| 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 | 4.37M | Apr 1993 – Aug 2026 |
| Hubberd, William A G-4-167287 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 24.9K | 2.96M | Feb 1998 – Aug 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 | 6.23M | Jul 1993 – Aug 2026 |
| Martinez, D.S. G-4-168891 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 24.2K | 2.87M | Feb 1998 – Aug 2026 |
| Bussey G-13-257404 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Parker | 1 | 24.1K | 1.59M | Jun 2010 – Aug 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 |
| Davis "B" Unit G-3-139584 | Columbus Energy Corp. only | Sralla Road (Jackson 9050) | Harris | 1 | 23.8K | 2.41M | by Jan 1993 – Apr 2001 |
| Bush et Al O-11-61335 | WMS Oil Company only | Three Way (Strawn) | Garza | 2 | 23.8K | 1.75K | by Jan 1993 – Jun 2004 |
| Hamlett O-11-68934 | Bustamante Resources LLC only | Tex Shaheen (Upper Canyon Reef) | Scurry | 1 | 23.7K | 0 | May 2006 – Aug 2026 |
| Columbus Field Unit O-3-20372 | Devon Energy Operating Co., L.P. only | Columbus (5-C) | Colorado | 2 | 23.7K | 57.7K | by Jan 1993 – Aug 2001 |
| Bush-Stetz Unit O-3-21694 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 23.7K | 206K | by Jan 1993 – Feb 2000 |
| Lindholm C S Gas Unit G-1-144622 | Columbus Energy, LLC only | Rhode (10,600 Wilcox) | McMullen | 1 | 23.6K | 1.31M | by Jan 1993 – Aug 2026 |
| Karon Luling Unit G-2-153674 | Columbus Energy, LLC only | Karon (Luling) | Live Oak | 1 | 23.5K | 2.04M | Jan 1995 – Mar 2016 |
| Dorado O-8-26962 | Bustamante Oil Company only | Sedona (Hope Lime) | Jones | 2 | 23.3K | 360 | Jul 1993 – Jul 2021 |
| Trust Buster O-10-57236 | Mewbourne Oil Company only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 23.2K | 218K | Feb 2022 – Aug 2026 |
| Buster O-10-38601 | Baker Operating, Inc. only | Goldsmith, W. (San Andres) | Ector | 2 | 23.2K | 133K | Feb 2008 – Aug 2026 |
| Ruth G. Palmer O-10-33634 | Bustamante Oil Company only | Foster | Ector | 1 | 23.2K | 7.19K | by Jan 1993 – Aug 2026 |
| Hastedt, Emma O-3-24057 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 23.1K | 40.3K | Sep 2001 – Jan 2017 |
| Prevost G-4-163524 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 22.9K | 1.5M | Apr 1997 – Aug 2026 |
| Hubberd, William C 3 G-4-146666 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 22K | 5.18M | Sep 1993 – Aug 2026 |
| Bussey, Jonnie G-6-86300 | Cook Exploration Co. only | Lansing, N. (Cotton Valley, Lo.) | Harrison | 1 | 22K | 1.34M | by Jan 1993 – Aug 2026 |
| Columbus Field Unit O-3-20702 | Devon Energy Operating Co., L.P. only | Columbus (11-D) | Colorado | 3 | 21.8K | 158K | by Jan 1993 – Aug 2001 |
| Lindholm, R. G. G-1-112584 | Columbus Energy, LLC only | Rhode (10,600 Wilcox) | McMullen | 1 | 21.8K | 3.15M | by Jan 1993 – Aug 2026 |
| McLemore A-232 O-8-28880 | Unit Petroleum Company only | Big Bussy (Caddo, Upper) | Shackelford | 1 | 21.2K | 13.5K | Oct 2000 – Apr 2003 |
