| Ross,a.c. "110" G-8-114921 | Bacon Energy only | Callahan County Regular (Gas) | Callahan | 1 | 4.09K | 261K | May 1993 – Feb 2012 |
| South Callaghan Ranch G-4-161287 | Aldine Oil and Gas, LP only | Brettchance (Lobo 1) | Webb | 1 | 4.09K | 2.66M | Sep 1996 – Aug 2026 |
| Dudley South Unit O-8-12394 | Jones, Jansen M. only | Callahan County Regular | Callahan | 11 | 4.06K | 21 | by Jan 1993 – Nov 1995 |
| McFarlane, J.W. O-8-25540 | Cwo Energy, LLC only | Callahan County Regular | Callahan | 3 | 4.04K | 21 | by Jan 1993 – Jul 2017 |
| Callaghan Ranch G-4-172866 | Hilcorp Energy Company only | Finley-Webb (Upper Cons) | Webb | 1 | 4.02K | 1.16M | Apr 1999 – Jul 2015 |
| Callway a "34" O-10-56875 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 3.98K | 937 | Mar 2022 – Apr 2024 |
| South Callaghan Ranch G-4-221165 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.98K | 1.73M | May 2006 – Aug 2026 |
| Guerra, A.E. G-4-251192 | Chevron U. S. A. Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 3.93K | 326K | Mar 2009 – Dec 2010 |
| Macdonald O-8-26030 | Whitehead Prod. Co., Inc. only | Callahan County Regular | Callahan | 1 | 3.93K | 3.6K | by Jan 1993 – Aug 1994 |
| Callihan, W. M. -C- O-1-1052 | Castillo Oil Company LLC only | Luling-Branyon | Caldwell | 3 | 3.92K | 217 | by Jan 1993 – Jul 2026 |
| Jackson, Elma O-8-502 | Abernathy Auto, Inc. only | Callahan County Regular | Callahan | 26 | 3.89K | 22 | by Jan 1993 – Sep 2002 |
| South Callaghan Ranch G-4-225094 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.86K | 1.33M | Feb 2007 – Aug 2026 |
| Davis, J.L. Estate O-8-13338 | Low-End Oil LLC only | Callahan County Regular | Callahan | 6 | 3.85K | 14 | by Jan 1993 – Apr 2013 |
| McAllister North G-14-231203 | Presidio Petroleum LLC only | Lister (Granite Wash) | Wheeler | 1 | 3.79K | 831K | Jul 2007 – Aug 2026 |
| Callaghan Ranch G-4-205996 | Hilcorp Energy Company only | Finley-Webb (Lobo Cons) | Webb | 1 | 3.78K | 1.29M | Dec 2004 – Nov 2020 |
| Hill "B" G.U. G-4-128050 | Wynn-Crosby Energy, Inc. only | McAllen Ranch (Guerra, E.) | Hidalgo | 1 | 3.78K | 470K | by Jan 1993 – Dec 2003 |
| Pharr Fieldwide Unit G-4-241947 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.77K | 2.52M | Jun 2008 – Jul 2026 |
| Jackson, Elma O-8-11494 | Williams Deville Operating, Inc. only | Callahan County Regular | Callahan | 6 | 3.77K | 368 | by Jan 1993 – Apr 2018 |
| Pharr Fieldwide Unit G-4-212925 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.74K | 247K | Aug 2005 – Aug 2026 |
| Callow 2 Unit G-6-287100 | Diversified Production LLC only | Carthage (Pettit, Lower) | Panola | 1 | 3.64K | 169K | Jun 2018 – Aug 2026 |
| Beaurline, A. W. G-4-242047 | Gn&j LLC only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 3.61K | 260K | Mar 2008 – Aug 2019 |
| Pharr Fieldwide Unit G-4-268909 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.61K | 339K | Sep 2012 – Nov 2023 |
| Rio Bravo G-4-247908 | Kebo Oil & Gas, Inc. only | McAllen, South (E-1) | Hidalgo | 1 | 3.61K | 878K | Feb 2009 – Feb 2014 |
| McAllen, A. A. "Slot" G-4-114056 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 3.61K | 32.5K | by Jan 1993 – Oct 1994 |
| UL Bighorn B 21-30-19 O-10-53655 | Callon Permian II, LLC only | Phantom (Wolfcamp) | Winkler | 1 | 3.6K | 0 | Jan 2022 – Jan 2022 |
