FE

SEC source: 0001031296-26-000055 · form4.xml · nonDerivative · entry 3

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,002.606

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: 0001031296-26-000055 · form4.xml · nonDerivative · entry 2

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,196.606

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: 0001031296-26-000055 · form4.xml · nonDerivative · entry 1

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,983.129

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: 0001031296-26-000054 · form4.xml · derivative · entry 7

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 38,656.121 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 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 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: 0001031296-26-000054 · form4.xml · nonDerivative · entry 4

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,626.657

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: 0001031296-26-000054 · form4.xml · nonDerivative · entry 3

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 125,511.778

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: 0001031296-26-000054 · form4.xml · nonDerivative · entry 2

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 137,005.778

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: 0001031296-26-000054 · form4.xml · nonDerivative · entry 1

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,349.657

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: 0001031296-26-000053 · form4.xml · derivative · entry 6

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,402.171 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 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 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: 0001031296-26-000053 · form4.xml · nonDerivative · entry 4

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,176.309

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: 0001031296-26-000053 · form4.xml · nonDerivative · entry 3

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,614.48

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: 0001031296-26-000053 · form4.xml · nonDerivative · entry 1

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,395.309

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: 0001031296-26-000036 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 227,592.972

Underlying: Common Stock · 227,592.972 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs") granted on June 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.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs") granted on June 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.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs") granted on June 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.

SEC source: 0001031296-26-000035 · form4.xml · derivative · entry 3

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,945.741

Underlying: Common Stock · 23,945.741 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs") granted on November 30, 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.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs") granted on November 30, 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.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs") granted on November 30, 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.

SEC source: 0001031296-26-000034 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,347.313

Underlying: Common Stock · 66,347.313 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

SEC source: 0001031296-26-000033 · form4.xml · derivative · entry 3

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,916.712

Underlying: Common Stock · 33,916.712 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs") granted on December 18, 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.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs") granted on December 18, 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.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs") granted on December 18, 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.

SEC source: 0001031296-26-000032 · form4.xml · derivative · entry 4

Park Hyun · CIK 0001322841 · SVP & CLO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,321.003

Underlying: Common Stock · 38,321.003 shares

Expires not disclosed

F3 · derivative.exercise_price: 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.

F3 · derivative.exercise_date: 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.

F3 · derivative.expiration_date: 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.

SEC source: 0001031296-26-000031 · form4.xml · derivative · entry 3

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,337.544

Underlying: Common Stock · 7,337.544 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs") granted 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.

SEC source: 0001031296-26-000017 · form4.xml · derivative · entry 2

Williams Melvin D. · CIK 0001864882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,298.7451

Underlying: Common Stock · 944 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: 0001031296-26-000016 · form4.xml · nonDerivative · entry 1

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,477

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

SEC source: 0001031296-26-000015 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 159,072.69

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: 0001031296-26-000013 · form4.xml · nonDerivative · entry 1

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,814

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

SEC source: 0001031296-26-000012 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,298.7451

Underlying: Common Stock · 944 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: 0001031296-26-000011 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,449.8748

Underlying: Common Stock · 944 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: 0001031296-26-000010 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,078.8231

Underlying: Common Stock · 944 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: 0001031296-26-000009 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,011.9003

Underlying: Common Stock · 944 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: 0001031296-25-000099 · form4.xml · nonDerivative · entry 1

Smith Allan Wade · CIK 0002004630 · President, FE Utilities

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 105,196.562

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 33,861 shares of restricted common stock granted pursuant to the terms of the Restricted Stock Award Agreement, dated December 18, 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: 0001031296-25-000091 · form4.xml · nonDerivative · entry 1

Thomas Toby L. · CIK 0002002091 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,630.28

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 2,918 shares of restricted common stock granted pursuant to the terms of the Restricted Stock Award Agreement, dated November 30, 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: 0001031296-25-000074 · form4.xml · derivative · entry 2

Williams Melvin D. · CIK 0001864882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,203.6424

Underlying: Common Stock · 925 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: 0001031296-25-000073 · form4.xml · nonDerivative · entry 1

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,533

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

SEC source: 0001031296-25-000072 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,128.69

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: 0001031296-25-000071 · form4.xml · nonDerivative · entry 1

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,870

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

F2 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001031296-25-000070 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,203.6424

Underlying: Common Stock · 925 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: 0001031296-25-000069 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,203.6694

Underlying: Common Stock · 925 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: 0001031296-25-000068 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,880.5667

Underlying: Common Stock · 925 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: 0001031296-25-000067 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,956.3581

Underlying: Common Stock · 925 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: 0001127602-25-018915 · form4.xml · derivative · entry 2

Williams Melvin D. · CIK 0001864882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,124.3477

Underlying: Common Stock · 1,055 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: 0001127602-25-018914 · form4.xml · nonDerivative · entry 1

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,608

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

SEC source: 0001127602-25-018903 · form4.xml · derivative · entry 2

KALETA PAUL J · CIK 0001349867 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,124.3477

Underlying: Common Stock · 1,055 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: 0001127602-25-018912 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,113.751

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: 0001127602-25-018909 · form4.xml · nonDerivative · entry 1

ONEIL JAMES F · CIK 0001102786 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,811.708

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

F2 · balance_after: Includes shares acquired through dividend reinvestments.

SEC source: 0001127602-25-018898 · form4.xml · derivative · entry 3

Hicks Lisa Winston · CIK 0001870881 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,124.3747

Underlying: Common Stock · 1,055 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: 0001127602-25-018895 · form4.xml · derivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,689.5621

Underlying: Common Stock · 1,055 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: 0001127602-25-018894 · form4.xml · derivative · entry 2

Croom Jana T · CIK 0001840657 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,919.9053

Underlying: Common Stock · 1,055 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: 0001127602-25-016650 · form4.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Director · Board Chair, President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 367,783.891

F3 · 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 36,630 shares of restricted common stock granted pursuant to the terms of the Restricted Stock Award Agreement, dated June 1, 2023, between the Company and the reporting person.

SEC source: 0001127602-25-015743 · form4.xml · nonDerivative · entry 1

Lisowski Jason · CIK 0001732499 · VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 183.097

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.97 to $41.98, inclusive. The reporting person undertakes to provide to FirstEnergy Corp., any security holder of FirstEnergy Corp., 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.

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

SEC source: 0001127602-25-013876 · 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: 99,919.008

F1 · balance_after: Balance includes shares acquired through dividend reinvestments.

SEC source: 0001127602-25-011533 · form4.xml · nonDerivative · entry 1

Turner Leslie M · CIK 0001553405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,553

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

SEC source: 0001127602-25-011537 · form4.xml · derivative · entry 2

Williams Melvin D. · CIK 0001864882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,921.6337

Underlying: Common Stock · 1,056 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 phantom stock units acquired through dividend reinvestments.

SEC source: 0001127602-25-011529 · form4.xml · nonDerivative · entry 1

SOMERHALDER JOHN W II · CIK 0001145921 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,976.788

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

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