X0201 4 2003-08-04 0 0001009759 CAPSTONE TURBINE CORP cpst 0001257565 TUCKER JOHN R 21211 NORDHOFF STREET CHATSWORTH CA 91311 1 1 0 0 President and CEO Common Stock 2003-08-04 4 A 0 500000 0.001 A 500000 D Stock Option (Right to Buy) 1.18 2003-08-01 4 A 0 2000000 0 A 2004-08-01 2013-08-01 Common Stock 2000000 2000000 D 25% of the options vest on this date; and 1/48th of the shares subject to the option vest monthly thereafter, provided, however, if Mr. Tucker is terminated by the Company other than for Cause (as such term is defined in the 2000 Plan) prior to the one-year anniversary of the date of grant, 1/48th of the shares subject to this option grant shall be deemed to have vested on the one-month anniversary of the Date of Grant and on each monthly anniversary thereafter until the date of such termination. John R. Tucker 2003-08-04