X0306 4 2021-05-17 0000040888 AEROJET ROCKETDYNE HOLDINGS, INC. AJRD 0001820928 McNiff Audrey A. 222 N. PACIFIC COAST HIGHWAY, SUITE 500 EL SEGUNDO CA 90245 1 Common Stock 2021-05-17 4 A 0 385 47.21 A 887 D Common Stock 2021-05-17 4 A 0 192 47.21 A 1079 D Common Stock 2021-05-17 4 A 0 2202 0 A 3281 D Common Stock 3586 I Rabbi Trust Effective March 24, 2010, the Board of Directors approved a Director Compensation Program which allows Directors to receive Aerojet Rocketdyne Holdings, Inc. common stock in lieu of their cash compensation. The number of shares of common stock shown reflects the common stock received by this Reporting Person in lieu of her annual cash retainer fee paid quarterly. 502 shares that were previously reported as indirectly owned on the Reporting Person's Form 4 filed February 17, 2021 have been transferred to common stock since that filing and are now being reported as directly owned. Pursuant to the Director Compensation Program, if a Director elects to receive common stock in lieu of at least 50% of her cash compensation, the Company will grant restricted shares equal in value to 50% of the amount of cash compensation she elects to receive in common stock. Such restricted shares will vest on the earlier of (i) the date of the Director's retirement from the Board, and (ii) one year after the grant date. The number of shares of common stock shown reflects the grant of restricted shares. Grant to Reporting Person of restricted stock under the Aerojet Rocketdyne Holdings, Inc. 2019 Equity and Performance Incentive Plan. Such shares of restricted stock will vest in 50% increments on November 15, 2021 and May 15, 2022. /s/ Rebecca A. Bauer, attorney-in-fact 2021-05-19