TIERNEY BRIAN X 4

What Happened
Brian X. Tierney, FirstEnergy Corp.'s Chairman, President & CEO (and a director), had 16,991 shares of FirstEnergy common stock disposed on June 1, 2026 to satisfy tax withholding obligations. The shares were withheld at $45.90 per share, totaling approximately $779,853. This disposition was done as part of withholding for the vesting of 38,095 restricted shares granted June 1, 2023 — a routine tax-withholding event rather than an open-market sale.

Key Details

• Transaction date and price: June 1, 2026 — 16,991 shares withheld at $45.90/share (total ~$779,853).
• Transaction type: Code F — shares withheld to satisfy tax withholding upon RSU vesting (not a discretionary sale).
• Vesting detail: 38,095 restricted shares vested; 16,991 were withheld for taxes, so 21,104 net shares were delivered to the reporting person.
• Shares owned after transaction: Not specified in this filing.
• Filing timeliness: Report filed June 3, 2026 (two days after the transaction) — appears timely.
• Relevant footnotes:
  • F1: Withholding to satisfy tax obligation on the June 1, 2023 RSU award vesting.
  • F2: Reported balance updated to include dividend reinvestments.
  • F3: Notes an estimated number of shares indirectly held in the company 401(k) unitized stock fund (includes dividend reinvestment and company match).

Context
This was a tax-withholding (cashless-like) disposition tied to RSU vesting rather than an opportunistic open-market sale; such withholdings are common and typically do not signal management sentiment about the stock. The filing also notes dividend reinvestments and 401(k) plan holdings that affect the reporting person's total share balance.