X0508 4 2025-03-05 0000811596 KAISER ALUMINUM CORP KALU 0001978222 Narayan Vijai 1550 WEST MCEWEN DRIVE SUITE 500 FRANKLIN TN 37067 false true false false VP, Corp Ctrl & CAO false Common Stock, par value $0.01 per share 2025-03-05 4 A false 1342 0 A 7526 D Grant to the reporting person effective as of March 5, 2025 of restricted stock units under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated. All restrictions will lapse on March 5, 2028 or earlier upon the occurrence of certain specified circumstances. Includes 7,022 shares acquired pursuant to grants of restricted stock units. /s/ Cherrie I. Tsai, with power of attorney for Vijai Narayan 2025-03-07