Kaiser Aluminum (KALU) proposes sales via UBS: 1,848 RSU; 4,069 PSA

Rhea-AI Filing Summary

Kaiser Aluminum reports a Form 144 notice reporting proposed sales of common stock through UBS Financial Services Inc. The filing lists proposed transactions dated 03/05/2026 comprising 1,848 RSU-derived shares, 4,069 under a PSA, and 1,194 RSU-derived shares. The filing also discloses 15,231 common shares sold during the prior three months on 02/23/2026.

Insights

Securities Compliance Counsel

Form 144 lists proposed resale transactions and a recent three-month sale tally.

The filing names UBS Financial Services Inc. as the broker and shows proposed sale dates of 03/05/2026 with discrete line items: 1,848 RSU shares, 4,069 PSA shares, and 1,194 RSU shares. These are typical notice filings for planned brokered dispositions.

Cash‑flow treatment and whether sales are subject to any holder limits are not specified in the excerpt; subsequent transaction statements or broker reports will show execution details and proceeds.

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	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	7111	797415.9	16210443	03/23/2026	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	03/05/2026	RSU	Kaiser Aluminum			1848	03/23/2026	cash
common	03/05/2026	PSA	Kaiser Aluminum			4069	03/23/2026	cash
common	03/05/2026	RSU	Kaiser Aluminum			1194	03/23/2026	cash

* 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 1550 West McEwen Drive Suite 500 Franklin TN 37067	common	02/23/2026	15231	1875645

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)