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
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(Print or Type Responses)
1. Name and Address of Reporting Person *
SUMMIT MIDSTREAM PARTNERS HOLDINGS, 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) _____ Other (specify below)
SEE REMARKS
(Last)
(First)
(Middle)
C/O SUMMIT MIDSTREAM PARTNERS LP, 2100 MCKINNEY AVENUE, SUITE 1250		 3. Date of Earliest Transaction (Month/Day/Year)
03/17/2014
(Street)

DALLAS, TX 75201		 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) 03/17/2014   S   5,050,000 D $ 37.4325 (1) 9,641,397 D  

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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 HOLDINGS, LLC
C/O SUMMIT MIDSTREAM PARTNERS LP
2100 MCKINNEY AVENUE, SUITE 1250
DALLAS, TX 75201		   X   X   SEE REMARKS
SUMMIT MIDSTREAM PARTNERS, LLC
2100 MCKINNEY AVENUE, SUITE 1250
DALLAS, TX 75201		   X   X    
SUMMIT MIDSTREAM GP, LLC
C/O SUMMIT MIDSTREAM PARTNERS, LLC
2100 MCKINNEY AVENUE, SUITE 1250
DALLAS, TX 75201		     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/ Brock M. Degeyter, Senior Vice President, General Counsel and Secretary, Summit Midstream Partners Holdings, LLC   03/19/2014
**Signature of Reporting Person Date
 /s/ Steven J. Newby, President and Chief Executive Officer, Summit Midstream Partners, LLC   03/19/2014
**Signature of Reporting Person Date
 /s/ Steven J. Newby, President and Chief Executive Officer, Summit Midstream GP, LLC   03/19/2014
**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   03/19/2014
**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   03/19/2014
**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   03/19/2014
**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   03/19/2014
**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   03/19/2014
**Signature of Reporting Person Date
 /s/ Christopher M. Leininger, Deputy General Counsel, Energy Capital Partners II, LLC   03/19/2014
**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) On March 17, 2014, (a) the Issuer sold 5,300,000 common units representing limited partner interests in the Issuer ("Common Units") and Summit Midstream Partners Holdings, LLC ("SMPH") sold 5,050,000 Common Units, including 1,350,000 Common Units sold pursuant to the underwriters option to purchase additional Common Units, in a public underwritten offering; and (b) the general partner of the Issuer, of which SMPH is the sole owner, purchased 109,198 general partner units to maintain its 2.0% general partner interest in the Issuer.
 
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 four of the five directors of Summit.  Summit is the sole member of SMPH and as such, may be deemed to have indirect beneficial ownership of the common and subordinated units reported herein. Accordingly, ECP and the ECP Funds may be deemed to indirectly beneficially own the common units and subordinated units held by SMPH but disclaim beneficial ownership except to the extent of their pecuniary interest therein.

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