The company was established under the name of PT Inter-Astra Motor Works with a focus on heavy equipment distribution.

PAMA acquired PT Prima Multi Mineral ("PMM"), which holds mining concession rights in Rantau, South Kalimantan.

After PUT II, UT's ownership of ACSET through PT Karya Supra Perkasa ("KSP") became 64.8%.

Specifically, the company established a subsidiary of PT United Tractors Pandu Engineering (“UTPE”) to offer engineering and manufacturing services for heavy equipment components and attachments, PT Komatsu Remanufacturing Asia (“KRA”) and PT Universal Tekno Reksajaya (“UTR”) to offer engine reconditioning services, and PT Bina Pertiwi (“BP”) to sell and lease Kubota agricultural tractors, Kubota and Komatsu generators, Komatsu mini excavators and Komatsu forklifts, as well as sales of commodity parts products.

[citation needed] United Tractors runs the Mining Contracting business through PT Pamapersada Nusantara (PAMA).

The coal mining business is run through its subsidiary, PT TuahTurangga Agung (“Turangga Resources”).

The gold mining business is run by PT Agincourt Resources (PTAR), of which United Tractors has a 95% stake.

ACSET's specialty integrates specialist work and general construction to effectively produce competitive costs.

ACSET has completed projects such as Pacific Place, Thamrin Nine, Gandaria City, Kota Kasablanka, West Vista Jakarta, Alila Seminyak, Jakarta-Cikampek II Elevated Toll Road, and others.

To date, EPN has installed solar PV in a number of companies within UT and Astra group, reaching 1.2MWp.

In addition, the company has a 25% share ownership in the Tanjung Jati B Power Plant (PLTU) units 5 and 6 in Jepara Regency, Central Java.