| Kollman Charles F. G-3-120769 | Elliott Oil & Gas Operating Co. only | Columbus (Consolidated) | Colorado | 1 | 32.5K | 1.13M | by Jan 1993 – Oct 2003 |
| Reid, Buster O-3-23481 | Barrow-Shaver Resources Co. only | BSR (Sub-Clarksville) | Madison | 1 | 32.2K | 87.1K | May 1998 – Nov 2002 |
| Karon Unit G-2-90483 | Columbus Energy, LLC only | Karon (Luling) | Live Oak | 1 | 32K | 3.11M | by Jan 1993 – Dec 2006 |
| Pumphrey, Jay B. O-8-11429 | Bustamante Resources LLC only | Ashmore (Conglomerate) | Stonewall | 1 | 32K | 1.53K | by Jan 1993 – Mar 2026 |
| Bush -B- O-14-6583 | Burk Royalty Co., Ltd. only | Carlander (Marmaton) | Sherman | 2 | 31.6K | 196K | by Jan 1993 – Jan 2002 |
| Prevost G-4-158034 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 31.6K | 4.13M | Feb 1996 – Apr 2026 |
| Reagan, L. A. G-2-105760 | Columbus Energy, LLC only | Oakville, E. (Wilcox 9400) | Live Oak | 1 | 31.4K | 775K | by Jan 1993 – Feb 2020 |
| Lindholm C S Gas Unit G-1-136506 | Columbus Energy, LLC only | Rhode (10,600 Wilcox) | McMullen | 1 | 31.4K | 2.83M | by Jan 1993 – Apr 2026 |
| Cullen, H. R. et Al G-3-133431 | Quintana Pet. Corp. only | Columbus (12-F) | Colorado | 1 | 31.2K | 1.01M | by Jan 1993 – Jul 1999 |
| Hartman O-13-30005 | EOG Resources, Inc. only | Barnabus (Mississippian) | Montague | 1 | 30.6K | 146K | Mar 2001 – Jul 2016 |
| North Susan Peak Unit O-9-13648 | Bustamante Resources LLC only | Susan Peak, North (Canyon) | Tom Green | 12 | 30.5K | 34.4K | Jul 1994 – Jan 2022 |
| Foegelle, Adrian O-2-9256 | Enervest Operating, L.L.C. only | Labus (Austin) | Karnes | 1 | 30.3K | 115K | Aug 2008 – Nov 2017 |
| Bush O-9-13423 | Felderhoff Production Company only | Needle Creek (Strawn) | McCulloch | 3 | 30.2K | 24.4K | Apr 1993 – Apr 2026 |
| Labus Unit O-1-9919 | Oilstone Operating, LLC only | Marcelina Creek (Buda) | Wilson | 1 | 30K | 19 | by Jan 1993 – May 2010 |
| Cullen, H. R. et Al O-3-23383 | Hilcorp Energy Company only | Columbus (7150) | Colorado | 1 | 29.7K | 60.4K | Nov 1997 – Mar 2001 |
| Buske East O-8-26927 | Sojourner Drilling Corporation only | Jones County Regular | Jones | 2 | 29.6K | 18 | May 1993 – Apr 2026 |
| Ferrel O-9-19140 | Shoco Production LLC only | Busher (Morris) | Runnels | 4 | 29.6K | 40.9K | Jun 2015 – Mar 2026 |
| Columbus Field Unit G-3-171273 | Devon Energy Production Co, L.P. only | Columbus (Consolidated) | Colorado | 1 | 29.5K | 1.09M | Oct 1998 – Feb 2006 |
| Ussery O-8-27501 | Bustamante Oil Company only | Triple B (Palo Pinto) | Nolan | 1 | 29.4K | 42.6K | Mar 1995 – Aug 2011 |
| Hefley G-14-263600 | Hayabusa Energy USA, LLC only | Buffalo Wallow (Granite Wash) | Hemphill | 1 | 29.3K | 1.88M | Aug 2011 – Apr 2026 |
| Busch-Shelton O-3-16363 | King Operating Corporation only | Goose Creek | Harris | 1 | 28.7K | 38 | by Jan 1993 – Jan 2015 |
| Bush-Bush Unit O-3-21684 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Burleson | 1 | 28.7K | 201K | by Jan 1993 – Mar 2000 |
| Rancho Blanco G-4-155279 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 28.6K | 4.28M | Jul 1995 – Apr 2026 |
| Rhode, D. W. 26 G-1-119903 | Columbus Energy, LLC only | Rhode (10,600 Wilcox) | McMullen | 1 | 28.4K | 3.23M | by Jan 1993 – Apr 2026 |
