Tronox is one of the largest United States-based independent oil and natural gas exploration and production companies, with reserves of more than 1.2 billion barrels of oil, including approximately 242 million of reserves from discontinued operations in the North Sea. The company s producing fields are located in the United States onshore, the Gulf of Mexico and the Bohai Bay area of China. In addition, Tronox explores for oil and gas in its core areas and in world-class proven hydrocarbon trends, including the North Slope of Alaska and offshore Angola, Bahamas, Benin, Brazil, Morocco, and Trinidad and Tobago. Tronox is headquartered in Oklahoma City. Its oil and gas division is headquartered in Houston.