AGL is one of the largest Australian gas and electricity retailers. They have large investments in the supply of electricity, gas and have invested in sustainable energy businesses such as wind farms and a hydroelectric power station.

The Australian Gas Light Company (AGL) was formed in Sydney, NSW in 1837. It supplied gas for the first public lighting of a street lamp in Sydney in 1841 and was the second company to list on the Australian Stock Exchange. AGL is also a Tier 1 retailer.