X0306 5 2016-12-31 0 0 0000040888 AEROJET ROCKETDYNE HOLDINGS, INC. AJRD 0001186913 CORCORAN THOMAS A 222 N. SEPULVEDA BLVD., SUITE 500 EL SEGUNDO CA 90245 1 Common Stock 5371 D Common Stock 90884 I Thomas A. Corcoran TTEE U/A DTD 07/16/2001 The Reporting Person's Form 4 filed on December 1, 2016 incorrectly reported 2,000 shares of common stock as being gifted from the Reporting Person's direct holdings. The shares were gifted from the Thomas A. Corcoran TTEE U/A DTD 07/16/2001 Trust. 681 shares that were previously reported as directly owned on the Reporting Person's Form 4 filed December 1, 2016 have been transferred to the Thomas A. Corcoran TTEE U/A DTD 07/16/2001 Trust since that filing and are now being reported as indirectly owned. /s/ Rebecca A. Bauer, attorney-in-fact 2017-01-26