what's Castle Island Ventures?
Castle Island Ventures is a venture capital firm founded in 2018 that specializes in early-stage investments in blockchain and cryptocurrency companies. The firm focuses on infrastructure, protocols, and applications that advance the adoption of digital assets, decentralized finance, and related technologies. With a team of partners experienced in finance, technology, and policy, it provides capital and strategic support to founders building in the crypto ecosystem. The investment thesis emphasizes long-term innovation in public blockchains, stablecoins, and tools for scalability and security. Castle Island Ventures has backed a diverse portfolio of projects, contributing to the growth of the crypto industry through targeted funding and industry expertise.
New hire @g_co joins Castle Island Ventures.
Links
x.com/castleislandvcCo-led $2.5M pre-seed funding round for Birch Hill alongside ParaFi Capital.
Participates as one of four backing investors in the Nitro Accelerator program, which provides $500k investments to accepted teams on Day 1.
New hire @g_co joins the Castle Island Ventures team.
Publishes Part 2 of Stablecoin Payments Report in collaboration with Dragonfly, covering data through August 2025 with stablecoin payments reaching $10.2B monthly ($122B annual rate).
Erebor, a portfolio company of CIV, receives preliminary conditional approval under OCC for de novo bank charter.
Leads $2.8M Pre-Seed funding round for DeFi project RockSolid HQ.
Major institutional crypto integration accelerates with SEC approving crypto ETP reforms, exchanges filing for generic listing standards, and White House releasing comprehensive digital assets framework.
Strategic shift to become leading stablecoin-focused venture capital firm, showing early success.