Alcoa Corporation ("Alcoa") will participate in a live webcast session at the Jefferies Global Industrials Conference in New York City on Thursday, September 10, 2026.

At 11:30 a.m. EDT, an Alcoa executive will participate in a question-and-answer session regarding Alcoa’s business and outlook in the current market, including factors that could affect the present quarter’s financial results.

A slide presentation, to be used in connection with the conference and investor meetings, will be available on the "Investors" section of Alcoa’s website, www.alcoa.com, beginning at approximately 7:00 a.m. EDT on September 9, 2026.

The live webcast will be available on the "Investors" section of Alcoa’s website, www.alcoa.com.

A transcript and audio replay will also be available after the session on the "Investors" section of www.alcoa.com.

About Alcoa Corporation

Alcoa (NYSE:AA, ASX: AAI)) is a global industry leader in alumina and aluminum products with a Vision to build a legacy of excellence for future generations. Since developing the process that made aluminum an affordable and vital part of modern life, our talented Alcoans have developed breakthrough innovations and best practices that have led to greater safety, efficiency, sustainability, and stronger communities wherever we operate.

Dissemination of Company Information

Alcoa intends to make future announcements regarding company developments and financial performance through its website, www.alcoa.com, as well as through press releases, filings with the Securities and Exchange Commission, conference calls, media broadcasts, and webcasts. Alcoa does not incorporate the information contained on, or accessible through, its corporate website or such other websites or platforms referenced herein into this press release.

Cautionary Statement on Forward-Looking Statements

This session will contain statements that relate to future events and expectations and as such constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include those containing such words as "aims," "ambition," "anticipates," "believes," "could," "develop," "endeavors," "estimates," "expects," "forecasts," "goal," "intends," "may," "outlook," "potential," "plans," "projects," "reach," "seeks," "sees," "should," "strive," "targets," "will," "working," "would," or other words of similar meaning. All statements by Alcoa Corporation that reflect expectations, assumptions or projections about the future, other than statements of historical fact, are forward-looking statements, including, without limitation, statements regarding Alcoa Corporation’s proposed transaction to acquire South32 Limited’s equity interests in its bauxite, alumina, and aluminum assets (the proposed transaction referred to as the "Transaction"); the ability of the parties to complete the Transaction on the expected timeline or at all considering the closing conditions; the expected benefits of the Transaction, including the anticipated synergies and earnings per share and free cash flow accretion; the competitive ability and position following completion of the Transaction; the ability to complete any proposed debt financing in connection with the Transaction; forecasts concerning global demand growth for bauxite, alumina, and aluminum, and supply/demand balances; statements, projections or forecasts of future or targeted financial results, or operating performance (including our ability to execute on strategies related to environmental, social and governance matters); statements about strategies, outlook, and business and financial prospects (including related to production and shipments); and statements about capital allocation and return of capital. These statements reflect beliefs and assumptions that are based on Alcoa Corporation’s perception of historical trends, current conditions, and expected future developments, as well as other factors that management believes are appropriate in the circumstances.

