/

Investors / United States / Colosseum / Co-investors

Colosseum co-investors

Who invests alongside Colosseum · Accelerator · San Francisco, CA, United States

Colosseum shares at least one checked portfolio company with 26 other investors. It backs companies most often with Marin Ventures (2), Variant (2) and Big Brain Holdings (1), and 36% of its 39 checked companies have another investor VCinfo tracks.

26co-investors
14companies backed with another investorof 39 checked
36%of its portfolio is co-backed
Marin Venturesmost frequent co-investor2 shared companies

Co-investor network

the 14 firms it shares most with, and the companies they back together
14 shared companies5 shared companies4 shared companies4 shared companies3 shared companies3 shared companies3 shared companies3 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companiesMarin Ventures: 2 shared companiesMarin Ventures2Variant: 2 shared companiesVariant2Big Brain Holdings: 1 shared companiesBig Brain Holdings1Borderless Capital: 1 shared companiesBorderless Capital1DCG: 1 shared companiesDCG1Eka Ventures: 1 shared companiesEka Ventures1Equilibrium Ventures: 1 shared companiesEquilibrium Ventures1Escape Velocity: 1 shared companiesEscape Velocity1Felicis: 1 shared companiesFelicis1General Catalyst: 1 shared companiesGeneral Catalyst1Golden Ventures: 1 shared companiesGolden Ventures1Lemniscap: 1 shared companiesLemniscap1NewTribe Capital: 1 shared companiesNewTribe Capital1P2 Ventures: 1 shared companiesP2 Ventures1
Shared portfolio companies with ColosseumFirms that also back companies together

Circle size is the number of companies shared with Colosseum; a line joins two co-investors that back at least two companies together.

All co-investors

ranked by shared portfolio companies
#InvestorSharedCompanies both back
1Marin VenturesVenture capital2Compare · Its co-investors
2VariantVenture capital · United States2Compare · Its co-investors
3Big Brain HoldingsVenture capital · United States1Compare · Its co-investors
4Borderless CapitalVenture capital · United States1Compare · Its co-investors
5DCGVenture capital · United States1Compare · Its co-investors
6Eka VenturesVenture capital1Compare · Its co-investors
7Equilibrium VenturesVenture capital · Finland1Compare · Its co-investors
8Escape VelocityVenture capital1Compare · Its co-investors
9FelicisVenture capital · United States1Compare · Its co-investors
10General CatalystVenture capital · United States1Compare · Its co-investors
11Golden VenturesVenture capital · Canada1Compare · Its co-investors
12LemniscapVenture capital1Compare · Its co-investors
13NewTribe CapitalVenture capital · United Arab Emirates1Compare · Its co-investors
14P2 VenturesVenture capital · Spain1Compare · Its co-investors
15ParadigmVenture capital · United States1Compare · Its co-investors
16Press Start CapitalVenture capital1Compare · Its co-investors
17Presto VenturesVenture capital · Czech Republic1Compare · Its co-investors
18Rabo InvestmentsCorporate VC · Netherlands1Compare · Its co-investors
19Redrice VenturesVenture capital · United Kingdom1Compare · Its co-investors
20rpvVenture capital1Compare · Its co-investors
21Sierra VenturesVenture capital · United States1Compare · Its co-investors
22Social Graph VenturesVenture capital1Compare · Its co-investors
23Solana VenturesCorporate VC · United States1Compare · Its co-investors
24StripesVenture capital · United States1Compare · Its co-investors
25Vinyl CapitalVenture capital · United States1Compare · Its co-investors
26Y CombinatorAccelerator · United States1Compare · Its co-investors
Take this list with you. GET /v1/firms/colosseum.com/coinvestors returns the ranked list as JSON for a CRM, a sheet or an AI agent: 25 firms a call on the free plan, 100 on Pro.
Get free API keyAPI docs

A co-investor is a firm whose own portfolio page lists a company that Colosseum's page lists too, both checked against the company's site. It shows who backs the same companies, not who joined the same round. How the data is graded

Free account · no card

Get Colosseum's co-investors as data

Pull this ranked list, Colosseum's portfolio and any firm's profile through one API key or MCP, compare portfolios side by side, and get an email when Colosseum adds a company.

Work email, sign-in link by email. Already have an account? Log in
  • Ask AI5 plain-English investor searches a day
  • Full listsEvery portfolio row and two-firm overlap
  • API and MCP100 REST or MCP calls a month, one key
  • AlertsFollow 5 investors for portfolio and fund changes
VCinfo API
$ curl -H "X-API-Key: YOUR_KEY" \
  https://api.vcinfo.io/v1/firms/colosseum.com/coinvestors

# also
GET /v1/firms/colosseum.com
GET /v1/firms/colosseum.com/portfolio
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing