For Proposal 3 (approval of the Plug Power Inc. 2021 Stock Option and Incentive Plan), Proposal 4 (approval of a non-binding, advisory resolution regarding the compensation of the Company’s named executive officers) and Proposal 5 (ratification of the independent auditors), the affirmative vote of a majority of shares of Common Stock present in person or represented by proxy at the Annual Meeting and entitled to vote is required.

    How are abstentions and broker non-votes treated?

    Abstentions are included in the determination of the number of shares present at the Annual Meeting for determining a quorum at the meeting. Abstentions will have no effect in determining the outcome of the election of directors (Proposal 1). For each of Proposals 2, 3 and 4, abstentions will be included in determining the number of shares present and entitled to vote on the Proposal, thus having the effect of a vote against the Proposal.

            Broker broker non-votes, if any, are included in the determination of the number of shares present at the virtual Annual Meeting for determining a quorum at the meeting. Broker For Proposal 1, abstentions and broker non-votes if any, are not counted will have no effect in determining the numberoutcome of shares presentthe election of directors. For Proposal 2, abstentions and entitled to votebroker non-votes will be treated as votes cast against such proposal. For Proposals 3, 4 and 5, abstentions will thereforebe treated as votes cast against such proposal, while broker non-votes will have no effect on the outcomevote for Proposals 1, 2, 3 and 4.such proposal.

    Our Board of Directors is asking for your proxy and we will pay all of the costs of asking for stockholder proxies. We will reimburse brokerage houses and other custodians, nominees and fiduciaries for their reasonable out-of-pocket expenses for forwarding solicitation material to the beneficial owners of Common Stock and collecting voting instructions. We may use our officers and employees to ask for proxies, as described below.proxies. These officers and employees will not receive additional compensation for their efforts but will be reimbursed for out-of-pocket expenses. In addition, we have retained MacKenzie Partners, Inc. to assist in the solicitation of proxies for a fee of $15,000 plus reimbursement of expenses. The fees of MacKenzie Partners, Inc. as well as the reimbursement of expenses of MacKenzie Partners, Inc. will be borne by us.


      Is this proxy statementProxy Statement the only way that proxies are being solicited?

    No. In addition to the solicitation of proxies by use of the mail, our officers and employees, as well as MacKenzie Partners, Inc., may solicit the return of proxies, either by mail, telephone, fax, e-mail or through personal contact. These officers and employees will not receive additional compensation for their efforts but will be reimbursed for out-of-pocket expenses. The fees of MacKenzie Partners, Inc. as well as the reimbursement of expenses of MacKenzie Partners, Inc. will be borne by us. Brokerage houses and other custodians, nominees and fiduciaries, in connection with shares of the Common Stock registered in their names, will be requested to forward solicitation material to the beneficial owners of shares of Common Stock.

      Where can I find voting results?

    The Company expects to publish the voting results in a Current Report on Form 8-K, which it expects to file with the SEC within four business days following the Annual Meeting.

      What is “householding” and how does it affect me?

      With respect to eligible stockholders who share a single address, we may send only one notice or proxy statement to that address unless we receive instructions to the contrary from any stockholder at that address. This practice, known as “householding”, is designed to reduce our printing and postage costs. However, if a stockholder of record residing at such address wishes to receive a separate notice or proxy statement in the future, he or she may contact Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110, Attn: Investor Relations or call the Company at (518) 782-7700 and ask for Investor Relations. Eligible stockholders of record receiving multiple copies of our notice or proxy statement can request householding by contacting us in the same manner. Stockholders who own shares through a bank, broker or other nominee can request householding by contacting the nominee.

      We hereby undertake to deliver promptly, upon written or oral request, a copy of the notice or proxy statement to a stockholder at a shared address to which a single copy of the document was delivered. Requests should be directed to Investor Relations at the address or phone number set forth above.

      What should I do if I receive more than one set of voting materials?

      You may receive more than one set of voting materials, including multiple copies of the notice for the Annual Meeting or this Proxy Statement and multiple proxy cards or voting instruction cards. For example, if

    you hold your shares in more than one brokerage account, you will receive a separate voting instruction card for each brokerage account in which you hold shares. Similarly, if you are a stockholder of record and hold shares in a brokerage account, you will receive a Notice of the Annual Meeting for shares held in your name and a notice or voting instruction card for shares held in “street name.” Please follow the directions provided in the notice for the Annual Meeting and each additional notice or voting instruction card you receive to ensure that all your shares are voted.

    Who can help answer my questions?

    The information provided above in this "Question“Question and Answer"Answer” format is for your convenience only and is merely a summary of the information contained in this proxy statement.Proxy Statement. We urge you to carefully read this entire Proxy Statement, including the documents we refer to in this proxy statement. If you have any questions, or need additional material, pleaseProxy Statement. Please feel free to contact the firm assisting us in the solicitation of proxies, MacKenzie Partners, Inc., if you have any questions or need assistance in voting your shares. Banks and brokers may call MacKenzie Partners, Inc. at (212) 929-5500. Shareholders may contact MacKenzie Partners, Inc. toll-free at (800) 322-2885 or at PROXY@MACKENZIEPARTNERS.COM.



    PROPOSAL 1: ELECTION OF DIRECTORS

    Introduction

    At the Annual Meeting, three Class III Directors will be elected, each to serve until the Annual Meeting of Stockholders in 20222024 and until such director'sdirector’s successor is duly elected and qualified or until such director'sdirector’s earlier resignation or removal. The Board of Directors has nominated George C. McNamee, Johannes M. Roth,each of Andrew J. Marsh, Gary K. Willis, and Gregory L. KenausisMaureen O. Helmer for re-election as a Class II Directors.I Director. Shares represented by each properly executed proxy will be voted for the re-election of George C. McNamee, Johannes M. Roth,Andrew J. Marsh, Gary K. Willis, and Gregory L. KenausisMaureen O. Helmer as directors, unless contrary instructions are set forth on such proxy. Each nominee has agreed to stand for re-election and to serve, if elected, as a director. However, if any nominee fails to stand for re-election or is unable to accept election, the proxies will be voted for the election of such other person as the Board of Directors may recommend.

    Vote Required for Approval

    A quorum being present, the affirmative vote of a plurality of the votes cast by the holders of the shares present or represented by proxy is necessaryrequired to elect a nominee as a director of the Company. You may vote "FOR"“FOR” all nominees, "WITHHOLD"“WITHHOLD” for all nominees, or "WITHHOLD"“WITHHOLD” for any nominee(s) by specifying the name of the nominee(s) on your proxy card. Votes that are withheld will be excluded entirely from the vote and will have no effect on the vote. Broker Abstentions and broker non-votes will also have no effect on the outcome of the election of directors.


    Recommendation of the Board

    THE BOARD OF DIRECTORS OF THE COMPANY UNANIMOUSLY RECOMMENDS A VOTEFOR THE ELECTION OF EACH OF THE NOMINEES OF THE BOARD OF DIRECTORS AS A CLASS III DIRECTOR OF THE COMPANY.


    INFORMATION ABOUT OUR DIRECTORS

    The number of directors of the Company is presently fixed at nine (9)ten (10), and the Board of Directors currently consists of nine (9)ten (10) members. The Board of Directors is divided into three classes, with three (3) directors in Class I, three (3) directors in Class II, and three (3)four (4) 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'sCompany’s stockholders at each Annual Meeting of Stockholders.

    The Board of Directors has nominated George C. McNamee, Johannes M. Roth,Andrew J. Marsh, Gary K. Willis, and Gregory L. KenausisMaureen O. Helmer for re-election as Class III Directors.

            The Board of Directors has determined that Ms. Helmer and Messrs. McNamee, Willis, Silver, Roth, Kenausis, Schneider and Graves 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 are currently each filled by a different individual, Andrew Marsh and George C. McNamee, respectively. If the position of Chairman of the Board 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 including the three Class II Directors who have been nominated for re-election at the Annual Meeting. The ages of and biographical information regarding the nominees for re-election and each director who is not standing


    for election is based on information furnished to the Company by each nominee and director and is as of March 22, 2018.

    Name
     Age Director
    Since
     

    Class I—Term Expires 2021

           

    Andrew Marsh

      63  2008 

    Gary K. Willis(1)(2)

      72  2003 

    Maureen O. Helmer(1)(3)

      62  2004 

    Class II—Term Expires 2019

           

    George C. McNamee(2)*

      72  1997 

    Johannes M. Roth(2)(3)*

      40  2013 

    Gregory L. Kenausis(1)*

      50  2013 

    Class III—Term Expires 2020

           

    Lucas P. Schneider(3)

      50  2017 

    Gregory B. Graves(1)

      58  2017 

    Jonathan Silver(3)

      61  2018 

    *
    Nominee for re-election.

    (1)
    Member of the Audit Committee.

    (2)
    Member of the Compensation Committee.

    (3)
    Member of the Corporate Governance and Nominating Committee.

            The principal occupation and business experience for at least the last five years for each director of the Company is set forth below.June 30, 2021. The biographies of each of the directors below contains information regarding the person'sperson’s service as a director, business experience, director positions held currently or at any time during the last five years, and information regarding the experiences, qualifications, attributes or skills that caused the Corporate Governance and Nominating Committee and the Board to determine that the person should serve as a director.

    Andrew J. MarshClass I Directors

    Andrew J. Marsh

    Age: 65

    Director since

    2008

    Board Committee: None

    Andrew J. Marsh joined the Company as President and Chief Executive Officer in April 2008 and has been our director since 2008. As President and Chief Executive Officer, Mr. Marsh plans and directs all aspects of the organization’s policies and objectives, and is focused on building a company that leverages Plug Power’s combination of technological expertise, talented people and focus on sales growth to continue the Company’s leadership stance in the future alternative energy economy. Mr. Marsh continues to spearhead hydrogen fuel cell innovations, and his ability to drive revenue growth landed Plug Power on Deloitte’s Technology Fast 500TM list in 2015 and 2016.

    Class I Director:

    Continuing in

    office until the

    2021 Annual

    Meeting

    Previously, Mr. Marsh was a co-founder of Valere Power, where he served as chief executive officer 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 revenue 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 prominent voice leading the hydrogen and fuel cell industry. Nationally, he is the Chairman of the Fuel Cell and Hydrogen Energy Association, and is a member of the Hydrogen and Fuel Cell Tactical Advisory Committee (“HTAC”). HTAC has the important responsibility to provide advice to the Department of Energy regarding its hydrogen and fuel cell program goals, strategies, and activities. Internationally, Mr. Marsh represents Plug Power in their role as supporting members of the Hydrogen Council, a global initiative of leading energy, transport and industry companies with a united vision and long-term ambition for hydrogen to foster the energy transition. Mr. Marsh holds an MSEE from Duke University and an MBA from SMU.

    We believe Mr. Marsh’s qualifications to sit on our Board include his extensive experience with the alternative energy industry, as well as his experience in management positions.

    Gary K. Willis

    Age: 75

    Director since

    2003

    Board

    Committees:

    Audit and Compensation

    Class I Director:

    Continuing in

    office until the

    2021 Annual Meeting

    Gary K. Willis has been a director of the Company since 2003. Mr. Willis previously served as the President of the Zygo Corporation (“Zygo”) from February 1992 to 1999 and the Chief Executive Officer from 1993 to 1999. Mr. Willis served as a director of Zygo from 1992 to November 2000, including as Chairman of the Board from 1998 to 2000. Zygo, 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. Prior to joining Zygo, Mr. Willis served as the President and Chief Executive Officer of The Foxboro Company, a manufacturer of process control instruments and systems. Mr. Willis holds a Bachelor of Science degree in Mechanical Engineering from Worcester Polytechnic Institute.

    We believe Mr. Willis’ qualifications to sit on our Board include his extensive experience in management and director positions with similar companies, as well as his educational background in mechanical engineering.

    Maureen O. Helmer

    Age: 64

    Director since

    2004

    Board

    Committees:

    Audit and

    Corporate Governance and Nominating

    Class I Director:

    Continuing in

    office until the

    2021 Annual Meeting

    Maureen O. Helmer has been a director of the Company since 2004. Ms. Helmer is currently a member of the law firm Barclay Damon, LLP and is a senior member of the firm’s energy and telecommunications Regulatory Practice Area. Prior to 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 policy and government affairs issues. In addition to serving 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 Electric Generation Siting and the Environment. Prior to her appointment as Chair, Ms. Helmer served as Commissioner of the PSC from 1997 until 1998 and was General Counsel to PSC from 1995 through 1997. From 1984 through 1995, Ms. Helmer held several positions in the New York Legislature, including Counsel to the Senate Energy Committee. She also served as a board member of the New York State Energy Research and Development Authority, the New York State Environmental Board and the New York State Disaster Preparedness Commission during her tenure as Chair of the PSC. In addition, she was Vice Chair of the Electricity Committee of the National Association of Regulatory Utility Commissioners and a member of the NARUC Board of Directors. She was also appointed to serve as a member of the New 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 New York 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 practice law in New York.

    We believe Ms. Helmer’s qualifications to sit on our Board include her long history of experience with energy regulation, policy and government affairs and advising energy and industrial companies.

    Class II Directors

    George C. McNamee

    Chairman

    Age: 74

    Director

    since 1997

    Board Committee: Compensation

    Class II Director: Continuing in

    office until the

    2022 Annual Meeting

    George C. McNamee serves as Chairman of the Company’s Board of Directors and has served as such since 1997. He was previously Chairman of First Albany Companies Inc. (now GLCH) and a Managing Partner of FA Tech Ventures, an information and energy technology venture capital firm. As an executive and director of numerous companies, Mr. McNamee has navigated technological change, rapid- growth, crisis management, team building and strategy. As a public company director, 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 several public company boards, including the boards of Mechanical Technology Inc. and the Home Shopping Network. 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 last 11 of those years. In 2011, Mr. McNamee was the first history major awarded the Yale Science and Engineering Association Distinguished Service Award. He served as a NYSE director from 1999 to 2004 and chaired its foundation. In the aftermath of the 1987 stock market crash, he chaired the Group of Thirty Committee to reform the Clearance 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 12 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 a book on the Chicago Conspiracy Trial. He received his Bachelor of Arts degree from Yale University.

    We believe Mr. McNamee’s qualifications to sit on our Board include his experience serving on technology company boards, his background in investment banking, which has given him broad exposure to many financing and merger and acquisition issues, and experience with the financial sector and its regulatory bodies.

    Johannes M. Roth

    Age: 42

    Director since

    2013

    Board

    Committees: Compensation and Corporate Governance and Nominating

    Class II Director: Continuing in

    office until the

    2022 Annual Meeting

    Johannes M. Roth has been a director of the Company since April 2013. Mr. Roth is the founder of and, from 2006 until January 2021, was the Managing Director and Chairman of FiveT Capital Holding AG, an investment holding company based in Switzerland with businesses specializing in asset management, risk management and alternative investments. In addition, from 2006 until January 2021, Mr. Roth was 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. Mr. Roth earned a master’s degree in Management and Economics from the University of Hohenheim.

    We believe Mr. Roth’s qualifications to sit on our Board include his background in financial investments, financial and risk management and equity capital markets as well as his experience in management positions.

    Gregory L. Kenausis

    Age: 52

    Director since

    2013

    Board Committee: Audit

    Gregory L. Kenausis has been a director of the Company since October 2013. Dr. Kenausis is the founding partner and since 2005 has been the Chief Investment Officer of Grand Haven Capital AG, an investment firm, where he is the head of research and trading activity and is responsible for managing the fund’s operations and structure. He also has worked extensively as a business consultant with a focus on business development and strategy, as well as valuation. Dr. Kenausis earned a bachelor’s degree from Yale University and a doctoral degree from the University of Texas at Austin.

    Class III Director: Continuing in

    office until the

    2022 Annual Meeting

    We believe Dr. Kenausis’ qualifications to sit on our Board include his background and senior level experience in financial investments, business development and strategy, management and equity capital markets.

    Class III Directors

    Kyungyeol Song

    Age: 48

    Director since

    2021

    Board Committee: None

    Class III Director: Continuing in

    office until the

    2023 Annual Meeting

    Kyungyeol Song has been a director of the Company since February 2021. Dr. Song is the Head of Quantum Growth TF at SK E&S Co., Ltd. Prior to his current position, Dr. Song served as the Senior Vice President in Energy Solution TF at SK E&S Co., Ltd. from February 2019 until August 2020. Dr. Song has also served as the Director of the McKinsey Energy Center from February 2007 until December 2018. Dr. Song received a Ph.D. in Control and Estimation Theory, Aeronautics and Astronautics from the Massachusetts Institute of Technology, a Master of Science in Aerospace Engineering from Seoul National University, and a Bachelor of Science degree in Aerospace Engineering from Seoul National University.

    We believe Dr. Song’s qualifications to sit on our Board include his extensive experience with the renewable energy industry.

    Kimberly A. Harriman

    Age: 48

    Director since

    2021

    Board Committee:

    Audit

    Class III Director:

    Continuing in

    office until the

    2023 Annual Meeting

    Kimberly A. Harriman has served as a director of the Company since February 2021. Since 2020, Ms. Harriman is the Vice President of State Government Relations & Public Affairs at Avangrid, Inc., a NYSE-listed energy provider operating in 24 states. Prior to joining Avangrid, from 2016 to December 2020, Ms. Harriman served as Senior Vice President, Public and Regulatory Affairs, for New York Power Authority, the largest public utility in the United States. Previously Ms. Harriman was General Counsel for the New York State Department of Public Service from 2014 to July 2016. Ms. Harriman received a J.D. from the Albany Law School of Union University and a Bachelor of Arts degree in Political Science and Economics from Siena College.

    We believe Ms. Harriman’s qualifications to sit on our Board include her extensive experience in the energy industry, including her experience with major energy policy initiatives in New York for the past 20 years.

    Lucas P. Schneider

    Age: 53

    Director since

    2017

    Board Committee: Corporate Governance and Nominating

    Class III Director: Continuing in

    office until the

    2023 Annual Meeting

    Lucas P. Schneider has served as a director of the Company since March 2017. Mr. Schneider is the Chief Executive Officer of Refraction AI, an autonomous last-mile delivery as a service company. Prior to his current role, Mr. Schneider was the Chief Operating Officer of Wejo, Ltd., an early-stage connected vehicle data marketplace company from 2019 to 2020. Mr. Schneider also served as the Chief Executive Officer of Silvercar, an Austin, TX-based start-up that focuses on the rental car space and other vehicle mobility applications from 2012 until December 2018. In 2017, Silvercar was acquired by Audi AG. 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 has also held various positions with Ford. Mr. Schneider received a Master of Business Administration, specializing in Operations and Strategy from the Tepper School of Business at Carnegie Mellon University and a Bachelor of Science degree in Mechanical Engineering from University of Texas at Austin.

    We believe Mr. Schneider’s qualifications to sit on our Board include his extensive experience in helping guide companies, ranging from start-ups to large enterprises, through major business milestones including IPOs, mergers, acquisitions, and product development.

    Jonathan Silver

    Age: 63

    Director since

    2018

    Board Committee: Corporate Governance and Nominating

    Class III Director: Continuing in

    office until the

    2023 Annual Meeting

    Jonathan Silver has served as a director of the Company since June 2018. He is a Senior Advisor to Guggenheim Partners, a large asset manager and investment bank, where he works with a wide array of the firm’s clean energy and sustainability clients. Mr. Silver is considered one of the nation’s leading clean economy investors and advisors,. From 2009-2011, he led both the federal government’s $40 billion clean energy investment fund and its $20 billion fund focused on advanced vehicle technology. From 2011-2018, he was a Senior Advisor to ICF, one of the country’s largest energy and environmental consulting firms, NextEra, the nation’s largest energy provider, and Marathon Capital, a leading power industry-focused investment bank. From 2015-2019, Mr. Silver served as the Managing Partner of Tax Equity Advisors LLC, an advisory firm managing investments in solar power projects on behalf of large corporations. He currently sits on the boards of National Grid (NGG:NSYE), a global utility, the Peridot Special Purpose Acquisition Corporation and Intellihot, a leading player in the tankless water heating sector. Earlier, he served on the board of Eemax and Sol Systems. From 1999-2008, Mr. Silver was the co-founder of Core Capital Partners, a successful venture capital investor in battery technology, advanced manufacturing, telecommunications and software. From 1990 to 1992, he was a Managing Director, and the Chief Operating Officer of Tiger Management, one of the country’s largest and most successful hedge funds. He has also held senior operating positions, including chief operating officer and executive vice president, in several companies. Mr. Silver began his career in 1982 at McKinsey and Company, a global management consulting firm, working on strategic issues for some of the nation’s largest financial institutions and corporations. Mr. Silver has served as a senior advisor to three U.S. Cabinet Secretaries: Commerce (1992 to 1993), Interior (1993 to 1995) and Treasury (1992 to 1994). He is on the board of Resources for the Future and has been on the boards of the American Federation of Scientists, the Wind Energy Foundation and American Forests.

    We believe Mr. Silver’s qualifications to sit on our Board include his extensive experience with the alternative energy industry.

    The Board of Directors has serveddetermined that Messes. Helmer and Harriman, Dr. Kenausis, Dr. Song and Messrs. McNamee, Willis, Silver, Roth and Schneider are independent directors as Chief Executive Officer, Presidentdefined in Rule 5605(a)(2) under the Marketplace Rules of the National Association of Securities Dealers, Inc. (the “NASDAQ Rules”).

    Investor Agreement

    Pursuant to the Investor Agreement (the “Investor Agreement”), dated as of February 24, 2021, between the Company, Grove Energy Capital LLC (“Grove Energy”), SK Holdings, Co., Ltd (“SK Holdings”), and member ofSK E&S Co., Ltd. (“SK E&S”), Grove Energy is entitled to designate one person (the “SK Designee”) to be appointed to the Board of Directors of the Company since April 2008. As President and CEO, Marsh plans and directs all aspects ofCompany.

    Grove Energy has the organization's policies and objectives, and is focused on buildingright to require the Board to nominate a company that leverages Plug Power's combination of technological expertise, talented people and focus on sales growth to continue the Company's leadership stance in the future alternative energy economy. 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 productsSK Designee for election to the telecommunications sector. During Mr. Marsh's tenure, Valere Power received many awards such asBoard by 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 represents the Company in its role as supporting member of the Hydrogen council, a global initiative of leading energy, transport and industry companies with a united vision and long-term ambition for hydrogen to foster the energy transition. Mr. Marsh is a member of the board of directors of GEVO, Inc. and the Capital Region Center for Economic Growth. Mr. Marsh holds a Bachelor of Science in Electrical Engineering Technology from Temple University, where he is a member of the 2017 Gallery of Success, 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 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 directorstockholders of the Company since 2003. Mr. Willis joined Zygo Corporation's Boardat annual stockholder meetings until the earliest of Directors(i) the date on which Grove Energy and affiliates beneficially own less than 4.0% of our issued and outstanding Common Stock, (ii) February 24, 2023, in June 2009 after retiringthe event that the Company and SK E&S have not entered into a definitive joint venture agreement with respect to a joint venture in Asia (the “Asia JV Agreement”), and (iii) any expiration or termination of the Asia JV Agreement.

    Grove Energy selected Dr. Song as Chairman ofthe SK Designee and 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 Foxboro Company, a manufacturer of process control instruments and systems. Mr. Willis holds a Bachelor of Science degree in Mechanical Engineering from Worcester Polytechnic Institute. We believe Mr. Willis' qualifications to sit on our Board include his extensive experience in management and director positions with similar companies, as well as his educational background in mechanical engineering.

    Maureen O. Helmer has been a director of the Company since 2004. Ms Helmer is currently a member of the law firm Barclay Damon, LLP and is the Co-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 policy and government affairs issues. In addition to serving 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 Electric Generation Siting and the Environment. Prior to her appointment as Chair, Ms. Helmer served as Commissioner of the Public Service Commission from 1997 until 1998 and was General Counsel to the Commission from 1995 through 1997. From 1984 through 1995, Ms. Helmer held several positions in the New York Legislature, including Counsel to the Senate Energy Committee. She also served as a board member of the New York State Energy Research and Development Authority, the New York State Environmental Board and the New York State Disaster Preparedness Commission during her tenure as Chair of the PSC. In addition, she was Vice Chair of the Electricity Committee of the National Association of Regulatory Utility Commissioners and a member of the NARUC Board of Directors. She was also appointed to serve as a member of the New 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 NY 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 practice law in New York. We believe Ms. Helmer's qualifications to sit on our Board include her long history of experience with energy regulation, policy and government affairs and advising energy and industrial companies.

    George C. McNamee serves as Chairman of the 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 rapid- growth companies, technological change, crisis management, team building and strategy. As a public company director, 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 last 11 of those years. He


    served as a NYSE director from 1999 to 2004 and chaired its foundation. In the aftermath of the 1987 stock market crash, he chaired the Group of Thirty Committee to reform the Clearance 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 theTales of the Hoffman, which sold over 200,000 copies. He received his Bachelor of Arts degree from Yale University. We believe Mr. McNamee's qualifications to sit on our Board include his experience serving on countless boards, his background in investment banking and experience with the financial sector and its 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 businesses 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 Board include his background in financial investments, financial and risk management and equity capital markets as well as his experience in management positions.

    Gregory L. Kenausis has been a director since October 2013. Mr. Kenausis is the founding partner and since 2005 has been the Chief Investment Officer of Grand Haven Capital AG, an investment firm, where he is the head of research and trading activity and is responsible for managing the fund's operations and structure. We believe Mr. Kenausis's qualifications to sit on our Board include his background and senior level experience in financial investments, trading and management and equity capital markets.

    Lucas P. Schneider has served as a director since March 2017. Prior to founding his current venture, Rollercast, LLC, Mr. Schneider has served as the Chief Executive Officer of Silvercar, an Austin, TX-based start-up that focuses on the rental car space and other vehicle mobility applications from 2012 until December, 2018. In 2017, Silvercar was acquired by Audi AG. 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 has also held various positions with Ford. He received a Master of Business Administration, specializing in Operations and Strategy from the Tepper School of Business at Carnegie Mellon University and a Bachelor of Science degree in Mechanical Engineering from University of Texas at Austin. We believe Mr. Schneider's qualifications to sit on our Board include his extensive experience in helping guide companies, from start-ups to large enterprises, through major business milestones including IPOs, mergers, acquisitions, and product development.

    Gregory B. Graves has served as a director since May 2017. Since 2007 Mr. Graves has served as Chief Financial Officer of Entergris, a leading global developer, manufacturer and supplier of microcontamination control products, specialty chemicals and advanced materials handling solutions for manufacturing processes in the semiconductor and other high technology industries. Prior to that, he served as Senior Vice President, Strategic Planning & Business Development at Entergris. He held positions in investment banking and corporate development, including at U.S. BanCorp. Piper Jaffray from June 1998 to August 2002 and at Dain Rauscher (now RBC Capital Markets) from October 1996 to May 1998. Prior to 1996, he held positions with Deloitte, General Motors, and The Pillsbury Company. He served as Director of Therma-wave Inc. from December 2005 to May 2007. He is a Certified Public Accountant (non-current). Mr. Graves received a Bachelor of Science degree and Masters in Accounting from the University of Alabama and a Masters of Business Administration from the Darden School at the University of Virginia. We believe Mr. Graves's qualifications to sit on our Board include his background in accounting and finance.


    Jonathan Silver has servedDr. Song as a director of the Company since June 2018. Mr. Silver is oneon February 24, 2021.

    Board Leadership Structure

    The positions of Chief Executive Officer and Chairman of the nation's leading clean economy investorsBoard are currently separated, with Andrew J. Marsh serving as our Chief Executive Officer since 2008 and advisors. Named oneGeorge C. McNamee serving as Chairman of the country's top-ten green-tech "influencers", Mr. Silver led bothBoard since 1997. Separating these positions allows our Chief Executive Officer to focus on the federal government's $40 billion cleanCompany’s day-to-day business operations, while allowing the Chairman to lead the Board in its fundamental role of providing advice to and independent oversight of management. The Board recognizes the time, effort and energy investment fundthat the Chief Executive Officer is required to devote to his position in the current business environment, as well as the commitment required to serve as our Chairman. While our By-laws and its $20 billion fund focused on electric vehicles from 2009 to 2011. Today, Mr. Silvercorporate governance guidelines do not require that our Chairman and Chief Executive Officer positions be separate, the Board believes that our current leadership structure is appropriate because it provides an effective balance between strategy development and independent leadership and management oversight. If the Managing Partnerposition of Tax Equity Advisors LLC, a Registered Investment Advisor managing investments in solar power projects on behalfChairman is vacant, or if he or she is absent, the Chief Executive Officer will preside, when present, at meetings of large corporations. He has held that position since 2015. From 2016 to 2017, he served as Senior Advisor to Marathon Capital, a leading power industry-focused investment bank. He served is currently a Senior Advisor to ICF, onestockholders and of the country's largest energy and environmental consulting firms, and to NextEra, a large energy provider. Mr. Silver has been a memberBoard of the board of directors of Intellihot, a leading player in the tankless water heating industry, since 2018, and earlier served on the boards of directors of energy efficiency company, EEmax, (from 2012 to 2015) and Sol Systems (from 2012 to 2014), a clean energy investment bank and the largest SREC (solar renewable energy credit) aggregator in the US. In 1999, Mr. Silver was the co-founder of Core Capital Partners, a successful venture capital investor in battery technology, advanced manufacturing, telecommunications and software. From 1990 to 1992, he was a Managing Director, and the Chief Operating Officer of TigerDirectors.

    Risk Management one of the country's largest and most successful hedge funds. He has also held senior operating positions (COO, Exec VP) in several companies. Mr. Silver began his career in 1984 at McKinsey and Company, a global management consulting firm, working on strategic planning efforts for some of the nation's largest financial institutions and corporations until 1998. Mr. Silver has served as a senior advisor to four U.S. Cabinet Secretaries: Energy (2009 to 2011), Commerce (1992 to 1993), Interior (1993 to 1995) and Treasury (1992 to 1994). He is, or has been, on the boards of the Wind Energy Foundation and American Forests (the nation's oldest forest conservation organization). We believe Mr. Silver's qualifications to sit on our board include his extensive experience with alternative energy industry.



    COMMITTEES AND MEETINGS OF THE BOARD OF DIRECTORS

            TheOur Board of Directors (the "Board")plays a central role in overseeing and evaluating risk. While it is management’s responsibility to identify and manage our exposure to risk on a day-to-day basis, the Board routinely discusses these risks with management and actively oversees our risk-management procedures and protocols. The Board regularly receives reports from senior management on areas of material risk to the Company, including operational, financial, legal, regulatory and strategic risks. In addition, each of the Company held 12 meetings during the fiscal year ended December 31, 2018 ("Fiscal 2018"). The Board has established three standing committees, an Audit Committee, (the "Audit Committee"), athe Compensation Committee (the "Compensation Committee"), and athe Corporate Governance and Nominating Committee (the "Governance Committee"). During Fiscal 2018,exercises oversight and provides guidance relating to the particular risks within the purview of each director attended at least 75% ofcommittee, as well as making periodic reports to the aggregate of (1) the total number of meetings of the Board (held during the period for which he or she has been a director) and (2) the total number of meetings of all committees of the Board on which the director served (during the periods that he or she served).

            Discussed below in greater detail, the Board administers its risk oversight function directly and through its Audit Committee, Corporate Governance and Nominating Committee, and Compensation Committee—see risk discussion in "Compensation Discussion and Analysis".full Board. The Board and each of these Committeescommittees regularly discuss with management our major risk exposures, their potential financial impact on Plug Power and the steps we take to manage them. The Audit Committee is responsible for oversight of Company risks relating to accounting matters, financial reporting and legal and regulatory compliance, while the Corporate Governance and Nominating Committee is responsible for oversight of risks relating to management and Board succession planning. The Compensation Committee is responsible for the oversight of risks related to compensation matters.

    The Chief Financial Officer and the General Counsel report to the Board regarding ongoing risk management activities at the regularly scheduled, quarterly Board meetings and may report on risk management activities more frequently, as appropriate. Additionally, risk management is a standing agenda item for the regularly scheduled, quarterly Audit Committee meetings.

    COMMITTEES AND MEETINGS OF THE BOARD OF DIRECTORS

    The Board of Directors of the Company held thirteen meetings during the fiscal year ended December 31, 2020 (“Fiscal 2020”). The Board has established three standing committees: the Audit Committee, the Compensation Committee, and the Corporate Governance and Nominating Committee. During Fiscal 2020, each director attended at least 75% of the aggregate of (1) the total number of meetings of the Board (held during the period for which he or she has been a director) and (2) the total number of meetings of all committees of the Board on which the director served (during the periods that he or she served).

    Audit Committee

    The Audit Committee consists of Messrs. GravesDr. Kenausis (Chair), and Mr. Willis, Kenausis, and Ms.Messes. Harriman and Helmer. Kimberly A. Harriman was appointed as a member of the Audit Committee on February 18, 2021. The Audit Committee held sevenfive meetings during Fiscal 2018 and each member attended at least 75% of the meetings during the period in which such person served on the committee.2020.

