William C. Rusnack

Atlantic Richfield Co. provides oil and gas extraction and production services . The firm's exploration and production operations are focused primarily in the Gulf of Mexico and the midcontinent in the United States, the United Kingdom North Sea, Indonesia, China and Algeria. The company was incorporated on April 15, 1985 and is headquartered in Warrenville, IL.

American Petroleum Institute (API) is the only national trade association that represents all aspects of America's oil and natural gas industry. Its more than 400 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. They are producers, refiners, suppliers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry.

Premcor USA, Inc. engages in petroleum refining and supplying of unbranded transportation fuels, heating oils, petrochemical feedstock, petroleum coke and petroleum products in the United States. Its products include gasoline, on and off-road diesel fuel, jet fuel, liquefied petroleum gas, petroleum coke and residual oil. The company was founded in 1988 and is headquartered in St. Louis, MO.

The Premcor Refining Group, Inc. provides petroleum refining services. It supplies unbranded transportation fuels, heating oil, petrochemical feedstocks, petroleum coke, and other petroleum products. The company is headquartered in San Antonio, TX.

Sequoia Sciences, Inc. engages in the development of new medicines for the treatment of bacterial infections and cancers. The firm's development programs consist of small molecules targeting bacterial infections and cancers, and vaccines for the treatment and prevention of recurrent urinary tract infections. The company was founded by Gary R. Eldridge, Jr. in 1999 and is headquartered in St. Louis, MO.