Our principal subsidiary, PT Bukit Makmur Mandiri Utama (BUMA), is a leading provider of mining services to some of the largest miners in Indonesia and Australia (through BUMA Australia Pty Ltd). In June 2024, through PT Bukit Makmur Internasional (BUMA International), it acquired the majority of Atlantic Carbon Group, Inc. (ACG) and became the leading producer of ultra-high-grade anthracite coal in the USA, further strengthening the Group's global footprint in the mining industry. In 2023, Delta Dunia Group expanded its portfolio with the addition of two new subsidiaries: PT Bukit Teknologi Digital (BTech), developing AI deep learning technologies to improve operational efficiency, reduce emissions, and minimize Occupational Health and Safety (OHS) operational risks and PT BISA Ruang Nuswantara (BIRU), a social enterprise dedicated to education, vocational schools, and fostering circular economy.