Mistral Raises €3B Series D at €21B+, and Samsung Is the Lead

Mistral announced a €3 billion (about $3.5B) Series D on September 8 at a post-money valuation above €21 billion - the largest private tech round ever raised in Europe. The lead is the surprise: Samsung Electronics, with Scaleup Europe Fund (managed by EQT) and PSG Equity co-leading. New investors include Advent, BlackRock funds and the Grand Duchy of Luxembourg; a16z, ASML, General Catalyst, Lightspeed, NVIDIA and Salesforce Ventures re-upped. A year ago the Series C valued the company at €11.7 billion - so roughly a double.

The company's own headline is "sovereign, open-weight AI," and the use of funds is concrete: Arthur Mensch says the money goes into building and owning data centers. That makes Mistral the clearest European counterweight in the agent stack - a frontier-adjacent lab that ships open weights, sells in-region inference, and now owns its compute floor.

Samsung as lead is the strategic read. ASML joined last year as the European supply-chain anchor; now the world's biggest memory maker takes the front seat. The capital stack behind "sovereign AI" is turning into a hardware-vendor alliance - chips, lithography, memory - which tells you who thinks they win when inference demand goes vertical.

Announcement: https://mistral.ai/news/mistral-makes-sovereign-open-weight-ai-to-frontier/