TIERNEY BRIAN X

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: 0001031296-26-000057 · 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: 0001031296-26-000036 · 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: 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: 0001127602-25-016650 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 384,408.891

F1 · shares: These securities are restricted stock units ("RSUs"), each representing a contingent right to receive one share of common stock, par value $0.10 per share, of FirstEnergy Corp. (the "Company"). The RSUs were granted under the Company's 2020 Incentive Compensation Plan and will vest in full on March 1, 2028. This transaction is being reported late due to an inadvertent administrative error and not any error of the Reporting Person.

F2 · balance_after: Balance includes dividends accrued on time-based equity awards.

SEC source: 0001127602-25-008127 · form4.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 133,587 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.

F5 · derivative.exercise_price: Share-Based RSUs convert into the Company's common stock on a one-for-one basis.

F1 · 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 in shares of common stock of FirstEnergy Corp. (the "Company") ("Share-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 5, 2025, as previously reported on a Form 4 filed on February 7, 2025, and the RSUs, which had remained subject to a continued service requirement, vested on March 1, 2025.

F1 · 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 in shares of common stock of FirstEnergy Corp. (the "Company") ("Share-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 5, 2025, as previously reported on a Form 4 filed on February 7, 2025, and the RSUs, which had remained subject to a continued service requirement, vested on March 1, 2025.

SEC source: 0001127602-25-008127 · 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: 277,807.602

F3 · shares: Represents shares of common stock of the Company automatically withheld to cover tax obligations associated with the vesting of the RSUs described in footnote 1, which transaction is exempt under Rule 16b-3.

SEC source: 0001127602-25-008127 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 338,389.602

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.

F1 · 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 in shares of common stock of FirstEnergy Corp. (the "Company") ("Share-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 5, 2025, as previously reported on a Form 4 filed on February 7, 2025, and the RSUs, which had remained subject to a continued service requirement, vested on March 1, 2025.

F2 · 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: 0001127602-25-003674 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 132,122.454

Underlying: Common Stock · 132,122.454 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 5, 2025. Subsequent to this certification, these RSUs will vest on March 1, 2025, generally subject to the reporting person's continued service.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 5, 2025. Subsequent to this certification, these RSUs will vest on March 1, 2025, generally subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 5, 2025. Subsequent to this certification, these RSUs will vest on March 1, 2025, generally subject to the reporting person's continued service.

SEC source: 0001127602-24-017934 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 198,280

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 35,190 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: Includes 1,502 shares acquired through dividend reinvestment.

SEC source: 0001127602-24-008731 · form4.xml · derivative · entry 4

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 142,698 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.

F1 · derivative.exercise_price: This Form 4 is being filed to report the vesting, and automatic withholding for tax purposes, of performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in shares of common stock of FirstEnergy Corp. (the "Company") following the vesting date. The satisfaction of the performance goals for the RSUs were certified by the Company's Board of Directors on February 7, 2024, as previously reported on a Form 4 filed on February 9, 2024, and the RSUs vested on March 1, 2024.

F1 · derivative.exercise_date: This Form 4 is being filed to report the vesting, and automatic withholding for tax purposes, of performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in shares of common stock of FirstEnergy Corp. (the "Company") following the vesting date. The satisfaction of the performance goals for the RSUs were certified by the Company's Board of Directors on February 7, 2024, as previously reported on a Form 4 filed on February 9, 2024, and the RSUs vested on March 1, 2024.

F1 · derivative.expiration_date: This Form 4 is being filed to report the vesting, and automatic withholding for tax purposes, of performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in shares of common stock of FirstEnergy Corp. (the "Company") following the vesting date. The satisfaction of the performance goals for the RSUs were certified by the Company's Board of Directors on February 7, 2024, as previously reported on a Form 4 filed on February 9, 2024, and the RSUs vested on March 1, 2024.

SEC source: 0001127602-24-008731 · form4.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 212,737

F3 · shares: Represents shares of common stock of the Company automatically withheld to cover tax obligations associated with the vesting of the RSUs described in footnote 1, which transaction is exempt under Rule 16b-3.

