Crypto-invest:~$
Castle Island Ventures

Castle Island Ventures

8
Rounds
$95M
Invested

Castle Island Ventures is a thesis-driven VC focused on public blockchain infrastructure and the companies building on top of it. The fund targets early-stage deals, backing founders working on financial services, compliance tools, data infrastructure, and enterprise adoption of crypto rails. Known for a research-heavy approach, the team publishes substantive analysis on crypto market structure that practitioners actually read.

Portfolio

ProjectCategoryRoundAmountDateInvestors
BBirdai LabsInfrastructureSeedUndisclosedJul 28, 2026Castle Island VenturesCastle Island VenturesMetalayer VenturesMetalayer Venturesthe Venture Deptthe Venture Dept
CyclopsCyclopsPaymentsSeries A$20MJul 15, 2026NNana VenturesCoinbase VenturesCoinbase VenturesCircle VenturesCircle Ventures+3 more
VValinorBankingSeed$25MMar 30, 2026Castle Island VenturesCastle Island VenturesSSIG DT InvestmentsMMaven 11
XXFXBankingSeries A$17MMar 26, 2026Castle Island VenturesCastle Island VenturesCoinbase VenturesCoinbase VenturesHaun VenturesHaun Ventures
CyclopsCyclopsPaymentsStrategic$8.0MMar 4, 2026Castle Island VenturesCastle Island VenturesFF PrimeSShift4
Birch HillBirch HillFinancePre-seed$2.5MFeb 11, 2026Ramin KamfarRamin KamfarenzoenzoEscape VelocityEscape Velocity+11 more
BBirch Hill HoldingsRWAPre-Seed$2.5MFeb 11, 2026ParaFi CapitalParaFi CapitalCastle Island VenturesCastle Island VenturesNascentNascent+6 more
PProject ElevenInfrastructureSeries A$20MJan 14, 2026Castle Island VenturesCastle Island VenturesCoinbase VenturesCoinbase VenturesLLattice Fund+4 more
Castle Island Ventures portfolio and investments | Crypto-invest