Big round · 8 September 2026

Mistral AI raises $3.5B Series D led by Samsung Electronics

By Millionrounds ResearchPublished 16 September 2026

Mistral AI, based in France, has raised $3.5B in a Series D led by Samsung Electronics, announced on 8 September 2026. 22 other investors joined. It is the 9th largest equity round we recorded in the twelve months to that date, and the 2nd largest Series D of 76. The median Series D over the same period was $160M, so this one is 22 times that. Its previous round on record was a round of $1.2B in June 2026, 3 months earlier.

Raised$3.5B4 sources reported it
StageSeries D2 earlier rounds on record
Investors231 named as lead
Where FRFrance

AICloudGenerative AI

How big is it?

Against every equity round we recorded in the twelve months to 8 September 2026. Ranks count companies, so the same raise reported twice is counted once.

#9equity round of the last twelve months
#2Series D of 76 in that time
#1round in France, of 46
This round$3.5B
Median Series D$160M

22 times the median Series D of the last twelve months.

Who invested

Also in the round

Funding history

  1. September 2026Series D$3.5B
  2. June 2026Round$1.2B
  3. September 2025Series C$2.0B

$6.7B raised across the 3 rounds we hold.

Reported by

  1. Samsung Catalyst Fund8 September
  2. Crunchbase News8 September
  3. TechCrunch8 September
  4. Ventureburn8 September

The round's figures come from these reports; each link opens the original.

Other big rounds that week

TThe Boring Co.$3.0B GrowthMach Industries$600M Series CCognition$2.0B Series EHarvey$550M GrowthRRightway Healthcare$155M Series EClay$115M Series D
The companyMistral AI on Millionrounds→Weekly roundupWeek of 7 September→Monthly roundupSeptember 2026→