AGL Energy Ltd (ASX: AGL) is an Australian listed public company involved in both the generation and retailing of electricity and gas for residential and commercial use. The company has an operated generation capacity of 10,984 MW. 85% of the company's generation comes from the burning of coal. The company emits 42,227,180 Total Scope 1 Emissions (t CO2-e). AGL is also a significant investor, owner, and operator, of renewable energy assets.

AGL Energy generates energy from power stations that use thermal power, natural gas, wind power, hydroelectricity, solar energy, gas storage and coal seam gas sources.

Making it the largest fully Integrated energy company, telecommunications company, and utility in Australia, AGL claimed in August 2021 that it had more than 4.5 million residential and business customer accounts across New South Wales, Victoria, South Australia and Queensland. AGL entered the residential and commercial gas market in Western Australia in July 2017. It has large investments in the supply of gas and electricity, and is a significant investor, owner, and operator, of renewable energy assets.

AGL is Australia's largest electricity generator, and the nation's largest carbon emitter.