Kaiser Aluminum (KALU) Form 144 shows 2,743-Share Vesting; 18,461 Sold

Rhea-AI Filing Summary

Kaiser Aluminum Corporation reported a Form 144 notice relating to proposed or recent transactions in its Common Stock, $0.01 par. The filing lists a vesting event on 03/05/2025 tied to 2,743 shares and reports 18,461 shares shown as sold in the past three months. The filing names R.W. Baird as broker and includes a 04/27/2026 date alongside Nasdaq listing details.

Insights

Securities Counsel

Form 144 notice lists proposed affiliate sales and recent dispositions.

The filing documents a vesting of equity on 03/05/2025 for 2,743 shares and shows 18,461 shares in the "sold during the past 3 months" column. It names R.W. Baird as the broker-dealer.

These entries reflect a Rule 144 disclosure of intended or recent transactions by an affiliate; cash-flow treatment and final sale timing are not specified in the excerpt. Subsequent SEC filings or brokerage confirmations would show completed sale details.

Key Figures

Vesting shares: 2,743 shares Shares sold (past 3 months): 18,461 shares Adjacent reported number: 2,309,024 +1 more

4 metrics

Vesting shares 2,743 shares Vesting of Equity Award on 03/05/2025

Shares sold (past 3 months) 18,461 shares Listed in "Securities Sold During The Past 3 Months" row dated 02/23/2026

Adjacent reported number 2,309,024 Number shown adjacent to 18,461 in the past-three-months table

Filing date shown 04/27/2026 Date listed with broker and securities row

Key Terms

Form 144, Vesting of Equity Award, Stock Compensation, Common Stock, par value $0.01

4 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Vesting of Equity Award financial

"Securities To Be Sold | 03/05/2025 | Vesting of Equity Award"

Stock Compensation financial

"03/05/2025 | Stock Compensation"

Stock compensation is a way companies reward employees by giving them shares or options to buy shares in the company, rather than just paying them cash. It aligns employees’ interests with those of shareholders, as employees benefit when the company’s stock value increases. For investors, stock compensation can influence company expenses and ownership structure, affecting the company’s overall value and stock performance.

Common Stock, par value $0.01 financial

"Common Stock, par value $0.01 per share | R.W. Baird"

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock, par value $0.01 per share	R.W. Baird 771 E. Wisconsin Ave Milwaukee WI 53202	2743	488806.7	16340606	04/27/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock, par value $0.01 per share	03/05/2025	Vesting of Equity Award	Kaiser Aluminum Corporation			2743	03/05/2025	Stock Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Kaiser Aluminum Corporation 1550 West McEwen Drive, Suite 500 Franklin TN 37067	Common Stock, par value $0.01 per share	02/23/2026	18461	2309024

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Kaiser Aluminum's (KALU) Form 144 disclose?

It discloses a proposed or recent affiliate sale of common stock and related details. The excerpt lists a vesting on 03/05/2025 for 2,743 shares and 18,461 shares shown as sold in the past three months; R.W. Baird is named as broker.

How many shares vested for the Kaiser Aluminum filing?

The filing shows a vesting of 2,743 shares on 03/05/2025. That line is labeled "Vesting of Equity Award" and tied to Kaiser Aluminum Corporation under stock compensation; no proceeds or exercise price are provided in the excerpt.

What quantity does the filing list as sold in the past three months?

The excerpt lists 18,461 shares in the "Securities Sold During The Past 3 Months" column. The same row shows an adjacent number 2,309,024; the filing excerpt does not state the exact meaning of that adjacent figure within the provided text.

Which broker-dealer is named in the Form 144?

R.W. Baird is identified as the broker-dealer on the filing. The broker entry includes an address for R.W. Baird and is linked to the line showing 2,743 and other table values; the excerpt does not include execution or proceeds details.