JOHN MALCOLM DONNAN - 23 Feb 2026 Form 4 Insider Report for KAISER ALUMINUM CORP (KALU)

Role
EVP, CAO and GC
Signature
/s/ Cherrie I. Tsai, with power of attorney for John M. Donnan
Issuer symbol
KALU
Transactions as of
23 Feb 2026
Net transactions value
-$2,309,024
Form type
4
Filing time
25 Feb 2026, 16:55:43 UTC
Previous filing
07 Mar 2025
Next filing
09 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DONNAN JOHN MALCOLM EVP, CAO and GC 1550 WEST MCEWEN DRIVE, SUITE 500, FRANKLIN /s/ Cherrie I. Tsai, with power of attorney for John M. Donnan 25 Feb 2026 0001311544

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction KALU Common Stock, par value $0.01 per share Sale $2,309,024 -18,461 -45% $125.08 22,205 23 Feb 2026 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents the sale of 18,461 shares in multiple transactions, raging from $125.00 to $126.39 per share, resulting in a weighted average sale price of $125.0758 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.
F2 Includes 17,962 shares acquired pursuant to grants of restricted stock units.