InterGrain Pty Ltd was formed in October 2007 when the WA government and the Grains Research and Development Corporation (GRDC) privatised the Department of Agriculture and Food Western Australia's wheat breeding program. In 2009-10 those two shareholders expanded the InterGrain business by transferring the barley breeding program from DAFWA to InterGrain.
Corporatisation of the wheat and barley programs was consistent with the Australia-wide trend to encourage private sector investment in plant breeding, and has enabled the establishment of a commercial wheat and barley breeding entity delivering elite cereal varieties to Australian growers. In August 2010, US agribusiness giant Monsanto became the third shareholder of InterGrain.
As at 2016, three major shareholders hold: 48.7% - WA Government, 25.3% - GRDC, 26% - Monsanto