altus midstream company owns gas gathering, processing, and transmission assets in the permian basin of west texas. as of december 31, 2019, its assets included approximately 178 miles of in-service natural gas gathering, 55 miles of residue gas, and 38 miles of natural gas liquids (ngl) pipelines; three cryogenic processing trains; and an ngl truck loading terminal with six lease automatic custody transfer units and eight ngl bullet tanks. the company is based in houston, texas. altus midstream company is a subsidiary of apache midstream llc.