Joinder Agreement, dated as of March 18, 2019, by and between EQM Midstream Partners, LP and Centaurus Capital LP

Exhibit 10.3

JOINDER AGREEMENT

This Joinder Agreement is executed by the undersigned pursuant to the Convertible Preferred Unit Purchase Agreement, dated as of March 13, 2019 (the “Agreement”), by and among EQM Midstream Partners, LP, a Delaware limited partnership (the “Partnership”), and the purchasers party thereto (the “Purchasers”), which is incorporated herein by reference. Capitalized terms used but not defined herein shall have the meaning given to such terms in the Agreement.

By the execution of this Joinder Agreement, the undersigned agrees as follows:

1.              The undersigned acknowledges that the undersigned is acquiring 307,566 Series A Preferred Units, subject to the terms and conditions of the Agreement (including the Schedules and Exhibits thereto).

2.              The undersigned hereby joins in, and agrees to be bound by and subject to, the Agreement, with the same force and effect as if the undersigned were originally a Purchaser party thereto.

3.              Any notice required or permitted by the Agreement shall be given to the undersigned at the address listed below.

4.              The Partnership hereby acknowledges and agrees that the undersigned shall be deemed a Purchaser under the Agreement with respect to the number of Series A Preferred Units set forth above and that such Purchaser shall be entitled to all of the rights and benefits, and subject to all of the obligations, of a Purchaser under the Agreement.

(Signature Page Follows)

EXECUTED AND DATED as of this 18th day of March, 2019.

Signature Page to Joinder Agreement to Convertible Preferred Unit Purchase Agreement

Signature Page to Joinder Agreement to Convertible Preferred Unit Purchase Agreement