Investor · Austin, TX
William T. Bainborough
Open William in the network graph →Filings
18
SEC Form D
Connections
137
co-filers
Capital
$19.6M
across filings
Active
Feb 2022
to Dec 2025
Most-connected co-filers (137)
Stephen T. Matthews · Austin, TX11 sharedBrent T. Terry · Austin, TX8 sharedJoseph M. Caldwell · Minnetonka, MN8 sharedJon M. Davis · Austin, TX6 sharedKent T. Kubie · Austin, TX6 sharedAlexander R. Slusky · San Francisco, CA5 sharedBibi S. Mallam-Hassam · Ebene, Cybercity, O45 sharedDenis M. Hebert · Austin, TX5 sharedBrandon Reeves · Torrance, CA5 sharedMarwan T. Kathayer · London, United Kingdom5 shareda UK Company Doordeck Limited · London, United Kingdom5 sharedJason T. Bohrer · Austin, TX5 sharedJoseph Van Den Elsen · Vancouver, British Columbia, Canada4 sharedRene Bremauntz · Houston, TX4 sharedFederico Dubini · Atherton, CA4 sharedJulian Bavin · Vancouver, British Columbia, Canada4 sharedRachael Wingo · Columbus, OH4 sharedSamer H. Yehia · Lod, L34 sharedSarwan K. Ramphul · St Julien Village, O44 sharedDelian Asparouhov · San Francisco, CA4 sharedWilliam Tsang · VANCOUVER, British Columbia, Canada4 sharedRuth Smadja · Lod, L34 sharedJeff S. Fronterhouse · Dallas, TX3 sharedMember/Manager Appomattox Advisory, Inc · New York, NY3 shared
Recent filings (18)
Updata Partners VIII, L.P.Dec 2025 · 11 co-filers$800.0MCurrent Clinic Inc.Apr 2025 · 5 co-filers$4.5MCurrent Clinic Inc.Sep 2024 · 5 co-filers$1.5MSentry Kiosk, Inc.Aug 2024 · 37 co-filers$10.0MSentry Kiosk, Inc.Aug 2024 · 37 co-filers$10.0MSentry Kiosk, Inc.Aug 2024 · 37 co-filers$10.0MSentry Kiosk, Inc.Aug 2024 · 42 co-filers$15.7MSentry Kiosk, Inc.Aug 2024 · 42 co-filers$15.7MSentry Kiosk, Inc.Aug 2024 · 42 co-filers$15.7MSentry Kiosk, Inc.Aug 2024 · 42 co-filers$15.7MSentry Kiosk, Inc.Jun 2024 · 27 co-filers$10.0MFIRST BUSINESS FINANCIAL SERVICES, INC.Oct 2023 · 51 co-filers$15.0MSILVER X MINING CORP.Jul 2023 · 21 co-filers$811KSentry Kiosk, Inc.May 2023 · 23 co-filers$15.0MSentry Kiosk, Inc.May 2023 · 23 co-filers$10.0MLiminal Insights, Inc.Feb 2023 · 6 co-filers$17.5MLiminal Insights, Inc.Nov 2022 · 7 co-filers$8.8MSILVER X MINING CORP.Nov 2022 · 17 co-filers$33KSILVER X MINING CORP.Nov 2022 · 17 co-filers$882KUpdata Partners VII, L.P.Mar 2022 · 10 co-filers$600.0MFIRST BUSINESS FINANCIAL SERVICES, INC.Mar 2022 · 60 co-filers$12.5MFIRST BUSINESS FINANCIAL SERVICES, INC.Mar 2022 · 60 co-filers$20.0MUpdata Partners VII, L.P.Feb 2022 · 10 co-filers$500.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See William in the interactive graph →