Christopher L. Hammack

Presidio Petroleum LLC engages in the operation and acquisition of developed assets that focus on operations optimization and technology. The company was founded by Christopher L. Hammack and William Ulrich and is headquartered in Fort Worth, TX.

Presidio Investment Holdings LLC is an investment company, which engages in the acquisition and operation of oil and gas properties. The company was founded by Chris Hammack and William Ulrich and is headquartered in Fort Worth, Texas.

Legend Production Holdings LLC engages in the acquisition and development of long-lived oil and natural gas properties. The firm is a holding company composed of Legend Natural Gas II LP, Legend Natural Gas III LP, and Legend Natural Gas IV LP. The company is headquartered in New York, NY.

Stroud Energy Ltd. (Stroud Oil Properties) explores & produces oil and gas. The company was founded in 1985 and is located in Fort Worth, TX

Trinity River Energy LLC acquires and develops long-lived oil and natural gas properties. It operates in the Barnett Shale, with additional assets and production in South Texas, East Texas, Louisiana and Mississippi. The company was founded in 2014 and is headquartered in Fort Worth, TX.

Atlas Barnett LLC provides oil and gas exploration and development services. It focuses on acquisition, exploration, and development of oil and gas properties. The company was founded in 2008 and is headquartered in Fort Worth, TX.