Big round · 29 October 2026

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Upwind raises $400M Series C led by Bessemer Venture Partners

By Millionrounds ResearchPublished 29 October 2026

Upwind, based in United States, has raised $400M in a Series C led by Bessemer Venture Partners, announced on 29 October 2026. 11 other investors joined. It is the 143rd largest equity round we recorded in the twelve months to that date, and the 29th largest Series C of 233. The median Series C over the same period was $100M, so this one is 4.0 times that. Its previous round on record was a Series B of $250M in January 2026, 9 months earlier.

Raised$400M10 sources reported it
StageSeries C2 earlier rounds on record
Investors121 named as lead
Where USUnited States

AICybersecurity

How big is it?

Against every equity round we recorded in the twelve months to 29 October 2026. Ranks count companies, so the same raise reported twice is counted once.

#143equity round of the last twelve months
#29Series C of 233 in that time
#98round in United States, of 1,308
This round$400M
Median Series C$100M

4.0 times the median Series C of the last twelve months.

Who invested

Also in the round

Funding history

  1. October 2026Series C$400M
  2. January 2026Series B$250M
  3. November 2024Series A$100M

$750M raised across the 3 rounds we hold.

Reported by

  1. thecyberwire.com27 October
  2. decrypt.co28 October
  3. investx.fr28 October
  4. NewsCord28 October
  5. opentools.ai28 October
  6. Silicon Angle28 October
  7. srnnews.com28 October
  8. Leap Ventures28 October
  9. Tech Funding News28 October
  10. helpnetsecurity.com28 October

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

Other big rounds that week

Fractile$700M Series CServal$150M Series CCohere$5.0B Series EApproaching.AI$193M Series BGroup14 Technologies$169M Series DDDulo$130M Seed
The companyUpwind on Millionrounds→Weekly roundupWeek of 26 October→Monthly roundupOctober 2026→