PT Maruwai Coal (“MC” or the “Company”) was established in 1998 based on Deed of Establishment No. 5 dated February 5, 1998 is a subsidiary of PT Alamtri Minerals Indonesia Tbk (“AMI”) that produces metallurgical coal. MC holds a Coal Contract of Work (PKP2B) for a concession area covering 24,990 hectares containing 108.7 million tons of metallurgical coal resources and 87.9 million tons of metallurgical coal reserves in East Kalimantan and Central Kalimantan. The Company’s metallurgical coal product, marketed under the brand name of Enviromet, has been warmly received by most international steel producers and is gaining increasing recognition in the global market.

Milestone of the Company began in 2010, when the PT Alamtri Resources Indonesia Tbk Group (“AlamTri Group”) obtained 25% stake in MC. Subsequently, in 2016, the AlamTri Group completed the acquisition of 75% shares in MC, and therefore the full ownership of MC is owned by AlamTri Group. Currently, 99% shares of MC are owned by PT Alam Tri Daya Indonesia and 0,01% share of MC is owned by Adaro International (Singapore) Pte. Ltd.

The Company commenced production of hard coking coal, known as Lampunut Hard Coking Coal, in 2019. In 2020, the Company made its first shipment of Lampunut Hard Coking Coal product.

Since September 2023, the Company’s metallurgical coal is marketed under the Enviromet brand as it reflects its key characteristics. Enviromet’s quality, including ultra-low ash and low phosphorus content improving coke production efficiency and reducing energy consumption, resulting in the production of stronger steel products. Additionally, its high vitrinite content gives it good reactivity and plasticity when blended with other coals. 

At the end of 2024, MC, as a subsidiary of AMI, was placed under the AlamTri Geo pillar, which focuses, among others, on the metallurgical coal business. This forms part of the AlamTri Group's strategic initiatives to create long-term value.

MC operates its businesses with the missions to:

The Company's core values—Integrity, Meritocracy, Openness, Respect, and Excellence—are embodied in the MC Code of Conduct, which applies to the Board of Commissioners, the Board of Directors, supporting bodies, and all employees without exception. The MC Code of Conduct sets out the commitment to uphold high standards in interactions with all stakeholders, as well as the principles and behaviors that must be observed in every engagement with stakeholders.

MC is committed to ensuring that the Code of Conduct is understood and complied with. Any suspected violations of the Code of Conduct will be investigated and addressed in accordance with the applicable procedures.