| B & M Farms O-3-24518 | Viper S.W.D., LLC only | El Campo (6200) | Wharton | 1 | 27.6K | 13K | Mar 2004 – Jul 2010 |
| Nichols O-3-20357 | Ken Petroleum Corporation only | Daboval (7200) | Wharton | 1 | 27.5K | 868 | by Jan 1993 – Dec 1999 |
| Schumaker, Gene L. G-3-130538 | Faulconer, Vernon E., Inc. only | Ammann, West (Cook Mountain) | Wharton | 1 | 27.4K | 4.06M | by Jan 1993 – Oct 2015 |
| Cockburn, H.C. Deep Frio O.U. 1 O-3-19590 | KCS Resources, Inc. only | Magnet Withers (F-18B, East) | Wharton | 1 | 27.4K | 102K | by Jan 1993 – Jul 2007 |
| Swanson O-3-23499 | Pure Resources, L.P. only | Duke (Frio, Lo.) | Wharton | 1 | 27.4K | 58.6K | Jun 1998 – Nov 2000 |
| Peters, Gerd O-3-23346 | Howitzer Operating, LLC only | Hillje (F-18) | Wharton | 1 | 26.9K | 47.6K | Apr 1997 – Mar 2005 |
| Hancock G-3-170803 | Home Petroleum Corp. only | Egypt (Cook MTN) | Wharton | 1 | 26.8K | 1.62M | Feb 1998 – Aug 2026 |
| Monahan Gas Unit G-3-179977 | Sandridge Onshore, LLC only | Bonus, SW. (Wilcox) | Wharton | 1 | 26.7K | 1.26M | Sep 2000 – Dec 2007 |
| Mahalitc/Hunt G-3-177422 | Dominion Expl. & Prod., Inc. only | Bonus, SW. (Wilcox) | Wharton | 1 | 26.6K | 1.6M | May 2000 – Feb 2006 |
| Wendel-Rioux O-3-24492 | CML Exploration, LLC only | Wharton, West (4100) | Wharton | 1 | 26.6K | 0 | Jan 2004 – Dec 2016 |
| Jones, J. G-3-212075 | Forest Oil Corporation only | Phase Four (9560 Yegua) | Wharton | 1 | 26.3K | 648K | Oct 2004 – Jul 2008 |
| Weinheimer G-3-259092 | TMR Exploration, Inc. only | Alwan (Cook Mountain) | Wharton | 1 | 26.2K | 769K | Jul 2010 – Apr 2020 |
| Cockburn, H. C. G-3-242048 | Milagro Exploration, LLC only | Magnet Withers | Wharton | 1 | 26K | 34.6K | Jun 2007 – Sep 2008 |
| Cockburn Oil Unit O-3-20766 | Rodessa Operating Company only | Magnet Withers, E. (F-7) | Wharton | 1 | 26K | 2.71K | by Jan 1993 – Nov 1998 |
| Carolyn Lange G-3-283643 | MB Energy, LLC only | Phase Four (9050 Yegua) | Wharton | 1 | 25.9K | 589K | Jan 2018 – Apr 2024 |
| Forgason Deep Gas Unit G-3-213823 | Hilcorp Energy Company only | Dynamic (Wilcox 15,150) | Wharton | 1 | 25.7K | 5.45M | Aug 2005 – May 2011 |
| Carriere-Henderson G-3-133688 | Faulconer Energy, LLC only | Porter's Creek (Yegua) | Wharton | 1 | 25.6K | 4.14M | by Jan 1993 – Aug 2026 |
| Elam G-3-128378 | Hilcorp Energy Company only | El Campo (D-3 Yegua) | Wharton | 1 | 25.5K | 100K | by Jan 1993 – Oct 2005 |
| Weaver, Issac O-3-2818 | Magnum Producing, LP only | Louise | Wharton | 2 | 25.4K | 19 | Mar 1993 – Oct 2006 |
| Gold-Zapp G-3-124516 | Cox & Perkins Exploration, Inc. only | Phase Four (10500 Yegua) | Wharton | 1 | 25.4K | 958K | by Jan 1993 – Jul 1998 |
| Wintermann G-3-201733 | Proline Energy Resources Inc only | Bonus (Wilcox, Lower 12550) | Wharton | 1 | 25.4K | 867K | Apr 2004 – Aug 2026 |
| Waddell "A" G-3-148472 | M & S Exploration only | Duncan, S. (Yegua 6500) | Wharton | 1 | 25.2K | 98.2K | Feb 1994 – Jun 2012 |
| Kountze & Couch O-3-12504 | Petra Oleum Corp. only | Louise, South (Frio 5170) | Wharton | 1 | 25.1K | 5.75K | by Jan 1993 – Mar 2000 |
| Pierce Ranch G-3-242420 | CML Exploration, LLC only | Shanghai, E. (EY 10200) | Wharton | 1 | 24.8K | 433K | Jul 2008 – Aug 2021 |
| Mahalitc/Hunt G-3-177693 | Hilcorp Energy Company only | Bonus, SW. (Wilcox) | Wharton | 1 | 24.7K | 2.57M | Apr 2000 – Mar 2019 |
