Added: Abraxas, Comstock Resources, Contango, Goodrich Petroleum, Lonestar, Natural Gas Services, Summit Midstream Partners, Transatlantic Petroleum. Also included: Altus Midstream, American Electric Power, Atmos Energy, Basic Energy Services, Black Stone Minerals, Cabot, CenterPoint Energy, CSI Compressor, Diamondback Energy & Viper Energy, Dominion Energy, Earthstone, Enbridge, Energy Transfer, Enlink, EOG, Exxon, FTS International, Genesis Energy, Holly Energy Partners, Kimbell Royalty Partners, Kosmos, Magellan Midstream, Magnolia Oil and Gas, Marathon, Matador Resources, Montage Resources, MRC Global, NewPark, NuStar, Oasis Petroleum, Occidental Petroleum, Oncor, ONEOK, Phillips 66, Pioneer Natural Resources, Plains All American, ProPetro, Quanta Services, Range Resources, Ring Energy, Saudi Aramco, Silverbow Resources, Smart Sand, SM Energy, Southwestern Energy, Superior Energy Services, Talos, Tellurian, TETRA, Texas Pacific Land Trust, USA Compression, US Silica, VAALCO, Weatherford, Western Midsteam, Whitewater Midstream.