| Cullen, H. R. et Al G-3-166592 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 21.2K | 946K | Nov 1997 – Jun 2018 |
| Hubberd T G-4-167093 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 20.9K | 1.72M | Feb 1998 – Aug 2026 |
| Bush, E. M. O-1-2455 | Petro Lions, LLC only | Somerset | Atascosa | 6 | 20.9K | 21 | by Jan 1993 – Aug 2026 |
| Cullen, H. R. et Al G-3-175095 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 20.9K | 895K | Nov 1999 – Aug 2026 |
| Alexander, Charles G-4-165680 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 20.8K | 4.36M | Nov 1997 – Aug 2026 |
| Bussey G-13-267286 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Parker | 1 | 20.7K | 1.66M | Jun 2012 – Aug 2026 |
| Bush-Wofford "A" O-4-11676 | Urban Oil & Gas Group, LLC only | Agua Dulce | Nueces | 2 | 20.6K | 150K | by Jan 1993 – Jul 2026 |
| Cal-Mex G-4-66404 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 20.5K | 7.62M | by Jan 1993 – Aug 2026 |
| Bussey G-13-230534 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 20.5K | 2M | Mar 2007 – Nov 2024 |
| Columbus Field Unit G-3-129021 | Mitchell Energy Company L.P. only | Columbus | Colorado | 1 | 20.5K | 1.8M | by Jan 1993 – Aug 2001 |
| McKendrick, W. H. G-4-165417 | Columbus Energy, LLC only | Laredo (8080) | Webb | 1 | 20.5K | 4.39M | Nov 1997 – Aug 2026 |
| McKendrick-Akin G-4-179590 | Columbus Energy, LLC only | Volz (Lobo) | Webb | 1 | 20.4K | 3.74M | Aug 2000 – Aug 2026 |
| Waitkus "B" Unit O-3-23391 | Columbus Energy Corp. only | Sralla Road (Jackson, W.) | Harris | 1 | 20.3K | 294K | Jan 1998 – Sep 2003 |
| Settle O-13-30008 | EOG Resources, Inc. only | Barnabus (Mississippian) | Cooke | 1 | 20.3K | 183K | Jun 2001 – Dec 2009 |
| Cullen-Hastedt G-3-282321 | Strand Energy, L.C. only | Columbus (Consolidated) | Colorado | 1 | 20.2K | 802K | Jun 2017 – Aug 2026 |
| Bush, Edith Smith O-2-7059 | Staples, James W. Prod. Co. only | San Domingo, S. (3100 Sd.) | Bee | 2 | 20K | 38.1K | by Jan 1993 – Aug 2026 |
| Bush Brothers O-5-4436 | Kilmarnock Oil Company, Inc. only | Powell | Navarro | 1 | 19.9K | 0 | Oct 2021 – Aug 2026 |
| Columbus Field Unit G-3-171256 | Devon Energy Production Co, L.P. only | Columbus (Consolidated) | Colorado | 1 | 19.9K | 745K | Sep 1998 – Sep 2006 |
| Winterbotham "41" O-9-13327 | Bustamante Oil Company only | Brooks (Canyon K) | Irion | 1 | 19.8K | 220K | by Jan 1993 – Aug 2026 |
| Patterson, Buster & Dorothy O-2-7452 | Wallis Energy, Inc. only | Singleton, East (4020) | Bee | 1 | 19.7K | 111 | by Jan 1993 – Jun 2026 |
| Winterbotham "41" O-9-12670 | Bustamante Oil Company only | Velrex (Henderson Upper) | Irion | 1 | 19.7K | 137K | by Jan 1993 – Aug 2026 |
| McKendrick, W.H. G-4-151205 | Columbus Energy, LLC only | Hereford (Lobo) | Webb | 1 | 19.7K | 2.58M | Sep 1994 – Jul 2006 |
| Columbus Field Unit G-3-164037 | Rusk Energy Operating LLC only | Columbus (Consolidated) | Colorado | 1 | 19.6K | 823K | Aug 1997 – Oct 2004 |