John M. Donnan - 27 Apr 2026 Form 4 Insider Report for KAISER ALUMINUM CORP (KALU)

Reporting relationship: EVP, CAO and GC
Issuer ticker: KALU
Reported as of: 27 Apr 2026
Net transaction value: -$488,807
SEC form: 4
Accepted by SEC: 29 Apr 2026, 16:30:07 UTC
Prior SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Cherrie I. Tsai, with power of attorney for John M. Donnan

Key filing fact

John M. Donnan filed Form 4 for KAISER ALUMINUM CORP (KALU) on 29 Apr 2026.

Key facts

This page summarizes John M. Donnan's Form 4 filing for KAISER ALUMINUM CORP (KALU).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 29 Apr 2026, 16:30.

Change

Previous filing in this sequence was filed on 09 Mar 2026.
Current net transaction value: -$488,807.

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 0001311544 Primary reporting owner

DONNAN JOHN MALCOLM

Relationship: EVP, CAO and GC
Address: 1550 WEST MCEWEN DRIVE, SUITE 500, FRANKLIN
Signature: /s/ Cherrie I. Tsai, with power of attorney for John M. Donnan
Signature date: 29 Apr 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

Sale

Transaction value: $488,807
Shares: -2,743
Change %: -8.5%
Price: $178.20
Shares after: 29,700
Date: 27 Apr 2026
Ownership: Direct
Footnotes: F1, F2

KALU transaction

Common Stock, par value $0.01 per share

Gift

Transaction value
Shares: -1,500
Change %: -5.1%
Price: $0.000000^*
Shares after: 28,200
Date: 28 Apr 2026
Ownership: Direct
Footnotes: F2, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents the sale of 2,743 shares in multiple transactions, ranging from $175.96 to $179.41 per share, resulting in a weighted average sale price of $178.20 per share. The reporting person undertakes to provide upon request by the SEC staff, the Registrant, or a security holder of the Registrant, full information regarding the number of shares sold at each separate price within the range.

Footnote F2

Includes 17,422 shares acquired pursuant to grants of restricted stock units.

Footnote F3

Bona fide gift by the reporting person to a charitable trust for no consideration.