Vanguard disaggregates holdings; KALU ownership reported at 0% (KALU)

Rhea-AI Filing Summary

The Vanguard Group filed Amendment No. 15 to a Schedule 13G/A reporting 0 shares and 0% beneficial ownership of Kaiser Aluminum Corp common stock (CUSIP 483007704) after an internal realignment. The filing states certain subsidiaries and business divisions will report separately in reliance on SEC Release No. 34-39538, and that The Vanguard Group, Inc. no longer is deemed to have beneficial ownership of securities held by those entities. The amendment was signed on 03/27/2026 and references the internal realignment effective 01/12/2026.

Insights

Institutional Ownership Analyst

Vanguard disaggregated holdings; reported zero ownership in Kaiser Aluminum.

The filing documents an internal reorganization that disaggregates certain subsidiaries and business divisions, resulting in a reported 0% beneficial ownership position in Kaiser Aluminum common stock as of the amendment. The CUSIP is 483007704.

This change is an administrative ownership reporting effect tied to SEC Release No. 34-39538; the realignment effective 01/12/2026 shifts reporting to separate entities rather than indicating a market sale. Subsequent filings from the newly reporting entities may show positions.

Securities Compliance Counsel

Filing aligns with SEC guidance for disaggregated reporting after internal reorganization.

The amendment cites reliance on SEC Release No. 34-39538 and explains that subsidiaries/business divisions will report separately, which is a recognized method to reflect internal changes in voting/dispositive power. The statement clarifies Vanguard no longer is deemed to beneficially own those subsidiary-held securities.

Filing formalities are evident: the amendment is signed by the Head of Global Fund Administration on 03/27/2026. Timing and positions of successor filers are not included here; future Schedule 13 filings by those entities may follow.

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Accepted by SEC EDGAR 03/27/2026 - 10:18 AM Learn about SEC filing dates

FAQ

What does Vanguard report about KALU ownership in this Schedule 13G/A amendment?

Direct answer: Vanguard reports 0 shares and 0% beneficial ownership of Kaiser Aluminum common stock. Supporting context: The amendment attributes this to an internal realignment and disaggregation under SEC Release No. 34-39538, effective 01/12/2026.

Why does The Vanguard Group say it no longer beneficially owns certain securities?

Direct answer: Because Vanguard disaggregated subsidiaries/divisions after an internal realignment. Supporting context: The filing cites reliance on SEC Release No. 34-39538, stating those subsidiaries will report beneficial ownership separately from Vanguard.

Does this amendment indicate Vanguard sold Kaiser Aluminum shares?

Direct answer: No; the amendment describes an internal realignment and separate reporting by subsidiaries. Supporting context: The text states Vanguard "no longer has, or is deemed to have, beneficial ownership" due to disaggregation rather than documenting a sale.

When did the internal realignment referenced in the filing occur?

Direct answer: The filing references an internal realignment effective 01/12/2026. Supporting context: The amendment (signed 03/27/2026) explains post‑realignment reporting changes under SEC Release No. 34-39538.

Who signed the Schedule 13G/A amendment for Vanguard?

Direct answer: The amendment is signed by Ashley Grim, Head of Global Fund Administration. Supporting context: The signature block shows the filing date as 03/27/2026 and lists Vanguard's Malvern, PA address.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 15)

Kaiser Aluminum Corp

(Name of Issuer)

Common Stock

(Title of Class of Securities)

483007704

(CUSIP Number)

03/13/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 483007704

1

Names of Reporting Persons

The Vanguard Group

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: On January 12, 2026, The Vanguard Group, Inc. went through an internal realignment. In accordance with SEC Release No. 34-39538 (January 12, 1998), certain subsidiaries or business divisions of subsidiaries of The Vanguard Group, Inc., that formerly had, or were deemed to have, beneficial ownership with The Vanguard Group, Inc., will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on such release. These subsidiaries and/or business divisions pursue the same investment strategies as previously pursued by The Vanguard Group, Inc. prior to the realignment. Further in accordance with SEC Release No. 34-39538 (January 12, 1998), The Vanguard Group, Inc. no longer has, or is deemed to have, beneficial ownership over securities beneficially owned by such subsidiaries and/or business divisions.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Kaiser Aluminum Corp
(b)	Address of issuer's principal executive offices: 1550 W Mcewen Dr, Suite 500, Franklin, TN, 37067
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd.,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 0
(b)	Percent of class: 0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Vanguard Group, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	03/27/2026