Investor · San Francisco, CA
Sean Hagberg
Open Sean in the network graph →Filings
27
SEC Form D
Connections
80
co-filers
Capital
$3.1M
across filings
Active
Apr 2014
to Feb 2026
Most-connected co-filers (80)
Stephen Juelsgaard · San Francisco, CA24 sharedBlake Gurfein · San Francisco, CA21 sharedSteven Gluckstern · SANTA FE, NM18 sharedTimothy L. Haugen · Fargo, ND12 sharedJay D. Kesslen · NEW YORK, NY11 sharedKenneth P. Regan · Fargo, ND11 sharedSteven Bregman · NEW YORK, NY11 sharedPeter D. Doyle · NEW YORK, NY11 sharedMurray D. Stahl · New York, NY11 sharedThomas Ewing · CHARLOTTE, NC11 sharedLance R. Wolf · Fargo, ND11 sharedJohn Collett · Charlotte, NC10 sharedL. J. Wilkerson · Santa Fe, NM9 sharedTimothy A. Hunt · Fargo, ND8 sharedHousing Authority Of The County Of Kern H. Housing Authority Of The County Of Kern · Bakersfield, CA8 sharedJim Bour, Md · Columbus, OH8 sharedBrian Henry · BELTON, MO6 sharedJoe Uebbing · BELTON, MO6 sharedHugh D. Ross · NEW YORK, NY6 sharedJosh Z. Goldman · Birmingham, AL6 sharedFort Warren Capital Management, Lp · Boston, MA6 sharedRb Nova Mf LLC · Washington, Washington, D.C.5 sharedRam Duriseti · San Francisco, CA5 sharedLawrence Leisure · CHICAGO, IL5 shared
Recent filings (27)
POLESTAR OFFSHORE FUND LTDFeb 2026 · 5 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2025 · 16 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2024 · 19 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2023 · 19 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2022 · 18 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2021 · 18 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2020 · 18 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2019 · 18 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2018 · 18 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2017 · 18 co-filersFORT WARREN OPPORTUNITIES FUND, LPAug 2016 · 12 co-filersFORT WARREN OPPORTUNITIES OFFSHORE FUND, LTD.Aug 2016 · 13 co-filersPOLESTAR OFFSHORE FUND LTDFeb 2016 · 18 co-filersRio Grande Neurosciences, Inc.Feb 2016 · 14 co-filers$969KRio Grande Neurosciences, Inc.Jan 2016 · 14 co-filers$3.7MENDOTRONIX INCDec 2015 · 16 co-filers$3.5MRio Grande Neurosciences, Inc.Oct 2015 · 12 co-filers$2.0MFORT WARREN OPPORTUNITIES OFFSHORE FUND, LTD.Aug 2015 · 13 co-filersFORT WARREN OPPORTUNITIES FUND, LPAug 2015 · 12 co-filersENDOTRONIX INCJul 2015 · 14 co-filers$1.5MRio Grande Neurosciences, Inc.May 2015 · 12 co-filers$8.0MENDOTRONIX INCFeb 2015 · 16 co-filers$2.5MPOLESTAR OFFSHORE FUND LTDFeb 2015 · 23 co-filersENDOTRONIX INCSep 2014 · 8 co-filers$4.0MFORT WARREN OPPORTUNITIES FUND, LPAug 2014 · 7 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Sean in the interactive graph →