TLN

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 21

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: 5,734,970

F20 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $298.08 to $298.205, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 20

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: 5,736,107

F19 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $297.05 to $298.05, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 19

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: 5,762,010

F18 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $296.03 to $297.03, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 18

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: 5,838,555

F17 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $295.025 to $296.02, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 17

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: 5,890,365

F16 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $294.02 to $295.02, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 16

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: 5,902,655

F15 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.01 to $294.00, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 15

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: 5,905,020

F14 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.00 to $292.985, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0001628280-25-033500 · wk-form4_1751314408.xml · derivative · entry 3

Wander John C · CIK 0002028525 · Gen. Counsel & Corp. Secretary

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 June 19, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on June 19, 2026.

F3 · derivative.expiration_date: Represents 20,779 RSUs that vested on June 19, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on June 19, 2026.

SEC source: 0001628280-25-033500 · wk-form4_1751314408.xml · nonDerivative · entry 2

Wander John C · CIK 0002028525 · Gen. Counsel & Corp. Secretary

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: 0001628280-25-033500 · wk-form4_1751314408.xml · nonDerivative · entry 1

Wander John C · CIK 0002028525 · Gen. Counsel & Corp. Secretary

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 14

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: 5,912,970

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 13

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: 5,913,070

F13 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.94 to $293.89, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 12

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: 5,945,994

F12 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.91 to $292.9, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 11

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: 5,979,115

F11 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.89 to $291.635, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 10

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: 5,994,939

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.825 to $290.785, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 9

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: 6,013,866

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288.82 to $289.72, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 8

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: 6,015,187

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 7

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: 6,015,287

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $295.12 to $295.37, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 6

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: 6,020,244

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $294.09 to $295.09, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 5

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: 6,034,217

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.08 to $294.08, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 4

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: 6,055,769

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292 to $292.93, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 3

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: 6,072,528

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 2

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: 6,072,728

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.01 to $289.86, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0000902664-25-002832 · ownership.xml · nonDerivative · entry 1

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: 6,079,157

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288 to $289, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein.

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.

SEC source: 0001628280-25-030214 · wk-form4_1749499978.xml · derivative · entry 3

Hyde Karen T · CIK 0002029043 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,133

Underlying: Common Stock · 4,132 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 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030214 · wk-form4_1749499978.xml · nonDerivative · entry 2

Hyde Karen T · CIK 0002029043 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,603

F2 · kind: Represents a portion of the RSUs that vested on May 17, 2025 (1,529 of which were cash settled in an amount approximately equivalent to taxes associated with such vesting).

SEC source: 0001628280-25-030214 · wk-form4_1749499978.xml · nonDerivative · entry 1

Hyde Karen T · CIK 0002029043 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,132

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: 0001628280-25-030229 · wk-form4_1749500300.xml · derivative · entry 3

Lebsack Dale E Jr. · CIK 0002028467 · Chief Fossil Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,946

Underlying: Common Stock · 17,946 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 17,946 RSUs that vested on May 17, 2025 and 17,946 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 17,946 RSUs that vested on May 17, 2025 and 17,946 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030229 · wk-form4_1749500300.xml · nonDerivative · entry 2

Lebsack Dale E Jr. · CIK 0002028467 · Chief Fossil Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,884

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: 0001628280-25-030229 · wk-form4_1749500300.xml · nonDerivative · entry 1

Lebsack Dale E Jr. · CIK 0002028467 · Chief Fossil Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,946

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: 0001628280-25-030228 · wk-form4_1749500286.xml · derivative · entry 3

Berryman Brad · CIK 0002028822 · SVP & Chief Nuclear Officer

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 May 17, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 20,779 RSUs that vested on May 17, 2025 and 20,780 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030228 · wk-form4_1749500286.xml · nonDerivative · entry 2

Berryman Brad · CIK 0002028822 · SVP & Chief Nuclear Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,638

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: 0001628280-25-030228 · wk-form4_1749500286.xml · nonDerivative · entry 1

