Plug Power director plans sale of 44,957 shares

A PLUG POWER INC director filed a Rule 144 notice to potentially sell 44,957 vested restricted shares through a broker.

Available on EDGAR 09/09/2026 - 04:21 PM EDT Accepted by SEC EDGAR 09/09/2026 - 04:20 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

PLUG POWER INC received a notice that director Colin Angle intends to sell common stock under Rule 144. The notice covers 44,957 shares of PLUG common stock with an aggregate market value of $101,602.82, to be sold through Morgan Stanley Smith Barney LLC on or after September 9, 2026.

The shares were acquired from the issuer upon vesting of restricted stock awards during the period from September 30, 2024 through July 3, 2026.

Key Figures

Shares intended for sale: 44,957 shares Aggregate market value: $101,602.82 Planned sale date: September 9, 2026 +2 more

5 metrics

Shares intended for sale 44,957 shares Common stock covered by the Rule 144 notice

Aggregate market value $101,602.82 Value of 44,957 PLUG common shares covered by the notice

Planned sale date September 9, 2026 Date associated with the proposed Rule 144 sale on NASDAQ

Acquisition period start September 30, 2024 Start of vesting period for restricted stock awards

Acquisition period end July 3, 2026 End of vesting period for restricted stock awards

Key Terms

Rule 144, Restricted Stock Awards, aggregate market value, CUSIP

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Awards financial

"The securities to be sold were acquired upon the vesting of restricted stock awards"

Restricted stock awards are company shares given to employees or executives that cannot be sold or transferred until certain conditions — like staying with the company for a set time or meeting performance targets — are met, like a gift that is locked in a safe until rules are satisfied. Investors care because these awards tie management’s pay to company performance, can increase the number of shares outstanding when they become tradable (dilution), and may signal expected future selling pressure or commitment to long-term growth.

aggregate market value financial

"44957 | 101602.82 | 1397195278 | 09/09/2026 | NASDAQ"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

CUSIP financial

"44957 | 101602.82 | 1397195278 | 09/09/2026 | NASDAQ"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

FAQ

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

What does the Form 144 filing mean for PLUG stock (PLUG)?

The filing states that a PLUG director, Colin Angle, intends to sell 44,957 shares of common stock under Rule 144, with an aggregate market value of $101,602.82, through Morgan Stanley Smith Barney LLC on or after September 9, 2026.

How many PLUG POWER INC (PLUG) shares are covered by this Form 144?

The notice covers 44,957 shares of PLUG POWER INC common stock. These shares are eligible to be sold under Rule 144, subject to applicable volume and other limitations described in that rule.

What is the approximate value of the PLUG shares in this Form 144?

The filing lists an aggregate market value of $101,602.82 for the 44,957 shares of PLUG common stock intended for sale under Rule 144.

Who is selling PLUG POWER INC (PLUG) shares under this Form 144?

The person for whose account the securities are to be sold is Colin Angle, identified as a director of PLUG POWER INC. The shares will be sold through Morgan Stanley Smith Barney LLC Executive Financial Services.

How and when were the PLUG (PLUG) shares in this Form 144 acquired?

The filing explains that the securities to be sold were acquired from PLUG POWER INC upon the vesting of restricted stock awards during the period from September 30, 2024 through July 3, 2026.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001341689
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	PLUG POWER INC.
SEC File Number	001-34392
Address of Issuer	125 Vista Boulevard Slingerlands NEW YORK 12159
Phone	5187827700
Name of Person for Whose Account the Securities are To Be Sold	COLIN ANGLE
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	44957	101602.82	1397195278	09/09/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/30/2024	Restricted Stock Awards	Issuer			44957	09/30/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock awards during the period of 09/30/2024 through 07/03/2026.
Date of Notice	09/09/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/10/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Colin Angle
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)