Common Contracts

37,250,000 Common Shares ANTERO MIDSTREAM GP LP COMMON SHARES REPRESENTING LIMITED PARTNER INTERESTS UNDERWRITING AGREEMENT May 3, 2017

Underwriting Agreement • May 9th, 2017 • Antero Midstream GP LP • Natural gas transmission • New York

• Contract Type
  Underwriting Agreement
• Filed
  May 9th, 2017
• Company
  Antero Midstream GP LP
• Industry
  Natural gas transmission
• Jurisdiction
  New York

The undersigned understands that Morgan Stanley & Co. LLC, Barclays Capital Inc. and J.P. Morgan Securities LLC (the “Representatives”) propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with Antero Midstream GP LP, a Delaware limited partnership (the “Partnership”), providing for the public offering (the “Public Offering”) by the several Underwriters, including the Representatives (the “Underwriters”), of 37,250,000 common shares (the “Shares”) representing limited partner interests in the Partnership (the “Common Shares”).

ANTERO MIDSTREAM GP LP COMMON SHARES REPRESENTING LIMITED PARTNER INTERESTS FORM OF UNDERWRITING AGREEMENT

Underwriting Agreement • April 17th, 2017 • Antero Resources Midstream Management LLC • Natural gas transmission • New York

• Contract Type
  Underwriting Agreement
• Filed
  April 17th, 2017
• Company
  Antero Resources Midstream Management LLC
• Industry
  Natural gas transmission
• Jurisdiction
  New York

The undersigned understands that Morgan Stanley & Co. LLC, Barclays Capital Inc. and J.P. Morgan Securities LLC (the “Representatives”) propose to enter into an Underwriting Agreement (the “Underwriting Agreement”) with Antero Midstream GP LP, a Delaware limited partnership (the “Partnership”), providing for the public offering (the “Public Offering”) by the several Underwriters, including the Representatives (the “Underwriters”), of [·] common shares (the “Shares”) representing limited partner interests in the Partnership (the “Common Shares”).