DCP Midstream LP

DCP Midstream, LP gathers and sells natural gas and natural gas liquids. It also designs and installs pipelines, and owns and operates 65 plants and 57,000 miles of pipeline. 

Chevron USA Inc.

Chevron USA Inc., formerly known as Gulf Oil, produces crude oil, natural gas, and natural gas liquids, and also refines products made from oil.  

Dakota Plains Holdings Inc.

Dakota Plains Holdings, Inc. supposed purpose was “transloading” or loading crude oil onto railway cars in New Town, North Dakota. As of 2017, it was in bankruptcy.

Anadarko Petroleum Corporation

Anadarko Petroleum Corporation explores for, develops, and produces oil and gas, primarily in three geographic areas: the Delaware Basin in Texas, the Gulf of Mexico, and the Denver Julesberg Basin in Colorado.

TechnipFMC plc

TechnipFMC plc provides services for oil and gas projects, including subsea, surface, onshore, and offshore services, around the world. The company was formed from a merger of FMC Technologies, Inc. and the French company Technip SA and is headquartered in London.

Sheridan Production Company LLC

Sheridan Production Company, LLC is a private equity firm that invests in matuer oil and gas producing properties through its investment funds. Its management oversees the operations of its properties.

AmeriGas Propane Inc.

AmeriGas Propane, Inc. sells propane on a retail basis to residential, commercial, industrial, agricultural, and motor fuel customers. 

Tesco Corporation

Tesco Corporation provides highly-engineered, technology-based products for drilling, servicing, and completing wells. 

CITGO Petroleum Corporation Inc.

CITGO Petroleum Corporation, Inc. is an American refiner, transporter, and seller of transportation fuels, lubricants, and petrochemicals. It is owned by the Venezuelan company Petróleos de Venezuela, S.A. 

Shell Oil Company

Shell Oil Company is a wholly-owned subsidiary of Royal Dutch Shell, one of the largest oil companies in the world. Shell is one of the US's largest oil and natural gas producers, natural gas and gasoline marketers, and petrochemical manufacturers. There are approximately 15,000 Shell-branded gas stations in the US.