United Tractors
An Indonesian heavy-equipment, mining-services, resources, construction, and energy group.
Last updated October 17, 2026
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Overview
United Tractors is an Indonesian industrial group whose activities span heavy-equipment distribution, mining contracting, coal mining, gold mining, construction, and energy. The company operates as PT United Tractors Tbk and is a subsidiary of PT Astra International Tbk, one of Indonesia’s largest diversified business groups. Its roots are in the distribution of heavy machinery, but it has progressively developed an integrated business model covering equipment sales, component engineering, equipment rental, maintenance and remanufacturing, mine development and production, mineral processing, infrastructure construction, and power generation. The company was established in 1972 as PT Inter-Astra Motor Works and changed its name to PT United Tractors on October 13 of the same year. In 1973 it became the exclusive Indonesian distributor for Komatsu products, a relationship that formed the foundation of its construction-machinery business. It subsequently added Tadano cranes, Bomag vibratory rollers, UD Trucks, Scania vehicles, agricultural equipment, generators, forklifts, mini excavators, attachments, and parts. Supporting businesses provide engineering and manufacturing through PT United Tractors Pandu Engineering, component reconditioning through PT Komatsu Remanufacturing Asia and PT Universal Tekno Reksajaya, and equipment rental and used-machine sales through PT Multi Prima Universal. United Tractors entered mining contracting in 1989 by establishing PT Pamapersada Nusantara, commonly known as PAMA. PAMA provides mine design, feasibility assessment, infrastructure development, overburden removal, extraction, hauling, barging, transportation, reclamation, and related services. This created a major operating link between the group’s equipment-distribution capabilities and Indonesia’s large mining industry. The group later expanded from contracting into ownership of mining assets. Its coal-mining portfolio is managed primarily through PT Tuah Turangga Agung, or Turangga Resources, and includes thermal and metallurgical coal interests. In 2018, United Tractors acquired a controlling stake in PT Agincourt Resources, which operates the Martabe gold mine in North Sumatra. Gold mining became a formal business line in 2019. The group also entered construction through its investment in PT Acset Indonusa Tbk, which is active in building, civil, and marine engineering. Energy has become another strategic area. United Tractors holds interests in conventional power generation while developing renewable-energy activities through PT Energia Prima Nusantara and related entities. These activities include solar photovoltaic installations, mini-hydropower projects, studies for larger hydropower development, and potential floating-solar, wind, hybrid-battery, and waste-to-energy projects. The company also holds interests in the Tanjung Jati B power plant units 5 and 6 in Central Java. United Tractors’ operational footprint is supported by branches, site-support locations, representative offices, service facilities, and other customer-support points across Indonesia. Its positioning combines original-equipment distribution with lifecycle support and the ownership or operation of industrial assets. The company’s strategic direction increasingly emphasizes diversification beyond traditional coal and heavy equipment into gold, nickel, construction, and renewable energy, while retaining mining and infrastructure as core areas. It remains an active member of the Astra group and a significant participant in Indonesia’s industrial, extractive, and infrastructure economy.
History
United Tractors began operations in 1972 under the name PT Inter-Astra Motor Works, focusing on heavy-equipment distribution. The company adopted the United Tractors name on October 13, 1972. Its early growth was driven by equipment representation agreements, particularly the appointment as Komatsu’s exclusive distributor in Indonesia in 1973. It added Tadano, Bomag, UD Trucks, and other complementary equipment and transportation brands as demand expanded across mining, plantations, construction, forestry, and logistics. In 1983, the company created PT United Tractors Pandu Engineering to enter engineering and manufacturing for heavy-equipment components and attachments. The following year it became the exclusive distributor of UD Trucks, then known as Nissan Diesel. United Tractors also broadened its service capabilities through parts, component repair, equipment rental, used-machine sales, and remanufacturing activities. These investments helped it move beyond simple equipment sales toward a lifecycle-support model. A major strategic turning point came in 1989. United Tractors established PT Pamapersada Nusantara, or PAMA, to provide mining-contracting services. PAMA’s activities cover mine planning, feasibility work, infrastructure, land clearing and waste removal, extraction, hauling, barging, transportation, reclamation, and mine expansion. In the same year, United Tractors became a publicly listed company through listings on the Jakarta Stock Exchange and Surabaya Stock Exchange on September 19. During the 1990s and 2000s, the group developed additional industrial and resource capabilities. It established a quarry and limestone-mining joint venture with Semen Indonesia in 1992, created a Singapore-based equipment-import distribution company in 1995, and opened Komatsu component-remanufacturing operations in Balikpapan in 1997. In 2004, Scania products were added to the distribution portfolio. Beginning in 2007, PAMA and affiliated companies acquired interests in coal concessions and resource companies in Kalimantan. United Tractors also established businesses for machinery rental, used equipment, parts distribution, river coal transport, engine reconditioning, and ship repair and maintenance. The mining portfolio was progressively reorganized. In 2014, the coal-related subsidiaries were consolidated under Turangga Resources, with ownership held by United Tractors and PAMA. The group expanded into construction in 2015 by acquiring a controlling interest in PT Acset Indonusa Tbk. It also invested in gold exploration and established a power-generation company. In 2016 and 2017, it agreed to and completed the acquisition of an 80.1 percent interest in PT Suprabari Mapanindo Mineral, a metallurgical-coal concession in Central Kalimantan. Through PT Bhumi Jati Power, it also developed an independent power producer business and arranged financing for the Tanjung Jati B units 5 and 6 coal-fired power project in Central Java. United Tractors made its most significant move into gold mining in 2018, when its subsidiary PT Danusa Tambang Nusantara acquired 95 percent of PT Agincourt Resources. Agincourt operates the Martabe gold mine in North Sumatra, where construction began in 2008 and production started in 2012. Gold mining became the group’s sixth formal business line in 2019. The company continued to adjust its construction and energy holdings in 2020 and 2021. Capital-market transactions involving Acset changed United Tractors’ indirect ownership position, while the group sold its interest in PT Supra Alphaplus Handal. Renewable-energy subsidiaries formerly associated with PT Bina Pertiwi were transferred to PT Energia Prima Nusantara as part of an internal restructuring. In 2022, United Tractors expanded its renewable-energy portfolio by acquiring a 31.49 percent interest in PT Arkora Hydro Tbk. It also pursued diversification into nickel through agreements involving PT Stargate Pasific Resources and PT Stargate Mineral Asia. These steps reflected an effort to broaden the group’s resources and energy exposure while preparing for changes in the mining and power sectors. United Tractors therefore developed from a machinery distributor into a diversified Indonesian group with linked capabilities in equipment, mining services, resource ownership, construction, conventional power, and renewable energy.
