The Boulle Mining Group is headquartered in Luxembourg and in 1995 founded American Mineral Fields (later renamed Adastra Minerals), listed on the London Stock Exchange’s Alternative Investment Market and the Toronto Stock Exchange. Adastra Minerals developed mining projects in the Democratic Republic of Congo and a joint venture with the government of the Democratic Republic of Congo to re-treat the Kolwezi tailings project. Adastra Minerals was purchased in August 2006 by First Quantum Minerals, a mining company then with dual listings on the Toronto Stock Exchange and the London Stock Exchange.
In 2001, Boulle Mining Group Luxembourg acquired the Sierra Rutile Project (a producer of natural rutile) and of the Sierra Minerals SML Bauxite Mine in Sierra Leone, West Africa which became part of Titanium Resources Group, taken public on the London Stock Exchange’s Alternative Investment Market in August 2005.
His mining group’s subsidiary company, Greenland Gold Resources Ltd is in Greenland exploring for nickel, copper, cobalt, platinum group elements, titanium and graphite.
Boulle Mining Group Luxembourg was the largest shareholder in World Titanium Resources, the Australian Securities Exchange listed discoverers and owners of the Toliara Sands titanium deposit in Madagascar. World Titanium Resources was delisted from ASX on 30 January 2017 and is now privately owned as World Titane Holdings Limited.
Together with the Government of Mauritius, Boulle is one of the three controlling shareholders of Omnicane, a publicly listed company on the Stock Exchange of Mauritius. Omnicane owns sugarcane plantations in Mauritius and produces refined sugar. Omnicane also generates around 30% of the island’s electricity for the Grid and 40% of the country’s renewable bagasse-based energy.
Boulle’s companies have conducted mining and exploration operations for gold, copper, nickel, zinc, and diamonds and other precious and semi-precious stones in South Africa, Namibia, Liberia, Madagascar, Democratic Republic of Congo, Zambia, Finland, Canada, and Brazil.
Since 1996, Boulle has made numerous ongoing donations and contributions to charity, hospitals, museums, animal conservation, bird conservation and to the World Wide Fund For Nature.