Ledger.
Investor · Lexington, MA

William P. O'Neill

Open William in the network graph →
Filings
13
SEC Form D
Connections
80
co-filers
Capital
$132.1M
across filings
Active
Jul 2019
to Aug 2025

Most-connected co-filers (80)

Eduardo P. Avayu · Lexington, MA12 sharedJill J. Buckley · Lexington, MA9 sharedStephen A. Eckert · Lexington, MA8 sharedLaura J. Daniels · Lexington, MA8 sharedEric J. Newman · Lexington, MA8 sharedMichael D. Testa · Lexington, MA8 sharedRobert J. Haime · Lexington, MA8 sharedAndrew P. Dunham · Lexington, MA8 sharedGregory Webb · New York, NY7 sharedLaurel J. Omert · Lexington, MA7 sharedCarter Griffin · WASHINGTON, Washington, D.C.7 sharedYotam Mann · Brooklyn, NY7 sharedScott Eldridge · Vancouver, British Columbia, Canada7 sharedRyan Rawson · Berkeley, CA7 sharedBuddy Doyle · VANCOUVER, British Columbia, Canada7 sharedJonathan Seeber · Washington, Washington, D.C.7 sharedJohn Bottles · Eagle, ID7 sharedAlex Newman · Berkeley, CA7 sharedKarunya Lakshmi · New York, NY7 sharedMichael Gregoire · New York, NY7 sharedLarry Biagini · New York, NY7 sharedBinny Jassal · VANCOUVER, British Columbia, Canada7 sharedAdolph Lombardi · Columbus, OH7 sharedThomas Yingling · Vancouver, British Columbia, Canada7 shared

Recent filings (13)

Hemanext Inc.Aug 2025 · 47 co-filers$24.0MHemanext Inc.Jul 2025 · 47 co-filers$21.7MHemanext Inc.Jan 2024 · 41 co-filers$10.0MHemanext Inc.Nov 2023 · 41 co-filers$11.3MHemanext Inc.Feb 2023 · 52 co-filers$15.0MHemanext Inc.Oct 2021 · 44 co-filers$59.5MPERIODIC INC.Apr 2021 · 16 co-filers$1.0MInspiration DP 2021-D, LPApr 2021 · 5 co-filers$15.0MHemanext Inc.Oct 2020 · 40 co-filers$44.5MPERIODIC INC.Nov 2019 · 16 co-filers$900KInspiration Ventures 3, L.P.Nov 2019 · 5 co-filers$20.0MNew Health Sciences, Inc.Oct 2019 · 27 co-filers$14.5MNew Health Sciences, Inc.Oct 2019 · 27 co-filers$14.5MInspiration Ventures Secondary Fund I, L.P.Jul 2019 · 4 co-filers

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