Typical seed round size for biotech startups in San Diego
Based on 19 Form D filings by San Diego biotech issuers at seed stage, filed Oct 2024 – Sep 2026. Updated monthly. Change any segment to compare.
The numbers
- Median seed raise: $1.9M
- Middle half of rounds: $868k – $3.1M
- Filings in sample: 19
- Rounds under $1M: 26%
- Rounds over $5M: 5%
- Updated Sep 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 · Bay Area ($3.8M)