Logos Capital is a San Francisco–based investment firm dedicated to advancing healthcare through disciplined, data-driven investments in biotechnology. Founded in 2019 by Arsani William, the firm combines in-house data analytics with scientific and clinical expertise to identify transformative therapies across public and private markets.
57% of their portfolio is in Biotech & Life Sciences. Average disclosed round size is $110.2M (across 129 rounds with reported amounts).
Portfolio
113
Fund Size
—
Top Stage
Series B
Last 12 Mo
7
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
138 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 Adcendo ApS | Series C | $75M | Apr 2026 |
 Pinnacle Medicines | Series B | $89M | Mar 2026 |
 Longeveron | Unknown | $15M | Mar 2026 |
 Third Arc Bio | Series A | $52M | Feb 2026 |
 Mirador | Series B | $250M | Jan 2026 |
 Mirador Tx | Series B | $250M | Jan 2026 |
 Aviceda | Series C | — | Jan 2026 |
 Serapha Bio | Series A | $138M | Jan 2026 |
| AAngitia Bio | Series D | $130M | Jan 2026 |
 Artiva Biotherapeutics | Series B | $120M | Jan 2026 |
 OnKure Therapeutics | Series C | $150M | Jan 2026 |
| Longeveron | Growth | $30M | Jan 2026 |
| AAvere Therapeutics | Unknown | $320M | Jan 2026 |
 Angitia Biopharmaceuticals | Series D | $130M | Jan 2026 |
| AAviceda Therapeutics | Unknown | $207.5M | Jan 2026 |
 Pathwork | Seed | $3.5M | Sep 2025 |
 Crescent Biopharma | Growth | $200M | Jun 2025 |
 Verdiva Bio | Series A | $410M | Jan 2025 |
| AAviceda Therapeutics | Series C | — | Jan 2025 |
| MMirador Therapeutics | Unknown | $250M | Jan 2025 |
| Mirador Tx | Series B | $250M | Jan 2025 |
| Aviceda | Series C | $210M | Jan 2025 |
 Helicore Biopharma | Series A | $65M | Jan 2025 |
 35 Pharma | Series C | $53M | Nov 2024 |
| Adcendo ApS | Series B | $135M | Nov 2024 |
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Top Co-Investors
Surveyor Capital48 shared
OrbiMed41 shared
RA Capital Management38 shared
Cormorant Asset Management37 shared
Venrock Healthcare Capital Partners28 shared
Wellington Management28 shared
Vivo Capital21 shared
Farallon Capital Management17 shared
venBio16 shared
Foresite Capital15 shared
Casdin Capital15 shared
Marshall Wace15 shared
Perceptive Advisors14 shared
Redmile Group14 shared
T. Rowe Price13 shared
Alexandria Venture Investments13 shared
Samsara BioCapital13 shared
Deep Track Capital12 shared
The Invus Group, LLC12 shared
Bain Capital Life Sciences11 shared
Last updated: 7 October 2026