FirstEnergy (FE) COO updates RSU vesting, phantom stock and 401(k) holdings

Rhea-AI Filing Summary

FirstEnergy Corp’s Chief Operating Officer, Toby L. Thomas, reported multiple equity-related transactions tied to vesting awards and deferred compensation, not open‑market trading. Performance-adjusted restricted stock units converted one-for-one into common shares, with 24,155.778 shares delivered and 11,681 new common shares granted as an additional award.

To cover tax obligations on the vesting, 1,540 shares of common stock were automatically withheld, and additional shares were surrendered back to the company. Separately, 13,658 share-based RSUs were deferred into an equal number of phantom stock units under a deferred compensation plan, which will be settled in common stock upon death, disability, or termination. Thomas also reports an estimated 696.197 common shares held 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^*

Thomas Toby L.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operating Officer

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		11,681(1)	A	$0	37,583.865	D
Common Stock	03/01/2026		M		24,155.778(2)	A	(3)	61,739.643	D
Common Stock	03/01/2026		F		1,540(4)	D	$50.97	60,199.643	D
Common Stock	03/01/2026		D		8,088.778(5)	D	$50.97	52,110.865	D
Common Stock	03/01/2026		D		13,658(6)	D	$50.97	38,452.865	D
Common Stock								696.197(7)	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	(8)	03/01/2026		M			24,155.778	(2)	(2)	Common Stock	24,155.778	$0	0	D
Phantom 3/26D	(9)	03/01/2026		A		13,658		(10)	(10)	Common Stock	13,658	$50.97	13,658	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. In connection with the vesting of the Share-Based RSUs on March 1, 2026, the reporting person's receipt of 13,657 shares of the Company's common stock was deferred, resulting in the reporting person receiving instead 13,657 shares of phantom stock pursuant to the Company's deferred compensation plan. The reporting person is therefore reporting the disposition of 13,657 shares of common stock in exchange for an equal number of shares of phantom stock.

7. 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.

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

9. Each share of phantom stock represents a right to receive one share of the Company's common stock.

10. The phantom stock becomes payable upon the reporting person's death, disability or termination of employment with the Company.

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

What insider transactions did FirstEnergy (FE) COO Toby L. Thomas report?

Toby L. Thomas reported vesting of performance-adjusted RSUs into common stock, a new common stock grant, automatic share withholding for taxes, and deferral of certain vested shares into phantom stock units under a deferred compensation plan, plus updated 401(k) plan holdings.

Did FirstEnergy (FE) COO Thomas buy or sell common stock on the open market?

The transactions reflect equity award vesting, grants, tax-withholding dispositions, and deferrals into phantom stock, not open‑market buying or selling. Shares were delivered, withheld to satisfy tax obligations, exchanged for phantom stock, and reported as held through the company’s 401(k) savings plan.

What are the phantom stock and RSU awards reported by FirstEnergy (FE) COO?

Thomas deferred 13,658 vested share-based RSUs into 13,658 phantom stock units, each representing one share of FirstEnergy common stock. The phantom stock pays out in shares upon death, disability, or termination. Additional time-based RSUs vest fully on March 1, 2029, if service conditions are met.

How were taxes handled on the FirstEnergy (FE) COO’s vested RSUs?

Shares of FirstEnergy common stock were automatically withheld to cover tax obligations when share-based RSUs vested on March 1, 2026. The disposition is described as payment of exercise price or tax liability by delivering securities and is exempt under Rule 16b‑3, reducing shares received net of taxes.

What 401(k) holdings did FirstEnergy (FE) COO Toby L. Thomas report?

Thomas reported an estimated 696.197 shares of FirstEnergy common stock held indirectly through a unitized stock fund in the company’s 401(k) Savings Plan. This estimate reflects allocations to his account, including dividend reinvestment and company match features, as of February 28, 2026.