Mistral has closed a €3 billion Series D round, pushing its post-money valuation from roughly €12 billion a year ago to over €21 billion — the largest single equity raise in European tech history, led by Samsung. But on the same week's open-source leaderboards, Mistral Medium 3.5 trails Qwen and Kimi, and isn't in the same league as closed-source American models. The money has walked through the door, but the models are still chasing outside it. The doubled valuation in a year is a bet that European customers will keep paying a premium for "not depending on America" over the long haul.
€3 billion in the bank, model benchmarks haven't kept up
It took less than a year to double the valuation, but developer reputation didn't double with it. Did this largest single equity round in European history buy money, or time?
This €3 billion round puts the valuation above €21 billion. Samsung Electronics led, with EQT's Scaleup Europe Fund and PSG Equity co-investing.
The new investor list includes Advent, funds managed by BlackRock, and the Grand Duchy of Luxembourg. Existing backers a16z, NVIDIA, ASML, and General Catalyst all piled in further.
A year ago, ASML took a €1.3 billion stake at a roughly €12 billion valuation; this March, the company also secured an $830 million loan to build its own data centers. Mistral says this is the largest single equity round in European tech history.
But the open-source rankings didn't double along with the valuation. Mistral Medium 3.5 has been left behind by Qwen and Kimi on the leaderboards, and isn't in the same league as American closed-source models(models that don't release their weights or training details). On the other side, the business fundamentals: customers span 20 countries, with over 125 enterprises including Airbus, ASML, and HSBC. Since the start of 2026, it has ridden a wave of substitution demand as European customers look to break free from American providers.
Money is in, but the €21 billion valuation isn't just about the model
With €3 billion in fresh funding and the valuation doubling to €21 billion in a year, the war chest is being replenished on two fronts at once.
After the Series D, Mistral's valuation stands above €21 billion. Samsung Electronics led, with EQT's Scaleup Europe Fund and PSG Equity co-leading. New investors include Advent, funds managed by BlackRock, and the Grand Duchy of Luxembourg, while existing backers a16z, NVIDIA, ASML, and General Catalyst followed on. Mistral says this is the largest equity round in European tech history.
That number didn't come out of nowhere. A year ago, when ASML put in €1.3 billion, the valuation hovered around €12 billion. Doubling in a year wasn't driven by model benchmarks — it was driven by a geopolitical narrative. Samsung, Luxembourg, and EQT's sovereign fund dedicated to backing European tech all cast their votes for "Europe standing on its own, free of the US."
Beyond equity, this March Mistral also signed an $830 million loan to build out its own data centers. Equity plus debt, the war chest is being refilled on two parallel tracks: one buys compute, the other buys pricing power.
On the model front, Mistral Medium 3.5 has been outpaced by Qwen and Kimi in the open-source camp, and isn't in the same league as American closed-source models. It operates in 20 countries and serves over 125 enterprise customers, including Airbus, ASML, and HSBC, and has been riding a wave of European demand to ditch American suppliers since the start of 2026.
The money is in, the story holds together, but the benchmarks say what they say — who closes the gap between price tag and performance?