Castle Island Ventures
VC firm · Boston, MA
Verified active in the last 12 monthsSEC-registered adviser
Venture firm based in Boston, MA. Partners sit on the boards of 4 startups that raised recently.
“Castle Island Ventures is a venture capital firm investing in public blockchain startups. Explore our mission and portfolio.” (from the firm’s website)
- Stages
- Seed, Series A
- Typical check (est.)
- $1.68M–$5.05M
- Latest fund
- Undisclosed · Oct 2025
- Last verified activity
- Nov 2025
Focus
FintechB2B SoftwareHealthcareRecent portfolio activity
Funds and vehicles on SEC file
Sources
- SEC Form D: Castle Island Ventures IV Feeder, L.P.Oct 30, 2025
- SEC Form D: Castle Island Ventures IV, L.P.Sep 29, 2025
- SEC adviser record: Castle Island VenturesMar 31, 2026
- Firm websiteOct 12, 2026
Profile last verified Oct 12, 2026. Is this you? Correct or remove this profile.