Sec Form 3 Filing - Muller Cole @ Talen Energy Corp - 2024-07-09

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Muller Cole 2. Issuer Name and Ticker or Trading Symbol Talen Energy Corp [ TLN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP & GM, Cumulus Growth (Last) (First) (Middle) 2929 ALLEN PKWY, SUITE 2200 3. Date of Earliest Transaction (MM/DD/YY) 07/09/2024 (Street) HOUSTON, TX77019 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 2 ) ( 1 ) ( 1 ) Common Stock 26,352 D Performance-Based Restricted Stock Units ( 4 ) ( 3 ) ( 3 ) Common Stock 118,584 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Muller Cole 2929 ALLEN PKWY SUITE 2200 HOUSTON, TX77019 EVP & GM, Cumulus Growth Signatures /s/ John C. Wander, attorney-in-fact 07/09/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents restricted stock units ("RSUs") that, subject to the Reporting Person's continued employment, will vest in two equal annual installments on May 17, 2025 and May 17, 2026. ( 2 )Each RSU represents a contingent right to receive one share of the 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 Company. ( 3 )The performance-based restricted stock units ("PSUs") will vest or lapse on May 17, 2026. Vesting is subject to the achievement of performance goals by the reporting person and the reporting person's continued employment. 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 maximum level of performance (or 200%). ( 4 )Each PSU represents a contingent right to receive one share of common stock or its cash equivalent, as determined at the time of settlement by the Company.

Remarks: Exhibit 24.1 - Power of Attorney

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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