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| FIRSTENERGY CORP. |
| LIST OF SUBSIDIARIES OF THE REGISTRANT |
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| As of |
| December 31, 2024 |
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| FirstEnergy Service Company - Incorporated in Ohio |
| FirstEnergy Pennsylvania Electric Company - Incorporated in Pennsylvania |
| FirstEnergy Transmission, LLC - Organized in Delaware |
| FirstEnergy Ventures Corp. - Incorporated in Ohio |
| Jersey Central Power & Light Company - Incorporated in New Jersey |
| Monongahela Power Company - Incorporated in Ohio |
| Ohio Edison Company - Incorporated in Ohio |
| The Cleveland Electric Illuminating Company - Incorporated in Ohio |
| The Potomac Edison Company - Incorporated in Maryland |
| The Toledo Edison Company - Incorporated in Ohio |
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