Charles C. Stephenson

Vintage Petroleum, Inc. was a energy company. The company was engaged in the acquisition, exploitation and exploration of oil and gas properties and the marketing of natural gas and crude oil. The company was headquartered at Tulsa, OK.

Founded in 1992 by John T. Nabb II, Growth Capital Partners LP is a merchant/investment banking and private equity firm headquartered in Houston, Texas. The firm works with both private and public middle-market companies that are based in North America. Their services include: company sales, private equity, recapitalizations, subordinated debt, MBOs, work-outs, restructurings, senior debt and valuations services

Cypress Environmental Partners LP engages in the provision of essential midstream services. The firm's services include pipeline inspection, integrity and hydrostatic testing services to energy companies and vendors. It operates through the following segments: Pipeline Inspection, Pipeline & Process and Water & Environmental Services. The Pipeline Inspection Services segment provides inspection and integrity services on a variety of infrastructure assets, including midstream pipelines, gathering systems and distribution systems. The Pipeline & Process Services segment provides midstream services including hydrostatic testing services and chemical cleaning related to newly-constructed and existing pipelines and related infrastructure. The Water & Environmental Services segment owns and operates Environmental Protection Agency Class II saltwater disposal facilities in the Williston Basin region of North Dakota. The company was founded by Peter C. Boylan III and Charles C. Stephenson Jr. in March 2012 and is headquartered in Tulsa, OK.

The National Petroleum Council operates as a council for national petroleum. The private company is based in Washington.

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.

The Philbrook Museum of Art is a museum located in Tulsa, OK. It is situated in the historic home of Waite and Genevieve Phillips, with extensive formal gardens. The museum is committed to being Tulsa's premier cultural institution, and it houses the H. A. & Mary K. Chapman Library, a reference library.

Premier Natural Resources LLC operates as an oil and gas company. The company was founded on June 12, 2006 and is headquartered in Tulsa, OK.