As of November 6, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Constellation Energy Corp. The largest reported stake is Vanguard Capital Management's, at 6.39%. 6 filings are on record since January 14, 2026 (Schedule 13G, April 29, 2026).
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Key facts
- · Reporting person: ECP ControlCo, LLC · Sole voting: 0 · Shared voting: 14,443,227 · Sole dispositive: 0 · Shared dispositive: 14,443,227 · SCHEDULE 13G/A, 2026-08-07
- · Reporting person: Capital International Investors · Sole voting: 11,704,952 · Shared voting: 0 · Sole dispositive: 11,940,831 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-14
- · Reporting person: Vanguard Capital Management · Sole voting: 3,035,738 · Shared voting: 0 · Sole dispositive: 23,174,480 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-29
- · Reporting person: The Vanguard Group · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-03-26
- · Holder: Capital International Investors · Percent: 5.5% · SCHEDULE 13G/A
Constellation Energy Corp has 6 Schedule 13D or 13G filings on record since 2026-01-14. 1 holder's 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 |
|---|---|---|---|---|
| Vanguard Capital Management | 6.39% | 23,174,480 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| ECP ControlCo, LLC | 4% | 14,443,227 | SCHEDULE 13G/A, 2026-08-07 | 2026-06-30 |
| Capital International Investors | 3.3% | 11,940,831 | SCHEDULE 13G/A, 2026-05-14 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on Constellation Energy Corp and the records around it.
Constellation Energy Corp elsewhere on the record
- Leadership changes Aug 2026
- Who owns it
Companies that share a holder
- ECP ControlCo, LLC also filed stake reports on 2 other companies: Talen Energy Corp (Jun 2026), Shenandoah Telecommunications Company (Aug 2025)
- Capital International Investors also filed stake reports on 96 other companies: Aurora Innovation, Inc. (Nov 2026), Arxis, Inc. (Aug 2026), Astronics Corp. (Aug 2026)
- Vanguard Capital Management also filed stake reports on 1495 other companies: A10 Networks Inc (Oct 2026), Altisource Portfolio Solutions SA (Oct 2026), Alto Neuroscience Inc (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Vanguard Capital Management | 3,035,738 | 0 | 23,174,480 | 0 | SCHEDULE 13G, 2026-04-29 |
| ECP ControlCo, LLC | 0 | 14,443,227 | 0 | 14,443,227 | SCHEDULE 13G/A, 2026-08-07 |
| Energy Capital Partners III, LLC | 0 | 7,232,996 | 0 | 7,232,996 | SCHEDULE 13G/A, 2026-08-07 |
| Energy Capital Partners IV, LLC | 0 | 1,466,151 | 0 | 1,466,151 | SCHEDULE 13G/A, 2026-08-07 |
| ECP Calpine GP, LLC | 0 | 5,744,080 | 0 | 5,744,080 | SCHEDULE 13G/A, 2026-08-07 |
| ECP III Volt Holdings, LLC | 0 | 69,149 | 0 | 69,149 | SCHEDULE 13G/A, 2026-08-07 |
| ECP III-A Volt Holdings, LLC | 0 | 2,327,800 | 0 | 2,327,800 | SCHEDULE 13G/A, 2026-08-07 |
| ECP III-B Volt Holdings, LLC | 0 | 281,120 | 0 | 281,120 | SCHEDULE 13G/A, 2026-08-07 |
| ECP III-C Volt Holdings, LP | 0 | 962,349 | 0 | 962,349 | SCHEDULE 13G/A, 2026-08-07 |
| ECP III-D Volt Holdings, LP | 0 | 1,187,704 | 0 | 1,187,704 | SCHEDULE 13G/A, 2026-08-07 |
| ECP Checkerspot Holdings, LP | 0 | 2,404,874 | 0 | 2,404,874 | SCHEDULE 13G/A, 2026-08-07 |
| ECP IV-A Volt Holdings, LP | 0 | 351,240 | 0 | 351,240 | SCHEDULE 13G/A, 2026-08-07 |
| ECP IV-B Volt Holdings, LP | 0 | 58,863 | 0 | 58,863 | SCHEDULE 13G/A, 2026-08-07 |
| ECP IV-C Volt Holdings, LP | 0 | 291,129 | 0 | 291,129 | SCHEDULE 13G/A, 2026-08-07 |
| ECP IV-D Volt Holdings, LP | 0 | 764,919 | 0 | 764,919 | SCHEDULE 13G/A, 2026-08-07 |
| ECP Calpine Fund GP, LP | 0 | 5,744,080 | 0 | 5,744,080 | SCHEDULE 13G/A, 2026-08-07 |
| ECP Calpine Continuation Fund, LP | 0 | 4,702,479 | 0 | 4,702,479 | SCHEDULE 13G/A, 2026-08-07 |
| ECP Calpine Rollover Fund, LP | 0 | 399,812 | 0 | 399,812 | SCHEDULE 13G/A, 2026-08-07 |
| Capital International Investors | 11,704,952 | 0 | 11,940,831 | 0 | SCHEDULE 13G/A, 2026-05-14 |
| The Vanguard Group | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-03-26 |
The latest filing identifies Constellation Energy Corp by CUSIP 21037T109 and gives its principal executive office as 1310 Point Street, Baltimore, MD 21231 (SCHEDULE 13G/A, 2026-08-07).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-01-14 | ECP ControlCo, LLC | 6.1% | SCHEDULE 13G |
| 2026-02-13 | Capital International Investors | 5.5% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 6.39% | SCHEDULE 13G |
| 2026-05-14 | Capital International Investors | 3.3% | SCHEDULE 13G/A |
| 2026-08-07 | ECP ControlCo, LLC | 4% | SCHEDULE 13G/A |
Questions about who owns Constellation Energy Corp
Who owns Constellation Energy Corp?
On this page, one holder's latest ownership filing reports 5% or more of Constellation Energy Corp: Vanguard Capital Management (6.39%, Schedule 13G, filed 2026-04-29).
When did Vanguard Capital Management buy into Constellation Energy Corp?
The filings give report dates, not purchase dates. The earliest filing from Vanguard Capital Management on this page is the Schedule 13G, filed 2026-04-29, reporting 6.39%.
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%); 6 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 Constellation Energy Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 5, 2026 | Leadership change: Robert Lawless departs, Chair of the Board, and 3 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.