The Australian Gas Light Company (AGL) was an Australian gas and electricity retailer. It was formed in Sydney in 1837 and supplied town gas for the first public lighting of a street lamp in Sydney in 1841. AGL was the second company to list on the Sydney Stock Exchange. The company gradually diversified into electricity and into a number of different locations. After a combination of a merger and demerger with Alinta in 2006, it was replaced by AGL Energy.