| Busch Gas Unit O/A G-3-100447 | Daylight Petroleum LLC only | Milton, N. (13000) | Harris | 1 | 6.34K | 190K | by Jan 1993 – Jan 2002 |
| Rancho Blanco G-4-156771 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 6.31K | 1.79M | Oct 1995 – Aug 2026 |
| Martinez, Senesio G-4-60112 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 6.27K | 765K | by Jan 1993 – Jul 2017 |
| Alexander, Charles G-4-194387 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 6.27K | 1.62M | Feb 2003 – Aug 2026 |
| Alexander, Charles G-4-166204 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 6.22K | 2.6M | Mar 1997 – Mar 2015 |
| Connaway O-8-13719 | Bustamante Oil Company only | Brown County Regular | Brown | 6 | 6.21K | 220 | by Jan 1993 – Jan 2025 |
| Duty Gas Unit G-2-115714 | Columbus Energy, LLC only | Maxine, East (9100) | Live Oak | 1 | 6.21K | 386K | Aug 1994 – Jan 2007 |
| Alexander, Charles G-4-192830 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 6.21K | 3.98M | Oct 2002 – Aug 2026 |
| Haering-Martin G-4-155342 | Columbus Energy, LLC only | Acevedo (Lobo 6) | Webb | 1 | 6.2K | 2.46M | Jul 1995 – Aug 2026 |
| Busey-Gast Unit G-13-261427 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 6.19K | 284K | Mar 2011 – Mar 2019 |
| Cal-Mex G-4-185567 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 6.17K | 2.4M | May 2001 – Aug 2026 |
| Busey-Gast Unit G-13-261310 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 6.11K | 435K | Mar 2011 – Apr 2019 |
| Charles Alexander D G-4-170403 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 6.09K | 2.67M | Sep 1998 – Aug 2026 |
| Ruiz, J. M. G-4-168552 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 6.09K | 1.41M | Apr 1998 – Aug 2026 |
| Cedar Bayou G-3-144326 | Columbus Energy Corp. only | Sralla Road (Vicksburg) | Harris | 1 | 6.09K | 511K | by Jan 1993 – Dec 1994 |
| Columbus Townsite Unit G-3-144825 | Magnum Producing & Operating Co. only | Cecil Noble (Schiller) | Colorado | 1 | 6.07K | 243K | Mar 1993 – Apr 2000 |
| Varibus G-5-136009 | Hilcorp Energy Company only | Bear Grass (Travis Peak) | Leon | 1 | 6.05K | 2.38M | by Jan 1993 – Aug 2026 |
| McNary - Warrior G-4-98330 | Columbus Energy, LLC only | McNary (Hirsch 6950 Sd.) | Webb | 1 | 6.04K | 1.4M | by Jan 1993 – Jun 2016 |
| Hubberd, William C 3 G-4-189991 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 6.04K | 1.45M | Apr 2002 – Aug 2026 |
| Crockett, V. W. -A- O-10-36530 | Bustos, Martin Oil only | Lehn-Apco, S. (Wichita-Albany) | Pecos | 1 | 5.94K | 11K | Oct 2000 – Mar 2008 |
| Hubberd G-4-154061 | Columbus Energy, LLC only | Liz (9200) | Webb | 1 | 5.92K | 699K | Feb 1995 – Aug 2026 |
| Columbus Field Unit G-3-129342 | Mitchell Energy Corporation only | Columbus ( 7-E) | Colorado | 1 | 5.83K | 438K | by Jan 1993 – Mar 1999 |
| Labus, Prosper O-1-14249 | First Rock, Inc. only | Marcelina Creek (Buda) | Wilson | 1 | 5.8K | 2.56K | Feb 1999 – Dec 2015 |
| Acevedo-Haering G-4-79315 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 5.74K | 1.5M | by Jan 1993 – Aug 2026 |
| Hart, McAlester O-10-7827 | Bustos, Martin Oil only | Wentz (Clear Fork) | Pecos | 1 | 5.73K | 21 | by Jan 1993 – May 1998 |
