| Canon 62 G-10-112024 | Leonard Brothers Operating Co. only | Yucca Butte, W. (Ellen) | Pecos | 1 | 65.6K | 2.62M | Jun 1993 – Jan 2020 |
| Herring, Leonard G-6-97487 | Southwest Operating, Inc.-Tyler only | Quitman, NE. (Hill) | Wood | 1 | 40.5K | 426K | by Jan 1993 – Aug 2026 |
| Amacker Trust 36 G-9-207336 | R2Q Operating LLC only | Tippett (Leonard, Lower) | Crockett | 1 | 20.8K | 314K | Oct 2004 – Aug 2026 |
| Price, Ruth Mary -B- G-10-48042 | Darkens Oil & Gas Inc. only | El Cinco (Leonard, Lower) | Pecos | 1 | 20.1K | 546K | by Jan 1993 – Aug 2026 |
| Price, Ruth Mary -C- G-10-186740 | Darkens Oil & Gas Inc. only | El Cinco (Leonard, Lower) | Pecos | 1 | 19.4K | 492K | Nov 2001 – Aug 2026 |
| Canon "63" B G-10-111560 | Leonard Brothers Operating Co. only | Yucca Butte, W. (Ellen) | Pecos | 1 | 18.9K | 211K | by Jan 1993 – Jul 2018 |
| Leonard, William M. G-6-116785 | Faulconer Energy, LLC only | Rosewood (Cotton Valley) | Upshur | 1 | 14.3K | 1.06M | by Jan 1993 – Aug 2026 |
| Canon "63" A G-10-109500 | Leonard Brothers Operating Co. only | Yucca Butte, W. (Ellen) | Pecos | 1 | 13.7K | 77.5K | Jan 2004 – Apr 2018 |
| Cannon "63" G-10-138902 | Leonard Brothers Operating Co. only | Yucca Butte, W. (Ellen) | Pecos | 1 | 10.8K | 48.8K | by Jan 1993 – Jan 2020 |
| Leonard, William M. G-6-93300 | Faulconer Energy, LLC only | Rosewood (Cotton Valley) | Upshur | 1 | 10.2K | 757K | by Jan 1993 – Aug 2026 |
| Leonardo-Gutierrez Gas Unit G-4-162158 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 8.35K | 2.71M | Feb 1997 – Jan 2006 |
| Haynes, Leonard G-4-130482 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 6.99K | 7.34M | by Jan 1993 – Aug 2026 |
| Leonardo G-4-158464 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 6.18K | 5.92M | Apr 1996 – Aug 2026 |
| Leonardo G-4-179225 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 5.61K | 3.7M | Sep 2000 – Aug 2026 |
| Haynes, Leonard G-4-179299 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 4.9K | 2.53M | Sep 2000 – Aug 2026 |
| Mayer 36 G-9-279525 | Upp Operating, LLC only | Sawyer (Leonard) | Sutton | 1 | 4.42K | 24.2K | Mar 2014 – Jul 2026 |
| Haynes, Leonard G-4-117516 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 4.28K | 3.94M | by Jan 1993 – Aug 2026 |
| Leonardo G-4-165569 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 3.95K | 3.61M | Oct 1997 – Aug 2026 |
| Leonardo G-4-204423 | Hilcorp Energy Company only | Charco (9900) | Zapata | 1 | 3.51K | 1.92M | Sep 2004 – Aug 2026 |
| Haynes, Leonard G-4-127932 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 3.48K | 3.3M | by Jan 1993 – Aug 2026 |
| Haynes, Leonard G-4-185373 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 2.77K | 1.44M | Oct 2001 – Aug 2026 |
| Leonard, William M. G-6-203183 | Faulconer Energy, LLC only | Rosewood (Cotton Valley) | Upshur | 1 | 2.65K | 230K | Jun 2004 – Aug 2026 |
| Leonardo G-4-199638 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 2.62K | 4.53M | Nov 2003 – Aug 2026 |
| Leonardo G-4-180033 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 2.53K | 2.03M | Nov 2000 – Aug 2026 |
| Leonardo G-4-165193 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 2.52K | 8.58M | Oct 1997 – Aug 2026 |
