PT Dian Swastatika Sentosa Tbk is an Indonesia-based company. The Company is engaged in the business of power generation, wholesale trading, coal mining and trading, multimedia, forestry and infrastructure. It carries out its business activities through four businesses, namely power and steam generation, coal mining and trading, technology, and fertilizers and chemicals trading business. The Company carries out its business activities in thermal coal mining and trading through PT Golden Energy Mines Tbk (GEMS) and its subsidiaries, as well as PT DSSE Energi Mas Utama and its subsidiaries. It operates four captive power plants with a total capacity of over 300 megawatts, located in Serang, Tangerang, and Karawang. The Company manages its technology business through subsidiaries of PT DSST Mas Gemilang, among others. In the fertilizer and chemical trading business, the Company carries out its business activities through PT Rolimex Kimia Nusamas, a subsidiary.