| Williamson G-3-176024 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 84.3K | 3.11M | Jan 2000 – Aug 2026 |
| Williamson, et Al G-3-193463 | Timberwolf Energy, Inc. only | Angleton, South (12,100 Frio) | Brazoria | 1 | 38.1K | 1.16M | Nov 2002 – Aug 2026 |
| Williamson G-6-209230 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 30.2K | 1.91M | Jan 2005 – Aug 2026 |
| Williamson, Stanley H. G-4-145890 | EOG Resources, Inc. only | Cinco Compadres (Lobo) | Webb | 1 | 26.6K | 4.3M | Feb 1993 – Mar 2011 |
| Williamson-Retrieve Unit No. 1 G-3-130811 | Wing Corporation only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 23.8K | 2.02M | by Jan 1993 – Feb 1999 |
| Williamson G-3-94897 | Wing Corporation only | Angleton, S. (Frio 13 FB-B) | Brazoria | 1 | 21.6K | 934K | by Jan 1993 – Nov 1999 |
| Wedgeworth et Al-Williamson G-6-294451 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 19.7K | 2.99M | Jan 2023 – Aug 2026 |
| Williamson G-3-158703 | Timberwolf Energy, Inc. only | Angleton, S. (Frio 13 FB-C) | Brazoria | 1 | 18.9K | 913K | Apr 1996 – Sep 2004 |
| Williamson G-6-178787 | Sheridan Production Company, LLC only | Carthage (Cotton Valley) | Panola | 1 | 17.7K | 953K | Jun 2000 – Aug 2019 |
| Williamson G-6-203670 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 16.3K | 2.3M | Jul 2004 – Aug 2026 |
| Williamson G-6-110325 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 16.3K | 2.15M | by Jan 1993 – Aug 2026 |
| Williamson G-3-224124 | Timberwolf Energy, Inc. only | Angleton, S. (F-4 FB-AZ) | Brazoria | 1 | 16.3K | 150K | Jun 2005 – Aug 2026 |
| Williamson G-6-132717 | Sheridan Production Co III, LLC only | Carthage (Cotton Valley) | Panola | 1 | 13.9K | 1.26M | by Jan 1993 – Feb 2021 |
| Williamson G-6-171018 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 13.9K | 1.79M | Apr 1998 – Aug 2026 |
| Williamson G-6-219723 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 13.7K | 2.11M | Mar 2006 – Aug 2026 |
| Williamson, Stanley "B" G-4-143740 | EOG Resources, Inc. only | Cinco Compadres (Lobo) | Webb | 1 | 13.4K | 1.14M | by Jan 1993 – Aug 2004 |
| Williamson, H. Stanley "B" G-4-145155 | Bluestone Natural Res. II, LLC only | Cinco Compadres (Lobo) | Webb | 1 | 13.2K | 2.15M | Feb 1993 – Aug 2013 |
| Williamson G-6-204338 | Diversified Production LLC only | Carthage (Travis Peak 6296) | Panola | 1 | 13.1K | 1.54M | Jul 2004 – Aug 2026 |
| Williamson G-6-207834 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 11.5K | 1.23M | Feb 2005 – Aug 2026 |
| Williamson G-6-204333 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 11.2K | 1.44M | Jun 2004 – Aug 2026 |
| Williamson G-6-207758 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 10.5K | 1.76M | Dec 2004 – Aug 2026 |
| Jordan-Williamson G-6-294526 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 10.1K | 1.81M | Jan 2023 – Aug 2026 |
| Williamson, S.H. et Al G-4-145665 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 9.93K | 2.31M | May 1993 – Aug 2026 |
| Williamson G-6-203543 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 9.55K | 1.21M | Jun 2004 – Aug 2026 |
| Williamson G-3-213140 | Timberwolf Energy, Inc. only | Angleton, S. (Frio 13 FB-B) | Brazoria | 1 | 9.43K | 257K | Feb 2005 – Aug 2026 |
