Andrew Benjamin Walz

Chevron USA, Inc. provides petroleum refining services and operates gasoline stations. It produces and transports crude oil and natural gas. The company was founded in 1984 and is headquartered in San Ramon, 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.

GS Caltex Corp. is engaged in the oil refining business. The company was founded on May 19, 1967 and is headquartered in Seoul, South Korea.

Part of Chevron Corp., Singapore Refining Co. Pte Ltd. is a joint venture between Singapore Petroleum Company Limited and Chevron Singapore Pte. The company is based in Singapore, Singapore. Singapore Refining Company Private Limited operates a refinery that is capable of processing 290,000 barrels of crude oil per day to produce fuel products and chemical feedstocks that are supplied to domestic markets and overseas export markets under the brand labels of its shareholders. Ltd. William Lewis Stone has been the CEO of the Singaporean company since 2010.