As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of FirstEnergy Corp. The largest reported stake is Capital World Investors', at 13.6%. 4 filings are on record since August 13, 2025 (Schedule 13G/A, August 13, 2025).
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Key facts
- · Reporting person: Vanguard Capital Management · Sole voting: 5,597,518 · Shared voting: 0 · Sole dispositive: 40,323,599 · 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: Blackstone Holdings III L.P. · Percent: 4.99% · Shares: 28,832,099 · SCHEDULE 13D/A
- · Reporting person: Capital World Investors · Sole voting: 78,047,052 · Shared voting: 0 · Sole dispositive: 78,489,719 · Shared dispositive: 0 · SCHEDULE 13G/A, 2025-08-13
FirstEnergy Corp has 4 Schedule 13D or 13G filings on record since 2025-08-13. 2 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 |
|---|---|---|---|---|
| Capital World Investors | 13.6% | 78,489,719 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
| Vanguard Capital Management | 6.98% | 40,323,599 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| Blackstone Holdings III L.P. | 4.99% | 28,832,099 | SCHEDULE 13D/A, 2025-08-22 | 2025-08-22 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on FirstEnergy Corp and the records around it.
FirstEnergy Corp elsewhere on the record
Companies that share a holder
- Blackstone Holdings III L.P. also filed stake reports on 4 other companies: Liftoff Mobile, Inc. (Nov 2026), Bumble Inc. (Oct 2026), Blackstone Digital Infrastructure Trust Inc. (May 2026)
- Capital World Investors also filed stake reports on 125 other companies: New Fortress Energy Inc. (Oct 2026), Aura Minerals Inc. (Oct 2026), Skyworks Solutions, Inc. (Oct 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 |
|---|---|---|---|---|---|
| Capital World Investors | 78,047,052 | 0 | 78,489,719 | 0 | SCHEDULE 13G/A, 2025-08-13 |
| Vanguard Capital Management | 5,597,518 | 0 | 40,323,599 | 0 | SCHEDULE 13G, 2026-04-29 |
| Blackstone Holdings III L.P. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| BIP Securities II-B L.P. | 25,096,082 | 0 | 25,096,082 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| BIP-V Securities II-B L.P. | 3,736,017 | 0 | 3,736,017 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| BIP Holdings Manager L.L.C. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Blackstone Infrastructure Associates L.P. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Bia Gp L.P. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Bia Gp L.L.C. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Blackstone Holdings III GP L.P. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Blackstone Holdings III GP Management L.L.C. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Blackstone Inc. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Blackstone Group Management L.L.C. | 28,832,099 | 0 | 28,832,099 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| Stephen A. Schwarzman | 28,834,842 | 0 | 28,834,842 | 0 | SCHEDULE 13D/A, 2025-08-22 |
| The Vanguard Group | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-03-26 |
The latest filing identifies FirstEnergy Corp by CUSIP 337932107 and gives its principal executive office as 76 South Main Street, 18th Floor, Akron, OH 44308 (SCHEDULE 13G, 2026-04-29).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Capital World Investors | 13.6% | SCHEDULE 13G/A |
| 2025-08-22 | Blackstone Holdings III L.P. | 4.99% | SCHEDULE 13D/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 6.98% | SCHEDULE 13G |
Questions about who owns FirstEnergy Corp
Who owns FirstEnergy Corp?
On this page, 2 holders' latest ownership filings report 5% or more of FirstEnergy Corp: Capital World Investors (13.6%, Schedule 13G/A, filed 2025-08-13) and Vanguard Capital Management (6.98%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of FirstEnergy Corp?
By the share each holder's latest filing reports, the largest holders of FirstEnergy Corp on this page are Capital World Investors (13.6%) and Vanguard Capital Management (6.98%).
When did Capital World Investors buy into FirstEnergy Corp?
The filings give report dates, not purchase dates. The earliest filing from Capital World Investors on this page is the Schedule 13G/A, filed 2025-08-13, reporting 13.6%. 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%); 4 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.
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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.