Typical pre-seed round size for biotech startups in Bay Area
Based on 15 Form D filings by Bay Area biotech issuers at pre-seed stage, filed Nov 2024 – Oct 2026. Updated monthly. Change any segment to compare.
The numbers
- Median pre-seed raise: $250k
- Middle half of rounds: $75k – $505k
- Filings in sample: 15
- Rounds under $1M: 87%
- Rounds over $5M: 0%
- Updated Oct 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.