Sec Form 4 Filing - Thuillier Lawrence J. @ EAGLE ROCK ENERGY PARTNERS L P - 2015-10-08

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 Thuillier Lawrence J. 2. Issuer Name and Ticker or Trading Symbol EAGLE ROCK ENERGY PARTNERS L P [ EROC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VP & Corporate Controller (Last) (First) (Middle) EAGLE ROCK ENERGY PARTNERS, L.P.,, P.O. BOX 2968 3. Date of Earliest Transaction (MM/DD/YY) 10/08/2015 (Street) HOUSTON, TX77252 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 Representing Limited Partner Interests 10/08/2015 A 184,308 A 251,263 D Common Units Representing Limited Partner Interests 10/08/2015 F 9,612 D 0 D Common Units Representing Limited Partner Interests 10/08/2015 D 251,263 D 0 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 Thuillier Lawrence J. EAGLE ROCK ENERGY PARTNERS, L.P., P.O. BOX 2968 HOUSTON, TX77252 VP & Corporate Controller Signatures /s/ Lawrence J. Thuillier 10/13/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On October 8, 2015, pursuant to the Agreement and Plan of Merger dated as of May 21, 2015 (the "Merger Agreement"), by and among Eagle Rock Energy Partners, L.P. (the "Partnership"), Eagle Rock Energy GP, L.P., Vanguard Natural Resources, LLC ("Vanguard") and Talon Merger Sub, LLC ("Merger Sub"), Merger Sub merged with and into the Partnership (the "Merger"), with the Partnership continuing as the surviving entity and as a wholly owned indirect subsidiary of Vanguard. ( 2 )Pursuant to the Merger Agreement, each Partnership common unit issued and outstanding immediately prior to the effective time of the Merger was converted at such time into the right to receive 0.185 Vanguard common units or, in the case of fractional Vanguard common units, cash (without interest and rounded up to the nearest whole cent) in an amount equal to the product of (i) such fractional part of a Vanguard common unit multiplied by (ii) the average closing price for a Vanguard common unit as reported on the NASDAQ Global Select Market for the ten consecutive full trading days ending at the close of trading on October 7, 2015. On the effective date of the Merger, the closing price of a Vanguard common unit was $9.31. ( 3 )Pursuant to the Merger Agreement, the vesting of Partnership restricted units (including performance units issued under the Partnership Long-Term Incentive Plan (the "Partnership LTIP")) held at the effective time by an employee that (i) did not receive an offer of employment from Vanguard in connection with the Merger, (ii) received such an offer, but such offer was an unqualified offer (as described in the Merger Agreement) and such employee declined such offer or (iii) was a member of the Partnership's board of directors, was accelerated by the Partnership in accordance with the terms of the Partnership LTIP and the applicable award agreements as if the employee's service relationship was terminated without "cause" or by "involuntary termination," as applicable, on or following a "change of control" (each term as defined in the applicable award agreement) and such Partnership restricted units were converted into Vanguard restricted units equal to the result of ( 4 )(i) the number of Partnership restricted units subject to such award multiplied by (ii) 0.185, rounded down to the nearest whole Vanguard restricted unit. The number of common units acquired by the reporting person in respect of the Partnership performance units was based on the calculation of the Partnership's satisfaction of the performance conditions set forth in the applicable Partnership performance unit award agreements based on performance through the effective time. ( 5 )The reporting person elected to surrender Vanguard common units (which had a closing price of $9.31 per unit on the effective date of the Merger) to satisfy tax withholding liabilities that arose in connection with the conversion, vesting and settlement of Partnership performance units pursuant to the Merger (as described further in (3)(4) above) in accordance with Rule 16b-3.

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