Avidity Partners is a Dallas-based investment management firm focused on the healthcare and biotechnology sectors. Founded in 2019, it uses fundamental, bottom-up research to invest in both public and private equities across the healthcare sector globally.
45% of their portfolio is in Biotech & Life Sciences. Deal activity decreased year-over-year (1 deal in the last 12 months vs 2 prior). Average disclosed round size is $136.3M (across 61 rounds with reported amounts).
Portfolio
48
Fund Size
—
Top Stage
Series B
Last 12 Mo
1
Team
MG
Michael Gregory
Managing Partner, Co-Founder
AL
Amy Liu
Managing Director - Biotech VC
HS
Hailey Spencer
Vice President
PC
Peter Chhoy
Biotech Venture Capital
DW
David Witzke
Co-Founder Emeritus
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
64 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Artios | Series D | $115M | Nov 2025 |
 OrganOx | Unknown | $142M | Jan 2025 |
 Sirona Medical | Series C | $42M | Nov 2024 |
 Aktis Oncology | Series B | $175M | Sep 2024 |
 Neurogene | Series B | $115M | Jan 2024 |
 MBrace | Series A | $85M | Nov 2023 |
 MBrace Therapeutics | Series A | $85M | Nov 2023 |
 Aledade | Growth | — | Jun 2023 |
 Octave | Series C | $52M | Jun 2023 |
 Quanta Therapeutics | Series D | $50.7M | May 2023 |
| MBrace Therapeutics | Series B | $85M | Jan 2023 |
| OOctave Health Group Inc. | Series C | $52M | Jan 2023 |
| MBrace | Series B | $85M | Jan 2023 |
 UpStream Healthcare | Series B | $140M | Dec 2022 |
 Upstream | Series B | $140M | Dec 2022 |
 Nested Therapeutics | Series A | $90M | Oct 2022 |
 Innovaccer | Series E | $150M | Dec 2021 |
| Sirona Medical | Series B | $40M | Nov 2021 |
 Elemy | Series B | $219M | Oct 2021 |
 GentiBio | Series A | $157M | Aug 2021 |
 Sonoma Biotherapeutics | Series B | $265M | Aug 2021 |
 Exo Labs | Series C | $220M | Jul 2021 |
| Artios | Series C | $153M | Jul 2021 |
| AArtios Pharma Limited | Series C | $153M | Jul 2021 |
 BioTheryX | Series E | $92M | May 2021 |
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Top Co-Investors
RA Capital Management15 shared
Casdin Capital12 shared
Perceptive Advisors12 shared
Omega Funds10 shared
Venrock10 shared
Sofinnova Partners9 shared
The Invus Group, LLC9 shared
CaaS Capital8 shared
Surveyor Capital8 shared
Viking Global Investors8 shared
Redmile Group8 shared
8VC7 shared
Logos Capital7 shared
Franklin Templeton7 shared
Mubadala Ventures6 shared
RTW Investments, LP6 shared
OrbiMed6 shared
Andera Partners6 shared
Schroders Capital6 shared
Last updated: 7 October 2026