DONNAN JOHN MALCOLM 4

What Happened John Malcolm Donnan, EVP, Chief Accounting Officer and General Counsel of Kaiser Aluminum, was granted/received restricted equity and performance share awards on March 5, 2026. The Form 4 reports acquisitions of 3,699 and 11,649 shares (awards, code A) and the withholding of 3,441 and 1,669 shares (code F) to satisfy tax obligations at $125.84 per share. The tax-withheld shares generated cash proceeds of $433,015 and $210,027 respectively (total ~$643,042). Net new shares to the insider from this event = 15,348 granted − 5,110 withheld = 10,238 shares retained.

Key Details

• Transaction date: March 5, 2026; Form 4 filed March 9, 2026 (timely).
• Grants reported: 3,699 and 11,649 shares (code A, awards/grants).
• Withheld for taxes: 3,441 and 1,669 shares (code F) at $125.84/share; total withholding ≈ $643,042.
• Net shares added to insider’s position from this vesting event: 10,238 shares.
• Footnotes: performance shares vested based on certified 2023–2025 performance multiplier; RSUs granted/vested carry restrictions that lapse on March 5, 2029 (or earlier upon specified events).
• Shares owned after the transaction were not specified in the provided extract.

Context This was an award/vesting event with shares surrendered to satisfy tax withholding — a routine, non-open-market disposition used to cover taxes, not a sale signaling market opinion. Some shares remain subject to time-based or performance-related restrictions (vesting/compliance through March 5, 2029).