| Williamson, Stanley H. G-4-168554 | Blackbeard Operating, LLC only | Big Cowboy (Lobo) | Webb | 1 | 8.72K | 2.25M | Jun 1998 – Aug 2013 |
| Williamson Trust G-3-205881 | Noble Energy Inc only | Blue Lake (10500) | Brazoria | 1 | 7.41K | 1.42M | Aug 2004 – Jan 2008 |
| Williamson G-6-152896 | Devon Energy Production Co, L.P. only | Carthage (Cotton Valley) | Panola | 1 | 7.4K | 816K | Dec 1994 – Aug 2006 |
| Williamson G-6-196160 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 7.25K | 1.07M | Jun 2003 – Aug 2026 |
| Williamson G-6-229037 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 7.22K | 1.04M | May 2007 – Aug 2026 |
| Williamson, Stanly H. G-4-144892 | EOG Resources, Inc. only | Cinco Compadres (Lobo) | Webb | 1 | 7.08K | 1.28M | by Jan 1993 – Nov 2010 |
| Williamson G-6-168485 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 6.76K | 588K | Nov 1997 – Aug 2026 |
| Williamson G-6-220889 | Diversified Production LLC only | Carthage (Travis Peak 6450) | Panola | 1 | 6.7K | 645K | Apr 2006 – Jul 2026 |
| Williamson-Retrieve Unit No. 1 G-3-173119 | Timberwolf Energy, Inc. only | Angleton, South (F-9 Block D) | Brazoria | 1 | 6.31K | 739K | Mar 1999 – Aug 2026 |
| Williamson Unit G-6-198761 | Grayrock Energy II, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 6.31K | 1.02M | Nov 2003 – Feb 2024 |
| Williamson G-6-239170 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 5.82K | 1.01M | Aug 2008 – Aug 2026 |
| Williamson G-6-230828 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 5.63K | 985K | Aug 2007 – Aug 2026 |
| Williamson, S. H. et Al G-4-112286 | Hilcorp Energy Company only | El Caballero (Lobo) | Webb | 1 | 5.63K | 1.44M | by Jan 1993 – Aug 2026 |
| Williamson G-6-223538 | Diversified Production LLC only | Carthage (Travis Peak 6296) | Panola | 1 | 5.54K | 123K | Sep 2006 – Dec 2013 |
| Williamson G-6-228374 | Sheridan Production Co III, LLC only | Carthage (Cotton Valley) | Panola | 1 | 5.34K | 795K | Apr 2007 – Jun 2022 |
| Williamson Unit G-6-186541 | Highmark Energy Operating, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 5.09K | 783K | Nov 2001 – Oct 2018 |
| Williamson Unit G-6-199910 | Grayrock Energy II, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 5K | 695K | Dec 2003 – Nov 2021 |
| Williamson Unit G-6-238634 | Grayrock Energy II, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 4.82K | 721K | Jun 2008 – Aug 2026 |
| Williamson G-6-234550 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 4.75K | 1.21M | Jan 2008 – Aug 2026 |
| Williamson G-6-131958 | Devon Energy Production Co, L.P. only | Carthage (Cotton Valley) | Panola | 1 | 4.7K | 496K | by Jan 1993 – Apr 2003 |
| Williamson, Stanley H. G-4-168907 | EOG Resources, Inc. only | Big Cowboy (Lobo) | Webb | 1 | 4.7K | 815K | Jun 1998 – Oct 2011 |
| Williamson, M.M. GU G-6-227748 | TGNR East Texas II LLC only | Beckville (Cotton Valley) | Panola | 1 | 4.46K | 732K | Apr 2007 – Aug 2026 |
| Williamson, Gena G-6-30239 | Faulconer, Vernon E., Inc. only | Carthage (Pettit, Lower Gas) | Panola | 1 | 4.35K | 667K | by Jan 1993 – May 2010 |
| Williamson, M.M. GU G-6-221648 | TGNR East Texas II LLC only | Beckville (Cotton Valley) | Panola | 1 | 4.35K | 805K | May 2006 – Jun 2019 |
| Williamson, S.H. G-4-117564 | Conocophillips Company only | Dix Ranch (Lower Wilcox Lobo) | Webb | 1 | 4.23K | 332K | May 1993 – Oct 2002 |