St Barbara Limited, along with its various subsidiaries, is primarily engaged in the entire gold value chain, encompassing exploration, development, extraction, and commercialization. The company oversees three principal operational divisions: Leonora Operations, Simberi Operations, and Atlantic Operations. In addition to its gold focus, it also conducts exploration for silver deposits.
Its key assets include the Gwalia underground mine situated in Leonora, Western Australia; the Simberi gold mine located in Papua New Guinea's New Ireland province; and the Atlantic Gold operations in Nova Scotia, Canada. Established in 1986, St Barbara Limited maintains its corporate headquarters in Perth, Australia.