Hugh J. Barger III - 01 Jan 2026 Form 3 Insider Report for KAISER ALUMINUM CORP (KALU)

Role: EVP - Sales & Marketing
Signature: /s/ Cherrie I. Tsai, with power of attorney for Hugh J. Barger, III
Issuer symbol: KALU
Transactions as of: 01 Jan 2026
Net transactions value: $0
Form type: 3
Filing time: 12 Jan 2026, 19:02:56 UTC
Next filing: 09 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Barger Hugh J. III	EVP - Sales & Marketing	1550 W. MCEWEN DRIVE, SUITE 500, FRANKLIN	/s/ Cherrie I. Tsai, with power of attorney for Hugh J. Barger, III	12 Jan 2026	0002104698

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	KALU	Common Stock, par value $0.01 per share						4,025	01 Jan 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes 4,025 shares acquired pursuant to grants of restricted stock units.