FirstEnergy (FE) CEO Tierney details RSU vesting, tax withholdings and new grant

Rhea-AI Filing Summary

FirstEnergy Corp Chairman, President and CEO Brian Tierney reported multiple equity compensation transactions involving company stock. On March 1, 2026, performance-adjusted restricted stock units converted into 229,580.554 shares of common stock on a one-for-one basis under the 2020 Incentive Compensation Plan. To cover tax obligations on the share-based RSU vesting, 68,362 shares were automatically withheld at $50.97 per share, and additional shares were disposed of back to the company. Tierney also received a grant of 80,342 time-based restricted stock units that will vest in full on March 1, 2029. Following these transactions, he held 453,219.084 shares directly, plus an estimated 930.435 shares indirectly through the company’s 401(k) Savings Plan.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

TIERNEY BRIAN X

(Last) (First) (Middle)

341 WHITE POND DRIVE

(Street)

AKRON OH 44320

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
FIRSTENERGY CORP [ FE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman, President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/01/2026		A		80,342(1)	A	$0	453,219.084	D
Common Stock	03/01/2026		M		229,580.554(2)	A	(3)	682,799.638	D
Common Stock	03/01/2026		F		68,362(4)	D	$50.97	614,437.638	D
Common Stock	03/01/2026		D		76,302.554(5)	D	$50.97	538,135.084	D
Common Stock								930.435(6)	I	By Savings Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
RSU	(7)	03/01/2026		M			229,580.554	(2)	(2)	Common Stock	229,580.554	$0	0	D

Explanation of Responses:

1. These securities are time-based restricted stock units, each representing a contingent right to receive one share of common stock, par value $0.10 per share, of FirstEnergy Corp. (the "Company"). The time-based restricted stock units were granted under the Company's 2020 Incentive Compensation Plan and will vest in full on March 1, 2029.

2. Represents the vesting of performance-adjusted restricted stock units ("RSUs"), each of which previously represented a contingent right to receive an RSU award payable 2/3 in shares of common stock of the Company ("Share-Based RSUs") and 1/3 in cash ("Cash-Based RSUs") following the vesting date. The satisfaction of the performance goals for the RSUs were certified by the Company's Board of Directors on February 11, 2026, as previously reported on a Form 4 filed on February 13, 2026, and the RSUs, which had remained subject to a continued service requirement, vested on March 1, 2026.

3. The RSUs converted into shares of the Company's common stock on a one-for-one basis under the Company 2020 Incentive Compensation Plan.

4. Represents shares of common stock of the Company automatically withheld to cover tax obligations associated with the vesting on March 1, 2026, of the Share-Based RSUs described in footnote 2, which transaction is exempt under Rule 16b-3.

5. On March 1, 2026, the Cash-Based RSUs were settled based on an average of the Company's high and low stock price on February 27, 2026, net of applicable tax withholding obligations.

6. The Company 401(k) Savings Plan ("401(k) Plan") includes a unitized fund invested in shares of common stock of the Company, 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) 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 February 28, 2026.

7. RSUs convert into the Company's common stock on a one-for-one basis.

	/s/ Mary M. Swann, attorney-in-fact	03/03/2026
	** Signature of Reporting Person	Date
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FAQ

What insider transactions did FE CEO Brian Tierney report on March 1, 2026?

Brian Tierney reported RSU vesting, tax-related share withholding, dispositions to FirstEnergy, and a new RSU grant. Performance-adjusted RSUs converted into 229,580.554 common shares, with some shares withheld and returned to the issuer, reflecting routine equity compensation activity.

How many FirstEnergy (FE) shares did Brian Tierney receive from RSU conversion?

Tierney received 229,580.554 FirstEnergy common shares from performance-adjusted RSUs converting one-for-one. These RSUs vested after the Board certified performance goals and satisfied a continued service requirement, moving from contingent awards into directly held common stock.

Were any of Brian Tierney’s FirstEnergy (FE) transactions open-market sales?

The reported dispositions were not open-market sales. Shares were automatically withheld to satisfy tax obligations and some were disposed of back to FirstEnergy. These events are described as tax-withholding and issuer dispositions under equity compensation arrangements, not discretionary market trades.

What new restricted stock units did FE grant to Brian Tierney in this Form 4?

Tierney received 80,342 time-based restricted stock units under the 2020 Incentive Compensation Plan. Each RSU represents a contingent right to one FE common share and will vest in full on March 1, 2029, if the applicable service condition is met.

How many FirstEnergy (FE) shares does Brian Tierney hold after these transactions?

After the reported transactions, Tierney directly held 453,219.084 FE common shares. He also had an estimated 930.435 shares indirectly through the company’s unitized 401(k) Savings Plan fund, based on allocations as of February 28, 2026.

How were the Cash-Based RSUs for FirstEnergy (FE) CEO Brian Tierney settled?

Cash-Based RSUs were settled in cash, not additional shares. The settlement amount was based on the average of FirstEnergy’s high and low stock prices on February 27, 2026, net of applicable tax withholding obligations, following the March 1, 2026 vesting date.