| Krenek Gas Unit G-3-182017 | Mountain V Texas, LLC only | Bonus, SW. (Wilcox) | Wharton | 1 | 24.7K | 1.24M | Mar 2001 – Jul 2026 |
| Duncan G-3-168092 | Faulconer, Vernon E., Inc. only | Egypt, N. (Cook MTN RA) | Wharton | 1 | 24.6K | 1.27M | Dec 1997 – Nov 2011 |
| Ferguson Oil Unit O-3-17062 | McGowan Working Partners, Inc. only | Pierce Ranch (4900) | Wharton | 1 | 24.3K | 28.7K | by Jan 1993 – Aug 2000 |
| Dressler O-3-21500 | Penwell Energy, Inc. only | Menefee (Frio 5500) | Wharton | 1 | 24.2K | 33 | by Jan 1993 – Oct 1995 |
| Stockton Gas Unit G-3-297146 | Viper S.W.D., LLC only | Menefee (Yegua EY 9850) | Wharton | 1 | 24.2K | 793K | Sep 2023 – May 2026 |
| Duson G-3-133773 | Howell Petroleum Corporation only | Shanghai (D-3) | Wharton | 1 | 24.1K | 521K | by Jan 1993 – Feb 1995 |
| E.A. Weinheimer-Grady Trust Unit G-3-139930 | Crimson Exploration Inc. only | Alwan (Cook Mountain) | Wharton | 1 | 24.1K | 534K | Jun 1993 – Mar 2005 |
| Armour Trust, et Al G-3-279821 | Hilcorp Energy Company only | Phase Four (9560 Yegua) | Wharton | 1 | 23.8K | 436K | May 2015 – Jan 2017 |
| Cockburn, H. C. O-3-20468 | Exxon Mobil Corporation only | Magnet Withers (F-5) | Wharton | 1 | 23.7K | 15.4K | by Jan 1993 – Apr 1999 |
| Koch, E. H. Estate O-3-2822 | Acoma Oil Corporation only | Louise, N. (Duson Sand) | Wharton | 1 | 23.4K | 21 | by Jan 1993 – Oct 2008 |
| Cockburn, H. C. G-3-219134 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 23.3K | 197K | Jun 2006 – Dec 2013 |
| Floyd, Belle M. O-3-541 | Davis, C. O. Production Co. only | Boling | Wharton | 10 | 23.3K | 89 | by Jan 1993 – Aug 2012 |
| Jones "A" O-3-18833 | Fredco only | Louise, South (Frio 5450) | Wharton | 1 | 23.2K | 45 | by Jan 1993 – Jun 2024 |
| Halamicek, J. A. et al Unit G-3-132532 | Faulconer Energy, LLC only | Porter's Creek (Yegua) | Wharton | 1 | 23.1K | 2.67M | by Jan 1993 – Aug 2026 |
| Stovall, Guy F. Trust G-3-149968 | Viper S.W.D., LLC only | Mott Slough (Yegua) | Wharton | 1 | 23.1K | 441K | Jun 1994 – Sep 2022 |
| T. & N.O. RR Company O-3-522 | Boling Production Company, Inc. only | Boling | Wharton | 3 | 22.9K | 139 | by Jan 1993 – Aug 2026 |
| Hancher O-3-20373 | Legacy Operating Company, LLC only | Louise, South (Frio 5170) | Wharton | 1 | 22.9K | 49 | by Jan 1993 – Dec 1998 |
| South Texas Land, et Al O-3-26520 | Finaly Resources LLC only | Holub (5600) | Wharton | 1 | 22.8K | 79.4K | Aug 2013 – Dec 2018 |
| Forgason Deep G.U. G-3-191841 | Hilcorp Energy Company only | Dynamic (Wilcox 15,150) | Wharton | 1 | 22.5K | 11.4M | Aug 2002 – Aug 2026 |
| Rasmussen G-3-132300 | Wagner Oil Company only | Bruce Roy (Yegua) | Wharton | 1 | 22.5K | 2.43M | by Jan 1993 – Aug 2026 |
| Adamcik G-3-271133 | Atlas Operating LLC only | Black Owl (Yegua 8300) | Wharton | 1 | 22.5K | 2.78M | Aug 2013 – Aug 2026 |
| Julius G-3-273902 | Ricochet Energy, Inc. only | Phase Four (9050 Yegua) | Wharton | 1 | 22.3K | 168K | Feb 2014 – Nov 2015 |
| Cockburn, H.C. G-3-273703 | Orx Resources, L.L.C. only | Magnet Withers (Frio Cons.) | Wharton | 1 | 22.1K | 49.2K | Sep 2014 – Dec 2022 |
| Gary, J.B. et al "E" O-3-18789 | Tuskar (Texas), Inc. only | Boling, South | Wharton | 1 | 22K | 21 | by Jan 1993 – May 2014 |
| Russell O-3-25580 | Amexco, LLC only | Hutchins-Kubela (Frio 4380) | Wharton | 1 | 21.7K | 14.8K | Oct 2010 – Jul 2019 |