X0306 4 2016-01-21 0001603286 Dominion Midstream Partners, LP DM 0000715957 DOMINION RESOURCES INC /VA/ 120 TREDEGAR STREET RICHMOND VA 23219 1 1 Common Units (Limited Partner Interests) 2016-01-21 4 P 0 13633.0000 25.7537 A 50009794.0000 I See Footnote Common Units (Limited Partner Interests) 2016-01-21 4 P 0 11062.0000 26.3031 A 50020856.0000 I See Footnote Common Units (Limited Partner Interests) 2016-01-22 4 P 0 6262.0000 27.8979 A 50027118.0000 I See Footnote Units were purchased pursuant to a 10b5-1 plan. Price reflects the weighted average purchase price. Units were purchased at prices ranging from $25.11 to $26.10. The filer undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of units purchased at each separate price. Dominion Resources, Inc. ("Dominion") may be deemed to indirectly own 5,112,139 common units representing limited partner interests ("Common Units") in the Issuer held directly by its wholly-owned subsidiary Dominion MLP Holding Company II, Inc. and 1,094,401 Common Units held directly by its wholly-owned subsidiary Dominion MLP Holding Company III, Inc. Additionally, Dominion may be deemed to indirectly own an additional 11,847,789 Common Units and 31,972,789 subordinated units representing limited partner interests ("Subordinated Units") in the Issuer held directly by its indirect wholly-owned subsidiary Dominion MLP Holding Company, LLC. Each Subordinated Unit will convert into one Common Unit at the end of the subordination period described in the Issuer's Registration Statement on Form S-1 (File No. 333-194864). The Subordinated Units have no expiration date. Price reflects the weighted average purchase price. Units were purchased at prices ranging from $26.12 to $26.42. The filer undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of units purchased at each separate price. Price reflects the weighted average purchase price. Units were purchased at prices ranging from $27.59 to $27.99. The filer undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of units purchased at each separate price. Dominion Midstream GP, LLC (the "General Partner") serves as the general partner of the Issuer and manages the Issuer's operations and activities on the Issuer's behalf through the General Partner's directors and executive officers. The General Partner is ultimately controlled by Dominion Resources, Inc. ("Dominion") and some of Dominion's directors and executive officers also serve as directors and executive officers of the General Partner. Due to its ultimate control of the General Partner, Dominion has the right to appoint the board of directors of the General Partner. /s/ Karen W. Doggett, Assistant Corporate Secretary, Dominion Resources, Inc. 2016-01-25