Warren J. Ludlow

XTO Energy Inc. operates as a domestic energy producer engaged in the acquisition, development, and discovery of oil and natural gas properties in the United States. It specializes in the development of tight gas, shale gas, coal bed methane, and unconventional oil resources. The company was founded by Steve Palko, Bob Simpson and Jon Brumley in 1986 and is headquartered in Spring, TX.

Brigham Exploration Co. is an independent exploration, development and production company. The company engages in the exploration and development of onshore crude oil and natural gas reserves. Its exploration and production activities are performed primarily in the onshore Texas Gulf Coast, the Anadarko Basin of northwest Oklahoma, the Texas Panhandle and west Texas. Brigham Exploration was founded by Ben M. Brigham in 1990 and is headquartered in Austin, TX.