| Parks O-9-15919 | F&H Operating Company LLC only | Busher (Morris) | Runnels | 1 | 10.9K | 28.6K | Mar 2006 – Feb 2026 |
| Shirley O-13-30086 | Burlington Resources O & G Co LP only | Barnabus (Mississippian) | Wise | 1 | 10.8K | 220K | Sep 2002 – Jun 2016 |
| Hastedt, Emma G-3-136825 | Quintana Pet. Corp. only | Columbus ( 6-H) | Colorado | 1 | 10.8K | 440K | by Jan 1993 – Nov 1993 |
| Mayhew O-9-5973 | Bustos, Martin Oil only | C-M-R (Grayburg) | Upton | 1 | 10.7K | 21 | by Jan 1993 – Jan 2010 |
| Bush, Elmo O-11-68387 | Rocker a Operating Company only | Post, West (Strawn) | Garza | 1 | 10.7K | 2.51K | Dec 2001 – Jan 2006 |
| Hubberd, Wm. "C-1" G-4-210773 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 10.5K | 2.83M | Apr 2005 – Aug 2026 |
| Atkinson O-9-11075 | Bustamante Oil Company only | Irion, W. (Canyon) | Irion | 6 | 10.5K | 328K | by Jan 1993 – Oct 2022 |
| Martinez, D. G-4-139656 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 10.4K | 4.24M | by Jan 1993 – Aug 2026 |
| Columbus Field Unit G-3-169593 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 10.3K | 788K | Aug 1998 – Aug 2026 |
| Columbus Field Unit G-3-147736 | OXY USA Inc. only | Columbus ( 8-A) | Colorado | 1 | 10.3K | 281K | Nov 1993 – Oct 1994 |
| Terry "118" O-9-7587 | Bustamante Resources LLC only | Jameson (Strawn) | Coke | 2 | 10.3K | 197K | by Jan 1993 – Aug 2026 |
| Vanlandingham O-10-11489 | Bustamante Resources LLC only | McFarland, East (Queen) | Andrews | 5 | 10.2K | 101 | by Jan 1993 – Aug 2026 |
| Wm. Hubberd A2 G-4-167805 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 10.2K | 1.26M | Apr 1998 – Aug 2026 |
| Pierce Estates G-3-51155 | Bushmaster Production Comp, LLC only | Duncan Slough, SE. (Frio Lo.) | Matagorda | 1 | 10K | 696K | by Jan 1993 – Mar 2026 |
| Bush, J. B. O-5-3477 | Grant Resources, LLC only | Corsicana (Shallow) | Navarro | 2 | 9.93K | 0 | Jun 1994 – Aug 2026 |
| Haering - Martin G-4-116181 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 9.91K | 1.92M | by Jan 1993 – May 2026 |
| Bussey G-13-266444 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Parker | 1 | 9.89K | 1.65M | Jun 2012 – Aug 2026 |
| R. G. Lindholm Gas Unit G-1-194094 | Columbus Energy, LLC only | Rhode (7300) | McMullen | 1 | 9.76K | 1.05M | Apr 2003 – Jan 2010 |
| B.M.T. G-4-163587 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 9.63K | 1.27M | Jun 1997 – Dec 2016 |
| Busey-Gast Unit G-13-270796 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 9.61K | 684K | Aug 2013 – Aug 2026 |
| Bush, Lennie et Al O-5-1807 | Haynie Energy Services LLC only | Corsicana (Shallow) | Navarro | 11 | 9.39K | 21 | by Jan 1993 – Aug 2021 |
| Cisneros, Ynes G. O-2-6064 | Klotzman, M. S. Exploration Co. only | Labus (Austin) | Karnes | 1 | 9.36K | 18.1K | by Jan 1993 – Jun 2002 |
| Graham Ranch O-9-16573 | Bustamante Oil Company only | Noelke (Wolfcamp, Lower) | Crockett | 3 | 9.35K | 22.4K | Jun 2007 – Nov 2011 |
| Brown, Arnold M. O-8-28732 | Bustamante Oil Company only | Divide (King Sand) | Nolan | 1 | 9.26K | 3.39K | Jan 2000 – Mar 2007 |
| McKendrick, W. H. G-4-163711 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 9.12K | 2.35M | Jun 1997 – Aug 2026 |
