Roger L. Jarvis

National Oilwell, Inc., is a company which designs, manufactures and markets mechanical components for both land and offshore drilling rigs as well as land drilling and well servicing rigs. The company has it's headquarters in Houston, Texas. It is a subsidiary of National Oilwell Varco, Inc.

Spinnaker Exploration Co. was an independent energy company engaged in the exploration, development and production of natural gas and oil in the U.S. Gulf of Mexico. It was headquartered in Houston, TX.

HighPoint Operating Corp. engages in the development, acquisition, and exploration of oil and natural gas resources. It holds interest in the Denver-Julesburg Basin and the Uinta Oil Program in the Uinta Basin. The company was founded by William J. Barrett, Fredrick J. Barrett, and John Frank Keller in January 2002 and is headquartered in Denver, CO.

Common Resources LLC explores and produces oil and gas in the onshore basins of the Gulf Coast, West Texas and Mid-Continent regions. The company was founded by Robert M. Snell and Elliott Pew in 2007 and is headquartered in The Woodlands, TX.

Common Resources III LLC engages in oil and gas exploration services. It involves in exploration, operations, land and administrative personnel capable of managing an oil and gas property from an initial concept to final production. The company was founded by Thomas H. Jones, Roger L. Jarvis and Elliott Pew in 2012 and is headquartered in Dallas, TX.

Jagged Peak Energy, Inc. operates as an independent oil and natural gas company, which focuses on the acquisition and development of unconventional oil and associated liquids-rich natural gas reserves in the Southern Delaware Basin. The company was founded in September 2016 and headquartered in Denver, CO.

Common Resources II LLC provides oil and gas exploration services. It is oil and gas company focused on developing domestic unconventional oil and gas assets. The company is headquartered in The Woodlands, TX.