X0202 4 2007-05-18 0000040888 GENCORP INC GY 0001212523 OSTERHOFF JAMES M HIGHWAY 50 & AEROJET ROAD RANCHO CORDOVA CA 95742 1 0 0 0 Phantom Stock Unit 0 2007-05-18 4 D 0 2316.463 13.49 D Common Stock 2316.463 18531.707 D These Derivative Securities are Phantom Stock Units in the GenCorp Deferred Compensation Plan for Nonemployee Directors. The Phantom Stock Units are payable in cash upon a future date elected by the Director at the time of deferral, based upon the market value of GenCorp common shares at the time of payment. Therefore there is no Expiration Date for these Derivative Securities. These Derivative Securities are Phantom Stock Units in the GenCorp Deferred Compensation Plan for Nonemployee Directors. The Phantom Stock Units are payable in cash upon a future date elected by the Director at the time of deferral, based upon the market value of GenCorp common shares at the time of payment. Therefore there is no Date Exercisable for these Derivative Securities. Phantom stock units settled in cash pursuant to payout under the Deferred Compensation Plan for Nonemployee Directors. Rebecca A. Bauer as Attorney-in-Fact 2007-07-19