Investors / United States / Primer Ventures
Primer Ventures
Venture capital · Palo Alto, CA, United States · North America
Primer Ventures is an investment firm that partners with entrepreneurs in healthcare. It invests in life science tools and therapeutics at early stage and supports companies in bringing products and therapies to market.
Invests inHealthcare & Biotech
In its own wordslife sciencesgenomicstherapeuticssynthetic biologymolecular diagnosticsdrug discovery
Your fit with Primer Ventures
Four questions about your startup
See how your round matches what it backs, point by point.
Or find every investor that fitsPrimer Ventures lists 3 checked portfolio companies on its own site and is named in 2 funding rounds. Its most frequent entry is Series A, 50% of the companies with a known first round. Its largest theme is Healthcare & Biotech (100%). 50% of its companies are based in United States. It invests most often alongside 3B Future Health Fund, ARCH Venture Partners and Axil Capital.
Counts come from funding rounds that name Primer Ventures, complete from mid-2025: earlier rounds appear only when they were reported later. Round amounts and full round histories are on Fundup AI.
Entry stage
share of companies by the stage of its first roundShow as a table
| Value | |
|---|---|
| Pre-seed | 0% |
| Seed | 0% |
| Series A | 50% |
| Series B | 0% |
| Growth | 50% |
Activity by year
rounds it joined, last 10 yearsShow as a table
| Total | Rounds it led | |
|---|---|---|
| '17 | 0 | 0 |
| '18 | 0 | 0 |
| '19 | 0 | 0 |
| '20 | 0 | 0 |
| '21 | 0 | 0 |
| '22 | 0 | 0 |
| '23 | 0 | 0 |
| '24 | 0 | 0 |
| '25 | 0 | 0 |
| '26 | 2 | 0 |
Invests most often with
firms sharing its portfolio companiesShow as a table
| Share | |
|---|---|
| 3B Future Health Fund | 1 |
| ARCH Venture Partners | 1 |
| Axil Capital | 1 |
| F-Prime Capital | 1 |
| LG Technology Ventures | 1 |
| Medicxi | 1 |
| Novartis Venture Fund | 1 |
| Pontifax | 1 |
Its portfolio companies
where they are based, and what their own sites showSite status
- Site answers267%
- No longer answers00%
- Points to another company133%
- Parked or sold domain00%
A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.
Investment themes
share of its checked companiesThis firmAll checked companies
Show as a table
| This firm | All checked companies | |
|---|---|---|
| Healthcare & Biotech | 100% | 15% |
Co-investor network
who it backs companies with, and who they back togetherAll co-investors or Compare portfolios with 3B Future Health Fund
Compare Primer Ventures head to head
portfolio size, rounds, entry stages, themes and the companies both backThree or more firms at once: portfolio overlap.
Recent portfolio activity
when companies last raised with Primer Ventures| Date | Company | Stage |
|---|---|---|
| 7 Jul 2026 | Series C+ | |
| 28 May 2026 | Series A |
Round details for Primer Ventures
Amounts, full round histories and every co-investor in Primer Ventures' rounds are on Fundup AI. VCinfo covers investors and their portfolios.
Portfolio
3 companies checked against their own sites| Company | What it does | Themes | First round with it | Evidence |
|---|---|---|---|---|
| The company develops and provides molecular testing products and services for clinical applications, including hematologic malignancy testing and cell and gene therapy. | Healthcare & Biotech | May 2026Series A | Funding round | |
Healthcare & Biotech | Portfolio page | |||
| Fore Biotherapeutics develops targeted therapies for treating cancers. | Healthcare & Biotech | Jul 2026Series C+ | Page + round |
About this data
site last read 5 Nov 2026- Site
- primerventures.com
- Last read
- 5 Nov 2026
- Watching since
- 5 Nov 2026
- Rounds since
- 28 May 2026
- Companies checked
- 3
Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.
Get Primer Ventures' profile as data
Pull Primer Ventures' portfolio, co-investors and changes through one API key or MCP, open every portfolio row, compare it with other firms, and get an email when it adds a company or files a fund.
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
$ curl -H "X-API-Key: YOUR_KEY" \
https://api.vcinfo.io/v1/firms/primerventures.com
# also
GET /v1/firms/primerventures.com/portfolio
GET /v1/firms/primerventures.com/coinvestors
GET /v1/firms/primerventures.com/news