Investor · Chicago, IL

Michael J. Mangan

Open Michael in the network graph →

Filings

34

SEC Form D

Connections

116

co-filers

Capital

$161.4M

across filings

Active

Dec 2009

to Feb 2021

Most-connected co-filers (116)

Jeremie Miller · Reno, NV20 shared Vanessa Liu · New York, NY15 shared Herrick Lau · Vancouver, British Columbia, Canada15 shared Robert M. Levy · Chicago, IL12 shared Eric Jennings · Reno, NV10 shared K. C. Thomas · Atlanta, GA9 shared Jonathan D. Rodbell · Atlanta, GA9 shared Brian C. Power · VACAVILLE, CA9 shared Ronald W. Lennox · Gaithersburg, MD9 shared C. Eric G. Winzer · Gaithersburg, MD9 shared Bijan M. Salehizadeh · ARLINGTON, VA9 shared Corey Mulloy · Redwood City, CA9 shared John C. Power · VACAVILLE, CA9 shared John N. Desmond · Chicago, IL8 shared Michael Neary · Dallas, TX8 shared Peter M. Cheney · Lowell, MA7 shared Stuart Plank · Washington, Washington, D.C.7 shared Philip Taken · Dallas, TX6 shared Andrew Russell · New York, NY6 shared Allen C. Benello · San Francisco, CA6 shared Doug Engmann · San Francisco, CA6 shared Joseph A. Mcgraw · Wayland, MA6 shared Robert E. Robotti · New York, NY6 shared Lawrence E. Gibson · Richmond, VA6 shared

Recent filings (34)

Manticore BMS Fund LtdDec 2025 · 14 co-filers Manticore BMS Fund LtdOct 2025 · 14 co-filers OPGEN INCFeb 2021 · 23 co-filers$25.0M OPGEN INCDec 2020 · 23 co-filers$10.0M OPGEN INCAug 2018 · 13 co-filers$286K VITUS ENERGY LLCMay 2018 · 5 co-filers$10.0M OPGEN INCSep 2017 · 13 co-filers$110K OPGEN INCJun 2017 · 20 co-filers$1.5M OPGEN INCMay 2016 · 27 co-filers$10.4M Harris Series, a series of Gresham Direct Access Manager Program, L.L.C.May 2016 · 13 co-filers VITUS ENERGY LLCFeb 2016 · 5 co-filers$10.0M OPGEN INCJul 2015 · 26 co-filers$2.6M Harris Series, a series of Gresham Direct Access Manager Program, L.L.C.May 2015 · 13 co-filers VITUS ENERGY LLCFeb 2015 · 5 co-filers$10.0M OPGEN INCFeb 2015 · 20 co-filers$1.5M OPGEN INCJul 2014 · 14 co-filers$1.5M OPGEN INCApr 2014 · 12 co-filers$4.0M OPGEN INCDec 2013 · 12 co-filers$2.0M VITUS MARINE LLCMay 2013 · 3 co-filers$10.0M OPGEN INCMar 2012 · 15 co-filers$17.0M OPGEN INCFeb 2012 · 13 co-filers$3.7M OPGEN INCDec 2011 · 13 co-filers$2.3M Harris Associates Global Large Cap LPMar 2011 · 22 co-filers$500.0M HARRIS ASSOCIATES INTERNATIONAL VALUE LPMar 2011 · 22 co-filers$1.3B OPGEN INCFeb 2011 · 13 co-filers$15.7M

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