Paul B. Middleton - 25 Jun 2026 Form 4 Insider Report for PLUG POWER INC (PLUG)

Reporting relationship: CFO & Executive VP
Issuer ticker: PLUG
Reported as of: 25 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 29 Jun 2026, 19:17:21 UTC
Prior SEC filing: 09 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Gerard L. Conway, Jr., Attorney-in-Fact

Key filing fact

Paul B. Middleton filed Form 4 for PLUG POWER INC (PLUG) on 29 Jun 2026.

Key facts

This page summarizes Paul B. Middleton's Form 4 filing for PLUG POWER INC (PLUG).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 29 Jun 2026, 19:17.

Change

Previous filing in this sequence was filed on 09 Jun 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001224978 Primary reporting owner

MIDDLETON PAUL B

Relationship: CFO & Executive VP
Address: C/O PLUG POWER INC., 125 VISTA BOULEVARD, SLINGERLANDS
Signature: /s/ Gerard L. Conway, Jr., Attorney-in-Fact
Signature date: 29 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PLUG transaction

Common Stock

Award

Transaction value
Shares: +389,105
Change %: +15%
Price: $0.000000^*
Shares after: 2,947,169
Date: 25 Jun 2026
Ownership: Direct
Footnotes: F1

PLUG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 64,492
Date: 25 Jun 2026
Ownership: 401(k) Plan
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

PLUG transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value
Shares: +510,204
Change %
Price: $0.000000^*
Shares after: 510,204
Date: 25 Jun 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 510,204
Exercise price: $2.57
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

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.

Footnote F2

The Reporting Person holds 64,492 shares of common stock in Plug Power Inc.'s 401(k) plan. The information in this report is based on a plan statement as of June 29, 2026.

Footnote F3

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

Footnote F4

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.