X0306 4 2019-02-15 0000004281 Arconic Inc. ARNC 0001136562 PLANT JOHN C 390 PARK AVENUE NEW YORK, NY 10022 1 1 0 0 Chief Executive Officer Restricted Stock Unit 2019-02-15 4 A 0 1000000 0 A Common Stock 1000000 1000000 D Each restricted stock unit represents a contingent right to receive one share of common stock of Arconic Inc. ("Arconic") or, at Arconic's election, cash equivalent to the fair market value thereof. The restricted stock units generally vest on the first anniversary of February 6, 2019, contingent on Mr. Plant's continued service as Chief Executive Officer through such date and subject to partial or full accelerated vesting upon the occurrence of certain events. Vested restricted stock units will be settled in shares or cash, as applicable, within 30 days following the vesting date. /s/ Margaret Lam (Assistant Secretary), by power of attorney 2019-02-19