- 2022
Renewable energy and nickel diversification
[1]United Tractors invested in Arkora Hydro and pursued acquisitions connected with nickel-sector development.
- 2018
Acquisition of Agincourt Resources
[1]Through Danusa Tambang Nusantara, the group acquired 95 percent of PT Agincourt Resources, operator of the Martabe gold mine.
- 2015
Expansion into construction
[1]United Tractors formed a construction-industry business line through its acquisition of a controlling interest in Acset Indonusa.
- 1989
Entry into mining contracting and public listing
[1]The company established PAMA and listed its shares on the Jakarta and Surabaya stock exchanges.
- 1973
Komatsu distribution appointment
[1]United Tractors became the exclusive distributor of Komatsu products in Indonesia.
- 1972
Establishment and renaming
[1]The company was established as PT Inter-Astra Motor Works and changed its name to PT United Tractors on October 13.
Products and positioning
An integrated Indonesian industrial and natural-resources group linking heavy-equipment distribution and after-sales support with mining contracting, owned mining assets, construction, and a growing energy portfolio.
Construction and mining machinery · 1973
Komatsu equipment
Komatsu equipment has been central to United Tractors since the company became the brand’s exclusive Indonesian distributor in 1973. The portfolio serves mining, construction, plantations, forestry, and other industrial applications, supported by sales, parts, technical assistance, remanufacturing, and field service.
Cranes, road equipment, trucks, buses, and agricultural machinery · 1974
Complementary equipment and transport brands
United Tractors distributes complementary products including Tadano cranes, Bomag vibratory rollers, UD Trucks, Scania trucks and buses, and selected Kubota agricultural products. These offerings extend the company’s reach from mines and construction sites into transport, public mobility, agriculture, and general industrial use.
Mining services · 1989
Mining-contracting services
PAMA provides integrated services for mine owners, including planning, feasibility assessment, infrastructure development, overburden removal, material extraction, hauling, barging, transportation, mine expansion, reclamation, and revegetation. The business connects United Tractors’ machinery expertise with long-term mine-site operations.
Gold mining · 2012
Martabe gold mine
The Martabe operation in North Sumatra is operated by PT Agincourt Resources, in which United Tractors holds a 95 percent interest through Danusa Tambang Nusantara. The mine covers gold exploration, mining, and processing and began production in 2012.
Energy
Renewable-energy solutions
The group’s renewable-energy activities include solar photovoltaic installations, mini-hydropower projects, and assessments of larger hydro, floating-solar, wind, hybrid-storage, and waste-to-energy opportunities. Energia Prima Nusantara is a principal vehicle for solar development within the group.
Brand decisions
2022
Diversification into renewable energy and nickelStrategyBackground
The group pursued portfolio diversification amid changing energy markets and continued demand for battery-related minerals.
Action taken
United Tractors acquired a 31.49 percent interest in Arkora Hydro and signed conditional agreements concerning two nickel-related companies.
Aftermath
The moves broadened the group’s exposure to renewable power and nickel while retaining its established mining and industrial businesses.
2018
Acquisition of Agincourt ResourcesM&ABackground
United Tractors sought to expand beyond equipment and coal-related activities into precious-metals mining.
Action taken
Through Danusa Tambang Nusantara, it acquired a 95 percent stake in Agincourt Resources.
Aftermath
Gold mining became a distinct United Tractors business line, centered on the Martabe mine.
2014
Restructuring of the coal-mining businessStrategyBackground
United Tractors had accumulated multiple coal-mining subsidiaries and concessions through different group entities.
Action taken
The coal-mining business was reorganized under Turangga Resources, owned by United Tractors and PAMA.
Aftermath
The restructuring created a more centralized platform for managing the group’s coal assets.
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