Berryman Brad · CIK 0002028822 · SVP & Chief Nuclear Officer

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: 0001628280-25-030223 · wk-form4_1749500084.xml · derivative · entry 3

Wright Andrew M · CIK 0002028524 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,024

Underlying: Common Stock · 20,024 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 20,024 RSUs that vested on May 17, 2025 and 20,024 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 20,024 RSUs that vested on May 17, 2025 and 20,024 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030223 · wk-form4_1749500084.xml · nonDerivative · entry 2

Wright Andrew M · CIK 0002028524 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,144

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: 0001628280-25-030223 · wk-form4_1749500084.xml · nonDerivative · entry 1

Wright Andrew M · CIK 0002028524 · Chief Administrative Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,024

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: 0001628280-25-030216 · wk-form4_1749499992.xml · derivative · entry 3

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,668

Underlying: Common Stock · 5,667 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 5,667 RSUs that vested on May 17, 2025 and 5,668 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 5,667 RSUs that vested on May 17, 2025 and 5,668 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030216 · wk-form4_1749499992.xml · nonDerivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,437

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: 0001628280-25-030216 · wk-form4_1749499992.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,667

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: 0001628280-25-030218 · wk-form4_1749500010.xml · derivative · entry 3

Morice Christopher E · CIK 0002028530 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,050

Underlying: Common Stock · 14,050 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 14,050 RSUs that vested on May 17, 2025 and 14,050 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 14,050 RSUs that vested on May 17, 2025 and 14,050 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030218 · wk-form4_1749500010.xml · nonDerivative · entry 2

Morice Christopher E · CIK 0002028530 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,521

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: 0001628280-25-030218 · wk-form4_1749500010.xml · nonDerivative · entry 1

Morice Christopher E · CIK 0002028530 · Chief Commercial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,050

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: 0001628280-25-030230 · wk-form4_1749500312.xml · derivative · entry 3

Muller Cole · CIK 0002028529 · EVP, Strategic Ventures

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,176

Underlying: Common Stock · 13,176 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 13,176 RSUs that vested on May 17, 2025 and 13,176 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 13,176 RSUs that vested on May 17, 2025 and 13,176 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030230 · wk-form4_1749500312.xml · nonDerivative · entry 2

Muller Cole · CIK 0002028529 · EVP, Strategic Ventures

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,445

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: 0001628280-25-030230 · wk-form4_1749500312.xml · nonDerivative · entry 1

Muller Cole · CIK 0002028529 · EVP, Strategic Ventures

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,176

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: 0001628280-25-030219 · wk-form4_1749500026.xml · derivative · entry 3

ABBAS GIZMAN I · CIK 0001543090 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,133

Underlying: Common Stock · 4,132 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 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030219 · wk-form4_1749500026.xml · nonDerivative · entry 2

ABBAS GIZMAN I · CIK 0001543090 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,603

F2 · kind: Represents a portion of the RSUs that vested on May 17, 2025 (1,529 of which were cash settled in an amount approximately equivalent to taxes associated with such vesting).

SEC source: 0001628280-25-030219 · wk-form4_1749500026.xml · nonDerivative · entry 1

ABBAS GIZMAN I · CIK 0001543090 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,132

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: 0001628280-25-030227 · wk-form4_1749500110.xml · derivative · entry 3

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,133

Underlying: Common Stock · 4,132 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 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

F3 · derivative.expiration_date: Represents 4,132 RSUs that vested on May 17, 2025 and 4,133 RSUs that, subject to the reporting person's continued service, will vest on May 17, 2026.

SEC source: 0001628280-25-030227 · wk-form4_1749500110.xml · nonDerivative · entry 2

Nigro Joseph · CIK 0001740087 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,603

F2 · kind: Represents a portion of the RSUs that vested on May 17, 2025 (1,529 of which were cash settled in an amount approximately equivalent to taxes associated with such vesting).