PT Alamtri Resources Indonesia Tbk is an integrated mining and energy company. The Company focuses on metallurgical coal mining, mineral processing, mining services, and renewable energy businesses. Its segments include Coal mining and trading, Mining Services, Logistics and Other. The Company, through its subsidiary, PT Alamtri Minerals Indonesia Tbk engages in metallurgical coal mining. The Company, through its subsidiary PT Saptaindra Sejati (SIS), operates a mining services business. SIS is a mining contractor, offering various mining services, including mine planning and operations, mining equipment provision, construction work, equipment rental services, machinery repair services, and other mining-related services. Additionally, the Company operates in the renewable energy sector through its subsidiary PT Alamtri Renewables Indonesia. Its flagship metallurgical coal product, Enviromet, is a hard coking coal which is used in steelmaking.