David Sparkman

Part of AT&T, Inc., Southwestern Bell Telephone Co. provides telecommunication services. The company is based in San Antonio, TX.

Dollar Thrifty Automotive Group, Inc., through its subsidiaries provides commercial car rental services. It operates company owned stores under the Dollar brand and the Thrifty brand, operates reservation centers conducts sales and marketing activities for both brands. The company was founded on November 24, 1997 and is headquartered in Tulsa, OK.

Thompson Pipe & Steel Co. manufactures water transmission pipe. The company is headquartered in the United States.

HealthHealthAllies, Inc. provides consumer-driven healthcare programs. The company was founded in July 1999 and is headquartered in Eden Prairie, MN.

Thrifty Rent-A-Car System, Inc. provides commercial car rental services. It offers a selection of rental vehicles ranging from economy, compact, mid-size & standard cars. The company was founded in 1958 and is headquartered in Tulsa, OK.

Strateline Industries LLC manufactures non-woven products. The private company is based in Rogers, AR.

Oilfield Management Services LLC is a diversified oilfield service company. It provides horizontal drilling and well stimulation services primarily in the onshore unconventional tight sands and shale oil and natural gas. The company operates through two segments: Completion & Production Services and Horizontal & Directional Drilling Services. The Completion & Production Services segment provides pressure pumping and pressure control services. The Horizontal & Directional Drilling Services segment is designed to drill unconventional wells. The company was founded on September 29, 2005 and is headquartered in Oklahoma City, OK.