Jeff P. Gunst

Union Drilling, Inc. was provided contract land drilling services and equipment to oil and natural gas producers in the United States. It provided drilling services primarily to major or independent oil and natural gas producers that operate in the exploration and productions areas in the United States. The firm specialized in shallow to deep horizontal drilling in select oil and gas producing basins of the United States. The company was founded in December 1997 and was headquartered in Fort Worth, TX.

aPriori Capital Partners LP (aPriori Capital Partners) is a private equity firm founded in 1985 by Susan C. Schnabel and Colin Taylor. The firm is headquartered in Los Angeles, California.

Summit Gas Resources, Inc. engages in the acquisition, exploration, and development of natural gas reserves. The company was founded in 2003 and is headquartered in Sheridan, WY.

Avista Capital Holdings LP (Avista Capital Partners) is a private equity firm founded in 2005 by Steven Webster and Thompson Dean. The firm is headquartered in New York.

Spartan Offshore Drilling LLC provides offshore drilling services. It provides jack-up well drilling, workover and completion services throughout the Gulf of Mexico and the Cook Inlet Alaska. The firm also focuses on providing its services in the Middle East, Mexico, and Southeast Asia. The company was founded in 2002 and is headquartered in Slidell, LA.

Peregrine Oil & Gas II LLC acquires and manages oil and gas properties. The company was founded on May 2, 2007 and is headquartered in Dallas, TX.

Royal Offshore LLC engages in the exploration and development of oil and natural gas assets in the Gulf of Mexico. The company was founded in 2008 and is headquartered in Corpus Christi, TX.

ACP II Marcellus LLC operates as a holding company with interest in acquiring and exploiting natural gas assets. The company was founded in 2008 and is headquartered in Houston, TX.

Hansa Hydrocarbons Ltd. provides gas exploration services. It aims to grow a high-value business from exploiting the remaining potential for gas across the prolific Permian Basin that extends from the Southern North Sea through onshore Northern Europe. The company was founded on November 5, 2012 and is headquartered in London, the United Kingdom.