X0609 4 2026-06-11 0 0001093691 PLUG POWER INC PLUG 0001008001 MCNAMEE GEORGE C false C/O PLUG POWER INC. 125 VISTA BOULEVARD SLINGERLANDS NY 12159 1 0 0 0 0 Common Stock 2026-06-11 4 A 0 39753 0.00 A 873282 D Common Stock 300000 I See Footnote Stock Option (Right to Buy) 2.83 2026-06-11 4 A 0 39753 0 A 2036-06-11 Common Stock 39753 39753 D 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. Shares held by The McNamee Family Irrevocable Trust of 2020, for which the Reporting Person serves as trustee. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein. 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. /s/ Gerard L. Conway Jr., Attorney-in-Fact 2026-06-16