Castle Island Ventures — 2025 Investments
4 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(Executive Officer, Director)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(Founder)Pramod Kandel(Founder)Simanta Gautam(Founder)John LightTrey Del BonisLiam Eagen
Co-investorsHivemind Ventures, LlcLaunchpad CapitalMirana VenturesResolute VenturesSTILLMARKAsymmetric+3 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 VC1kxPlaceholderSeed Club Ventures
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 GroupStrobe Ventures
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.