An Australian-listed group is acquiring Luxembourg geophysical instruments and software firm Advanced Logic Technology (ALT) in a deal reported to be worth €55.8 million.
Mining technology giant IMDEX Limited, which has entered into a binding acquisition agreement with the Luxembourg borehole imaging company, said the move aims to integrate ALT’s high-performance downhole rock-property sensor systems and its WellCAD software into IMDEX’s broader “digital earth solutions” suite. The combination will bring together sensor hardware, software and data services under a unified platform.
Founded in 1993 and headquartered in Redange-sur-Attert, ALT develops hardware and software used across the upstream energy sector, including hydrogeology and groundwater studies, geothermal energy exploration and monitoring, mining and mineral exploration, environmental and geotechnical investigations, and oil and gas. The company today supports clients in more than 120 countries and operates a US subsidiary, Mount Sopris Instruments.
IMDEX describes the acquisition as a “transformative step” that will expand its offering to customers in the mining, energy, civil, environmental and groundwater sectors, leveraging ALT’s global distribution network.
“IMDEX’s acquisition is a proud moment for me, my fellow shareholder Annick Henriette, our management and all our staff,” said ALT founder Jean-Luc Deltombe. “IMDEX’s global platform and technical depth provide ALT and MSI the scale to accelerate innovation and deliver even greater value across mining, geotechnical, water and energy sectors.”
The transition plan includes the appointment of new management and a phased exit of ALT’s founding shareholders. Deltombe stepped back from day-to-day operations in 2023, while co-shareholder Annick Henriette retired in 2025.
The transaction, advised by PwC Luxembourg, remains subject to foreign direct investment approval in Luxembourg and other customary closing conditions. Completion is expected in early 2026.
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