Management Commentary Exhibit 99.1 Kaiser Aluminum Corporation Reports Fourth Quarter and Full Year 2023 Financial Results Fourth Quarter 2023 Highlights: Full Year 2023 Highlights: FRANKLIN, Tenn., February 21, 2024 - Kaiser Aluminum Corporation (NASDAQ:KALU), 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, ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 1-09447 KAISER ALUMINUM CORPORATION (Exact name of registrant as specified in its charter) Delaware 94-3030279 (State o ...

▪ Managing higher inflationary & other costs ▪ Reduction of net debt leverage 20 KEITH A. HARVEY PRESIDENT AND CHIEF EXECUTIVE OFFICER ▪ Strong diversified portfolio - secular demand growth for aerospace, packaging, and automotive with solid long-term market dynamics continuing to support growth in general engineering applications ▪ Financial strength and operational flexibility to manage a potential downturn | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | |------------------ ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 1-09447 KAISER ALUMINUM CORPORATION (Exact name of registrant as specified in its charter) Delaware 94-3030279 (State of inc ...

▪ Inflationary costs moderating but some costs remain stubbornly higher NEAL E. WEST EXECUTIVE VICE PRESIDENT & CHIEF FINANCIAL OFFICER $ millions Shipments in millions lbs. ▪ Price/mix contributed to annual increase in LTM conversion revenue, despite destocking in packaging and general engineering markets ▪ Strength in aerospace volume, pricing & mix was the strongest contributor in the year over year comparisons ▪ Pricing remained strong across most end market applications as inflationary costs persisted ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 1-09447 KAISER ALUMINUM CORPORATION (Exact name of registrant as specified in its charter) Delaware 94-3030279 (State of in ...

Kaiser Aluminum Corp (NASDAQ:KALU) Q1 2023 Earnings Conference Call April 26, 2023 10:00 AM ET Company Participants Kimberly Orlando - SVP, ADDO Investor Relations Keith Harvey - CEO and President Neal West - EVP and CFO Conference Call Participants Emily Chieng - Goldman Sachs Group Operator Greetings, and welcome to the Kaiser Aluminum Corporation First Quarter 2023 Earnings Conference Call. At this time, all participants are in a listen-only mode. A brief question-and-answer session will follow the forma ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K For the transition period from to Commission File Number: 1-09447 KAISER ALUMINUM CORPORATION (Exact name of registrant as specified in its charter) Delaware 94-3030279 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 1550 West McEwen Drive, Suite 500 Franklin, Tennessee 37067 (Address of principal executive offices) (Zip Code) (629) 252-7040 (Registrant's telephone number, in ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from __________ to __________ Commission File Number: 1-09447 KAISER ALUMINUM CORPORATION (Exact name of registrant as specified in its charter) Delaware 94-3030279 (State o ...

Kaiser Aluminum Corporation (NASDAQ:KALU) Q2 2022 Earnings Conference Call October 20, 2022 1:00 PM ET Company Participants Melinda Ellsworth - Vice President, Investor Relations Keith Harvey - President and Chief Executive Officer Neal West - Executive Vice President and Chief Financial Officer Jennifer Huey - Vice President and Chief Accounting Officer Conference Call Participants Josh Sullivan - The Benchmark Company Emily Chieng - Goldman Sachs Operator Welcome to the Kaiser Aluminum Third Quarter 2022 ...