| Hinojosa, F. G. G-4-203744 | Sierra Resources, LLC only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 3.59K | 38.5K | May 2004 – Jul 2004 |
| McAllen, A. A. "B" G-4-200683 | OXY USA Inc. only | Los Indios, SW. (Frio 6000) | Hidalgo | 1 | 3.59K | 401K | Mar 2004 – Oct 2004 |
| Loving, P.B. O-8-13243 | Whitt Oil & Gas, Inc. only | Callahan County Regular | Callahan | 6 | 3.59K | 46 | by Jan 1993 – Dec 2008 |
| Watts, Callie G-13-235591 | Upp Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 3.58K | 1.16M | Sep 2007 – Jun 2026 |
| South Callaghan Ranch G-4-235032 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.55K | 371K | Dec 2007 – Apr 2012 |
| Williams, R. D. "A" O-8-478 | Diamond S Masada LLC only | Callahan County Regular | Callahan | 7 | 3.54K | 20 | by Jan 1993 – Mar 2009 |
| South Callaghan Ranch G-4-144337 | Aldine Oil and Gas, LP only | Small Cowboy (Lobo 6) | Webb | 1 | 3.54K | 3.07M | by Jan 1993 – Aug 2026 |
| Guerra, A. E. G-4-172654 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 3.54K | 557K | Mar 1999 – Nov 1999 |
| Mc Allen Fieldwide Unit G-4-45199 | Totalfinaelf E&P USA Inc only | McAllen (Hackney Lake North) | Hidalgo | 1 | 3.53K | 950K | by Jan 1993 – Dec 2001 |
| Longoria G-4-162608 | Bass Enterprises Production Co. only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 3.52K | 179K | Mar 1997 – Sep 1997 |
| Diller, Sam A. O-8-12496 | Sweet Texas T Energy LLC only | Callahan County Regular | Callahan | 3 | 3.52K | 8 | Apr 1993 – Jan 2018 |
| Hatfield O-13-27247 | Xstar Resources LLC only | Callendar (Weir) | Jack | 1 | 3.5K | 16 | by Jan 1993 – May 1997 |
| South Callaghan Ranch G-4-237497 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.49K | 448K | Apr 2008 – Aug 2026 |
| South Callaghan Ranch G-4-225685 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.47K | 618K | Feb 2007 – Aug 2026 |
| Guerra, A. E. G-4-177308 | Texaco E & P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 3.46K | 206K | Mar 2000 – Nov 2000 |
| McAllister North G-14-225526 | Presidio Petroleum LLC only | Lister (Granite Wash) | Wheeler | 1 | 3.42K | 731K | Dec 2006 – Aug 2026 |
| Pruett, W. E. O-8-439 | Sweet Texas T Energy LLC only | Callahan County Regular | Callahan | 10 | 3.42K | 20 | by Jan 1993 – Feb 2014 |
| McAllister G-14-223962 | Unit Petroleum Company only | Lister (Granite Wash) | Wheeler | 1 | 3.4K | 305K | Jun 2006 – Jan 2018 |
| Aero G-4-269982 | Kebo Oil & Gas, Inc. only | McAllen, South (L-2) | Hidalgo | 1 | 3.39K | 170K | May 2013 – Jun 2018 |
| South Callaghan Ranch G-4-230569 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.39K | 641K | Aug 2007 – Aug 2026 |
| Stacy, F. W. O-8-6715 | Cotula Oil & Gas Co., Inc. only | Callahan County Regular | Callahan | 6 | 3.38K | 30 | by Jan 1993 – Aug 2026 |
| South Callaghan Ranch G-4-253512 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.38K | 820K | Sep 2009 – Aug 2026 |
| Pharr Fieldwide Unit G-4-270146 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 3.38K | 295K | Apr 2013 – Jul 2026 |
| South Callaghan Ranch G-4-142539 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 3.36K | 2.47M | by Jan 1993 – Aug 2026 |
| McAllen Fieldwide Unit G-4-168750 | Total E&P USA, Inc. only | McAllen (Hansen) | Hidalgo | 1 | 3.29K | 820K | Oct 1997 – Aug 2000 |