| Leonard G-9-256164 | BMW Services, LLC only | Ballinger, SE. (Fry) | Runnels | 1 | 2.37K | 155K | Dec 2009 – Aug 2026 |
| Haynes, Leonard G-4-136855 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 2.14K | 2.68M | by Jan 1993 – Aug 2026 |
| Haynes, Leonard G-4-133456 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 2.1K | 1.72M | by Jan 1993 – Aug 2026 |
| Leonardo G-4-181151 | Hilcorp Energy Company only | Charco (9900) | Zapata | 1 | 2.05K | 1.39M | Dec 2000 – Aug 2026 |
| Haynes, Leonard G-4-165490 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 1.94K | 1.63M | Nov 1997 – Feb 2016 |
| Leonardo G-4-179884 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 1.76K | 2.84M | Oct 2000 – Aug 2026 |
| Canon Allison 84 G-10-121624 | Leonard Brothers Operating Co. only | Sheffield, SW. (Strawn) | Pecos | 1 | 1.6K | 914K | by Jan 1993 – Sep 2014 |
| Leonardo G-4-166973 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 1.51K | 3.85M | Feb 1998 – Aug 2026 |
| Leonardo G-4-87817 | Hilcorp Energy Company only | Charco (9400) | Zapata | 1 | 1.44K | 1.26M | by Jan 1993 – Aug 2026 |
| Tippett -36- G-9-57773 | Shell Western E&P Inc. only | Tippett (Leonard, Lower) | Crockett | 1 | 1.43K | 113K | by Jan 1993 – Feb 1996 |
| Leonardo G-4-121970 | Houston Exploration Company, The only | Charco (9200) | Zapata | 1 | 1.38K | 1.36M | by Jan 1993 – Apr 1998 |
| Leonardo G-4-233231 | Hilcorp Energy Company only | Charco (9900) | Zapata | 1 | 1.36K | 451K | Dec 2007 – Aug 2026 |
| Mayer , Edwin S. Jr. 'I' G-9-265937 | Upp Operating, LLC only | Sawyer (Leonard) | Schleicher | 1 | 1.35K | 256K | Aug 2012 – Jul 2026 |
| Deberry "A" G-9-290059 | Upp Operating, LLC only | Sawyer (Leonard) | Sutton | 1 | 1.34K | 577 | Feb 2020 – Jan 2022 |
| Haynes, Leonard G-4-136857 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 1.31K | 822K | by Jan 1993 – Aug 2026 |
| Allied-Waldo -83- G-10-284037 | Leonard Brothers Operating Co. only | Sheffield, SW. (Strawn) | Pecos | 1 | 1.22K | 2.44K | Aug 2017 – Oct 2019 |
| Leonard GU G-4-171550 | Merit Energy Company only | Jeffress, NE. (Vicksburg, Lo.) | Hidalgo | 1 | 1.18K | 832K | Aug 1998 – Aug 2026 |
| Haynes, Leonard G-4-180408 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 1.11K | 2.82M | Dec 2000 – Aug 2026 |
| Haynes, Leonard G-4-167548 | Merit Energy Company only | Los Mogotes (Wilcox Cons.) | Zapata | 1 | 1.04K | 4.78M | Apr 1998 – Aug 2026 |
| Leonardo G-4-181737 | Hilcorp Energy Company only | Charco (9900) | Zapata | 1 | 1.03K | 6.43M | Dec 2000 – Aug 2026 |
| Kirby 1 G-9-290030 | Upp Operating, LLC only | Sawyer (Leonard) | Sutton | 1 | 960 | 260 | Mar 2020 – May 2022 |
| Haynes, Leonard G-4-164984 | Hunt, Wm. Herbert, Trust Est. only | Charco (9900) | Zapata | 1 | 955 | 106K | Oct 1997 – Jun 1998 |
| Leonardo G-4-164795 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 915 | 1.17M | Sep 1997 – Jul 2026 |
| Leonardo G-4-242173 | Hilcorp Energy Company only | Charco (9400) | Zapata | 1 | 891 | 979K | Jun 2008 – Aug 2026 |
| Leonardo G-4-123375 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 876 | 3.48M | by Jan 1993 – Aug 2026 |