TLN

SEC source: 0001628280-26-038578 · wk-form4_1779921263.xml · nonDerivative · entry 3

McFarland Mark Allen · CIK 0001720720 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 260,452

F3 · kind: In an exempt disposition to the Company under Rule 16b-3(e), the reporting person remitted shares to the Company in connection with the satisfaction of tax withholding obligations arising out of the vesting of the RSUs and PSUs.

SEC source: 0001628280-26-038578 · wk-form4_1779921263.xml · nonDerivative · entry 2

McFarland Mark Allen · CIK 0001720720 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,093

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 · price: Each performance-based restricted stock unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus an additional incentive based on the Company's market capitalization at vesting, as more fully set forth in the applicable award agreement. The number of shares in this row represents the actual level of performance (200%) plus the additional incentive shares described above. The reporting person's PSUs were granted on June 16, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

SEC source: 0001628280-26-038578 · wk-form4_1779921263.xml · nonDerivative · entry 1

McFarland Mark Allen · CIK 0001720720 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,980

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such RSUs settled in cash.

SEC source: 0001628280-26-038572 · wk-form4_1779921145.xml · derivative · entry 5

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,564 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.

F2 · derivative.exercise_price: Each performance-based restricted stock unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award. The number of shares in this row represents the actual level of performance (200%). The reporting person's PSUs were granted on August 1, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

F2 · derivative.exercise_date: Each performance-based restricted stock unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award. The number of shares in this row represents the actual level of performance (200%). The reporting person's PSUs were granted on August 1, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

F2 · derivative.expiration_date: Each performance-based restricted stock unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award. The number of shares in this row represents the actual level of performance (200%). The reporting person's PSUs were granted on August 1, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

SEC source: 0001628280-26-038572 · wk-form4_1779921145.xml · derivative · entry 4

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,376 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on August 1, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such RSUs settled in cash.

F1 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on August 1, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such RSUs settled in cash.

F1 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on August 1, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such RSUs settled in cash.

SEC source: 0001628280-26-038572 · wk-form4_1779921145.xml · nonDerivative · entry 3

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,205

F3 · kind: In an exempt disposition to the Company under Rule 16b-3(e), the reporting person remitted shares to the Company in connection with the satisfaction of tax withholding obligations arising out of the vesting of the RSUs and PSUs.

SEC source: 0001628280-26-038572 · wk-form4_1779921145.xml · nonDerivative · entry 2

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,979

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 · price: Each performance-based restricted stock unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award. The number of shares in this row represents the actual level of performance (200%). The reporting person's PSUs were granted on August 1, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

SEC source: 0001628280-26-038572 · wk-form4_1779921145.xml · nonDerivative · entry 1

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,153

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on August 1, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such RSUs settled in cash.

SEC source: 0001628280-26-038567 · wk-form4_1779921042.xml · derivative · entry 5

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 45,873 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.

F2 · derivative.exercise_price: Each performance-based restricted stock units ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus an additional incentive based on the Company's market capitalization at vesting, as more fully set forth in the applicable award agreement. The number of shares in this row represents the actual level of performance (200%) plus the additional incentive shares described above. The reporting person's PSUs were granted on June 16, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

F2 · derivative.exercise_date: Each performance-based restricted stock units ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus an additional incentive based on the Company's market capitalization at vesting, as more fully set forth in the applicable award agreement. The number of shares in this row represents the actual level of performance (200%) plus the additional incentive shares described above. The reporting person's PSUs were granted on June 16, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

F2 · derivative.expiration_date: Each performance-based restricted stock units ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus an additional incentive based on the Company's market capitalization at vesting, as more fully set forth in the applicable award agreement. The number of shares in this row represents the actual level of performance (200%) plus the additional incentive shares described above. The reporting person's PSUs were granted on June 16, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

SEC source: 0001628280-26-038567 · wk-form4_1779921042.xml · derivative · entry 4

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,133 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038567 · wk-form4_1779921042.xml · nonDerivative · entry 3

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,825

F3 · kind: Represents a portion of the PSUs that vested on May 17, 2026 (an additional 6,789 of which were cash settled in an amount approximately equivalent to taxes associated with the stock-settled portion of such vesting).

