Fundraising Fox
/People
Sign in

Sean Judge

Investor

General Partner at Castle Island Ventures

Boston, Massachusetts

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

Find your path to Sean

498 people in our graph can introduce you to Sean.

Sign up to see every warm intro you have to Sean

  • Paths you didn't know you had: your email and LinkedIn already hold routes to Sean. We find them
  • 2nd- and 3rd-degree connections: the friend-of-a-friend routes you can't see from your own inbox or LinkedIn
  • Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone

Days of research, done the moment you sign in, with every route ranked by how warm it is.

Sign up with GoogleAlready have an account? Log in

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.

Contact· self-published, not guessed

Invests in

Crypto & Web3CybersecurityData & InfrastructureDeveloper ToolsFintech

Experience

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

Skills & more

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

From Sean's professional profile.

Investments

Board seats

Cyclops

Investor

Arnac Software Ltd.Coin MetricsCyclops.ioHataPYORSendblocksTry Your Best

Sources: SEC Form D filings · curated public sources.

Colleagues at Castle Island Ventures

Andrew Brochu
Controller at Castle Island Ventures
Gretchen McCarey
Chief Financial Officer at Castle Island Ventures
Gus Coldebella
Chief Legal Officer at Castle Island Ventures
Henry Harris
Investor at Castle Island Ventures
Hunter Merghart
Venture Partner at Castle Island Ventures
Jeff Nazzaro
Advisor and Co-founder at Collective Liquidity
Laura Lentz
Executive Assistant at Castle Island Ventures
Matthew Walsh
Founding Partner at Castle Island Ventures

Frequently asked questions

Who is Sean Judge?
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.
Where does Sean Judge work?
Sean Judge is General Partner at Castle Island Ventures.
What does Sean Judge invest in?
Sean Judge invests in Crypto & Web3, Cybersecurity, Data & Infrastructure, Developer Tools, Fintech.
What check size does Sean Judge write?
Sean Judge typically writes checks of $100K – $10M.
What boards does Sean Judge sit on?
Sean Judge holds tracked board seats at Cyclops.
What companies has Sean Judge invested in?
Investments tracked here include Arnac Software Ltd., Coin Metrics, Cyclops.io, Hata, PYOR, Sendblocks, Try Your Best.
Where did Sean Judge go to school?
Sean Judge studied at Vanderbilt University (Bachelor of Arts, Economics); The London School of Economics and Political Science (LSE) (Economics); Boston College High School.

Same school

Shared employers