SEC source: 0001127602-24-008731 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 277,451

F1 · shares: This Form 4 is being filed to report the vesting, and automatic withholding for tax purposes, of performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in shares of common stock of FirstEnergy Corp. (the "Company") following the vesting date. The satisfaction of the performance goals for the RSUs were certified by the Company's Board of Directors on February 7, 2024, as previously reported on a Form 4 filed on February 9, 2024, and the RSUs vested on March 1, 2024.

F2 · price: The RSUs were granted under the FirstEnergy Corp. 2020 Incentive Compensation Plan and, therefore, the reporting person paid no price for the RSUs.

SEC source: 0001127602-24-004298 · form4.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,104.338

Underlying: Common Stock · 141,104.338 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 7, 2024. As a result, these RSUs will vest on March 1, 2024, generally subject to the reporting person's continued service.

F3 · derivative.exercise_date: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 7, 2024. As a result, these RSUs will vest on March 1, 2024, generally subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents performance-adjusted restricted stock units ("RSUs"), each of which represents a contingent right to receive an award payable in Company common stock 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 7, 2024. As a result, these RSUs will vest on March 1, 2024, generally subject to the reporting person's continued service.

SEC source: 0001127602-23-017897 · form4a.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,753

F1 · shares: Restricted stock was granted pursuant to an award agreement effective on June 1, 2023.

F2 · balance_after: The original Form 4, filed on June 5, 2023, is being amended by this Form 4 amendment to correct the reporting person's address. All other information in the original Form 4 was correct and remains unchanged following this amendment. This Form 4 amendment re-reports the transaction reported in the original Form 4, filed on June 5, 2023; no additional shares were acquired by the reporting person.

SEC source: 0001127602-23-017741 · form4.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 134,753

F1 · shares: Restricted stock was granted pursuant to an award agreement effective on June 1, 2023.

SEC source: 0001398889-21-000142 · edgar.xml · nonDerivative · entry 4

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,693

F4 · shares: A portion of Mr. Tierney's restricted stock units (962) that were granted 2/15/2021 vested on 7/8/2021. Upon vesting, 437 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000142 · edgar.xml · nonDerivative · entry 3

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,130

F3 · shares: A portion of Mr. Tierney's restricted stock units (602) that were granted on 2/17/2020 vested on 7/8/2021 Upon vesting, 274 restricted stock units were withheld to satisfy the reporting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000142 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,404

F2 · shares: A portion of Mr. Tierney's restricted stock units (533) that were granted 2/18/2019 vested on 7/8/2021 Upon vesting, 243 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000142 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,647

F1 · shares: A portion of Mr. Tierney's restricted stock units (2,142) that were granted 2/18/2019 vested on 7/8/2021 Upon vesting, 972 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000140 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,595

F1 · shares: Effective 7/01/2021 Mr. Tierney was granted 7,506 restricted stock units which vested on 7/1/2021. Upon vesting, 3,405 restricted stock units were withheld to satisfy his tax liability.

F2 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000140 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,358

F1 · shares: Effective 7/01/2021 Mr. Tierney was granted 7,506 restricted stock units which vested on 7/1/2021. Upon vesting, 3,405 restricted stock units were withheld to satisfy his tax liability.

SEC source: 0001398889-21-000106 · edgar.xml · nonDerivative · entry 4

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,301

F4 · shares: A portion of Mr. Tierney's restricted stock units (1,664) that were granted on 2/17/2020 vested on 5/1/2021 Upon vesting, 755 restricted stock units were withheld to satisfy the reporting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000106 · edgar.xml · nonDerivative · entry 3

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,056

F3 · shares: A portion of Mr. Tierney's restricted stock units (10,094) that were granted 2/18/2019 vested on 5/1/2021 Upon vesting, 4578 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000106 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,634

F2 · shares: A portion of Mr. Tierney's restricted stock units (2,242) that were granted 2/18/2019 vested on 5/1/2021 Upon vesting, 1018 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000106 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,652

F1 · shares: A portion of Mr. Tierney's restricted stock units (2,735) that were granted 2/19/2018 vested on 5/1/2021. Upon vesting, 1241 restricted stock units were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-21-000044 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,447

SEC source: 0001398889-21-000044 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,643

SEC source: 0001398889-21-000030 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,351.229

F1 · security: Each restricted stock unit represents a contingent right to receive AEP common stock upon vesting. The restricted stock units vest in three equal installments on May 1, 2022, May 1, 2023 and May 1, 2024.