SEC source: 0001628280-26-038567 · wk-form4_1779921042.xml · nonDerivative · entry 2

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,614

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 · price: Each performance-based restricted stock units ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus an additional incentive based on the Company's market capitalization at vesting, as more fully set forth in the applicable award agreement. The number of shares in this row represents the actual level of performance (200%) plus the additional incentive shares described above. The reporting person's PSUs were granted on June 16, 2023 and they vested on May 17, 2026, the third anniversary of the vesting commencement date, with 60% of the after-tax value of such PSUs settled in cash.

SEC source: 0001628280-26-038567 · wk-form4_1779921042.xml · nonDerivative · entry 1

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,265

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038562 · wk-form4_1779920894.xml · derivative · entry 2

Schwartzstein Christine Benson · CIK 0001995618 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,133 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038562 · wk-form4_1779920894.xml · nonDerivative · entry 1

Schwartzstein Christine Benson · CIK 0001995618 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,736

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038565 · wk-form4_1779920986.xml · derivative · entry 2

Horton Anthony R · CIK 0001699604 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,133 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038565 · wk-form4_1779920986.xml · nonDerivative · entry 1

Horton Anthony R · CIK 0001699604 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,265

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038563 · wk-form4_1779920929.xml · derivative · entry 3

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,133 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.exercise_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

F1 · derivative.expiration_date: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-038563 · wk-form4_1779920929.xml · nonDerivative · entry 2

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,206

F2 · kind: Represents a portion of the RSUs that vested on May 17, 2026 (1,530 of which were cash settled in an amount approximately equivalent to taxes associated with such vesting).

SEC source: 0001628280-26-038563 · wk-form4_1779920929.xml · nonDerivative · entry 1

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,736

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock") of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan. The reporting person's RSUs were granted on June 16, 2023 and the final installment of the reporting person's RSUs vested on May 17, 2026, the third anniversary of the vesting commencement date.

SEC source: 0001628280-26-013410 · wk-form4_1772491672.xml · derivative · entry 1

Hyde Karen T · CIK 0002029043 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448

Underlying: Common Stock · 448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-26-013406 · wk-form4_1772491639.xml · derivative · entry 2

Berryman Brad · CIK 0002028822 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,096

Underlying: Common Stock · 16,096 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F4 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F4 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013406 · wk-form4_1772491639.xml · derivative · entry 1

Berryman Brad · CIK 0002028822 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,450

Underlying: Common Stock · 3,450 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F2 · derivative.expiration_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013411 · wk-form4_1772491680.xml · derivative · entry 3

Lebsack Dale E Jr. · CIK 0002028467 · Chief Asset Dev. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,096

Underlying: Common Stock · 16,096 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F5 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F5 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013411 · wk-form4_1772491680.xml · derivative · entry 2

Lebsack Dale E Jr. · CIK 0002028467 · Chief Asset Dev. Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,450

Underlying: Common Stock · 3,450 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock of the Company or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013412 · wk-form4_1772491686.xml · derivative · entry 3

Wright Andrew M · CIK 0002028524 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,096

Underlying: Common Stock · 16,096 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F5 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F5 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013412 · wk-form4_1772491686.xml · derivative · entry 2

Wright Andrew M · CIK 0002028524 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,450

Underlying: Common Stock · 3,450 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock of the Company or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013409 · wk-form4_1772491664.xml · derivative · entry 2

Plagens Anthony J · CIK 0002028528 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,400

Underlying: Common Stock · 4,400 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F4 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 1,760 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 2,640 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F4 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 1,760 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 2,640 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013409 · wk-form4_1772491664.xml · derivative · entry 1

Plagens Anthony J · CIK 0002028528 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,467

Underlying: Common Stock · 1,467 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents 586 RSUs that will vest on February 25, 2027, 587 RSUs that will vest on February 25, 2028 and 294 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F2 · derivative.expiration_date: Represents 586 RSUs that will vest on February 25, 2027, 587 RSUs that will vest on February 25, 2028 and 294 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013415 · wk-form4_1772491704.xml · derivative · entry 2

