France · 
Who invested in Capital B?
Capital B's investors include Adam Back, Maxim Group, Blockstream Capital Partners, Tobam and Marex. Maxim Group led its latest round.
2026
$2.6MRound$18MRoundFrance · Funded startup
Who invested in Capital B
2 rounds we have observed, with the 5 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 5 months ago
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Funding summaryUpdated 5 Nov 2026
$20Mraised across 2 rounds since 2025, from 2 sources
$2.6MRound$18MRound
- Latest round
- Round, $18MMay 2026
- Led by
- Maxim Group
- Step-upi
- 6.9×
- Investors
- 5 (2 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
- Round, $2.6M Aug 2025
- Biggest round
- $18M Round · May 2026
- Between rounds
- 9 months from the last two
The rounds
- May 2026Round$18M4 new1 returning
Reported by Ventureburn
- Aug 2025
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
MarexInvestment firm1round
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Quick answers about Capital B
How much has Capital B raised?
Capital B has raised $20M across 2 rounds since 2025.
When did Capital B last raise?
Capital B's most recent round was an Undisclosed round of $18M in May 2026, led by Maxim Group.
What was Capital B's biggest round?
Its most recent round, $18M in May 2026, is also its largest on record.
Who backed Capital B first?
Capital B's first round on record, in Aug 2025, was backed by Adam Back.
What stage is Capital B at?
Capital B's latest named round is an Undisclosed round, in May 2026.
Where is Capital B based?
Capital B is based in France.
Who led Capital B's rounds?
Adam Back led the Undisclosed round in 2025; Maxim Group led the Undisclosed round in 2026.
Companies like Capital B
In the same sector, and raised in the last eighteen months.
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