Hartono

Part of Strand Minerals (Indonesia) Pte Ltd., PT Weda Bay Nickel engages in nickel mining. The company is based in Jakarta, Indonesia.

PT Sumberdaya Arindo, founded in 2012, is a leading Indonesian nickel mining company in Indonesia that applies good mining practices to provide sustainable positive impacts for all stakeholders. The company is based in Jakarta, Indonesia and ultimately controlled by the Government of Indonesia through its subsidiary, Antam. The company aims to achieve technical excellence in mining operations, improve the quality of human capital, implement operational excellence with competitive costs, and support community empowerment and shareholder value optimization. PT Sumberdaya Arindo targets a nickel ore production capacity of 13.5 million wmt by 2029.

PT Gag Nikel is an Indonesian company that engages in nickel mining. The company is based in Jakarta, Indonesia and ultimately controlled by the Government of Indonesia.

PT Nusa Halmahera Minerals is an Indonesian company that engages in the production, exploration, and processing of gold ores. Haji Romo Nitiyudo Wachjo has been the CEO of the joint venture company since 2020.