MIDDLETON PAUL B

SEC source: 0001104659-26-078982 · tm2619323-4_4seq1.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 510,204

Underlying: Common Stock · 510,204 shares

Expires 2036-06-25

F3 · security: Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.

F4 · 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: 0001104659-26-078982 · tm2619323-4_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,947,169

F1 · kind: Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The restricted 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: 0001104659-25-057705 · tm2517519-1_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,558,064

SEC source: 0001104659-25-050252 · tm2515537-1_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,908,064

SEC source: 0001104659-25-045520 · tm2514240-1_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,558,064

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. 2021 Stock Option and Incentive Plan, as amended, each share was tendered to Issuer at the price per share on the closing date of May 2, 2025.

SEC source: 0001104659-24-122651 · tm2429519-1_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,575,145

F1 · kind: Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The restricted stock vests in three equal annual installments on the first, second and third anniversaries of the grant date, subject to the Reporting Person's continued service on each such vesting date.

SEC source: 0001104659-24-115927 · tm2427931-3_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 273,061

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. 2021 Stock Option and Incentive Plan, as amended, each share was tendered to Issuer at the price per share on the closing date of November 5, 2024.

SEC source: 0001104659-24-087835 · tm2421321-3_4seq1.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 290,143

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.

F3 · price: Pursuant to the Plan, each share was tendered to Issuer at the price per share on the closing date of August 7, 2024.

SEC source: 0001104659-24-060597 · tm2414304-2_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 324,306

F1 · kind: Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended. The restricted stock vests as follows: 25% of the shares were immediately vested upon grant, and the remaining shares shall vest in equal installments on each of August 8, 2024, November 6, 2024 and May 5, 2025, subject to the Reporting Person's continued service on each such vesting date.

SEC source: 0001104659-24-087835 · tm2421321-3_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 307,224

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. 2021 Stock Option and Incentive Plan, as amended (the "Plan"), each share was tendered to Issuer at the price per share on the closing date of May 8, 2024.

SEC source: 0001104659-24-054949 · tm2413131-2_4seq1.xml · derivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 750,000

Underlying: Common Stock · 750,000 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 375,000 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: 0001104659-23-106507 · tm2327421-5_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 205,172

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: 0001104659-23-066660 · tm2317471-7_4seq1.xml · derivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 750,000

Underlying: Common Stock · 750,000 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: 0001104659-22-124244 · tm2231922-6_4seq1.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 243,406

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: 0001104659-22-124244 · tm2231922-6_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 281,639

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 83,333 shares of the restricted stock award that was previously reported inadvertently on Table II as part of 250,000 restricted stock units on the Form 4 filed on August 21, 2019.

SEC source: 0001104659-22-054637 · tm2214070-5_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 246,098

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: 0001104659-21-136335 · tm2131018-3_4seq1.xml · derivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,000,000

Underlying: Common Stock · 2,000,000 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 options will be deemed to have satisfied the performance-based vesting and will be eligible to vest over time if the VWAP equals $35; an additional 25% 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 equals $50; and the remaining 50% of the shares underlying the options will be deemed to have satisfied the performancebased vesting and will be eligible to vest over time if the VWAP equals or exceeds $100.

F3 · derivative.exercise_date: If the VWAP falls between two of the stock price hurdles, an incremental number of shares underlying the options will become exercisable based on linear interpolation in $1 increments. 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: 0001104659-21-111565 · tm2126655-4_4seq1.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 66,667 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 200,000 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 200,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-21-111565 · tm2126655-4_4seq1.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 278,065

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: 0001104659-21-111565 · tm2126655-4_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 310,032

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: 0001104659-21-108699 · tm2125715-5_4seq1.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,333

Underlying: Common Stock · 83,334 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 250,000 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 250,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-21-108699 · tm2125715-5_4seq1.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 243,365

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: 0001104659-21-108699 · tm2125715-5_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 283,324

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: 0001104659-20-139755 · tm2039429-1_4seq1.xml · derivative · entry 7

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,667

Underlying: Common Stock · 133,333 shares

Expires 2028-08-28

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.

