Caltex is a petroleum brand name of Chevron Corporation used in the Asia-Pacific region, the Middle East, and Southern Africa. Headquartered in Singapore, it is also the brand name of non-Chevron petroleum companies in some countries under a trademark licensing agreement with Chevron.

Chevron Corporation is an American multinational energy corporation predominantly specializing in oil and gas. The second-largest direct descendant of Standard Oil, and originally known as the Standard Oil Company of California, it is headquartered in San Ramon, California, and active in more than 180 countries. Within oil and gas, Chevron is vertically integrated and is involved in hydrocarbon exploration, production, refining, marketing and transport, chemicals manufacturing and sales, and power generation.