Randolph L. Howard

Unocal Corp. explores, develops, produces, and markets crude oil and natural gas. The firm also produces geothermal energy in Indonesia and the Philippines and makes petroleum coke, graphite's and silicon carbide materials. The company was founded on October 17, 1890 and is headquartered in El Segundo, CA.

Renewable Energy Group, Inc. is a holding company engaged in the production and trade of biofuel and renewable chemicals. It operates through the following segments: Biomass-based Diesel and Services. The Biomass-based Diesel segment processes waste vegetable oils, animal fats, virgin vegetable oils and other feedstocks and methanol into biomass-based diesel. The Services segment offers services for managing the construction of biomass-based diesel production facilities and managing ongoing operations of third-party plants and collects fees related to the services provided. The company was founded in August 2006 and is headquartered in Ames, IA.

Part of Chevron Corp., Unocal Thailand is a company that explores for, develops, produces, and markets crude oil and natural gas. The private company is based in Bangkok, Thailand.