Robert M. Wohleber

Kerr-McGee Corp. is an energy and inorganic chemical. It subsidiaries, joint ventures and other affiliates have operations throughout the world. The company core business, which include exploration, production of oil and gas resources. It was founded in 1929 and is headquartered Oklahoma City, Ok

Tronox, Inc. manufactures and produces titanium dioxide. It offers mineral sands, titanium dioxide pigments, and electrolytic chemicals. The company was founded on June 6, 2005 and is headquartered in Oklahoma City, OK.

Union Drilling, Inc. was provided contract land drilling services and equipment to oil and natural gas producers in the United States. It provided drilling services primarily to major or independent oil and natural gas producers that operate in the exploration and productions areas in the United States. The firm specialized in shallow to deep horizontal drilling in select oil and gas producing basins of the United States. The company was founded in December 1997 and was headquartered in Fort Worth, TX.

OGE Enogex Partners LP provides integrated natural gas midstream services. Its operations are organized into three businesses: natural gas transportation and storage, natural gas gathering, processing and natural gas marketing. The company was founded on May 30, 2007 and is headquartered in Oklahoma, OK

Oil Investment Corp. Ltd. provides investment services. The company is headquartered in Hamilton, Bermuda.

Part of The Mosaic Co., Freeport Mcmoran Sulphur, Inc. produces, purchases, transports, and markets sulfur. The company is based in New Orleans, LA.

Kerr-McGee Holdings, Inc. manufactures basic inorganic & organic chemicals. The company was founded in 2000 and is headquartered in Oklahoma City, OK.