    Audit Committee Report

    The Audit Committee of the Board is currently composed of four directors, each of whom is an independent director as defined in the NASDAQ Rules and the applicable rules of the Securities and Exchange Commission ("SEC").SEC. In addition, the Board has made a determinationdetermined that Mr. GravesDr. Kenausis qualifies as an "audit“audit committee financial expert"expert” as defined in the applicable rules of the SEC. Mr. Graves'Dr. Kenausis’ designation by the Board as an "audit“audit committee financial expert"expert” is not intended to be a representation that he is an expert for any purpose as a result of such designation, nor is it intended to impose on him any duties, obligations, or liability greater than the duties, obligations or liability imposed on him as a member of the Audit Committee and the Board in the absence of such designation.

    The Audit Committee'sCommittee’s primary responsibility is for oversight of the Company'sCompany’s accounting and financial reporting processes, audits of the Company'sCompany’s financial statements, and internal control over financial reporting. A more complete description of the Audit Committee'sCommittee’s functions is set forth in the Audit Committee'sCommittee’s charter which is published on the "Investors"“Investors” section of the Company'sCompany’s website at www.plugpower.com. Our website is not incorporated into or a part of this Proxy Statement.

    In accordance with the Audit Committee'sCommittee’s charter, management has the primary responsibility for the financial statements and the financial reporting process, including maintaining an adequate system of internal controls over financial reporting. The Company'sCompany’s independent auditors,registered public accounting firm, KPMG LLP, ("KPMG"), reportreports directly to the Audit Committee and are responsible for performing an independent


    integrated audit of the Company'sCompany’s consolidated financial statements and internal control over financial reporting, in accordance with the standards of the Public Company Accounting Oversight Board (United States). The Audit Committee, among other matters, is responsible for (i) appointing the Company'sCompany’s independent auditors,registered public accounting firm, (ii) evaluating such independent auditors'registered public accounting firm’s qualifications, independence and performance, (iii) determining the compensation for such independent registered public accounting firm, and (iv) approvingpre-approving all audit and non-audit services. Additionally, the Audit Committee is responsible for oversight of the Company'sCompany’s accounting and financial reporting processes and auditsthe integrated audit of the Company'sCompany’s financial statements and internal control over financial reporting, including the work of the independent auditors.registered public accounting firm. The Audit Committee reports to the Board with regard to:

      the scope of the annual integrated audits;

    fees to be paid to the independent auditors;

    registered public accounting firm;

    the performance of the Company'sCompany’s independent auditors;

    registered public accounting firm;

    compliance with accounting and financial policies; and

    the Company'sCompany’s procedures and policies relative to the adequacy of internal controls over financial reporting.

    The Audit Committee reviewed and discussed with management of the Company and KPMG LLP the Company's 2018 quarterly unaudited interimCompany’s audited consolidated financial statements and 2018 annual consolidated financial statements,for the fiscal year ended December 31, 2020, including management'smanagement’s assessment of the effectiveness of the Company'sCompany’s internal controls over financial reporting as of December 31, 2018. Management has represented to2020.

    On March 16, 2021, the Company and the Audit Committee concluded that, because of errors identified in the Company'sCompany’s previously issued financial statements, the Company’s audited consolidated financial statements as of and for the years ended December 31, 2019 and 2018 and its unaudited quarterly consolidated financial statements as of and for each of the quarterly periods ended March 31, 2020 and 2019, June 30, 2020 and 2019, September 30, 2020 and 2019 and December 31, 2019 were preparedrestated. These errors were identified after the Company reported its 2020 fourth quarter and year end results on February 25, 2021. The Company determined that these errors were the result of a material weakness in accordance with U.S. generally accepted accounting principles,internal control over financial reporting which are described in Part II, Item 9A, “Controls and Procedures” in the Annual Report on Form 10-K for the year ended December 31, 2020 (the “Form 10-K”).

    Management performed an assessment of the effectiveness of our internal control over financial reporting and concluded that theour internal control over financial reporting was not effective as of December 31, 2018.2020. Management identified the following deficiency in internal control over financial reporting as of December 31, 2020: the Company did not maintain a sufficient complement of trained, knowledgeable resources to execute its responsibilities with respect to internal control over financial reporting for certain financial statement accounts and disclosures. As a consequence, the Company did not conduct an effective risk assessment process that was responsive to changes in the Company’s operating environment and did not design and implement effective process-level controls activities in the following areas:

     

    (a)

    Presentation of operating expenses;

    (b)

    Accounting for lease-related transactions;

    (c)

    Identification and evaluation of impairment, accrual for loss contracts, certain expense accruals, and deemed dividends; and

    (d)

    Timely identification of adjustments to physical inventory in interim periods.

    As reported in the Form 10-K and the Form 10-Q for the quarter ended March 31, 2021, the Company continues to take steps to remediate this material weakness and will continue to take further steps until such remediation is complete. These steps include the following:

    (a)

    Hiring additional resources, including third-party resources, with the appropriate technical accounting expertise, and strengthening internal training, to assist the Company in identifying and addressing any complex technical accounting issues that affect the Company’s consolidated financial statements.

    (b)

    Designing and implementing a comprehensive and continuous risk assessment process to identify and assess risks of material misstatements and ensuring that the impacted financial reporting processes and related internal controls are properly designed, maintained, and documented to respond to those risks in the Company’s financial reporting.

    (c)

    Implementing more structured analysis and reviewing procedures and documentation for the application of generally accepted accounting principles in the United States (“GAAP”), complex accounting matters, and key accounting policies.

    (d)

    Augmenting the Company’s current estimation policies and procedures to be more robust and in-line with overall market dynamics, including an evaluation of the Company’s operating environment in order to ensure operating effectiveness of certain process-level control activities.

    The Company also intends to deploy new tools and tracking mechanisms to help enhance and maintain the appropriate documentation surrounding its classification of operating expenses.

    The Company will report regularly to the Audit Committee on the progress and results of the remediation plan, including the identification, status, and resolution of internal control deficiencies.

    As the Company works to improve its internal control over financial reporting, the Company may modify its remediation plan and may implement additional measures as it continues to review, optimize and enhance its financial reporting controls and procedures in the ordinary course. The material weakness will not be considered remediated until the remediated controls have been operating for a sufficient period of time and can be evidenced through testing that they are operating effectively. The material weakness has not been remediated as of March 31, 2021. For more information about the restatement, including impacts on the Company’s financial statements, and the Company’s remediation plan, see the Form 10-K that is available at www.proxyvote.com.

    Additionally, the Audit Committee has discussed with KPMG anyLLP other matters required to be discussed under professional standards which include, among other items, matters related to the conduct of the audits of the Company's annual consolidated financial statements and internal control over financial reporting.standards. The Audit Committee has also discussed related party transactions, the critical accounting policies used in the preparation of the Company'sCompany’s annual consolidated financial statements, alternative treatments of financial information within U.S generally accepted accounting principlesGAAP that KPMG LLP discussed with management, if any, and the ramifications of using such alternative treatments and other written communications between KPMG LLP and management.

    KPMG LLP has provided to the Audit Committee the written disclosures and the letter required by the applicable Public Company Accounting Oversight Board requirements for independent auditors'public accounting firm’s communications with audit committees concerning auditor independence, and the Audit Committee discussed with KPMG LLP that firm'sfirm’s independence. The Audit Committee has also concluded that KPMG'sKPMG LLP’s performance of services is compatible with KPMG'sKPMG LLP’s independence.

            The Audit Committee also discussed with KPMG their overall scope and plans for their audits of the consolidated financial statements and internal control over financial reporting, and met with KPMG, with and without management present, to discuss the results of their audits and the overall quality of the Company's financial reporting. The Audit Committee also discussed with KPMG whether there were any audit problems or difficulties, and management's response.

    In reliance on the reviews and discussions referred to above, the Audit Committee recommended to the Board, of Directors, and the Board has approved, the inclusion of audited consolidated financial


    statements in the Company'sCompany’s Annual Report on Form 10-K for the year ended December 31, 2018.2020 for filing with the SEC. This report is provided by the following independent directors, who constitute the Audit Committee:

      Gregory B. GravesL. Kenausis (Chairman)

      Kimberly A. Harriman

      Maureen O. Helmer

      Gary K. Willis
      Gregory L. Kenausis

    Independent Auditors'Auditors’ Fees

    The following table presents fees for professional services rendered by KPMG LLP for the integrated audit of the Company'sCompany’s annual financial statements and internal control over financial reporting and fees billed for other services rendered by KPMG:KPMG LLP:

     
     2018 2017 

    Audit Fees

     $723,000 $670,000 

    Audit-Related Fees

     $274,500 $202,500 

    Tax Fees

         

    All Other Fees

         

    Total

     $997,500 $872,500 

     

       2020   2019 

    Audit Fees

      $3,911,900   $1,064,325 

    Audit-Related Fees

      $30,000   $30,000 

    Tax Fees

       —      —   

    All Other Fees

       —      —   
      

     

     

       

     

     

     

    Total

      $3,941,900   $1,094,325 

    In the above table, and in accordance with SEC definitions and rules: (1) "audit fees"“audit fees” are fees for professional services for the audit of the Company'sCompany’s consolidated financial statements included in Form 10-K, audit of the Company'sCompany’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"“audit-related fees” are fees for assurance and related services that are reasonably related to the performance of the audit or review of the Company's Company’s

    consolidated financial statements; (3) "tax fees"“tax fees” are fees for tax compliance, tax advice, and tax planning; and (4) "all“all other fees"fees” are fees for any services not included in the first three categories.

    The Audit Committee approvedpre-approved all audit and non-auditaudit-related services provided to the Company by KPMG LLP during Fiscal 2018.2020.

    Compensation Committee

    The Compensation Committee consists of Messrs. Willis (Chair), McNamee,Roth and Roth,McNamee, each of whom is an independent director under the NASDAQ Rules. The Compensation Committee held fourfive meetings during Fiscal 2018.2020. See "Compensation“Compensation Committee Report"Report” and "Compensation“Compensation Committee Interlocks and Insider Participation"Participation” for a further description of the activities of the Compensation Committee and its activities in Fiscal 2018.2020. The Compensation Committee'sCommittee’s primary responsibilities include (i) dischargingreviewing, prescribing and approving compensation policies, plans and programs that are appropriate for the responsibilitiesCompany in light of all relevant circumstances, that provide incentives to achievement of the Board relating to compensationCompany’s goals and objectives, that are consistent with the culture of the Company'sCompany and that further the overall goal of building stockholder value; and (ii) reviewing and approving changes to the Company’s executive officers (ii) providing oversight ofand management team as the Company's benefit, perquisiteCompany’s needs and employee equity programs, and (iii) reviewing the adequacy of the Company's management succession plans.priorities evolve over time. A more complete description of the Compensation Committee'sCommittee’s functions is set forth in the Compensation Committee'sCommittee’s charter which is published on the "Investors"“Investors” section of the Company'sCompany’s website atwww.plugpower.com. Our website is not incorporated into or a part of this Proxy Statement.

    Corporate Governance and Nominating Committee

    The Corporate Governance and Nominating Committee (the "Governance Committee") consists of Ms. Helmer (Chair) and Messrs. Roth, Schneider Roth and Silver, each of whom is an independent director under the NASDAQ Rules. The Corporate Governance and Nominating Committee held four meetings during Fiscal 2018.2020. The Corporate Governance Committee'sand Nominating Committee’s responsibilities include (i) establishing criteria for Board and


    committee membership, (ii) considering director nominations consistent with the requirement that a majority of the Board be comprised of independent directors as defined in the NASDAQ Rules, (iii) identifying individuals qualified to become board members, and (iv) selecting the director nominees for election at each Annual Meetingannual meeting of Stockholders.stockholders. The Corporate Governance and Nominating Committee is also responsible for developing and recommending to the Board a set of corporate governance guidelines applicable to the Company and periodically reviewing such guidelines and recommending any changes thereto. A more complete description of the Corporate Governance Committee'sand Nominating Committee’s functions is set forth in the Corporate Governance Committee'sand Nominating Committee’s charter which is published on the "Investors"“Investors” section of the Company'sCompany’s website atwww.plugpower.com. Our website is not incorporated into or a part of this Proxy Statement.

    Corporate Governance Guidelines

    We have adopted corporate governance guidelines that serve as a flexible framework within which our Board of Directors and its committees operate. These guidelines cover a number of areas including Board membership criteria and director qualifications, director responsibilities, Board structure, Board member access to management and independent advisors, director compensation, director orientation and continuing education, evaluation of senior management and management succession planning. A copy of our corporate governance guidelines published on the “Investors” section of the Company’s website at www.plugpower.com. Our website is not incorporated into or a part of this Proxy Statement.

    Code of Conduct

    We have adopted a code of conduct applicable to all of our directors, officers and employees, including our principal executive officer, principal financial officer and principal accounting officer. Our code of conduct is a “code of ethics” as defined in Item 406(b) of Regulation S-K and embodies our principles and practices relating

    to the ethical conduct of our business and our long-standing commitment to honesty, fair dealing and full compliance with all laws affecting our business. In the event that we amend or waive certain provisions of our code of conduct in a manner that requires disclosure under applicable rules, we intend to provide such required disclosure on our website in accordance with applicable SEC and NASDAQ Rules. Our code of ethics is available on our website at www.plugpower.com under Investor Relations. Our website is not incorporated into or a part of this Proxy Statement.

    Director Compensation

    The Compensation Committee periodically reviews the Company's Company’s Non-Employee Director Compensation Plan (the "Plan"“Plan”) to ensure that the compensation aligns the directors'directors’ interests with the long-term interests of the stockholders and that the structure of the compensation is simple, transparent and easy for stockholders to understand. The Compensation Committee also considers whether the Plan fairly compensates the Company'sCompany’s directors when considering the work required in a company of the size and scope of the Company.Company, and looks at peer group compensation for directors to determine whether our director compensation is reasonable and competitive in relation to our peers. Employee directors do not receive additional compensation for their services as directors.

    During 2018, the Compensation Committee engaged Radford, part of Aon plc, (Radford) as an independent compensation consultant to aid the Compensation Committee in its oversight of executive compensation and non-employee director compensation. See "Independent Compensation Consultant" under "Executive Compensation" for further discussion.

            Pursuant2020, pursuant to the Plan, upon initial election or appointment to the Board, each non-employee directors receive director received a non-qualified stock options equivalentoption to purchase a number of shares equal to $150,000 in value,divided by the closing price of our Common Stock on the grant date, with an exercise price equal to fair market value of the Common Stock on the grant date and that becomebecomes fully vested and exercisable on the first anniversary of the grant date. Each year of a non-employee director's tenure, theIn 2020, each director receivesreceived an annual equity grant equivalentcomprised of (i) a non-qualified stock option for a number of shares equal to $125,000 in value that is paid 50% in non-qualified stock options$62,500 divided by the closing price of our Common Stock on the date of grant and 50% in(ii) a number of shares of restricted Common Stock.Stock equal to $62,500 divided by the closing price of our Common Stock on the grant date. The stock option portion of the grant has an exercise price equal to the fair market value of our Common Stock on the grant date and becomes fully vested and exercisable on the first anniversary of the grant date. The restricted Common Stock grant becomes fully vested on the first anniversary of the grant date.

            UnderDuring 2020, under the Plan, each non-employee director iswas paid an annual retainer of $40,000 ($85,000 for any non-employee Chairman) for his or her services. Committee members receivereceived additional annual retainers for their service on committees of the Board in accordance with the following table:

    Committee
     Chairman Member 

    Audit Committee

     $20,000 $15,000 

    Compensation Committee

      15,000  5,000 

    Corporate Governance and Nominating Committee

      10,000  5,000 

     

    Committee

      Chairman ($)   Member ($) 

    Audit Committee

       20,000    15,000 

    Compensation Committee

       15,000    5,000 

    Corporate Governance and Nominating Committee

       10,000    5,000 

    These additional payments for service on a committee are due to the workload and broad-based responsibilities of the committees. The total amount of the annual retainer is paid in a combination of 50% cash and 50% Common Stock, provided that the director may elect to receive a greater portion (up to 100%) of the total retainer in Common Stock. All Common Stock issued for the annual retainers is fully vested at the time of issuance and is valued at its fair market value on the date of issuance. Non-employee directors are also reimbursed for their direct expenses associated with their attendance at boardBoard meetings.


    Non-Employee DirectorThe Compensation TableCommittee regularly reviews non-employee

    director compensation in comparison to our industry peer group, and considers growth in our market capitalization and sales, and other relevant factors including periodic independent market assessments. The following table provides informationPlan was amended by the Board in September 2020, effective as of January 1, 2021, to provide for non-employee directors who served during Fiscal 2018.

    Name
     Fees Earned
    or Paid in
    Cash(1) ($)
     Stock
    Awards(2)
    ($)
     Option
    Awards(3)
    ($)
     Total ($) 

    Douglas Hickey(4)

      20,700      20,700 

    Gary Willis

      70,000  62,500  49,556  182,056 

    George McNamee

      90,000  62,500  49,556  202,056 

    Gregory Kenausis

      55,000  62,500  49,556  167,056 

    Johannes Minoh Roth

      53,016  62,500  49,556  165,072 

    Gregory Graves

      60,000  62,500  49,556  172,056 

    Maureen Helmer

      61,984  62,500  49,556  174,040 

    Jonathan Silver(5)

      22,644    118,918  141,562 

    Lucas Schneider

      45,000  62,500  49,556  157,056 

    (1)
    Each of the following non-employee directors elected to receive all or a portion of their fees in stock in lieu of cash(i) an increase in the following amounts: Douglas Hickey ($10,350), Gary Willis ($35,000), George McNamee ($45,000), Gregory Kenausis ($55,000), Johannes Minoh Roth ($53,016), Gregory Graves ($30,000), Maureen Helmer ($30,992), Jonathan Silver ($11,322)annual retainer payable for service on the Board, and Lucas Schneider ($22,500).

    (2)
    This column represents(ii) an increase in the aggregate grant date fair value of the stock award computed in accordanceoption and restricted stock awards granted to non-employee

    directors upon initial election to the Board and annually. The adjustments to the annual retainer and equity grants were designed to be competitive with Financial Accounting Standardsour 2020 peer group.

    Effective January 1, 2021, pursuant to the Plan, upon initial election or appointment to the Board, ("FASB") Accounting Standards Codification ("ASC") Topic 718. Pursuanteach non-employee director (other than Dr. Song) will receive a non-qualified stock option to SEC rules, the amounts shown exclude the impactpurchase a number of estimated forfeitures. Fair value is calculated usingshares equal to $225,000 divided by the closing price of our Common Stock on the grant date, with an exercise price equal to fair market value of our Common Stock on the grant date and that becomes fully vested and exercisable on the first anniversary of the grant date. Each year of a non-employee director’s tenure, the director (other than Dr. Song) will receive an equity grant comprised of (i) a non-qualified stock option for a number of shares equal to $112,500 divided by the closing price of our Common Stock on the date of grant. Stock awards granted to directors vest immediately. For additional information on stock awards, refer to note 15the grant and (ii) a number of the Company's consolidated financial statements in our Form 10-K for the year ended December 31, 2018, as filed with the SEC. These amounts reflect the Company's accounting expense for these awards, and do not correspond to the actual value that will be recognized by the non-employee directors. As of December 31, 2018, the following non-employee directors each held 29,621 shares of restricted stock: Gary Willis, George McNamee, Gregory Kenausis, Johannes Minoh Roth, Gregory Graves, Maureen Helmer, and Lucas Schneider.

    (3)
    This column representsCommon Stock equal to $112,500 divided by the aggregateclosing price of our Common Stock on the grant date. The stock option portion of the grant will have an exercise price equal to the fair market value of our Common Stock on the grant date fair valueand become fully vested and exercisable on the first anniversary of the option award computedgrant date. The restricted Common Stock grant will become fully vested on the first anniversary of the grant date.

    Effective January 1, 2021, under the Plan, each non-employee director (other than Dr. Song) will be paid an annual retainer of $60,000 ($125,000 for any non-employee Chairman) for his or her services. Committee members will receive additional annual retainers for their service on committees of the Board in accordance with FASB ASC Topic 718. Pursuantthe following table:

    Committee

      Chairman ($)   Member ($) 

    Audit Committee

       20,000    15,000 

    Compensation Committee

       15,000    5,000 

    Corporate Governance and Nominating Committee

       10,000    5,000 

    The total amount of the annual retainer is paid in a combination of 50% cash and 50% Common Stock, provided that the director may elect to SEC rules,receive a greater portion (up to 100%) of the amounts shown excludetotal retainer in Common Stock. All Common Stock issued for the impactannual retainers is fully vested at the time of estimated forfeitures. For additional informationissuance and is valued at its fair market value on the valuation assumptions with respectdate of issuance. Dr. Song will not receive any compensation as director (cash or equity) pursuant to option awards, refer to note 15the terms of the Company's consolidated financial statementsInvestor Agreement.

    Non-Employee Director Compensation Table

    The following table shows the compensation received or earned by each of our non-employee directors in Fiscal 2020. Mr. Marsh, who is our Form 10-KPresident and Chief Executive Officer, did not receive any additional compensation for the year ended December 31, 2018,his service as filed with the SEC. These amounts reflect the Company's accounting expense for these awards, and do not correspond to the actual value that will be recognizeda director. The compensation received by the non-employee directors. As of December 31, 2018, the non-employee directors held options to purchase shares of Common StockMr. Marsh, as follows: Jonathan Silver (77,320), Gary Willis (236,064), George McNamee (258,464), Gregory Kenausis (193,964), Johannes Minoh Roth (203,964), Gregory Graves (128,731), Maureen Helmer (230,064) and Lucas Schneider (160,316).

    (4)
    Term as director ended May 16, 2018.

    (5)
    Term as director began June 25, 2018
    a named executive officer, is presented in “Executive Compensation—2020 Summary Compensation Table” above.

    Name

      Fees Earned
    or Paid in
    Cash(1)($)
       Stock
    Awards(2)
    ($)
       Option
    Awards(3)
    ($)
       Total($) 

    Gary K. Willis

       70,000    62,500    36,145    168,645 

    George C. McNamee

       90,000    62,500    36,145    188,645 

    Gregory L. Kenausis

       60,000    62,500    36,145    158,645 

    Johannes M. Roth

       50,000    62,500    36,145    148,645 

    Maureen O. Helmer

       65,000    62,500    36,145    163,645 

    Jonathan Silver

       45,000    62,500    36,145    143,645 

    Lucas P. Schneider

       45,000    62,500    36,145    143,645 

    (1)

    Each of the following non-employee directors elected to receive all or a portion of their annual retainers in Common Stock in lieu of cash in the following amounts: Gary K. Willis ($35,000), George C. McNamee


    ($45,000), Gregory L. Kenausis ($30,000), Johannes M. Roth ($50,000), Maureen O. Helmer ($32,500), Jonathan Silver ($28,125) and Lucas P. Schneider ($22,500).
    (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 our Common Stock on the date of grant. Stock awards granted to directors as part of their annual retainer are fully vested upon grant and annual restricted stock awards made to directors vest in full on the first anniversary of the grant date. For additional information on stock awards, refer to note 18 of the Company’s consolidated financial statements in this Annual Report on Form 10-K. These amounts reflect the Company’s accounting expense for these awards, and do not necessarily correspond to the actual value that will be recognized by the non-employee directors. As of December 31, 2020, the following non-employee directors each held 12,807 shares of restricted stock: Gary K. Willis, George C. McNamee, Gregory L. Kenausis, Johannes M. Roth, Maureen O Helmer, Jonathan Silver and Lucas P. Schneider.

    (3)

    This column represents the aggregate grant date fair value of 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 on the valuation assumptions with respect to option awards, refer to note 18 of the Company’s consolidated financial statements in this Annual Report on Form 10-K. These amounts reflect the Company’s accounting expense for these awards, and do not necessarily correspond to the actual value that will be recognized by the non-employee directors. As of December 31, 2020, the non-employee directors held options to purchase the following numbers of shares of Common Stock: Jonathan Silver (12,807), Gary K. Willis (170,827), George C. McNamee (128,827), Gregory L. Kenausis (233,827), Johannes M. Roth (243,827), Maureen O. Helmer (39,863) and Lucas P. Schneider (200,179).

    Policy Governing Director Attendance at Annual Meetings

            The Board has adopted a formal policy that allAll of our directors are expected to attend the Company'sCompany’s Annual Meetings of Stockholders, in person, unless doing so is impracticable due to unavoidable conflicts. At the time of the 20182020 Annual Meeting, the Company had nine (9)eight directors, eight (8)all of whom attended the 20182020 Annual Meeting.

    Policies Governing Director Nominations

      Securityholder Recommendations

    The Corporate Governance Committee'sand Nominating Committee’s current policy with regard to the consideration of director candidates recommended by securityholders is that it will review and consider any director candidates who have been recommended by one or more of the stockholders of the Company entitled to vote in the election of directors in compliance with the procedures established from time to time by the Corporate Governance and Nominating Committee. All securityholder recommendations for director candidates must be submitted to the Company'sCompany’s Corporate Secretary at Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110, who will forward all recommendations to the Corporate Governance and Nominating Committee. We did not receive any securityholder recommendations for director candidates for election at the 20192021 Annual Meeting. All securityholder recommendations for director candidates for election at the Company's 2020Company’s 2022 annual meeting must be submitted to the Company'sCompany’s Corporate Secretary not less than 90 days nor more than 120 days prior to July 30, 2022 (or no earlier than April 1, 2022 and no later than May 9, 2020, which dates are February 9, 2020 and January 10, 2020, respectively,1, 2022), and must include the following information:

      the name and address of record of the stockholder;

      a representation that the securityholder is a record holder of the Company'sCompany’s stock entitled to vote in the election of directors, or if the securityholder is not a record holder, evidence of ownership in accordance with Rule 14a-8(b)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"“Exchange Act”);

    the name, age, business and residential address, educational background, current principal occupation or employment, and principal occupation or employment for the preceding five (5) full fiscal years of the proposed director candidate;

    a description of the qualifications and background of the proposed director candidate which addresses the minimum qualifications and other criteria for membership on the Board approved by the Corporate Governance and Nominating Committee from time to time;

    a description of all arrangements or understandings between the securityholder and the proposed director candidate;

    the consent of the proposed director candidate (i) to be named in the proxy statement relating to the Annual Meetingannual meeting of Stockholdersstockholders and (ii) to serve as a director if elected at such annual meeting; and

    any other information regarding the proposed director candidate that is required to be included in a proxy statement filed pursuant to the rules of the SEC.

    Board Membership Criteria

    The Corporate Governance and Nominating Committee has established criteria for membership on the Board. These criteria include the following specific, minimum qualifications that the Corporate Governance and Nominating Committee believes must be met by a Corporate Governance Committee-and Nominating Committee recommended nominee for a position on the Board:


        and Nominating Committee, to be highly effective, in conjunction with the other nominees to the Board, in collectively serving the interests of the Company and its stockholders.

    In addition to the minimum qualifications for each nominee set forth above, the Corporate Governance and Nominating Committee will recommend that the Board select persons for nomination to help ensure that:

    Finally, in addition to any other standards the Corporate Governance and Nominating Committee may deem appropriate from time to time for the overall structure and composition of the Board, the Corporate Governance and Nominating Committee when recommending that the Board select persons for nomination, may consider whether the nominee has direct experience in the industry or in the markets in which the Company operates.

    The Corporate Governance and Nominating Committee will recommend to the Board the nomination of the director candidates who it believes will, together with the existing members of the Board and other nominees, best serve the interests of the Company and its stockholders.

    In considering whether to recommend any candidate for inclusion in the Board'sBoard’s slate of recommended director nominees, including candidates recommended by shareholders, the Company's Corporate Governance and

    Nominating Committee will apply the criteria set forth in our Corporate Governance Guidelines. These criteria include the candidate'scandidate’s integrity, business acumen, age, experience, commitment, diligence, conflicts of interest and the ability to act in the interests of all shareholders. Our Corporate Governance Guidelines specify that the value of diversity on the Board should be considered by the Corporate Governance and Nominating Committee in the director identification and nomination process. The Corporate Governance and Nominating Committee seeks nominees with a broad diversity of experience, professions, skills, geographic representation and backgrounds. The Corporate Governance and Nominating Committee does not assign specific weights to particular criteria and no particular criterion is necessarily applicable to all prospective nominees. The Company believes that the backgrounds and qualifications of the directors, considered as a group, should provide a significant composite mix of experience, knowledge and abilities that will allow the Board to fulfill its responsibilities. Nominees are not discriminated against on the basis of race, religion, national origin, sexual orientation, disability or any other basis proscribed by law. For a more comprehensive discussion of our Corporate Governance and Nominating Committee'sCommittee’s current policy with regard to the consideration of director candidates, please refer to "Policies“Policies Governing Director Nominations."

    To review the effectiveness of assessing the diverse skills, qualifications and backgrounds of director nominations, the Board and each of the three standing Board Committees conduct annual self-evaluations. In addition, the Corporate Governance and Nominating Committee monitors the effectiveness of these procedures on an ongoing basis.

    CORPORATE RESPONSIBILITY

    Plug Power recognizes that environmental, social and governance issues are of increasing importance to many investors. We are proud to have published our first Corporate Environmental, Social, and Governance (“ESG”) report this year. The report contains information about our approach to ESG and details our efforts to link environmental and social impacts to our business strategy to lead the global green hydrogen economy. The ESG report is posted on our website. As part of our ESG efforts, we are committed to fostering a positive and engaging culture of inclusion, care and support where all people throughout our global workforce can thrive. We believe that a diverse workforce and inclusive workplace is essential to our innovation and growth. We are also dedicated to strengthening and improving the quality of life in our communities through partnerships, engagement and employee giving. We believe that working together with our communities creates better outcomes on issues that matter to us all. Corporate responsibility is an enterprise-wide commitment and our executive team, supported by our Board of Directors, monitors and supports our corporate responsibility efforts.

    People and Communities

    We believe in making a positive impact in the communities where we live and work. From organizations dedicated to health, housing and development and children and families in need — we strive to empower the local community through philanthropic efforts. We also encourage our employees to donate to charitable organizations of their choice.

    Education

    We are active in educational engagement and seek to broaden the educational opportunities of students in our communities who demonstrate a passion for science and technology that extends beyond the classroom. Through hosting education tours for local school groups, supporting local science fairs and participating in the Future Cities program, we are working to empower the next generation of inventors.

    Sustainability

    We are committed to integrating sustainability into our day-to-day operations to conserve, protect and improve the environment we live in.

    Diversity and Inclusion

    We invest in the long-term development and engagement of our employees by aspiring to have an increasingly diverse workforce, inclusive environment, training and development programs and a culture where our people can thrive. We are committed to providing and supporting a work environment that promotes equality of opportunity among our employees. We strive for our workforce to be truly representative of all sections of society and for each employee to feel respected and able to perform at his or her best. In the United States, 23.6% of our employee population is considered diverse and 14.9% is female.

    Environmental, Health and Safety Policy

    As a leader in innovative solutions and services that drive technology advancements in the fuel cell industry, Plug Power is committed to responsible business — for our people and for the environment. This responsibility extends from our operations, to our diverse eco-system of partners, and to our customers. We are committed to continued integration and improvement of environmental, health and safety (EHS) management practices into our business.

    To demonstrate our commitment, Plug Power strives to:

    Care for our people and the environment by considering design for EHS principles from a life cycle perspective, in our product design and development, operations and supply chain;

    Protect our employees, community, and the environment by committing to pollution prevention, as well as to creating an injury-free workplace and safety-based culture. We promote a healthy lifestyle and encourage employee health and wellness and work-life balance;

    Engage suppliers to advance sustainability efforts;

    Comply with applicable EHS legal and other customer requirements. We also engage with our stakeholders to understand their needs and expectations;

    Set goals and objectives to address the most significant EHS impacts and risks resulting from our business operations, services and products; and

    Regularly monitor and evaluate our EHS performance results to demonstrate continual improvement.

    Plug Power leadership has developed and endorses this EHS Policy. In this capacity, leadership is responsible for communicating this policy to our stakeholders, as well as for its effective implementation. All Plug Power employees, suppliers and contractors are expected to uphold this policy and adhere to relevant company EHS policies, procedures and requirements.

    Climate Change Policy

    Climate change is a serious environmental, social and economic threat that calls for immediate and collaborative action among all sectors of society. Plug Power acknowledges its role in addressing this global issue and is committed to minimizing its greenhouse gas (GHG) emissions by:

    Taking actions to measure, track, reduce and report our climate footprint, which includes direct and indirect emissions resulting from our operations and our value chain by subscribing to the principles of the Task Force on Climate-related Financial Disclosures (TCFD);

    Determining appropriate targets for reducing GHG emissions for comparable companies;

    Determining appropriate targets for total water consumption;

    Identifying the risks of its business activities on the environment;

    Adopting a hazardous waste policy;

    Determining the portion of energy derived from renewable and non-renewable sources;

    Considering factors in product design and development that enhance energy efficiency and promote smarter energy use;

    Administering a commute alternatives program that provides employees incentives to commute by carpool, bike and transit where feasible; and

    Partnering with organizations that are working to address climate change.

    Plug Power leadership takes ownership and monitors our performance in reducing GHG emissions and mitigating climate change by factoring this into our organization’s strategies.

