United States · 
Who invested in Quartermaster?
Quartermaster's investors include First Round Capital, Quiet Capital, BoxGroup, Operator Partners and Steel Atlas, and 6 more on record. Insight Partners led its latest round.
2027
$43MSeries A$140MSeries B
United States · Series B startup
Who invested in Quartermaster
2 rounds we have observed, with the 11 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 1 month ago
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Funding summaryUpdated 5 Nov 2026
$183Mraised across 2 rounds since 2026, from 5 sources
$43MSeries A$140MSeries B
- Latest round
- Series B, $140MSept 2026
- Led by
- Insight Partners
- Step-upi
- 3.3×
- Investors
- 11 (3 led)
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $43M May 2026
- Biggest round
- $140M Series B · Sept 2026
- Between rounds
- 4 months from the last two
The rounds
- Sept 2026Series B$140M3 new6 returning
Insight PartnersLead
First Round Capital
BoxGroup
Quiet Capital
Operator Partners
Overmatch Ventures
Steel Atlas
TMV Logistics- Stifel
Reported by Tech Funding News and 2 othersSEC filing: $49M sold
- May 2026Series A$43M8 new
- First Round CapitalLead
- Quiet CapitalLead
- BoxGroup
- Operator Partners
- David Adelman
- Steel Atlas
- TMV Logistics
Shorewind Capital
Reported by TechCrunch and 1 otherSEC filing: $49M sold
Founders and team
From Quartermaster's own website: 3 on the team.
- Neil SobinCEO
- Matt BeckCOO
- Steve RibaudoCOO
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
David AdelmanAngel1round
StifelGrowth equity1round
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list Quartermaster as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Quartermaster
How much has Quartermaster raised?
Quartermaster has raised $183M across 2 rounds since 2026.
When did Quartermaster last raise?
Quartermaster's most recent round was a Series B of $140M in Sept 2026, led by Insight Partners.
What was Quartermaster's biggest round?
Its most recent round, $140M in Sept 2026, is also its largest on record.
Who backed Quartermaster first?
Quartermaster's first round on record, in May 2026, was backed by First Round Capital, Quiet Capital and BoxGroup and 5 others.
What stage is Quartermaster at?
Quartermaster's latest named round is a Series B, in Sept 2026.
Where is Quartermaster based?
Quartermaster is based in the United States.
Who led Quartermaster's rounds?
First Round Capital led the Series A in 2026; Insight Partners led the Series B in 2026.
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