Marsh Andrew 4

4 · PLUG POWER INC · Filed Jun 16, 2026

AI-generated summary of this filing

Updated Jun 16, 2026

PLUG Director Andrew Marsh Receives Equity Awards

What Happened

Andrew Marsh, a director of Plug Power Inc. (PLUG), was granted two derivative equity awards in March 2026: 163,638 option shares on March 2, 2026, and 87,260 option shares on March 31, 2026 (total 250,898). Each grant is reported at $0.00 (typical for stock option or award grants) — these are awards, not open-market purchases or sales.

Key Details

Transaction dates and reported prices: Mar 2, 2026 — 163,638 shares @ $0.00 (award); Mar 31, 2026 — 87,260 shares @ $0.00 (award).
Transaction type: A = Award/Grant (derivative awards / stock options), not an immediate sale or cash purchase.
Shares owned after transaction: Not specified in the excerpted filing.
Footnotes of note:
- F1: Awards granted under Plug Power’s 2021 Stock Option & Incentive Plan.
- F2: The Mar 2 award was issued under a Non‑Executive Chairman Agreement as a one‑time stock option; underlying shares vest in full on March 2, 2027, subject to continued service.
- F3: The Mar 31 award was issued under a Transitional Consulting Agreement as a quarterly equity award; underlying shares vest in three equal annual installments beginning on the first anniversary of the grant, subject to continued service.
Filing timeliness: The Form 4 was filed on 2026-06-16 covering a reportable transaction on 2026-03-02 and 2026-03-31 — this is later than the usual two-business-day filing window (i.e., late).

Context

These entries are derivative awards (stock options/awards) with vesting schedules; they do not represent immediate sales or purchases of common stock and therefore do not provide an immediate change in market exposure. Vesting conditions tie future ownership to continued service, so the awards only convert to actual shares over time if Marsh remains in service and any vesting conditions are met.

Form 4

Period: 2026-03-02

Director

Transactions

Award
Stock Option (Right to Buy)
[F1][F2]
2026-03-02+163,638→ 163,638 total
Exercise: $1.81Exp: 2036-03-02→ Common Stock (163,638 underlying)
Award
Stock Option (Right to Buy)
[F1][F3]
2026-03-31+87,260→ 87,260 total
Exercise: $2.26Exp: 2036-03-31→ Common Stock (87,260 underlying)

Footnotes (3)

[F1]Awarded pursuant to Plug Power Inc.'s 2021 Stock Option and Incentive Plan, as amended.
[F2]Stock option issued pursuant to the previously disclosed Non-Executive Chairman Agreement, pursuant to which the Reporting Person received an initial, one-time equity award. The shares underlying this stock option shall vest in full on March 2, 2027, subject to the Reporting Person's continued service on such vesting date.
[F3]Stock option issued pursuant to the previously disclosed Transitional Consulting Agreement, pursuant to which the Reporting Person is entitled to receive a quarterly equity award during the term of the agreement. The shares underlying this stock option shall vest in three equal annual installments commencing on the first anniversary of the grant date, subject to the Reporting Person's continued service through each applicable vesting date.

Signature

/s/ Gerard L. Conway, Jr., Attorney-in-Fact|2026-06-16

1 file