As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Kaiser Aluminum Corp. The largest reported stake is BlackRock, Inc.'s, at 14.8%. 12 filings are on record since August 12, 2025 (Schedule 13G/A, April 24, 2026).
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Key facts
- · Reporting person: Vanguard Portfolio Management · Sole voting: 16,089 · Shared voting: 0 · Sole dispositive: 1,556,558 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-10-30
- · Reporting person: Vanguard Capital Management · Sole voting: 126,318 · Shared voting: 0 · Sole dispositive: 833,479 · Shared dispositive: 0 · SCHEDULE 13G, 2026-07-31
- · Reporting person: Dimensional Fund Advisors LP · Sole voting: 758,606 · Shared voting: 0 · Sole dispositive: 775,944 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-14
- · Reporting person: Nomura Asset Management International Inc. · Sole voting: 0 · Shared voting: 714,176 · Sole dispositive: 0 · Shared dispositive: 714,176 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: State Street Corporation · Sole voting: 0 · Shared voting: 1,289,072 · Sole dispositive: 0 · Shared dispositive: 1,332,923 · SCHEDULE 13G, 2026-05-12
Kaiser Aluminum Corp has 12 Schedule 13D or 13G filings on record since 2025-08-12. 4 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 14.8% | 2,401,692 | SCHEDULE 13G/A, 2026-04-24 | 2026-03-31 |
| Vanguard Portfolio Management | 9.52% | 1,556,558 | SCHEDULE 13G/A, 2026-10-30 | 2026-09-30 |
| State Street Corporation | 8.2% | 1,332,923 | SCHEDULE 13G, 2026-05-12 | 2026-03-31 |
| Vanguard Capital Management | 5.1% | 833,479 | SCHEDULE 13G, 2026-07-31 | 2026-06-30 |
| Barrow Hanley Mewhinney & Strauss LLC | 4.77% | 772,804 | SCHEDULE 13G, 2025-11-12 | 2025-09-30 |
| Dimensional Fund Advisors LP | 4.7% | 775,944 | SCHEDULE 13G/A, 2026-07-14 | 2026-06-30 |
| Nomura Asset Management International Inc. | 4.4% | 714,176 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Macquarie Group Limited | 0% | 0 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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Keep reading
More on Kaiser Aluminum Corp and the records around it.
Kaiser Aluminum Corp elsewhere on the record
- Leadership changes Aug 2026
- Who owns it
Companies that share a holder
- NOMURA ASSET MANAGEMENT INTERNATIONAL INC. also filed stake reports on 7 other companies: ARTIVION, INC. (Aug 2026), IMAX CORP (Aug 2026), MALIBU BOATS, INC. (Aug 2026)
- BARROW HANLEY MEWHINNEY & STRAUSS LLC also filed stake reports on 12 other companies: Axalta Coating Systems Ltd (Aug 2026), Ichor Holdings (Aug 2026), Warner Music Group Corp (Aug 2026)
- Macquarie Group Limited also filed stake reports on 14 other companies: Artivion Inc (Feb 2026), Imax Corp (Feb 2026), Malibu Boats Inc (Feb 2026)
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What the Full Report on Kaiser Aluminum Corp covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Vanguard Portfolio Management | 16,089 | 0 | 1,556,558 | 0 | SCHEDULE 13G/A, 2026-10-30 |
| State Street Corporation | 0 | 1,289,072 | 0 | 1,332,923 | SCHEDULE 13G, 2026-05-12 |
| Ssga Funds Management, Inc. | 0 | 966,168 | 0 | 968,922 | SCHEDULE 13G, 2026-05-12 |
| Vanguard Capital Management | 126,318 | 0 | 833,479 | 0 | SCHEDULE 13G, 2026-07-31 |
| Dimensional Fund Advisors LP | 758,606 | 0 | 775,944 | 0 | SCHEDULE 13G/A, 2026-07-14 |
| Nomura Asset Management International Inc. | 0 | 714,176 | 0 | 714,176 | SCHEDULE 13G/A, 2026-05-15 |
| Nomura Investment Management Business Trust | 0 | 714,176 | 0 | 714,176 | SCHEDULE 13G/A, 2026-05-15 |
The latest filing identifies Kaiser Aluminum Corp by CUSIP 483007704 and gives its principal executive office as 1550 W Mcewen Dr, Suite 500, Franklin, TN 37067 (SCHEDULE 13G/A, 2026-10-30).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | Barrow Hanley Mewhinney & Strauss LLC | 5.39% | SCHEDULE 13G |
| 2025-11-12 | Barrow Hanley Mewhinney & Strauss LLC | 4.77% | SCHEDULE 13G |
| 2026-02-13 | Macquarie Group Limited | 0% | SCHEDULE 13G/A |
| 2026-02-17 | Nomura Asset Management International Inc. | 5.6% | SCHEDULE 13G |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-24 | BlackRock, Inc. | 14.8% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Portfolio Management | 8.13% | SCHEDULE 13G |
| 2026-05-12 | State Street Corporation | 8.2% | SCHEDULE 13G |
| 2026-05-15 | Nomura Asset Management International Inc. | 4.4% | SCHEDULE 13G/A |
| 2026-07-14 | Dimensional Fund Advisors LP | 4.7% | SCHEDULE 13G/A |
| 2026-07-31 | Vanguard Capital Management | 5.1% | SCHEDULE 13G |
| 2026-10-30 | Vanguard Portfolio Management | 9.52% | SCHEDULE 13G/A |
Questions about who owns Kaiser Aluminum Corp
Who owns Kaiser Aluminum Corp?
On this page, 4 holders' latest ownership filings report 5% or more of Kaiser Aluminum Corp: BlackRock, Inc. (14.8%, Schedule 13G/A, filed 2026-04-24), Vanguard Portfolio Management (9.52%, Schedule 13G/A, filed 2026-10-30), State Street Corporation (8.2%, Schedule 13G, filed 2026-05-12) and Vanguard Capital Management (5.1%, Schedule 13G, filed 2026-07-31).
Who are the largest shareholders of Kaiser Aluminum Corp?
By the share each holder's latest filing reports, the largest holders of Kaiser Aluminum Corp on this page are BlackRock, Inc. (14.8%), Vanguard Portfolio Management (9.52%) and State Street Corporation (8.2%).
When did BlackRock, Inc. buy into Kaiser Aluminum Corp?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2026-04-24, reporting 14.8%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Kaiser Aluminum Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 17, 2026 | Leadership change: Fred Stephan appointed, Chief Executive Officer, and 1 more | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.