Big round · 8 October 2026

Oratomic raises $475M Series B led by General Catalyst

By Millionrounds ResearchPublished 9 October 2026Updated 12 October 2026

Oratomic, based in United States, has raised $475M in a Series B led by General Catalyst, Khosla Ventures and Index Ventures, announced on 8 October 2026. It is the 120th largest equity round we recorded in the twelve months to that date, and the 11th largest Series B of 405. The median Series B over the same period was $50M, so this one is 9.5 times that. Its previous round on record was a Series A of $300M in July 2026, 3 months earlier.

Raised$475M2 sources reported it
StageSeries B1 earlier round on record
Investors66 named as lead
Where USUnited States

Quantum Computing

How big is it?

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

#120equity round of the last twelve months
#11Series B of 405 in that time
#84round in United States, of 1,161
This round$475M
Median Series B$50M

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

Who invested

Funding history

  1. October 2026Series B$475M
  2. July 2026Series A$300M

$775M raised across the 2 rounds we hold.

Reported by

  1. Silicon Angle8 October
  2. AlleyWatch12 October

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

Other big rounds that week

TypeSafe AI$870M Series AOxide$445M Series DVEIR$110M Series CDeepSeek$15B Series BMManus / Butterfly Effect$500M GrowthArena$200M Series B
The companyOratomic on Millionrounds→Weekly roundupWeek of 5 October→Monthly roundupOctober 2026→