Kaiser Aluminum (KALU) SVP gets stock grant and tax share withholding

Rhea-AI Filing Summary

Kaiser Aluminum Corp senior vice president Iulian Gheorghe received a grant of 852 shares of common stock on March 5, 2026 as restricted stock units under the company’s 2021 Equity and Incentive Compensation Plan. The grant was at $0.00 per share.

On the same date, 216 shares at $125.84 per share were withheld to cover tax obligations from vesting of earlier awards, reducing his directly held common stock from 4,839 to 4,623 shares. Footnotes note these holdings include shares acquired through prior restricted stock unit grants.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Gheorghe Iulian

Role SVP - Adv Eng & Innovation

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.01 per share	852	$0.00	--
Tax Withholding	Common Stock, par value $0.01 per share	216	$125.84	$27K

Holdings After Transaction: Common Stock, par value $0.01 per share — 4,839 shares (Direct)

Footnotes (1)

1. Grant to the reporting person effective as of March 5, 2026 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 or earlier uponthe occurrence of certain specified circumstances. Includes 4,660 shares acquired pursuant to grants of restricted stock units. Shares withheld to satisfy the withholding tax obligations resulting from the vesting on March 5, 2026 of certain restricted stock units granted to the reporting person in 2025 under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan. Includes 3,918 shares acquired pursuant to grants of restricted stock units.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gheorghe Iulian

(Last) (First) (Middle)

1550 W. MCEWEN DRIVE

SUITE 500

(Street)

FRANKLIN TN 37067

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
KAISER ALUMINUM CORP [ KALU ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP - Adv Eng & Innovation

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	03/05/2026		A		852(1)	A	$0(1)	4,839(2)	D
Common Stock, par value $0.01 per share	03/05/2026		F(3)		216	D	$125.84	4,623(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Grant to the reporting person effective as of March 5, 2026 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 or earlier uponthe occurrence of certain specified circumstances.

2. Includes 4,660 shares acquired pursuant to grants of restricted stock units.

3. Shares withheld to satisfy the withholding tax obligations resulting from the vesting on March 5, 2026 of certain restricted stock units granted to the reporting person in 2025 under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan.

4. Includes 3,918 shares acquired pursuant to grants of restricted stock units.

	/s/ Cherrie I. Tsai, with power of attorney for Iulian Gheorghe	03/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions did KALU executive Iulian Gheorghe report?

Iulian Gheorghe reported receiving 852 shares of Kaiser Aluminum common stock as a restricted stock unit grant on March 5, 2026. He also reported 216 shares withheld the same day to satisfy tax obligations from vesting of earlier restricted stock unit awards.

Was the KALU insider stock grant to Iulian Gheorghe a cash purchase?

No, the 852-share grant to Iulian Gheorghe was priced at $0.00 per share as an equity award. It was issued under Kaiser Aluminum’s 2021 Equity and Incentive Compensation Plan, reflecting stock-based compensation rather than an open-market cash purchase of shares.

Why were 216 KALU shares disposed of in Iulian Gheorghe’s Form 4?

The 216 shares were withheld to cover withholding tax obligations from vesting of restricted stock units granted in 2025. This transaction is coded as a tax-withholding disposition, meaning shares were used to pay taxes rather than sold in the open market.

How many Kaiser Aluminum (KALU) shares does Iulian Gheorghe hold after these transactions?

After the March 5, 2026 grant and tax withholding, Iulian Gheorghe directly holds 4,623 shares of Kaiser Aluminum common stock. Footnotes explain that thousands of these shares were originally acquired through prior restricted stock unit grants under the company’s 2021 equity plan.

When do the newly granted KALU restricted stock units to Iulian Gheorghe vest?

All restrictions on the 852-share restricted stock unit grant will lapse on March 5, 2029. Footnotes also state vesting could occur earlier upon certain specified circumstances, as defined under Kaiser Aluminum’s 2021 Equity and Incentive Compensation Plan documentation.