| Dyer "2988" G-8-97136 | Van Operating, Ltd. only | Callahan, NE (Congl) | Callahan | 1 | 8.94K | 1.29M | by Jan 1993 – Sep 2015 |
| McAllen, A. A. G-4-114060 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 8.85K | 161K | by Jan 1993 – May 2017 |
| McAllen, A. A. G-4-92095 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 8.85K | 1.42M | by Jan 1993 – Aug 2026 |
| Callihan, M. W. -C- O-1-13294 | Meb, LLC only | Luling-Branyon | Caldwell | 1 | 8.83K | 5.87K | by Jan 1993 – Aug 2026 |
| South Callaghan Ranch G-4-231996 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 8.82K | 1.49M | Oct 2007 – Aug 2026 |
| McAllen, A. A. G-4-130342 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 8.81K | 252K | Jul 2000 – Aug 2026 |
| Callow 2 Unit G-6-154786 | Tanos Exploration II, LLC only | Carthage (Cotton Valley) | Panola | 1 | 8.8K | 1.2M | May 1995 – Jul 2014 |
| Davison 6 O-8-27600 | Nosivad Oil, Inc. only | Callahan County Regular | Callahan | 1 | 8.71K | 0 | Jun 1995 – Oct 2011 |
| Jack Reese O-8-30817 | D.J. & T. Energy only | Callahan County Regular | Callahan | 2 | 8.7K | 0 | Aug 2011 – Mar 2025 |
| Williams, R. D. O-8-411 | Dark Canyon Resources LLC only | Callahan County Regular | Callahan | 7 | 8.57K | 20 | by Jan 1993 – May 2024 |
| McCall -A- O-13-16451 | Ipr Energy Partners, L.P. only | H-H(conglomerate) | Montague | 1 | 8.56K | 809 | by Jan 1993 – Jun 2008 |
| McAllen, A. A. "B" G-4-204249 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 8.54K | 751K | Aug 2004 – Jan 2008 |
| Guerra, A. E. G-4-114455 | Chevron U. S. A. Inc. only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 8.5K | 839K | by Jan 1993 – Oct 1994 |
| South Callaghan Ranch G-4-246195 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 8.49K | 1.23M | Jul 2008 – Aug 2026 |
| Call O-4-12005 | Shoreline Production Serv., Inc. only | White Point, East (State) | Nueces | 1 | 8.47K | 15.4K | by Jan 1993 – Feb 1997 |
| McAllen, A. A. "A" G-4-117877 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L) | Hidalgo | 1 | 8.36K | 481K | by Jan 1993 – May 1994 |
| West McAllen G-4-155005 | Fina Oil & Chemical Company only | McAllen, West (Card) | Hidalgo | 1 | 8.28K | 1.92M | Dec 1994 – May 1996 |
| Callihan, Dorothy O-1-5390 | Merkin LLC only | Luling-Branyon | Caldwell | 4 | 8.27K | 20 | by Jan 1993 – Aug 2026 |
| Calloway O-13-29214 | Felderhoff Production Company only | Tioga, East (Degan Sand) | Grayson | 1 | 8.25K | 0 | Oct 1996 – Feb 2022 |
| Isenhower, John D. O-8-450 | Clausen, A. G. only | Callahan County Regular | Callahan | 7 | 8.25K | 37 | by Jan 1993 – Aug 2026 |
| Williams, R. D. O-8-10147 | Sweet Texas T Energy LLC only | Callahan County Regular | Callahan | 7 | 8.24K | 20 | by Jan 1993 – Feb 2014 |
| Christian, Woods G-4-151442 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 8.17K | 79.4K | Oct 1994 – Apr 1996 |
| Pharr Fieldwide Unit G-4-136448 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 8.16K | 1.23M | by Jan 1993 – May 2017 |
| Pharr Fieldwide Unit G-4-157409 | Totalfinaelf E&P USA Inc only | McAllen (Hansen) | Hidalgo | 1 | 8.15K | 1.01M | Sep 1995 – Dec 2001 |
| South Callaghan Ranch G-4-247143 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 8.03K | 1.05M | May 2008 – Aug 2026 |
| McAllen Fieldwide Unit G-4-176575 | Totalfinaelf E&P USA Inc only | McAllen (Bond) | Hidalgo | 1 | 8.03K | 665K | Jun 1999 – Jan 2001 |
