PT Delta Dunia Makmur Tbk. was established in 1990 and, through its primary subsidiary, PT Bukit Makmur Utama, is the second-largest coal mining contractor in Indonesia, based on production volumes, providing service to some of the largest coal producers in Indonesia. PT Delta Dunia Makmur Tbk. is listed on the Main Board of the Indonesian Stock Exchange (IDX ticker: DOID). DOID is headquartered in Jakarta, Indonesia.