PT Dian Swastatika Sentosa Tbk, together with its subsidiaries, engages in the coal mining and trading, power generation, technology, and fertilizer and chemical trading businesses. It operates through Supply of Steam and Electricity, Fertilizer and Chemicals Trading, Rent, and Coal Mining and Trading segments. The company owns mining concessions in South Sumatra, Jambi, Central Kalimantan, and South Kalimantan; and mines and trades in metallurgical coal. It also operates 4 captive power plants located in Tangerang, Serang, and Karawang with a total capacity of 300 megawatts (MW). In addition, the company engages in the provision of research and development for mining, energy, and resources industries; management consulting services; and pulp and wood chip mill, forestry, and trading activities, as well as trading chemicals, pesticides, and fertilizers. Further, it offers pay TV and Internet services, venture capital and management, information and communication, and scientific research and technology services. It operates in Indonesia, China, India, Japan, Korea, rest of South East Asia, the Netherland, Hongkong, Pakistan, Hongkong, and Liberia. The company was incorporated in 1996 and is headquartered in Jakarta, Indonesia. PT Dian Swastatika Sentosa Tbk operates as a subsidiary of PT Sinar Mas Tunggal.