[2] In 1837, AGL was given a royal charter charged with the responsibility of lighting Sydney's streets.
Town gas was first stored in holder tanks hewn out of solid sandstone at Darling Harbour.
The Mortlake Ferry was constructed with the express purpose of delivering workers who lived on the north side of the harbour to their workplace.
In the later part of the 20th century, the company diversified into electricity generation, buying a stake in the Loy Yang Power Station and ownership of the Kiewa Hydroelectric Scheme, the Wattle Point Wind Farm, and a peak load gas-powered power station near Hallett in South Australia.
In late 2006, AGL merged with Alinta and then demerged to create separate retail and infrastructure companies.