Plug Power director granted stock and options

PLUG POWER INC director Gary K. Willis received new equity compensation.

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Form Type

Rhea-AI Filing Summary

PLUG POWER INC director Gary K. Willis received new equity compensation. He was granted 39,753 shares of restricted common stock and a stock option for 39,753 shares at an exercise price of $2.83 per share. Both awards were made under Plug Power’s 2021 Stock Option and Incentive Plan and its Non-Employee Director Compensation Plan.

The restricted stock and the options each vest in full on the first anniversary of the June 11, 2026 grant date, conditioned on his continued service as a director. Following the restricted stock grant, Willis directly holds 730,107 common shares, and holds the newly granted option for 39,753 shares expiring on June 11, 2036.

Insider Trade Summary

Grant/Award: 79,506 shares

Grant/Award 2 txns

Insider WILLIS GARY K

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	39,753	$0.00	$0.00
Grant/Award	Common Stock	39,753	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 39,753 contracts (Direct); Common Stock — 730,107 shares (Direct)

Footnotes (3)

F1. Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan. The restricted stock shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.
F2. Stock option granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan.
F3. The options shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

Key Figures

Restricted stock grant: 39,753 shares Stock option grant size: 39,753 shares Option exercise price: $2.83 per share +3 more

6 metrics

Restricted stock grant 39,753 shares Non-employee director award on June 11, 2026

Stock option grant size 39,753 shares Director option granted on June 11, 2026

Option exercise price $2.83 per share Stock Option (Right to Buy) for Plug Power common stock

Option expiration June 11, 2036 Expiration date of newly granted director stock option

Common shares held after grant 730,107 shares Total Plug Power common stock directly held by Willis after award

Option shares following transaction 39,753 option shares Total option position from this grant after transaction

Key Terms

restricted stock award, Plug Power Inc. 2021 Stock Option and Incentive Plan, Non-Employee Director Compensation Plan, Stock Option (Right to Buy), +1 more

5 terms

restricted stock award financial

"Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

Plug Power Inc. 2021 Stock Option and Incentive Plan financial

"made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended"

Non-Employee Director Compensation Plan financial

"in accordance with the Non-Employee Director Compensation Plan"

Stock Option (Right to Buy) financial

"Stock Option (Right to Buy)"

vest in full on the first anniversary of the grant date financial

"The restricted stock shall vest in full on the first anniversary of the grant date"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did PLUG director Gary K. Willis report on this Form 4?

Gary K. Willis reported receiving equity awards from Plug Power as director compensation. He was granted 39,753 restricted shares and a stock option for 39,753 shares, both awarded under the company’s 2021 Stock Option and Incentive Plan and director compensation plan.

How many Plug Power (PLUG) shares did Gary K. Willis receive as restricted stock?

Gary K. Willis received a restricted stock award covering 39,753 Plug Power common shares. This grant is part of the Non-Employee Director Compensation Plan and vests fully on the first anniversary of the grant date, subject to his continued board service through that vesting date.

What are the terms of Gary K. Willis’s new Plug Power stock option grant?

Willis received a stock option for 39,753 Plug Power common shares with an exercise price of $2.83 per share. The option was granted under the 2021 Stock Option and Incentive Plan and vests fully after one year, expiring on June 11, 2036 if not exercised earlier.

When do Gary K. Willis’s new Plug Power restricted stock and options vest?

Both the restricted stock and the stock options granted to Gary K. Willis vest in full on the first anniversary of the grant date. Vesting is conditioned on his continued service as a Plug Power non-employee director on that one-year vesting date, as described in the footnotes.

How many Plug Power shares does Gary K. Willis hold after this Form 4 transaction?

After receiving the restricted stock grant, Gary K. Willis directly holds 730,107 Plug Power common shares. In addition, he holds a newly granted stock option for 39,753 shares, giving him further potential equity exposure if he exercises the option in the future.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 06/16/2026 - 06:45 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

WILLIS GARY K

(Last)

(First)

(Middle)

C/O PLUG POWER INC.

125 VISTA BOULEVARD

(Street)

SLINGERLANDS

NEW YORK

12159

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
PLUG POWER INC [ PLUG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/11/2026		A		39,753⁽¹⁾	A	$0.00	730,107	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)⁽²⁾	$2.83	06/11/2026		A		39,753		⁽³⁾	06/11/2036	Common Stock	39,753	$0	39,753	D

Explanation of Responses:

1. Consists of a restricted stock award made pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan. The restricted stock shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

2. Stock option granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan, as amended, in accordance with the Non-Employee Director Compensation Plan.

3. The options shall vest in full on the first anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

	/s/ Gerard L. Conway Jr., Attorney-in-Fact	06/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR