Report of Proposed Sale of Securities (144)

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: Issuer Information

Name of Issuer	KAISER ALUMINUM CORP
SEC File Number	001-09447
Address of Issuer	1550 West McEwen Drive Suite 500 Franklin TENNESSEE 37067
Phone	[phone]
Name of Person for Whose Account the Securities are To Be Sold	JENNIFER S HUEY
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	Director

144: Securities Information

Record	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
#1	comm	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NEW JERSEY 07086	250	$17,370	15,977,375	06/12/2023	NASDAQ

144: Securities To Be Sold

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:

Record	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 *
#1	comm	03/05/2019	ESOP	KAISER ALUMINUM CORP	☐	—	84	06/12/2023	cash
#2	comm	03/05/2021	ESOP	KAISER ALUMINUM CORP	☐	—	165	06/12/2023	cash
#3	comm	03/05/2022	ESOP	KAISER ALUMINUM CORP	☐	—	1	06/12/2023	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.

144: Securities Sold During The Past 3 Months

Nothing to Report

☒

144: Remarks and Signature

Remarks
Date of Notice	06/12/2023
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	/s/ UBS Financial Services Inc, as attorney-in-fact for JENNIFER S HUEY
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)