/
Log inGet free API keyAccount
Menu
InvestorsCompaniesFit CheckerDocsPricingGet free API key

Investors / United States / 4Catalyzer / Co-investors

4Catalyzer co-investors

Who invests alongside 4Catalyzer · Investor · Guilford, CT, United States

4Catalyzer shares at least one checked portfolio company with 9 other investors. It backs companies most often with Foresite Capital (3), Altium Capital (1) and Collaborative Fund (1), and 75% of its 8 checked companies have another investor VCinfo tracks.

4Catalyzer's full profileCompare with Foresite CapitalGET /v1/firms/4catalyzer.com/coinvestors
9co-investors
6companies backed with another investorof 8 checked
75%of its portfolio is co-backed
Foresite Capitalmost frequent co-investor3 shared companies

Co-investor network

the 9 firms it shares most with, and the companies they back together
3 shared companies3 shared companiesForesite Capital: 3 shared companiesForesite Capital3Altium Capital: 1 shared companiesAltium Capital1Collaborative Fund: 1 shared companiesCollaborative Fund1Colle Capital: 1 shared companiesColle Capital1Dayli Partners: 1 shared companiesDayli Partners1Dolby Family Ventures: 1 shared companiesDolby Family Ventures1Expa: 1 shared companiesExpa1Good Friends: 1 shared companiesGood Friends1UPMC Enterprises: 1 shared companiesUPMC Enterprises1
Shared portfolio companies with 4CatalyzerFirms that also back companies together

Circle size is the number of companies shared with 4Catalyzer; a line joins two co-investors that back at least two companies together.

All co-investors

ranked by shared portfolio companies
#InvestorSharedCompanies both back
1Foresite CapitalVenture capital · United States3
Quantum-Si IncorporatedDetectidentifeye HEALTH
Compare · Its co-investors
2Altium CapitalVenture capital1
Hyperfine
Compare · Its co-investors
3Collaborative FundVenture capital · United States1
Protein Evolution
Compare · Its co-investors
4Colle CapitalVenture capital · United States1
Hyperfine
Compare · Its co-investors
5Dayli PartnersVenture capital · South Korea1
Hyperfine
Compare · Its co-investors
6Dolby Family VenturesVenture capital · United States1
Hyperfine
Compare · Its co-investors
7ExpaUnited States1
Detect
Compare · Its co-investors
8Good FriendsVenture capital · United States1
Protein Evolution
Compare · Its co-investors
9UPMC EnterprisesCorporate VC · United States1
Butterfly Network
Compare · Its co-investors
Take this list with you. GET /v1/firms/4catalyzer.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 4Catalyzer'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 4Catalyzer's co-investors as data

Pull this ranked list, 4Catalyzer's portfolio and any firm's profile through one API key or MCP, compare portfolios side by side, and get an email when 4Catalyzer adds a company.

Work email, sign-in link by email. Already have an account? Log in
Your API keyRead the docs
  • 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/4catalyzer.com/coinvestors

# also
GET /v1/firms/4catalyzer.com
GET /v1/firms/4catalyzer.com/portfolio
The same data as an MCP server for Claude, Cursor and other AI tools. Set up MCP · Docs · Pricing