PT Saptaindra Sejati (SIS) is one of Indonesia’s leading mining contractors, specializing in coal mining services. As a subsidiary of PT Alamtri Resources Indonesia Tbk (formerly known as PT Adaro Energy Indonesia Tbk), SIS plays a crucial role in supporting Adaro’s mining operations by providing a broad range of services, including contract mining, civil works, infrastructure development, and land logistics. Over the years, SIS has developed a strong reputation for its expertise, efficiency, and commitment to safety in the mining industry.
SIS was established to meet the growing demand for reliable mining services in Indonesia. With its headquarters in Jakarta, the company operates across various mining sites throughout the country. SIS has continuously expanded its operations, investing in advanced technologies, modern equipment, and workforce training to ensure optimal efficiency in coal extraction. Through strategic planning and engineering solutions, SIS has contributed significantly to Indonesia’s coal industry, ensuring the smooth transportation and production of coal for domestic and international markets.

PT Bank Rakyat Indonesia (Persero) Tbk, commonly known as BRI, is one of Indonesia's largest commercial banks and a state-owned enterprise. Established on December 16, 1895, in Purwokerto by Raden Bei Aria Wirjaatmadja, BRI has a long history of providing financial services to the Indonesian population. Over the years, BRI has evolved to meet the changing needs of its customers and has become a key player in Indonesia's banking sector.
BRI offers a wide range of banking products and services, including savings and current accounts, foreign currency deposits, mortgage loans, working capital loans, investment loans, and micro, small, and medium enterprise (MSME) loans. The bank also provides supply chain financing and bank guarantees, catering to both individual and corporate clients. With over 144 million micro deposit customers, BRI has a strong presence across Indonesia, with 449 branches and 13,863 ATMs.

PT Patra Drilling Contractor (PDC) is a subsidiary of PT Pertamina Drilling Services Indonesia (PDSI), which falls under the umbrella of Subholding Upstream Pertamina. Established on September 11, 1981, PDC was the first national company in Indonesia to focus on providing offshore drilling services using domestic equipment. Over the years, PDC has diversified its services to include Accommodation Work Barge (AWB) and Catering services.
PDC has been instrumental in supporting Indonesia's energy sector by providing essential services such as heavy transport equipment, catering, and labor for onshore drilling operations. The company has consistently shown growth and improvement in its performance, with a notable revenue of Rp 2.88 trillion and a net profit of Rp 124 billion in 2024. This achievement was driven by strategic business optimizations, particularly in the Food & Lodging Services (FLS) and Heavy Transport Equipment Services (HTE) units.

PT Reska Multi Usaha, also known as KAI Services, is a subsidiary of PT Kereta Api Indonesia (Persero) established in 2003. The company's primary goal is to support and implement the policies and programs of PT Kereta Api Indonesia, especially in the railway restaurant business and other related services.
The company operates in three core business areas: On Board Services, Integrated Facility Management, and Commercial Services. On Board Services include sales on trains, train cleaning, and passenger amenities. Integrated Facility Management encompasses security, parking, cleaning services, and outsourcing. Commercial Services include restaurants, general services, cafes, and catering.
The origins of PT Reska Multi Usaha date back to the Dutch colonial era when the government provided railway restaurants to cater to passengers' needs during their journeys. In 1971, during the early days of PT Kereta Api Indonesia, a dedicated unit called RESTORKA was established to manage railway restaurants. Initially, RESTORKA offered simple beverages like "Es Siripit," but it expanded its menu over time, including the famous "Nasi Goreng Parahyangan" when the KA Parahyangan train was launched.

PT Aerotrans Services Indonesia, hereinafter more commonly known under the brand Aerotrans, commenced its journey in 1988 under the name PT Mandira Erajasa Wahana (MEW), as a business unit of PT Aero Wisata and a part of the Garuda Indonesia Group. Its core business lies in transportation services, tourism, and corporate mobility solutions, while also serving as a key ground transportation provider supporting the national airline PT Garuda Indonesia (Persero) Tbk.
Based on the Extraordinary General Meeting of Shareholders held on 9 May 2011, the company name was officially changed to PT Aerotrans Services Indonesia, as stated in Deed No. 03 dated 10 May 2011. The company’s Articles of Association have undergone several amendments, most recently Deed No. 8 of 2008, referring to Deed No. 7 dated 31 October 2022 by Notary Mira Aranti Ciptadi, SH., M.Kn., regarding changes to the Board of Directors and Commissioners. This amendment was approved by the Ministry of Justice of the Republic of Indonesia under the decision AHU-AH.01.03-0452502 of 2021, dated 24 September 2021.

PT Bank Rakyat Indonesia (Persero) Tbk, commonly known as BRI, is one of Indonesia's largest commercial banks and a state-owned enterprise. Established on December 16, 1895, in Purwokerto by Raden Bei Aria Wirjaatmadja, BRI has a long history of providing financial services to the Indonesian population. Over the years, BRI has evolved to meet the changing needs of its customers and has become a key player in Indonesia's banking sector.
BRI offers a wide range of banking products and services, including savings and current accounts, foreign currency deposits, mortgage loans, working capital loans, investment loans, and micro, small, and medium enterprise (MSME) loans. The bank also provides supply chain financing and bank guarantees, catering to both individual and corporate clients. With over 144 million micro deposit customers, BRI has a strong presence across Indonesia, with 449 branches and 13,863 ATMs.

ASTRA Infra has more than 28 years of experience as an investor-operator in the Indonesian infrastructure sector. Reflecting the continuous development of its business portfolio, in 2018 ASTRA organized its business lines into Toll Road and Port.
ASTRA Infra consists of PT Astra Infra as the holding company for toll road business and PT Astra Nusa Perdana as the holding company for Logistics Infrastructure businesses.
PT Astra Infra is a subsidiary of Astra Infra, a leading infrastructure investment and operations company in Indonesia. Astra Infra is part of the Astra Group, which has a strong presence in various industries, including automotive, financial services, and infrastructure. PT Astra Infra specifically focuses on toll road development, operation, and management, playing a crucial role in Indonesia’s transportation sector.
The company was established as part of Astra Infra’s strategic expansion into the toll road business. Over the years, Astra Infra has acquired and developed several toll road concessions across Indonesia, contributing to the country’s infrastructure growth. PT Astra Infra serves as the holding company for Astra Infra’s toll road business, overseeing multiple toll road projects that enhance connectivity and economic development.

PT Adaro Andalan Indonesia, formerly known as PT Alam Tri Abadi, was established in 2004. It operates as a holding company with businesses spanning the thermal coal, logistics, land, investments, and power generation sectors. Its operational areas include South Kalimantan, South Sumatra, and Central Kalimantan. The Company and its subsidiaries follow a vertically integrated business model, starting with coal mines as the initial point in their supply chain and culminating with power plants.
The Company has achieved notable milestones since its inception. In 2005, it acquired AI, a thermal coal company that had been producing Envirocoal since 1992 under a Government of Indonesia contract. AI’s production surged in 2006, reaching 34.4 million tonnes. Subsequent acquisitions marked the expansion of the Group, including AL in 2009, MIP in 2011, and SCM, LSA, and PCS in 2013. By 2014, SCM commenced commercial production with 890 thousand tonnes of coal.