Castle Island Ventures

The company operates as a specialised venture capital manager. It raises committed capital from institutional and accredited limited partners into closed‑end funds that are dedicated to the public‑blockchain and crypto ecosystem. These funds invest primarily at early stages in equity and tokens of companies and networks building monetary, financial‑services and internet infrastructure on public blockchains.

Value is created by sourcing, evaluating and supporting a portfolio of blockchain‑focused startups and token projects, aiming for substantial capital appreciation. Financial value to the firm and its investors is realised through exits such as token liquidity events, secondary sales and company acquisitions or listings. The general partnership earns recurring management fees on committed or invested capital and a share of investment profits (carried interest) above a defined hurdle rate, in line with standard venture capital structures.

Castle Island Ventures is a United States–based venture capital firm founded in 2018 by former Fidelity employees. It focuses exclusively on investments related to public blockchains, including both equity in companies and purchases of crypto tokens. The firm has raised multiple closed‑end funds, including a $50 million second fund and a $250 million third fund targeting web3 and public‑blockchain infrastructure and applications.

The firm’s customers are primarily institutional and accredited limited partners such as endowments, foundations, asset managers, insurers and family offices that commit capital to its funds. It generates returns by deploying this capital into early‑stage blockchain and crypto projects and realising gains on equity and token holdings over time, alongside standard venture capital fund economics of management fees and performance‑based carried interest paid to the general partnership.