    Sustainability and Safety

    We are committed to providing a safe and healthful working environment for our employees, which includes maintaining compliance with all applicable federal, state and local laws, rules and regulations relating to workplace safety and conditions. We strive for zero work-related injuries or illnesses. To that end, we have implemented written programs, including a Health and Safety Program and an Injury and Illness Prevention Program, which set forth our policies and procedures for workplace safety, hazard identification and correction, compliance, communication, investigations, training and recordkeeping. Any significant safety or health matters are communicated to the Executive Management team, the appropriate Board of Director committees and/or the full Board of Directors.

    Contacting the Board of Directors

    You may contact any director of the Company by writing to them c/o Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110, Attention: Corporate Secretary. Your letter should clearly specify the name of the individual director or group of directors to whom your letter is addressed. Any communications received in this manner will be forwarded as addressed.

    Cautionary Note Regarding Forward-Looking Statements

    This Proxy Statement contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties. You can identify forward-looking statements by words such as “believe,” “expect,” “anticipate,” “intend,” “plan,” “aim,” “will,” “may,” “should,” “could,” “would,” “likely,” “estimate,” “predict,” “potential,” “continue” or other similar expressions. Actual results may differ from those set forth in the forward-looking statements due to a variety of factors, including those contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020 and the Company’s other filings with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date on which they are made. We undertake no obligation to update or revise any forward-looking statements.



    INFORMATION ABOUT OUR EXECUTIVE OFFICERS

    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 isbelow as of March 22, 2019.June 30, 2021.

    Executive Officers
    AgePosition

    Andrew MarshExecutive Officers

      Age63

    Position

    Andrew J. Marsh

    65  President, Chief Executive Officer and Director

    Paul B. Middleton

      5154  Senior Vice President and Chief Financial Officer

    Keith C. Schmid

      5658  Senior Vice President and Chief Operating Officer

    Gerard L. Conway, Jr.

      5457  General Counsel, Corporate Secretary and Senior Vice President

    Jose Luis CrespoSanjay K. Shrestha

      4749Chief Strategy Officer

    Jose Luis Crespo

    51  Vice President, Global Sales

    Martin D. Hull

      5153  Corporate Controller and Chief Accounting Officer

            The biographies of each of the executive 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, and information regarding the experiences, qualifications, attributes or skills that caused the Corporate Governance Committee and the Board to determine that the person should serve as an executive officer.

    Andrew Marsh'sJ. Marsh’s biographical information can be found in "Information about our Directors" in this Proxy Statement.“Directors” above.

    Paul B. Middletonjoined Plug Power Inc. as Senior Vice President and Chief Financial Officer in 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 tools division of Coopers Industries from 1997 to 2001. Mr. Middleton holds a Master of Science in Accounting and a BBA from the University of Central Florida. Additionally, he is a Certified Public Accountant.

    Keith C. Schmidjoined Plug Power Inc. as Senior Vice President and Chief 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 CEOChief Executive Officer of Boston-Power Incorporated, a provider of large format lithium ion battery solutions, in 2011, and as President and CEOChief Executive Officer of Power Distribution Incorporated, a power distribution and protection company, from 2007 to 2010. In addition, Mr. Schmid held the position of General Manager, Industrial Energy Division-Americas for Exide Technologies, a multinational lead-acid batteries manufacturing company, from 2001 to 2007. Mr. Schmid holds a Master of Science degree in Engineering and an M.B.A.a Master in Business Administration from the University of Wisconsin-Madison.

    Gerard L. Conway,Jr. has served as General Counsel and Corporate Secretary of Plug Power since September 2004 and, since March 2009, has also served as Senior Vice President.President of Plug Power. In that capacity, Mr. Conway is responsible for advising the Company on legal issues such as corporate law, securities, contracts, strategic alliances and intellectual property. He also serves as the Compliance Officer for securities matters affecting the Company. During his tenure at Plug Power, Mr. Conway served as Vice President of Government Relations from 2005 to June 2008 and in that capacity he advocated on energy issues, policies, legislation and regulations on the state, federal, national and international levels on behalf of the Company and the alternative energy sector. Prior to his appointment to his current position, Mr. Conway served as Associate General Counsel and Director of Government Relations for the Company beginning in July 2000. Prior to joining Plug Power, Mr. Conway spent four years as an Associate with Featherstonhaugh, Conway, Wiley & Clyne, LLP, where he concentrated in government relations, business and corporate law. Mr. Conway has more than twenty20 years of experience in general


    business, corporate real estate and government relations. Mr. Conway holds a Bachelor of Arts degree in English and Philosophy from Colgate University and a Juris Doctorate from Boston University School of Law.

    Sanjay K. Shrestha joined the Company as Chief Strategy Officer in 2019. Prior to joining Plug Power, Mr. Shrestha served as the Chief Investment Officer of Sky Solar Holdings, which owned and operated solar projects in Japan, Europe and the Americas, and President of Sky Capital America, which owned and operated solar projects in North and South America, since 2015. Under his leadership, Sky Capital America built and acquired over 100MW of operating solar assets and secured a pipeline over 100MW. He also sourced various types of financing solutions to support this growth, including project debt, construction equity and long-term equity. Before global solar IPP, he led the renewables investment banking effort at FBR Capital Markets since 2013. During 2014, and under his leadership, the firm was ranked among the top renewable energy underwriters in the United States. Prior to joining FBR Capital Markets, Mr. Shrestha was the global head of renewables research coverage at Lazard Capital Markets. During his tenure at Lazard Capital Markets, he was a member of the Institutional Investor All America Research team and was also ranked as one of the top five stock pickers on a global basis. Prior to Lazard Capital Markets, Mr. Shrestha was at First Albany Capital, where he built the firm’s renewables and industrial research practice. Mr. Shrestha serves as an independent director on the board of directors of Fusemachines, an artificial intelligence talent and education solutions company. Mr. Shrestha received a Bachelor of Science from The College of Saint Rose. He brings to the Company almost two decades of experience in the broader clean tech sector.

    Jose Luis Crespojoined the Company as Vice President of Business and International Sales in 2014. He was promoted to Vice President of Global Sales in January of 2015.2015 and in 2016 he was also named General Manager for Hypulsion, the Company’s wholly owned European subsidiary. Prior to joining the Company, Mr. Crespo served as Vice President of International Value Stream at Smiths Power, a supplier of power distribution, conditioning, protection and monitoring solutions for data centers, wireless communications and other critical or high-value electrical systems, from 2009 to 2013. Mr. Crespo holds a MastersMaster in Business Administration from the University of Phoenix and a degree in Telecommunications Engineering from the Engineering University of Madrid, Spain.

    Martin D. Hulljoined Plug Power Inc. as Corporate Controller and Chief Accounting Officer in April 2015. Prior to that, he was a principal and director with the certified 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 a total of 24 years of public accounting experience. Mr. Hull holds a BachelorsBachelor of Business Administration with a concentration in Accounting from the University of Notre Dame.

            Subject to any terms of any employment agreement with the Company (as further described in this Proxy Statement), each of the executive officers holds his or her respective office until the regular annual meeting of the Board following the Annual Meeting of Stockholders and until his or her successor is elected and qualified or until his or her earlier resignation or removal.


    EXECUTIVE COMPENSATION

    Compensation Discussion and Analysis

    This Compensation Discussion and Analysis discusses our compensation policies and determinations that apply to our named executive officers. When we refer to our “named executive officers” we are referring to the following individuals:

     

    Andrew J. Marsh, our President and Chief Executive Officer and a Director;

    Paul B. Middleton, our Chief Financial Officer and Senior Vice President;

    Sanjay K. Shrestha, our Chief Strategy Officer;

    Keith C. Schmid, our Chief Operating Officer and Senior Vice President; and

    Jose Luis Crespo, our Vice President-Global Sales.

    While the discussion in this section is focused on our named executive officers, many of our executive compensation programs apply broadly across our executive ranks. The following discussion should be read together with the compensation tables and related disclosures set forth below.

    Executive Summary

    Our Response to the Covid-19 Pandemic

    Like all companies, Plug Power was impacted by the Covid-19 pandemic. We provide whatrose to the challenge and our response is reflective of our culture and our commitment to our employees, to our customers and to society. Below are a few highlights:

    We prioritized the health and wellbeing of our employees and their families while continuing to deliver for our customers.

    As restrictions and shutdowns were announced in countries around the world, we believeimplemented new and imaginative ways for our employees to work at our facilities and remotely.

    We enabled our employees to remain focused on delivering for our customers by providing personal and financial “peace of mind” by assuring job security and not implementing salary reductions or furloughs.

    Our world-class engineers built ventilator prototypes to address the severe country-wide shortages.

    We deployed members of our engineering, manufacturing and logistics teams to design and 3D print thousands of face shields that were donated to healthcare facilities and communities.

    Our resourceful buyers sourced and coordinated personal protective equipment (PPE) distribution to hospitals.

    We facilitated the critical delivery operations of our customers providing essential services in the food, retail and cleaning supplies industries.

    We engaged in corporate philanthropy by making donations to several charitable organizations, including The United Way and The No Neighbor Hungry Campaign.

    The Covid-19 pandemic has highlighted the importance of innovative technology-driven solutions and imaginative human capital management to address an unprecedented crisis; it has also revealed just how interconnected we are as a society. We are proud of our Company’s response, and we are grateful for the extraordinary contribution of our employees to the success of Plug Power.

    2020 Business and Strategic Highlights

    2020 was an exceptional year for the Company. The Company successfully executed on its strategic growth pillars to reach significant milestones during 2020. 2020 results include the following achievements that impacted executive compensation:

    Strong financial performance with a record year in gross billings.

    Deployed more than 9,800 fuel cell units powering electric vehicles in 2020 and built over 27 hydrogen stations.

    Raised approximately $1.5 billion in proceeds from equity and debt offerings in 2020, including executing the first ever convertible green bond offering in the United States as well as the largest follow-on offering in the clean energy sector.

    Ended the year with a strong balance sheet with over $1.6 billion in cash to execute on its global growth strategy and objectives.

    Completed the strategic acquisitions of United Hydrogen Group, Inc. and Giner ELX, Inc., positioning the Company as a fully vertically green hydrogen generation company.

    Announced strategic partnerships with Brookfield Energy, Apex Clean Energy and ACCIONA to source renewable electricity and build liquid green hydrogen plants.

    Continued to make strides within the Company’s fuel cell system business across its target markets and drove further adoption in core material handling, on-road and stationary power markets, adding a fourth pedestal customer, an automotive manufacturer with over 50 plants worldwide, within its core market of material handling and selecting a site for its gigafactory to drive scale.

    Released multiple new ProGen engine models, including the 125kW (on and off-road applications) and 1kW (robotics and drone applications) units.

    Continued to make progress with the Company’s partner, Lightning Systems, to build “middle-mile” delivery vehicles, producing the first electric, fuel cell-powered class-6 truck.

    Signed a memorandum of understanding with Linde to deploy pilot class-6 and class-8 vehicles on road in 2021.

    Collaborated with Gaussin to bring a commercial suite of ProGen-powered Gaussin transportation vehicles to market in 2021 as a solution to decarbonize the logistics ecosystem.

    Released the GenSure HP product designed for large-scale back-up power applications, including data centers, energy storage systems and microgrids, including manufacturing production of the GenSure HP product line commencing in December of 2020.

    In addition, the Company made significant progress in solidifying its global leadership position in green hydrogen solutions by executing term sheets for a joint venture in France with Groupe Renault, a top automotive player, and a joint venture in Asia with a subsidiary of SK Holdings to bring hydrogen solutions to Korea, China and Vietnam, which joint ventures were announced in January 2021.

    Stockholder Value Creation

    Below is a competitiveline 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, 2015 and ending December 31, 2020. 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) and the Russell 2000 Index (RUT) Index on December 31, 2015 and the reinvestment of all dividends, if any.

    LOGO

    Index

      2015   2016   2017   2018   2019   2020 

    Plug Power Inc.

      $100.00   $56.87   $111.85   $58.77   $149.76   $1,607.11 

    NASDAQ Clean Edge Green Energy Index

      $    $96.38   $126.05   $109.45   $152.61   $434.93 

    Russell 2000 Index

      $100.00   $119.48   $135.18   $118.72   $146.15   $173.86 

    The graph above and the accompanying text are not “soliciting material,” are not deemed filed with the SEC and are not to be incorporated by reference in any filing by us under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, whether made before or after the date hereof and irrespective of any general incorporation language in any such filing.

    The stock price performance shown on the graph is not necessarily indicative of future price performance.

    Assuming the investment of $100 on December 31, 2015 and the reinvestment of dividends. The Common Stock price performance shown on the graph only reflects the change in our company’s Common Stock price relative to the noted indices and is not necessarily indicative of future price performance.

    Executive Compensation Program

    Our goal is to retain and attract experienced and talented executive officers and to motivate them to achieve our short-term and long-term financial, operational and strategic objectives that produce and promote stockholder value. To achieve this goal, we strongly emphasize a culture of pay for performance in order to provide incentives and accountability for our executive officers in working toward the achievement of our objectives. Accordingly, we have designed our incentive compensation packageprograms with the goal of ensuring that actual pay varies above or below targeted compensation opportunity based on achievement of challenging performance goals and demonstration of meaningful individual commitment and contribution.

    CEO 2020 Actual Pay Mix

    Average Other NEO

    2020 Actual Pay Mix

    LOGOLOGO

    Base salary reflects received base salary in fiscal 2020.

    Key elements of our compensation programs include the following:

    Compensation

    Element

    Purpose

    Features

    Base salaryTo attract and retain experienced and highly skilled executives.Fixed component of pay to provide financial stability, based on responsibilities, experience, individual contributions and peer company data.

    Annual cash incentive

    bonuses

    To promote and reward the achievement of key short-term strategic and business goals of the Company as well as individual performance; to motivate and attract executives.Variable component of pay based on annual corporate quantitative and qualitative goals. Importantly, although performance goals were established prior to the onset of the Covid-19 pandemic, the Compensation Committee did not reduce the goals in response to the pandemic.
    Long-term equity incentive compensationTo encourage executives and other employees to focus on long-term Company performance; to drive long-term stockholder value; to promote retention; to reward outstanding Company and individual performance.Typically subject to multi-year vesting based on continued service and are primarily in the form of stock options, premium priced stock options and restricted stock, the value of which depends on the performance of our Common Stock price, in order to align employee interests with those of our stockholders over the longer-term.

    Executive Compensation Practices

    The Compensation Committee reviews on an ongoing basis the Company’s executive compensation program to evaluate whether it supports the Company’s executive compensation objectives and is aligned with stockholder interests. Our executive compensation practices include the following, each of which the Compensation Committee believes reinforces our executive compensation objectives:

    What We Do

    What We Don’t Do

    ✓ Pay for performance by structuring a significant percentage of target annual compensation in the form of variable, at-risk compensation×Allow hedging of equity without preapproval
    ✓ Market comparison of executive compensation against a relevant peer group×Allow for re-pricing of stock options without stockholder approval
    ✓ Offer market-competitive benefits for executives that are consistent with the rest of our employees×Provide excessive perquisites
    ✓ Consult with an independent compensation consultant on compensation levels and practices×Provide supplemental executive retirement plans
    ✓ Maintain robust stock ownership guidelines×Provide any excise tax gross-ups
    ✓ Have a clawback policy that applies to cash and equity incentive compensation×Provide single-trigger severance arrangements
    ✓ Hold an annual say-on-pay vote
    ✓ Have a minimum vesting period of one year for equity awards, subject to certain limited exceptions

    Setting Executive Compensation

    The Compensation Committee is responsible for reviewing, and recommending to the Board for approval, the compensation of our executive officers, including our named executive officers. The Compensation Committee is composed entirely of non-employee directors who are “independent” as that term is defined in the applicable NASDAQ Rules. In making its recommendations regarding 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 executive management team through a combination ofCompensation Committee with respect to the appropriate base salary, annual incentive bonuses and performance measures, and grants of long-term equity incentive compensation, and broad-based benefits programs. We place emphasis on pay-for-performance based incentive compensation, which is designed to rewardawards for each of our executives based onother than himself. The Chairman of the achievement of predetermined performance goals. This Compensation Discussion and Analysis explains our compensation objectives, policies and practicesCommittee makes recommendations to the Compensation Committee with respect to each individual serving as ourthe Chief Executive Officer or Chief Financial Officer during 2018Officer’s compensation. The Compensation Committee makes its determination regarding executive compensation and then makes a recommendation to the Board for approval. The Board discusses the Compensation Committee’s recommendations and ultimately approves the compensation of the executive officers.

    In setting executive base salaries and annual cash bonuses and granting equity incentive awards, the Compensation Committee and the three most highly-compensated executive officers other thanBoard consider compensation for comparable positions in the market, the historical compensation levels of our Chief Executive Officerexecutives, individual performance as compared to our expectations and Chief Financial Officer, whoobjectives, our desire to motivate our employees to achieve short and long-term results that are collectively referredin the best interests of our stockholders, and a long-term commitment to as the "named executive officers."our Company.

    ObjectivesIndependent Compensation Consultant

    For purposes of Our Executive Compensation Programs

            Ourevaluating 2020 compensation programs for each of our named executive officers are designed to achieve the following objectives:


      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 2018, the Compensation Committee retained Radford as anits independent compensation consultantconsultant. Radford has not performed services for the Company other than consulting services related to provide advisory services to aidthe compensation and benefits of our executives and directors. Radford assisted the Compensation Committee in its oversightthe development of executivea compensation peer group and non-employee director compensation. Radford did not perform any other services for the Company in 2018. The Compensation Committee provided Radford with background regarding the goals of our compensation program and the parameterstheir market analysis of the competitive review of executive compensation packages to be conducted by Radford. Radford was instructed to benchmark allvarious components of compensation for allthe named executive officer positions, including base salary, annual cash bonus and equity compensation.

    Our Compensation Committee has analyzed whether the work of Radford raised any conflict of interest, taking into account relevant factors in accordance with SEC guidelines. Based on its analysis, our Compensation Committee determined that the engagement of Radford does not create any conflict of interest pursuant to the SEC guidelines and NASDAQ Rules.

    Peer Group Selection and Market Data

    In evaluating the total compensation of our named executive officers, our Compensation Committee, using information provided by Radford, established a peer group of publicly traded companies. Developing a compensation peer group for the Company for compensation comparison purposes is challenging because there are few pure fuel cell peer companies that are publicly-traded, stand-alone, U.S.-based and size-appropriate. Nonetheless, we strive to establish a peer group that provides appropriate compensation data for evaluating the competitiveness of our compensation program and we believe that the mix of companies in the technology and fuel cell industries that comprise our compensation peer group provides appropriate reference points for compensation and performance comparisons. However, the companies in our peer group have historically differed from the companies used as peers by some proxy advisory firms. These differences in the composition of compensation peer groups can result in substantial differences in how such firms view our compensation relative to our peers.

    Our 2020 peer group was selected based on a balance of the following criteria:

    size-appropriate companies that operate in similar industries;

    companies against which we believe we compete for executive talent; and

    public companies based in the United States whose compensation and financial data are available in proxy statements or through widely available compensation surveys.

    It is important to note that while any one individual peer company will not be fully reflective of Plug Power’s size, business model and industry, the peer group, as a whole, aims to reasonably represent Plug Power’s competitive market for executive talent, business characteristics, and business stage.

    Based on these criteria, our peer group for 2020, as approved by our Compensation Committee, was comprised of the following 22 companies:

    2020 Peer Group

    Acacia Communications, Inc.Cree, Inc.Power Integrations, Inc.
    AeroVironment, Inc.FuelCell Energy, Inc.Rogers Corp.
    Ambarella, Inc.Inphi CorporationSemtech Corp.
    Ballard Power Systems Inc.Lattice Semiconductor Corp.Silicon Laboratories, Inc.
    Bloom Energy Corp.MACOM Technology Solutions Holdings, Inc.SolarEdge Technologies, Inc.
    Brooks Automation, Inc.MaxLinear, Inc.Sunrun, Inc.
    Canadian Solar Inc.Mercury Systems, Inc.
    Chart Industries, Inc.NetScout Systems, Inc.

    Based on data compiled by Radford at the time of the peer group review, our revenues and market capitalization margin were at the 12th and 49th percentiles, respectively, in relation to the peer group.

    As an additional reference, our Compensation Committee also uses data from the Radford Global Technology executive compensation survey (the “Radford Survey”) to evaluate the competitive market generally when formulating its recommendation for the total direct compensation packages for our executive officers. The Radford Survey provides compensation market intelligence and is widely used within the technology industry.

    Due to the nature of our business, we also compete for executive talent with companies outside our peer group, including public companies that are larger and more established than we are or that possess greater resources than we do, and with smaller private companies that may be able to offer greater compensation potential.

    In setting compensation, the Compensation Committee considers each executive’s level and job performance, his duties and responsibilities at the Company compared to the duties and responsibilities of executive officers in similar positions at the peer group companies and in the survey data, other circumstances unique to the Company, and evaluates whether the compensation elements and levels provided to our executives are generally appropriate relative to their responsibilities at the Company and compensation elements and levels provided to their counterparts in the peer group or within survey data. The Compensation Committee also instructed Radfordconsiders both objective and subjective criteria to reviewevaluate Company and individual performance, which allows it to exercise informed judgment and not rely solely on rigid benchmarks. Accordingly, the public disclosureCompensation Committee does not formulaically tie compensation decisions to any particular percentile level of total compensation paid to executives at the peer group companies or survey data.

    Looking ahead to 2021—Our peer group for 2021, as approved by our peer companies concerning their executive compensation models and guidelines and compare them to our actual compensation practices.Compensation Committee, is comprised of the following 22 companies:

     

    2021 Peer Group

    AeroVironment, Inc.FuelCell Energy, Inc.Rogers Corp.
    Ambarella International, L.P.Generac Holdings Inc.Semtech Corp.
    Ballard Power Systems, Inc.Inphi Corp.Silicon Laboratories, Inc.
    Bloom Energy Corp.Lattice Semiconductor Corp.SolarEdge Technologies, Inc.
    Brooks Automation, Inc. SolutionsMACOM Technology Holdings, Inc.SunPower Corp.
    Chart Industries, Inc.MaxLinear, Inc.Sunrun Inc.
    Cree, Inc.Monolithic Power Systems, Inc.
    Enphase Energy, Inc.Power Integrations, Inc.

    Our revenues and market capitalization margin were at the 23rd and 100th percentiles, respectively, in relation to the peer companies for 2018 included the following: AeroVironment, Allied Motion Technologies, Ambarella, Ballard Power Systems, CalAmp, Clean Energy Fuels, Clearfield, DSP Group, EMCORE, FormFactor, FuelCell Energy, Harmonic, Inphi, KVH Insdustries, Maxwell Technologies, MTS Systems, Nanometrics, PAR Technology, Phototronics, Rambus, Stoneridge, and Thermon Group.group.

    Role of Stockholder Say-On-Pay VotesSay-on-Pay

            Following the resultsWe pay careful attention to any feedback we receive from our say-on-pay frequency vote conducted in connection withstockholders about our 2017executive compensation program. At our 2020 Annual Meeting of stockholders in which the highest number of votes were cast for an "annual" frequency forStockholders, we conducted our non-binding advisory vote on executive compensation, we now provide our stockholders with the opportunity to cast an annual non-binding, advisory vote on the compensation of our named executive officers, (a "say-on-pay" vote). The next say-on-pay frequencycommonly referred to as a “say-on-pay” vote, on executive compensation will occur no later than our annual meeting of stockholders in 2023.

            In accordance with Section 14Athe Dodd-Frank Wall Street Reform and Consumer Protection Act of the Exchange Act, we are providing the Company's stockholders the opportunity to vote on a non-binding, advisory resolution to approve the compensation of our named executive officers at the Annual Meeting (See Proposal 3). At our last annual meeting of stockholders held in May 2018, we asked our stockholders, through an advisory vote, to approve the compensation of our named executive officers. The advisory vote received the approval of 72%2010. Approximately 81% of the votes cast by stockholders on this proposal were cast in support of the proposal.compensation paid to our named executive officers. Although the results of the say on paysay-on-pay vote are advisory and not binding on the Company, the Board or the Compensation Committee, we value the opinions of our stockholders and take the results of the say-on-paysay-on- pay vote into account when making decisions regarding the compensation of our named executive officers. In response to the advisory vote, the Company solicited feedback from certain of our shareholders and as a result of the feedback received, we have modified our equity compensation practices to include the grant of a mix of stock options and restricted stock to our named executive officers for 2018. We continued to be receptive to input from stockholders concerning our executive compensation programs and consider any such feedback when making design adjustments to our plans.

    Our Executive Compensation ProgramsProgram

            OurThe primary components of our executive compensation primarily consists ofprogram are base salary, annual cash incentive bonuses and long-term equity incentive compensation and broad-based benefits programs.compensation. Consistent with the emphasis we place on pay-for-performance based incentive compensation,pay-for- performance, annual performance-based bonuses and long-term equity incentive compensation in the form of stock options, premium priced 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 and Board of Directors determined the specific amounts of compensation to be paid to each of our executives in 20182020 based on a number of factors, including:

      Its review of the report provided by Radford in 2018 showing the amount of compensation paid by our peer companies to their executives with similar roles

      Our executives’ and responsibilities;

      Our executives'Company performance during 20182020 in general and as measured against predeterminedpre- established performance goals;

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

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

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

    The executive's

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

    The amounts of compensation being paid to our other executives;

    The executive's

    Our executives’ contribution to our business performance and financial results;

    Our executives'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 ofand the particular element and how it fits into our overall executive compensation. Compensationcompensation paid to our named executive officers in 20182020 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 contributionssmallest component of our executives,each executive officer’s total direct compensation and our executives' performance during the prior year.

            Afterrepresent a review of 2017 base salaries,fixed amount paid to each executive for performing his or her normal duties and in consideration of the recommendations made by Radford, the annual base salaries of our named executive officers for 2018 and 2017 were as follows: Mr. Marsh—$600,000 in both 2018 and 2017; Mr. Middleton—$375,000 in both 2018 and 2017; Mr. Schmid—$391,000 in both 2018 and 2017; Mr. Conway—$335,000 in 2018 and $280,000 in 2017; and Mr. Crespo—$220,000 in both 2018 and 2017.responsibilities. Our executives'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'executives’ performance and increased experience, any changes in our executives'executives’ roles and responsibilities, and other factors. The initialfollowing table sets forth the annual base salaries that we negotiatedfor our named executive officers for each of 2019 and 2020, as well as the percentage increase year-over-year. Consistent with our executives werepay-for-performance philosophy, the increases are merit based on our understandingin recognition of the market at the time, the


    individual experiencestrong performance 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.contribution:

      Name

        2019
      Base Salary
      ($)
         2020
      Base Salary
      ($)(1)
         Increase
      (%)
          

      Andrew J. Marsh

         600,000    676,442    12.7  

      •  Mr. Marsh’s last salary increase was in 2014

      Paul B. Middleton

         375,000    387,188    3.3  

      •  Mr. Middleton’s last salary increase was in 2014

      Sanjay K, Shrestha

         306,538    338,222    10.3  

      •  Mr. Shrestha’s first salary hire in 2019 to reflect additional responsibilities in connection with leadership of our Energy Solutions Business

      Keith C. Schmid

         391,000    393,317    2.5  

      •  Mr. Schmid’s last salary increase was in 2015

      Jose Luis Crespo

         220,000    227,692    3.5  

      •  Mr. Crespo’s last salary increase was in 2014

      (1)

      The reported amounts reflect the effective annual base salaries for 2020 which are a composite of (a) base salaries in effect from January 1, 2020 to September 28, 2020, which were as follows: Andrew J. Marsh – $651,923; Paul B. Middleton – $386,250; Sanjay K. Shrestha – $325,962; Keith C. Schmid – $391,000; and Jose Luis Crespo – $226,922 and (b) base salary increases in effect from September 29, 2020 through December 31, 2020, which were as follows: Andrew J. Marsh – $750,000; Paul B. Middleton – $390,000; Sanjay K. Shrestha – $375,000; Keith C. Schmid – $400,000; and Jose Luis Crespo – $230,000.

      Annual Cash Incentive Bonuses

    Our named executive officers are eligible to receive annual cash incentive bonuses based on our pay-for-performancepay-for- performance incentive compensation program. They are eligible to receive annual incentiveAnnual bonuses primarilyfor 2020 were based upon theirCompany performance as measured against predetermined individualpre-established performance goals, including financial measures, achievement of strategic objectives, and other factors.factors as described in more detail below. The primary objective of this program is to motivate and reward our named executive officers for meeting individualCompany performance goals. We do not believegoals that every important aspect of executive performance is capable of being specifically quantified in a predetermined performance goal. For example, events outsidedrive the long-term success of our control may occur after we have establishedbusiness.

    At the named executive officers' individual performance goals forbeginning of the year that require our named executive officers(and prior to focus their attention on different or other strategic initiatives; thus, the individual performance goals may be modified duringonset of the fiscal year bypandemic), the PresidentCompensation Committee and Chief Executive Officer, or the Board 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 threshold, target and thresholdstretch attainment levels for each of our named executive officers based on a percentage of his or her base salary. For Mr. Marsh, 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 50%, 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 challengingreasonably difficult for the executive to attain, and the executive would meet expectations if he achieved this level.our expectation for baseline performance before any bonus will be paid. 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 stretch attainment level is considered exceptionally challenging for the executive to attain, and the executive would need to significantly outperform to achieve this level. The table

    below sets forth, for each named executive officer, the threshold, target and target performance attainment levels are intended to provide for correspondingly greater or lesser incentivesstretch annual bonus opportunity, both as a percentage of the named executive officer’s year-end base salary and in the event that performance is within an appropriate range above or below the target performance attainment level.dollars.

     In order to link

    Name

      2020
    Threshold
    Annual
    Bonus
    (%)
      2020
    Threshold
    Annual
    Bonus

    ($)
       2020 Target
    Annual
    Bonus

    (%)
      2020 Target
    Annual
    Bonus

    ($)
       2020
    Stretch
    Annual
    Bonus
    (%)
      2020
    Stretch
    Annual
    Bonus

    ($)
     

    Andrew J. Marsh

       65  487,500    100  750,000    135  1,012,500 

    Paul B. Middleton

       65  253,500    100  390,000    135  526,500 

    Sanjay K. Shrestha

       65  243,750    100  375,000    135  506,250 

    Keith C. Schmid

       65  260,000    100  400,000    135  540,000 

    Jose Luis Crespo

       100  230,000    200  460,000    400  920,000 

    At the beginning of each executive's performance to corporate-wide strategy,year the executives' individual performance goals directly correlate to our corporate milestones, which are recommended by managementCompensation Committee and adopted or modified by the Board after appropriate considerationselect performance metrics and review. approve Company performance goals. The executives' individual performance2020 metrics and goals are determined in the same way as the corporate milestones such that management reviews how each executive may contributewere established prior to the corporate milestones and recommends individual performance goals toonset of the Board. The Board, after appropriate consideration and review, approves or modifies the individual performance goals. For 2018, the individual performance goals, as well as the corporate milestones, included: (i) gross billings of $180 million for the threshold and $200 million for target; (ii) EBITDAS of negative $4 million for threshold and break even for target; and (iii) free cash flows of negative $12 million for threshold and negative $4 million for target. 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 onCovid-19 pandemic; however, notwithstanding the potential bonus award. For 2018,business disruption that was expected as a result of the pandemic, the goals were weighted as followsnot decreased to address the pandemic. The actual amounts of annual incentive bonuses for Messrs. Marsh, Middleton, Schmid, Crespo2020 were determined based on achievement of these pre-established corporate objectives. The 2020 Company goals approved by our Board and


    Conway: revenue—20%, adjusted EBITDA—40% Compensation Committee, the relative weightings assigned to each goal at the beginning of the year, and free cash flows—40%. Adjusted EBITDA is defined as cash flows from operations, adjustedthe performance against these Company goals for change in working capital, depreciation and interest associated with power purchase agreement financings, cash based interest expense on corporate debt, and any restructuring and other non-recurring charges. Free cash flow is defined as the sum of net cash used in operating activities, net cash used for purchase of property, plant and equipment and contruction of leased property, and cash proceeds from financing power purchase agreement deployments, but excludes principal payments associated with operating leases.2020 are set forth below.

     

    2020 Annual Incentive Goals

      Relative
    Weighting
      Actual Achievement
    for 2020
    (as a % of target)
      Weighted
    Performance
     

    Gross Billings

        

    Threshold: $230 Million

        

    Target: $310 Million

       35  126  44

    Stretch: $341 Million

        

    Adjusted Operating EBITDA

        

    Threshold: $27 Million

        

    Target: $36 Million

       35  108  38

    Stretch: $48.5 Million

        

    Key Strategic Initiatives

        

    Threshold: Three

        

    Target: Four

       30  135  40.5

    Stretch: Five

        

    2020 Company Goal Achievement

       100   122.5

    Gross Billings. Gross billings is a measure of topline performance and is based on the invoice value of equipment deployed and services rendered. Invoice value of equipment is measured on a relative basis using cash value within contracts with customers and it is attributed to the period in which the equipment is deployed. To that amount, the Company adds the invoice value for services rendered in the period. These services include fuel provided, extended warranty contracts serviced, and power provided under PPAs. The significant estimates and assumptions underlying gross billings include the allocation of revenue, excluding the provision for warrants, based on relative stand-alone selling prices used in the Company’s GAAP revenue numbers.

