Common use of ELECTION INFORMATION BOOKLET Clause in Contracts

ELECTION INFORMATION BOOKLET. This information booklet is provided to holders of the common units representing limited partner interests (the “Common Units”) in Antero Midstream Partners LP (“Antero Midstream”). It answers frequently asked questions, briefly describes your options and provides information and instructions on how to make your election. We urge you to read the instructions to the enclosed Election Form carefully and review the Frequently Asked Questions below, as well as the Joint Proxy Statement/Prospectus dated , (the “Joint Proxy Statement/Prospectus”), which you received in connection with Antero Midstream’s special meeting of unitholders to be held on , 2019. After reviewing these materials, please complete the Election Form and send it in the enclosed envelope to the exchange agent for the merger, American Stock Transfer & Trust Company, LLC (the “Exchange Agent” or “AST”). If you have additional questions after reading these materials, you should contact the information agent for the transaction, MacKenzie Partners, Inc., toll free within the United States and Canada at (▇▇▇) ▇▇▇-▇▇▇▇. Persons outside the United States and Canada may call (▇▇▇) ▇▇▇-▇▇▇▇ (collect). The deadline for RECEIPT of your Election Form is 5:00 P.M., New York City time, on , 2019 (the “Election Deadline”). You may return your Election Form, IRS Form W-9 or IRS Form W-8, as applicable, and Notice of Guaranteed Delivery (if applicable) at any time prior to the Election Deadline.

ELECTION INFORMATION BOOKLET. This information booklet is provided to holders of the common units representing limited partner interests (the “Common Units”) in Antero Midstream Partners LP (“Antero Midstream”). It answers frequently asked questions, briefly describes your options and provides information and instructions on how to make your election. We urge you to read the instructions to the enclosed Election Form carefully and review the Frequently Asked Questions below, as well as the Joint Proxy Statement/Prospectus dated , (the “Joint Proxy Statement/Prospectus”), which you received in connection with Antero Midstream’s special meeting of unitholders to be held on March 8, 2019. After reviewing these materials, please complete the Election Form and send it in the enclosed envelope to the exchange agent for the merger, American Stock Transfer & Trust Company, LLC (the “Exchange Agent” or “AST”). If you have additional questions after reading these materials, you should contact the information agent for the transaction, MacKenzie Partners, Inc., toll free within the United States and Canada at (▇▇▇) ▇▇▇-▇▇▇▇. Persons outside the United States and Canada may call (▇▇▇) ▇▇▇-▇▇▇▇ (collect). The deadline for RECEIPT of your Election Form is 5:00 P.M., New York City time, on March 4, 2019 (the “Election Deadline”). You may return your Election Form, and IRS Form W-9 or IRS Form W-8, as applicable, and Notice of Guaranteed Delivery (if applicable) at any time prior to the Election Deadline.