X0306 4/A 2020-04-03 2020-04-07 0000004281 Howmet Aerospace Inc. HWM 0001490905 Alving Amy E 201 ISABELLA STREET SUITE 200 PITTSBURGH PA 15212-5872 1 0 0 0 Common Stock 2020-04-03 4 A 0 3229 12.54 A 26785 D On April 1, 2020, Arconic, Inc. completed the separation of its business into two independent, publicly-traded companies (the Separation): Howmet Aerospace, Inc. and Arconic Corporation. This Form 4 is being further amended to reflect the total number of Howmet Aerospace Inc. shares underlying equity awards held by the reporting person after reflecting the adjustment of all Arconic Inc. equity awards held by the reporting person as of the Separation in accordance with the Employee Matters Agreement, dated as of March 31, 2020, as amended, between Howmet Aerospace Inc and Arconic Corporation. /s/ Margaret Lam, Assistant Secretary / Attorney in Fact 2021-01-07