KAISER ALUMINUM CORP (KALU) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-05

KAISER ALUMINUM CORP (KALU) has filed 15 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-05. 3 Form 8-K material event filings were reported by KALU in the last 90 days. 6 Form 144 notices of proposed sale were filed for KALU stock. InsiderAlpha tracks every KALU SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About KAISER ALUMINUM CORP (KALU)

SEC CIK0000811596

90-Day SEC Filing Activity

Form 4 filings (90d)15
Form 8-K filings (90d)3
Form 144 notices (90d)6
Latest Form 4 filing2026-06-05

Recent KALU Insider Transactions (Form 4)

DateInsiderRoleTransactionSharesPriceValueFiling
Wilcox BrettInsiderA — Grant or award786$0.00—SEC
Foster David AInsiderA — Grant or award786$0.00—SEC
arnold michael cInsiderA — Grant or award786$0.00—SEC
Glas Kimberly ThompsonInsiderA — Grant or award786$0.00—SEC
HOFFMAN JAMES DONALDInsiderA — Grant or award786$0.00—SEC
Wilcox BrettInsiderA — Grant or award328$178.10$58KSEC
HOFFMAN JAMES DONALDInsiderA — Grant or award589$178.10$105KSEC
STEBBINS DONALD JInsiderA — Grant or award631$178.10$112KSEC
Grimley Richard P.InsiderA — Grant or award786$0.00—SEC
STEBBINS DONALD JInsiderA — Grant or award786$0.00—SEC
MINOR GLENDA JInsiderA — Grant or award335$178.10$60KSEC
MINOR GLENDA JInsiderA — Grant or award786$0.00—SEC
Harvey KeithPresident & CEOS — Open-market sale3.0K$173.13$525KSEC
Grimley Richard P.InsiderS — Open-market sale1.5K$171.52$261KSEC
West Neal EEVP & CFOS — Open-market sale5.0K$173.29$866KSEC

All transactions sourced from SEC EDGAR Form 4 filings for KAISER ALUMINUM CORP (KALU). Updated in real time as new filings are submitted to the SEC.

Most-Active KALU Insiders — Last 90 Days

InsiderForm 4 filingsTotal transaction value
Wilcox Brett3$2.68M
STEBBINS DONALD J2$112K
HOFFMAN JAMES DONALD2$105K
MINOR GLENDA J2$60K
Harvey Keith2$8.75M

Recent KALU Form 8-K Material Events

Recent KALU Form 144 Notices of Proposed Sale

Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.

Recent Insider Filings

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in KALU insider filings:

POpen-market purchase by the insider
SOpen-market sale by the insider
AGrant, award, or other acquisition from the issuer
MExercise or conversion of derivative security (e.g. options)
FPayment of exercise price or tax liability via share withholding
GBona-fide gift of securities
DDisposition to the issuer (e.g. share buyback participation)
JOther acquisition or disposition
XExercise of in-the-money or at-the-money derivative security
CConversion of derivative security
VTransaction voluntarily reported earlier than required

KALU Insider Trading — FAQ

What is the latest insider trade for KALU?
KAISER ALUMINUM CORP (KALU) had 15 insider filings in the last 90 days, with the most recent on 2026-06-05. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying KALU stock?
0 insider purchases of KALU were filed in the last 90 days.
How many insiders are selling KALU stock?
0 insider sales of KALU were filed in the last 90 days.
Where can I see KALU SEC filings (Form 4, 10-K, 10-Q, 8-K)?
InsiderAlpha aggregates every KALU SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live KALU dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.