Louis Fred Stephan - 01 Nov 2026 Form 4 Insider Report for KAISER ALUMINUM CORP (KALU)

Reporting relationship: President & CEO, Director
Issuer ticker: KALU
Reported as of: 01 Nov 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Nov 2026, 16:40:02 UTC
Prior SEC filing: 03 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Cherrie I. Tsai, with power of attorney for Louis Fred Stephan

Filing notes and source

Key filing fact

Louis Fred Stephan filed Form 4 for KAISER ALUMINUM CORP (KALU) on 03 Nov 2026.

Key facts

This page summarizes Louis Fred Stephan's Form 4 filing for KAISER ALUMINUM CORP (KALU).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Nov 2026, 16:40.

Change

Previous filing in this sequence was filed on 03 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001739321 Primary reporting owner

Stephan Louis Fred

Relationship: President & CEO, Director
Address: 1550 WEST MCEWEN DRIVE, SUITE 500, FRANKLIN
Signature: /s/ Cherrie I. Tsai, with power of attorney for Louis Fred Stephan
Signature date: 03 Nov 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

KALU transaction

Common Stock, par value $0.01 per share

Award

Transaction value
Shares: +27,229
Change %
Price: $0.000000^*
Shares after: 27,229
Date: 01 Nov 2026
Ownership: Direct
Footnotes: F1

KALU transaction

Common Stock, par value $0.01 per share

Award

Transaction value
Shares: +14,457
Change %: +53%
Price: $0.000000^*
Shares after: 41,686
Date: 01 Nov 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Grant to the reporting person 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, 2029.

Footnote F2

Grant to the reporting person of restricted stock units under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated. Restrictions on 50% of the restricted stock units will lapse on November 1, 2027 and restrictions on the remaining 50% of the restricted stock units will lapse on November 1, 2028.