Investor · Austin, TX

Mark Summers

Open Mark in the network graph →

Filings

6

SEC Form D

Connections

20

co-filers

Capital

$7.5M

across filings

Active

Feb 2010

to Mar 2026

Most-connected co-filers (20)

Randy K. Scott · Austin, TX3 shared Robert K. Baurys · Austin, TX3 shared John Otten · Greenville, SC2 shared Michael Rogers · VANCOUVER, British Columbia, Canada2 shared James Claseman · EDEN PRAIRIE, MN2 shared Luanne Runge · Greenville, SC2 shared Stephen Pelcher · Greenville, SC2 shared Seth K. Nelson · Austin, TX2 shared Daniel Beck · West Jordan, UT2 shared Jon Roberts · Plymouth, MN1 shared Terence O'Hara · Glen Burnie, MD1 shared Alan Paz · Modi'in Maccabim Re'ut, L31 shared Frank Sheehy · NEEDHAM, MA1 shared Robert Rebak · Austin, TX1 shared Terry O'Hara · Austin, TX1 shared Anthony T. Williams · Austin, TX1 shared K T. O'Hara · Austin, TX1 shared Gerald Lieberman · Jerusalem, L31 shared Rick Diamond · Eden Prairie, MN1 shared Liron Levi-Gabay · Modi'in Maccabim Re'ut, L31 shared

Recent filings (6)

Dosentrx Ltd.Mar 2026 · 6 co-filers$6.0M 83Bar, Inc.Dec 2025 · 14 co-filers$9.0M 83Bar, Inc.Dec 2025 · 14 co-filers$9.0M 83Bar, Inc.Apr 2025 · 12 co-filers$9.5M 83Bar, Inc.Apr 2025 · 12 co-filers$9.5M 83Bar, Inc.Oct 2023 · 9 co-filers$3.5M 83Bar, Inc.Oct 2023 · 9 co-filers$3.5M THREEWIRE INCAug 2012 · 6 co-filers$1.0M THREEWIRE INCAug 2012 · 6 co-filers$1.0M THREEWIRE INCFeb 2010 · 4 co-filers$600K THREEWIRE INCFeb 2010 · 4 co-filers$600K

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