Kaiser Aluminum SVP awarded 852 shares, 216 withheld

On March 5, 2026, Kaiser Aluminum senior vice president Gheorghe Iulian was awarded 852 shares of common stock at no cost, in connection with restricted stock units under the 2021 Equity and Incentive Compensation Plan.

Rhea-AI Filing Summary

On March 5, 2026, Kaiser Aluminum senior vice president Gheorghe Iulian was awarded 852 shares of common stock at no cost, in connection with restricted stock units under the 2021 Equity and Incentive Compensation Plan. That day 216 shares were withheld at $125.8400 per share to satisfy tax obligations from vesting of 2025 restricted stock units. After these events he directly holds 4,623 Kaiser Aluminum shares.

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	$0.00
Exercise Price or Tax Liability	Common Stock, par value $0.01 per share	216	$125.84	$27K

Holdings After Transaction: Common Stock, par value $0.01 per share — 4,623 shares (Direct)

Footnotes (4)

1. F1. 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. F2. Includes 4,660 shares acquired pursuant to grants of restricted stock units.
3. F3. 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. F4. Includes 3,918 shares acquired pursuant to grants of restricted stock units.

Key Figures

Stock grant shares: 852 shares Tax withholding shares: 216 shares Tax withholding price: $125.8400 per share +1 more

4 metrics

Stock grant shares 852 shares Grant/award acquisition reported for March 5, 2026

Tax withholding shares 216 shares Shares withheld for tax obligations from RSU vesting on March 5, 2026

Tax withholding price $125.8400 per share Value used for shares withheld on March 5, 2026

Post-transaction holdings 4,623 shares Direct common stock holdings after reported transactions

Key Terms

restricted stock units, 2021 Equity and Incentive Compensation Plan, withholding tax obligations, vesting

4 terms

restricted stock units financial

"Grant to the reporting person effective as of March 5, 2026 of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2021 Equity and Incentive Compensation Plan financial

"under the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated"

withholding tax obligations financial

"Shares withheld to satisfy the withholding tax obligations resulting from the vesting"

vesting financial

"resulting from the vesting on March 5, 2026 of certain restricted stock units"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stock grant did Gheorghe Iulian report for KALU on March 5, 2026?

He was awarded 852 shares of Kaiser Aluminum common stock at no cost. The grant is tied to restricted stock units under the company’s 2021 Equity and Incentive Compensation Plan, with restrictions scheduled to lapse on March 5, 2029.

How many KALU shares were withheld for Gheorghe Iulian’s tax obligations?

On March 5, 2026, 216 shares of Kaiser Aluminum common stock were withheld at $125.8400 per share. These shares satisfied withholding tax obligations from the vesting of restricted stock units granted to him in 2025 under the 2021 plan.

What are Gheorghe Iulian’s direct KALU shareholdings after the reported transactions?

Following the March 5, 2026 grant and tax withholding, Gheorghe Iulian directly holds 4,623 shares of Kaiser Aluminum common stock. This figure reflects his updated position reported as SVP – Advanced Engineering & Innovation.

Did Gheorghe Iulian buy or sell KALU shares on the open market in this Form 4?

No open-market purchase or sale is reported. The Form 4 shows a grant of 852 shares at no cost and a tax-withholding disposition of 216 shares, both related to restricted stock units under Kaiser Aluminum’s 2021 equity plan.

What equity plan is referenced in Gheorghe Iulian’s KALU Form 4?

The transactions reference the Kaiser Aluminum Corporation 2021 Equity and Incentive Compensation Plan, as amended and restated. Restricted stock units under this plan led to the 852-share award and the 216-share tax withholding on March 5, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/09/2026 - 04:30 PM Learn about SEC filing dates

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.