SGSP (Australia) Assets Pty Ltd (SGSPAA), trading as Jemena, is an Australian company that owns, manages or operates energy infrastructure assets in the eastern states of Australia including Queensland and New South Wales, and gas pipelines and gas and electricity distribution networks in Victoria and the Northern Territory.

On 13 July 2000 legislation was passed by the Parliament of Western Australia for the sale of AlintaGas, which listed on the Australian Stock Exchange (ASX) on 17 October 2000.

Alinta acquired infrastructure assets and the Agility business from AGL through a combination of merger and demerger transactions on 25 October 2006.

[3] Alinta was acquired on 31 August 2007 by a consortium comprising Singapore Power International (SPI), the largest utility company in Singapore, and Australia's second-largest investment bank, Babcock & Brown Infrastructure (BBI) and Babcock & Brown Power (BBP)[4] with a bid of A$13.9 billion, outbidding a bid by Macquarie Bank.

In 2014, State Grid Corporation of China acquired a 60% stake in Jemena, and the company's name was changed to SGSP (Australia) Assets Pty Ltd (SGSPAA).