Big round · 28 September 2026

Quartermaster raises $140M Series B led by Insight Partners

By Millionrounds ResearchPublished 29 September 2026

Quartermaster, based in United States, has raised $140M in a Series B, announced on 28 September 2026. 8 other investors joined. It is the 350th largest equity round we recorded in the twelve months to that date, and the 60th largest Series B of 394. The median Series B over the same period was $50M, so this one is 2.8 times that. Its previous round on record was a Series A of $43M in May 2026, 4 months earlier.

Raised$140M2 sources reported it
StageSeries B1 earlier round on record
Investors8no lead named
Where USUnited States

AIDefence TechIoTLogistics

How big is it?

Against every equity round we recorded in the twelve months to 28 September 2026. Ranks count companies, so the same raise reported twice is counted once.

#350equity round of the last twelve months
#60Series B of 394 in that time
#224round in United States, of 1,134
This round$140M
Median Series B$50M

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

Who invested

In the round

Funding history

  1. September 2026Series B$140M
  2. May 2026Series A$43M

$183M raised across the 2 rounds we hold.

Reported by

  1. TechStartups28 September
  2. Tech Funding News29 September

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

Other big rounds that week

AArmadin$256M Series BSimple Energy$180M Series CEliseAI$350M GrowthJeeves$110M Series CInstinct$1.0B Series C
The companyQuartermaster on Millionrounds→Weekly roundupWeek of 28 September→Monthly roundupSeptember 2026→