| Jones, Beulah -A- O-7-7552 | Lebus Energy only | East Texas | Gregg | 9 | 9.1K | 6.48K | by Jan 1993 – Feb 2003 |
| Clark, N. H. G-4-161243 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 9.06K | 1.5M | Jul 1996 – Nov 2022 |
| Columbus Field Unit O-3-23615 | Devon Energy Operating Co., L.P. only | Columbus ( 7-E) | Colorado | 1 | 9.05K | 39.7K | Nov 1998 – Aug 2001 |
| Pollard-Hart O-10-8638 | Bustos, Martin Oil only | Wentz (Clear Fork) | Pecos | 2 | 9.04K | 21 | by Jan 1993 – May 1998 |
| Cullen, H. R. et Al G-3-150239 | Quintana Pet. Corp. only | Columbus (12-E Wilcox) | Colorado | 1 | 9.03K | 412K | May 1994 – Sep 1997 |
| B.M.T. G-4-178993 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.98K | 1.76M | Sep 2000 – Aug 2026 |
| Marek O-3-28314 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 8.94K | 8.74K | Jun 2026 – Aug 2026 |
| Haering - Martin G-4-71902 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 8.91K | 1.96M | by Jan 1993 – Aug 2024 |
| McKendrick, W.H. G-4-130007 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.85K | 4.1M | by Jan 1993 – Aug 2026 |
| Ruiz, J.M. G-4-61264 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 8.81K | 2.73M | by Jan 1993 – Oct 2019 |
| Hubberd , William "A" G-4-66694 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 8.78K | 2.86M | by Jan 1993 – Aug 2026 |
| Johnson "E" O-9-13185 | Bustamante Oil Company only | Jameson (Strawn) | Sterling | 1 | 8.77K | 133K | by Jan 1993 – Aug 2026 |
| Johnson -B- O-9-3091 | Bustamante Oil Company only | Jameson (Strawn) | Coke | 1 | 8.61K | 114K | by Jan 1993 – Jul 2026 |
| B.M.T. G-4-165976 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 8.54K | 2.93M | Dec 1997 – Aug 2026 |
| Acevedo-Haering G-4-154634 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 8.52K | 1.6M | Jun 1995 – Sep 2013 |
| Prosper Labus O-1-13643 | Pedeco, Inc. only | Marcelina Creek (Austin Chalk) | Wilson | 2 | 8.38K | 151 | by Jan 1993 – Aug 1998 |
| Arco Fee O-10-25667 | Bustos, Martin Oil only | Netterville | Pecos | 3 | 8.32K | 229 | by Jan 1993 – Feb 2009 |
| Zachry, H.B. -D G-4-82019 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 8.24K | 3.13M | by Jan 1993 – Aug 2026 |
| Prevost G-4-170710 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 8.21K | 1.43M | Oct 1998 – Aug 2026 |
| Hubberd, William G-4-92268 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 8.16K | 942K | by Jan 1993 – Aug 2026 |
| Wiatrek, P. V. O-2-11265 | Blackbrush O & G, LLC only | Labus (Austin) | Karnes | 1 | 8.1K | 26.1K | Jun 2016 – Oct 2017 |
| Labus, J. V. G-2-133296 | Mmar Group Inc only | Panna Maria (Edwards) | Karnes | 1 | 8.09K | 677K | by Jan 1993 – Jan 2023 |
| Harbus Trust G-2-215157 | Trio Consulting & Management,llc only | Hallettsville, South (Wx. 6900) | Lavaca | 1 | 8.03K | 640K | Sep 2005 – Jun 2008 |
| McMurrey O-13-30032 | Encana Oil & Gas(usa) Inc. only | Barnabus (Mississippian) | Denton | 1 | 8.02K | 243K | Apr 2002 – Oct 2005 |
| Texas Pecos River Tract 1-B O-10-17489 | Bustos, Martin Oil only | Rio Bravo (Wichita Albany, Up.) | Pecos | 1 | 8.01K | 36 | by Jan 1993 – Jul 2008 |