STOCK TITAN

Plug Power (PLUG) director receives stock and option grants in new filing

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Plug Power Inc. director Maureen O. Helmer received new equity compensation. She was granted 39,753 shares of common stock as a restricted stock award and 39,753 stock options with an exercise price of $2.83 per share under Plug Power’s 2021 Stock Option and Incentive Plan.

The restricted stock and options each vest in full on the first anniversary of the June 11, 2026 grant date, contingent on her continued board service. After this award, she directly owns 361,318 shares of common stock and holds 39,753 stock options.

Positive

  • None.

Negative

  • None.
Insider HELMER MAUREEN O
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 — 361,318 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.
Restricted stock grant 39,753 shares Common stock award to Maureen Helmer on June 11, 2026
Stock options granted 39,753 options Right to buy Plug Power common stock
Option exercise price $2.83 per share Strike price for Helmer’s June 11, 2026 option grant
Option expiration date June 11, 2036 End of exercise period for granted options
Shares owned after grant 361,318 shares Helmer’s direct Plug Power common stock holdings post-grant
Options held after grant 39,753 options Total options from this reported grant
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.
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 financial
"Stock option granted pursuant to the Plug Power Inc. 2021 Stock Option and Incentive Plan"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
vesting financial
"The options shall vest in full on the first anniversary of the grant date"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
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SEC Form 4
FORM 4UNITED 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*
HELMER MAUREEN O

(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock06/11/2026A39,753(1)A$0.00361,318D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)(2)$2.8306/11/2026A39,753 (3)06/11/2036Common Stock39,753$039,753D
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-Fact06/16/2026
** Signature of Reporting PersonDate
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 did Plug Power (PLUG) director Maureen Helmer acquire in this Form 4?

Maureen Helmer received equity compensation, not an open-market purchase. She was granted 39,753 restricted shares of Plug Power common stock and 39,753 stock options, all under the company’s 2021 Stock Option and Incentive Plan for non-employee directors.

What is the exercise price of Maureen Helmer’s Plug Power (PLUG) stock options?

The granted stock options have an exercise price of $2.83 per share. This means Helmer can buy Plug Power common shares at $2.83 if she exercises the options after they vest and before they expire, subject to the plan’s terms.

When do Maureen Helmer’s new Plug Power (PLUG) awards vest?

Both the 39,753 restricted shares and 39,753 stock options vest in full on the first anniversary of the grant date. Vesting is contingent on Helmer’s continued service as a non-employee director through that one-year vesting date.

How many Plug Power (PLUG) shares does Maureen Helmer hold after this Form 4?

After the reported transactions, Helmer directly holds 361,318 shares of Plug Power common stock. In addition, she holds 39,753 stock options granted on the same date, which are scheduled to vest in full after one year of continued service.

When do Maureen Helmer’s Plug Power (PLUG) stock options expire?

The stock options granted to Helmer are scheduled to expire on June 11, 2036. She can generally exercise them between vesting on the first anniversary of the grant date and that expiration date, subject to the plan and award agreement conditions.

Is Maureen Helmer’s Plug Power (PLUG) Form 4 a market buy or sell?

The Form 4 reports compensation grants, not market trades. Helmer acquired restricted shares and stock options at a stated price of $0.00 per share as part of Plug Power’s non-employee director compensation plan, rather than buying or selling on the open market.