Whitestone Group SA operates as a diversified investment holding company focusing on four main sectors: Financial Services, Industrial, Technology, and Environmental. Its core activities encompass investment and management of subsidiaries engaged in physical gold and metals trading and storage via Gold & Forex International (GFI); precision machining and assembly services through Treestone and TKM Industries; ophthalmic lens metrology via Lambda-X Ophtalmics; and participations in technology and environmental companies such as Probiotic Group and Emulco Group. The company also undertakes investments in various innovation and impact-driven enterprises and offers services including asset protection and industrial technology solutions. Founded in 2010 and headquartered in Brussels, Belgium, Whitestone Group conducts operations primarily across Belgium and other European countries.
Recent major developments include the acquisition of TKM Industries, a Liège-based metal machining and assembly company, through a €5.4 million capital increase, significantly expanding Treestone's footprint in the Belgian and European markets. The group also acquired a majority stake (69%) in Lambda-X Ophtalmics, enhancing its presence in global lens metrology. Additional strategic investments include minority stakes in Battri, a battery technology firm, and Probiotic Group, alongside the takeover of companies such as Evadix and ATIMA which strengthen the group's industrial and technological capabilities. These moves reflect Whitestone’s strategic expansion aimed at scaling its industrial portfolio and reinforcing its leadership in high-value manufacturing and technology sectors.