Marsh Andrew

SEC source: 0001104659-26-113345 · tm2626923-1_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,699

Underlying: Common Stock · 101,699 shares

Expires 2036-09-30

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: Stock option issued pursuant to the previously disclosed Transitional Consulting Agreement, pursuant to which the Reporting Person is entitled to receive a quarterly equity award during the term of the agreement. The shares underlying this stock option shall vest in three equal annual installments commencing on the first anniversary of the grant date, subject to the Reporting Person's continued service through each applicable vesting date.

SEC source: 0001104659-26-080421 · tm2619696-1_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,469

Underlying: Common Stock · 72,469 shares

Expires 2036-06-30

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: Stock option issued pursuant to the previously disclosed Transitional Consulting Agreement, pursuant to which the Reporting Person is entitled to receive a quarterly equity award during the term of the agreement. The shares underlying this stock option shall vest in three equal annual installments commencing on the first anniversary of the grant date, subject to the Reporting Person's continued service through each applicable vesting date.

SEC source: 0001431827-26-000002 · wk-form4_1780090770.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 343,669

F1 · security: Represents restricted common stock that vests on the earlier to occur of (i) the next annual meeting of stockholders or (ii) the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of the vesting date.

SEC source: 0001104659-26-042129 · tm2611556-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 853,378

F1 · kind: Compensation awarded to directors pursuant to Plug Power Inc.'s Non-Employee Director Compensation Plan.

F2 · balance_after: The Reporting Person's total holdings were previously reported as 930,546 shares. Such amount was overstated because prior reports reflected gross shares of common stock received as compensation pursuant to the Reporting Person's election to receive shares in lieu of cash compensation rather than net shares received after withholding for taxes. The Reporting Person's holdings have been revised to reflect net shares received after withholding for taxes, resulting in a reduction of 80,856 shares to 849,690 shares. After giving effect to the transaction reported herein, the Reporting Person's total holdings are 853,378 shares. This correction relates solely to prior reporting and does not reflect any additional or previously unreported transactions by the Reporting Person.

SEC source: 0001104659-26-074765 · tm2617957-8_4seq1.xml · derivative · entry 2

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,260

Underlying: Common Stock · 87,260 shares

Expires 2036-03-31

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F3 · derivative.exercise_date: Stock option issued pursuant to the previously disclosed Transitional Consulting Agreement, pursuant to which the Reporting Person is entitled to receive a quarterly equity award during the term of the agreement. The shares underlying this stock option shall vest in three equal annual installments commencing on the first anniversary of the grant date, subject to the Reporting Person's continued service through each applicable vesting date.

SEC source: 0001104659-26-074765 · tm2617957-8_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,638

Underlying: Common Stock · 163,638 shares

Expires 2036-03-02

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: Stock option issued pursuant to the previously disclosed Non-Executive Chairman Agreement, pursuant to which the Reporting Person received an initial, one-time equity award. The shares underlying this stock option shall vest in full on March 2, 2027, subject to the Reporting Person's continued service on such vesting date.

SEC source: 0001104659-25-118176 · tm2532694-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 930,546

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-106321 · tm2530120-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 918,343

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-097520 · tm2528186-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 908,928

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-088376 · tm2525594-3_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,250,000

Underlying: Common Stock · 2,250,000 shares

Expires 2035-09-04

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: The shares underlying this stock option shall vest in three equal annual installments following the grant date, subject to the Reporting Person's continued service on each such vesting date.

SEC source: 0001104659-25-089663 · tm2526042-2_4seq1.xml · nonDerivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 890,604

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-089663 · tm2526042-2_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 872,133

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-068738 · tm2521163-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 852,165

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001104659-25-059344 · tm2517915-2_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 814,009

F1 · kind: Shares issued pursuant to a previously disclosed executive compensation program, pursuant to which the Reporting Person elected to receive payment of a portion of his base salary and bonus for the fiscal year ending December 31, 2025 in shares of the Issuer's common stock issued under the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The shares were fully vested upon grant.

SEC source: 0001415889-25-014645 · form4-05272025_100533.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,517

Underlying: Common Stock · 134,517 shares

Expires 2035-05-22

F1 · derivative.exercise_date: Represents stock options that vest on the earlier to occur of (i) the next annual meeting of stockholders or (ii) the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of the vesting date.

SEC source: 0001392380-24-000028 · wk-form4_1716929391.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 224,639

Underlying: Common Stock · 224,639 shares

Expires 2034-05-22

F1 · derivative.exercise_date: Represents stock options that vest on the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of the vesting date.

SEC source: 0001104659-24-054935 · tm2413131-1_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,500,000

Underlying: Common Stock · 1,500,000 shares

Expires 2031-04-26

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: The shares underlying this stock option shall vest in three equal annual installments following the grant date, subject to the Reporting Person's continued service on each such vesting date; provided, however, that 750,000 shares underlying such option shall vest only if the daily volume weighted average price of the Company's common stock during any 30 consecutive trading day period ("VWAP") equals or exceeds $7.50 prior to April 30, 2025.

