Investor · Boston, MA
Barbara G. Sosnowski
Open Barbara in the network graph →Filings
13
SEC Form D
Connections
53
co-filers
Capital
$13.0M
across filings
Active
Mar 2023
to Aug 2025
Most-connected co-filers (53)
Frank G. Haluska · Wayland, MA11 sharedNicholas M. Saccomano · Boulder, CO10 sharedOmar G. Khalil · Boston, MA8 sharedAndrew G. Phillips · Boston, MA5 sharedDavid J. Ament · BOSTON, MA3 sharedPeter A. Veldman · Luxembourg, Luxembourg3 sharedAndrew G. Dodson · SAN FRANCISCO, CA3 sharedAlan Ao · Morganville, NJ3 sharedWilliam G. Winterer · BOSTON, MA3 sharedMichail G. Tziaras · Luxembourg, Luxembourg3 sharedCamilo G. Rico · Tempe, AZ3 sharedVilune A. Mackeviciute · Luxembourg, Luxembourg3 sharedDavid Stefanick · San Diego, CA3 sharedChristopher Nero · San Diego, CA3 sharedAlberto D. Gutierrez · LEIDEN, P73 sharedJoshua N. Stone · Luxembourg, Luxembourg3 sharedDale M. Brittliffe · Vancouver, British Columbia, Canada3 sharedMarcus N. Steele · Cardiff, CA3 sharedMarta Garrido Abad · Grand Duchy of Luxembourg, Luxembourg3 sharedNicholas Mcfarland · Seattle, WA3 sharedAimee Hirata · Seattle, WA3 sharedAdam G. Lessler · Tempe, AZ3 sharedJoseph A. Taveira · BOSTON, MA3 sharedWilliam C. Kessinger · SAN FRANCISCO, CA3 shared
Recent filings (13)
Irving Investors Privates HPC XVIII, LLC,Jan 2026 · 4 co-filersBridgeport Access Series LP - NewEdge Uncorrelated Returns Fund IJan 2026 · 4 co-filersIrving Investors Crossover L, LLCAug 2025 · 12 co-filers$2.6MKestrel Therapeutics Inc.Aug 2025 · 17 co-filers$10.0MKestrel Therapeutics Inc.Aug 2025 · 17 co-filers$10.0MBridgeport Access Series LP - NRC Private Equity Opportunities III BP Feeder SeriesMar 2025 · 12 co-filersKestrel Therapeutics Inc.Feb 2025 · 17 co-filers$16.0MKestrel Therapeutics Inc.Feb 2025 · 17 co-filers$16.0MBridgeport Access Series LP - NewEdge Uncorrelated Returns Fund IJan 2025 · 12 co-filersParthenon Capital Executives Fund II, L.P.Apr 2023 · 17 co-filersParthenon Investors VII Parallel, L.P.Mar 2023 · 17 co-filersParthenon Investors VII, L.P.Mar 2023 · 17 co-filersEQT Infrastructure VI Bulldog Side Car (USD) SCSpMar 2023 · 20 co-filersEQT Infrastructure VI Bulldog Side Car Germany (EUR) SCSpMar 2023 · 18 co-filersEQT Infrastructure VI Bulldog Side Car (EUR) SCSpMar 2023 · 20 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Barbara in the interactive graph →