| University #36-2 G-9-155506 | White Rock Oil & Gas, LLC only | Pakenham (Thrusted) | Terrell | 1 | 40.3K | 4.22M | Jun 1995 – Aug 2026 |
| Frost Trust 49 G-4-191043 | Hilcorp Energy Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 39.3K | 2.18M | Jul 2002 – Aug 2026 |
| Sabine Royalty Trust G-6-274787 | Eqv Operating LLC only | Carthage (Cotton Valley) | Panola | 1 | 39.2K | 4.02M | Mar 2014 – Aug 2026 |
| Boston Texas Land & Trust G-4-289878 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 39.1K | 2.72M | Mar 2020 – Aug 2026 |
| Boston Texas Land & Trust G-4-234064 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 39.1K | 1.25M | Dec 2007 – Aug 2026 |
| C-Bruni Mineral Trust G-4-146852 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 38.9K | 5.08M | Oct 1993 – Aug 2026 |
| Hager Trust 616 G-14-279071 | BE Anadarko II, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 38.7K | 412K | Feb 2015 – Aug 2026 |
| Boston Texas Land & Trust G-4-271191 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 38.5K | 2.38M | Nov 2013 – Aug 2026 |
| C-Bruni Mineral Trust G-4-152405 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38.3K | 5.63M | Oct 1994 – Aug 2026 |
| Martin Trust C G-14-272341 | Presidio Petroleum LLC only | St. Clair (Granite Wash) | Roberts | 1 | 38.2K | 142K | May 2013 – Mar 2022 |
| Flowers Trust "A" G-14-159628 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 38.2K | 1.37M | Jul 1996 – Aug 2026 |
| Hager Trust 616 G-14-280902 | BE Anadarko II, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 38.2K | 492K | Jan 2015 – Oct 2021 |
| C-Bruni Mineral Trust G-4-158139 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38K | 4.68M | Mar 1996 – Aug 2026 |
| C- Bruni Mineral Trust G-4-141443 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 38K | 6.3M | by Jan 1993 – Aug 2026 |
| University #36-2 G-9-160025 | White Rock Oil & Gas, LLC only | Pakenham (Thrusted) | Terrell | 1 | 38K | 1.85M | Aug 1996 – Aug 2026 |
| Dusek, F. J. Trust G-4-171579 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 38K | 2.67M | Nov 1998 – May 2024 |
| C-Bruni Mineral Trust G-4-143478 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 37.9K | 4.22M | by Jan 1993 – Aug 2026 |
| Boston Texas Land & Trust G-4-215084 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 37.5K | 2.5M | Dec 2005 – Aug 2026 |
| Blackwell Trust Gas Unit G-2-212281 | Mosley Oil &gas Inc only | Friar Ranch, S. (Consolidated) | De Witt | 1 | 36.6K | 591K | Jul 2005 – Apr 2022 |
| Schreiner Ranch Trust II G-2-141656 | Sandel Operating Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 36.6K | 913K | by Jan 1993 – Aug 2026 |
| Boston Texas Land & Trust G-4-229338 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 36.5K | 2.94M | Jun 2007 – Aug 2026 |
| Martin Trust G-14-265532 | BE Anadarko II, LLC only | Roberts Co. (St. Louis) | Roberts | 1 | 36.4K | 3.09M | Sep 2011 – Aug 2026 |
| Dusek, F. J. Trust G-4-171697 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 36.4K | 3.52M | Dec 1998 – Aug 2026 |
| Boston Texas Land & Trust G-4-284804 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 36K | 1.08M | Apr 2018 – Aug 2026 |
| Smith, Mary Carol Trust Unit G-1-119022 | Verdun Oil & Gas LLC only | Fashing (Edwards Lime -A-) | Atascosa | 1 | 35.7K | 2.98M | by Jan 1993 – Aug 2026 |
| Dusek, F. J. Trust G-4-175101 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 35.6K | 3.12M | Oct 1999 – Aug 2026 |
| Sabine Royalty Trust G-6-264815 | Eqv Operating LLC only | Carthage (Cotton Valley) | Panola | 1 | 35K | 2.64M | Feb 2012 – Aug 2026 |
| C-Bruni Mineral Trust G-4-154452 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 34.9K | 4.29M | May 1995 – Jun 2013 |
| C-Bruni Mineral Trust G-4-147608 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 34.6K | 4.28M | Dec 1993 – Aug 2026 |
| Huebner Trusts G-3-222737 | Red Wolf Oil Company, Inc. only | Huebner ( 9,960 S.) | Matagorda | 1 | 34.3K | 1.09M | Mar 2007 – Nov 2010 |
| Boston Texas Land & Trust G-4-97088 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 34.3K | 1.74M | by Jan 1993 – Aug 2019 |
| Dusek, F. J. Trust G-4-117878 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 34.1K | 1.6M | by Jan 1993 – May 2006 |
| Dusek, F. J. Trust G-4-172511 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 33.7K | 2M | Feb 1999 – Aug 2026 |
| Schreiner Ranch Trust No. 2 G-2-104214 | McCombs Energy, Ltd. only | Limes (Wilcox 9900) | Live Oak | 1 | 33.2K | 1.19M | by Jan 1993 – Mar 2008 |
| Baker Family Trust G-2-255356 | Burlington Resources O & G Co LP only | Sugarkane (Austin Chalk) | Live Oak | 1 | 33.1K | 348K | Nov 2008 – Feb 2014 |
| C-Bruni Mineral Trust G-4-147241 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 33K | 2.38M | Nov 1993 – Aug 2026 |
| Mitchell 9 G-9-155264 | OXY USA Inc. only | Pakenham (Thrusted) | Terrell | 1 | 32.9K | 2.76M | Jun 1995 – May 2017 |
| Young Trust G-14-261116 | Mmgl Txph, LLC only | Allison Parks (Granite Wash) | Hemphill | 1 | 32.8K | 4.85M | Jan 2011 – Aug 2026 |
| Ammann, Homer Trust G-3-131950 | Faulconer Energy, LLC only | McFarlan (Cook Mountain) | Wharton | 1 | 32.6K | 6.26M | by Jan 1993 – Aug 2026 |
| Jones Trust 272 G-14-276332 | BE Anadarko II, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 32.5K | 146K | Jun 2013 – Aug 2026 |
| Brown-Trusts G-1-271569 | BPX Operating Company only | Hawkville (Eagleford Shale) | La Salle | 1 | 32K | 1.16M | Sep 2013 – Aug 2026 |
| James Trust G-1-279005 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 31.9K | 4.18M | Jun 2015 – Aug 2026 |
| James Trust G-1-279148 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 31K | 3.74M | Jun 2015 – Aug 2026 |
| Boston Texas Land & Trust G-4-241000 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 30.6K | 2.83M | Jun 2008 – Aug 2026 |
| Flowers Trust 'B' G-14-268115 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 30.5K | 2.67M | Oct 2012 – Aug 2026 |
| Marshall Bros. Trust G. V. NO.1 G-3-82061 | Galloway Lone Star, L.L.C. only | Tomball, SE. (11700) | Harris | 1 | 30.4K | 1.6M | by Jan 1993 – Aug 2026 |
| Flowers Trust "B" G-14-255332 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 30.4K | 3.21M | Jan 2010 – Aug 2026 |
| C-Bruni Mineral Trust G-4-158097 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 30.1K | 3.97M | Mar 1996 – Aug 2026 |
| West Ranch G-10-128799 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 29.8K | 20.4M | by Jan 1993 – Mar 2024 |
| Flowers Trust "A" G-14-92572 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 29.8K | 777K | by Jan 1993 – Oct 2023 |