Sec Form 4 Filing - PETERS JERRY L @ Summit Midstream Partners, LP - 2020-07-10

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 Partners, LP [ SMLP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) See Remarks. (Last) (First) (Middle) C/O SUMMIT MIDSTREAM PARTNERS, LP, 910 LOUISIANA STREET, SUITE 4200 3. Date of Earliest Transaction (MM/DD/YY) 07/10/2020 (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 Units (Limited Partner Interests) 07/10/2020 M 14,198 A $ 0 212,960 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 Phantom Units (DCP) ( 1 ) 07/10/2020 M 14,198 ( 1 ) ( 2 ) Common Units 14,198 $ 0 0 D

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 See Remarks. Signatures /s/ Brock M. Degeyter, Attorney-in-Fact for Jerry L. Peters 07/10/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In connection with Summit Midstream Partners, LP's (SMLP) acquisition of its general partner on May 28, 2020, SMLP recently terminated its Deferred Compensation Plan (DCP). Under the terms of the DCP, the Reporting Person elected to defer his annual equity retainer for the years 2016, 2017, and 2018. As a result of the DCP termination, the Reporting Person is entitled to a distribution of SMLP Common Units in respect of all Phantom Units in the Reporting Person's DCP account on a one-for-one basis. The Reporting Person is also entitled to distribution equivalent rights in respect of each SMLP Common Unit that is distributed to the Reporting Person as a result of the termination of the DCP, providing for a cash payment equal to the accrued distributions from and after the grant date of the Phantom Units. ( 2 )The phantom units and associated DERs do not expire. The phantom units are settled upon vesting in common units (on a one-for-one basis) or in cash, at the discretion of the Issuer.

Remarks: The Reporting Person is a director of Summit Midstream GP, LLC, the general partner of the Issuer (the "General Partner"). The Issuer is managed by the directors and executive officers of the General Partner.

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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