Morice Christopher E · CIK 0002028530 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,096

Underlying: Common Stock · 16,096 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F4 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F4 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013415 · wk-form4_1772491704.xml · derivative · entry 1

Morice Christopher E · CIK 0002028530 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,450

Underlying: Common Stock · 3,450 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F2 · derivative.expiration_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013417 · wk-form4_1772491715.xml · derivative · entry 2

Muller Cole · CIK 0002028529 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,934

Underlying: Common Stock · 25,934 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F4 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 10,374 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 15,560 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F4 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 10,374 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 15,560 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013417 · wk-form4_1772491715.xml · derivative · entry 1

Muller Cole · CIK 0002028529 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,557

Underlying: Common Stock · 5,557 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents 2,222 RSUs that will vest on February 25, 2027, 2,223 RSUs that will vest on February 25, 2028 and 1,112 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F2 · derivative.expiration_date: Represents 2,222 RSUs that will vest on February 25, 2027, 2,223 RSUs that will vest on February 25, 2028 and 1,112 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013401 · wk-form4_1772491606.xml · derivative · entry 3

Nutt Terry L · CIK 0001707031 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,086

Underlying: Common Stock · 33,086 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F5 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 13,234 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 19,852 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F5 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 13,234 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 19,852 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013401 · wk-form4_1772491606.xml · derivative · entry 2

Nutt Terry L · CIK 0001707031 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,090

Underlying: Common Stock · 7,090 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock of the Company or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 2,836 RSUs that will vest on February 25, 2027, 2,836 RSUs that will vest on February 25, 2028 and 1,418 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents 2,836 RSUs that will vest on February 25, 2027, 2,836 RSUs that will vest on February 25, 2028 and 1,418 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013416 · wk-form4_1772491709.xml · derivative · entry 3

Olagues Darren J · CIK 0001408305 · Chief Development Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,096

Underlying: Common Stock · 16,096 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F5 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F5 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 9,658 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013416 · wk-form4_1772491709.xml · derivative · entry 2

Olagues Darren J · CIK 0001408305 · Chief Development Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,450

Underlying: Common Stock · 3,450 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock of the Company or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents 1,380 RSUs that will vest on February 25, 2027, 1,380 RSUs that will vest on February 25, 2028 and 690 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013405 · wk-form4_1772491631.xml · derivative · entry 1

ABBAS GIZMAN I · CIK 0001543090 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448

Underlying: Common Stock · 448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-26-013414 · wk-form4_1772491698.xml · derivative · entry 1

SCHAEFER STEPHEN · CIK 0001955735 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,118

Underlying: Common Stock · 1,118 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-26-013413 · wk-form4_1772491692.xml · derivative · entry 3

McFarland Mark Allen · CIK 0001720720 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 58,420

Underlying: Common Stock · 58,420 shares

Expires not disclosed

F4 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F5 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 23,368 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 35,052 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F5 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 23,368 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 35,052 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013413 · wk-form4_1772491692.xml · derivative · entry 2

McFarland Mark Allen · CIK 0001720720 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,519

Underlying: Common Stock · 12,519 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock of the Company or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 5,007 RSUs that will vest on February 25, 2027, 5,008 RSUs that will vest on February 25, 2028 and 2,504 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F3 · derivative.expiration_date: Represents 5,007 RSUs that will vest on February 25, 2027, 5,008 RSUs that will vest on February 25, 2028 and 2,504 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013408 · wk-form4_1772491656.xml · derivative · entry 2

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,730

Underlying: Common Stock · 10,730 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Performance-Based Restricted Stock Unit ("PSU") was issued under the Plan and represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Committee pursuant to the terms of the Plan.

