FE

SEC source: 0001031296-26-000131 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,554.2492

Underlying: Common Stock · 986 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000137 · form4.xml · derivative · entry 2

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,097.8398

Underlying: Common Stock · 986 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000135 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162,136.815

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

F2 · balance_after: Includes shares acquired through dividend reinvestment.

SEC source: 0001031296-26-000133 · form4.xml · derivative · entry 2

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,625.0216

Underlying: Common Stock · 986 shares

Expires not disclosed

F2 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F3 · derivative.exercise_price: 1 for 1

F4 · derivative.exercise_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F4 · derivative.expiration_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F5 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000129 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,554.2492

Underlying: Common Stock · 986 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000127 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,655.572

Underlying: Common Stock · 986 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000125 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,146.462

Underlying: Common Stock · 986 shares

Expires not disclosed

F2 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F3 · derivative.exercise_price: 1 for 1

F4 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F5 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000115 · form4.xml · derivative · entry 2

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,849.616

Underlying: Common Stock · 898 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes phantom stock units acquired through dividend reinvestments.

SEC source: 0001031296-26-000113 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 161,021.599

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

F2 · balance_after: Balance includes shares acquired through dividend reinvestments.

SEC source: 0001031296-26-000111 · form4.xml · derivative · entry 2

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,160.6142

Underlying: Common Stock · 898 shares

Expires not disclosed

F2 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F3 · derivative.exercise_price: 1 for 1

F4 · derivative.exercise_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F4 · derivative.expiration_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F5 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000108 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,371.7865

Underlying: Common Stock · 898 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000106 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,371.7865

Underlying: Common Stock · 898 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000104 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,357.7174

Underlying: Common Stock · 898 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000102 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,008.2534

Underlying: Common Stock · 898 shares

Expires not disclosed

F2 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F3 · derivative.exercise_price: 1 for 1

F4 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F5 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000094 · form4.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 523,810.372

F1 · shares: This Form 4 is being filed to report the number of shares withheld to satisfy the reporting person's tax withholding obligation upon the vesting of 38,095 shares of restricted common stock granted pursuant to the terms of the Restricted Stock Award Agreement, dated June 1, 2023, between FirstEnergy Corp. (the "Company") and the reporting person.

F2 · balance_after: Balance has been updated since the reporting person's last filed Form 4 to include shares acquired through dividend reinvestments.

SEC source: 0001031296-26-000079 · form4.xml · derivative · entry 2

Williams Melvin D. · CIK 0001864882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,290.4465

Underlying: Common Stock · 837 shares

Expires not disclosed

F2 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F3 · derivative.exercise_price: 1 for 1

F4 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F5 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000078 · form4.xml · derivative · entry 2

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,710.2689

Underlying: Common Stock · 837 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes phantom stock units acquired through dividend reinvestments.

SEC source: 0001031296-26-000076 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 160,097.504

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

F2 · balance_after: Balance includes shares acquired through dividend reinvestments.

SEC source: 0001031296-26-000074 · form4.xml · derivative · entry 2

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,814.8266

Underlying: Common Stock · 837 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock units payable in cash or shares of Company common stock following conclusion of service as a director, in accordance with the terms and conditions of the Company Deferred Compensation Plan for Outside Directors. Each phantom stock unit is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000072 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,290.4465

Underlying: Common Stock · 837 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000070 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,290.4465

Underlying: Common Stock · 837 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000068 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,555.3933

Underlying: Common Stock · 837 shares

Expires not disclosed

F1 · security: Represents shares paid quarterly for director compensation under the FirstEnergy Corp. 2020 Incentive Compensation Plan and deferred pursuant to the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors.

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000066 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,970.2234

Underlying: Common Stock · 837 shares

Expires not disclosed

F2 · derivative.exercise_price: 1 for 1

F3 · derivative.exercise_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F3 · derivative.expiration_date: This holding reflects phantom stock payable in cash or shares of FirstEnergy Corp. common stock following conclusion of service as a director, in accordance with the terms and conditions of the FirstEnergy Corp. Deferred Compensation Plan for Outside Directors. Each share of phantom stock is the economic equivalent of one share of common stock.

F4 · balance_after: Includes dividends accrued on phantom stock units.

SEC source: 0001031296-26-000064 · form4.xml · nonDerivative · entry 1

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,869

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.60 to $50.621, inclusive. The reporting person undertakes to provide to FirstEnergy Corp. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001031296-26-000062 · form4.xml · nonDerivative · entry 1

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 119,552.374

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.925 to $50.955, inclusive. The reporting person undertakes to provide to FirstEnergy Corp. (the "Company"), any security holder of the Company., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001031296-26-000060 · form4.xml · nonDerivative · entry 2

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Indirect · By Savings Plan

Disclosed balance after: 0

F1 · shares: FirstEnergy Corp.'s (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 sold includes those shares held in the unitized stock fund and acquired under the 401(k) Plan since the reporting person's last filed Form 4.

