PT BUMA Internasional Grup Tbk (DOID) previously known as PT Delta Dunia Makmur Tbk, engages in coal mining contractor service. It was established in November 1990 under the name of PT Daeyu Poleko Indonesia, initially engaged in manufacturing various types of textile for export. The company has undergone several name changes over years, until it changed to the current one in 2009. It also changed business model 2 times; in 2008 focused on developing commercial and industrial property in Indonesia, then in 2009 it started to engage in coal mining services that operates through its subsidiary.