Castle Island Ventures
Venture capital firm investing exclusively in public blockchains, backing early-stage infrastructure and application companies at the intersection of crypto and traditional finance.
Boston, United States · 39+ investments · 43 portfolio companies
- Headquarters
- Boston, United States
- Founded
- 2018
- Website
- castleisland.vc
- AUM
- $400.0M
- Portfolio Companies
- 43
- Total Investments
- 39
- Last Investment
- Mar 2026
- Geographic Focus
- Global
Indexed holds 43 portfolio companies and 39 funding rounds for this investor. The full record is or through the API.
Investment Thesis
Castle Island Ventures is a Venture Capital firm based in Boston, United States. It has made 39 investments, including Halborn, Arch Lending and Coala Pay. Focus areas include Crypto & Web3.
Portfolio43
Co-investors24
Sign up to view co-investors
24 co-investors across 83 shared portfolio companies — who they back alongside, and how often they lead.
Venture Capital ×22 · Corporate VC ×2 · 45 shared rounds
Investment History
Sign up to view investment history
Create a free account with 25 free credits every month, no card needed, to unlock deal history, amounts, and round details.
Your firm? Embed this profile
Add the live badge to your site — it stays current as your portfolio data updates.
<a href="https://indexed.vc/investors/castle-island-ventures"><img src="https://indexed.vc/api/badge/investor/castle-island-ventures" alt="Castle Island Ventures on Indexed.vc" width="260" height="76" /></a>