SEC source: 0001104659-23-106509 · tm2327421-4_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 777,561

F1 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock awards.

F2 · price: Pursuant to the Plug Power Inc. Third Amended and Restated 2011 Stock Option and Incentive Plan, each share was tendered to Issuer at the price per share on the closing date of September 27, 2023.

SEC source: 0001392380-23-000086 · wk-form4_1692998458.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 273,669

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on September 20, 2022. The Reporting Person sold these shares, and intends to use the proceeds of this sale, in order to pay taxes resulting from the vesting of restricted common stock granted by the Issuer in connection with the Reporting Person's service as a director of the Issuer.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.36 to $1.42 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001392380-23-000042 · wk-form4_1686170781.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 290,419

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on September 20, 2022. The Reporting Person sold these shares, and intends to use the proceeds of this sale, in order to pay taxes resulting from the vesting of restricted common stock granted by the Issuer in connection with the Reporting Person's service as a director of the Issuer.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.54 to $1.545 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001392380-23-000039 · wk-form4_1685046352.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 304,369

F1 · security: Represents restricted common stock that vests on the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of the vesting date.

SEC source: 0001104659-23-066645 · tm2317471-2_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,500,000

Underlying: Common Stock · 1,500,000 shares

Expires 2030-05-18

F1 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F2 · derivative.exercise_date: Up to one-third (1/3) of the shares underlying the performance stock options will vest and become exercisable on each of the first three anniversaries of the grant date, provided that the daily volume weighted average price ("VWAP") of the Company's common stock during any 30 consecutive trading day period in the three year performance period following the grant date of the stock options equals or exceeds certain levels.

F3 · derivative.exercise_date: One-third (1/3) of the shares underlying the performance stock options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals $9.84; an additional one-third (1/3) of the shares underlying the options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals $11.81; and the remaining one-third (1/3) of the shares underlying the options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP during any 30 consecutive trading day period equals or exceeds $13.77.

F4 · derivative.exercise_date: There will be no interpolation for the performance stock option if the VWAP falls between any two stock price hurdles. Failure to achieve any of the stock price hurdles applicable to a performance stock option during the three-year performance period will result in applicable options being un-exercisable. The performance-based stock options have a maximum term of seven years from the grant date.

SEC source: 0001392380-22-000038 · wf-form4_166924309108774.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 203,562

F1 · kind: The sales reported were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person. The Reporting Person sold these shares, and intends to use the proceeds of this sale, in order to pay taxes resulting from the vesting of restricted common stock granted by the Issuer in connection with the Reporting Person's service as a director of the Issuer.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.990 to $2.155 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001104659-22-124241 · tm2231922-5_4seq1.xml · nonDerivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 874,453

F1 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock award.

F5 · price: Pursuant to the Plug Power Inc. Third Amended and Restated 2011 Stock Option and Incentive Plan, each share was tendered to Issuer at the price per share on the closing date of September 27, 2022, which is the date prior to the date withholding was effected.

SEC source: 0001104659-22-124241 · tm2231922-5_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 971,346

F1 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock award.

F2 · kind: The initial grant of the restricted stock award was reported on a Form 4 filed on August 21, 2019, but was inadvertently disclosed as a restricted stock unit award instead of a restricted stock award.

F3 · price: Pursuant to the Plug Power Inc. Third Amended and Restated 2011 Stock Option and Incentive Plan, each share was tendered to Issuer at the price per share on the closing date of August 18, 2022, which is the date prior to the date withholding was effected.

F4 · balance_after: The total Amount of Securities Beneficially Owned in Table I, Column 5 reflects the addition of 216,667 shares of the restricted stock award that was previously reported inadvertently on Table II as part of a grant of 650,000 restricted stock units on the Form 4 filed on August 21, 2019.

SEC source: 0001628280-22-016466 · wf-form4_165463480186927.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 245,466

F1 · security: Represents restricted common stock that vests on the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of the vesting date.

SEC source: 0001104659-22-054635 · tm2214070-4_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 859,048

F1 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock award. The initial grant of the restricted stock award was reported on a Form 4 filed on September 30, 2020, but was inadvertently described in the accompanying footnote as a restricted stock unit award instead of a restricted stock award.

SEC source: 0001104659-21-136332 · tm2131018-2_4seq1.xml · derivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,000,000

Underlying: Common Stock · 4,000,000 shares

Expires 2028-09-22

F1 · security: Awarded pursuant to Plug Power's 2021 Stock Option and Incentive Plan.

F2 · derivative.exercise_date: Up to one-third (1/3) of the shares underlying the performance stock options will vest and become exercisable on each of the first three anniversaries of the grant date, provided that the daily volume weighted average price of the Company's common stock during any 30 consecutive trading day period in the three year performance period following the grant date of the stock options ("VWAP") equals or exceeds certain levels. 25% of the shares underlying the performance stock option will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals or exceeds $35;

F3 · derivative.exercise_date: an additional 25% of the shares underlying the option will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals or exceeds $50; an additional 16.675% of the shares underlying the option will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals or exceeds $65; an additional 16.65% of the shares underlying the option will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals or exceeds $80; and the remaining 16.675% of the shares underlying the option will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals or exceeds $100.

