Investor · Atlanta, GA

Thomas O'Brien

Open Thomas in the network graph →

Filings

13

SEC Form D

Connections

36

co-filers

Capital

$14.2M

across filings

Active

Sep 2009

to Oct 2025

Most-connected co-filers (36)

James Nahirny · Atlanta, GA6 shared Michelle Jarrard · Atlanta, GA5 shared Michael W. Masters · Atlanta, GA4 shared Johan D. Swildens · San Francisco, CA3 shared Nili W. Jaisinghani · Plano, TX3 shared Joshua L. Blachman · San Francisco, CA3 shared Brian C. Dilaura · San Francisco, CA3 shared Kurt Yockey · MOODUS, CT2 shared Earl E. Williams, Jr · Memphis, TN2 shared Robert Smith · Boston, MA2 shared Chris Irwin · Toronto, Ontario, Canada2 shared Kerry J. Murphy Healey · New York, NY2 shared Daniel Konopka · Highlands Ranch, CO2 shared David C. Anderson · St. Louis, MO2 shared Craig C. Hoagland · St. Louis, MO2 shared Laurance R. Hoagland Iii · St. Louis, MO2 shared Kenneth Ramirez · Tempe, AZ2 shared John Jordan · MOODUS, CT2 shared Pierre B. Picard · Luxembourg, Luxembourg2 shared Fanny M. Kindler · Luxembourg, Luxembourg2 shared Ayesha B. Wagle · SAN FRANCISCO, CA2 shared James Ross · Decatur, GA2 shared Mason Chilmonczyk · Atlanta, GA2 shared Andrei Fedorov · Atlanta, GA2 shared

Recent filings (13)

Andson Biotech Inc.Oct 2025 · 11 co-filers$5.0M Andson Biotech Inc.Oct 2025 · 11 co-filers$5.0M Andson Biotech Inc.Mar 2024 · 7 co-filers$3.6M Andson Biotech Inc.Mar 2024 · 7 co-filers$3.6M Brick Dynamics Inc.Dec 2023 · 3 co-filers$4.3M Brick Dynamics Inc.Dec 2023 · 3 co-filers$4.3M BioCircuit Technologies, Inc.Oct 2022 · 11 co-filers$9.0M APC Opportunity Fund XII, LLCMar 2022 · 7 co-filers$3.6M APC Opportunity Fund XIII, LLCMar 2022 · 7 co-filers$1.0M BioCircuit Technologies, Inc.Apr 2021 · 5 co-filers$1.5M BioCircuit Technologies, Inc.Apr 2021 · 5 co-filers$1.5M BioCircuit Technologies, Inc.Apr 2021 · 11 co-filers$3.1M VIRTUAL FIRST INC.Dec 2020 · 8 co-filers$350K APC Opportunity Fund VII, LLCMay 2020 · 7 co-filers$8.0M VIRTUAL FIRST INC.May 2020 · 8 co-filers$125K Champagne Funds Total Return, LLCDec 2013 · 1 co-filer Champagne Funds Total Return, LLCDec 2013 · 1 co-filer VirnetX Holding CorpSep 2009 · 7 co-filers$22.3M VirnetX Holding CorpSep 2009 · 7 co-filers$22.3M

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