In September 2025 Bloomberg News named the three Mistral AI founders France's first AI billionaires, with about $1.1 billion each. In July 2025 Challenges had already placed Arthur Mensch among the 500 wealthiest people in France. Mistral is not listed, so these figures rest on the company's private valuation.
Mistral AI was incorporated on 28 April 2023. A seed round of €105 million followed in June, and Mistral 7B, an open-weight model, came out in September. A €385 million Series A in December 2023 valued the company at more than €2 billion.
In June 2024 Mistral raised €600 million at a €5.8 billion valuation. In September 2025 it raised about €2 billion at about €12 billion, with ASML taking roughly 11%. Investors include Lightspeed, Andreessen Horowitz, Microsoft, BNP Paribas and NVIDIA.
In March 2026 the company took on $830 million of debt to build data centres. In September 2026 Samsung took a stake and Mistral was valued at about €21 billion. The founders' stakes are not public, so no exact personal figure exists.