Mark D. Whitley

Quicksilver Resources, Inc. was engaged in the acquisition, exploration, development and production of onshore oil and gas in North America. It operated through the Midstream and Exploration & Production segments. The Midstream segment provided natural gas gathering and processing services. The Exploration and Production segment focused on oil and natural gas industry. The company was founded in 1997 and was headquartered in Chester, OH.

Shell Oil Co. manufactures petrochemicals and distributes gas and oil products. The company was founded in 1912 and is headquartered in Houston, TX.

Black Swan Energy Ltd. engages in oil and gas exploration and production services. It focuses on the exploration and development of proven hydrocarbon trends in the Western Canadian Sedimentary Basin. The company was founded by David Frank Maddison, Leanne Juneau, and Jacqueline Mary Sheppard in 2010 and is headquartered in Calgary, Canada.

Chisholm Energy Holdings LLC explores petroleum properties. The company is headquartered in Fort Worth, TX.

Rubicon Oilfield International Holdings LP provides oilfield services and related equipment. It offers below and above ground oilfield services, as well as drilling well construction solutions. The company was founded by Scott Watson in 2015 and is headquartered in Houston, TX.

Rubicon Oilfield International Ltd provides support activities for oil and operations. The firm offers drilling and completion solutions and products. It also offers directional, horizontal well construction, performance, extended reach drilling, hole conditioning and frac plug milling applications. The company was founded by Michael E. Reeves and John B. Griggs in June 2015 and is headquartered in Houston, TX.