| Pharr Fieldwide Unit G-4-267004 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 8.03K | 770K | Feb 2012 – Aug 2026 |
| South Callaghan Ranch G-4-253923 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 8.01K | 1.14M | Oct 2009 – Aug 2026 |
| McAllen Fieldwide Unit G-4-11933 | OXY USA Inc. only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 7.99K | 2.18M | by Jan 1993 – Jun 2011 |
| McAllen, A. A. G-4-242307 | Hilcorp Energy Company only | McAllen Ranch (Vicksburg Y) | Hidalgo | 1 | 7.94K | 149K | Aug 2008 – Mar 2009 |
| Simmons G-8-214933 | US. Fuels, Inc. only | Callahan County Regular (Gas) | Callahan | 1 | 7.89K | 73.6K | Dec 2005 – May 2016 |
| Flores, Jack O-8-11014 | TCS Petroleum Co., LLC only | Callahan County Regular | Callahan | 3 | 7.88K | 0 | Mar 1996 – Aug 2026 |
| McAllen, A. A. G-4-184859 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 7.87K | 156K | Aug 2001 – May 2017 |
| McAllen, A. A. G-4-101373 | Fina Oil & Chemical Company only | McAllen Ranch(vicksburg-U-V-,se) | Hidalgo | 1 | 7.86K | 874K | by Jan 1993 – Oct 1994 |
| Beaurline, A. W. G-4-173858 | Gn&j LLC only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 7.86K | 1.43M | Jun 1999 – Feb 2023 |
| South Callaghan Ranch G-4-240278 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 7.82K | 1.04M | May 2008 – Aug 2026 |
| Arrowood, W. A. O-8-319 | Wilson Well Service Inc. only | Callahan County Regular | Callahan | 22 | 7.79K | 30 | by Jan 1993 – Aug 2026 |
| Callow 2 Unit G-6-160495 | Diversified Production LLC only | Carthage (Cotton Valley) | Panola | 1 | 7.74K | 1.25M | Oct 1996 – Aug 2026 |
| South Callaghan Ranch G-4-229004 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 7.72K | 1.28M | Jul 2007 – Aug 2026 |
| McAllister G-14-248357 | Presidio Petroleum LLC only | Lister (Granite Wash) | Wheeler | 1 | 7.72K | 688K | Sep 2007 – Apr 2019 |
| Beaurline, A.W. G-4-162746 | Cabot Oil & Gas Corporation only | McAllen Ranch (Vksbg. S-T-U, N.) | Hidalgo | 1 | 7.72K | 4.07M | Mar 1997 – Aug 1998 |
| Rio National Bank G-4-154511 | American Exploration Company only | McAllen (6900) | Hidalgo | 1 | 7.72K | 1.58M | Feb 1995 – Oct 1996 |
| Millham, Wm., et Al O-13-2277 | WLH Production LLC only | Callisburg, SW. (Strawn 3300) | Cooke | 1 | 7.69K | 21 | by Jan 1993 – Jul 2026 |
| Williams, Louie "B" O-8-11682 | TX (Georgia) Holdings, Inc. only | Callahan County Regular | Callahan | 21 | 7.69K | 81 | by Jan 1993 – Dec 2007 |
| Callison G-6-243290 | Enpower Resources Inc. only | Bethany (Travis Peak Cons.) | Harrison | 1 | 7.64K | 233K | Oct 2008 – Jul 2025 |
| Dyer "2988" O-8-21128 | Van Operating, Ltd. only | Callahan, NE (Congl) | Callahan | 1 | 7.64K | 132K | by Jan 1993 – Dec 1998 |
| Weyerhaeuser G-4-151527 | American Exploration Company only | McAllen, West (Card) | Hidalgo | 1 | 7.56K | 1.76M | Jun 1994 – Apr 1996 |
| Cauthen, J. D. et UX O-8-19335 | Interstate Explorations LLC only | Callahan County Regular | Callahan | 2 | 7.51K | 20.5K | by Jan 1993 – May 2023 |
| Johnson, H. H. O-10-36287 | Callon (Permian) LLC only | MI Vida (Delaware 4400) | Reeves | 1 | 7.49K | 171K | Jan 2000 – Dec 2019 |
| Guerra, A. E. G-4-180100 | Hilcorp Energy Company only | McAllen Ranch (Guerra) | Hidalgo | 1 | 7.45K | 909K | Jul 2000 – Sep 2006 |