[2][3] In February 2009 a takeover offer by China Minmetals was recommenced for acceptance by Oz Mineral's board of directors.

[4] The proposal was one of three high-profile moves by Chinese firms to acquire stakes in the Australian mineral sector in early 2009.

In March 2009 the Government of Australia blocked the sale, citing national security concerns about the proximity of the Prominent Hill Mine to the RAAF Woomera Range Complex.

[7][8] The Martabe gold project in Indonesia was sold to China Sci-Tech Holdings in the same month.

[8][9] In 2015, with its activities concentrated on the Prominent Hill mine and the nearby Carapateena prospect in South Australia, OZ Minerals moved its headquarters from Melbourne to Adelaide.