Investor · Boston, MA

Castle Island GP IV, LLC

Open Castle in the network graph →

Filings

16

SEC Form D

Connections

32

co-filers

Capital

—

across filings

Active

Jun 2023

to Mar 2026

Most-connected co-filers (32)

Management Company Castle Island Management, LLC · Boston, MA13 shared Sean C. Judge · Boston, MA9 shared Kenneth E. Chenault · Cambridge, MA7 shared Mark Smyth · OSLO, Q86 shared Orlin Mladenov · Dublin, Ireland6 shared David Whelan · Dublin, Ireland6 shared Traci Hartz · Vancouver, British Columbia, Canada6 shared Erik Syvertsen · Oslo, Q86 shared Ian Stalker · Vancouver, British Columbia, Canada6 shared Tyron Breytenbach · Vancouver, British Columbia, Canada6 shared JJFT Management, LLC · Fort Lauderdale, FL4 shared Richard Ruffer · New York, NY4 shared Grant N. Cellier · Grand Cayman, Cayman Islands4 shared Gabe Graf · Vancouver, British Columbia, Canada4 shared Justin H. Schair · Portland, ME4 shared Hyla Fund Management, LLC · Oakland, CA3 shared Jarrod Pelletier · Boston, MA3 shared Todd C. Bendell · TEMPE, AZ3 shared Amphibian GP, LLC · Tempe, AZ3 shared Chainlink for Amphibian LLC · Oakland, CA3 shared David Langer · Tempe, AZ3 shared James Hodges · Tempe, AZ3 shared Tim A. Bernlohr · Blasdell, NY2 shared Harry T. Hall, Iv · Malvern, PA2 shared

Recent filings (16)

NORSELAB MEANINGFUL IMPACT HIGH YIELDMar 2026 · 3 co-filers Amphibian BTC Alpha Fund, LPNov 2025 · 13 co-filers Castle Island Ventures IV Feeder, L.P.Oct 2025 · 14 co-filers Castle Island Ventures IV Feeder, L.P.Oct 2025 · 14 co-filers Castle Island Ventures IV, L.P.Sep 2025 · 14 co-filers Castle Island Ventures IV, L.P.Sep 2025 · 14 co-filers Amphibian USD Alpha Fund, LPJun 2025 · 14 co-filers Amphibian ETH Alpha Fund, LPJun 2025 · 14 co-filers NORSELAB MEANINGFUL IMPACT HIGH YIELDMar 2025 · 11 co-filers NORSELAB REAL ESTATE CREDIT OPPORTUNITIESMar 2025 · 11 co-filers NORSELAB MEANINGFUL IMPACT HIGH YIELDMar 2024 · 11 co-filers NORSELAB REAL ESTATE CREDIT OPPORTUNITIESMar 2024 · 11 co-filers Clearlake Capital Partners VIII Private Investors Offshore, L.P.Dec 2023 · 5 co-filers Clearlake Capital Partners VIII Private Investors, LLCDec 2023 · 5 co-filers NORSELAB MEANINGFUL EQUITY IIJun 2023 · 11 co-filers NORSELAB MEANINGFUL STRUCTURED EQUITY IJun 2023 · 11 co-filers Industry Ventures X Private Investors, LLCJun 2023 · 5 co-filers Industry Ventures X Private Investors Offshore, L.P.Jun 2023 · 5 co-filers

Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Castle in the interactive graph →