Top Energy Companies in Australia List by Market Cap as of August 2026

Woodside Petroleum is an Australian oil and gas company with a global presence and headquartered in Perth, Australia.

Santos is one of the leading independent oil and gas producers in the Asia-Pacific region, supplying the energy needs of homes, businesses and major industries across Australia and Asia. Headquarters is in Australia.

Power generation, electricity distribution and gas distribution company with headquarters is in Australia. Origin is Australia based Energy Company and it has a rich heritage in energy exploration, production, power generation and retailing. Origin is a leading provider of energy to homes and businesses throughout Australia. Origin has extensive operations across Australia, Papua New Guinea and the South Pacific covering electricity generation, upstream unconventional gas and LNG and LPG.

Washington H Soul Pattinson And Company is a significant investment house with a portfolio encompassing many industries including it traditional field of pharmaceuticals as well as mining, building materials, property investment, telecommunications, financial services and other equity investments. The headquarters is in Australia.

AUSNET SERVICES own and operate the Victorian electricity transmission network, one of five electricity distribution networks, and one of three gas distribution networks in Victoria. Electric utility and gas utility company with headquarters is in Australia.

AMPOL LIMITED Refines, Distributes and Sells Oil and Gas Products with headquarters is in Sydney, Australia.

Transport fuels and lubricants selling and supplying company. Caltex rebranded to Ampol Limited.

As on Feb-2022, AMPOL LIMITED has 880 retail stores.

For year ending Dec-2021 AMPOL LIMITED Annual Revenue was 21,420 Million AUD and Annual Net Income was 560 Million AUD.

Coal mining company with headquarters is in Australia.

Coal mining company with headquarters is in NSW, Australia.

Worley provides engineering, procurement and construction services and expertise to the upstream, midstream, chemicals, power, and mining and minerals sectors. The headquarters is in Australia.

Coal mining company with headquarters is in Australia.