[Form 4] PLUG POWER INC Insider Trading Activity

Rhea-AI Filing Summary

PLUG POWER INC director Colin M. Angle reported equity awards tied to his board service. He received a grant of 39,753 shares of restricted common stock under the company’s 2021 Stock Option and Incentive Plan and Non-Employee Director Compensation Plan.

Angle also received stock options for 39,753 shares of common stock at an exercise price of $2.83 per share, expiring on June 11, 2036. Both the restricted stock and options vest in full on the first anniversary of the June 11, 2026 grant date, subject to his continued service. Following the grant, he directly holds 149,544 shares of common stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Angle Colin M

Role null

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

Holdings After Transaction: Stock Option (Right to Buy) — 39,753 shares (Direct, null); Common Stock — 149,544 shares (Direct, null)

Footnotes (1)

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. 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. 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.

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Form 4 Insider Transactions: What Each Field Means →

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^*

Angle Colin M

(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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/11/2026		A		39,753(1)	A	$0.00	149,544	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
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)

FAQ

What insider transactions did PLUG director Colin M. Angle report?

Colin M. Angle reported receiving equity awards as a director. He was granted 39,753 restricted shares of Plug Power common stock and stock options for 39,753 shares, all as compensation under the non-employee director plans, not open-market purchases or sales.

How many Plug Power (PLUG) shares does Colin M. Angle hold after this Form 4?

After these awards, Colin M. Angle holds 149,544 Plug Power shares directly. This total reflects his updated common stock position following the grant of 39,753 restricted shares reported in the Form 4 filing.

What are the key terms of Colin M. Angle’s Plug Power stock options?

Angle’s stock options cover 39,753 Plug Power shares at $2.83 per share. The options were granted on June 11, 2026, expire on June 11, 2036, and will vest in full one year after the grant date if he continues serving as a director.

When do Colin M. Angle’s Plug Power restricted stock and options vest?

Both the restricted stock and options vest one year after the grant date. The awards will fully vest on the first anniversary of June 11, 2026, provided Angle continues to serve as a Plug Power non-employee director through that vesting date.

Are Colin M. Angle’s Plug Power equity awards part of a compensation plan?

Yes, the awards are made under Plug Power’s director compensation framework. The restricted stock and options were granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan and the Non-Employee Director Compensation Plan.