Mistral AI closes €3B Series D led by Samsung, valuation tops €21B

French AI startup Mistral AI announced a €3 billion Series D funding round on September 8, 2026, pushing its post-money valuation above €21 billion in what the company claims is the largest equity raise ever by a European tech firm. The round was led by South Korea's Samsung Electronics, with co-leads EQT's Scaleup Europe Fund and PSG Equity, alongside returning backers including a16z, Nvidia, ASML, and Salesforce Ventures. CEO Arthur Mensch told CNBC the company expects to surpass $1 billion in annual recurring revenue before year-end, serving over 125 enterprise clients across 20 countries. Proceeds will fund an expanding European compute infrastructure, including a Paris-area data centre housing nearly 14,000 Nvidia GPUs and a second facility in Sweden, targeting 200 MW of capacity by end-2027. While Mistral markets itself as a sovereign European AI provider, analysts note its cap table includes significant non-European capital, meaning 'sovereignty' applies to model weights and data residency rather than company ownership.