Form4insider filings, from the source

Company · CIK 0000811596 · SIC 3350 — Rolling Drawing & Extruding of Nonferrous Metals · Nasdaq

KAISER ALUMINUM CORP · KALU

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 4, 2026 AForm 4 →Jun 5, 6:19 pm EDTmichael c arnoldDirector786——11,445—
Jun 4, 2026 AForm 4 →Jun 5, 6:11 pm EDTKimberly Thompson GlasDirector786——3,466—
Jun 4, 2026 AForm 4 →Jun 5, 5:53 pm EDTDonald J StebbinsDirector1,417$178.10$112,38115,407—
Jun 4, 2026 AForm 4 →Jun 5, 5:50 pm EDTBrett WilcoxDirector1,114$178.10$58,4173,019—
Jun 4, 2026 AForm 4 →Jun 5, 5:49 pm EDTJames Donald HoffmanDirector1,375$178.10$104,9013,760—
Jun 4, 2026 AForm 4 →Jun 5, 5:46 pm EDTRichard P. GrimleyDirector786——5,364—
Jun 4, 2026 AForm 4 →Jun 5, 5:17 pm EDTGlenda J MinorDirector1,121$178.10$59,6644,516—
Jun 4, 2026 AForm 4 →Jun 5, 5:15 pm EDTDavid A FosterDirector786——24,332—

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.