# Andreessen Horowitz Bio + Health

Source: https://onco.cc/companies/a16z-bio-health/  
OnCo record `a16z-bio-health` (Company). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

The life sciences and healthcare arm of the Silicon Valley venture firm Andreessen Horowitz (a16z). It backs founders who mix biology, software and care delivery, including a small number of cancer drug and diagnostics start-ups.

## Summary

Andreessen Horowitz was founded in 2009 in Menlo Park by Marc Andreessen and Ben Horowitz (Wikipedia). Its Bio + Health team describes itself as partnering with founders 'redefining the frontiers of medicine and healthcare', from life sciences to care delivery, with a team that combines former founders and operators with MDs, PhDs and technologists. The practice invests from seed to growth and is best known for computational biology and health-system software rather than classic biotech company creation. Oncology appears through precision medicine bets: the Bio + Health page lists IDRx (targeted therapies for gastrointestinal stromal tumours) and Cartography Biosciences (tumour-specific antigen discovery for cancer immunotherapy), alongside AI drug discovery firms such as Genesis and insitro.

## Fields

- Kind: Company
- Last checked: 2026-09-10
- Tags: vc
- HQ: Menlo Park, CA
- Type: investor
- Website: https://a16z.com/bio-health/

## Notes

- Founded year is for the parent firm (Wikipedia). The a16z portfolio page is rendered client-side; oncology names were taken from the Bio + Health landing page.

## Sources

- Official website: https://a16z.com/bio-health/
- Portfolio: https://a16z.com/portfolio/
- Wikipedia: https://en.wikipedia.org/wiki/Andreessen_Horowitz

## Connected records

- companies: [Alpha-9 Oncology](https://onco.cc/companies/alpha-9-oncology/), [Thyme Care](https://onco.cc/companies/thyme-care/), [Valar Labs](https://onco.cc/companies/valar-labs/)

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JSON: https://onco.cc/api/v1/entities/a16z-bio-health.json