    Adjusted Operating EBITDA. Adjusted Operating EBITDA is a measure of operating performance based on operating income (loss), plus stock-based compensation, plus depreciation and amortization, plus right- of-use asset depreciation and interest associated with PPA financings, plus costs associated with acquisitions, restructuring and other charges.

    Rationale for Metric Adjustments. In measuring Gross Billings and Adjusted Operating EBITDA for purposes of our annual cash incentive plan, the Compensation Committee focuses on the fundamentals

    of the underlying business performance and adjusts for items that are not indicative of core performance. The purpose of these adjustments is to ensure that the measurement of performance reflects factors that management can directly control and that payout levels are not artificially inflated or impaired by factors unrelated to the core operation of the business. Accordingly, the calculation of these metrics for compensatory purposes may differ from the calculation for external financial reporting purposes.

    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 for each executive's potentialexecutive’s bonus amount based on histhe level of attainment of each of his individual performancethe Company goals (with the exception of the Chief Executive Officer himself whose level of attainment is evaluated by the Compensation Committee directly).

    The Compensation Committee determined the 2020 annual cash incentive awards for the named executive officers using the following framework:

    Base

    Salary

     C 

    Target

    Percentage

     C 

    70%

    Financial

    Performance

    Payout: 0 -

    135%

     + 

    30% Key

    Strategic

    Initiatives

    Payout: 0 -

    135%

    Extraordinary

    Personal

    Contribution

    Overall Payout

    Cap of 200%

    2020 Financial Performance Achievement. The financial performance was formulaically calculated and earned at 117% of target.

    2020 Key Strategic Initiatives. The Compensation Committee determined that five of the six pre- established strategic initiatives were achieved, resulting in achievement at 135% of target. The five strategic initiatives achieved in 2020 were:

    New multi-site customer in material handling

    Commencing development of the Rochester Innovation Center

    Launching large scale green hydrogen platform

    Establishing pilot program with three large fuel cell electric vehicles’ customers

    Establishing a strategic relationship with a large original equipment manufacturer/fuel provider

    2020 Personal Contribution. While the financial and strategic achievements noted above are impressive, it is even more so given that it was accomplished in the face of the uncertainty and business disruption caused by the Covid-19 pandemic. In addition to driving the business forward with numerous other successful initiatives (see discussion under “Executive Summary—2020 Business and Strategic Highlights”), the management team worked tirelessly to ensure that the Company addressed the special needs of our employees, our customers and our communities during this period. After discussion and consideration, the Compensation Committee determined that it would be appropriate to recognize and reward the named executive officers for their extraordinary contribution during 2020.

    The Board, after review and discussion and recommendation from the Compensation Committee, determinesdetermined the final level of attainment for each executive's individualof the performance goals.

    goals and the amount of each executive’s annual incentive bonus. The actual cash incentive bonus amounts paid to our named executive officers with respect to performance in 2020 as well as the actual cash incentive bonus amounts as a percentage of target are set forth in the table below. In 2018, Mr. Marsh earned aaddition, as all our employees participated in the same annual 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 $220,000, or 100% of his annual base salary. Mr. Conway earned a bonus of $125,625, or 37.5% of his annual base salary. Annual bonus awards earned byprogram as the named executive officers, all employees similarly earned a 200% bonus payout in 2018 are reflected in the Non-Equity Incentive Plan Compensation columnrecognition of the "Summary Compensation Table".their extraordinary contributions during 2020.

     For 2019, the individual performance goals for threshold level for Messrs. Marsh, Middleton, Schmid, Crespo, and Conway include: (i) gross billings of $230 million; (ii) adjusted EBITDA of break even; and (iii) a booking related to a fuel cell mobile application other than material handling.

            We grantHistorically, we have granted long-term equity incentive awards in the form of stock options and restricted stock to executives as part of our total compensation package. In 2020, we chose to use a combination of stock options, premium priced stock options, and restricted stock. 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'sCompany’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 asfor our long- termlong-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 beenare 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 adoptedStock option awards and premium priced 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 Common Stock at a fixed exercise price typically for a period of up to ten years, subject to continued employment with our Company.years. 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- thirdone-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 continued service to the Company and acceleration in certain circumstances. Stock option awards are made pursuant to our SecondThird Amended and Restated 2011 Stock Option and Incentive Plan.Plan (the “2011 Plan”). Except as may otherwise be provided in the applicable stock option award agreement, stock option awards become fully exercisable upon a change“change of control.control” (as defined in the 2011 Plan). The exercise price of each stock option is equal to, or, in the case of premium priced stock options, in excess of, the closing price of 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 toRestricted stock awards provide our executive officers are approved bywith a long-term incentive alternative to the Compensation Committee. stock option awards. Restricted stock awards generally vest in equal annual installments over three years from the date of grant, subject to continued employment with the Company.

    We consider a number of factors in determining the number of shares subject to stock options and the number of shares of restricted stock, 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 and the number of shares subject to unvested restricted stock awards held by our named executive officers;

    the vesting schedule of the unvested stock options and restricted stock awards 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.

    The table below sets forth information regarding stock options and premium priced stock options (reflecting a 17.5% premium above the grant date exercise price) granted to our named executive officers in 2020:

     Restricted

    Name

      Number of
    Shares Subject
    to Premium
    Priced Stock
    Options (#)
       Exercise
    Price Per Share of
    17.5% Premium
    Priced Stock
    Options ($)
       Number of
    Shares Subject
    to Non-
    Premium
    Priced Stock
    Options) (#)
       Exercise Price
    Per Share of
    Non-Premium
    Priced Stock
    Options ($)
     

    Andrew J. Marsh

       275,000    15.51    275,000    13.20 

    Paul B. Middleton

       100,000    15.51    100,000    13.20 

    Sanjay K. Shrestha

       112,500    15.51    112,500    13.20 

    Keith C. Schmid

       100,000    15.51    100,000    13.20 

    Jose Luis Crespo

       —      —      175,000    13.20 

    The table below sets forth information regarding restricted stock awards providegranted to our named 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.in 2020:

     In March 2019, in response to comments provided by a proxy advisory firm, the Board approved an amendment to our Second Amended and Restated 2011 Stock Option and Incentive Plan to require a minimum vesting period of one year required for all equity awards, other than a limited number of excepted awards. The Board also approved the adoption of a Policy for Recoupment of Incentive Compensation, or "clawback" policy as discussed below. Both the adoption of a minimum vesting requirement under our equity plan and a clawback policy serve to further promote our pay-for-performance philosophy.

      NameNumber of
      Restricted
      Shares (#)

      Andrew J. Marsh

      550,000

      Paul B. Middleton

      200,000

      Sanjay K. Shrestha

      225,000

      Keith C. Schmid

      200,000

      Jose Luis Crespo

      175,000

      Broad-Based Benefits

    All full-time employees, including our named executive officers, mayare eligible to 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.plan on the same basis as other employees.

      Currently, we do not view perquisites or other personal benefits as a significant component of our executive compensation program. Accordingly, we do not provide perquisites to our named executive officers, except in situations where we believe it is appropriate to assist an individual in the performance of his duties, to make him more efficient and effective, and for recruitment and retention purposes.

      Employment Agreements

      The named executive officers are subject to employment agreements that provide for severance benefits upon certain qualifying terminations of employment with the Company. The Compensation Committee considers these severance benefits to be an important part of the executive compensation program and consistent with competitive market practice. Consistent with market practices, the employment agreements do not include change in control-related tax gross-ups. Additional information regarding the employment arrangements with each of our named executive officers, including a quantification of benefits that would have been received by each named executive officer had his employment terminated on December 31, 2020, is provided under “Employment Agreements” and “Potential Payments upon Termination or Change in Control.”

    Relationship of Executive Compensation to Risk

    The Compensation Committee considers whether the design of the Company'sCompany’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 Company'sCompany’s incentive compensation program, and the implementation of other administrative features designed to mitigate risk such as vesting requirements, and stock ownership


    guidelines and our clawback policy, each as described above.in this Compensation Discussion and Analysis. Based on its review, the Compensation Committee believes that the Company'sCompany’s executive compensation program is aligned to the interests of stockholders, appropriately rewards pay for performance, and does not promote unnecessary andor excessive risk.

      Stock Ownership Guidelines

      The Board has adopted stock ownership guidelines for executives, including our 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 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 are included in determining compliance with the stock ownership guidelines: (i) shares owned outright by the executive or his 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 33%; 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.

      Prohibition Against Hedging

      The Company maintains an internal “Insider Trading Policy” that is applicable to our executive officers and directors. Among other things, the policy prohibits any employee of the Company (including directors or executive officers) from (i) engaging in short sales of the Company’s securities and from trading in puts, calls or options in respect of the Company’s securities, (ii) buying or selling puts, calls or other derivative securities of the Company or engaging in any other hedging transactions with respect to the Company’s securities or (iii) purchasing any securities of the Company with money borrowed from a bank, brokerage firm or other person for the purchase of purchasing securities or using the Company’s securities as collateral in a margin account.

      Clawback Policy

    In March 2019, our Compensation Committee and Board of Directors adopted a Policy for Recoupment of Incentive Compensation that covers incentive compensation paid to our executive officers who are subject to the reporting requirements of Section 16 of the Securities Exchange Act of 1934, as amended.Act. The policy provides that if we are required to prepare an accounting restatement due to our material non-compliance with any financial reporting requirement and/or intentional misconduct by a covered executive, our Compensation Committee may require the covered executive to repay to us any excess compensation received by the covered executive during the covered period. For purposes of this policy, excess compensation means any annual cash bonus and long termlong-term equity incentive compensation received by a covered executive during the three-year period preceding the publication of the restated financial statement that the Independent DirectorCompensation Committee determines was in excess of the amount that such covered executive would have received had such annual cash bonus and long termlong-term equity incentive compensation been calculated based on the financial results reported in the restated financial statement.

    OurTax and Accounting Considerations

    Deductibility of Executive Compensation Process

    Generally, Section 162(m) of the Internal Revenue Code of 1986, as amended (the “Code”), disallows a federal income tax deduction for public corporations of remuneration in excess of $1 million paid in any fiscal year to certain specified executive officers. For taxable years beginning before January 1, 2018 (i) these executive officers consisted of a public corporation’s principal executive officer and up to three other executive officers (other than the principal financial officer) whose compensation is required to be disclosed to stockholders under the Exchange Act, because they are the corporation’s most highly- compensated executive officers and (ii) qualifying “performance-based compensation” was not subject to this deduction limit if specified requirements were met.

    Pursuant to the Tax Cuts and Jobs Act of 2017, for taxable years beginning after December 31, 2017, the remuneration of a public corporation’s principal financial officer is also subject to the deduction limit. In addition, subject to certain transition rules (which apply to remuneration provided pursuant to written binding contracts which were in effect on November 2, 2017 and which are not subsequently materially modified), for taxable years beginning after December 31, 2017, the exemption from the deduction limit for “performance-based compensation” is no longer available. Consequently, for fiscal years beginning after December 31, 2017, all remuneration in excess of $1 million paid to a specified executive will not be deductible.

    In designing our executive compensation program and determining the compensation of our executive officers, including our named executive officers, the Compensation Committee considers a variety of factors, including the potential impact of the Section 162(m) deduction limit. However, the Compensation Committee will not necessarily limit executive compensation to that which is or may be deductible under Section 162(m) of the Code. The Compensation Committee will consider various alternatives to preserving the deductibility of compensation payments and benefits to the extent consistent with its compensation goals. The Compensation Committee believes that our stockholders’ interests are best served if its discretion and flexibility in awarding compensation is not restricted, even though some compensation awards may result in non-deductible compensation expense.

    Taxation of “Parachute” Payments

    Sections 280G and 4999 of the Code provide that executive officers and directors who hold significant equity interests and certain other service providers may be subject to significant additional taxes if they receive payments or benefits in connection with a change in control of the Company that exceed certain prescribed limits, and that the Company (or a successor) may forfeit a deduction on the amounts subject to this additional tax. We have not agreed to provide any executive officer, including any named executive officers, or director with a “gross- up” or other reimbursement payment for any tax liability that the executive officer or director might owe as a result of the application of Sections 280G or 4999 of the Code.

    Section 409A of the Internal Revenue Code

    Section 409A of the Code imposes additional significant taxes in the event that an executive officer, director or service provider receives “deferred compensation” that does not satisfy the requirements of Section 409A of the Code. Although we do not maintain a nonqualified deferred compensation plan, Section 409A of the Code may apply to certain severance arrangements, bonus arrangements and equity awards. We aim to structure all our severance arrangements, bonus arrangements and equity awards in a manner to either avoid the application of Section 409A or, to the extent doing so is not possible, to comply with the applicable requirements of Section 409A of the Code.

    Accounting for Stock-Based Compensation

    We follow FASB ASC Topic 718 for our stock-based compensation awards. FASB ASC Topic 718 requires us to measure the compensation expense for all share-based payment awards made to our employees and non- employee members of our Board, including options to purchase shares of our Common Stock and other stock awards, based on the grant date “fair value” of these awards. This calculation is responsibleperformed 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 definedaccounting purposes and reported in the applicable NASDAQ rules. In determining executive compensation our Compensation Committee annually reviewstables required by the performance of our executives with our Chief Executive Officer, and our Chief Executive Officer makes recommendations to our Compensation Committee with respect tofederal securities laws, even though the appropriate base salary, annual incentive bonuses and performance measures, and grants of long-term equity incentive awards for each of our executives. The Chairmanrecipient 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. The Board ultimately approves executive compensation.awards may never realize any value from their awards.

            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 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 following Report of the Compensation Committee of the Board of Directors on Executive Compensation will not be deemed incorporated by reference by any general statement incorporating by reference this Proxy StatementForm 10-K into any of the Company'sCompany’s filings under the Securities Act of 1933, as amended, or the Securities Exchange Act, of 1934, as amended, except to the extent that the Company specifically incorporates this information by reference, and will not otherwise be deemed filed under such Acts.

    The Compensation Committee reviews and evaluates individual executive officers and recommends or determines the compensation for each executive officer (See "Executive Compensation").officer. The Compensation Committee also oversees management'smanagement’s decisions concerning the performance and compensation of other Company officers, administers the Company'sCompany’s incentive compensation and other stock-based


    plans, evaluates the effectiveness of its overall compensation programs, including oversight of the Company'sCompany’s benefit, perquisite and employee equity programs, and reviews the Company'sCompany’s management succession plans. A more complete description of the Compensation Committee'sCommittee’s functions is set forth in the Compensation Committee'sCommittee’s charter which is published on the "Investors"“Investors” section of the Company'sCompany’s website atwww.plugpower.com. Each member of the Compensation Committee is an independent director as defined in the NASDAQ Rules.

    In general, the Board and the Compensation Committee designsdesign compensation to attract, retain and motivate a superior executive team, reward individual performance, relate compensation to Company goals and objectives and align the interests of the executive officers with those of the Company'sCompany’s stockholders. WeThe Board and the Compensation Committee rely upon ourtheir judgment about each individual—and not on rigid guidelines or formulas, or short-term changes in business performance—in determining the amount and mix of compensation elements for each senior executive officer. Key factors affecting oursuch judgments include: the executive'sexecutive’s performance compared to the goals and objectives established for the executive at the beginning of the year; the nature, scope and level of the executive'sexecutive’s responsibilities; the executive'sexecutive’s contribution to the Company'sCompany’s financial results; the executive'sexecutive’s effectiveness in leading the Company'sCompany’s initiatives to increase customer value, productivity and revenue growth; and the executive'sexecutive’s contribution to the Company'sCompany’s commitment to corporate responsibility, including the executive'sexecutive’s success in creating a culture of unyielding integrity and compliance with applicable law and the Company'sCompany’s ethics policies.

    The Compensation Committee has reviewed the Compensation“Compensation Discussion and AnalysisAnalysis” and discussed that analysis with Management.management. Based on its review and discussions with Management,management, the Compensation Committee recommended to our Board of Directors that the Compensation“Compensation Discussion and AnalysisAnalysis” be included in the Company'sCompany’s Annual Report on Form 10-K for the fiscal year ended December 31, 20182020 and the Company's proxy statementCompany’s Proxy Statement relating to the Company's 2019 annual meetingCompany’s 2021 Annual Meeting of stockholders.Stockholders. 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

    Johannes M. Roth

    Compensation Committee Interlocks and Insider Participation

    During 2018,2020, Messrs. Willis (Chairman), McNamee, Roth and HickeyRoth served as members of the Compensation Committee. None of themthe members of our Compensation Committee was an employee or officer of the Company during 2020, a former officer of the Company, or had any relationshipother relationships with the Companyus requiring disclosure under applicable rules and regulationsherein. None of our executive officers currently serves or has served as a director or member of the SEC.


    compensation committee (or other committee serving an equivalent function) of any other entity whose executive officers served as one of our directors or a member of the Compensation Committee.

    2020 Summary Compensation Table

    The following table sets forth information concerningthe total compensation for services rendered in all capacities awarded to, earned by orand paid induring the last three fiscal years to the Company's named executive officers.

    Name and Principal Position
     Year Salary
    ($)
     Stock
    Awards
    ($)(1)
     Option
    Awards
    ($)(2)
     Non-Equity
    Incentive Plan
    Compensation
    ($)(3)
     All Other
    Compensation
    ($)
     Total
    ($)
     

    Andrew J. Marsh

      2018  600,000  980,000  775,000  300,000  14,350(4) 2,669,350 

    President, Chief Executive

      2017  600,000    2,366,000  150,000  14,100(4) 3,130,100 

    Officer and Director

      2016  600,000    1,303,125  300,000  13,750(4) 2,216,875 

    Paul B. Middleton

      
    2018
      
    375,000
      
    392,000
      
    310,000
      
    187,500
      
    14,350

    (5)
     
    1,278,850
     

    Chief Financial Officer and

      2017  375,000    929,500  93,750  14,100(5) 1,412,350 

    Senior Vice President

      2016  375,000    417,000  187,500  13,750(5) 993,250 

    Jose Luis Crespo

      
    2018
      
    220,000
      
    392,000
      
    310,000
      
    220,000
      
    14,350

    (6)
     
    1,156,350
     

    Vice President-Global

      2017  220,000    549,250  220,000  14,100(6) 1,003,350 

    Sales

      2016  220,000    278,000  440,000  13,750(6) 951,750 

    Keith Schmid

      
    2018
      
    391,000
      
    490,000
      
    387,500
      
    195,500
      
    14,350

    (7)
     
    1,478,350
     

    Chief Operating Officer and

      2017  391,000    1,098,500  97,750  14,100(7) 1,601,350 

    Senior Vice President

      2016  391,000    347,500  195,500  13,750(7) 947,750 

    Gerard L. Conway, Jr. 

      
    2018
      
    301,154
      
    392,000
      
    310,000
      
    125,625
      
    14,350

    (8)
     
    1,143,129
     

    General Counsel, Corporate

      2017  280,000    549,250  52,500  14,100(8) 895,850 

    Secretary and Senior Vice

      2016  280,000    208,500  105,000  13,750(8) 607,250 

    President

                          

    (1)
    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 stock on the date of grant. For additional information on stock awards, refer to note 15 of the Company's consolidated financial statements in the Form 10-Kindicated for the year ended December 31, 2018, 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.

    (2)
    This column represents the aggregate grant date fair value of 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 on the valuation assumptions with respect to option awards, refer to note 15 of the Company's consolidated financial statements in our Form 10-K for the year ended December 31, 2018, as filed with the SEC. These amounts reflect the Company's accounting expense, excluding the impact of estimated forfeitures, for these awards, and do not correspond to the actual value that will be recognized by the named executives.

    (3)
    This column represents the dollar amount of bonuses earned by executives under our non-equity incentive plan.

    (4)
    Includes the Company's share of contributions on behalf of Mr. Marsh to the Plug Power 401(k) savings plan in the amount of $13,750, $13,500 and $13,250, in the years ended 2018, 2017 and 2016, respectively, and payments of $600, $600, and $500 for life insurance premiums in each of the years ended December 31, 2018, 2017 and 2016, respectively.
    our named executive:

    Name and Principal Position

      Year Salary
    ($)
     Bonus
    ($)(1)
     Stock Awards
    ($)(2)
     Option
    Awards
    ($)(3)
     Non-Equity
    Incentive Plan
    Compensation
    ($)(4)
     All Other
    Compensation
    ($)
     Total ($)

    Andrew J. Marsh

                     

    President, Chief Executive Officer and Director

        2020   676,442   581,250   7,260,000   4,178,075(5)    918,750   15,555(6)(7)    13,630,072
        2019   600,000   —     1,449,500   999,700(8)    631,200   15,170   3,695,570
        2018   600,000   —     980,000   775,000   300,000   14,920   2,669,920

    Paul B. Middleton

                     

    Chief Financial Officer and Senior Vice President

        2020   387,188   302,250   2,640,000   1,519,300(9)    477,750   15,555(6)(7)    5,342,043
        2019   375,000   —     557,500   384,500(10)    394,500   15,170   1,726,670
        2018   375,000   —     392,000   310,000   187,500   14,920   1,279,420

    Sanjay K. Shrestha

                     

    Chief Strategy Officer

        2020   338,222   290,625   2,970,000   1,709,213(11)    459,375   15,361(6)(12)    5,782,796
        2019(13)    306,538   —     346,500   249,150   300,000   9,033   1,211,221

    Keith C. Schmid

                     

    Chief Operating Officer and Senior Vice President

        2020   393,317   310,000   2,640,000   1,519,300(9)    490,000   15,555(6)(7)    5,368,172
        2019   391,000   —     557,500   384,500(10)    411,332   15,170   1,759,502
        2018   391,000   —     490,000   387,500   195,500   14,920   1,478,920

    Jose Luis Crespo

                     

    Vice President-Global Sales

        2020   227,692   356,501   2,310,000   1,368,150   563,500   15,026(6)(14)    4,840,869
        2019   220,000   —     446,000   307,600(5)    505,340   14,668   1,493,608
        2018   220,000   —     392,000   310,000   220,000   14,691   1,156,691

    (1)

    As discussed in greater detail in the “Compensation Discussion and Analysis,” while the Company’s 2020 financial and strategic achievements were impressive, it was even more so given that it was accomplished in the face of the uncertainty and business disruption caused by the Covid-19 pandemic. In addition to driving the business forward with numerous other successful initiatives (see discussion under “Executive Summary—2020 Business and Strategic Highlights”), the management team worked tirelessly to ensure that the Company addressed the special needs of our employees, our customers and our communities during this period. After discussion and consideration, the Compensation Committee determined that it would be appropriate to recognize and reward all our employees (including the named executive officers) for their extraordinary commitment and contribution to the Company by paying an additional cash bonus equal to 77.5% of the relevant target bonus.

    (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 stock on the date of grant. For additional information on stock awards, refer to note 18 of the Company’s consolidated financial statements in this Annual Report on Form 10-K. 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 our named executive officers.

    (3)

    This column represents the aggregate grant date fair value of 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 on the valuation assumptions with respect to option awards, refer to note 18 of the Company’s consolidated financial statements in this Annual Report on Form 10-K. These amounts reflect the Company’s accounting expense, excluding the impact of estimated forfeitures, for these awards, and do not correspond to the actual value that will be recognized by our named executive officers.


    (5)
    Includes the Company's share of contributions on behalf of Mr. Middleton to the Plug Power 401(k) savings plan in the amount of $13,750, 13,500 and $13,250 in the years ended December 31, 2018, 2017 and 2016, respectively, payment of $600, $600 and $500 for life insurance premiums in the years ended December 31, 2018, 2017 and 2016, respectively.

    (6)
    Includes the Company's share of contributions on behalf of Mr. Crespo to the Plug Power 401(k) savings plan in the amount of $13,750, $13,500, and 13,250 in the years ended December 31,2018, 2017 and 2016, respectively, and payment of $600, $600 and $500 for life insurance in the years ended December 31, 2018, 2017 and 2016, respectively.

    (7)
    Includes the Company's share of contributions on behalf of Mr. Schmid to the Plug Power 401(k) savings plan in the amount of $13,750, $13,500, and $13,250, in the years ended December 31, 2018, 2017, and 2016, respectively, and payment of $600, $600, and $500, for life insurance premiums for the years ended December 31, 2018, 2017, and 2016, respectively.

    (8)
    Includes the Company's share of contributions on behalf of Mr. Conway to the Plug Power 401(k) savings plan in the amount of $13,750, $13,500 and $13,250 in the years ended December 31, 2018, 2017 and 2016, respectively, payments of $600, $600, and $500 for life insurance premiums in each of the years ended December 31, 2018, 2017, and 2016, respectively.
    (4)

    This column represents the amount of bonuses earned by executives under our annual cash incentive plan. As discussed in the “Compensation Discussion and Analysis,” the metrics and goals for 2020 were established prior to the onset of the COVID-19 pandemic; however, notwithstanding the potential business disruption that was expected as a result of the pandemic, the goals were not decreased to address the pandemic.

    (5)

    Includes a premium priced stock option with a grant date fair value of $2,028,125.

    (6)

    Includes the Company’s share of contributions on behalf of each of Messrs. Marsh, Middleton, Shrestha, Schmid and Crespo to the Plug Power 401(k) savings plan in the amount of $14,250 in 2020.

    (7)

    Includes the Company’s share of contributions on behalf of Messrs. Marsh, Middleton and Schmid in the amount of $1,305 for life insurance premiums in 2020.

    (8)

    Includes a premium priced stock option with a grant date fair value of $490,750.

    (9)

    Includes a premium priced stock option with a grant date fair value of $737,500.

    (10)

    Includes a premium priced stock option with a grant date fair value of $188,750.

    (11)

    Includes a premium priced stock option with a grant date fair value of $829,688.

    (12)

    Includes the Company’s share of contributions on behalf of Mr. Shrestha in the amount of $1,111 for life insurance premiums in 2020.

    (13)

    Mr. Shrestha joined the Company as a Chief Strategy Officer on April 15, 2019.

    (14)

    Includes the Company’s share of contributions on behalf of Mr. Crespo in the amount of $776 for life insurance premiums in 2020.

    Pay Ratio Disclosure Rule.

    Pursuant to a mandate of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act"“Dodd- Frank Act”), the SEC adopted a rule requiring annual disclosure of the ratio of the median employee'semployee’s annual total compensation to the total annual compensation of the principal executive officer ("PEO"(“PEO”). The PEO of our Company is Mr. Marsh.

    We believe that our compensation philosophy must be consistent and internally equitable to motivate our employees to create shareholder value. The purpose of the new required disclosure is to provide a measure of the equitability of pay within the organization. We are committed to internal pay equity, and our Compensation Committee monitors the relationship between the pay our PEO receives and the pay our non-executive employees receive.

    For 2018,2020, the annual total compensation of Mr. Marsh, our PEO, of $2,669,650$13,630,072 as shown in the Summary Compensation Table above, was approximately 44203 times the annual total compensation of $61,297$67,062 of athe median employee calculated in the same manner. We identified the median employee using the amount reported as compensation on the employee'semployee’s Form W-2 for the year ended December 31, 20172020 for all individuals who were employed by us on December 31, 2017,2020, the last day of our payroll year (whether employed on a full-time, part-time, or seasonal basis).

    Grants of Plan-Based Awards

     
      
      
      
     All Other
    Stock
    Awards:
    Number of
    Shares or
    Stock
    Units(#)(1)
     All Other
    Option
    Awards:
    Number of
    Securities
    Underlying
    Options (#)(2)
      
      
     
     
     Estimated future payouts
    under non-equity
    incentive plan awards
      
      
     Grant Date
    Fair Value
    of stock
    and option
    Awards(4)
     
     
      
     Exercise or
    Base Price
    of Option
    Awards ($/Sh)(3)
     
    Name
     Threshold ($) Target ($) Grant Date 

    Andrew Marsh

      600,000  600,000  08/28/18  500,000  500,000  1.96 $1,755,000 

    Paul B. Middleton

      243,750  375,000  08/28/18  200,000  200,000  1.96  702,000 

    Jose Luis Crespo

      220,000  440,000  08/28/18  200,000  200,000  1.96  702,000 

    Keith Schmid

      254,150  391,000  08/28/18  250,000  250,000  1.96  877,500 

    Gerard L. Conway, Jr

      167,500  251,250  08/28/18  200,000  200,000  1.96  702,000 

    (1)
    This column shows

    The following table sets forth information concerning the numbergrants of restricted shares granted in 2018plan-based awards to the Company’s named executive. The restrictions lapse ratably in three equal annual installments, beginning one year from the date of grant.


    (2)
    This column shows the number of stock options granted in 2018 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.

    (3)
    This column shows the per share exercise price for the stock options granted, which was the closing price of our Common Stock on the date of grant.

    (4)
    This column represents the aggregate grant date fair value of the stock awards and option awards computed in accordance with FASB 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 15 of the Company's consolidated financial statements in our Form 10-K forexecutive officers during the year ended December 31, 2018, 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.
    2020.

        

     

    Estimated Future Payouts
    Under Non-Equity
    Incentive Plan Awards(2)

     All Other
    Stock
    Awards:
    Number of
    Shares or
    Stock
    Units(#)(3)
     All Other
    Option
    Awards:
    Number of
    Securities
    Underlying
    Options (#)(4)
     Exercise or
    Base Price of
    Option
    Awards

    ($/Sh)(5)
     Grant Date
    Fair Value
    of Stock
    and Option
    Awards(6)($)

    Name

     Grant Date(1) Threshold
    ($)
     Target ($)

    Andrew J. Marsh

       —     487,500   750,000        
       09/28/20   —     —     550,000   —       7,260,000
       09/28/20   —     —     —     275,000   13.20   2,149,950
       09/28/20   —     —     —     275,000(7)    15.51   2,028,125

    Paul B. Middleton

         253,500   390,000   —        
       09/28/20   —     —     200,000   —       2,640,000
       09/28/20   —     —     —     100,000   13.20   781,800
       09/28/20   —     —     —     100,000(7)    15.51   737,500

    Sanjay K. Shrestha

       —     243,750   375,000        
       09/28/20   —     —     225,000   —       2,970,000
       09/28/20   —     —     —     112,500   13.20   879,525
       09/28/20   —     —     —     112,500(7)    15.51   829,688

    Keith C. Schmid

       —     260,000   400,000        
       09/28/20   —     —     200,000   —       2,640,000
       09/28/20   —     —     —     100,000   13.20   781,800
       09/28/20   —     —     —     100,000(7)    15.51   737,500

    Jose Luis Crespo

       —     230,000   460,000        
       09/28/20   —     —     175,000   —       2,310,000
       09/28/20   —     —     —     175,000   13.20   1,368,150
       09/28/20   —     —     —        

    (1)

    Each grant was approved by our Compensation Committee on the grant date indicated.

    (2)

    The amounts reported represent the threshold and target amounts of potential cash payouts under our annual incentive bonus program. The actual amounts paid for Fiscal 2020 are disclosed in the “Non- Equity Incentive Plan Compensation” column of the 2020 Summary Compensation Table above.

    (3)

    This column shows the number of restricted shares granted in 2020 to our named executive officers. The restrictions lapse ratably in three equal annual installments, beginning one year from the date of grant, subject to the executive’s continued service to us through the applicable vesting date.

    (4)

    This column shows the number of shares subject to stock options granted in 2020 to our named executive officers. These options vest and become exercisable ratably in three equal annual installments, beginning one year from the date of grant, subject to the executive’s continued service to us through the applicable vesting date.

    (5)

    This column shows the per share exercise price for the stock options granted.

    (6)

    This column represents the aggregate grant date fair value of the stock awards and option awards computed in accordance with FASB 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 18 of the Company’s consolidated financial statements in this Annual Report on Form 10-K. 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 our named executive officers.

    (7)

    These represent premium priced stock options with exercise prices approximately 17.5% greater than the closing price of our Common Stock on the date of grant.

    Outstanding Equity Awards at Fiscal Year-End

    The following table provides information on the holdings of stock and option awards by theour named executive officers as of December 31, 2018.2020. There were no other stock or option awards held by theour named executive


    officers as of December 31, 2018.2020. For additional information about the awards, see the description of equity incentive compensation in the section titled "Compensation“Compensation Discussion and Analysis."

