Ownership Submission
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 OF SECURITIES

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
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
SUMMIT MIDSTREAM PARTNERS, LLC
   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 __X__ 10% Owner
_____ Officer (give title below) __X__ Other (specify below)
SEE REMARKS
(Last)
(First)
(Middle)
1790 HUGHES LANDING BLVD., SUITE 500, 		 3. Date of Earliest Transaction (Month/Day/Year)
12/15/2015
(Street)

THE WOODLANDS, TX 77380		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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) 12/15/2015   P   68,364 A $ 15.86 (1) 143,641 D  
Common Units (Limited Partner Interests) 12/15/2015   P   7,519 A $ 16.59 (2) 151,160 D  
Common Units (Limited Partner Interests)               5,293,571 I BY: SUMMIT MIDSTREAM PARTNERS HOLDINGS, LLC

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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
SUMMIT MIDSTREAM PARTNERS, LLC
1790 HUGHES LANDING BLVD., SUITE 500
THE WOODLANDS, TX 77380		   X   X   SEE REMARKS
SUMMIT MIDSTREAM PARTNERS HOLDINGS, LLC
C/O SUMMIT MIDSTREAM PARTNERS LP
1790 HUGHES LANDING BLVD., SUITE 500
THE WOODLANDS, TX 77380		   X   X    
ENERGY CAPITAL PARTNERS II, LLC
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		   X   X    
ENERGY CAPITAL PARTNERS II, LP
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		     X    
ENERGY CAPITAL PARTNERS II-A, LP
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		     X    
ENERGY CAPITAL PARTNERS II-B IP, LP
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		     X    
ENERGY CAPITAL PARTNERS II-C (SUMMIT IP), LP
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		     X    
Energy Capital Partners II (Summit Co-Invest), LP
51 JOHN F. KENNEDY PARKWAY, SUITE 200
SHORT HILLS, NJ 07078		     X    

Signatures

 /s/ Steven J. Newby, President and Chief Executive Officer, Summit Midstream Partners, LLC   12/16/2015
**Signature of Reporting Person Date
 /s/ Brock M. Degeyter, Executive Vice President, General Counsel and Secretary of Summit Midstream Partners Holdings, LLC   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II, LP; By: Energy Capital Partners GP II, LP, its General Partner; By: Energy Capital Partners II, LLC, its General Partner; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II-A, LP; By: Energy Capital Partners GP II, LP, its General Partner; By: Energy Capital Partners II, LLC, its General Partner; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II-B IP, LP; By: Energy Capital Partners GP II, LP, its General Partner; By: Energy Capital Partners II, LLC, its General Partner; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II-C (Summit IP), LP; By: Energy Capital Partners GP II, LP, its General Partner; By: Energy Capital Partners II, LLC, its General Partner; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II (Summit Co-Invest), LP; By: Energy Capital Partners GP II Co-Investment (Summit), LLC, its General Partner; By: Energy Capital Partners II, LLC, its Managing Member; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date
 Energy Capital Partners II, LLC; By: /s/ Christopher M. Leininger, Deputy General Counsel   12/16/2015
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $15.21 to $16.17, 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 common units purchased at each separate price within the range set forth above.
(2) The price reported in Column 4 is a weighted average price. These common units were purchased in multiple transactions ranging from $16.24 to $16.90, 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 common units purchased at each separate price within the range set forth above.
 
Remarks:
Energy Capital Partners II, LLC ("ECP"), Energy Capital Partners II, LP ("ECP II"), Energy Capital Partners II-A, LP ("ECP II-A"), Energy Capital Partners II-B IP, LP ("ECP II-B"), Energy Capital Partners II-C (Summit IP), LP ("ECP II-C"), Energy Capital Partners II (Summit Co-Invest), LP ("ECP Summit Co-Invest" and together with ECP II, ECP II-A, ECP II-B and ECP II-C, the "ECP Funds"), collectively hold greater than a majority of the membership interest in Summit Midstream Partners, LLC ("Summit") and are entitled to elect five of the five directors of Summit.  Summit is the sole member of Summit Midstream Partners Holdings, LLC ("SMPH") and as such, may be deemed to have indirect beneficial ownership of the 5,293,571 common units held by SMPH in addition to the 151,160 common units held directly. Accordingly, ECP and the ECP Funds may be deemed to indirectly beneficially own the 5,444,731 common units held by Summit and SMPH but disclaim beneficial ownership except to the extent of their pecuniary interest therein.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.