AGL Energy is one of Australia's largest retailers of electricity and gas. It services over 4 million retail electricity and gas accounts in Australian, or about one-third of the market. Profit is dominated by energy generation, underpinned by its low-cost coal-fired generation fleet. Founded in 1837, it is the oldest company on the ASX. Generation capacity comprises a portfolio of renewable, peaking, intermediate, and base-load electricity generation plants.