F4 · derivative.exercise_date: There will be no interpolation for the performance stock option if the VWAP falls between any two stock price hurdles. Failure to achieve any of the stock price hurdles applicable to a performance stock option during the three-year performance period will result in the applicable options being un-exercisable. The performance-based stock options have a maximum term of seven years from the grant date.

SEC source: 0001104659-21-111564 · tm2126655-3_4seq1.xml · derivative · entry 3

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 166,667 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit is the equivalent of one share of Plug Power Inc. common stock.

F3 · derivative.exercise_date: On August 28, 2018, the Reporting Person was granted 500,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: On August 28, 2018, the Reporting Person was granted 500,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-21-111564 · tm2126655-3_4seq1.xml · nonDerivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 947,360

F2 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock unit awards.

SEC source: 0001104659-21-111564 · tm2126655-3_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,027,644

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit is the equivalent of one share of Plug Power Inc. common stock.

SEC source: 0001437749-21-020887 · rdgdoc.xml · derivative · entry 2

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,885

Underlying: Common Stock · 65,885 shares

Expires 2031-08-19

F2 · derivative.exercise_date: Represents stock options that vest in two equal annual installments beginning on the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of each vesting date.

SEC source: 0001437749-21-020887 · rdgdoc.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 218,113

F1 · security: Represents restricted common stock that vests in two equal annual installments beginning on the first anniversary of the grant date, provided that the reporting person remains in continuous service with the issuer as of each vesting date.

SEC source: 0001104659-21-108696 · tm2125715-3_4seq1.xml · derivative · entry 3

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 216,667

Underlying: Common Stock · 216,666 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each restricted stock unit is the equivalent of one share of Plug Power Inc. common stock.

F3 · derivative.exercise_date: On August 19, 2019, the Reporting Person was granted 650,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

F3 · derivative.expiration_date: On August 19, 2019, the Reporting Person was granted 650,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-21-108696 · tm2125715-3_4seq1.xml · nonDerivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 860,977

F2 · kind: Tendered to Issuer to satisfy tax withholding obligations of the Reporting Person incurred in connection with the vesting of the Reporting Person's restricted stock unit awards.

SEC source: 0001104659-21-108696 · tm2125715-3_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 965,346

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each restricted stock unit is the equivalent of one share of Plug Power Inc. common stock.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · derivative · entry 11

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 466,668 shares

Expires 2027-08-31

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_date: The stock option granted to the reporting person is fully vested and exercisable as of the date hereof.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · derivative · entry 10

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 106,600 shares

Expires 2021-04-13

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · derivative.exercise_price: This option was previously reported as covering 1,066,000 shares at an exercise price of $0.61 per share, but was adjusted to reflect a 1-for-10 reverse stock split that occurred on May 19, 2011.

F9 · shares: This option was previously reported as covering 1,066,000 shares at an exercise price of $0.61 per share, but was adjusted to reflect a 1-for-10 reverse stock split that occurred on May 19, 2011.

F10 · derivative.exercise_date: The stock option granted to the reporting person is fully vested and exercisable as of the date hereof.

F9 · derivative.underlying_shares: This option was previously reported as covering 1,066,000 shares at an exercise price of $0.61 per share, but was adjusted to reflect a 1-for-10 reverse stock split that occurred on May 19, 2011.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 9

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 748,680

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.26 to $68.43, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 8

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 753,858

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.26 to $68.2504, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 7

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 855,624

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.26 to $67.25, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 6

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 988,377

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.26 to $66.25, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 5

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,102,497

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.26 to $65.25, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 4

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,258,548

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.26 to $64.25, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 3

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,308,466

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.25 to $63.23, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,321,948

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-21-006361 · tm213809-1_4seq1.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 855,280

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001104659-20-110506 · a4.xml · derivative · entry 3

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 225,000

Underlying: Common Stock · 225,000 shares

Expires 2030-09-28

F2 · kind: Awarded pursuant to the Issuer's 2011 Stock Option and Incentive Plan.

F4 · derivative.exercise_date: On September 28, 2020, the Reporting Person was granted 225,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-110506 · a4.xml · derivative · entry 2

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 225,000

Underlying: Common Stock · 225,000 shares

Expires 2030-09-28

F2 · kind: Awarded pursuant to the Issuer's 2011 Stock Option and Incentive Plan.

F3 · derivative.exercise_date: On September 28, 2020, the Reporting Person was granted 225,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-110506 · a4.xml · nonDerivative · entry 1

Marsh Andrew · CIK 0001431827 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 748,680

F1 · kind: Consists of a restricted stock unit award made pursuant to the Issuer's 2011 Stock Option and Incentive Plan. The restricted stock units vest in three substantially equal installments beginning on the first anniversary of the grant date.