Brockstar director of Australian operations Peter Smith told The Australian Financial Review that he could "not confirm nor deny" that Brockstar had made an offer of up to $140 million for all bar one of the aggregated stations.

"We are running the ruler over it at this stage," Mr Smith said.

The US-based Brockstar manages private portfolio investment opportunities and looks at submissions concerning project financing and credit facilities between $US1 million and $US500 million.

The group of properties Brockstar is looking at includes the 205,500 hectare Elizabeth Downs, the 194,600ha Douglas Station and the 209,800ha Tipperary, as well as Litchfield.