X0306 4 2016-02-09 0000004281 ALCOA INC. AA 0001136562 PLANT JOHN C 390 PARK AVENUE NEW YORK, NY 10022 1 0 0 0 Common Stock 2016-02-09 4 P 0 30000 7.6748 A 30000 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 $7.67 to $7.69. The reporting person undertakes to provide to Alcoa Inc., any security holder of Alcoa 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. Revocable living trust of which the reporting person is the trustee and beneficiary, with voting and investment power. /s/ Margaret Lam (Assistant Secretary), by power of attorney 2016-02-11