Mistral AI closes €3B Series D, post-money valuation tops €21B
On September 12, 2026, Mistral AI announced a €3 billion Series D with post-money valuation above €21 billion, reinforcing Europe’s sovereign open-weight AI push. New investors include Advent, BlackRock, and Luxembourg alongside existing backers NVIDIA, Salesforce Ventures, ASML, a16z, Bpifrance, and others.