Astron Energy (Pty) Ltd. is a prominent integrated oil and petroleum products company based in South Africa. It operates one of the largest fuel retail networks in Southern Africa, with around 850 service stations. The company owns the third-largest crude oil refinery in the country, located in Milnerton, Cape Town, which has a daily processing capacity of 100,000 barrels. This refinery produces various petroleum products, including petrol, diesel, jet fuel, liquefied petroleum gas (LPG), and specialty products. Astron Energy also has a lubricants manufacturing plant in Durban, where it blends and markets high-quality lubricants.

Since entering the South African market in 2018, Astron Energy has operated the Caltex brand under license from Chevron and is currently rebranding its service stations to Astron Energy. The company offers a range of products and services, including fuel products, lubricants, and commercial fuel solutions. It serves a diverse customer base, including individual motorists, commercial fleets, and the aviation industry. Astron Energy is committed to corporate social responsibility and holds a Level 1 Broad-Based Black Economic Empowerment (B-BBEE) rating, reflecting its dedication to transformation and inclusivity in South Africa.