Antero Midstream Partners 10-K 2018 FY Annual report

Exhibit 32.1

CERTIFICATION OF
CHIEF EXECUTIVE OFFICER
OF ANTERO MIDSTREAM PARTNERS LP
PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Annual Report on Form 10-K of Antero Midstream Partners LP for the year ended December 31, 2018, I, Paul M. Rady, Chief Executive Officer of Antero Midstream Partners LP, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1.This Annual Report on Form 10-K for the year ended December 31, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in this Annual Report on Form 10-K for the year ended December 31, 2018 fairly presents, in all material respects, the financial condition and results of operations of Antero Midstream Partners LP for the periods presented therein.

Date: February 13, 2019

/s/ Paul M. Rady

Paul M. Rady

Chief Executive Officer