| Columbus Field Unit G-3-129078 | Mitchell Energy Company L.P. only | Columbus ( 6-C, South) | Colorado | 1 | 5.72K | 446K | Jul 1994 – Aug 2001 |
| Kainer O-2-8278 | Dove Petroleum Inc only | Labus (Austin) | Karnes | 1 | 5.66K | 12.1K | May 1997 – Nov 2005 |
| Hastedt, Emma "B" O-3-23195 | Hilcorp Energy Company only | Columbus ( 5-D S) | Colorado | 1 | 5.6K | 26.3K | Apr 1997 – Aug 1998 |
| Forman O-13-30012 | Encana Oil & Gas(usa) Inc. only | Barnabus (Mississippian) | Wise | 1 | 5.59K | 234K | Mar 2001 – May 2006 |
| Mmbc-920 O-8-21352 | Powell-McCarroll Partnership only | Bush Knob (Caddo, Lower) | Throckmorton | 1 | 5.58K | 9.15K | by Jan 1993 – Mar 2008 |
| Rancho Blanco G-4-159455 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 5.55K | 1.54M | Jun 1996 – Jun 2019 |
| Busch O-14-6824 | Kile Production only | Perryton, West (Cleveland) | Ochiltree | 1 | 5.53K | 1.82K | Feb 1993 – Dec 2002 |
| Brockenbush "A" O-1-2894 | Jet-Tex Oil & Gas, LLC only | Minerva-Rockdale | Milam | 7 | 5.52K | 21 | by Jan 1993 – Jul 2017 |
| Columbus Field Unit G-3-179740 | Devon Energy Operating Co., L.P. only | Columbus (Consolidated) | Colorado | 1 | 5.49K | 94.4K | Aug 2000 – Apr 2002 |
| Busby, Annie O-6-4783 | Shore Production Co. only | Henderson (Rusk Co. Travis Peak) | Rusk | 1 | 5.43K | 258K | by Jan 1993 – Nov 2002 |
| Bussard G-14-118897 | Lease Holders Acquisitions LLC only | Glazier (Morrow Upper) | Hemphill | 1 | 5.37K | 912K | by Jan 1993 – Dec 2018 |
| Turner Properties-Tommy Hendry O-9-7879 | Bustamante Oil Company only | Jameson (Strawn) | Coke | 1 | 5.35K | 157K | by Jan 1993 – Aug 2026 |
| Alexander, Charles G-4-164657 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 5.3K | 1.29M | Aug 1997 – Aug 2026 |
| Benavides Tract 4 G-4-119703 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 5.29K | 1.72M | by Jan 1993 – Jun 2019 |
| Hubberd, William "C2" G-4-196175 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 5.26K | 1.07M | Apr 2003 – Jul 2017 |
| Clark, N. H. G-4-167531 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 5.17K | 1.26M | Feb 1998 – Aug 2026 |
| Clark-Hereford G-4-175603 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 5.15K | 2.84M | Jan 2000 – Aug 2026 |
| Hubberd G-4-185875 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 5.14K | 3.48M | Oct 2001 – Aug 2026 |
| Clark-Hereford G-4-175365 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 5.13K | 1.93M | Dec 1999 – Aug 2026 |
| Schwarz G-4-73863 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 5.12K | 2.1M | by Jan 1993 – Sep 2017 |
| Atlantic Fee -B- O-10-16471 | Bustos, Martin Oil only | Brown & Thorp, N. (Clear Fork) | Pecos | 1 | 5.11K | 26 | by Jan 1993 – Dec 2002 |
| Busey-Gast Unit G-13-261257 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 5.07K | 268K | Mar 2011 – Apr 2019 |
| Haubold "B" O-13-30007 | Burlington Resources O & G Co LP only | Barnabus (Mississippian) | Cooke | 1 | 5.07K | 192K | Apr 2001 – Mar 2009 |
| Hachar, D.D. G-4-155910 | Columbus Energy, LLC only | Clark Ranch (Lobo) | Webb | 1 | 5.06K | 956K | Oct 1995 – Feb 2021 |
| Hubberd G-4-155149 | Columbus Energy, LLC only | Liz (8100) | Webb | 1 | 5.04K | 2.24M | Aug 1995 – Aug 2026 |