SEC source: 0001398889-20-000096 · edgar.xml · nonDerivative · entry 4

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,166

F4 · shares: A portion of Mr. Tierney's restricted stock units (2,166) that were granted 2/18/2019 vested on 5/1/2020 Upon vesting, 983 restricted stock unitw were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-20-000096 · edgar.xml · nonDerivative · entry 3

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,149

F3 · shares: A portion of Mr. Tierney's restricted stock units (2,642) that were granted 2/19/2018 vested on 5/1/2020. Upon vesting, 1,199 restricted stock unitw were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-20-000096 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,348

F2 · shares: A portion of Mr. Tierney's restricted stock units (2,866) that were granted on 2/20/2017 vested on 5/1/2020 Upon vesting, 1,300 restricted stock units were withheld to satisfy the reporting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-20-000096 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,648

F1 · shares: A portion of Mr. Tierney's restricted stock units (6,498) that were granted 2/18/2019 vested on 5/1/2020 Upon vesting, 2,948 restricted stock unitw were withheld to satisfy the porting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-20-000065 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,162

F1 · price: This transaction was executed in multiple trades at prices ranging from $101.51 to $101.63. The price reported above reflects the weighted average sale. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001398889-20-000055 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,735

SEC source: 0001398889-20-000055 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 79,151

SEC source: 0001398889-20-000044 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,162

F1 · security: Each restricted stock unit represents a contingent right to receive AEP common stock upon vesting. The restricted stock units vest in three equal installments on May 1, 2021, May 1, 2022 and May 1, 2023.

SEC source: 0001398889-19-000125 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Indirect · by 401(k) Plan

Disclosed balance after: 6,188

SEC source: 0001398889-19-000088 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,448.63

SEC source: 0001398889-19-000083 · edgar.xml · derivative · entry 7

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,816 shares

Expires 2019-05-01

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.

F1 · derivative.exercise_price: A portion of Mr. Tierney's restricted stock units (2,816) that were granted 2/23/2016 vested on 5/1/2019. Upon vesting, 1,277 restricted stock unitw were withheld to satisfy the porting person's tax liability and the remaining restricted stock units were settled in cash.

F4 · price: Value is based on 20 day average stock closing price.

SEC source: 0001398889-19-000083 · edgar.xml · nonDerivative · entry 5

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,840

F3 · shares: A portion of Mr. Tierney's restricted stock units (2,566) that were granted 2/19/2018 vested on 5/1/2019. Upon vesting, 1,164 restricted stock unitw were withheld to satisfy the porting person's tax liability and the remaining restricted stock units were settled in cash.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-19-000083 · edgar.xml · nonDerivative · entry 4

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,004

F2 · shares: A portion of Mr. Tierney's restricted stock units (2,782) that were granted on 2/20/2017 vested on 5/1/2019 Upon vesting, 1,262 restricted stock units were withheld to satisfy the reporting person's tax liability.

F5 · price: Value is based on the closing price of the stock.

SEC source: 0001398889-19-000083 · edgar.xml · nonDerivative · entry 3

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,266

F4 · price: Value is based on 20 day average stock closing price.

SEC source: 0001398889-19-000083 · edgar.xml · nonDerivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,805

F4 · price: Value is based on 20 day average stock closing price.

SEC source: 0001398889-19-000083 · edgar.xml · nonDerivative · entry 1

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,082

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.

F1 · shares: A portion of Mr. Tierney's restricted stock units (2,816) that were granted 2/23/2016 vested on 5/1/2019. Upon vesting, 1,277 restricted stock unitw were withheld to satisfy the porting person's tax liability and the remaining restricted stock units were settled in cash.

F4 · price: Value is based on 20 day average stock closing price.

SEC source: 0001398889-19-000040 · edgar.xml · derivative · entry 2

TIERNEY BRIAN X · CIK 0001423515 · Executive VP, CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,230

Underlying: Common Stock · 25,230 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive AEP common stock upon vesting.

F3 · derivative.exercise_date: The restricted stock units vest in three installments of 25% on May 1, 2020, 37.5% on May 1, 2021 and 37.5% on May 1, 2022

F3 · derivative.expiration_date: The restricted stock units vest in three installments of 25% on May 1, 2020, 37.5% on May 1, 2021 and 37.5% on May 1, 2022