SCHEDULE 13D/A

FIRSTENERGY CORP COM

Common Stock, par value $0.10 · CUSIP: 337932107

Event date: 2025-08-22

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Blackstone Holdings III L.P.Reported CIK 0001404073

  Shares: 28,832,099 · Class: 4.99%

• BIP Securities II-B L.P.

  Shares: 25,096,082 · Class: 4.35%

• BIP-V Securities II-B L.P.

  Shares: 3,736,017 · Class: 0.65%

• BIP Holdings Manager L.L.C.Reported CIK 0001770015

  Shares: 28,832,099 · Class: 4.99%

• Blackstone Infrastructure Associates L.P.Reported CIK 0001770053

  Shares: 28,832,099 · Class: 4.99%

• BIA GP L.P.Reported CIK 0001770017

  Shares: 28,832,099 · Class: 4.99%

• BIA GP L.L.C.Reported CIK 0001770016

  Shares: 28,832,099 · Class: 4.99%

• Blackstone Holdings III GP L.P.Reported CIK 0001478809

  Shares: 28,832,099 · Class: 4.99%

• Blackstone Holdings III GP Management L.L.C.Reported CIK 0001478815

  Shares: 28,832,099 · Class: 4.99%

• Blackstone Inc.Reported CIK 0001393818

  Shares: 28,832,099 · Class: 4.99%

• Blackstone Group Management L.L.C.Reported CIK 0001404071

  Shares: 28,832,099 · Class: 4.99%

• Stephen A. SchwarzmanReported CIK 0001070844

  Shares: 28,834,842 · Class: 4.99%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.