what's exaion?
Exaion is a subsidiary of the French state-owned energy company EDF Group, established in 2020 to repurpose retired supercomputers for blockchain, cloud computing, and data center services. It specializes in providing secure, low-carbon blockchain solutions, including crypto custody services for financial institutions and node operations on networks like Tezos and Chiliz Chain. Exaion focuses on energy-efficient computing using nuclear power surpluses and has expanded into high-performance computing (HPC) and AI infrastructure. In 2025, MARA Holdings acquired a 64% stake in Exaion for $168 million to leverage its capabilities for Bitcoin mining and AI expansion in Europe.
Exaion joined Canton Network as a Super Validator, offering infrastructure services.
Joined Canton Network as a Super Validator, providing infrastructure services alongside other major financial and crypto infrastructure participants.
MARA's Exaion acquisition includes a contractual clause that restricts EDF's access to computing power for AI and Bitcoin operations.
MARA partners with AURADINE for domestic ASIC supply and engages with NEOM's $5B, 1.5 GW DataVolt AI project at Oxagon industrial zone.
Mestrallet, former ENGIE CEO, serves as bridge between MARA/Exaion and EDF along with French government policy circles at Élysée and Bercy. MARA positions its French operations as policy-grade compute infrastructure with EU-provenance BTC mining capabilities.
Exaion serves enterprise clients including Deloitte and Nvidia for its nuclear and hydro-powered HPC facilities in France and Canada.
Strategic partnership between FII Institute and MARA forms ahead of FII9 Riyadh event. Exaion's energy infrastructure comprises 114 MW wind capacity with 20-year utility life.
Exaion operates nuclear-backed data centers in both France and Canada. MARA pivots to AI inference services as part of its compute expansion through the Exaion acquisition.
Acquired 64% ownership stake in Exaion, with NJJ Capital as strategic partner for AI/HPC infrastructure from France.
MARA's position in Exaion HPC unit includes an immersion-cooling patent portfolio.
MARA acquires Exaion, gaining access to EDF's nuclear power infrastructure in France for mining and compute operations.