Alcoa Corp - Power of Attorney for Emily M. Olson

This filing contains a Power of Attorney document for Emily M. Olson, an EVP & Chief Ext. Aff. Officer of Alcoa Corp. The document, dated March 5, 2026, appoints Andrew Hastings, Marissa P. Earnest, and others as her attorneys-in-fact. These attorneys are empowered to execute and file various reports with the SEC, including Forms 3, 4, and 5 concerning securities ownership, acquisition, or disposition, as well as Form ID for EDGAR enrollment. They are also authorized to prepare and file reports for Rule 144 sales of Company common stock and to obtain information regarding the Company's equity securities from third parties. The Power of Attorney remains in effect until Ms. Olson is no longer required to file these reports or until it is revoked. This document revokes any prior Powers of Attorney related to these matters.