Forward-looking statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties, and changes in circumstances that are difficult to predict. Although Alcoa Corporation believes that the expectations reflected in any forward-looking statements are based on reasonable assumptions, it can give no assurance that these expectations will be attained and it is possible that actual results may differ materially from those indicated by these forward-looking statements due to a variety of risks and uncertainties. Such risks and uncertainties include, but are not limited to: (a) the non-satisfaction or non-waiver, on a timely basis or otherwise, of one or more closing conditions to the Transaction; (b) the prohibition or delay of the consummation of the Transaction by a governmental entity; (c) the risk that the Transaction may not be completed in the expected time frame or at all; (d) unexpected costs, charges or expenses resulting from the Transaction; (e) uncertainty of the expected financial performance following completion of the Transaction; (f) uncertainty of any contingent payment required to be made in connection with the Transaction following completion; (g) failure to realize the anticipated benefits of the Transaction; (h) the occurrence of any event that could give rise to termination of the Transaction; (i) potential litigation in connection with the Transaction or other settlements or investigations that may affect the timing or occurrence of the Transaction or result in significant costs of defense, indemnification and liability; (j) the impact of global economic conditions on the aluminum industry and aluminum end-use markets; (k) volatility and declines in aluminum and alumina demand and pricing, including global, regional, and product-specific prices, or significant changes in production costs which are linked to the London Metal Exchange (LME) or other commodities; (l) the disruption of market-driven balancing of global aluminum supply and demand by non-market forces; (m) competitive and complex conditions in global markets; (n) our ability to obtain, maintain, or renew permits or approvals necessary for our mining operations; (o) rising energy costs and interruptions or uncertainty in energy supplies; (p) unfavorable changes in the cost, quality, or availability of raw materials or other key inputs, or by disruptions in the supply chain; (q) economic, political, and social conditions, including the impact of trade policies, tariffs, and adverse industry publicity; (r) legal proceedings, investigations, or changes in foreign and/or U.S. federal, state, or local laws, regulations, or policies; (s) changes in tax laws or exposure to additional tax liabilities; (t) climate change, climate change legislation or regulations, and efforts to reduce emissions and build operational resilience to extreme weather conditions; (u) disruptions in the global economy caused by ongoing regional conflicts and wars; (v) fluctuations in foreign currency exchange rates and interest rates, inflation and other economic factors in the countries in which we operate; (w) global competition within and beyond the aluminum industry; (x) our ability to achieve our strategies or expectations relating to environmental, social, and governance considerations; (y) claims, costs, and liabilities related to health, safety and environmental laws, regulations, and other requirements in the jurisdictions in which we operate; (z) liabilities resulting from impoundment structures, which could impact the environment or cause exposure to hazardous substances or other damage; (aa) dilution of the ownership position of Alcoa’s stockholders (including as a result of the Transaction), price volatility, and other impacts on the price of Alcoa common stock by the secondary listing of the Alcoa common stock on the Australian Securities Exchange; (bb) our ability to obtain or maintain adequate insurance coverage; (cc) our ability to execute on our strategy to reduce complexity and optimize our asset portfolio and to realize the anticipated benefits from announced plans, programs, initiatives relating to our portfolio, capital investments, and developing technologies; (dd) our ability to integrate and achieve intended results from joint ventures, other strategic alliances, and strategic business transactions; (ee) significant declines in the market value of our marketable securities; (ff) our ability to fund capital expenditures; (gg) deterioration in our credit profile or increases in interest rates; (hh) impacts on our current and future operations due to our indebtedness and our ability to reduce indebtedness; (ii) our ability to continue to return capital to our stockholders through the payment of cash dividends and/or the repurchase of our common stock; (jj) cyber attacks, security breaches, system failures, software or application vulnerabilities, or other cyber incidents; (kk) labor market conditions, union disputes and other employee relations issues; and (ll) the other risk factors discussed in Alcoa’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025, Alcoa’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, and other reports filed by Alcoa Corporation with the U.S. Securities and Exchange Commission ("SEC"). Certain illustrative pro forma information included in certain investor materials may differ materially from pro forma information included in SEC filings, including the Registration Statement (as defined below). Alcoa cautions readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date they are made. These risks, as well as other risks associated with the Transaction, will be more fully discussed in the Registration Statement. Alcoa disclaims any obligation to update publicly any forward-looking statements, whether in response to new information, future events or otherwise, except as required by applicable law. Neither Alcoa nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements.

No Offer or Solicitation

This session is for informational purposes and is not intended to, and shall not, constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote of approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

Additional Information and Where to Find It

This session relates to the Transaction. In connection with the Transaction, Alcoa plans to file with the SEC relevant materials, including a registration statement on Form S-4 that will include a prospectus of Alcoa (including documents incorporated by reference therein, the "Registration Statement"). This communication is not a substitute for the Registration Statement or any other document that Alcoa may file with the SEC in connection with the Transaction. Before making any investment decision, Alcoa’s investors and shareholders are urged to read the Registration Statement and all relevant documents filed or to be filed with the SEC, as well as any amendments or supplements to those documents, when they become available, because they will contain important information about Alcoa and the Transaction. Alcoa’s investors and shareholders will be able to obtain a free copy of the Registration Statement, as well as other filings containing information about Alcoa, free of charge, at the SEC’s website (www.sec.gov). Copies of the Registration Statement and other documents filed by Alcoa with the SEC may be obtained, without charge, by contacting Alcoa through its website at https://investors.alcoa.com/.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260826228474/en/

Investor Contact:

Jason Duty

724-316-4366

Jason.M.Duty@alcoa.com

Media Contact:

Sarah Ayer

412-965-7622

Sarah.Ayer@alcoa.com