          Option Awards(1)(2)        Stock Awards(1)(2)

    Name

      Grant Date  Number of
    Securities
    Underlying
    Unexercised
    Options (#)
    Exercisable
      Number of
    Securities
    Underlying
    Unexercised
    Options (#)
    Unexercisable
      Option
    Exercise
    Price ($)
      Option
    Expiration
    Date
      Number of
    Shares or
    Units of Stock
    That Have
    Not Vested(#)
      Market
    Value of
    Shares or
    Units of
    Stock That
    Have Not
    Vested($)(3)

    Andrew J. Marsh

        4/13/11    106,600    —      6.10    4/13/21    —      —  
        8/31/17    466,668    —      2.14    8/31/27    —      —  
        8/28/18    —      166,667    1.96    8/28/28    —      —  
        8/28/18    —      —      —      —      166,667    5,651,678
        8/19/19    —      216,667    2.23    8/19/29    —      —  
        8/19/19    —      —      —      —      433,333    14,694,322
        8/19/19    —      216,667    2.62    8/19/29    —      —  
        9/28/20    —      275,000    13.20    9/28/30    —      —  
        9/28/20    —      —      —      —      550,000    18,650,500
        9/28/20    —      275,000    15.51    9/28/30    —      —  

    Paul B. Middleton

        8/28/18    —      66,667    1.96    8/28/28    —      —  
        8/28/18    —      —      —      —      66,667    2,260,678
        8/19/19    —      83,333    2.23    8/19/29    —      —  
        8/19/19    —      —      —      —      166,667    5,651,678
        8/19/19    —      83,333    2.62    8/19/29    —      —  
        9/28/20    —      100,000    13.20    9/28/30    —      —  
        9/28/20    —      —      —      —      200,000    6,782,000
        9/28/20    —      100,000    15.51    9/28/30    —      —  

    Sanjay K. Shrestha

        5/9/19    —      100,000    2.31    5/09/29    —      —  
        5/9/19    —      —      —      —      100,000    3,391,000
        9/28/20    —      112,500    13.20    9/28/30    —      —  
        9/28/20    —      —      —      —      225,000    7,629,750
        9/28/20    —      112,500    15.51    9/28/30    —      —  

    Keith C. Schmid

        10/23/13    100,000    —      0.57    10/23/23    —      —  
        8/28/18    1    83,333    1.96    8/28/28    —      —  
        8/28/18    —      —      —      —      83,333    2,825,822
        8/19/19    41,667    83,333    2.23    8/19/29    —      —  
        8/19/19    —      —      —      —      166,667    5,651,678
        8/19/19    41,667    83,333    2.62    8/19/29    —      —  
        9/28/20    —      100,000    13.20    9/28/30    —      —  
        9/28/20    —      —      —      —      200,000    6,782,000
        9/28/20    —      100,000    15.51    9/28/30    —      —  

    Jose Luis Crespo

        8/28/18    1    66,667    1.96    8/28/28    —      —  
        8/28/18    —      —      —      —      66,667    2,260,678
        8/19/19    —      66,667    2.23    8/19/29    —      —  
        8/19/19    —      —      —      —      133,333    4,521,322
        8/19/19    —      66,667    2.62    8/19/29    —      —  
        9/28/20    —      175,000    13.20    9/28/30    —      —  
        9/28/20    —      —      —      —      175,000    5,934,250

     
     Option Awards Stock Awards 
    Name
     Number of
    Securities
    Underlying
    Unexercised
    Options
    Exercisable(1)
     Number of
    Securities
    Underlying
    Unexercised
    Options
    Unexercisable(2)
     Option
    Exercise
    Price
     Option
    Expiration
    Date
     Number of
    Shares of Stock That
    Have Not Vested
     Market Value of
    Shares of Stock
    That Have Not
    Vested(3)
     

    Andrew Marsh

      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     

      1,000,000    5.39  7/24/24     

      750,000    2.43  7/23/25     

      625,000  312,500  1.72  8/9/26     

      466,667  933,333  2.14  8/31/27     

        500,000  1.96  8/28/28  500,000  620,000 

    Paul B. Middleton

      250,000    3.54  12/1/24     

      250,000    2.43  7/23/25     

      200,000  100,000  1.72  8/9/26     

      183,333  366,667  2.14  8/31/27     

        200,000  1.96  8/28/28  200,000  248,000 

    Keith Schmid

      400,000    0.57  10/23/23     

      400,000    5.39  7/24/24     

      250,000    2.43  7/23/25     

      166,667  83,333  1.72  8/9/26     

      216,667  433,333  2.14  8/31/27     

        250,000  1.96  8/28/28  250,000  310,000 

    Gerard L. Conway, Jr. 

      250    9.50  5/20/19     

      41,000    6.10  4/13/21     

      16,666    2.17  12/13/21     

      33,333    0.37  7/24/23     

      250,000    5.39  7/24/24     

      200,000    2.43  7/23/25     

      100,000  50,000  1.72  8/9/26     

      108,333  216,667  2.14  8/31/27     

        200,000  1.96  8/28/28  200,000  248,000 

    Jose Luis Crespo

      200,000    4.41  2/26/24     

      50,000    5.39  7/24/24     

      250,000    2.43  7/23/25     

      133,333  66,667  1.72  8/9/26     

      108,333  216,667  2.14  8/31/27     

        200,000  1.96  8/28/28  200,000  248,000 

    (1)
    This column represents the number of options that have vested as of December 31, 2018.

    (2)
    This column represents the number of options that have not vested as of December 31, 2018.

    (3)
    This column represents the market value of the unvested restricted stock awards using the stock price at the end of fiscal year 2018.

    Option Exercises

    (1)

    All equity awards were granted pursuant to our 2011 Plan.

    (2)

    Each equity award vests over a three year period with one-third (1/3) of the shares subject to the award vesting on each of the first three anniversaries of the grant date, subject to the executive’s continued service to us through each applicable vesting date.

    (3)

    This column represents the market value of the unvested restricted stock awards calculated based on the closing price of our Common Stock ($33.91) on December 31, 2020, the last business date of Fiscal 2020.

    Options Exercised and Stock Vested

    The following table sets forth information with respect to each of theour named executive officers that exercised stock options or vested in restricted stock during the year ended December 31, 2018.2020.


    Option Exercises and Stock Vested—2018

     
     Option awards Stock awards 
    Name
     Number of
    shares
    acquired on
    exercise
     Value
    realized on
    exercise ($)(1)
     Number of
    shares
    acquired on
    vesting
     Value
    realized
    on vesting
     

    Gerard L. Conway, Jr. 

      100,000  149,000     

    (1)
    Amounts disclosed in this column were calculated based on the fair market value of the shares on the date of exercise less the cost of exercising.
       Option Awards   Stock Awards 

    Name

      Number of
    Shares Acquired
    on Exercise
       Value Realized
    on Exercise(1)($)
       Number of
    Shares Acquired
    on Vesting
       Value Realized
    on Vesting(1)($)
     

    Andrew J. Marsh

       4,570,831    34,704,898    383,333    5,135,829 

    Paul B. Middleton

       1,566,667    26,878,515    149,999    2,008,820 

    Sanjay K. Shrestha

       50,000    467,618    50,000    215,500 

    Keith C. Schmid

       2,016,666    36,728,171    166,667    2,226,671 

    Jose Luis Crespo

       1,224,998    13,861,700    133,333    1,781,329 

    (1)

    The value realized on exercise is equal to the difference between the closing price of the stock on the exercise date less the per share exercise price, multiplied by the number of shares for which the option was being exercised.

    (2)

    Amounts disclosed in this column were calculated based on the fair market value of the shares on the date of vesting.

    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$750,000 and is eligible to: (i) receive an annual incentive bonus of up totargeted at 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 plans and executive perquisites. Mr. Marsh'sMarsh’s employment may be terminated by the Company with or without "Cause,"“Cause,” as defined in the agreement, or by Mr. Marsh for "Good“Good Reason," as defined in the agreement, and includes a material negative change in his compensation or responsibilities or a material change to his current geographic work location, or without "Good Reason"Good Reason upon written notice of termination to the Company. If Mr. Marsh'sMarsh’s employment is terminated by the Company for any reason other thanwithout 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 a lump sum equal to 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, subject to Mr. Marsh’s copayment of premium amounts at the Company is requiredactive employees’ rate, Mr. Marsh will be eligible to continue paying forto participate in the Company’s group health, dental, vision and life insurance and other benefits for Mr. Marsh and his eligible family membersprograms for twelve (12) months following his termination.

    The agreement also provides among other things, that if, within twelve (12) months after a "Change of“Change in Control," as defined in the agreement, the Company terminates Mr. Marsh'sMarsh’s employment without Cause or Mr. Marsh terminates his employment for Good Reason, then he is be entitled to:


    (iii)

    subject to Mr. Marsh’s copayment of premium amounts at the active employees’ rate, continued participation in the Company’s group health, dental, vision and life insurance programs for twelve (12) months following such termination.

    The Company and Messrs. Middleton, Shrestha, Schmid Conway, and Crespo are each parties to Executive Employment Agreementsan employment agreement pursuant to which, if any of theirthe executive’s employment is terminated by the Company for any reason other than "Cause,"without “Cause,” as defined in the applicable 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 and includes a material negative change in his compensation or responsibilities or a material change to his current geographic work location, the Company is obligated to pay each anthe executive a lump sum amount equal to one (1) times his annual base salary. In addition, as of the date of termination, any restricted stock, stock options and other stock awards held by eachthe executive will accelerate vesting as if he had remained an employee for an additional twelve (12) months following the date of termination. Further, subject to the executive’s copayment of premium amounts at the active employees’ rate, the Company is required to continue paying its share of the premiums for a portion ofthe executive’s participation in the Company’s group health insurance for each and his eligible family membersplans 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 Agreementsemployment agreements also provide among other things, that if, within twelve (12) months after a "Change of“Change in Control," as defined in the applicable agreement, the Company terminates such executive'sexecutive’s employment without Cause or the executive terminates his employment for “Good Reason” as defined in the applicable agreement, then such executive shall be entitled to:

    The Company and Messrs. Marsh, Middleton, Shrestha, Schmid Conway and Crespo are parties to employment agreements, respectively, that provide for a potential payment upon termination of employment other than for "Cause"“Cause” as discussed above inEmployment Agreements. “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'sexecutive’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 of employment without causeCause 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 causeCause on December 31, 2018,2020 and such termination was not within twelve (12) months following a Change in Control, the approximate value of the severance package, including, as mentioned above inEmployment “Employment Agreements,, salary, benefits and accelerated vesting of equity awards, under his employment agreement would have been $1,001,110.$36,440,468. If Mr. Middleton, Mr. Schmid,Shrestha, Mr. Conway,Schmid, or Mr. Crespo had been terminated without causeCause on December 31, 2018,2020 and such termination was not within twelve (12) months following a Change in Control, the approximate value of the severance packages, including, as mentioned above inEmployment Agreements,, salary, benefits and accelerated vesting of equity awards, under the employment agreement for such named


    executive officer would have been:been as follows: Mr. Middleton—$587,196,14,257,236, Mr. Shrestha—$8,029,183, Mr. Schmid—$628,785, Mr. Conway—$503,637,15,383,037, and Mr. Crespo—$541,128.12,709,207.

    The Company and Messrs. Marsh, Middleton, Shrestha, Schmid, Conway, and Crespo are parties to employment agreements, respectively, that provide for a potential payment upon a "Changetermination of employment by the Company without Cause or a resignation by the executive for Good Reason within twelve (12) months following a Change in Control," as discussed above inEmployment Agreements. “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'sexecutive’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 ofin 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 ofin 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 of controlChange in Control had occurred on December 31, 20182020 and on that date the employment of Mr. Marsh, Mr. Middleton, Mr. Schmid,Shrestha, Mr. Conway,Schmid, or Mr. Crespo had been terminated by the Company without Cause experienced a material negative change in his compensation or responsibilities or experienced a material change to his current geographic work location,the executive had resigned for Good Reason, the value of the change of control paymentsthe severance packages, including, as mentioned above in “Employment Agreements,” salary, benefits and benefitsaccelerated vesting of equity awards, under the employment agreements for each such named executive officer would have been as follows: Mr. Marsh—$2,466,495,39,102,106, Mr. Middleton—$565,56114,204,736, Mr. Shrestha—$7,978,702, Mr. Schmid—$606,227, Mr. Conway—$484,31115,329,191, and Mr. Crespo—$528,436.12,678,245. The employment agreements provide for a modified cutback such that, any payments or benefits payable under the employment agreements or otherwise would be subject to the excise tax imposed by Section 4999 of the payments inCode, the eventexecutive will receive the greater after-tax amount of either: (i) the full payment or (ii) a reduced payment that does not give rise to the total value of all change of control benefits exceed the maximum benefit that allows for aexcise tax deduction for the Company underimposed by Section 280G4999 of the Internal Revenue Code of 1986, as amended.Code. The foregoing numbers do not reflect any cutback. None of the executives are entitled to any tax gross-up payments related to severance payments or otherwise.



    PROPOSAL 2: APPROVAL OF ANTHE CHARTER AMENDMENT AND RESTATEMENT OF THE COMPANY'S SECOND AMENDED AND RESTATED 2011 STOCK OPTION AND INCENTIVE PLAN

    Summary

    The Board of Directors has adopted resolutions approving, and recommending that the Thirdstockholders approve, an amendment to the Amended and Restated 2011 Stock Option and Incentive Plan

            In responseCertificate of Incorporation of the Company to feedback received from a proxy advisory firm regarding our Second Amended and Restated 2011 Stock Option and Incentive Plan (the "Second Amended and Restated 2011 Plan"), on March 29, 2019,increase the Board approved an amendment to our Second Amended and Restated 2011 Plan to require a minimum vesting period of one year for all equity awards, other than a limited number of excepted awards. authorized shares of Common Stock from 750,000,000 shares to 1,500,000,000 shares, an increase of 750,000,000 shares. The authorized capital stock of the Company currently consists of 750,000,000 shares of Common Stock and 5,000,000 shares of undesignated preferred stock, par value $0.01 per share. If the proposed amendment is approved, the authorized capital stock of the Company will consist of 1,500,000,000 shares of Common Stock and 5,000,000 shares of preferred stock, par value $0.01 per share. The form of the Fifth Certificate of Amendment of the Certificate of Incorporation of the Company to increase the number of authorized shares of Common Stock is attached as Appendix A to this Proxy Statement (the “Charter Amendment”).

    The Board also approvedis recommending the adoptionproposed increase in the number of a Policyauthorized shares of Common Stock to provide additional authorized shares of Common Stock for Recoupment of Incentive Compensation,use in connection with potential future financings, strategic opportunities, acquisitions, employee benefit plans or "clawback" policy.for other corporate purposes. The stockholders are being asked to approve an amendmentBoard determined that the Charter Amendment is advisable and restatementin the best interests of the Second AmendedCompany and Restated 2011 Plan (as proposeddirected that the Charter Amendment be submitted for adoption and approval by stockholders at the Annual Meeting. The Charter Amendment would not affect the number of authorized shares of preferred stock. Currently, there are no shares of preferred stock issued and outstanding. Except for shares of Common Stock that are reserved for issuance, the Company has no commitments at this time for the issuance of additional shares of Common Stock, but desires to be amendedposition itself to do so when needs arise and restated,market conditions warrant.

    As of the "Third AmendedRecord Date, there were 568,317,504 shares of Common Stock issued and Restated 2011 Plan")outstanding and 143,077,736 shares of Common Stock reserved for issuance, leaving a balance of 38,604,760 shares of authorized and unissued Common Stock available for issuance. The Company is obligated to among other things, increase thereserve for future issuance a sufficient number of shares of Common Stock authorized for issuance underto meet the Second Amended and Restated 2011 Plan from 30,000,000 sharesCompany’s obligations to 42,400,000 shares, an increase of 12,400,000 shares. On March 29, 2019,issue Common Stock upon the recommendationexercise and conversion of the Compensation Committee, our BoardCompany’s senior convertible notes, outstanding warrants to purchase Common Stock and outstanding options and other compensatory equity awards. The Company was obligated to reserve 143,077,736 shares as of Directorsthe Record Date.

    If the Charter Amendment is approved by the Third Amended and Restated 2011 Plan, subject to approval from our stockholders, at the Annual Meeting. Our named executive officers and directors have an interest in this proposal, as each of them is eligible to receive grants under the Third Amended and Restated 2011 Plan.

            As of March 22, 2019, 2,773,0861,500,000,000 shares of Common Stock were availablewill be authorized for issuance underand the Second Amended and Restated 2011 Plan. We currently expect that these shares, together with shares which become available due to the cancellation of outstanding awards, will be insufficient for awards to new hires, directors and existing employees.

            As of March 22, 2019, there were stock options to acquire 19,526,559additional authorized shares of Common Stock may be issued by the Company without any further action by the stockholders. Any additional authorized shares of Common Stock, if and when issued, would be part of the Company’s existing class of Common Stock, and would have the same rights and privileges as the currently outstanding undershares of Common Stock. The issuance of additional authorized shares of Common Stock, may, among other things, have a dilutive effect on earnings per share and on the Company's equity compensation plans with a weighted average exercise priceand voting power of $2.50existing holders of Common Stock. Although the Board of Directors has no present intention of issuing additional shares for such purposes, the proposed increase in the number of authorized shares could also enable the Board of Directors to render more difficult or discourage an attempt by another person or entity to obtain control of the Company.

    If the Company’s stockholders adopt and weighted average remaining term of 7.02 years. In addition, as of March 22, 2019, there were 2,372,347 unvested full-value awards outstanding underapprove the Company's equity compensation plans. Other thanCharter Amendment, the foregoing, no other awards underCharter Amendment will become effective on the Company's equity compensation plans were outstanding as of March 22, 2019.

    Rationale for Share Increase

            We believe strongly that the increase of shares issuable under the Second Amended and Restated 2011 Plan is essential to our continued success. Our employees are our most valuable assets. At our current and projected growth rate, we anticipate that we will grant shares to support new employee growth, employee retention efforts, director compensation and other stock-based incentive programs. Our Board has determineddate that it is infiled with the best interestSecretary of State of the State of Delaware. If the Charter Amendment is adopted and approved by the stockholders, the Company and ourcurrently anticipates filing the Charter Amendment with the Secretary of State of the State of Delaware on or around July 30, 2021.

    Failure by the stockholders to increaseapprove the Charter Amendment would reduce the ability of the Board to take the potential future actions to issue additional Common Stock discussed above.

    Vote Required for Approval

    A quorum being present, the affirmative vote of the holders of a majority of the outstanding shares issuable underof the Second AmendedCommon Stock is required for the approval of the Charter Amendment. For purposes of determining whether this proposal has passed, abstentions and Restated 2011 Plan. broker non-votes will be treated as votes cast against this proposal.

    Recommendation of the Board

    THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE “FOR” THE CHARTER AMENDMENT.

    PROPOSAL 3: APPROVAL OF THE COMPANY’S 2021 STOCK OPTION AND INCENTIVE PLAN

    Proposal

    The Board believes that stock options and other stock-based incentive awards can play an important role in theour success of the Company by encouraging and enabling theour officers, employees, officers, non-employee directors and other key persons of the Companyconsultants upon whose judgment, initiative and its subsidiaries upon whom the Companyefforts we largely dependsdepend for the successful conduct of itsour business to acquire a proprietaryan interest in theour Company. The Board anticipatesof Directors believes that providing such persons with a direct stake in theour Company will assureassures a closer identification of the interests of such individuals with those of theour Company and its stockholders, thereby stimulating their efforts on the Company'sour behalf and strengthening their desire to remain with Plug Power.

    On June 29, 2021, the Company.Board of Directors adopted, subject to stockholder approval, the Plug Power Inc. 2021 Stock Option and Incentive Plan (the “2021 Plan”). The 2021 Plan is designed to enhance the flexibility to grant equity awards to our officers, employees, non-employee directors and consultants and to ensure that we can continue to grant equity awards to eligible recipients at levels determined to be appropriate by the Board of Directors and/or the Compensation Committee. A copy of the 2021 Plan is attached as Appendix B to this Proxy Statement and is incorporated herein by reference.

    If the 2021 Plan is approved, we intend to discontinue granting awards under the Plug Power Inc. Third Amended and Restated 2011 Stock Option and Incentive Plan (the “2011 Plan”) and no new awards shall be granted under the 2011 Plan following the effective date of the 2021 Plan.

    As of December 31, 2020, there were:

     

    Stock options to acquire 10,284,498 shares of Common Stock outstanding under our equity compensation plans, with a weighted average exercise price of $5.78 and a weighted average remaining term of 7.8 years; and

    5,874,642 unvested full value awards with time-based vesting outstanding under our equity compensation plans.

    Other than the foregoing, no awards were outstanding under our equity compensation plans as of December 31, 2020. As of December 31, 2020, there were 848,909 shares of Common Stock available for awards under our equity compensation plans.

    Summary of Material Features of the 2021 Plan

    The material features of the 2021 Plan are:

    The maximum number of shares of Common Stock to be issued under the 2021 Plan is 22,500,000 plus any shares of Stock that are available for grant under the 2011 Plan as of the effective date of the 2021 Plan;

    The award of stock options (both incentive and non-qualified options), stock appreciation rights, restricted stock, restricted stock units, unrestricted stock, cash-based awards, and dividend equivalent rights is permitted;

    Shares tendered or held back for taxes will not be added back to the reserved pool under the 2021 Plan. Upon the exercise of a stock appreciation right that is settled in shares of Common Stock, the full number of shares underlying the award will be charged to the reserved pool under the 2021 Plan. Additionally, shares we reacquire on the open market will not be added to the reserved pool under the 2021 Plan;

    Stock options and stock appreciation rights will not be repriced in any manner without stockholder approval;

    The value of all awards awarded under the 2021 Plan and all other cash compensation paid by us to any non-employee director in any calendar year may not exceed $950,000;

    A minimum vesting period of one year is required for all equity awards, other than a limited number of excepted awards under the 2021 Plan;

    Any dividends and dividend equivalent rights payable with respect to any equity award are subject to the same vesting provisions as the underlying award;

    For purposes of determining the number of shares of Common Stock available for issuance under the 2021 Plan, the grant of any full value award (i.e., an award other than an option or a stock appreciation right) is deemed as an award of 1.5 shares of Common Stock for each such share of Common Stock actually subject to the award;

    Any material amendment to the 2021 Plan is subject to approval by our stockholders; and

    The term of the 2021 Plan will expire on July 30, 2031.

    Based solely on the closing price of our Common Stock as reported by the NASDAQ Capital Market on May 31, 2021 and the maximum number of shares that would have been available for awards as of such date under the 2021 Plan, the maximum aggregate market value of the Common Stock that could potentially be issued under the 2021 Plan is $690,750,000. The shares of Common Stock underlying any awards that are forfeited, canceled, cash-settled or otherwise terminated, other than by exercise, under the 2021 Plan and the 2011 Plan will be added back to the shares of Common Stock available for issuance under the 2021 Plan. Shares tendered or held back upon exercise of a stock option or settlement of an award under the 2021 Plan to cover the exercise price or tax withholding and shares subject to a stock appreciation right that are not issued in connection with the stock settlement of the stock appreciation right upon exercise thereof, will not be added back to the shares of Common Stock available for issuance under the 2021 Plan. In addition, shares of Common Stock repurchased on the open market will not be added back to the shares of Common Stock available for issuance under the 2021 Plan.

    Rationale for Share Increase

    The 2021 Plan is critical to our ongoing effort to continue to build stockholder value. Equity incentive awards are an important component of our executive and non-executive employees’ compensation. Our Compensation Committee and the Board of Directors believe that we must continue to offer a competitive equity compensation program in order to attract, retain and motivate the talented and qualified employees necessary for our continued growth and success.

    We manage our long-term stockholder dilution by limiting the number of equity incentive awards granted annually. The Compensation Committee carefully monitors our annual net burn rate, total dilution and equity expense in order to maximize stockholder value by granting only the appropriate number of equity incentive awards that it believes are necessary and appropriate to attract, reward and retain our employees. Our compensation philosophy reflects broad-based eligibility for equity incentive awards for high performing employees. By doing so, we link the interests of those employees directorswith those of our stockholders and other key persons.motivate our employees to act as owners of the business.


    Burn Raterate

    The following table sets forth information regarding historical equity awards granted and earned for the 20162018 through 20182020 period, and the corresponding burn rate, which is defined as the number of shares subject to equity-based awards granted in a year divided by the weighted average commonnumber of shares of Common Stock outstanding for that year, for each of the last three fiscal years:

     
     2018 2017 2016 

    Stock Options Granted

      2,679,667  5,485,863  3,702,500 

    Full-Value Shares Granted

      2,496,384  401,518  105,479 

    Adjusted Full-Value Shares Granted(1)

      3,744,576  602,277  158,219 

    Total Awards Granted(2)

      6,424,243  6,088,140  3,860,719 

    Weighted average common shares outstanding during the fiscal year

      218,882,337  216,343,985  180,619,860 

    Annual Burn Rate

      2.9% 2.8% 2.1%

    Three-Year Average Burn Rate(3)

      2.7%      

    (1)
    In accordance with the Second Amended and Restated 2011 Plan, Adjusted Full-Value Awards Granted represents the sum of Time-Based Full Value Awards Granted multiplied by 1.5.

    (2)
    Total Awards Granted represents the sum of Stock Options Granted and Adjusted Full-Value Awards.

    (3)
    As illustrated in the table above, our three-year average burn rate for the 2016-2018 period was 2.7%, which is less than the ISS industry category burn rate cap of 3.75%.

     If our request to increase the share reserve of the Second Amended and Restated 2011 Plan by an additional 12,400,000 shares is approved by stockholders, we will have approximately 15,173,086 shares available for grant under the Third Amended and Restated 2011 Plan, which is based on 2,773,086 shares available for grant under the Second Amended and Restated 2011 Plan at March 22, 2019, and the 12,400,000 shares subject to this proposal.

    Share Element  2018  2019  2020 

    Stock Options Granted

       2,679,667   3,221,892   3,509,549 

    Time-Based Full-Value Awards Granted

       2,496,384   3,316,177   3,263,324 

    Total Awards Granted

       5,176,051   6,538,069   6,772,873 

    Weighted average common shares outstanding during the fiscal year

       218,882,337   237,152,780   354,790,106 

    Annual Burn Rate

       2.36  2.76  1.91

    Three-Year Average Burn Rate

      

     

     

     

      2.34 

     

     

     

    Our Compensation Committee determined the size of the requested share increasereserved pool under the 2021 Plan based on projected equity awards to anticipated new hires, projected annual equity awards to existing employees directors and other key persons, and an assessment of the magnitude of increase that our stockholdersinstitutional investors and the firms that advise them would likely find acceptable. We anticipate that, if our request to increase the share reserve is approved by our stockholders, it will be sufficient to provide equity incentives to attract, retain, and motivate employees throughfor the next 36 months.one to two years.

    Summary of the Third Amended and Restated 2011 Stock Option and Incentive2021 Plan

            The Board of Directors believes that stock options and other stock-based incentive awards can play an important role in the success of the Company by encouraging and enabling the current employees, consultants, officers and non-employee directors and prospective employees of the Company and its subsidiaries upon whose judgment, initiative and efforts the Company largely depends for the successful conduct of its business to acquire a proprietary interest in the Company. The Board of Directors anticipates that providing such persons with a direct stake in the Company will assure a closer identification of the interests of participants in the plan with those of the Company and its stockholders, thereby stimulating their efforts on the Company's behalf and strengthening their desire to remain with the Company.

    The following description of certain features of the Third Amended and Restated 20112021 Plan is intended to be a summary only. The summary is qualified in its entirety by the full text of the Third Amended2021 Plan, which is attached hereto as Appendix B.

    Administration. The 2021 Plan will be administered by the Compensation Committee. The Compensation Committee has full power to select, from among the individuals eligible for awards, the individuals to whom awards will be granted, to make any combination of awards to participants, and Restated 2011 Plan, as set forth in Appendix A, attached hereto.


            The material featuresto determine the specific terms and conditions of each award, subject to the provisions of the Third Amended2021 Plan. The Compensation Committee may delegate to a committee consisting of one or more of our officers the authority to grant awards to employees who are not subject to the reporting and Restated 2011other provisions of Section 16 of the Exchange Act, subject to certain limitations and guidelines.

    Eligibility; Plan are:

            Based solely on the closing price of Common Stock as reported by the NASDAQ on March 22, 2019 and the maximum number of shares that would have been available for awards as of such date taking into account the proposed increase described herein, the maximum aggregate market value of Common Stock that could potentially be issued under the Third Amended and Restated 2011 Plan is $37,629,253. The shares we issue under the Third Amended and Restated 2011 Plan will be authorized but unissued shares or shares that we reacquire. The shares of Common Stock underlying any awards that are forfeited, canceled, reacquired by the Company prior to vesting, satisfied without any issuance of stock, expire or are otherwise terminated (other than by exercise) under the Third Amended and Restated 2011 Plan are added back to the shares of Common Stock available for issuance under the Third Amended and Restated 2011 Plan.exceed $950,000.

            Administration.    The Compensation Committee of our Board of Directors will administer the Third Amended and Restated 2011 Plan. The Compensation Committee of our Board of Directors is responsible for reviewing all of our executive compensation plans.

            Eligibility.    All of our employees, consultants and non-employee directors will be eligible to be granted awards under the Third Amended and Restated 2011 Plan. An employee, consultant or non-employee director granted an award will be a participant under the Third Amended and Restated 2011 Plan.


            Number of Shares Available for Issuance.    The maximum number of shares of Common Stock that are authorized for issuance under the Second Amended and Restated 2011 Plan prior to this amendment and restatement is 30,000,000. The maximum number of shares of Common Stock that will be authorized for issuance under the Third Amended and Restated 2011 Plan following this amendment and restatement will be 42,400,000. Shares issued under the Third Amended and Restated 2011 Plan may be treasury shares or authorized but unissued shares. In the event the number of shares to be delivered upon the exercise or payment of any award granted under the Third Amended and Restated 2011 Plan is reduced for any reason or in the event that any award (or portion thereof) can no longer be exercised or paid, the number of shares no longer subject to such award shall be released from such award and shall thereafter be available under the Third Amended and Restated 2011 Plan for the grant of additional awards. Upon the occurrence of a merger, consolidation, recapitalization, reclassification, stock split, stock dividend, combination of shares or the like, the plan administrator may ratably adjust the aggregate number and affected class of securities available under the Third Amended and Restated 2011 Plan.

    Minimum Vesting Period. The minimum vesting period for each equity award granted under the Third Amended and Restated 20112021 Plan must be at least one year, provided (1) that up to 5% of the shares authorized for issuance under the Third Amended and Restated 20112021 Plan may be utilized for unrestricted stock awards or other equity awards with a minimum vesting period of less than one year.year and (2) annual awards to non-employee directors that occur in connection with the Company’s annual

    meeting of stockholders may vest on the date of the Company’s next annual meeting of stockholders that is at least 50 weeks after the immediately preceding year’s annual meeting. In addition, the Compensation Committee may grant equity awards that vest within one year (i) if such awards are granted as substitute awards in replacement of other awards (or awards previously granted by an entity being acquired (or assets of which are being acquired)) that were scheduled to vest within one year or (ii) if such awards are being granted in connection with an elective deferrallieu of fully vested cash compensation that, absent a deferral election, otherwise would have been paidcompensation.

    Stock Options. The 2021 Plan permits the granting of (1) options to the grantee within the one year.

            Types of Awards.    The plan administrator may grant the following types of awards under the Third Amended and Restated 2011 Plan: stock options; restricted stock; or other stock-based awards.purchase Common Stock options awarded under the Third Amended and Restated 2011 Plan may be nonqualified stock options orintended to qualify as incentive stock options under Section 422 of the Internal Revenue Code of 1986,and (2) options that do not so qualify. Options granted under the 2021 Plan will be non-qualified options if they fail to qualify as amended. With the exception of incentive stock options or exceed the plan administrator may grant, from time to time, any of the types of awards under the Third Amended and Restated 2011 Plan to our employees, consultants and non-employee directors.annual limit on incentive stock options. Incentive stock options may only be granted to our employees.

            Effectemployees of Awards.Plug Power and its subsidiaries. Non-qualified options may be granted to any persons eligible to receive incentive stock options and to     For purposesnon-employee directors and consultants. The option exercise price of determiningeach option will be determined by the numberCompensation Committee. Except in the case of options (i) granted pursuant to a transaction described in, and in a manner consistent with, Section 424(a) of the Code, (ii) granted to individuals who are not subject to U.S. income tax on the date of grant or (iii) that are compliant with Section 409A of the Code, the exercise price of an option may not be less than 100% of the fair market value of the Common Stock on the date of grant. Fair market value for this purpose will be determined by reference to the price of the shares of Common Stock available for issuance underon the Third Amended and Restated 2011 Plan, the grant of any "full value" award, such as a restricted stock award, restricted stock unit, unrestricted stock award or performance share will be counted as 1.5 shares for each share of Common Stock actually subject to the award. The grant of any stock option or stock appreciation right will be counted for this purpose as one share from each share of Common Stock actually subject to the award.

            Stock Options.    A stock option is the right to acquire shares of Common Stock at a fixed price for a fixed period of time and generally is subject to a vesting requirement. To date, as a matter of practice, options have generally been subject to a three-year vesting period, with one-third of the total award vesting at the first anniversary of the grant date and the remainder vesting in equal thirds each anniversary thereafter. A stock option will be in the form of a nonqualified stock option or an incentive stock option.NASDAQ Capital Market. The exercise price is set as the market price on the grant date. Theof an option exercise price may not be reduced after the date of the option grant without stockholder approval, other than to appropriately reflect changechanges in our capital structure.

    The term of a stockeach option will be fixed by the Compensation Committee and generally may not exceed ten years from the date of grant. The Compensation Committee will determine at what time or five yearstimes each option may be exercised. Options may be made exercisable in installments and the exercisability of options may be accelerated by the Compensation Committee. In general, unless otherwise permitted by the Compensation Committee, no option granted under the 2021 Plan is transferable by the optionee other than by will or by the laws of descent and distribution or pursuant to a domestic relations order, and options may be exercised during the optionee’s lifetime only by the optionee, or by the optionee’s legal representative or guardian in the case of the optionee’s incapacity.

