X0101 EFFECT 33 LIVE 2020-01-22 15:00:00

S-3

0001549922 Summit Midstream Partners, LP 333-234781 0001586816 Bison Midstream, LLC 333-234781-18 0001586943 DFW Midstream Services LLC 333-234781-16 0001612504 Red Rock Gathering Company, LLC 333-234781-15 0001685848 Polar Midstream, LLC 333-234781-14 0001685851 Epping Transmission Company, LLC 333-234781-13 0001706701 Meadowlark Midstream Company, LLC 333-234781-12 0001586948 Mountaineer Midstream Company, LLC 333-234781-11 0001586946 Summit Midstream Holdings, LLC 333-234781-01