X0303 4/A 2010-02-08 2010-02-19 0 0001093691 PLUG POWER INC PLUG 0001308706 Conway Gerard L JR 968 ALBANY-SHAKER ROAD LATHAM NY 12110 0 1 0 0 General Counsel Plug Power Common Stock 2010-02-08 4 F 0 28974 0.54 D 105809 D This Amendment is being filed to more accurately describe in this footnote the transaction by which the shares were disposed. The number of shares provided in Column 4 represent the shares withheld from officers in total value equal to the amount necessary to fund the payment of taxes due upon the receipt of restricted stock grant award. The Company pays this tax amount in cash and shares representing this amount are either retained in or deposited in the Company's treasury. /s/ Gerard L. Conway, Jr., Attorney in Fact 2010-03-26