Mistral AI closed a €3 billion Series D — described as the largest equity fundraising round ever completed by a European technology company — at a €21 billion post-money valuation, approximately $24.4 billion. Samsung Electronics led the round; EQT's Scaleup Europe Fund and PSG Equity co-led; new investors include the Grand Duchy of Luxembourg sovereign fund and BlackRock; existing backers Andreessen Horowitz, Nvidia, and Salesforce Ventures participated. French President Macron framed the raise as building "a third way in AI" alongside South Korea — explicitly positioning Mistral as the non-US alternative for governments and enterprises that require AI sovereignty. The company operates across 20 countries, hosts third-party open-weight models alongside its proprietary offerings, and gives enterprise customers direct control over model selection and data-processing regions. Capital will fund scaled compute, European data infrastructure, and a stated target of 1 gigawatt of European AI compute capacity by 2030. Samsung's lead investment is the geopolitically significant detail: the world's largest memory chip manufacturer and a major smartphone platform is actively hedging its AI exposure away from US hyperscalers, not by building its own models but by anchoring a European alternative. The Luxembourg sovereign fund and BlackRock entries reflect the broader market signal that AI infrastructure is being priced and structured as critical national infrastructure — a category in which sovereign capital belongs alongside institutional investors.