Big round · 1 October 2026

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Armadin raises $256M Series B led by Andreessen Horowitz

By Millionrounds ResearchPublished 2 October 2026Updated 3 November 2026

Armadin, based in United States, has raised $256M in a Series B led by Andreessen Horowitz and Accel, announced on 1 October 2026. 8 other investors joined. It is the 201st largest equity round we recorded in the twelve months to that date, and the 27th largest Series B of 395. The median Series B over the same period was $50M, so this one is 5.1 times that. Its previous round on record was a seed round of $190M in March 2026, 7 months earlier.

Raised$256M4 sources reported it
StageSeries B1 earlier round on record
Investors102 named as lead
Where USUnited States

AICybersecurity

How big is it?

Against every equity round we recorded in the twelve months to 1 October 2026. Ranks count companies, so the same raise reported twice is counted once.

#201equity round of the last twelve months
#27Series B of 395 in that time
#137round in United States, of 1,135
This round$256M
Median Series B$50M

5.1 times the median Series B of the last twelve months.

Who invested

Also in the round

Funding history

  1. October 2026Series B$256M
  2. March 2026Seed$190M

$446M raised across the 2 rounds we hold.

Reported by

  1. Firms' own news pages
  2. Leap Ventures1 October
  3. TechStartups1 October
  4. startupi.com.br3 November

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

Other big rounds that week

Simple Energy$180M Series CEliseAI$350M GrowthJeeves$110M Series CInstinct$1.0B Series CQuartermaster$140M Series B
The companyArmadin on Millionrounds→Weekly roundupWeek of 28 September→Monthly roundupOctober 2026→