About us

UMSI is a family-owned group that has been operating in West Africa for over a century, and is an international leader in the fields of transport, mining logistics and industrial processing.

In West Africa, UMSI operates as UMS Guinea, an integrated logistics solutions provider in the road and air transport sectors and with a major focus on fuel importation and distribution and the transportation of ore.

In 2021, UMSI acquired French company Alteo, a global leader in speciality aluminas.

UMSI is also the main shareholder in Africa's largest mining projects:

  • With a 30% stake in the Société Minière de Boké (SMB), UMS is responsible for the overland transportation of the ore, as well as coordinating the work of 20 Guinean contractor companies, involving more than 1,300 trucks. SMB exported over 34 million tonnes of bauxite in 2020, and is the largest African exporter of bauxite to China.
  • Additionally, UMSI is a shareholder in Winning Consortium Simandou (WCS), which operates Blocks I and II of the Simandou mega-iron deposit, the largest iron ore deposit in the world.

By becoming a stakeholder in its clients' businesses, UMSI is guaranteeing that its services will be carried out in accordance with its clients' commitments and in compliance with the applicable regulations.


Our commitments

UMSI is committed to society, the environment and the economy, as an employer, an industrialist and a key player in the logistics and industrial arena. The group therefore does everything possible to ensure that it has a positive impact on its projects, its clients and the economies in which UMSI operates.

The company's CSR policies, both in its operations and in its commercial offering, are integral to UMSI's overall approach to progress and performance.

parallax background


United Mining Supply (UMS) has been the trusted partner of its mining, oil and industrial clients in Guinea and the sub-region since 2002. As an integrated logistics solutions provider, UMS operates in the road and air transport sectors, focusing mainly on fuel importation and distribution and the transportation of ore.



Alteo is a leading producer of high value-added specialty alumina and, in 2020, achieved a turnover of 190 million euros. Drawing on over 125 years of experience and know-how in the alumina industry, Alteo strives to ensure the best quality and development of its products through its integrated application laboratory and its research and development team. In order to pursue its development, Alteo has implemented a sustainable growth strategy based on a robust CSR approach and its innovation capacity.




Société Minière de Boké (SMB), founded in 2014, is the leading producer and exporter of bauxite in Guinea and on the African continent, with 34 million tonnes of bauxite exported in 2020. UMSI is a joint shareholder in the company, along with Singapore's Winning Shipping Ltd, a first-class Asian shipowner, and Shandong Weiqiao, a major Chinese aluminium producer. In keeping with the company's commitment to the Sustainable Development Goals (SDGs), the design of SMB's industrial project takes into account the environmental and social aspects throughout the entire chain of operations.



In 2019, Winning Consortium Simandou (WCS) won the international tender for the operation of Blocks I and II of the Simandou iron ore deposit. WCS has undertaken to export its ore through Guinea by building a 650-kilometre railway line and a multimodal port in Matakong in the Forécariah prefecture on the coast of Guinea. WCS also plans to establish an agricultural growth corridor along the railway line and to build a steel mill in partnership with other operators once the feasibility studies have been approved.



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