As a subsidiary of PT Toba Sejahtra Group, Toba Bara has developed into a major coal producer that operates on three (3) concession area in East Kalimantan coal mine.
Sebagai anak perusahaan PT Toba Sejahtra Group, Toba Bara telah berkembang menjadi produsen batubara utama yang beroperasi pada 3 (tiga) konsesi area tambang batubara di Kalimantan Timur.