F5 · derivative.exercise_date: On August 28, 2018, the Reporting Person was granted 200,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-139755 · tm2039429-1_4seq1.xml · derivative · entry 6

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,333

Underlying: Common Stock · 41,667 shares

Expires 2029-08-19

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.

F4 · derivative.exercise_date: On August 19, 2019, the Reporting Person was granted 125,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-139755 · tm2039429-1_4seq1.xml · derivative · entry 5

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,333

Underlying: Common Stock · 41,667 shares

Expires 2029-08-19

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.

F3 · derivative.exercise_date: On August 19, 2019, the Reporting Person was granted 125,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-139755 · tm2039429-1_4seq1.xml · nonDerivative · entry 4

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 199,990

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan effective as of September 2, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.03 to $35.73, 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: 0001104659-20-139755 · tm2039429-1_4seq1.xml · nonDerivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 416,657

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: 0001104659-20-139755 · tm2039429-1_4seq1.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 283,324

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: 0001104659-20-139755 · tm2039429-1_4seq1.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 241,657

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: 0001104659-20-114910 · a4.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 550,000 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.

F3 · derivative.exercise_date: The stock option granted to the Reporting Person is fully vested and exercisable as of the date hereof.

SEC source: 0001104659-20-114910 · a4.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 199,990

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan effective as of September 2, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.89, 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: 0001104659-20-114910 · a4.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 897,056

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: 0001104659-20-110508 · a4.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 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 100,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-110508 · a4.xml · derivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 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 100,000 stock options, vesting in three substantially equal installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-110508 · a4.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 347,056

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.

SEC source: 0001104659-20-101453 · a4.xml · derivative · entry 6

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,667

Underlying: Common Stock · 66,666 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.

F4 · derivative.exercise_date: On August 28, 2018, the Reporting Person was granted 200,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

F4 · derivative.expiration_date: On August 28, 2018, the Reporting Person was granted 200,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-101453 · a4.xml · nonDerivative · entry 4

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 147,056

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: 0001104659-20-101453 · a4.xml · nonDerivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 179,023

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: 0001104659-20-101453 · a4.xml · derivative · entry 5

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,667

Underlying: Common Stock · 83,333 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 250,000 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 250,000 restricted stock units, vesting in three substantially equal annual installments beginning on the first anniversary of the grant date.

SEC source: 0001104659-20-101453 · a4.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 112,357

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: 0001104659-20-101453 · a4.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 152,316

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: 0001104659-20-093890 · a4.xml · derivative · entry 5

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 300,000 shares

Expires 2026-08-09

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.

F3 · derivative.exercise_date: The stock option granted to the reporting person is fully vested and exercisable as of the date hereof.

SEC source: 0001104659-20-093890 · a4.xml · derivative · entry 4

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 250,000 shares

Expires 2025-07-23

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.

F3 · derivative.exercise_date: The stock option granted to the reporting person is fully vested and exercisable as of the date hereof.

SEC source: 0001104659-20-093890 · a4.xml · nonDerivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,983

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan effective as of June 11, 2020.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.00 to $12.01, 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: 0001104659-20-093890 · a4.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 618,983

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: 0001104659-20-093890 · a4.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,983

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: 0001104659-20-082062 · a4.xml · derivative · entry 3

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 250,000 shares

Expires 2024-12-01

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.

F2 · derivative.exercise_date: The stock option granted to the reporting person is fully vested and exercisable as of the date hereof.

SEC source: 0001104659-20-082062 · a4.xml · nonDerivative · entry 2

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,983

F1 · kind: Shares sold pursuant to a pre-established 10b5-1 trading plan effective as of June 11, 2020.

SEC source: 0001104659-20-082062 · a4.xml · nonDerivative · entry 1

MIDDLETON PAUL B · CIK 0001224978 · CFO & Senior VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,983

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.