Director Brett Wilcox trust sells 15,000 Kaiser Aluminum (KALU) shares

Rhea-AI Filing Summary

Kaiser Aluminum Corp director Brett Wilcox, through the Wilcox Revocable Trust, reported an open-market sale of 15,000 shares of common stock. The shares were sold in multiple trades between $173.60 and $175.23 per share, at a weighted average price of $174.44 per share.

Following the sale, the Wilcox Revocable Trust holds 9,887 shares of Kaiser Aluminum indirectly, while Wilcox also directly holds 1,905 shares. The filing also includes a holding entry reflecting his direct ownership position.

Insights

Equity ownership analyst

Director-linked trust sells 15,000 Kaiser Aluminum shares but retains a sizable stake.

The filing shows the Wilcox Revocable Trust, associated with director Brett Wilcox, executed an open-market sale of 15,000 Kaiser Aluminum shares at a weighted average price of $174.44. Trades occurred in a narrow band between $173.60 and $175.23, indicating typical market execution.

After the transaction, the trust still holds 9,887 shares indirectly, and Wilcox directly owns 1,905 shares. With no derivative positions reported and no reference to a trading plan, this appears as a straightforward reduction in equity exposure. The sale scale is meaningful relative to the trust’s prior holdings but represents only one director’s position.

Insider Trade Summary

Net Seller: 15,000 shares

Net Sell 2 txns

Insider Wilcox Brett

Role Director

Sold 15,000 shs ($2.62M)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.01 per share	15,000	$174.44	$2.62M
holding	Common Stock, par value $0.01 per share	--	--	--

Holdings After Transaction: Common Stock, par value $0.01 per share — 9,887 shares (Indirect, By Wilcox Revocable Trust); Common Stock, par value $0.01 per share — 1,905 shares (Direct)

Footnotes (1)

1. F1. Represents the sale of 15,000 shares in multiple transactions, ranging from $173.60 to $175.23 per share, resulting in a weighed average sale price of $.174.44 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.

Key Figures

Shares sold: 15,000 shares Weighted average sale price: $174.44 per share Sale price range: $173.60–$175.23 per share +3 more

6 metrics

Shares sold 15,000 shares Open-market sale by Wilcox Revocable Trust

Weighted average sale price $174.44 per share Multiple transactions on reported date

Sale price range $173.60–$175.23 per share Prices across multiple sale executions

Indirect holdings after sale 9,887 shares Wilcox Revocable Trust position post-transaction

Direct holdings after sale 1,905 shares Brett Wilcox direct ownership entry

Net buy/sell shares 15,000 shares net sold Aggregate from transaction summary

Key Terms

open-market sale, indirect ownership, weighted average sale price, Form 4

4 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

indirect ownership financial

""direct_or_indirect": "I", "nature_of_ownership": "By Wilcox Revocable Trust""

weighted average sale price financial

"resulting in a weighed average sale price of $.174.44 per share"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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

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Accepted by SEC EDGAR 04/29/2026 - 04:30 PM Learn about SEC filing dates

FAQ

What insider transaction did Kaiser Aluminum (KALU) report for Brett Wilcox?

Brett Wilcox, via the Wilcox Revocable Trust, reported selling 15,000 Kaiser Aluminum shares. The open-market sale used multiple trades and resulted in a weighted average price of $174.44 per share, according to the Form 4 insider filing.

At what price did the Wilcox Revocable Trust sell Kaiser Aluminum (KALU) shares?

The Wilcox Revocable Trust sold Kaiser Aluminum shares at a weighted average of $174.44 each. Individual trades occurred in a price range from $173.60 to $175.23 per share, all on the same reported transaction date.

How many Kaiser Aluminum (KALU) shares did the Wilcox Revocable Trust sell?

The Wilcox Revocable Trust sold 15,000 shares of Kaiser Aluminum common stock. These shares were disposed of in an open-market sale, executed through multiple trades within a narrow price range around the reported weighted average price.

How many Kaiser Aluminum (KALU) shares does Brett Wilcox hold after the sale?

After the sale, Brett Wilcox holds 1,905 shares directly and 9,887 shares indirectly. The indirect holdings are through the Wilcox Revocable Trust, as noted in the Form 4, while the direct position is recorded in a separate holding entry.

Was the Kaiser Aluminum (KALU) insider transaction a buy or a sell?

The insider transaction reported for Kaiser Aluminum was a sale. The Wilcox Revocable Trust, associated with director Brett Wilcox, carried out an open-market sale of 15,000 common shares, reducing but not eliminating its indirect ownership position.

Does Brett Wilcox have derivative positions in Kaiser Aluminum (KALU) after this Form 4?

The Form 4 shows no remaining derivative positions for Brett Wilcox. The derivative summary is empty, and the filing only lists common stock holdings, both directly owned and indirectly held through the Wilcox Revocable Trust.

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^*

Wilcox Brett

(Last) (First) (Middle)

1550 WEST MCEWEN DRIVE

SUITE 500

(Street)

FRANKLIN TENNESSEE 37067

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

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

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

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

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	04/27/2026		S		15,000	D	$174.44(1)	9,887	I	By Wilcox Revocable Trust
Common Stock, par value $0.01 per share								1,905	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. Represents the sale of 15,000 shares in multiple transactions, ranging from $173.60 to $175.23 per share, resulting in a weighed average sale price of $.174.44 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.

	/s/ Cherrie I. Tsai, with power of attorney for Brett Wilcox	04/29/2026
	** 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.
* Form 4: SEC 1474 (03-26)