PT Delta Dunia Makmur Tbk (Delta Dunia Group), the parent company of PT Bukit Makmur Mandiri Utama (BUMA), BUMA Australia Pty Ltd (BUMA Australia), PT Bukit Teknologi Digital (B-TECH), and PT BISA Ruang Nuswantara (BIRU), reports robust volume and EBITDA growth, alongside achieving its lowest Net Debt-to-EBITDA ratio during the first half of 2023 (1H 2023).