| Benavides TR 2 G-4-137880 | Columbus Energy, LLC only | Acevedo (Lobo 6) | Webb | 1 | 27.9K | 5.23M | by Jan 1993 – Apr 2026 |
| Busch O-14-9850 | Upland Resources LLC only | Pan Petro (Cleveland) | Ochiltree | 1 | 27.6K | 30.2K | Jun 2024 – Apr 2026 |
| Prevost G-4-163522 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 27.6K | 5.01M | Apr 1997 – Apr 2026 |
| Balloon Buster Unit O-1-21892 | Verdun Oil & Gas LLC only | Eagleville (Eagle Ford-1) | Dimmit | 1 | 27.5K | 82.4K | Jan 2026 – Apr 2026 |
| Bush, Jerry Glenn "C" O-9-13801 | Felderhoff Production Company only | Needle Creek (Strawn) | McCulloch | 1 | 27.5K | 233 | Jun 1995 – Apr 2026 |
| Busch Shelton "B" O-3-16865 | King Operating Corporation only | Goose Creek | Harris | 2 | 27K | 38 | by Jan 1993 – Sep 2021 |
| Columbus Professional Bldgs Inc O-3-13027 | Anadarko E&P Company LP only | Giddings (Austin Chalk-3) | Burleson | 3 | 26.5K | 205K | by Jan 1993 – Dec 1996 |
| Hastedt, Emma O-3-8357 | Hilcorp Energy Company only | Columbus (7050) | Colorado | 1 | 26.1K | 142K | by Jan 1993 – Aug 2001 |
| Acevedo-Haering G-4-152440 | Columbus Energy, LLC only | Acevedo (Lobo 6) | Webb | 1 | 26.1K | 4.88M | Nov 1994 – Apr 2026 |
| Alexander, Charles G-4-165681 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.7K | 7.65M | Nov 1997 – Apr 2026 |
| Karon Unit G-2-93975 | Columbus Energy, LLC only | Karon (Luling) | Live Oak | 1 | 25.6K | 2.54M | by Jan 1993 – Mar 2016 |
| Alexander, Charles G-4-167535 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.4K | 5.14M | Mar 1998 – Apr 2026 |
| Howell Estate O-10-30436 | Bustamante Resources LLC only | McFarland, East (Queen) | Andrews | 1 | 25.2K | 396 | by Jan 1993 – Mar 2026 |
| Gap O-10-29530 | Bustamante Resources LLC only | McElroy | Upton | 3 | 25.2K | 8.24K | by Jan 1993 – Jan 2023 |
| Bush, J. B. /R. P./ O-5-1018 | Thurston Texas Operating Co LLC only | Powell | Navarro | 4 | 25.1K | 35 | by Jan 1993 – Nov 2020 |
| Block, Anna G-4-162572 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.1K | 3.62M | Dec 1996 – Sep 2003 |
| Busch G-14-141544 | Remnant Energy, Inc. only | John (Basal Chester) | Ochiltree | 1 | 25K | 446K | by Jan 1993 – Jan 2016 |
| Hubberd, William "C1" G-4-146480 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 24.9K | 4.36M | Apr 1993 – Apr 2026 |
| Hubberd, William A G-4-167287 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 24.9K | 2.96M | Feb 1998 – Apr 2026 |
| Hastedt, Emma "B" G-3-165917 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 24.9K | 1.09M | Nov 1997 – Apr 2026 |
| Bayou Development B O-3-24601 | Columbus Energy, LLC only | Dickinson (Frio Cons.) | Galveston | 3 | 24.7K | 128K | Sep 2004 – Oct 2024 |
| Hubberd, William "C1" G-4-146561 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 24.4K | 6.22M | Jul 1993 – Apr 2026 |
| Martinez, D.S. G-4-168891 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 24.2K | 2.86M | Feb 1998 – Apr 2026 |
| Bussey G-13-257404 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Parker | 1 | 24.1K | 1.56M | Jun 2010 – Apr 2026 |
| S.J.R.A. Unit "B" G-3-143719 | Columbus Energy Corp. only | Sralla Road (Jackson 9050) | Harris | 1 | 23.9K | 1.38M | by Jan 1993 – Apr 2001 |
| Alexander, Charles G-4-169465 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 23.9K | 3.3M | May 1998 – Sep 2016 |