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Investors / Foresite Capital / Compare with Third Rock Ventures

Foresite Capital vs Third Rock Ventures

Foresite Capital lists 143 portfolio companies and has joined 17 funding rounds; Third Rock Ventures lists 34 companies and has joined 7 rounds. Foresite Capital comes in most often at Series A (38% of its entries), Third Rock Ventures comes in most often at Growth (43% of its entries). 3 companies are on both portfolios, among them Insitro, mazetx.com and Nurix.

143Portfolio companies34
17Funding rounds joined7
1Rounds led2
10Rounds, last 12 months3
$20M to $100MTypical round it comes in at$100M or more
0%Sites no longer answering0%
Show as a table
Foresite Capital and Third Rock Ventures, head to head
Foresite CapitalThird Rock Ventures
Portfolio companies14334
Funding rounds joined177
Rounds led12
Rounds, last 12 months103
Typical round it comes in at$20M to $100M$100M or more
Sites no longer answering0%0%

Where they come in

share of entries by stage
Pre-seed0%0%
Seed0%0%
Series A38%29%
Series B38%29%
Growth25%43%

Foresite CapitalThird Rock Ventures

Show as a table
Entry stages of Foresite Capital and Third Rock Ventures, share of entries
Foresite CapitalThird Rock Ventures
Pre-seed0%0%
Seed0%0%
Series A38%29%
Series B38%29%
Growth25%43%

Themes

share of checked companies
Healthcare & Biotech96%46%
AI & Machine Learning1%17%
Fintech1%15%
Industrial & Manufacturing0%7%
Consumer0%4%
Real Estate & Construction1%2%

Foresite CapitalThird Rock Ventures

Show as a table
Themes of Foresite Capital and Third Rock Ventures, share of checked companies
Foresite CapitalThird Rock Ventures
Healthcare & Biotech96%46%
AI & Machine Learning1%17%
Fintech1%15%
Industrial & Manufacturing0%7%
Consumer0%4%
Real Estate & Construction1%2%

Companies both back

3

Shared companies are those both firms' own portfolio pages list, each checked against the company's site. The same comparison through the API is POST /v1/overlap, for up to 20 firms. How the data is graded

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Compare Foresite Capital and Third Rock Ventures as data

Pull both portfolios and every co-investor through one API key or MCP, and lay up to 20 firms side by side with POST /v1/overlap. A free account adds Ask AI searches and alerts when either firm adds a company.

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  • 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/foresitecapital.com/portfolio

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