KALU Kaiser Aluminum Corporation

Kaiser Aluminum Corporation (NASDAQ: KALU) today published its 2023 Sustainability Report summarizing the Company’s focus and initiatives around its sustainability program and practices, consistent with its corporate values to be a preferred investment, a preferred supplier, a preferred customer, a preferred employer, and a valued corporate citizen. The report is available on the Company’s website at https://www.kaiseraluminum.com.

“We view sustainability as a strategic imperative that is central to our business and advancing toward a more sustainable future,” said Keith A. Harvey, President, and Chief Executive Officer. “Our 2023 report reflects another strong year of continued progress and solid performance against our key sustainability goals which directly align with our corporate values. Given the infinite recyclability of aluminum, we believe our products are part of the solution to achieve a low-impact future, positioning us well to continue pursuing long-term growth in our business while achieving our sustainability goals.”

Highlights of the Company’s sustainability efforts in 2023 include:

• The completion of an inaugural materiality assessment to understand and integrate the perspectives of key stakeholders into the company sustainability strategy.
• On track to achieve our 2030 GHG emissions intensity reduction targets for Scope 1, 2 and 3.
• A reduction in total estimated Scope 1 and 2 greenhouse gas absolute emissions by 4% over the prior year due to increased manufacturing efficiency and lower Scope 2 emissions.
• Continued progress to reduce reliance on electricity from coal-fired power sources and gain access to lower carbon electricity sources.

About Kaiser Aluminum Corporation

Kaiser Aluminum Corporation, headquartered in Franklin, Tenn., is a leading producer of semi-fabricated specialty aluminum products, serving customers worldwide with highly-engineered solutions for aerospace and high-strength, packaging, general engineering, automotive extrusions, and other industrial applications. The Company’s North American facilities produce value-added plate, sheet, coil, extrusions, rod, bar, tube, and wire products, adhering to traditions of quality, innovation, and service that have been key components of the culture since the Company was founded in 1946. The Company’s stock is included in the Russell 2000® index and the S&P Small Cap 600® index.

Available Information

For more information, please visit the Company’s website at www.kaiseraluminum.com. The website includes a section for investor relations under which the Company provides notifications of news or announcements regarding its financial performance, including Securities and Exchange Commission (SEC) filings, investor events, and earnings and other press releases. In addition, all Company filings submitted to the SEC are available through a link to the section of the SEC’s website at www.sec.gov, which includes: Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and Proxy Statements for the Company’s annual stockholders’ meetings, and other information statements as filed with the SEC. In addition, the Company provides a webcast of its quarterly earnings calls and certain events in which management participates or hosts with members of the investment community.

Contact:Addo Investor RelationsInvestors@KaiserAluminum.com949-614-1769