On the Record · Firstenergy
Firstenergy subsidiaries, as it lists them
The subsidiaries Firstenergy lists in its latest annual report, with the jurisdiction of each, linked to the filing.
Subsidiaries it lists
| Subsidiary | Jurisdiction |
|---|---|
| FirstEnergy Service Company | Ohio |
| FirstEnergy Pennsylvania Holding Company | Pennsylvania |
| FirstEnergy Transmission, LLC | Delaware |
| FirstEnergy Ventures Corp. | Ohio |
| Jersey Central Power & Light Company | New Jersey |
| Monongahela Power Company | Ohio |
| Ohio Edison Company | Ohio |
| The Cleveland Electric Illuminating Company | Ohio |
| The Potomac Edison Company | Maryland |
| The Toledo Edison Company | Ohio |
From Exhibit 21 of the 10-K for 2025. Companies must list their significant subsidiaries there and may leave out smaller ones, so this is the company’s own list, not every entity it owns.
Read from Firstenergy’s annual reports (10-K for 2025, 10-K for 2024, 10-K for 2023) and the financial data it files with the SEC, as of 2026-02-18. Every quotation is word for word from the filing linked beside it; how these pages are built and checked. The full record is in its company data sheet.