Typical seed round size for biotech startups in Bay Area
Based on 31 Form D filings by Bay Area biotech issuers at seed stage, filed Oct 2024 – Jul 2026. Updated monthly. Change any segment to compare.
The numbers
- Median seed raise: $3.8M
- Middle half of rounds: $2.1M – $6.9M
- Filings in sample: 31
- Rounds under $1M: 10%
- Rounds over $5M: 32%
- Updated Jul 2026
Read this number carefully
Form D undercounts small SAFE rounds and rounds that rely on other exemptions. Treat the median as a ceiling for "typical", not a target.
Compare segments
Biotech · Seed · Boston ($4.2M)
Biotech · Seed · San Diego ($1.9M)