Ledger.
Investor · Boston, MA

Sean C. Judge

Open Sean in the network graph →
Filings
12
SEC Form D
Connections
46
co-filers
Capital
$8.0M
across filings
Active
Jun 2023
to Nov 2025

Most-connected co-filers (46)

Castle Island GP IV, LLC · Boston, MA9 sharedManagement Company Castle Island Management, LLC · Boston, MA6 sharedKenneth E. Chenault · Cambridge, MA4 sharedMark Smyth · OSLO, Q84 sharedOrlin Mladenov · Dublin, Ireland4 sharedDavid Whelan · Dublin, Ireland4 sharedErik Syvertsen · Oslo, Q84 sharedNicolas Carter · Boston, MA4 sharedTraci Hartz · Vancouver, British Columbia, Canada4 sharedIan Stalker · Vancouver, British Columbia, Canada4 sharedGabe Graf · Vancouver, British Columbia, Canada4 sharedTyron Breytenbach · Vancouver, British Columbia, Canada4 sharedMatt S. Walsh · Boston, MA4 sharedTodd C. Bendell · TEMPE, AZ3 sharedDavid Langer · Tempe, AZ3 sharedJames Hodges · Tempe, AZ3 sharedAlison M. Rose-Slade · London, United Kingdom3 sharedAmphibian GP, LLC · Tempe, AZ3 sharedChainlink for Amphibian LLC · Oakland, CA3 sharedHyla Fund Management, LLC · Oakland, CA3 sharedRhett Bennett · Birmingham, AL2 sharedTim A. Bernlohr · Blasdell, NY2 sharedJonathan Hsu · San Mateo, CA2 sharedBrendan Moore · San Mateo, CA2 shared

Recent filings (12)

Cyclops, Inc.Nov 2025 · 8 co-filers$8.0MCyclops, Inc.Nov 2025 · 8 co-filers$8.0MAmphibian BTC Alpha Fund, LPNov 2025 · 13 co-filersCastle Island Ventures IV Feeder, L.P.Oct 2025 · 14 co-filersCastle Island Ventures IV Feeder, L.P.Oct 2025 · 14 co-filersCastle Island Ventures IV, L.P.Sep 2025 · 14 co-filersCastle Island Ventures IV, L.P.Sep 2025 · 14 co-filersAmphibian USD Alpha Fund, LPJun 2025 · 14 co-filersAmphibian ETH Alpha Fund, LPJun 2025 · 14 co-filersNORSELAB MEANINGFUL IMPACT HIGH YIELDMar 2024 · 11 co-filersNORSELAB REAL ESTATE CREDIT OPPORTUNITIESMar 2024 · 11 co-filersONE OHANA CORP.Nov 2023 · 20 co-filers$450KNORSELAB MEANINGFUL STRUCTURED EQUITY IJun 2023 · 11 co-filersNORSELAB MEANINGFUL EQUITY IIJun 2023 · 11 co-filersONE OHANA CORP.Jun 2023 · 13 co-filers$1K

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