Castle Island Ventures — 2025 Investments
10 investments dated 2025 · listed companies and verified rows first · show all
Surus is a financial infrastructure platform offering qualified custody, reserve management, and token issuance for digital asset builders, backed by its own North Carolina-chartered trust company.
Crypto & Web3Data & InfrastructureFintechWashington, US
Bradley Gibson(Chief Technology Officer)inBethany Wheeler(Chief Trust Officer)inJennifer Hoopes(Chief Legal Officer)inRachel Trujillo(Chief Compliance Officer)inPatrick Murck(Founder & CEO)in
Board seatNic Carter· per SEC Form D · $10.6M raise · filed Mar 2025
Co-investorsFinancial Venture StudioProtagonistRestive Ventures
Alpen Labs builds a Bitcoin layer-2 network that enables financial applications through a ZK rollup with optimistic bridge architecture.
Crypto & Web3FintechNew York City, US
Abishkar Chhetri(Chief Operating Officer)inPramod Kandel(Chief Technology Officer)inSimanta Gautam(Chief Executive Officer)inChandan Sharma Subedi(Co-Founder)inJohn LightinTrey Del Bonis
Co-investorsAccelmed PartnersAsymmetricHivemind Ventures, LlcLaunchpad CapitalMirana VenturesResolute Ventures+8 more
Arx develops secure chips that embed blockchain authentication into physical items like apparel, collectibles, and certificates, enabling decentralized provenance verification and digital experiences without centralized servers.
Crypto & Web3Deep TechHardware
Co-investorsInflection.xyzPlaceholder VC1kxSeed Club Ventures
ARxVision makes a wearable AI headset and accessories designed to assist blind and low-vision users by describing their surroundings, reading documents, and providing hands-free audio interaction.
AI & Machine LearningHardwareHealthtech
Co-investors5Lion Ventures1kxPlaceholder VCSeed Club Ventures
Felix is a remittance service that enables users to send money from the United States to Latin America (Mexico, Guatemala, Honduras, El Salvador, and Dominican Republic) via WhatsApp, with funds delivered to bank accounts, mobile wallets, or cash pickup locations.
B2B MarketplacesFintechSan Francisco, US
Bernardo Garcia(Founder)inJuan Llanos(Executive Officer)in
BoardManuel Godoy(Founder)inSean Judge(Director)inPaul Arnold(Director)inAna Cristina Gadala-Maria(Director)in
Co-investorsContour Venture PartnersDorm RoomGeneral CatalystHTwentyMONASHEESQED Investors+9 more
W. Aaron Daniel(Founder)inDave Schwab(Founder)in
Co-investorsDraper AssociatesDraper Dragon
Tesser provides stablecoin payment infrastructure for financial institutions, including global stablecoin settlement, off-ramp-as-a-service, and stablecoin payment capabilities with wallet infrastructure, on/off ramps, and compliance tools.
Crypto & Web3Enterprise SoftwareFintechNew York City, US
Geetha Panchapakesan(Founder)in
Co-investorsDigital Currency GroupAnthemis VentureStrobe Ventures
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
L2Pear ProtocolRockSolid Network
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.







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