SEC source: 0001031296-26-000060 · form4.xml · nonDerivative · entry 1

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,176.309

SEC source: 0001031296-26-000053 · form4.xml · nonDerivative · entry 2

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,797.48

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: Represents the vesting of performance-adjusted 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.

F3 · price: The RSUs converted into shares of the Company's common stock on a one-for-one basis under the Company 2020 Incentive Compensation Plan.

SEC source: 0001031296-26-000058 · form4.xml · derivative · entry 8

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,658

Underlying: Common Stock · 13,658 shares

Expires not disclosed

F9 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of the Company's common stock.

F10 · derivative.exercise_date: The phantom stock becomes payable upon the reporting person's death, disability or termination of employment with the Company.

F10 · derivative.expiration_date: The phantom stock becomes payable upon the reporting person's death, disability or termination of employment with the Company.

SEC source: 0001031296-26-000058 · form4.xml · derivative · entry 7

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 24,155.778 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_price: RSUs convert into the Company's common stock on a one-for-one basis.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001031296-26-000058 · form4.xml · nonDerivative · entry 5

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,452.865

F6 · shares: 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.

SEC source: 0001031296-26-000058 · form4.xml · nonDerivative · entry 4

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,110.865

F5 · shares: 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.

SEC source: 0001031296-26-000058 · form4.xml · nonDerivative · entry 3

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,199.643

F4 · shares: 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.

SEC source: 0001031296-26-000058 · form4.xml · nonDerivative · entry 2

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,739.643

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: 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.

F3 · price: The RSUs converted into shares of the Company's common stock on a one-for-one basis under the Company 2020 Incentive Compensation Plan.

SEC source: 0001031296-26-000058 · form4.xml · nonDerivative · entry 1

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,583.865

F1 · shares: 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.

SEC source: 0001031296-26-000057 · form4.xml · derivative · entry 6

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 229,580.554 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_price: RSUs convert into the Company's common stock on a one-for-one basis.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001031296-26-000057 · form4.xml · nonDerivative · entry 4

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 538,135.084

F5 · shares: 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.

SEC source: 0001031296-26-000057 · form4.xml · nonDerivative · entry 3

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 614,437.638

F4 · shares: 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.

SEC source: 0001031296-26-000057 · form4.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 682,799.638

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: 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.

F3 · price: The RSUs converted into shares of the Company's common stock on a one-for-one basis under the Company 2020 Incentive Compensation Plan.

SEC source: 0001031296-26-000057 · form4.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Director · Chairman, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 453,219.084

F1 · shares: 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.

SEC source: 0001031296-26-000056 · form4.xml · derivative · entry 9

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,344

Underlying: Common Stock · 22,344 shares

Expires not disclosed

F10 · derivative.exercise_price: Each share of phantom stock represents a right to receive one share of the Company's common stock.

F11 · derivative.exercise_date: The phantom stock becomes payable upon the reporting person's death, disability or termination of employment with the Company.

F11 · derivative.expiration_date: The phantom stock becomes payable upon the reporting person's death, disability or termination of employment with the Company.

SEC source: 0001031296-26-000056 · form4.xml · derivative · entry 8

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 66,927.69 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · derivative.exercise_price: RSUs convert into the Company's common stock on a one-for-one basis.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 6

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,352.374

F7 · shares: In connection with the vesting of the Share-Based RSUs on March 1, 2026, the reporting person's receipt of 22,344 shares of the Company's common stock was deferred, resulting in the reporting person receiving instead 22,344 shares of phantom stock pursuant to the Company's deferred compensation plan. The reporting person is therefore reporting the disposition of 22,344 shares of common stock in exchange for an equal number of shares of phantom stock.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 5

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,696.374

F6 · shares: 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.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 4

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 190,937.064

F5 · shares: Represents the number of shares withheld to satisfy the reporting person's tax withholding obligation upon the vesting of 14,522 shares of restricted common stock granted pursuant to the terms of the Restricted Stock Award Agreement, dated March 1, 2023, between the Company and the reporting person.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 3

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 196,648.064

F4 · shares: Represents shares of common stock of the Company 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.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 2

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 208,128.064

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · shares: 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.

F3 · price: The RSUs converted into shares of the Company's common stock on a one-for-one basis under the FirstEnergy Corp. 2020 Incentive Compensation Plan.

SEC source: 0001031296-26-000056 · form4.xml · nonDerivative · entry 1

K. Jon Taylor · CIK 0001575883 · SVP, CFO and Strategy

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,200.374

F1 · shares: 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.

SEC source: 0001031296-26-000055 · form4.xml · derivative · entry 6

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 34,213.477 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_price: RSUs convert into the Company's common stock on a one-for-one basis.

F2 · derivative.exercise_date: 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.

F2 · derivative.expiration_date: 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.

SEC source: 0001031296-26-000055 · form4.xml · nonDerivative · entry 4

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,644.129

F5 · shares: 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.