Castle Island Ventures | Activity | F4

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Team Portfolio Raise Champions Essays

F4/Castle Island Ventures/Activity

Castle Island Ventures Activity

Every public signal F4 has attached to this firm, with sources and cross-entity links.

Types

Time range

Milestone

Portfolio company TRM Labs reached unicorn status with $1 billion valuation after $70M Series C.

TRM Labs

TRM Labs Castle Island Ventures

coindesk.comFEB 2026

FEB 2026

Investment

Invested in Erebor Bank, a commercial bank serving the innovation economy.

Erebor Bank

Erebor BankCastle Island Ventures

morningstar.comFEB 2026

FEB 2026

Exit

Portfolio company Fordefi was acquired by Paxos for over $100M to expand institutional custody services.

Fordefi

Fordefi Castle Island Ventures

paxos.comNOV 25, 2025

NOV 25, 2025

Exit

Portfolio company Coin Metrics was acquired by Talos for over $100M.

Coin Metrics

Coin Metrics Castle Island Ventures

prnewswire.comJUL 16, 2025

JUL 16, 2025

Essay

Published a whitepaper on stablecoin payments infrastructure.

Stablecoin Payments from the Ground Up

Castle Island Ventures

castleisland.vcJUN 2, 2025

JUN 2, 2025