Investor · Houston, TX

Richard F. Langdon

Open Richard in the network graph →

Filings

18

SEC Form D

Connections

60

co-filers

Capital

$371.4M

across filings

Active

Sep 2013

to Apr 2023

Most-connected co-filers (60)

William Cowen · Hadley, MA11 shared Byrd F. Larberg · Houston, TX10 shared Charles C. Ward · Houston, TX10 shared Paul Weiss · CORAL GABLES, FL6 shared Jorge Netto · CORAL GABLES, FL6 shared Dmazana G. Lumukanda · Orlando, FL6 shared Marla K. Ritchie · Vancouver, British Columbia, Canada6 shared Abinger Capital LLC · New York, NY6 shared Gerald F. Willinger · Houston, TX5 shared David Grier · New York, NY5 shared Laura Philips · New York, NY5 shared Michael J. Kaufman · New York, NY5 shared Edward G. Wolynic · PEALR RIVER, NY4 shared Carlos G. Gonzalez · PEARL RIVER, NY4 shared J. L. Williams · Burlington, VT4 shared Gordon Smith · Beverly Hills, CA4 shared Jane E. Hills · Aspen, CO4 shared Alan F. Bigman · Houston, TX4 shared Jonathan J. Snyder · Las Vegas, NV4 shared QMS Capital Management LP · Durham, NC4 shared Matt Stapleton · Sandy, UT4 shared a Colorado LLC Austin Lawrence Partners, LLC · Aspen, CO4 shared Thomas G. Erickson · PEARL RIVER, NY4 shared Alex Jiao · Seattle, WA3 shared

Recent filings (18)

Spheryx, Inc.Apr 2023 · 5 co-filers$2.8M Spheryx, Inc.Dec 2018 · 5 co-filers$2.0M Spheryx, Inc.Oct 2017 · 5 co-filers$1.0M Spheryx, Inc.Oct 2015 · 5 co-filers$1.1M Sanchez Production Partners LPOct 2015 · 29 co-filers$350.0M Sanchez Production Partners LPApr 2015 · 17 co-filers$17.4M Sanchez Production Partners LPApr 2015 · 17 co-filers$2.0M Sanchez Production Partners LPApr 2015 · 14 co-filers$2.0M Caltius Equity Partners III, LPJan 2015 · 11 co-filers$207.5M Spheryx, Inc.Jan 2015 · 5 co-filers Caltius Equity Partners Executive III, LPJan 2015 · 11 co-filers$207.5M Caltius Equity Partners III, LPSep 2014 · 7 co-filers$207.5M Caltius Equity Partners Executive III, LPSep 2014 · 7 co-filers$207.5M GULFSLOPE ENERGY, INC.Jul 2014 · 5 co-filers$8.0M Caltius Equity Partners Executive III, LPSep 2013 · 7 co-filers$7.5M Caltius Equity Partners III, LPSep 2013 · 7 co-filers$200.0M Constellation Energy Partners LLCAug 2013 · 8 co-filers$10.3M GASCO ENERGY INCJul 2010 · 10 co-filers$65.0M

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