Jadestone Energy Inc., together with its subsidiaries, engages in the production, development, exploration, and appraisal of oil and gas assets in Australia, Vietnam, and the Philippines. The company holds 100% interests in the Stag oilfield and the Montara project located in offshore Western Australia, as well as two gas development blocks in Southwest Vietnam. It also has an option to acquire a 69% interest in the Maari Project situated in New Zealand. As of December 31, 2019, it had proved plus probable reserves of 41.8 million barrels of oil equivalent. Jadestone Energy Inc. is headquartered in Singapore.