Investor profile
Castle Island Ventures
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Castle Island Ventures is a venture capital firm focused exclusively on public blockchains, backing entrepreneurs building the infrastructure and application companies required to help transformative protocols reach their full potential. The firm believes that public blockchains represent a paradigm shift in the way the world interacts with money, financial services, and the internet itself — investing across three core themes: monetary networks (the emergence of a rules-based monetary order powered by crypto-native assets and stablecoins), financial services (the convergence of blockchains with regulated financial markets, enabling new prime brokerage, payments, and compliance infrastructure), and internet architecture (Web3 and decentralized topologies that restore digital property rights and displace centralized data monopolies). Castle Island invests primarily in equity, offering portfolio companies deep connections to the asset management and traditional financial services world.
Notable quotes
“We believe that public blockchains are a transformative technology and will change the way that we interact with money, value transfer, trusted third parties and even the fundamental architecture of the internet itself.”
“We believe that public blockchains represent a paradigm shift in the way we interact with money, financial services, and the internet itself. This new fund gives us the ability to support three big themes that continue to excite us.”
“We have some of the most talented people in the world spending their waking hours trying to improve the human condition and give people the tools to be more independent over their money and digital identities. The real builders in this industry would be building regardless of crypto prices. They are purpose driven.”
Recent investments
| Company | Round | Size | Date |
|---|---|---|---|
| Valinor Digital | Seed | $25m | 2026-02-05 |
| XFX | Series A | $17m | 2026-03-26 |
| Project Eleven | Series A | $20m | 2026-01-15 |
| Hidden Road | Series A | $50m | 2023-01-01 |
| Coin Metrics | Seed | $2m | 2019-01-01 |
| Babylon | Seed | — | 2023-01-01 |
| Mountain Protocol | Seed | — | 2023-01-01 |
| Bitwise Asset Management | Seed | — | 2019-01-01 |
| BlockFi | Seed | — | 2018-01-01 |
| Notabene | Seed | — | 2021-01-01 |
Frequent co-investors
| VC firm | Deals together |
|---|---|
| Coinbase Ventures | 12 |
| Haun Ventures | 6 |
| Digital Currency Group | 4 |
| Multicoin Capital | 4 |
| Variant Fund | 3 |
| CMT Digital | 3 |
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