Private company

Forminière

Belgian colonial enterprise

The Société internationale forestière et minière du Congo (French; lit. 'International Forestry and Mining Company of the Congo'), known by the shorthand Forminière, was a mining company in Belgian Congo. Founded in 1906 with an intended diversified portfolio of activities, it soon found diamonds in the Kasai region and made diamond mining its main activity. It was headquartered in Tshikapa from 1912 to 1954, when it relocated its head office to Bakwanga (renamed in 1963 as Mbuji-Mayi).2 It ceased to exist in 1961.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • Industrymining industry1
  • HeadquartersBrussels1

The Société internationale forestière et minière du Congo (French; lit. 'International Forestry and Mining Company of the Congo'), known by the shorthand Forminière, was a mining company in Belgian Congo. Founded in 1906 with an intended diversified portfolio of activities, it soon found diamonds in the Kasai region and made diamond mining its main activity. It was headquartered in Tshikapa from 1912 to 1954, when it relocated its head office to Bakwanga (renamed in 1963 as Mbuji-Mayi).2

Corporate structure

Forminière sits at the top of its group. 4 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Forminière Brussels
    • Société d'Elevage et de Culture au Congo Belge Subsidiary · Belgium
    • Société Minière de la Tele Subsidiary · Belgium
    • Société Minière du Luebo Subsidiary · Belgium

Built from subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

The story

In the early years of the 20th century, the Congo Free State propaganda war persuaded Leopold II of Belgium that he might not be able to keep personal ownership of the Congo Free State for much longer. In response, he attempted to secure continued economic benefit from it by creating three companies that would control the territory's principal resources.

The so-called "companies of 1906" were the Union Minière du Haut-Katanga (UMHK), Compagnie du chemin de fer du bas-Congo au Katanga (BCK), and Forminière. All three were established in the fall of 1906 with advice from Jean Jadot and Hubert Droogmans, respectively with initial capital of 10 million, 2 million, and 3.5 million Belgian francs. The Forminière's capital, initially divided into 7,000 shares, was initially held by the Congo Free State (50 percent); Leopold's Foundation (8 percent); a group of American investors led by Thomas Fortune Ryan and Daniel Guggenheim (25 percent); and a group of Belgian investors led by the Société Générale de Belgique (SGB, 17 percent). This made Forminière an unusual case for that era of a colonial company that was directly state-controlled, even though that state was itself still private property of Leopold.

Leopold's plans were thwarted when the Free State was taken over by the Belgian Government in 1908, however, as he was not allowed to keep the Foundation of the Crown for himself. Instead, the Foundation was terminated, and its assets and liabilities were directly assumed by the Belgian state. The Belgian state thus retained a 55-percent ownership stake in the Forminière.

From Wikipedia’s article on Forminière, shared under CC BY-SA 4.0.3

Products and brands

  • diamond

Listed on Wikidata.1

Subsidiaries and ownership

Subsidiaries

  • Société Minière de la Tele
  • Société Minière du Luebo
  • Société d'Elevage et de Culture au Congo Belge

From Wikidata.1

Timeline

  1. 1961Dissolved Dissolved1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3