Investor · Austin, TX

John B. Henneman

Open John in the network graph →

Filings

3

SEC Form D

Connections

19

co-filers

Capital

$5.4M

across filings

Active

Jul 2017

to Dec 2025

Most-connected co-filers (19)

John G. Joyoprayitno · Austin, TX2 shared Kyle A. Cox · Austin, TX2 shared James P. Feller · Austin, TX2 shared Daniel G. Peterson · Austin, TX2 shared R. G. Brophy · Austin, TX2 shared Jerry Devries · Austin, TX2 shared Jean-Pierre Bizzari · Holon, L31 shared Michael Grissinger · London, United Kingdom1 shared Rifat C. Pamukcu · Hummelstown, PA1 shared Bernd Seizinger · Harpswell, ME1 shared Marc P. Duey · Doylestown, PA1 shared Gabriela P. Gruia · Doylestown, PA1 shared John P. Hamill · Madison, WI1 shared Richard P. Peters · Doylestown, PA1 shared Oren Gilad · Doylestown, PA1 shared Peter J. Ogren · Burlington, MA1 shared Lou D. Canakes Ii · New York, NY1 shared Mark E. Benedyk · Houston, TX1 shared James B. Gamett · Encinitas, CA1 shared

Recent filings (3)

Aprea Therapeutics, Inc.Dec 2025 · 20 co-filers$5.8M Aprea Therapeutics, Inc.Dec 2025 · 20 co-filers$5.8M Alafair Biosciences, Inc.Oct 2018 · 15 co-filers$6.8M Alafair Biosciences, Inc.Oct 2018 · 15 co-filers$6.8M Alafair Biosciences, Inc.Jul 2017 · 12 co-filers$2.0M Alafair Biosciences, Inc.Jul 2017 · 12 co-filers$2.0M

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