On May 9, 2016, Summit Midstream GP, LLC (the general partner") announced that Mr. Matthew F. Delaney was appointed to the Board of Directors of the general partner. Mr. Delaney will serve as an Energy Capital Partners Designated Director. Mr. Delaney has been an investment professional at Energy Capital Partners since 2011 and currently serves on the board of Chieftain Sand and Proppant, LLC. Prior to joining Energy Capital Partners, Mr. Delaney worked in the Investment Banking Division at Morgan Stanley focusing on energy mergers and acquisitions. Mr. Delaney replaces Mr. Christopher M. Leininger, who resigned from the Board on May 9, 2016.