Alcoa Corporation Annual Meeting of Stockholders Friday, May 10, 2024, 9:30 a.m. Eastern Daylight Time www.virtualshareholdermeeting.com/AA2024 Important Notice Regarding the Availability of Proxy Materialsfor the Annual Meeting of Stockholders to be held on May 10, 2024 The Notice, Proxy Statement, and Annual Report on Form 10-K are available at www.proxyvote.com V33713-P06313 Alcoa Corporation 201 Isabella Street, Suite 500 Pittsburgh, PA 15212 THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS The undersigned hereby appoint(s) William F. Oplinger, Andrew Hastings, and Marissa P. Earnest, and each of them, attorneys and proxies with full power of substitution, to represent and to vote on behalf of the undersigned all of the shares of common stock of Alcoa Corporation the undersigned is/are entitled to vote, including with all the powers which the undersigned would possess if personally present at the Annual Meeting of Stockholders of Alcoa Corporation to be held on May 10, 2024, and at any adjournment or postponement thereof. The shares represented by this proxy will be voted as directed by the stockholder. If no such directions are indicated, the proxies will vote FOR each nominee listed in Item 1 (Election of 10 Director Nominees to Serve for One-Year Terms Expiring in 2025), FOR Item 2 (Ratification of the Appointment of PricewaterhouseCoopers LLP as the Company’s Independent Auditor for 2024), FOR Item 3 (Approval, on an Advisory Basis, of the Company’s 2023 Named Executive Officer Compensation),and AGAINST Item 4 (Stockholder Proposal Requesting the Preparation of an Annual Report on Lobbying Activities, if Properly Presented).The proxies are authorized to vote, in their discretion and to the extent permitted by applicable law or rule, upon other matters that may arise during the 2024 Annual Meeting (including, without limitation, to adjourn the 2024 Annual Meeting). The deadline for voting online or by telephone is 11:59 p.m. Eastern Daylight Time on May 9, 2024. If you vote by mail, your proxy card must be received before the 2024Annual Meeting for your vote to be counted. This card also serves as voting instructions to the trustee of each employee savings plan sponsored by Alcoa, its subsidiaries or affiliates with respect to shares of common stock of Alcoa Corporation held by the undersigned under any such plans. If you hold shares in an Alcoa savings plan, your voting instructions must be received by 11:59 p.m. Eastern Daylight Time on May 7, 2024, or the trustee will vote your plan shares in the same proportion as those plan shares for which instructions have been received. Your vote on the election of directors and the other proposals described in the accompanying Proxy Statement may be specified on the reverse side. If properly signed, dated and returned, this proxy will be voted as specified on the reverse side or, if no choice is specified, this proxy will be voted in accordance with the recommendations of the Board of Directors. Continued and to be signed on reverse side