    Upon exercise of options, the option exercise price must be paid in full either in cash, by certified or bank check or other instrument acceptable to the Compensation Committee or by delivery (or attestation to the ownership) of shares of Common Stock that are beneficially owned by the optionee and that are not subject to risk of forfeiture. Subject to applicable law, the exercise price may also be delivered to us by a broker pursuant to irrevocable instructions to the broker from the optionee. In addition, non-qualified options may be exercised using a net exercise feature which reduces the number of shares issued to the optionee by the number of shares with a fair market value equal to the aggregate exercise price.

    To qualify as incentive stock options, grantedoptions must meet additional federal tax requirements, including a $100,000 limit on the value of shares subject to incentive stock options that first become exercisable by a 10% owner. After termination of an optionee, he or she may exercise his or her vested options for the period of time statedparticipant in the stock option agreement. If termination is for cause, vested options may no longer be exercised. In all other cases, the vested options will remain


    exercisable for executives twelve (12) months. However, an option may not be exercised later than its expiration date.any one calendar year.

    Stock Appreciation Rights. The Compensation Committee may award stock appreciation rights subject to such conditions and restrictions as the Compensation Committee may determine. Stock appreciation rights entitle the recipient to shares of Common Stock or cash equal to the value of the appreciation in the stock price over the exercise price. TheExcept in the case of stock appreciation rights (i) granted pursuant to a transaction described in, and in a manner consistent with, Section 424(a) of the Code, (ii) granted to individuals who are not subject to U.S. income tax on the date of grant or (iii) that are compliant with Section 409A of the Code, the exercise price ismay not be less than the fair market value of the Common Stock on the date of grant. The maximum term of a stock appreciation right isgenerally may not exceed ten years.

    Restricted Stock.    A restricted stock award is an award entitling the recipient to acquire, at par value or such other higher purchase price determined by the administrator, shares of stock subject to such restrictions and conditions as the administrator may determine at the time of grant. Conditions may be based on continuing employment (or other business relationship) and/or achievement of pre-established performance goals and objectives. The grant of a restricted stock award is contingent on the participant executing the restricted stock award agreement. Restricted stock awards are shares of Common Stock that are subject to cancellation, restrictions and vesting conditions, as determined by the plan administrator. Restricted stock awards generally vest over three years, beginning with one-third vesting one year after the date of grant, then pro-rata vesting monthly thereafter. Restricted stock awards are made pursuant to the Third Amended and Restated 2011 Plan.

            Restricted Stock Units. The Compensation Committee may award restricted stock units to any participants. Restricted stock units are ultimately payable in the form of shares of Common Stock and may beto participants subject to such conditions and restrictions as the Compensation Committee may determine. These conditions and restrictions may include the achievement of certain performance goals (as summarized above) and/or continued employment (or other service relationship) with us through a specified restricted period. During the Companyvesting period, restricted stock awards may be credited with dividends but dividends payable with respect to a restricted stock award shall not be paid unless and until the awards vests.

    Restricted Stock Units. The Compensation Committee may award restricted stock units to participants. Restricted stock units are ultimately payable in the form of shares of Common Stock or cash subject to such conditions and restrictions as the Compensation Committee may determine. These conditions and restrictions may include the achievement of certain performance goals and/or continued employment (or other service relationship) with us through a specified vesting period. However, except in the case of retirement, death, disability or a change of control, in the event these awards granted to employees have a performance-based goal, the restriction period will be at least one year, and in the event these awards granted to employees have a time-based restriction, the restriction period will be at least three years, but vesting can occur incrementally over the three-year period. In the Compensation Committee'sCommittee’s sole discretion, it may permit a participant to make an advance election to receive a portion of his or her future cash compensation otherwise due in the form of a deferredrestricted stock unit award, subject to the participant'sparticipant’s compliance with the procedures established by the Compensation Committee and requirements of Section 409A of the Code.

    Unrestricted Stock Awards. The Compensation Committee may also grant (or sell at par value or such higher price determined by the Compensation Committee) shares of Common Stock whichthat are free from any restrictions under the Third Amended and Restated 20112021 Plan. Unrestricted stock may be granted to any participant in recognition of past services or other valid consideration and may be issued in lieu of cash compensation due to such participant.

            Performance Share Awards.Dividend Equivalent Rights. The Compensation Committee may grant performance share awardsdividend equivalent rights to any participantparticipants, which entitle the recipient to receive credits for dividends that would be paid if the recipient had held specified shares of Common Stock. Dividend equivalent rights may be granted as a component of an award of restricted stock units or as a freestanding award and will be paid only if the related award becomes vested. Dividend equivalent rights may not be granted as a component of a stock option or stock appreciation right award. Dividend equivalent rights may be settled in cash, shares of Common Stock uponor a combination thereof, in a single installment or installments, as specified in the achievement of certain performance goals (as summarized above) and such other conditions as the Compensation Committee shall determine. These awards granted to employees will have a performance period of at least one year.award.

    Cash-Based Awards. The Compensation Committee may grant cash bonuses under the Third Amended and Restated 20112021 Plan to participants. The cash bonuses may be subject to the achievement of certain performance goals (as summarized above).goals.

    Change of Control Provisions.    The Third Amended and Restated 2011 Plan provides that upon In the effectivenessevent of a "sale event"“sale event,” as defined in the Third Amended and Restated 20112021 Plan, awards under the 2021 Plan may be assumed, continued or substituted. In the event that awards are not assumed, continued or substituted, except as otherwise provided by the Compensation Committee in the award agreement, all stock options and stock appreciation rights shall become fully exercisable andupon the restrictions and conditions oneffective time of the sale event, all such


    other awards with time-based conditions or restrictions will automatically be deemed waived. Awardsbecome vested and exercisable or non-forfeitable upon the sale event, and awards with conditions and restrictions relating to the attainment of performance goals may become vested and non-forfeitable in connection with a sale event in the Compensation Committee's discretion.Committee’s discretion or to the extent specified in the relevant award agreement. In addition, in the case of a sale event in which the Company's stockholders will receive cash consideration, the Companywe may make or provide for apayment, in cash paymentor in kind, to participants holding options and stock appreciation rights equal to the difference between the per share cash consideration and the exercise price of the options or stock appreciation rights (provided that, in exchangethe case of an option or stock appreciation right with an exercise price equal to or greater than the per share cash consideration, such option or stock appreciation right shall be cancelled for no consideration). We also have the cancellation thereto.option to make or provide for a payment, in cash or in kind, to grantees holding other awards in an amount equal to the per share cash consideration multiplied by the number of vested shares under such awards. All awards will terminate in connection with a sale event unless they are assumed by the successor entity.

    Adjustments for Stock Dividends, Stock Splits, Etc. The Third Amended and Restated 20112021 Plan requires the Compensation Committee to make appropriate adjustments to the number of shares of Common Stock that are subject to the Third Amended and Restated 20112021 Plan, to certain limits in the Third Amended and Restated 20112021 Plan, and to any outstanding awards to reflect stock dividends, stock splits, extraordinary cash dividends and similar events.

    Tax Withholding. Participants in the Third Amended and Restated 20112021 Plan are responsible for the payment of any federal, state or local taxes that the Company is required by law to withhold upon the exercise of options or stock appreciation rights or vesting of other awards. Subject to approval by theThe Compensation Committee participants may elect to have the minimumrequire that tax withholding obligations satisfied by authorizing the Company to withholdwithholding shares of Common Stock to be issued pursuant to the exercise or vestingvesting. The Compensation Committee may also require our tax withholding obligation to be satisfied, in whole or in part, by an arrangement whereby a certain number of shares issued pursuant to any award are immediately sold and proceeds from such award.sale are remitted to us in an amount that would satisfy the withholding amount due.

    Amendments and Termination. The Board may at any time amend or discontinue the Third Amended and Restated 20112021 Plan and the Compensation Committee may at any time amend or cancel any outstanding award for the purpose of satisfying changes in the law or for any other lawful purpose. However, no such action may adversely affect any rights under any outstanding award without the holder'sholder’s consent. To the extent required under the rules of the NASDAQ, any amendments that materially change the terms of the Third Amended and Restated 20112021 Plan will be subject to approval by our stockholders. Amendments shall also be subject to approval by our stockholders if and to the extent determined by the Compensation Committee to be required by the Code to preserve the qualified status of incentive options or to ensure that compensation earned under the Third Amended and Restated 2011 Plan qualifies as performance-based compensation under Section 162(m) of the Code.stock options.

    Effective Date of Third Amended and Restated 2011 Plan. The 2021 Plan was approved by our Board approved the Third Amended and Restated 2011 Plan on MarchJune 29, 2019.2021. Awards of incentive stock options may be granted under the Third Amended and Restated 20112021 Plan until May 9, 2029.June 29, 2031. No other awards may be granted under the Third Amended and Restated 20112021 Plan after the date that is 10ten years from the date of stockholder approval or May 9, 2029.approval.

    Because the grant of awards under the Third Amended and Restated 20112021 Plan is within the discretion of the Compensation Committee, we cannot determine the dollar value or number of shares of Common Stock that will in the future be received by or allocated to any participant in the Third Amended and Restated 20112021 Plan. Accordingly, in lieu of providing information regarding benefits that will be received under the Third Amended and Restated 20112021 Plan, the following table provides information concerning the benefits that were received by the following persons and groups during 2018:2020: each named executive officer; all current executive officers, as a group; all current directors who


    are not executive officers, as a group; and all current employees who are not executive officers, as a group.

       Options   Stock Awards 
    Name and Position  

    Average

    Exercise

    Price

    ($)

      

    Number of

    Awards

    (#)

       

    Dollar Value

    ($)(1)

      

    Number of

    Awards

    (#)

     

    Andrew J. Marsh, President, Chief Executive Officer and Director

       14.36   550,000    7,260,000   550,000 

    Paul B. Middleton, Chief Financial Officer and Senior Vice President

       14.36   200,000    2,640,000   200,000 

    Sanjay K. Shrestha, Chief Strategy Officer

       14.36   225,000    2,970,000   225,000 

    Keith C. Schmid, Chief Operating Officer and Senior Vice President

       14.36   200,000    2,640,000   200,000 

    Jose Luis Crespo, Vice President-Global Sales

       13.20   175,000    2,310,000   175,000 

    All current executive officers, as a group

       14.20(2)   1,560,000    20,592,000(3)   1,560,000 

    All current directors who are not executive officers, as a group

       4.88(2)   89,649    437,500(3)   89,649 

    All current employees who are not executive officers, as a group

       11.96(2)   1,789,900    19,671,400(3)   1,577,500 

    (1)

    The valuation of stock awards is based on the grant date fair value computed in accordance with FASB ASC Topic 718. For a discussion of the assumptions used in calculating these values, see Note 10 to our consolidated financial statements in our annual report on Form 10-K for the fiscal year ended December 31, 2020.

     
     Option Awards Stock Awards 
    Name and Position
     Dollar Value
    ($)(1)
     Number of
    Awards (#)
     Dollar Value
    ($)(1)
     Number of
    Awards
    (#)
     

    Andrew J. Marsh,President, Chief Executive Officer and Director

      775,000  500,000  980,000  500,000 

    Paul B. Middleton,Chief Financial Officer and Senior Vice President

      310,000  200,000  392,000  200,000 

    Jose Luis Crespo,Vice President—Global Sales

      310,000  200,000  392,000  200,000 

    Keith Schmid,Chief Operating Officer and Senior Vice President

      387,500  250,000  490,000  250,000 

    Gerard L. Conway, Jr.,General Counsel, Corporate Secretary and Senior Vice President

      310,000  200,000  392,000  200,000 

    All current executive officers, as a group

      2,092,500(2) 1,350,000  2,646,000(2) 1,350,000 

    All current directors who are not executive officers, as a group

      465,810(2) 284,667  437,502(2) 207,347 

    All current employees who are not executive officers, as a group

      1,594,250(2) 1,045,000  1,548,400(2) 790,000 

    (1)
    The valuation of stock awards is based on the grant date fair value computed in accordance with FASB ASC Topic 718. For a discussion of the assumptions used in calculating these values, refer to note 15 of the Company's consolidated financial statements in our Form 10-K for the year ended December 31, 2018, as filed with the SEC.

    (2)
    Represents the aggregate grant date fair value for the group.

    The following is a summary of the principal federal income tax consequences of certain transactions under the Third Amended and Restated 20112021 Plan. It does not describe all federal tax consequences under the Third Amended and Restated 20112021 Plan, nor does it describe state or local tax consequences.

    Incentive Stock Options. No taxable income is generally realized by the optionee upon the grant or exercise of an incentive stock option. If shares of Common Stock issued to an optionee pursuant to the exercise of an incentive stock option are sold or transferred after two years from the date of grant and after one year from the date of exercise, then (i) upon sale of such shares, any amount realized in excess of the optionexercise price (the amount paid for the shares) will be taxed to the optionee as a long-term capital gain, and any loss sustained will be a long-term capital loss, and (ii) the Companywe will not be entitled to any deduction for federal income tax purposes. The exercise of an incentive stock option will give rise to an item of tax preference that may result in alternative minimum tax liability for the optionee.

    If shares of Common Stock acquired upon the exercise of an incentive stock option are disposed of prior to the expiration of the two-year and one-year holding periods described above (a "disqualifying disposition"“disqualifying disposition”), generally (i) the optionee will realize ordinary income in the year of disposition in an amount equal to the excess (if any) of the fair market value of the shares of Common Stock at exercise (or, if less, the amount realized on a sale of such shares of Common Stock) over the optionexercise price thereof, and (ii) we will be entitled to deduct such amount. Special rules will apply where all or a portion of the exercise price of the incentive stock option is paid by tendering shares of Common Stock.


    If an incentive stock option is exercised at a time when it no longer qualifies for the tax treatment described above, the option is treated as a non-qualified option. Generally, an incentive stock option will not be eligible for the tax treatment described above if it is exercised more than three months following termination of employment (or one year in the case of termination of employment by reason of disability). In the case of termination of employment by reason of death, the three-month rule does not apply.

    Non-Qualified Options. No income is realized by the optionee at the time thea non-qualified option is granted. Generally (i) at exercise, ordinary income is realized by the optionee in an amount equal to the difference between the optionexercise price and the fair market value of the shares of Common Stock on the date of exercise, and we receive a tax deduction for the same amount, and (ii) at disposition, appreciation or depreciation after the date of exercise is treated as either short-term or long-term capital gain or loss depending on how long the shares of Common Stock have been held. Special rules will apply where all or a portion of the exercise price of the non-qualified option is paid by tendering shares of Common Stock. Upon exercise, the optionee will also be subject to Social Security taxes on the excess of the fair market value over the exercise price of the option.

    Other Awards.    The Company We generally will be entitled to a tax deduction in connection with an awardother awards under the Third Amended and Restated 20112021 Plan in an amount equal to the ordinary income realized by the participant at the time the participant recognizes such income. Participants typically are subject to income tax and recognize such tax at the time that an award is exercised, vests or becomes non-forfeitable, unless the award provides for a further deferral.

    Parachute Payments. The vesting of any portion of an option or other award that is accelerated due to the occurrence of a change in control (such as a sale event) may cause a portion of the payments with respect to such accelerated awards to be treated as "parachute payments"“parachute payments” as defined in the Code. Any such parachute payments may be non-deductible to the Company,us, in whole or in part, and may subject the recipient to a non-deductible 20 percent 20% federal excise tax on all or a portion of such payment (in addition to other taxes ordinarily payable).

    Limitation on Deductions. Under Section 162(m) of the Code, the Company'sour deduction for certain awards under the Third Amended and Restated 20112021 Plan may be limited to the extent that any "covered employee"“covered employee” (as defined in Section 162(m) of the Code) receives compensation in excess of $1 million a year.

    The following table providesgives information, as of December 31, 2018 regarding2020, about the shares of our Common Stock that may be issued upon the exercise of options and restricted stock and Common Stock


    warrants under the Company'sCompany’s 1999 Stock Option and Incentive Plan, as amended (the “1999 Plan”), and the Company's Second Amended and Restated 2011 Stock Option and Incentive Plan.Plan:

     
     Equity Compensation Plan Information 
    Plan category
     Number of securities to be
    issued upon exercise of
    outstanding options,
    warrants and rights
     Weighted Average
    exercise price of
    outstanding options,
    warrants and rights
     Number of securities
    remaining available for
    future issuance under equity
    compensation plan (excluding
    securities referenced in
    column (a))
     
     
     (a)
     (b)
     (c)
     

    Equity compensation plans approved by security holders:

      22,496,058(1)$2.25  2,314,830(2)

    Equity compensation plans not approved by security holders:

      1,808,439(3)$2.49   

    Total

      24,304,497     2,314,830 

    (1)
    Represents 368,489 outstanding options issued under the 1999 Plan, 19,780,222 outstanding options issued under the Second Amended and Restated 2011 Plan, and 2,347,347 shares of restricted stock issued under the Second Amended and Restated 2011 Plan.

    (2)
    Includes shares available for future issuance under the Second Amended and Restated 2011 Plan.

    (3)
    Included in "equity compensation plans not approved by security holders" are shares granted to new employees for key positions within the Company. No specific shares have been allocated for this purpose, but rather equity awards are approved by the Company's Board of Directors in specific circumstances.

    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)(1)
       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

       15,234,454(2)  $3.65    848,909(3) 

    Equity compensation plans not approved by security holders

       924,686(4)  $4.12    —   
         

     

     

     

    Total

       16,159,140     848,909 
      

     

     

        

     

     

     

    (1)

    The weighted-average exercise price is calculated solely based on outstanding options.

    (2)

    Represents 121,019 outstanding options issued under the 1999 Plan, 9,238,793 outstanding options issued under the 2011 Plan and 5,874,642 shares of restricted stock granted under the 2011 Plan.

    (3)

    Includes shares available for future issuance under the 2011 Plan.

    (4)

    Included in equity compensation plans not approved by stockholders are shares granted to new employees as an inducement to join the Company pursuant to Rule 5635(c)(4) of the NASDAQ listing rules.

    Vote Required for Approval

    A quorum being present, the affirmative vote of the holders of a majority in voting power of the shares of Common Stock and Series C Preferred Stock, voting together as a single class, present in person or represented by proxy at the Annual Meeting and entitled to vote on suchthis proposal is required to approvefor the Third Amended and Restated 2011approval of the 2021 Plan.


    Recommendation of the Board

    THE BOARD OF DIRECTORSUNANIMOUSLY RECOMMENDS THAT YOU

    VOTE "FOR"FOR THE APPROVAL OF THE AMENDMENT AND RESTATEMENT OF THE PLUG POWER INC. SECOND AMENDED AND RESTATED 20112021 STOCK OPTION AND INCENTIVE PLAN.PLAN



    PROPOSAL 3:4: NON-BINDING, ADVISORY VOTE ON EXECUTIVE COMPENSATION

    Overview

            In accordance withPursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, which added Section 14A ofto the Exchange Act, we are providing our stockholders with the opportunity to vote on a non-binding, advisory resolution to approve the compensation of our Named Executive Officers, whichnamed executive officers. This vote is described innot intended to address any specific item of compensation or the section titled "Compensation Discussion and Analysis" in this Proxy Statement. Accordingly, the following resolution will be submitted for a stockholder vote at the Annual Meeting:

    As described in the section titled "Compensation“Compensation Discussion and Analysis,"” herein, our executive compensation program is designed to (1) attract and retain talented and experienced executives, (2) motivate and reward executives whose knowledge, skills and performance are critical to our success, (3) provide a competitive compensation package which is weighted towards pay-for-performance and in which total compensation is primarily determined by Company and individual results and the creation of shareholderstockholder value, (4) ensure fairness among the executive management team by recognizing the contributions each executive makes to our success, and (5) motivate our executives to manage our business to meet our short- and long-term objectives and reward them for meeting these objectives. In order to align executive compensation with the interests of our stockholders, an important portion of compensation for our Named Executive Officersnamed executive officers is "at“at risk," or contingent upon the successful achievement of annual as well as long-term strategic corporate goals that we believe will drive stockholder value. Stockholders are urged to read the Compensation Discussion and Analysis section of this Proxy Statement, which more thoroughly discusses how our compensation policies and procedures implement our compensation philosophy and objectives. The Compensation Committee and the Board believe that these policies and procedures are effective in implementing our compensation philosophy and in achieving itsour objectives. Accordingly, we are asking our stockholders to vote “FOR” the following resolution at the Annual Meeting:

    “RESOLVED, that the stockholders of Plug Power Inc. (the “Company”) approve, on an advisory basis, the compensation paid to the Company’s named executive officers, as disclosed in this Proxy Statement pursuant to Item 402 of Regulation S-K, including the Compensation Discussion and Analysis, compensation tables and narrative discussion.”

    We encourage stockholders to read closely the “Executive Compensation” section of this Proxy Statement beginning with “Compensation Discussion and Analysis” for additional details on the Company’s executive compensation programs and philosophy.

    This vote is only advisory, and therefore will not be binding upon the Company, the Board or the Board.Compensation Committee. However, the Board valuesand the Compensation Committee value constructive dialogue with, and the opinions of, our stockholders on executive compensation and other important governance topics withwill take into account the Company's stockholders and encourages all stockholders tooutcome of the vote their shares on this matter.when considering future compensation decisions for our named executive officers.

    Vote Required for Approval

    A quorum being present, the affirmative vote of the holders of a majority in voting power of the shares of Common Stock and Series C Preferred Stock, voting together as a single class, present in person or represented by proxy at the Annual Meeting and entitled to vote on such proposal is required to approve this resolution. Even though this vote will neither be binding on the Company or the Board nor will it create or imply any change in the fiduciary duties of, or impose any additional fiduciary duty on, the Company or the Board, the Compensation Committee will take into account the outcome of the vote when considering future executive compensation decisions.


    Recommendation of the Board

    THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS THAT YOU VOTE "FOR"“FOR” THE APPROVAL, ON AN ADVISORY BASIS, OF THE OVERALL COMPENSATION OF THE COMPANY'SCOMPANY’S NAMED EXECUTIVE OFFICERS.OFFICERS AS DISCLOSED IN THIS PROXY STATEMENT.

    UNLESS OTHERWISE INSTRUCTED, PROXIES SOLICITED BY THE BOARD WILL BE VOTED "FOR" THIS RESOLUTION.


    PROPOSAL 4:5: RATIFICATION OF APPOINTMENT OF INDEPENDENT AUDITORSREGISTERED PUBLIC ACCOUNTANTS

    Introduction

    The Audit Committee of the Board has appointed the firm of KPMG LLP, to serve as independent auditors of the Company for 2019.2021. KPMG LLP has served as the Company'sCompany’s independent auditors since December 3, 2001. The Audit Committee reviewed and discussed its selection of, and the performance of, KPMG LLP for 2018.2021. As a matter of good corporate governance, the Audit Committee has determined to submit its selection to stockholders for ratification. If the selection of the independent auditors is ratified, the Audit Committee in its discretion may select different independent auditors at any time during the year if it determines that such a change would be in the best interests of the Company and its stockholders.

    The Audit Committee has implemented procedures under the Company'sCompany’s Audit Committee pre-approval policy for audit and non-audit services (the "Pre-Approval Policy"“Pre-Approval Policy”) to ensure that all audit and permitted non-audit services to be provided to the Company have been pre-approved by the Audit Committee. Specifically, the Audit Committee pre-approves the use of KPMG LLP for specific audit and non-audit services, within approved monetary limits. If a proposed service has not been pre-approved pursuant to the Pre-Approval Policy, then it must be specifically pre-approved by the Audit Committee before it may be provided by KPMG LLP. Any pre-approved services exceeding the pre-approved monetary limits require specific approval by the Audit Committee. For additional information concerning the Audit Committee and its activities with KPMG LLP, see "Committees“Committees and Meetings of the Board of Directors"Directors” and "Audit“Audit Committee Report"Report” above.

    Representatives of KPMG LLP attended all seventhirteen meetings of the Audit Committee in-person in 2018.2020. We expect that a representative of KPMG LLP will attend the Annual Meeting online, and the representative will have an opportunity to make a statement if he or she so desires. The representativeDue to the virtual meeting format, KPMG LLP will also be availablenot have the opportunity to respond to appropriate questions from stockholders.

    Vote Required for Approval

    A quorum being present, the affirmative vote of the holders of a majority in voting power of the shares of Common Stock and Series C Preferred Stock, voting together as a single class, present in person or represented by proxy at the Annual Meeting and entitled to vote on such proposal is required for the ratification of KPMG LLP as the Company'sCompany’s independent auditorsregistered public accounting firm for 2019.2021.


    Recommendation of the Board

    THE BOARD OF DIRECTORS UNANIMOUSLY RECOMMENDS A VOTE "FOR"“FOR” THE RATIFICATION OF KPMG LLP AS PLUG POWER INC.'S’S INDEPENDENT AUDITORSREGISTERED PUBLIC ACCOUNTING FIRM FOR 2019.2021.



    CERTAIN RELATIONSHIPSRELATED PARTY TRANSACTIONS, POLICIES AND PROCEDURES AND TRANSACTIONS WITH RELATED TRANSACTIONS
    PERSONS

    Investor Agreement

    Pursuant to the Investor Agreement, Grove Energy, a subsidiary of SK Holdings, is entitled to designate one SK Designee to be appointed to the Board. Grove Energy has the right to require the Board to nominate a SK Designee for election to the Board by the stockholders of the Company at annual stockholder meetings until the earliest of (i) the date on which Grove Energy and affiliates beneficially own less than 4.0% of our issued and outstanding common stock, (ii) February 24, 2023, in the event that the Company and SK E&S have not entered into the Asia JV Agreement, and (iii) any expiration or termination of the Asia JV Agreement.

    Related Party Transaction Policy

    The Board has adopted a written related party transaction policy that requires the Company'sCompany’s General Counsel, together with outside counsel as necessary, to evaluate potential transactions betweento which the Company is a participant and anyin which a related party or an affiliate of a related party has an interest prior to the Company entering into any such transaction. Certain related party transactions may requiretransaction to determine whether such contemplated transaction requires the approval of the Board, and itsthe Audit Committee.Committee, both or neither. The policy defines a "related party"“related party” as: (i) the Company'sCompany’s directors or executive officers, (ii) the Company'sCompany’s director nominees, (iii) security holders known to the Company to beneficially own more than 5% of any class of the Company'sCompany’s voting securities, or (iv) the immediate family members of any of the persons listed in 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.

    Other than as otherwise disclosed herein, since January 1, 2018, the Company has not entered into, and2020, there is not currently proposed, any transactionswas no transaction or series of similar transactions involving anto which the Company was or will be a party in which the amount in excess ofinvolved exceeded or will exceed $120,000 and in which any related party had or will have a direct or indirect material interest.



    PRINCIPAL STOCKHOLDERS

    The following table sets forth information regarding the beneficial ownership of our Common Stock as of March 22, 2019 (except as otherwise indicated) by:June 1, 2021:

    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
    (%)
     

    Grove Energy Capital LLC(3)

       54,966,188    9.7

    BlackRock, Inc.(4)

       47,161,335    8.3

    The Vanguard Group(5)

       40,465,986    7.1

    Andrew J. Marsh

       293,598    * 

    Paul B. Middleton

       38,260    * 

    Sanjay K. Shrestha(6)

       330,909    * 

    Keith C. Schmid(7)

       383,776    * 

    Jose Luis Crespo(8)

       101,721    * 

    Kimberly A. Harriman

       —      * 

    Maureen O. Helmer(9)

       153,501    * 

    Gregory L. Kenausis(10)

       323,217    * 

    George C. McNamee(11)

       978,723    * 

    Johannes M. Roth(12)

       471,197    * 

    Lucas P. Schneider(13)

       320,574    * 

    Jonathan Silver(14)

       55,695    * 

    Kyungyeol Song(15)

       —      * 

    Gary K. Willis(16)

       582,018    * 

    All executive officers and directors as a group (16 persons)(17)

       4,141,698    0.7

    *

    Represents less than 1% of the outstanding shares of our Common Stock.

    (1)

    Unless otherwise indicated, we believe that each stockholder named in the table above has sole voting and investment power with respect to all shares beneficially owned by them. 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 Exchange Act, 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 June 1, 2021, 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 our 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 are exercisable within 60 days of June 1, 2021 but excludes shares of Common Stock underlying options, warrants or other

    rights held by any other person. Percentage of beneficial ownership is based on 568,317,504 shares of Common Stock outstanding as of June 1, 2021. 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 13D filed with the SEC on March 8, 2021. Grove Energy Capital LLC is owned by Plutus Capital NY, Inc., a Delaware corporation (“Plutus”), and PNES Investments, LLC, a Delaware limited liability company (“PNES”). Plutus is wholly-owned by SK Holdings, a company organized under the laws of the Republic of Korea, and PNES is wholly-owned by SK E&S Americas, Inc., a Delaware corporation (“SK E&S Americas”). SK E&S Americas is wholly-owned by SK E&S Co., Ltd., a

    company organized under the laws of the Republic of Korea. 90% of the issued and outstanding Common Stock of SK E&S Co., Ltd. is owned by SK Holdings. The address of the principal business office of Grove Energy Capital LLC is 55 East 59th Street, New York, NY 10022.
    (4)

    Information is based on a Schedule 13G/A filed with the SEC on January 27, 2021. BlackRock, Inc. reported sole voting power over 46,314,057 shares of Common Stock and sole dispositive power over 47,161,335 shares of Common Stock. The address of the principal business office of BlackRock, Inc. is 55 East 52nd Street, New York, NY 10055.

    (5)

    Information is based on a Schedule 13G filed with the SEC on February 10, 2021. The Vanguard Group reported shared voting power over 905,146 shares of Common Stock, sole dispositive power over 39,203,572 shares of Common Stock and shared dispositive power over 1,262,414 shares of Common Stock. The address of the principal business office of The Vanguard Group is 100 Vanguard Blvd, Malvern, PA 19355.

    (6)

    Includes 100,000 shares of Common Stock issuable upon exercise of outstanding options.

    (7)

    Includes 183,335 shares of Common Stock issuable upon exercise of outstanding options.

    (8)

    Includes 1 share of Common Stock issuable upon exercise of outstanding options.

    (9)

    Includes 39,863 shares of Common Stock issuable upon exercise of outstanding options.

    (10)

    Includes 233,827 shares of Common Stock issuable upon exercise of outstanding options.

    (11)

    Includes 88,827 shares of Common Stock issuable upon exercise of outstanding options, and 300,000 shares of Common Stock held by a family trust.

    (12)

    Includes 243,827 shares of Common Stock issuable upon exercise of outstanding options.

    (13)

    Includes 200,179 shares of Common Stock issuable upon exercise of outstanding options.

    (14)

    Includes 12,807 shares of Common Stock issuable upon exercise of outstanding options.

    (15)

    Dr. Kyungyeol Song is an employee of SK E&S Co., Ltd. and will not receive any equity awards pursuant to the terms of the Investor Agreement.

    (16)

    Includes 170,827 shares of Common Stock issuable upon exercise of outstanding options.

    (17)

    Includes 1,273,493 shares of Common Stock issuable upon exercise of outstanding options.

     
     Shares Beneficially Owned(2) 
    Name and Address of Beneficial Owner(1)
     Number Percentage (%) 

    BlackRock, Inc.(3)

      16,527,822  6.8 

    Hudson Bay Capital Management LP(4)

      12,826,608  5.3 

    Andrew Marsh(5)

      3,901,786  * 

    Johannes Minoh Roth(6)

      3,155,467  * 

    Keith Schmid(7)

      1,483,961  * 

    George C. McNamee(8)

      1,437,752  * 

    Paul B. Middleton(9)

      938,903  * 

    Gerard L. Conway, Jr(10)

      821,852  * 

    Jose Luis Crespo(11)

      771,122  * 

    Gary K. Willis(12)

      589,313  * 

    Maureen O. Helmer(13)

      472,363  * 

    Gregory Kenausis(14)

      341,118  * 

    Lucas P. Schneider(15)

      239,726  * 

    Martin D. Hull(16)

      206,107  * 

    Gregory B. Graves(17)

      181,981  * 

    Jonathan Silver

      7,503  * 

    All executive officers and directors as a group (14 persons)(18)

      14,548,954  6.0%

    *
    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 Exchange Act, 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 March 22, 2019, 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 are exercisable within 60 days of March 22, 2019 but excludes shares of Common Stock underlying options, warrants or other rights held by any other person. Percentage of beneficial ownership is based on 243,904,166 shares of Common Stock outstanding as of

    (3)
    Information is based on a Schedule 13G filed with the SEC on February 5, 2019. The address of the principal business office of BlackRock, Inc. is 55 East 52nd Street, New York, NY 10055.

    (4)
    Information is based on Schedule 13G filed with the SEC on February 4, 2019. The address of the principal business office of Hudson Bay Capital Management LP is 777 Third Avenue, 30th Floor, New York, New York, 10017.

    (5)
    Includes 3,348,517 shares of Common Stock issuable upon exercise of outstanding options.

