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, 2021 ☐ 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 ...

Financial Data and Key Metrics Changes - Adjusted EBITDA for Q1 2021 was approximately $38 million, reflecting an increase of $8 million compared to the second half of 2020 run rate [12] - Value-added revenue for Q1 2021 was $172 million, which is a 12% increase or $19 million compared to the second half of 2020 run rate [12] - Reported net income for Q1 2021 was approximately $5 million, down from $29 million in the prior-year quarter [21] Business Line Data and Key Metrics Changes - Aerospace high-strength value-added revenue for Q1 2021 was $71 million, a slight increase of $2 million or 3% compared to the second half of 2020 run rate [14] - Automotive value-added revenue for Q1 2021 was $28 million, an increase of $3 million or 11% compared to the second half of 2020 run rate [17] - General engineering value-added revenue for Q1 2021 was $72 million, reflecting a 23% increase compared to the second half of 2020 run rate [18] Market Data and Key Metrics Changes - North American service center shipments for soft alloy rod and bar products reached a 20-year record high in March 2021, indicating strong demand [11] - Demand for aluminum packaging is projected to increase by 3% to 5% in 2021 and beyond, driven by sustainability trends [30] Company Strategy and Development Direction - The acquisition of the Warrick Rolling Mill is expected to enhance the company's position in the North American beverage and food can markets [6][7] - The company plans to engage with the Warrick management team to develop a comprehensive long-term strategic plan for the packaging end markets [28] - The company anticipates capital investment plans to maximize growth opportunities in the packaging market and other segments [31] Management's Comments on Operating Environment and Future Outlook - Management noted that all major end markets showed improvement sequentially from the second half of 2020 through Q1 2021 [6] - The outlook for aluminum packaging is promising, with strong demand expected over the next five to ten years [30] - The company expects value-added revenue for existing businesses to increase by approximately 5% to 10% year-over-year for 2021 [34] Other Important Information - The acquisition of Warrick was completed on March 31, 2021, for a purchase price of $670 million [23] - The company has updated its anticipated capital spending for 2021 to be between $75 million and $85 million [25] Q&A Session Summary Question: Can you talk about the contract structures for can now that Warrick's closed? - Management indicated that most contracts are multiyear and that they are currently in the process of renewing some contracts [40] Question: Where is the current CapEx going into? - Management stated that sustaining CapEx and growth projects are roughly 75% of depreciation, with an additional $20 million to $25 million for Warrick [42] Question: How long do you think the demand for Kaiser's plate will last with regards to semiconductor buildup? - Management expressed optimism about long-term demand, noting that they are well-positioned to supply the growing needs in the semiconductor sector [43]

Financial Performance - Q1 2021 - Value Added Revenue (VAR) reached $172 million, a 12% increase compared to the 2H20 run-rate, driven by a 20% increase in shipments[7, 8] - Adjusted EBITDA margin was 21.8%, reflecting strong operating leverage on higher volume[7, 8] - Net Sales were $324 million in 1Q21[20, 29] - Adjusted Net Income was $10 million, resulting in an adjusted EPS of $0.64[20] Segment Performance - General Engineering VAR increased by 23% due to strong service center customer demand, supported by restocking of the supply chain, growth in semiconductor and automotive[8] - Automotive VAR increased by 10% due to new program launches and a favorable product mix[8] - Aerospace/High Strength VAR improved slightly, up 3% from the 2H20 run-rate, with a 23% increase in shipments[9, 10] Acquisition and Outlook - Successfully completed the acquisition of Alcoa Warrick LLC for $670 million on March 31, 2021[6, 21] - The company anticipates the acquisition to add approximately $375 million to $400 million to total consolidated value added revenue[26] - The company anticipates organic business up 5%-10% year-over-year[26]

Kaiser Aluminum Corporation (NASDAQ:KALU) Q4 2020 Results Conference Call February 25, 2021 1:00 PM ET Company Participants Melinda Ellsworth - IR Keith Harvey - President and CEO Neal West - SVP and CFO Jennifer Huey - VP and Chief Accounting Officer Conference Call Participants Josh Sullivan - The Benchmark Company Operator Welcome to the Fourth Quarter 2020 Earnings Conference Call. My name is John. I'll be your operator for today's call. [Operator Instructions] And I will now turn the call over to Meli ...

| --- | |-------| | | | | FORWARD LOOKING STATEMENTS The information contained in this presentation includes statements based on management's current expectations, estimates and projections that constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements include statements regarding the company's anticipated financial and operating performance, relate to future events and expectations and involve known and unknown risks and uncertaintie ...

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.) 27422 Portola Parkway, Suite 200 Foothill Ranch, California 92610-2831 (Address of principal executive offices) (Zip Code) (949) 614-1740 (Registrant's telephone ...

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, 2020 ☐ 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 27422 Po ...

Kaiser Aluminum Corporation (NASDAQ:KALU) Q3 2020 Results Conference Call October 22, 2020 1:00 PM ET Company Participants Melinda Ellsworth - IR Keith Harvey - President and CEO Neal West - SVP and CFO Jennifer Huey - VP & CAO Conference Call Participants Curt Woodworth - Credit Suisse Josh Sullivan - The Benchmark Company Operator Welcome to the Third Quarter 2020 Kaiser Aluminum Earnings Conference Call. My name is John, I'll be your operator here for today's call. At this time, all participants are in ...

THIRD QUARTER 2020 EARNINGS CONFERENCE CALL October 22, 2020 FORWARD LOOKING STATEMENTS The information contained in this presentation includes statements based on management's current expectations, estimates and projections that constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements include statements regarding the company's anticipated financial and operating performance, relate to future events and expectations and involve known ...

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, 2020 ☐ 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 27422 Portola ...