Investor · Glasgow, KY

Jack L. Markwell

Open Jack in the network graph →

Filings

9

SEC Form D

Connections

32

co-filers

Capital

—

across filings

Active

Jan 2009

to Dec 2025

Most-connected co-filers (32)

William Markwell · Glasgow, KY3 shared Rk Capital Management LLC · Denver, CO2 shared Geotechnical Holdings, Lp · Los Angeles, CA2 shared Geotechnical Holdings, Lp · Los Angeles, CA2 shared W. C. Mccollum · Los Angeles, CA2 shared Carl W. O'Sullivan · Grand Cayman, Cayman Islands2 shared Edward Mcdermott · London, United Kingdom2 shared Brendan C. O'Reilly · Los Angeles, CA2 shared Dominc Ivankovich · Los Angeles, CA2 shared Thomas Freeman · Bellevue, WA2 shared Geotechnical Holdings, Lp · Los Angeles, CA2 shared Charles Jobson · Boston, MA2 shared Jeffrey S. Malkin · Evergreen, CO2 shared Markahm H. Broyhill · Lenoir, NC1 shared John Hartman · Overland Park, KS1 shared Brett Michaud · Beaufort, NC1 shared William T. Obeid · New York, NY1 shared Scott Peacock · GLASGOW, KY1 shared Robert D. Hausmann · Burlington, MA1 shared Mark Markwell · GLASGOW, KY1 shared Joseph B. Alala, Iii · Charlotte, NC1 shared John Turner · Charlotte, NC1 shared Adam K. Brandley · Farmington, UT1 shared John F. Mcglinn · Charlotte, NC1 shared

Recent filings (9)

Geotechnical Management Aggregator, LLCDec 2025 · 11 co-filers Geotechnical Management Aggregator, LLCNov 2025 · 11 co-filers$8.8M H DOWNING PROJECTJun 2010$480K GULLY/RILEY PROJECT JOINT VENTURESep 2009 · 2 co-filers$1.8M WASHAM PROJECT NO. 2, GPJul 2009 · 1 co-filer$2.0M GULLY/RILEY PROJECT JOINT VENTUREJul 2009 · 2 co-filers$1.8M CAPITALSOUTH PARTNERS FUND III LPMay 2009 · 17 co-filers Energy Exploration, Inc.Feb 2009 · 3 co-filers$300K Energy Exploration, Inc.Jan 2009 · 3 co-filers$300K

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