    (6)
    Includes (a) 203,964 shares of Common Stock issuable upon exercise of outstanding options and (b) 2,782,075 shares of Common Stock issuable upon conversion of Series C Preferred Stock owned by Five T Capital Holding AG, of which Mr. Roth is the Managing 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 directly held by Five T Capital Holding AG and Five 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.

    (7)
    Includes 1,433,334 shares of Common Stock issuable upon exercise of outstanding options.

    (8)
    Includes 245,964 shares of Common Stock issuable upon exercise of outstanding options, and 365,000 shares of Common Stock held by a family trust.

    (9)
    Includes 883,333 shares of Common Stock issuable upon exercise of outstanding options.

    (10)
    Includes 749,582 shares of Common Stock issuable upon exercise of outstanding options.

    (11)
    Includes 741,666 shares of Common Stock issuable upon exercise of outstanding options.

    (12)
    Includes 236,064 shares of Common Stock issuable upon exercise of outstanding options.

    (13)
    Includes 230,064 shares of Common Stock issuable upon exercise of outstanding options.

    (14)
    Includes 193,964 shares of Common Stock issuable upon exercise of outstanding options.

    (15)
    Includes 160,316 shares of Common Stock issuable upon exercise of outstanding options

    (16)
    Includes 183,333 shares of Common Stock issuable upon exercise of outstanding options

    (17)
    Includes 128,731 shares of Common Stock issuable upon exercise of outstanding options

    (18)
    Includes 8,738,832 shares of Common Stock issuable upon exercise of outstanding options


    DELINQUENT SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE
    REPORTS

    Section 16(a) of the Exchange Act requires the Company'sCompany’s officers, as defined by Section 16, and directors, and persons or entities who own more than 10% of a registered class of the Company's outstanding shares of Common Stock (collectively, "Section 16 Persons"),Company’s equity securities, to file initial reports of ownership and reports of changes in ownership with the SEC. Section 16 PersonsSuch persons or entities are required by SEC regulations to furnish the Company with copies of all Section 16(a) forms they file. To our knowledge, based on our review of the copies of such filings and based on written representations, we believe that all such persons and entities complied on a timely basis with all Section 16(a) filing requirements during the fiscal year ended December 31, 2020, except that the following persons or entities filed the following Form 4s late on the following dates:

     Form 3 and

    Keith C. Schmid filed a Form 4 wereon February 24, 2020 disclosing the sale of shares pursuant to a pre- established 10b5-1 trading plan and the exercise of options on February 18, 2020;

    Andrew J. Marsh, Gerard L. Conway, Jr. and Martin D. Hull each filed latea Form 4 on February 24, 2020 disclosing the sale of shares pursuant to pre-established 10b5-1 trading plans and the exercise of options on February 18, 2020 and February 19, 2020;

    Johannes M. Roth and FiveT Capital Holding AG filed Form 4s on April 28, 2020 disclosing the conversion of Series C Redeemable Convertible Preferred Stock into shares of Common Stock on April 16, 2020 and the sale of shares of Common Stock on April 22, 2020 and April 23, 2020 by Five More Special Situations Fund Ltd., which receives investment advisory services from a wholly-owned subsidiary of FiveT Capital Holding AG, in which entities Mr. Roth has equity interests and which shares of Common Stock Mr. Roth has expressly disclaimed beneficial ownership in, except to the extent of his pecuniary interest therein, if any;

    Sanjay K. Shrestha filed a Form 4 on May 14, 2020 disclosing the vesting of restricted stock and tendering of shares to cover tax withholding obligations in connection with such vesting on May 9, 2020;

    Andrew J. Marsh, Paul B. Middleton, Keith C. Schmid and Martin D. Hull each filed a Form 4 on September 1, 2020 disclosing the vesting of restricted stock and tendering of shares to cover tax withholding obligations in connection with such vesting on August 19, 2020;

    Gerard L Conway, Jr. filed a Form 4 on September 1, 2020 disclosing the vesting of restricted stock and tendering of shares to cover tax withholding obligations in connection with such vesting on August 19, 2020 and the sale of shares pursuant to a pre-established 10b5-1 trading plan on August 27, 2020; and

    Lucas P. Schneider filed a Form 4 on May 13, 2021 disclosing the sale of shares pursuant to a pre- established 10b5-1 trading plan on July 2, 2018 for Mr. Silver for a stock option grant made pursuant to the Company's Director Compensation Policy1, 2020 and in accordance with the Second Amended and Restated 2011 Plan.October 1, 2020.



    SUBMISSION OF STOCKHOLDER PROPOSALS FOR 20202022 ANNUAL MEETING

    Any stockholder proposals submitted pursuant to Exchange Act Rule 14a-8 and intended to be presented at the 20202022 Annual Meeting of Stockholders must be received by the Company on or before December 7, 2019March 11, 2022 to be eligible for inclusion in the Company'sCompany’s proxy statement and form of proxy to be distributed by the Board in connection with that meeting. Any such proposal should be mailed to: Corporate Secretary, Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110. Such proposal must also comply with the requirements as to form and substance established by the SEC for such a proposal to be included in the proxy statement and form of proxy.

    Any stockholder proposals (including recommendations of nominees for election to the Board) intended to be presented at the Company's 2020Company’s 2022 Annual Meeting of Stockholders, other than a stockholder proposal submitted pursuant to Exchange Act Rule 14a-8, must be received in writing at the principal executive office of the Company no earlier than January 10, 2020April 1, 2022 and no later than February 9, 2020.May 1, 2022. If the date of the 20202022 Annual Meeting is scheduled for a date more than 30 days before or more than 60 days after May 9, 2020,July 30, 2022, then such proposals must be received not later than the close of business on the later of the 90th90th day prior to the scheduled date of the 20202022 Annual Meeting or the 10th10th day following the day on which publishpublic announcement of the date of the 20202022 Annual Meeting is first made, as set forth in the Company's Company’s By-laws. Stockholder proposals must include all supporting documentation required by the Company's Company’s By-laws. Proxies solicited by the Board will confer discretionary voting authority with respect to these proposals, subject to SEC rules governing the exercise of this authority.


    DELIVERY OF PROXY MATERIALS AND ANNUAL REPORT

    Electronic Delivery

    The noticeNotice of Annual Meeting, andthis Proxy Statement, and 2018the 2020 Annual Report ison Form 10-K are available at www.proxyvote.com. Stockholders can elect to receive paper copies of the Annual Report and Proxy Statement in the mail by visiting at www.plugpower.com, by writing to Investor Relations at Plug Power Inc., 968 Albany Shaker Road, Latham, NYNew York 12110 or by contacting the Company at (518) 782-7700.

    Many brokerage firms and banks are also offering electronic proxy materials to their clients. If you are a beneficial owner of Plug Power stock, you may contact that broker or bank to find out whether this service is available to you. If your broker or bank uses Broadridge Investor Communications, you can sign up to receive electronic proxy materials at www.proxyvote.com.

            "Householding"“Householding” is the term used to describe the practice of delivering one copy of a document to a household of shareholders instead of delivering one copy of a document to each shareholder in the household. Stockholders who share a common address and who have not opted out of the householding process should receive a single copy of the Notice of Internet Availability of Proxy Materials for each account. If you received more than one copy of the Notice of Internet Availability of Proxy Materials, you may elect to household in the future; if you received a single copy of the Notice of Internet Availability of Proxy Materials, you may opt out of householding in the future, in either case, by writing to the Company at the following address, Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110, or by calling the Company at (518) 782-7700.

    In any event, you may obtain a copy of this Proxy Statement by writing to the Company at the following address: Plug Power Inc., 968 Albany Shaker Road, Latham, New York 12110.



    ANNUAL REPORT ON FORM 10-K

            The Company's 2018 Annual Report, including the consolidated financial statements for the year ended December 31, 2018, was furnished to stockholders with this Proxy Statement. Upon request, the Company will furnish without charge a copy of the Company's Annual Report on Form 10-K, which has been filed with the SEC. Stockholders may receive a copy of our Form 10-K by:

    APPENDIX A

    Additional information, including our SEC filingsa corporation organized and exhibits can be found on our webpageexisting under the "Investor Relations" heading.General Corporation Law of the State of Delaware (the “Corporation”), hereby certifies as follows:

    FIRST: That the Board of Directors of the Corporation has duly adopted resolutions (i) authorizing the Corporation to execute and file with the Secretary of State of the State of Delaware this Fifth Certificate of Amendment of Amended and Restated Certificate of Incorporation (this “Fifth Amendment”) to increase the authorized capital stock of the Corporation from 755,000,000 shares to 1,505,000,000 shares; and (ii) declaring this Fifth Amendment to be advisable, submitted to and considered by the stockholders of the Corporation entitled to vote thereon for approval by the affirmative vote of such stockholders in accordance with the terms of the Corporation’s Amended and Restated Certificate of Incorporation, as amended by the Certificate of Amendment of the Amended and Restated Certificate of Incorporation dated June 21, 2000, the Second Certificate of Amendment of the Amended and Restated Certificate of Incorporation dated May 19, 2011, the Third Certificate of Amendment of the Amended and Restated Certificate of Incorporation dated July 25, 2014, the Certificate of Correction to the Third Certificate of Amendment of the Amended and Restated Certificate of Incorporation dated December 21, 2016 and the Fourth Certificate of Amendment of the Amended and Restated Certificate of Incorporation dated June 30, 2017 (collectively, the “Certificate of Incorporation”) and Section 242 of the General Corporation Law of the State of Delaware (the “DGCL”) and recommended for approval by the stockholders of the Corporation.

    SECOND: That this Fifth Amendment was duly adopted in accordance with the terms of the Certificate of Incorporation and the provisions of Section 242 of the DGCL by the Board of Directors and stockholders of the Corporation.

    THIRD: That upon the effectiveness of this Fifth Amendment, the first paragraph of Article IV of the Certificate of Incorporation is hereby deleted and is replaced in its entirety with the following:

    “The total number of shares of capital stock which the Corporation shall have the authority to issue is One Billion Five Hundred Five Million (1,505,000,000) shares, of which (i) One Billion Five Hundred Million (1,500,000,000) shares shall be Common Stock, par value $0.01 per share, and (ii) Five Million (5,000,000) shares shall be preferred stock, par value $0.01 per share (consisting of 170,000 shares of previously designated Series A Junior Participating Cumulative Preferred Stock and 4,830,000 shares of undesignated preferred stock).”

    IN WITNESS WHEREOF, the Corporation has caused this Fifth Certificate of Amendment of Amended and Restated Certificate of Incorporation to be executed by Andrew Marsh, its President and Chief Executive Officer, this      day of July, 2021.


    PLUG POWER INC.

    By:

    Name:

    Andrew Marsh

    Title:

    President and Chief Executive Officer


    Exhibit A


    APPENDIX B

    PLUG POWER INC.

    THIRD AMENDED AND RESTATED
    2011

    2021 STOCK OPTION AND INCENTIVE PLAN

            SECTION 1.    GENERAL PURPOSE OF THE PLAN; DEFINITIONS 

    SECTION 1.

    GENERAL PURPOSE OF THE PLAN; DEFINITIONS

    (a) The name of the plan is the Third Amended and Restated Plug Power Inc. 20112021 Stock Option and Incentive Plan (the "Plan"(as amended from time to time, the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and other key persons (including Consultants and prospective employees) of Plug Power Inc. (the "Company"“Company”) and its SubsidiariesAffiliates upon whose judgment, initiative and efforts the Company largely depends for the successful conduct of its business to acquire a proprietary interest in the Company. It is anticipated that providing such persons with a direct stake in the Company'sCompany’s welfare will assure a closer identification of their interests with those of the Company and its stockholders, thereby stimulating their efforts on the Company'sCompany’s behalf and strengthening their desire to remain with the Company.

    The following terms shall be defined as set forth below:

    "Act"“Act” means the Securities Act of 1933, as amended, and the rules and regulations thereunder.

    "Administrator"“Administrator” means either the Board or the compensation committee of the Board or a similar committee performing the functions of the compensation committee and which is comprised of not less than two Non-Employee Directors who are independent.

    "Award"Affiliate” means, at the time of determination, any “parent” or “subsidiary” of the Company as such terms are defined in Rule 405 of the Act. The Board will have the authority to determine the time or times at which “parent” or “subsidiary” status is determined within the foregoing definition.

    "“Award” or Awards," except where referring to a particular category of grant under the Plan, shall include Incentive Stock Options, Non-Qualified Stock Options, Stock Appreciation Rights, DeferredRestricted Stock Awards, Restricted Stock Awards,Units, Unrestricted Stock Awards, Cash-Based Awards, and Performance Share Awards.Dividend Equivalent Rights.

    "Award Agreement"Certificate” means a written or electronic agreementdocument setting forth the terms and provisions applicable to an Award granted under the Plan. Each Award AgreementCertificate is subject to the terms and conditions of the Plan.

    "Board"“Board” means the Board of Directors of the Company.

    "Cash-Based Award"Award” means an Award entitling the recipient to receive a cash-denominated payment.

    "Code"“Code” means the Internal Revenue Code of 1986, as amended, and any successor Code, and related rules, regulations and interpretations.

    "Consultant"“Consultant” means any natural person thata consultant or adviser who provides bona fide services to the Company or an Affiliate as an independent contractor and such services are not in connection withwho qualifies as a consultant or advisor under Instruction A.1.(a)(1) of Form S-8 under the offer or sale of securities in a capital-raising transaction and do not directly or indirectly promote or maintain a market for the Company's securities.Act.

    "Covered Employee"“Dividend Equivalent Right” means an employee who is a "Covered Employee" within the meaning of Section 162(m) of the Code.

    "Deferred Stock Award" means an Award entitling the grantee to receive credits based on ordinary cash dividends that would have been paid on the shares of phantom stock unitsStock specified in the Dividend Equivalent Right (or other award to awhich it relates) if such shares had been issued to and held by the grantee.

    "Effective Date"Date” means the date on which the amended and restated Plan is approved by stockholdersbecomes effective as set forth in Section 20.19.

    "Exchange Act"Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder.


    "Fair Market Value"Value” of the Stock on any given date means the fair market value of the Stock determined in good faith by the Administrator; provided, however, that if the Stock is admitted to quotationlisted on the National Association of Securities Dealers Automated Quotation System


    ("NASDAQ" (“NASDAQ”), NASDAQ CapitalGlobal Market, The New York Stock Exchange or another national securities exchange or traded on any established market, the "Fair Market Value" of the Stockdetermination shall be the closing price of the Stock on such exchange on such date.made by reference to market quotations. If there are no market quotations for such date, the determination shall be made by reference to the last date preceding such date for which there are market quotations.

    "Incentive Stock Option"Option” means any Stock Option designated and qualified as an "incentive“incentive stock option"option” as defined in Section 422 of the Code.

    “Minimum Vesting Period” means the one-year period following the date of grant of an Award.

    "Non-Employee Director" Director” means a member of the Board who is not also an employee of the Company or any Subsidiary.

    "Non-Qualified Stock Option"Option” means any Stock Option that is not an Incentive Stock Option.

    "Option"“Option” or"Stock Option"Option” means anyan option to purchase shares of Stock granted pursuant to Section 5.

    "Performance-Based Award" means any Restricted Stock Award, Deferred Stock Award, Performance Share Award or Cash-Based Award granted to a Covered Employee that is intended to qualify as "performance-based compensation" under Section 162(m) of the Code and the regulations promulgated thereunder.

    Shares"Performance Criteria" means the criteria that the Administrator selects for purposes of establishing the Performance Goal or Performance Goals for an individual for a Performance Cycle. The Performance Criteria (which shall be applicable to the organizational level specified by the Administrator, including, but not limited to, the Company or a unit, division, group, or Subsidiary of the Company) that will be used to establish Performance Goals are limited to the following: earnings before interest, taxes, depreciation and amortization, net income (loss) (either before or after interest, taxes, depreciation and/or amortization), changes in the market price of the Stock, economic value-added, sales or revenue, acquisitions or strategic transactions, achievement of project development milestones, operating income (loss), cash flow (including, but not limited to, operating cash flow and free cash flow), return on capital, assets, equity, or investment, total stockholder returns, return on sales, gross or net profit levels, productivity, expense, margins, operating efficiency, capital raising transactions, debt transactions, working capital, earnings (loss) per shareshares of Stock sales or market shares and number of customers, any of which may be measured either in absolute terms or as compared to any incremental increase or as compared to results of a peer group. The Administrator may appropriately adjust any evaluation performance under a Performance Criterion to exclude any of the following events that occurs during a Performance Cycle: (i) asset write-downs or impairments, (ii) litigation or claim judgments or settlements, (iii) the effect of changes in tax law, accounting principles or other such laws or provisions affecting reporting results, (iv) accruals for reorganizations and restructuring programs, and (v) any item of an unusual nature or of a type that indicates infrequency of occurrence, or both, including those described in the Financial Accounting Standards Board's authoritative guidance and/or in management's discussion and analysis of financial condition of operations appearing the Company's annual report to stockholders for the applicable year.

    "Performance Cycle" means a calendar year period over which the attainment of one or more Performance Criteria will be measured for the purpose of determining a grantee's right to and the payment ofunderlying a Restricted Stock Award Deferred Stock Award, Performance Share Award or Cash-Based Award, the vesting and/or payment of which isthat remain subject to a risk of forfeiture or the attainmentCompany’s right of one or more Performance Goals.repurchase.

    "Performance Goals"“Restricted Stock Award” means, for a Performance Cycle, the specific goals established in writing by the Administrator for a Performance Cycle based upon the Performance Criteria.

    "Performance Share Award" means an Award entitling the recipient to acquire shares of Stock upon the attainment of specified Performance Goals.


    "Restricted Stock Award" means an Award entitling the recipient to acquire, at such purchase price (which may be zero) as determined by the Administrator, shares of StockShares subject to such restrictions and conditions as the Administrator may determine at the time of grant.

    "“Restricted Stock Units” means an Award of stock units subject to such restrictions and conditions as the Administrator may determine at the time of grant.

    Sale Event"Event” shall mean means (i) the sale of all or substantially all of the assets of the Company on a consolidated basis to an unrelated person or entity, (ii) a merger, reorganization or consolidation inpursuant to which the outstanding shares of Stock are converted into or exchanged for securities of the successor entity and the holders of the Company'sCompany’s outstanding voting power and outstanding stock immediately prior to such transaction do not own a majority of the outstanding voting power and outstanding stock or other equity interests of the resulting or successor entity (or its ultimate parent, if applicable) immediately upon completion of such transaction, or (iii) the sale of all of the Stock of the Company to an unrelated person, entity or entity.group thereof acting in concert, or (iv) any other transaction in which the owners of the Company’s outstanding voting power immediately prior to such transaction do not own at least a majority of the outstanding voting power of the Company or any successor entity immediately upon completion of the transaction other than as a result of the acquisition of securities directly from the Company.

            "Sale Price" means the value as determined by the Administrator of the consideration payable, or otherwise to be received by stockholders, per share of Stock pursuant to a Sale Event.

    "Section 409A" 409A” means Section 409A of the Code and the regulations and other guidance promulgated thereunder.

    "Stock"“Service Relationship” means any relationship as an officer, employee, director or Consultant of the Company or any Affiliate (e.g., a Service Relationship shall be deemed to continue without interruption in the event an individual’s status changes from full-time employee to part-time employee or Consultant).

    “Stock” means the Common Stock, par value $0.01 per share, of the Company, subject to adjustments pursuant to Section 3.

    "Stock Appreciation Right"Right” means an Award entitling the recipient to receive shares of Stock (or cash, to the extent explicitly provided for in the applicable Award Certificate) having a value equal to the excess of the Fair Market Value of the Stock on the date of exercise over the exercise price of the Stock Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right shall have been exercised.

    "Subsidiary"“Subsidiary” means any corporation or other entity (other than the Company) in which the Company has at least a 50 percent interest, either directly or indirectly.

    "Ten Percent Owner"Owner” means an employee who owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than 10 percent of the combined voting power of all classes of stock of the Company or any parent or subsidiary corporation.

    "Unrestricted Stock Award"Award” means an Award of shares of Stock free of any restrictions.

            SECTION 2.    ADMINISTRATION OF PLAN; ADMINISTRATOR AUTHORITY TO SELECT GRANTEES AND DETERMINE AWARDS 


        (vi) subject to the provisions of Section 5(c) or Section 6(d), as applicable, to extend at any time the period in which Stock Options and Stock Appreciation Rights may be exercised; and

        (vii) at any time to adopt, alter and repeal such rules, guidelines and practices for administration of the Plan and for its own acts and proceedings as it shall deem advisable; to interpret the terms and provisions of the Plan and any Award (including related written instruments); to make all determinations it deems advisable for the administration of the Plan; to decide all disputes arising in connection with the Plan; and to otherwise supervise the administration of the Plan.

    All decisions and interpretations of the Administrator shall be binding on all persons, including the Company and Plan grantees.

      (c)Delegation of Authority to Grant Options.Awards. Subject to applicable law, the Administrator, in its discretion, may delegate to a committee consisting of one or more officers of the Company, including the Chief Executive Officer of the Company, all or part of the Administrator'sAdministrator’s authority and duties with respect to the granting of Options,Awards to individuals who are (i) not subject to the reporting and other provisions of Section 16 of the Exchange

    Act and (ii) not Covered Employees.members of the delegated committee. Any such delegation by the Administrator shall include a limitation as to the amount of OptionsStock underlying Awards that may be granted during the period of the delegation and shall contain guidelines as to the determination of the exercise price and the vesting criteria. The Administrator may revoke or amend the terms of a delegation at any time but such action shall not invalidate any prior actions of the Administrator'sAdministrator’s delegate or delegates that were consistent with the terms of the Plan.

    (d)Award Agreement.Certificate. Other than with respect to Cash-Based Awards, Awards under the Plan shall be evidenced by Award AgreementsCertificates that set forth the terms, conditions and limitations for each Award which may include, without limitation, the term of an Award and the provisions applicable in the event employment or service terminates.

    (e)    Indemnification.Indemnification. Neither the Board nor the Administrator, nor any member of either or any delegate thereof, shall be liable for any act, omission, interpretation, construction or determination made in good faith in connection with the Plan, and the members of the Board and the Administrator (and any delegate thereof) shall be entitled in all cases to indemnification and reimbursement by the Company in respect of any claim, loss, damage or expense (including, without limitation, reasonable attorneys'attorneys’ fees) arising or resulting therefrom to the fullest extent permitted by law and/or under the Company'sCompany’s articles or bylaws or any directors'directors’ and officers'officers’ liability insurance coverage which may be in effect from time to time and/or any indemnification agreement between such individual and the Company.

    (f)Foreign Award Recipients.Recipients. Notwithstanding any provision of the Plan to the contrary, in order to comply with the laws in other countries in which the Company and its Subsidiaries operate or have employees or other individuals eligible for Awards, the Administrator, in its sole discretion, shall have the power and authority to: (i) determine which Subsidiaries shall be covered by the Plan; (ii) determine which individuals outside the United States are eligible to participate in the Plan; (iii) modify the terms and conditions of any Award granted to individuals outside the United States to comply with applicable foreign laws; (iv) establish subplans and modify exercise procedures and other terms and procedures, to the extent the Administrator determines such actions to be necessary or advisable (and such subplans and/or modifications shall be attached to this Plan as appendices); provided, however, that no such subplans and/or modifications shall increase the share limitations contained in Section 3(a) hereof; and (v) take any action, before or afteran Award is made, that the Administrator determines to be necessary or advisable to obtain approval or comply with any local governmental regulatory exemptions or approvals. Notwithstanding the foregoing, the Administrator may not take any actions hereunder, and no


      Awards shall be granted, that would violate the Exchange Act or any other applicable United States securities law, the Code, or any other applicable United States governing statute or law.

    (g) Minimum Vesting Period. The vesting period for each Award granted under the Plan must be at least equal to the Minimum Vesting Period; provided, however, notwithstanding the foregoing, (i) up to five percent of the shares of Stock authorized for issuance under the Plan may be utilized for Unrestricted Stock Awards or other Awards with a vesting period that is less than the Minimum Vesting Period (each such Award, an “Excepted Award”) and (ii) annual Awards to         SECTION 3.    STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTIONNon-Employee Directors that occur in connection with the Company’s annual meeting of stockholders may vest on the earlier of the one-year anniversary of the date of grant or the date of the Company’s next annual meeting of stockholders which is at least 50 weeks after the immediately preceding year’s annual meeting. Notwithstanding the foregoing, (x) in addition to Excepted Awards, the Administrator may grant Awards that vest (or permit previously granted Awards to vest) within the Minimum Vesting Period (i) if such Awards are granted as substitute Awards in replacement of other Awards (or awards previously granted by an entity being acquired (or assets of which are being acquired)) that were scheduled to vest within the Minimum Vesting Period or (ii) if such Awards are being granted in lieu of fully vested cash compensation and (y) nothing in this Section 2(g) shall limit the Administrator’s authority to provide for the accelerated vesting of Awards in the terms of an Award Certificate or as permitted in Section 2(b)(v) above.

      SECTION 3.

      STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTION

      (a)Stock Issuable.Issuable. The maximum number of shares of Stock reserved and available for issuance under the Plan shall be equal to the sum of (i) 42,400,000, 22,500,000 shares plus (ii) any shares of Stock that are available for grant under the numberPlug Power Inc. Third Amended and Restated 2011 Stock Option and Incentive Plan (the “2011 Plan”) as of the Effective Date, subject to adjustment as provided in this Section 3. For purposes of this limitation, the shares of Stock underlying any grants pursuant to thisawards under the Plan orand the Plug Power Inc. 1999 Stock Option and Incentive2011 Plan that are forfeited, canceled, repurchasedcash-settled or areotherwise terminated (other than by exercise). Shares shall be added back to the shares of Stock available for issuance under the Plan and, to the extent permitted under Section 422 of the Code and the regulations promulgated thereunder, the shares of Stock that may be issued as Incentive Stock Options; provided, however, any shares of Stock underlying awards under the 2011 Plan that again become available for grant pursuant to this Section 3(a) shall be added back as (i) one (1) share of Stock if such shares were subject to options or stock appreciation rights granted under the 2011 Plan, and (ii) as 1.5 shares of Stock if such shares were subject to awards other than options or stock appreciation rights granted under the 2011 Plan. Notwithstanding the foregoing, the following shares shall not be added to the shares authorized for grant under the Plan: (i) shares tendered or held back upon exercise of an Option or settlement of an Award to cover the exercise price or tax withholding, and (ii) shares subject to a Stock Appreciation Right that are not issued in connection with the stock settlement of the Stock Appreciation Right upon exercise thereof. In the event the Company repurchases shares of Stock on the open market, such shares shall not be available for future issuance underadded to the Plan. In addition, upon exerciseshares of Stock Appreciation Rights, the gross number of shares exercised shall be deducted from the total number of shares remaining available for issuance under the Plan. Subject to such overall limitations, shares of Stock may be issued up to such maximum number pursuant to any type or types of Award; provided, however, that Stock Options or Stock Appreciation Rights with respect to no more than 5,000,00022,500,000 shares of the Stock may be granted to any one individual grantee during any one calendar year period and no more than 42,400,000 shares of Stock shall be issued in the form of Incentive Stock Options. The shares available for issuance under the Plan may be authorized but unissued shares of Stock or shares of Stock reacquired by the Company.

              (b)    Maximum Awards to Non-Employee Directors.    Notwithstanding anything to Upon effectiveness of the contrary in this Plan, the value of all Awards awarded under this Plan and all other cash compensation paid by the Company to any Non-Employee Director in any calendar year shall not exceed $1,000,000. For the purpose of this limitation, the value of any Awardno new awards shall be its grant date fair value, as determined in accordance with ASC 718 or successor provision but excludinggranted under the impact of estimated forfeitures related to service-based vesting provisions.2011 Plan.

              (c)(b) Effect of Awards.Awards. The grant of any full value Award (i.e., an Award other than an Option or a Stock Appreciation Right) shall be deemed, solely for purposes of determining the number of shares of Stock available for issuance under Section 3(a) and not for any purpose outside of the Plan, as an Award of 1.5 shares of Stock for each such share of Stock actually subject to the Award. The grant of an Option or a Stock Appreciation Right shall be deemed, for purposes of determining the number of shares of Stock available for issuance under Section 3(a), as an Award for one share of Stock for each such share actually subject to the Award. Any forfeitures, cancellations, cash-settlement or other terminations (other than by exercise) of such Awards and of awards under the 2011 Plan shall be returned to the reserved pool of shares of Stock under the Plan in the same manner.

              (d)(c) Changes in Stock.Stock. Subject to Section 3(e)3(c) hereof, if, as a result of any reorganization, recapitalization, reclassification, stock dividend, extraordinary cash dividend, stock split, reverse stock split or other similar change in the Company'sCompany’s capital stock, the outstanding shares of Stock are increased or decreased or are exchanged for a different number or kind of shares or other securities of the Company, or additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of Stock or other securities, or, if, as a result of any merger or consolidation, sale of all or substantially all of the assets of the Company, the outstanding shares of Stock are converted into or exchanged for securities of the Company or any successor entity (or a parent or subsidiary thereof), the Administrator shall make an appropriate or proportionate adjustment in (i) the maximum number of shares reserved for issuance under the Plan, including the maximum number of shares that may be issued in the form of Incentive Stock Options, (ii) the number of Stock Options or Stock Appreciation Rights that can be granted to any one individual grantee and the maximum number of shares that may be granted under a Performance-Based Award, (iii) the number and kind of shares or other securities subject to any then outstanding Awards under the Plan, (iv)(iii) the repurchase price, if any, per share subject to each outstanding Restricted Stock Award, and (v)(iv) the exercise price for each share subject to any then


        outstanding Stock Options and Stock Appreciation Rights under the Plan, without changing the aggregate exercise price (i.e., the exercise price multiplied by the number of shares subject to Stock Options and Stock Appreciation Rights) as to which such Stock Options and Stock Appreciation Rights remain exercisable. The Administrator shall also make equitable or proportionate adjustments in the number of shares subject to outstanding Awards and the exercise price and the terms of

      outstanding Awards to take into consideration cash dividends paid other than in the ordinary course or any other extraordinary corporate event. The adjustment by the Administrator shall be final, binding and conclusive. No fractional shares of Stock shall be issued under the Plan resulting from any such adjustment, but the Administrator in its discretion may make a cash payment in lieu of fractional shares.

              (e)(d) Mergers and Other Transactions.    Except as the Administrator may otherwise specify with respect to particular Awards in the relevant Award documentation, inTransactions. In the case of and subject to the consummation of a Sale Event, the parties thereto may cause the assumption or continuation of Awards theretofore granted by the successor entity, or the substitution of such Awards with new Awards of the successor entity or parent thereof, with appropriate adjustment as to the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree. To the extent the parties to such Sale Event do not provide for the assumption, continuation or substitution of Awards, upon the effective time of the Sale Event, the Plan and all outstanding Awards granted hereunder shall terminate. In such case, except as may be otherwise provided in the relevant Award Certificate, all Options and Stock Appreciation Rights with time-based vesting conditions or restrictions that are not vested and/or exercisable immediately prior to the effective time of the Sale Event shall become fully vested and exercisable as of the effective time of the Sale Event, all other Awards with time-based vesting, conditions or restrictions shall become fully vested and nonforfeitable as of the effective time of the Sale Event, and all Awards with conditions and restrictions relating to the attainment of performance goals may become vested and nonforfeitable in connection with a Sale Event in the Administrator'sAdministrator’s discretion unless, in any case, the partiesor to the Sale Event agree that Awards will be assumed or continued by the successor entity. Upon the effective time of the Sale Event, the Plan and all outstanding Awards granted hereunder shall terminate, unless provision is made in connection with the Sale Eventextent specified in the sole discretion of the parties thereto for the assumption or continuation of Awards theretofore granted by the successor entity, or the substitution of such Awards with new Awards of the successor entity or parent thereof, with appropriate adjustment as to the number and kind of shares and, if appropriate, the per share exercise prices, as such parties shall agree (after taking into account any acceleration hereunder).relevant Award Certificate. In the event of such termination, (i) the Company shall have the option (in its sole discretion) to make or provide for a payment, in cash or in kind, to the grantees holding Options and Stock Appreciation Rights, in exchange for the cancellation thereof, in an amount equal to the difference between (A) the Sale Price multiplied by the number of shares of Stock subject to outstanding Options and Stock Appreciation Rights (to the extent then exercisable (after taking into account any acceleration hereunder) at prices not in excess of the Sale Price) and (B) the aggregate exercise price of all such outstanding Options and Stock Appreciation Rights;Rights (provided that, in the case of an Option or Stock Appreciation Right with an exercise price equal to or greater than the Sale Price, such Option or Stock Appreciation Right shall be cancelled for no consideration); or (ii) each grantee shall be permitted, within a specified period of time prior to the consummation of the Sale Event as determined by the Administrator, to exercise all outstanding Options and Stock Appreciation Rights (to the extent then exercisable) held by such grantee. The Company shall also have the option (in its sole discretion) to make or provide for a payment, in cash or in kind, to the grantees holding other Awards in an amount equal to the Sale Price multiplied by the number of vested shares of Stock under such Awards.

