Form 144: Proposed sale notice for KALU

The filing is a Form 144 notice related to proposed sales of common stock associated with restricted stock awards.

Rhea-AI Filing Summary

The filing is a Form 144 notice related to proposed sales of common stock associated with restricted stock awards. It lists numeric entries including 262,615.00 and 16,340,606 with an 04/29/2026 date and two Restricted Stock Award entries: 311 (04/17/2024) and 1,213 (06/07/2024).

Key Figures

Reported numeric entry: 262,615.00 Reported numeric entry: 16,340,606 Restricted Stock Award: 311 shares +1 more

4 metrics

Reported numeric entry 262,615.00 listed alongside filing entries with date <date>04/29/2026</date>

Reported numeric entry 16,340,606 listed alongside filing entries with date <date>04/29/2026</date>

Restricted Stock Award 311 shares award dated <date>04/17/2024</date>

Restricted Stock Award 1,213 shares award dated <date>06/07/2024</date>

Key Terms

Form 144, Restricted Stock Award, Equity Compensation

3 terms

Form 144 regulatory

"listed as the filing type and header for proposed sales"

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.

Restricted Stock Award financial

"Restricted Stock Award | Issuer | Equity Compensation"

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

Equity Compensation financial

"Equity Compensation Common referenced for award entries"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

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

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Accepted by SEC EDGAR 04/29/2026 - 10:04 AM EDT Learn about SEC filing dates

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	0001972491
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	KAISER ALUMINUM CORP
SEC File Number	001-09447
Address of Issuer	1550 W. MCEWEN DRIVE, SUITE 500 FRANKLIN TENNESSEE 37067
Phone	6292527040
Name of Person for Whose Account the Securities are To Be Sold	Grimley Richard P.
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

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	Charles Schwab Corporation 3000 Schwab Way Westlake TX 76262	1524	262615.00	16340606	04/29/2026	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	04/17/2024	Restricted Stock Award	Issuer			311	04/17/2024	Equity Compensation
Common	06/07/2024	Restricted Stock Award	Issuer			1213	06/07/2024	Equity 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	04/29/2026
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	RICHARD PAUL GRIMLEY
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)