Jadestone Energy PLC is an independent upstream oil and gas development and production company with a focus on the Asia Pacific region. It has a portfolio of production and development assets in Australia, Indonesia, Malaysia, and Vietnam. It owns 100% operating interests in the producing Montara project and the Stag oilfield, offshore Western Australia. Montara Project is located in production licences AC/L7 and AC/L8 in the Timor Sea, over 630 kilometers offshore Western Australia. It also owns over a 33.33 % working interest in the Cossack, Wanaea, Lambert, and Hermes (CWLH) oil fields development, offshore Western Australia. It owns a 60% operated working interest in the PM323 license, and a 70% operated working interest in the PM329 licenses, all located offshore Peninsular Malaysia. It holds an operating 90% interest in the Lemang PSC, onshore Sumatra, Indonesia. It also holds a 100% operated working interest in Block 46/07 PSC (Nam Du) and Block 51 PSC (U Minh and Tho Chu).