Investor · Washington, Washington, D.C.
William C. Sonneborn
Open William in the network graph →Filings
91
SEC Form D
Connections
230
co-filers
Capital
$145.0M
across filings
Active
Apr 2012
to May 2019
Most-connected co-filers (230)
R. B. Thomas · WASHINGTON, Washington, D.C.30 sharedRandall S. Wade · Washington, Washington, D.C.29 sharedRyan Hinkle · New York, NY26 sharedAQR Capital Management II, LLC · Greenwich, CT26 sharedTom Roberts · Richmond, VA26 sharedDolores P. Pavlini · Far Hills, NJ26 sharedEric Wiesen · San Francisco, CA16 sharedJ. T. Hain · CHARLOTTE, NC16 sharedCornacchia I. Joseph · Rio de Janeiro, Guernsey11 sharedKurt A. Talbot · Houston, TX10 sharedTerrance R. Ahern · Cleveland, OH9 sharedMichelle C. Blake · San Bruno, CA9 sharedJohn D. Schaefer · Cleveland, OH9 sharedFrederick M. Goltz · San Francisco, CA9 sharedR. C. Pica · Santa Rosa, CA9 sharedJohn John Hancock Life Insurance Company of New York · Boston, MA8 sharedJohn John Hancock Life Insurance Company (U.S.A.) · Boston, MA8 sharedMark Sherman · Atlanta, GA8 sharedNels D. Stemm · Seattle, WA8 sharedJote J. Kassa · NEW YORK, NY8 sharedJoseph P. Olszak · Cleveland, OH8 sharedChris Gagnier · Philadelphia, PA5 sharedBruce Rodio · Philadelphia, PA5 sharedPaul Cheng · Piedmont, CA5 shared
Recent filings (91)
GSCF Antora Co-Invest I, L.P.Mar 2026VigilanteX, Inc.Mar 2026 · 8 co-filers$5.0MGPC Funding I Master Fund A, L.P.Nov 2025 · 2 co-filersGPC Funding I Master Fund B, L.P.Nov 2025 · 2 co-filersGPC Funding I Master Fund A, L.P.Nov 2025 · 2 co-filersGPC Funding I Master Fund B, L.P.Nov 2025 · 2 co-filersGENERATE STRATEGIC CREDIT FUND (PARALLEL) I, L.P.Oct 2025GENERATE STRATEGIC CREDIT FUND I, L.P.Oct 2025VigilanteX, Inc.Aug 2025 · 17 co-filers$5.0MVigilanteX, Inc.Aug 2025 · 17 co-filers$5.0MMountainWorks LLCJul 2025 · 2 co-filersGSCF PSG CO-INVEST I FEEDER, L.P.Oct 2024 · 4 co-filersGENERATE STRATEGIC CREDIT FUND I, L.P.Oct 2024 · 4 co-filersGENERATE STRATEGIC CREDIT FUND (PARALLEL) I, L.P.Oct 2024 · 4 co-filersGSCF PSG CO-INVEST I, L.P.Oct 2024 · 4 co-filersMountainWorks LLCAug 2024 · 2 co-filersGENERATE NX FUND I, LPMay 2024GENERATE PGR FUND I, LPApr 2024Generate Capital, PBCJan 2024 · 44 co-filers$1.3BGenerate Capital, PBCJan 2024 · 44 co-filers$1.3BLucia Hospitality Group Inc.Jan 2024 · 6 co-filers$1.5MGenerate Capital, PBCDec 2023 · 44 co-filers$1.1BGenerate Capital, PBCDec 2023 · 44 co-filers$1.1BUpbound.ai, Inc.Nov 2023 · 2 co-filers$500KHanover Co-Invest B S.C.A. SICAV-RAIF Sub-Fund 1Jul 2023 · 29 co-filers$18.9M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See William in the interactive graph →