Billy Zane Parker

Laredo Petroleum, Inc. is an exploration and production company with headquarters in Tulsa, Oklahoma. Laredo's strategy is to make strategic acquisitions and participate in drilling joint ventures having upside potential in the targeted area of the Mid-Continent and Permian Basin Regions of the United States. The company was founded in May 2007 and is headquartered in Tulsa, OK

Williams Partners LP owns, operates and acquires a diversified portfolio of complementary energy assets. It is engaged in the business of gathering, transporting and processing natural gas and fractionating and storing natural gas liquids. The company operates its business through the following segments: Gas Pipeline and Midstream Gas and Liquids. The Gas Pipeline segment includes interstate natural gas pipelines and pipeline joint venture investments. The Midstream Gas and Liquids segment includes natural gas gathering, treating and processing business and is comprised of several wholly owned and partially owned subsidiaries. Williams Partners was founded in February 2005 and is headquartered in Tulsa, OK.

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.

Latigo Petroleum, Inc. explores and develops oil and gas. It conducts exploration and development drilling programs and makes strategic acquisitions in its targeted area of the Mid-Continent Region of the United States. The firm's targeted area includes the Permian, Anadarko and Arkoma basins located in Texas, New Mexico, Oklahoma and Arkansas. The company was founded in 1996 by Randy A. Foutch and is headquartered in Tulsa, OK.