X0508 4 2026-02-11 0001031296 FIRSTENERGY CORP FE 0001322841 Park Hyun 341 WHITE POND DRIVE AKRON OH 44320 1 SVP & CLO 0 Common Stock 84252.35 D Common Stock 1311.917 I By Savings Plan Common Stock 5 I Held by Park Family Trust RSU 2026-02-11 4 A 0 38321.003 0 A Common Stock 38321.003 38321.003 D Balance updated to include dividends accrued on time-based equity awards. FirstEnergy Corp.'s (the "Company") 401(k) Savings Plan includes a unitized fund invested shares of common stock of the Company stock, in which the reporting person may invest, and includes dividend reinvestment and company match features. The number of shares reported as indirectly held in the 401(K) Savings Plan in this row is an estimate of the number of shares of the Company's common stock held in the unitized stock fund since the reporting person's last filed Form 4 and as allocated to the reporting person's account as of January 31, 2026. Represents performance-adjusted restricted stock units ("RSUs") awarded on March 1, 2023, each of which represents a contingent right to receive an award payable 2/3 in Company common stock and 1/3 in cash following the vesting date. This Form 4 is being filed to report the satisfaction of the performance goals for the RSUs, as certified by the Company's Board of Directors on February 11, 2026. As a result, these RSUs will vest on March 1, 2026, generally subject to the reporting person's continued service. /s/ Mary M. Swann, attorney-in-fact 2026-02-13