Jadestone Energy plc operates as an independent oil and gas development and production company in the Asia Pacific region. The company holds 100% operated working interests in the Stag oilfield and Montara project located in offshore Western Australia; and Block 46/07 and Block 51 PSCs located in the Malay Basin, offshore southwest Vietnam. It also holds a 90% interest in the Lemang production sharing contract (PSC) located in onshore Sumatra, Indonesia. In addition, the company holds interests in PenMal Assets, including a 70% interest in the PM329 PSC that comprises the East Piatu field; and a 60% interest in the PM323 PSC, which consists of the East Belumut, West Belumut, and Chermingat fields. Jadestone Energy plc is headquartered in Singapore.