Investor · Skokie, IL
John W. O'Brien, Jr
Open John in the network graph →Filings
32
SEC Form D
Connections
62
co-filers
Capital
$98.0M
across filings
Active
Dec 2015
to Dec 2025
Most-connected co-filers (62)
David G. Wesolowicz · Chicago, IL13 sharedO'Brien Investment Group Llc · Skokie, IL11 sharedO'Brien Investment Group Llc · Skokie, IL11 sharedO'Brien Investment Group Llc · Chicago, IL10 sharedCharles Allen · Burlington, MA9 sharedHau Thai-Tang · Pittsburgh, PA8 sharedGerard Rutigliano · New York, NY8 sharedJoel Peterson · Salt Lake City, UT8 sharedJames E. Griffiths · Vancouver, British Columbia, Canada6 sharedDavid R. Seiler · Madison, WI6 sharedEric Noble · Salt Lake City, UT5 sharedCyber Mentor Management I, L.L.C · BURLINGAME, CA5 sharedKeith J. Moore · Irvine, CA5 sharedEdward G. Sloane, Jr · Madison, WI5 sharedShae Hong · New York, NY5 sharedClint Peterson · Salt Lake City, UT4 sharedMichael G. Stendler · Skokie, IL4 sharedAllen H. Wolff · San Diego, CA3 sharedRobert A. Whitman · Westlake Village, CA3 sharedStefan E. Ramsbott · DENVER, CO3 sharedJordan Maynard · SAN MATEO, CA3 sharedSteven Shoflick · Greenwood Village, CO3 sharedWeston V. Whitman · Westlake Village, CA3 sharedErik H. Hart · San Diego, CA3 shared
Recent filings (32)
O'Brien Investment Group Pecus Digital Assets Fund, LPMar 2026O'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2025 · 2 co-filersO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2025 · 2 co-filersO'Brien Investment Group Pecus Digital Assets Fund, LPMar 2025 · 1 co-filer$5.0MO'Brien Investment Group Pecus Digital Assets Fund, LPMar 2025 · 1 co-filer$5.0MO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2024 · 6 co-filersO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2024 · 6 co-filersO'Brien Investment Group Pecus Digital Assets Fund, LPMar 2024 · 1 co-filer$5.0MO'Brien Investment Group Pecus Digital Assets Fund, LPMar 2024 · 1 co-filer$5.0MPeterson Breeze Coinvest, LLCJan 2024 · 12 co-filersO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2023 · 5 co-filersO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2023 · 5 co-filersPeterson Dura Coinvest, LLCOct 2023 · 12 co-filersPeterson Search Partners I Coinvest I, LLCAug 2023 · 10 co-filersSpringbrook Partners, LLCApr 2023 · 1 co-filer$9.1MSpringbrook Partners, LLCApr 2023 · 1 co-filer$9.1MO'Brien Investment Group Pecus Digital Assets Fund, LPMar 2023 · 5 co-filers$5.0MO'Brien Investment Group Quantitative Global Macro Futures Fund, LPMar 2023 · 7 co-filersSpringbrook Partners, LLCAug 2021 · 1 co-filer$450KSpringbrook Partners, LLCAug 2021 · 1 co-filer$450KO'Brien Investment Group Pecus Digital Assets Fund, LPMay 2021 · 5 co-filers$5.0MO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2020 · 8 co-filersPeterson Search Partners I, LPAug 2020 · 21 co-filersPeterson Breeze Coinvest, LLCJul 2020 · 12 co-filersO'Brien Investment Group Quantitative Global Macro Futures Fund, LPDec 2019 · 8 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See John in the interactive graph →