144 0001972491 XXXXXXXX LIVE 0000811596 KAISER ALUMINUM CORP 001-09447 1550 W. MCEWEN DRIVE, SUITE 500 FRANKLIN TN 37067 6292527040 Grimley Richard P. Director Common Charles Schwab Corporation

3000 Schwab Way Westlake TX 76262

1524 262615.00 16340606 04/29/2026 NASDAQ Common 04/17/2024 Restricted Stock Award Issuer N 311 04/17/2024 Equity Compensation Common 06/07/2024 Restricted Stock Award Issuer N 1213 06/07/2024 Equity Compensation Y 04/29/2026 RICHARD PAUL GRIMLEY