Twenty Seven Co. Limited engages in mineral exploration activities in Western Australia, New South Wales, and Northern Territory. The company explores for gold, nickel, copper, and cobalt deposits. It holds interest in the Rover, the Midas, the Perseus, the Calvert, and the Peartree projects. The company was formerly known as UraniumSA Limited and changed its name to Twenty Seven Co. Limited in July 2018. Twenty Seven Co. Limited was incorporated in 2006 and is based in Adelaide, Australia.