Origin Energy was formed 18 February 2000, as a result of a
spin-off from
Boral.
SAGASCO (formerly known as the South Australian Gas Company) became part of Origin Energy as part of the demerger. Between 2001 and 2002, Origin acquired a
Victorian electricity retailer licence from distributors
Powercor and
CitiPower. In 2004, the
SEAGas pipeline was completed, linking the Victorian and
South Australian gas markets. During this time, Origin obtained 50% interest in the
Kupe Gas Field and
Edison Mission Energy's 51.4% interest in New Zealand's
Contact Energy. On 27 November 2006, the
Government of Queensland announced the sale of Sun Retail, the former retailing arm of
Energex to Origin for $1.202 billion. On 15 December 2010, Origin Energy announced that it would purchase the retail divisions of
Country Energy and
Integral Energy from the
Government of New South Wales, at a total cost of
A$3.25 billion, as well as entering a GenTrader agreement with
Eraring Energy (in which Origin supplies fuel, pays certain charges, and can dispatch and sell electricity output, while Eraring Energy owns, operates and maintains the power stations). The transaction was completed on 1 March 2011. In June 2022, it was announced that Origin had been fined $17 million for breaching its obligations to customers experiencing hardship and payment difficulties. In August 2022, the company announced a goal for net-zero direct and indirect emissions by 2050. In November 2022, Origin received a
takeover offer from a
Brookfield Asset Management and
EIG Global Energy Partners consortium for . Origin agreed to the offer in March 2023, which sees its energy market business owned by Brookfield and its partners, while EIG's MidOcean Energy owns Origin's integrated gas business. In October 2023, the takeover was approved by the
Australian Competition and Consumer Commission. The acquisition was terminated in December 2023 after Origin shareholders led by its largest investor,
AustralianSuper, opposed the deal, failing to meet the required 75% threshold. In November 2025, Origin entered into an agreement to acquire the retail energy business of Energy Locals. ==Core business==