F4 · derivative.exercise_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 4,292 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

F4 · derivative.expiration_date: Represents PSUs that will vest subject to the reporting person's (i) continued service and (ii) achievement of applicable performance goals. 4,292 of the PSUs will be eligible to vest based on performance as of February 25, 2028 and 6,438 of the PSUs will be eligible to vest based on performance as of February 25, 2029. The number of PSUs that vest can range from 0% to 200% of the target number of PSUs subject to the award, plus, if the maximum performance level is exceeded, an additional number of PSUs in an amount equal to the reporting person's proportionate share among the participating executive officers of 3% of the Company's market capitalization above the maximum performance level. The numbers of PSUs and shares of common stock in this row represent the maximum level of performance (or 200%) for each award.

SEC source: 0001628280-26-013408 · wk-form4_1772491656.xml · derivative · entry 1

Casulli Edward T. · CIK 0002102527 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,577

Underlying: Common Stock · 3,577 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors (the "Committee") pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents 1,430 RSUs that will vest on February 25, 2027, 1,431 RSUs that will vest on February 25, 2028 and 716 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

F2 · derivative.expiration_date: Represents 1,430 RSUs that will vest on February 25, 2027, 1,431 RSUs that will vest on February 25, 2028 and 716 RSUs that will vest on February 25, 2029, in each case subject to the reporting person's continued service.

SEC source: 0001628280-26-013407 · wk-form4_1772491648.xml · derivative · entry 1

Schwartzstein Christine Benson · CIK 0001995618 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448

Underlying: Common Stock · 448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-26-013403 · wk-form4_1772491622.xml · derivative · entry 1

Horton Anthony R · CIK 0001699604 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448

Underlying: Common Stock · 448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-26-013402 · wk-form4_1772491614.xml · derivative · entry 1

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 448

Underlying: Common Stock · 448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001, of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F2 · derivative.exercise_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

F2 · derivative.expiration_date: Represents RSUs that, subject to the reporting person's continued service, will vest on February 25, 2027.

SEC source: 0001628280-25-035436 · wk-form4_1753128161.xml · derivative · entry 3

Nutt Terry L · CIK 0001707031 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,780

Underlying: Common Stock · 20,779 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: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

F3 · derivative.exercise_date: Represents 20,779 RSUs that vested on July 10, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on July 10, 2026.

F3 · derivative.expiration_date: Represents 20,779 RSUs that vested on July 10, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on July 10, 2026.

SEC source: 0001628280-25-035436 · wk-form4_1753128161.xml · nonDerivative · entry 2

Nutt Terry L · CIK 0001707031 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,602

F2 · kind: In an exempt disposition to the Company under Rule 16b-3(e), the reporting person remitted shares to the Company in connection with the satisfaction of tax withholding obligations arising out of the vesting of the RSUs.

SEC source: 0001628280-25-035436 · wk-form4_1753128161.xml · nonDerivative · entry 1

Nutt Terry L · CIK 0001707031 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,779

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 · price: Each Restricted Stock Unit ("RSU") was issued under the Talen Energy Corporation 2023 Equity Incentive Plan (the "Plan") and represents a contingent right to receive one share of common stock, par value $0.001 ("common stock"), of Talen Energy Corporation (the "Company") or its cash equivalent, as determined at the time of settlement by the Compensation Committee of the Company's Board of Directors pursuant to the terms of the Plan.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 22

Rubric Capital Management LP · CIK 0001687509 · 10% owner

Rosen David Efraim · CIK 0001898677 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 4,453,131

F21 · kind: This transaction represents a pro-rata in-kind distribution to limited partners for no consideration (the "Pro-Rata Distribution").

F21 · price: This transaction represents a pro-rata in-kind distribution to limited partners for no consideration (the "Pro-Rata Distribution").

F1 · ownership.nature: This Form 4 is filed by Rubric Capital Management LP ("Rubric Capital") and Mr. David Rosen, with respect to the securities held by certain funds and/or accounts (collectively, the "Rubric Vehicles"). Rubric Capital serves as the investment adviser to the Rubric Vehicles. Mr. David Rosen serves as the Managing Member of Rubric Capital Management GP, LLC, the general partner of Rubric Capital.

F2 · ownership.nature: The filing of this statement shall not be deemed an admission that any Reporting Person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Act of 1934, as amended, or otherwise. Each Reporting Person expressly disclaims beneficial ownership of the securities reported herein except to the extent of its or his pecuniary interest therein.