Fundraising Fox

Sean Judge

Investor

General Partner at Castle Island Ventures

Boston, Massachusetts

Writes $100K – $10M checks Β· typically $1M

About

Sean Judge is a former tech investor and investment banker who applies deep mainstream finance expertise to financial-market infrastructure, consumer fintech, public-blockchain use cases, and U.S. crypto-regulation analysis.

Invests in

Crypto & Web3CybersecurityData & InfrastructureDeveloper ToolsFintech

Experience

  1. Castle Island VenturesGeneral Partnercurrent2021 β€” presentBoston, Massachusetts, United States
  2. XFXBoard Membercurrent2025 β€” present
  3. ValinorBoard Membercurrent2025 β€” present
  4. CyclopsBoard Membercurrent2025 β€” present
  5. FΓ©lixBoard Membercurrent2024 β€” present
  6. ArchBoard Observercurrent2022 β€” present
  7. Eaglebrook AdvisorsBoard Membercurrent2021 β€” present
  8. PYORBoard Observercurrent2022 β€” present
  9. Try Your BestBoard Member2021 β€” 2026
  10. BeamBoard Member2025
  11. Coin MetricsBoard Member2018 β€” 2021
  12. Unchained CapitalInvestor2021Boston, Massachusetts, United States
  13. JerryInvestor2021
  14. Highland Capital PartnersPrincipal2016 β€” 2021
  15. Pomona CapitalSenior Associate2014 β€” 2016Hong Kong / New York
  16. Bank of America Merrill LynchInvestment Banking Analyst2011 β€” 2014New York, United States
  17. Bank of America Merrill LynchLeveraged Finance Analyst2010

Education

  1. Vanderbilt UniversityBachelor of Arts, Economics2007 β€” 2011
  2. The London School of Economics and Political Science (LSE)Economics2009
  3. Boston College High School2003 β€” 2007

Skills & more

Bloomberg4PowerPoint3Microsoft Excel1Credit Analysis2Valuation6Economics1Investment Banking3Capital Markets1Corporate Finance2Financial Modeling5Finance5Due Diligence4
+4 morePrivate EquityEquity ResearchFinancial AnalysisInvestments

From Sean's professional profile.

Same school

Shared employers

Deals Β· 1

Cyclops, Inc.Board seat

via Castle Island Ventures Β· filed Jul 2026 Β· $20M raise

Attribution from SEC filings, press coverage, and firm rosters.

Colleagues at Castle Island Ventures