/

Investors / United States / 43North / Co-investors

43North co-investors

Who invests alongside 43North · Accelerator · Buffalo, NY, United States

43North shares at least one checked portfolio company with 15 other investors. It backs companies most often with 645 Ventures (1), Akkadian Ventures (1) and AltaIR Capital (1), and 100% of its 4 checked companies have another investor VCinfo tracks.

15co-investors
4companies backed with another investorof 4 checked
100%of its portfolio is co-backed
645 Venturesmost frequent co-investor1 shared company

Co-investor network

the 14 firms it shares most with, and the companies they back together
13 shared companies6 shared companies5 shared companies4 shared companies4 shared companies4 shared companies3 shared companies3 shared companies3 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies2 shared companies645 Ventures: 1 shared companies645 Ventures1Akkadian Ventures: 1 shared companiesAkkadian Ventures1AltaIR Capital: 1 shared companiesAltaIR Capital1Armory Square Ventures: 1 shared companiesArmory Square Ventures1Aurum Partners VC: 1 shared companiesAurum Partners VC1Bain Capital Ventures: 1 shared companiesBain Capital Ventures1Bessemer Venture Partners: 1 shared companiesBessemer Venture Part…1CRV: 1 shared companiesCRV1Debut Capital: 1 shared companiesDebut Capital1Dorm Room Fund: 1 shared companiesDorm Room Fund1Launch NY: 1 shared companiesLaunch NY1NOEMIS Ventures: 1 shared companiesNOEMIS Ventures1Open Opportunity Fund: 1 shared companiesOpen Opportunity Fund1Trinity Ventures: 1 shared companiesTrinity Ventures1
Shared portfolio companies with 43NorthFirms that also back companies together

Circle size is the number of companies shared with 43North; a line joins two co-investors that back at least two companies together.

All co-investors

ranked by shared portfolio companies
Take this list with you. GET /v1/firms/43north.org/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 43North'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 43North's co-investors as data

Pull this ranked list, 43North's portfolio and any firm's profile through one API key or MCP, compare portfolios side by side, and get an email when 43North 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/43north.org/coinvestors

# also
GET /v1/firms/43north.org
GET /v1/firms/43north.org/portfolio
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing