On August 5, 2013, Mr. Robert M. Wohleber was appointed to the board of directors of Summit Midstream Partners, LP. Mr. Wohleber will serve on the conflicts and audit committees of the Board. Mr. Wohleber will also serve on the newly formed compensation committee along with Mr. Spinner and Mr. Lane, who will serve as chairman of the committee.

Also, on August 5, 2013, Mr. Christopher Leininger was appointed to the Board. Mr. Leininger will serve as an Energy Capital Partners Designated Director. Mr. Leininger was selected to serve as a director due to his affiliation with Energy Capital Partners, which controls the company general partner.