              (f)    Substitute Awards.    The Administrator may grant(e) Maximum Awards to Non-Employee Directors. Notwithstanding anything to the contrary in this Plan, the value of all Awards awarded under thethis Plan in substitution for stock and stock based awards held by employees, directors orall other key persons of another corporation in connection with the merger or consolidation of the employing corporation with the Company or a Subsidiary or the acquisitioncash compensation paid by the Company orto any Non-Employee Director in any calendar year for service as a Subsidiary of property or stock of the employing corporation. The Administrator may direct that the substitute awards be granted onNon-Employee Director during such terms and conditions as the Administrator considers appropriate in the circumstances. Any substitute Awards granted under the Planyear shall not count againstexceed $950,000. For the sharepurpose of this limitation, set forth in Section 3(a).


              SECTION 4.    ELIGIBILITYservice-based vesting provisions.

       

      SECTION 4.

      ELIGIBILITY

      Grantees under the Plan will be such fullofficers, employees, Non-Employee Directors or part-time officers and other employees, Non-Employee Directors and key persons (including Consultants and prospective employees) of the Company and its SubsidiariesAffiliates as are selected from time to time by the Administrator in its sole discretion.discretion; provided that Awards may not be granted to officers, employees, Non-Employee Directors or Consultants who are providing services only to any “parent” of the Company, as such term is defined in Rule 405 of the Act, unless (i) the stock underlying the Awards is treated as “service recipient stock” under Section 409A or (ii) the Company has determined that such Awards are exempt from or otherwise comply with Section 409A.

              SECTION 5.    STOCK OPTIONS 

      Stock Options granted under the Plan may be either Incentive Stock Options or Non-Qualified Stock Options. Incentive Stock Options may be granted only to employees of the Company or any Subsidiary that is a "subsidiary corporation"“subsidiary corporation” within the meaning of Section 424(f) of the Code. To the extent that any Option does not qualify as an Incentive Stock Option, it shall be deemed a Non-Qualified Stock Option.

              The Administrator in its discretion may grant Stock Options to eligible employees and key persons of the Company or any Subsidiary. Stock Options granted pursuant to this Section 5(a)5 shall be subject to the following terms and conditions and shall contain such additional terms and conditions, not inconsistent with the terms of the Plan, as the Administrator shall deem desirable. If the Administrator so determines, Stock Options may be granted in lieu of cash compensation at the optionee'soptionee’s election, subject to such terms and conditions as the Administrator may establish.


        after the grant date. The Administrator may at any time accelerate the exercisability of all or any portion of any Stock Option. An optionee shall have the rights of a stockholder only as to shares acquired upon the exercise of a Stock Option and not as to unexercised Stock Options.

        (e)Method of Exercise.Exercise. Stock Options may be exercised in whole or in part, by giving written or electronic notice of exercise to the Company, specifying the number of shares to be purchased. Payment of the purchase price may be made by one or more of the following methods except to the extent otherwise provided in the Option Award Agreement:Certificate:

          (i) In cash, by certified or bank check or other instrument acceptable to the Administrator;

          (ii) Through the delivery (or attestation to the ownership)ownership following such procedures as the Company may prescribe) of shares of Stock that are not then subject to restrictions under any Company plan. Such surrendered shares shall be valued at Fair Market Value on the exercise date; or

          (iii) By the optionee delivering to the Company a properly executed exercise notice together with irrevocable instructions to a broker to promptly deliver to the Company cash or a check payable and acceptable

      to the Company for the purchase price; provided that in the event the optionee chooses to pay the purchase price as so provided, the optionee and the broker shall comply with such procedures and enter into such agreements of indemnity and other agreements as the AdministratorCompany shall prescribe as a condition of such payment procedure.procedure; or

      (iv) With respect to Stock Options that are not Incentive Stock Options, by a "net exercise"“net exercise” arrangement pursuant to which the Company will reduce the number of shares of Stock issuable upon exercise by the largest whole number of shares with a Fair Market Value that does not exceed the aggregate exercise price.

      Payment instruments will be received subject to collection. The transfer to the optionee on the records of the Company or of the transfer agent of the shares of Stock to be purchased pursuant to the exercise of a Stock Option will be contingent upon receipt from the optionee (or a purchaser acting in his or her stead in accordance with the provisions of the Stock Option) by the Company of the full purchase price for such shares and the fulfillment of any other requirements contained in the Option Award AgreementCertificate or applicable provisions of laws (including the satisfaction of any withholding taxes that the Company is obligated to withhold with respect to the optionee). In the event an optionee chooses to pay the purchase price by previously-owned shares of Stock through the attestation method, the number of shares of Stock transferred to the optionee upon the exercise of the Stock Option shall be net of the number of attested shares. In the event that the Company establishes, for itself or using the services of a third party, an automated system for the exercise of Stock Options, such as a system using an internet website or interactive voice response, then the paperless exercise of Stock Options may be permitted through the use of such an automated system.


              SECTION 6.    STOCK APPRECIATION RIGHTS 

        SECTION 6.

        STOCK APPRECIATION RIGHTS

        (a)Award of Stock Appreciation Rights. The Administrator may grant Stock Appreciation Rights under the Plan. A Stock Appreciation Right is an Award entitling the recipient to receive shares of Stock (or cash, to the extent explicitly provided for in the applicable Award Certificate) having a value (if any) equal to the excess of the Fair Market Value of a share of Stock on the date of exercise over the exercise price of the Stock Appreciation Right multiplied by the number of shares of Stock with respect to which the Stock Appreciation Right shall have been exercised.

        (b) Exercise Price of Stock Appreciation Rights.Rights. The exercise price of a Stock Appreciation Right shall not be less than 100 percent of the Fair Market Value of the Stock on the date of grant. Notwithstanding the foregoing, Stock Appreciation Rights may be granted with an exercise price per share that is less than 100 percent of the Fair Market Value on the date of grant (i) pursuant to a transaction described in, and in a manner consistent with, Section 424(a) of the Code, (ii) to individuals who are not subject to U.S. income tax on the date of grant or (iii) the Stock Appreciation Right is otherwise compliant with Section 409A.

                (b)(c) Grant and Exercise of Stock Appreciation Rights.Rights. Stock Appreciation Rights may be granted by the Administrator independently of any Stock Option granted pursuant to Section 5 of the Plan.

                (c)(d) Terms and Conditions of Stock Appreciation Rights.Rights. Stock Appreciation Rights shall be subject to such terms and conditions as shall be determined from time to timeon the date of grant by the Administrator. The term of a Stock Appreciation Right may not exceed ten years. Notwithstanding the foregoing, to the extent permitted by Section 409A of the Code, in the event that on the last business day of the term of a Stock Appreciation Right (x) the exercise of the Stock Appreciation Right is prohibited by applicable law or (y) shares may not be

      purchased or sold by the holder of such Stock Appreciation Right due to the         SECTION 7.    RESTRICTED STOCK AWARDS“black-out


        with respect to such shares shall not be less than one year, and in the event any such Restricted Stock granted to employees shall have a time-based restriction, the total restriction period with respect to such shares shall not be less than three years; provided, however, that Restricted Stock with a time-based restriction may become vested incrementally over such three-year period. Subsequent to such date or dates and/or the attainment of such pre-established performance goals, objectives and other conditions, the shares on which all restrictions have lapsed shall no longer be Restricted StockShares and shall be deemed "vested." Except as“vested.”

        SECTION 8.

        RESTRICTED STOCK UNITS

        (a) Nature of Restricted Stock Units. The Administrator may otherwisegrant Restricted Stock Units under the Plan. A Restricted Stock Unit is an Award of stock units that may be settled in shares of Stock (or cash, to the extent explicitly provided by the Administrator eitherfor in the Award Agreement or, subject to Section 17 below, in writing after the Award Agreement is issued, a grantee's rights in any shares of Restricted Stock that have not vested shall automatically terminateCertificate) upon the grantee's terminationsatisfaction of employment (or other service relationship) with the Company and its Subsidiaries and such shares shall be subject to the provisions of Section 7(c) above.

              SECTION 8.    DEFERRED STOCK AWARDS

                (a)    Nature of Deferred Stock Awards.    The Administrator shall determine the restrictions and conditions applicable to each Deferred Stock Award at the

      time of grant. Conditions may be based on continuing employment (or other service relationship)Service Relationship) and/or achievement of pre-established performance goals and objectives. The grant of a Deferred Stock Award is contingent on the grantee executing the Deferred Stock Award Agreement. The terms and conditions of each such Award Agreement shall be determined by the Administrator, and such terms and conditions may differ among individual Awards and grantees. Notwithstanding the foregoing, in the event that any such Deferred Stock Award granted to employees shall have a performance-based goal, the restriction period with respect to such Award shall not be less than one year, and in the event any such Deferred Stock Award granted to employees shall have a time-based restriction, the total restriction period with respect to such Award shall not be less than three years; provided, however, that any Deferred Stock Award with a time-based restriction may become vested incrementally over such three-year period. Except in the case of DeferredRestricted Stock Units with a deferred settlement date that complies with Section 409A, at the end of the deferralvesting period, the DeferredRestricted Stock Award,Units, to the extent vested, shall be settled in the form of shares of Stock. Deferred Stock Awards(or cash, to the extent explicitly provided for in the applicable Award Certificate). Restricted Stock Units with deferred settlement dates are subject to Section 409A and shall contain such additional terms and conditions as the Administrator shall determine in its sole discretion in order for such Award to comply with the requirements of Section 409A.

      (b)Election to Receive DeferredRestricted Stock AwardsUnits in Lieu of Compensation.Compensation. The Administrator may, in its sole discretion, permit a grantee to elect to receive a portion of future cash compensation otherwise due to such grantee in the form of a Deferredan award of Restricted Stock Award.Units. Any such election shall be made in writing and shall be delivered to the Company no later than the date specified by the Administrator and in accordance with Section 409A and such other rules and procedures established by the Administrator. Any such future cash compensation that the grantee elects to defer shall be converted to a fixed number of phantom stock unitsRestricted Stock Units based on the Fair Market Value of Stock on the date the compensation would otherwise have been paid to the grantee if such payment had not been deferred as provided herein. The Administrator shall have the sole right to determine whether and under what circumstances to permit such elections and to impose such limitations and other terms and conditions thereon as the Administrator deems appropriate. Any Restricted Stock Units that are elected to be received in lieu of cash compensation shall be fully vested, unless otherwise provided in the Award Certificate.

      (c)Rights as a Stockholder.Stockholder. A grantee shall have the rights as a stockholder only as to shares of Stock acquired by the grantee upon settlement of a DeferredRestricted Stock Award.Units; provided, however, that the grantee may be credited with Dividend Equivalent Rights with respect to the stock units underlying his or her Restricted Stock Units, subject to the provisions of Section 11 and such terms and conditions as the Administrator may determine.

      (d)    Termination.Termination. Except as may otherwise be provided by the Administrator either in the Award AgreementCertificate or, subject to Section 1716 below, in writing after the Award Agreement is issued, a grantee'sgrantee’s right in all DeferredRestricted Stock AwardsUnits that have not vested shall automatically terminate


        upon the grantee'sgrantee’s termination of employment (or cessation of service relationship)Service Relationship) with the Company and its Subsidiaries for any reason.

              SECTION 9.    UNRESTRICTED STOCK AWARDS 

      SECTION 9.

      UNRESTRICTED STOCK AWARDS

      Grant or Sale of Unrestricted Stock.Stock. The Administrator may in its sole discretion, grant (or sell at par value or such higher purchase price determined by the Administrator) an Unrestricted Stock Award under the Plan. An Unrestricted Stock Award is an Award pursuant to which the grantee may receive shares of Stock free of any restrictions under the Plan. Unrestricted Stock Awards may be granted in respect of past services or other valid consideration, or in lieu of cash compensation due to such grantee.

              SECTION 10.    CASH-BASED AWARDS 

      SECTION 10.

      CASH-BASED AWARDS

      Grant of Cash-Based Awards.Awards. The Administrator may in its sole discretion, grant Cash-Based Awards under the Plan. A Cash-Based Award is an Award that entitles the grantee to any granteea payment in such number or amount andcash upon such terms, and subject to such conditions, as the Administrator shall determine at the timeattainment of grant.specified performance goals. The Administrator shall determine the maximum duration of the Cash-Based Award, the amount of cash to which the Cash-Based Award pertains, the conditions upon which the Cash-Based Award shall become vested or payable, and such other provisions as the Administrator shall determine. Each Cash-Based Award shall specify a cash-denominated payment amount, formula or payment ranges as determined by the Administrator. Payment, if any, with respect to a Cash-Based Award shall be made in accordance with the terms of the Award and may be made in cash.

      SECTION 11.

      DIVIDEND EQUIVALENT RIGHTS

      (a) Dividend Equivalent Rights. The Administrator may grant Dividend Equivalent Rights under the Plan. A Dividend Equivalent Right is an Award entitling the grantee to receive credits based on cash or individends that would have been paid on the shares of Stock asspecified in the Administrator determines.

              SECTION 11.    PERFORMANCE SHARE AWARDS

              SECTION 12.    PERFORMANCE-BASED AWARDS TO COVERED EMPLOYEES


        Administrator, in its discretion, may adjust or modify the calculation of Performance Goals for such Performance Cycle in order to prevent the dilution or enlargement of the rights of an individual (i) in the event of, or in anticipation of, any unusual or extraordinary corporate item, transaction, event or development, (ii) in recognition of, or in anticipation of, any other unusual or nonrecurring events affecting the Company, or the financial statements of the Company, or (iii) in response to, or in anticipation of, changes in applicable laws, regulations, accounting principles, or business conditions provided however, that the Administrator may not exercise such discretion in a manner that would increase the Performance-Based Award granted to a Covered Employee. Each Performance-Based Award shall comply with the provisions set forth below.

                (b)    Grant of Performance-Based Awards.    With respect to each Performance-Based Award granted to a Covered Employee, the Administrator shall select, within the first 90 days of a Performance Cycle (or, if shorter, within the maximum period allowed under Section 162(m) of the Code) the Performance Criteria for such grant, and the Performance Goals with respect to each Performance Criterion (including a threshold level of performance below which no amount will become payable with respect to such Award)

        SECTION 12.

        TRANSFERABILITY OF AWARDS

        (a) Transferability. Each Performance-Based Award will specify the amount payable, or the formula for determining the amount payable, upon achievement of the various applicable performance targets. The Performance Criteria established by the Administrator may be (but need not be) different for each Performance Cycle and different Performance Goals may be applicable to Performance-Based Awards to different Covered Employees.

                (c)    Payment of Performance-Based Awards.    Following the completion of a Performance Cycle, the Administrator shall meet to review and certify in writing whether, and to what extent, the Performance Goals for the Performance Cycle have been achieved and, if so, to also calculate and certify in writing the amount of the Performance-Based Awards earned for the Performance Cycle. The Administrator shall then determine the actual size of each Covered Employee's Performance-Based Award, and, in doing so, may reduce or eliminate the amount of the Performance-Based Award for a Covered Employee if, in its sole judgment, such reduction or elimination is appropriate.

                (d)    Maximum Award Payable.    The maximum Performance-Based Award payable to any one Covered Employee under the Plan for any Performance Cycle is 2,500,000 Shares (subject to adjustment as provided in Section 3(d) hereof) or $7,500,000 in the case of a Performance-Based Award that is a Cash-Based Award.

              SECTION 13.    TRANSFERABILITY OF AWARDS

                (a)    Transferability. Except as provided in Section 13(b)12(b) below, during a grantee'sgrantee’s lifetime, his or her Awards shall be exercisable only by the grantee, or by the grantee'sgrantee’s legal representative or guardian in the event of the grantee'sgrantee’s incapacity. No Awards shall be sold, assigned, transferred or otherwise encumbered or disposed of by a grantee other than by will or by the laws of descent and distribution or pursuant to a domestic relations order. No Awards shall be subject, in whole or in part, to attachment, execution, or levy of any kind, and any purported transfer in violation hereof shall be null and void.

        (b)Administrator Action.Action. Notwithstanding Section 13(a)12(a), the Administrator, in its discretion, may provide either in the Award AgreementCertificate regarding a given Award or by subsequent written approval that the grantee (who is an employee or director) may transfer his or her Awards (other than any Incentive Stock Options or Deferred Stock Awards)Options) to his or her immediate family members, to trusts for the benefit of such family members, or to partnerships in which such family members are the only partners, provided that the transferee agrees in writing with the Company to be bound by all of the terms and conditions of this Plan and the applicable Award. In no event may an Award be transferred by a grantee for value.


        (c)Family Member.Member. For purposes of Section 13(b)12(b), "family member"“family member” shall mean a grantee'sgrantee’s child, stepchild, grandchild, parent, stepparent, grandparent, spouse, former spouse, sibling, niece, nephew, mother-in-law,father-in-law,son-in-law,daughter-in-law,brother-in-law, or sister-in-law, including adoptive relationships, any person sharing the grantee'sgrantee’s household (other than a tenant of the grantee), a trust in which these persons (or the grantee) have more than 50 percent of the beneficial interest, a foundation in which these persons (or the grantee) control the management of assets, and any other entity in which these persons (or the grantee) own more than 50 percent of the voting interests.

        (d)Designation of Beneficiary.Beneficiary. To the extent permitted by the Company, each grantee to whom an Award has been made under the Plan may designate a beneficiary or beneficiaries to exercise any Award or receive any payment under any Award payable on or after the grantee'sgrantee’s death. Any such designation shall be on a form provided for that purpose by the Administrator and shall not be effective until received by the Administrator. If

      no beneficiary has been designated by a deceased grantee, or if the designated beneficiaries have predeceased the grantee, the beneficiary shall be the grantee'sgrantee’s estate.

              SECTION 14.    TAX WITHHOLDING 

              SECTION 15.

      SECTION 14.

      SECTION 409A AWARDS

      Awards are intended to be exempt from Section 409A AWARDS.

      to the greatest extent possible and to otherwise comply with Section 409A. The Plan and all Awards shall be interpreted in accordance with such intent. To the extent that any Award is determined to constitute "nonqualified“nonqualified deferred compensation"compensation” within the meaning of Section 409A (a "409A Award"“409A Award”), the Award shall be subject to such additional rules and requirements as specified by the Administrator from time to time in order to comply with Section 409A. In this regard, if any amount under a 409A Award is payable upon a "separation“separation from service"service” (within the meaning of Section 409A) to a grantee who is then considered a "specified employee"“specified employee” (within the meaning of Section 409A), then no such payment shall be made prior to the date that is the earlier of (i) six months and one day after the grantee'sgrantee’s separation from service, or (ii) the grantee'sgrantee’s death, but only to the extent such delay is necessary to prevent such payment from being subject to interest, penalties and/or additional tax imposed pursuant to Section 409A. Further, the settlement of any such409A Award may not be accelerated except to the extent permitted by Section 409A.


              SECTION 16.    TRANSFER, LEAVE OF ABSENCE, ETC. The Company makes no representation that any or all of the payments or benefits described in the Plan will be exempt from or comply with Section 409A and makes no undertaking to preclude Section 409A from applying to any such payment. The grantee shall be solely responsible for the payment of any taxes and penalties incurred under Section 409A.

      SECTION 15.

      TERMINATION OF SERVICE RELATIONSHIP, TRANSFER, LEAVE OF ABSENCE, ETC.

      (a) Termination of Service Relationship. If the grantee’s Service Relationship is with an Affiliate and such Affiliate ceases to be an Affiliate, the grantee shall be deemed to have terminated his or her Service Relationship for purposes of the Plan.

      (b) For purposes of the Plan, the following events shall not be deemed a termination of employment:a Service Relationship:

                (a)(i) a transfer to the employment of the Company from a Subsidiaryan Affiliate or from the Company to a Subsidiary,an Affiliate, or from one SubsidiaryAffiliate to another; or

              (b)

      (ii) an approved leave of absence for military service or sickness, or for any other purpose approved by the Company, if the employee'semployee’s right to re-employment is guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise so provides in writing.

              SECTION 17.    AMENDMENTS AND TERMINATION

       

      SECTION 16.

      AMENDMENTS AND TERMINATION

      The Board may, at any time, amend or discontinue the Plan and the Administrator may, at any time, amend or cancel any outstanding Award for the purpose of satisfying changes in law or for any other lawful purpose, but no such action shall materially and adversely affect rights under any outstanding Award without the holder'sholder’s consent. Except as provided in Section 3(d)3(b) or 3(e)3(c), without prior stockholder approval, in no event may the Administrator exercise its discretion to reduce the exercise price of outstanding Stock Options or Stock Appreciation Rights or effect repricing through cancellation and re-grants or cancellation of Stock Options or Stock Appreciation Rights in exchange for cash or other Awards. To the extent required under the rules of any securities exchange or market system on which the Stock is listed, to the extent determined by the Administrator to be required by the Code to ensure that Incentive Stock Options granted under the Plan are qualified under Section 422 of the Code, or to ensure that compensation earned under Awards qualifies as performance-based compensation under Section 162(m) of the Code, Plan amendments shall be subject to approval by the Company stockholders entitled to vote at a meeting of stockholders. Nothing in this Section 1716 shall limit the Administrator'sAdministrator’s authority to take any action permitted pursuant to Section 3(e)3(b) or 3(c).

              SECTION 18.    STATUS OF PLAN 

      SECTION 17.

      STATUS OF PLAN

      With respect to the portion of any Award that has not been exercised and any payments in cash, Stock or other consideration not received by a grantee, a grantee shall have no rights greater than those of a general creditor of the Company unless the Administrator shall otherwise expressly determine in connection with any Award or Awards. In its sole discretion, the Administrator may authorize the creation of trusts or other arrangements to meet the Company'sCompany’s obligations to deliver Stock or make payments with respect to Awards hereunder, provided that the existence of such trusts or other arrangements is consistent with the foregoing sentence.

              SECTION 19.    GENERAL PROVISIONS 


        Administrator deems such advice necessary or advisable), that the issuance and delivery of such certificates is in compliance with all applicable laws, regulations of governmental authorities and, if applicable, the requirements of any exchange on which the shares of Stock are listed, quoted or traded. AllAny Stock certificates deliveredissued pursuant to the Plan shall be subject to any stop-transfer orders and other restrictions as the Administrator deems necessary or advisable to comply with federal, state or foreign jurisdiction, securities or other laws, rules and quotation system on which the Stock is listed, quoted or traded. The Administrator may place legends on any Stock certificate or notations on any book entry to reference restrictions applicable to the Stock. In addition to the terms and conditions provided herein, the Administrator may require that an individual make such reasonable covenants, agreements, and representations

      as the Administrator, in its discretion, deems necessary or advisable in order to comply with any such laws, regulations, or requirements. The Administrator shall have the right to require any individual to comply with any timing or other restrictions with respect to the settlement or exercise of any Award, including a window-period limitation, as may be imposed in the discretion of the Administrator.

      (c)No Fractional Shares. No fractional shares of Stock shall be issued or delivered pursuant to the Plan or any Award, and the Administrator shall determine whether cash, other securities or other property shall be paid or transferred in lieu of any fractional shares, or whether such fractional shares or any rights thereto shall be canceled, terminated or otherwise eliminated.

      (d) Stockholder Rights.Rights. Until Stock is deemed delivered in accordance with Section 19(b)18(b), no right to vote or receive dividends or any other rights of a stockholder will exist with respect to shares of Stock to be issued in connection with an Award, notwithstanding the exercise of a Stock Option or any other action by the grantee with respect to an Award.

              (d)(e) Other Compensation Arrangements; No Employment Rights.Rights. Nothing contained in this Plan shall prevent the Board from adopting other or additional compensation arrangements, including trusts, and such arrangements may be either generally applicable or applicable only in specific cases. The adoption of this Plan and the grant of Awards do not confer upon any employee any right to continued employment with the Company or any Subsidiary.

              (e)(f) Trading Policy Restrictions.Restrictions. Option exercises and other Awards under the Plan shall be subject to the Company'sCompany’s insider trading policies and procedures, as in effect from time to time.

              (f)    Forfeiture(g) Clawback Policy. All Awards shall be subject to reduction, cancellation, forfeiture or recoupment to the extent necessary to comply with (i) any clawback, forfeiture or other similar policy adopted by the Board or Committee and as in effect from time to time; and (ii) applicable law. Further, to the extent that the grantee receives any amount in excess of Awardsthe amount that the grantee should otherwise have received under Sarbanes-Oxley Act.    If the Company isterms of the Award for any reason (including, without limitation, by reason of a financial restatement, mistake in calculations or other administrative error), the grantee shall be required to prepare an accounting restatement duerepay any such excess amount to the material noncompliance of the Company, as a result of misconduct, with any financial reporting requirement under the securities laws, then any grantee who is one of the individuals subject to automatic forfeiture under Section 304 of the Sarbanes-Oxley Act of 2002 shall reimburse the Company for the amount of any Award received by such individual under the Plan during the 12-month period following the first public issuance or filing with the United States Securities and Exchange Commission, as the case may be, of the financial document embodying such financial reporting requirement.

              SECTION 20.    EFFECTIVE DATE OF PLANCompany.

       

      SECTION 19.

      EFFECTIVE DATE OF PLAN

      This Plan as amended and restated, shall become effective upon stockholder approval byin accordance with applicable state law, the holdersCompany’s bylaws and articles of a majority of the votes cast at a meeting of stockholders at which a quorum is present.incorporation, and applicable stock exchange rules. No grants of Stock Options and other Awards may be made hereunder after the tenth anniversary of the Effective Date and no grants of Incentive Stock Options may be made hereunder after the tenth anniversary of the date the Plan as amended and restated, is approved by the Board.

              SECTION 21.    GOVERNING LAW 

      SECTION 20.

      GOVERNING LAW

      This Plan and all Awards and actions taken thereunder shall be governed by, and construed in accordance with, the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all other matters shall be governed by and construed in accordance with the internal laws of the State of Delaware, applied without regard to conflict of law principles.

      DATE APPROVED BY BOARD OF DIRECTORS: June 29, 2021

      DATE APPROVED BY STOCKHOLDERS:


      LOGO

      C/O BROADRIDGE P.O. BOX 1342 BRENTWOOD, NY 11717 Investor Address Line 1 Investor Address Line 2 Investor Address Line 3 Investor Address Line 4 Investor Address Line 5 John Sample 1234 ANYWHERE STREET ANY CITY, ON A1A 1A1 VOTE BY INTERNET - www.proxyvote.com Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. ET on 05/08/2019.July 29, 2021. Have your proxy card in hand when you access the web site, which will contain your voter control number, and follow the instructions to obtain your records and to create an electronic voting instruction form. ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS If you would like to reducerecords. VOTE BY INTERNET AT THE MEETING -www.virtualshareholdermeeting.com/PLUG2021 Attend the costs incurred by our company in mailing proxy materials, you can consent to receiving all future proxy statements, proxy cards and annual reports electronicallymeeting via e-mail or the Internet. To sign up for electronic delivery, please follow the instructions above to vote using the Internet and when prompted, indicate that you agree to receive or accessvote during the meeting by following the instructions on your proxy materials electronically in future years. C/O BROADRIDGE PO BOX 1342 BRENTWOOD, NY 11717card. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions. Vote by 11:59 P.M. ET on 05/08/2019.July 29, 2021. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.                TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THISONLYTHIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. For Withhold For All Except To withhold authority to vote for any individual nominee(s), mark “For All Except” and write the number(s) of the AllAllAll Except    The Board of Directors recommends you vote FOR the following: nominee(s) on the line below. 0 0 0 1. Election of Class III Directors    Nominees    01 George C. McNamee 02 Johannes M. Roth 03 Gregory L. Kenausis01) Andrew J. Marsh 02) Gary K. Willis 03) Maureen O. Helmer The Board of Directors recommends you vote FOR proposals 2, 3, 4 and 4. For 0 0 0 Against 0 0 0 Abstain 0 0 0 25. 2. The approval of anthe Fifth Certificate of Amendment and Restatement of the Company's Second Amended and Restated 2011Certificate of Incorporation of    the Company to increase the number of authorized shares of common stock from 750,000,000 shares to    1,500,000,000 shares as described in the proxy statement. 3. The approval of the Plug Power Inc. 2021 Stock Option and Incentive Plan.Plan as described in the proxy statement. 4. The approval of thenon-binding advisory resolution regarding the compensation of the Company'sCompany’s named    executive officers. 3 4officers as described in the proxy statement. 5. The ratification of KPMG LLP as the Company'sCompany’s independent auditorsregistered public accounting firm for 2019.2021. NOTE: Such other business as may properly come before the meeting or any adjournment thereof. 0 For address change/comments, mark here. (see reverseYou may attend and vote via the Internet during the Annual Meeting. See proxy statement for instructions) Please indicate if you plandetailed instructions on how to attend this meeting Yes 0 No 0register and attend.    Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date 0000415488_1 R1.0.1.18


      LOGO

      FOR SECURITY PURPOSES, PLEASE BRING A VALID PICTURE ID IF YOU PLAN TO ATTEND THE MEETING Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice &and Proxy Statement and Form 10-K is/are available at www.proxyvote.com    Annual Meeting of the Stockholders of PLUG POWER INC. May 9, 2019July 30, 2021 at 10:00 AM Eastern Time SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS    The stockholder(s) hereby acknowledges receipt of the Notice of Annual Meeting of Stockholders and Proxy Statement, each dated July 9, 2021, and hereby appoint(s) each of Andrew Marsh and Gerard L. Conway, Jr. as proxy, with the power to appoint his substitute, to represent and to vote all of the shares of Common Stockcommon stock of PLUG POWER INC. that the stockholder(s) is/are entitled to vote at the Annual Meeting of Stockholders to be held at 10:00 AM, Eastern Time on May 9, 2019,July 30, 2021, over the Internet at the offices of Goodwin Procter LLP, 620 Eighth Avenue, New York, NY 10018www.virtualshareholdermeeting.com/PLUG2021 and at any adjournment or postponement thereof, upon the matters set forth in the Notice of Annual Meeting of Stockholders and Proxy Statement dated April 5, 2019.July 9, 2021. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER DIRECTED BY THE UNDERSIGNED STOCKHOLDER. IF PROPERLY EXECUTED AND NO DIRECTION IS MADE, THIS PROXY WILL BE VOTED "FOR"“FOR” THE NOMINEES NAMED IN ITEM 1, "FOR"“FOR” THE APPROVAL OF ANTHE FIFTH CERTIFICATE OF AMENDMENT AND RESTATEMENT OF THE COMPANY'S SECOND AMENDED AND RESTATED 2011CERTIFICATE OF INCORPORATION OF THE COMPANY TO INCREASE THE AUTHORIZED SHARES OF COMMON STOCK FROM 750,000,000 SHARES TO 1,500,000,000 SHARES IN ITEM 2, “FOR” THE APPROVAL OF THE PLUG POWER INC. 2021 STOCK OPTION AND INCENTIVE PLAN IN ITEM 2, "FOR"3, “FOR” THE APPROVAL OF THENON-BINDING ADVISORY RESOLUTION REGARDING THE COMPENSATION OF THE COMPANY’S NAMED EXECUTIVE OFFICERS IN ITEM 3,4, AND "FOR"“FOR” THE RATIFICATION OF KPMG LLP AS THE COMPANY’S INDEPENDENT AUDITORSREGISTERED PUBLIC ACCOUNTING FIRM FOR 20192021 IN ITEM 4.5. THIS PROXY WILL BE VOTED IN THE DISCRETION OF THE PROXY ON ANY OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE MEETING. Address change/comments: (If you noted any Address Changes and/or Comments above, please mark corresponding box on the reverse side.) Continued and to be signed on reverse side 0000415488_2 R1.0.1.18



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      IMPORTANT NOTICE REGARDING THE AVAILABILITY OF PROXY MATERIALS FOR THE STOCKHOLDER MEETING TO BE HELD ON MAY 9, 2019
      IMPORTANT VOTING INFORMATION STOCKHOLDERS MAY REQUEST ELECTRONIC DELIVERY OF PROXY DOCUMENTS.
      INFORMATION REGARDING ADMISSION TO THE ANNUAL MEETING
      ABOUT THE ANNUAL MEETING
      PROPOSAL 1: ELECTION OF DIRECTORS
      Recommendation of the Board
      INFORMATION ABOUT OUR DIRECTORS
      COMMITTEES AND MEETINGS OF THE BOARD OF DIRECTORS
      INFORMATION ABOUT OUR EXECUTIVE OFFICERS
      EXECUTIVE COMPENSATION
      Option Exercises and Stock Vested—2018
      PROPOSAL 2: APPROVAL OF AN AMENDMENT AND RESTATEMENT OF THE COMPANY'S SECOND AMENDED AND RESTATED 2011 STOCK OPTION AND INCENTIVE PLAN
      Recommendation of the Board
      PROPOSAL 3: ADVISORY VOTE ON EXECUTIVE COMPENSATION
      Recommendation of the Board
      Recommendation of the Board
      CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
      PRINCIPAL STOCKHOLDERS
      SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE
      SUBMISSION OF STOCKHOLDER PROPOSALS FOR 2020 ANNUAL MEETING
      DELIVERY OF PROXY MATERIALS AND ANNUAL REPORT
      ANNUAL REPORT ON FORM 10-K
      PLUG POWER INC. THIRD AMENDED AND RESTATED 2011 STOCK OPTION AND INCENTIVE PLAN