X0306 4 2019-12-17 0000004281 Arconic Inc. ARNC 0001509955 Ramundo Katherine H 390 PARK AVENUE NEW YORK, NY 10022 0 1 0 0 EVP, CLO and Corp Secretary Common Stock 2019-12-17 4 A 0 47600 0 A 127408 D Represents the conversion of performance-based restricted share units granted in February 2019 to time-based restricted share units, as approved by the Compensation and Benefits Committee of the Board of Directors of Arconic Inc. in order to address the planned separation of Arconic Inc. into two independent publicly traded companies, as previously announced by Arconic Inc. /s/ Margaret Lam (Assistant Secretary), by power of attorney 2019-12-18