Sec Form 4 Filing - PETERS JERRY L @ Summit Midstream Corp - 2024-08-01

FORM 4 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 PETERS JERRY L 2. Issuer Name and Ticker or Trading Symbol Summit Midstream Corp [ SMC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O SUMMIT MIDSTREAM PARTNERS, LP, 910 LOUISIANA STREET, SUITE 4200 3. Date of Earliest Transaction (MM/DD/YY) 08/01/2024 (Street) HOUSTON, TX77002 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 Common Stock 08/01/2024 A( 1 )( 2 ) 30,239 ( 3 ) A 30,239 D

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other PETERS JERRY L C/O SUMMIT MIDSTREAM PARTNERS, LP 910 LOUISIANA STREET, SUITE 4200 HOUSTON, TX77002 X Signatures /s/ James D. Johnston, Attorney-in-Fact for Jerry L. Peters 08/02/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On August 1, 2024 (the "Effective Time"), in connection with the corporate reorganization of Summit Midstream Partners, LP (the "Partnership"), the Partnership converted from a master limited partnership to a C corporation (the "Corporate Reorganization") through the merger between the Partnership and Summit SMC NewCo, LLC ("Merger Sub"), a wholly-owned subsidiary of Summit Midstream Corporation (the "Corporation"), wherein Merger Sub merged with and into the Partnership (the "Merger"), with the Partnership surviving the Merger as a wholly-owned subsidiary of the Corporation. ( 2 )Pursuant to Rule 12g-3(e), the Corporation is the successor issuer to the Partnership for purposes of Section 16. ( 3 )Pursuant to the Merger, immediately prior to the Effective Time, all outstanding common units representing limited partner interests in the Partnership have been converted into the right to receive shares of Common Stock, par value $0.01 per share, of the Corporation.

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).

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