Kaiser Aluminum (NASDAQ: KALU) lists multiple share lots for resale under Rule 144

Rhea-AI Filing Summary

Kaiser Aluminum submitted a Form 144 reporting proposed sales of Common Stock by an affiliate/holder under Rule 144. The filing lists multiple proposed sale entries dated 07/27/2022, 03/05/2024, 03/05/2025, and 03/05/2026 with specified share counts.

Insights

Compliance Analyst

Routine Rule 144 notice describing proposed resale transactions.

The filing lists specific share lots and dates for proposed sales under Rule 144; it does not itself report completed transactions or proceeds. The entries appear to reflect compensatory or affiliated-holder sales rather than an issuer sale.

Cash‑flow treatment and whether sales occurred are not stated; subsequent filings would show executed dispositions.

Key Figures

Proposed sale lot: 10,082 shares Proposed sale lot: 5,604 shares Proposed sale lot: 7,809 shares +3 more

6 metrics

Proposed sale lot 10,082 shares dated 07/27/2022

Proposed sale lot 5,604 shares dated 03/05/2024

Proposed sale lot 7,809 shares dated 03/05/2025

Proposed sale lot 7,537 shares dated 03/05/2025

Proposed sale lot 19,000 shares dated 03/05/2026

Shares disclosed with date 16,340,606 as of 04/27/2026 (figure shown in excerpt)

Key Terms

Form 144, Rule 144, Compensation

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

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.

Rule 144 regulatory

"144: Securities Sold During The Past 3 Months"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Compensation financial

"Common | 07/27/2022 | Compensation | Kaiser Aluminum"

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	Merrill 39001 W 12 Mile Rd Farmington Hills MI 48331	50032	8755600	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	07/27/2022	Compensation	Kaiser Aluminum			10082	07/27/2022	N/A
Common	03/05/2024	Compensation	Kaiser Aluminum			5604	03/05/2024	N/A
Common	03/05/2025	Compensation	Kaiser Aluminum			7809	03/05/2025	N/A
Common	03/05/2025	Compensation	Kaiser Aluminum			7537	03/05/2025	N/A
Common	03/05/2026	Compensation	Kaiser Aluminum			19000	03/05/2026	N/A

* 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

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 Form 144 (KALU) report?

It reports proposed resale of common stock by an affiliate or holder under Rule 144. The filing lists dated lots and share counts (e.g., 10,082 on 07/27/2022 and 19,000 on 03/05/2026), not completed sales or proceeds.

Does the Form 144 show completed share sales for KALU?

No — it shows proposed sales, not executed trades. Form 144 is a notice of intent to sell under Rule 144; any actual sale would appear later in trade reports or Form 4/5 filings if required.

How many shares are listed in the filing for potential sale?

The filing lists multiple lots: 10,082; 5,604; 7,809; 7,537; and 19,000 shares. These are dated entries tied to specific dates between 07/27/2022 and 03/05/2026 shown in the excerpt.

Is the issuer receiving proceeds from these sales reported in the Form 144?

The filing does not state proceeds treatment. Form 144 typically notifies potential resale under Rule 144; the excerpt does not indicate whether proceeds go to the issuer or selling holder.

What does the listing '16,340,606 as of 04/27/2026' refer to?

The excerpt shows the figure 16,340,606 with the date 04/27/2026. The filing text presents this number and date together; the excerpt does not explicitly label it, so it is presented as a disclosed numeric item in the entry.