X0306 4 2017-08-15 0000004281 Arconic Inc. ARNC 0001023219 RUSSO PATRICIA F 390 PARK AVENUE NEW YORK, NY 10022 1 0 0 0 Common Stock 7928 D Common Stock 2017-08-15 4 P 0 15000 24.5717 A 18333 I By Trust The price reported in column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $24.46 to $24.63. The reporting person undertakes to provide Arconic Inc., any security holder of Arconic Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth in this footnote. Held by a revocable trust for the benefit of the reporting person. The reporting person is the trustee of the trust. /s/ Margaret Lam (Assistant Secretary), by power of attorney 2017-08-15