| Armour Trust, et Al G-3-279821 | Hilcorp Energy Company only | Phase Four (9560 Yegua) | Wharton | 1 | 23.8K | 436K | May 2015 – Jan 2017 |
| Bruni Mineral Trust "B" G-4-248708 | Hilcorp Energy Company only | Bashara-Hereford (7300) | Webb | 1 | 23.8K | 3.4M | Mar 2009 – Aug 2026 |
| James Trust G-1-279004 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 23.8K | 4.12M | Jun 2015 – Aug 2026 |
| Guaranty Title & Trust G-4-198135 | Pine Island Operating, L.L.C. only | Corpus Christi, W (Consolidated) | Nueces | 1 | 23.6K | 1.04M | Oct 2003 – Jun 2010 |
| Kincaid, A. R. Trust 'C' G-9-136766 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 23.4K | 1.33M | 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 |
| Cranz Trust G-3-165211 | Jamex, Inc. only | Chesterville, N. (Pack) | Colorado | 1 | 23.1K | 1.75M | Aug 1997 – Jul 2026 |
| Garza Zamora Energy Trust G-4-227373 | Merit Energy Company only | Flores (Vicksburg, Lower) | Hidalgo | 1 | 22.9K | 3.47M | May 2007 – Aug 2026 |
| Rust Unit G-3-294000 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 22.8K | 407K | Mar 2022 – Jul 2026 |
| Cranz Trust 834 G-3-217827 | Jamex, Inc. only | Rexville (Wilcox) | Austin | 1 | 22.7K | 2.27M | May 2006 – Jul 2026 |
| Matthews, Carroll P. Trust G-4-203577 | STS Petroleum LLC only | Agua Dulce (Vicksburg Consl.) | Nueces | 1 | 22.7K | 590K | Aug 2004 – Apr 2006 |
| Kincaid, A. R. Trust 'D' G-9-143658 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 22.5K | 1.12M | Feb 1993 – Aug 2026 |
| Tyrrell, W. C. Trust G-10-155385 | Chevron U. S. A. Inc. only | Gomez, NW. (Wolfcamp) | Pecos | 1 | 22.3K | 848K | Jul 1995 – Aug 2026 |
| Boston Texas Land & Trust G-4-286359 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 22.3K | 2.13M | Apr 2019 – Aug 2026 |
| Bruni Mineral Trust G-4-183083 | Hilcorp Energy Company only | Liz (9200) | Webb | 1 | 22.2K | 2.69M | May 2001 – Aug 2026 |
| C-Bruni Mineral Trust G-4-147615 | Hilcorp Energy Company only | La Perla (Lobo Cons.) | Webb | 1 | 22.1K | 7.67M | Nov 1993 – Aug 2026 |
| University 32 G-9-163548 | Hilcorp Energy Company only | Pakenham (Thrusted) | Terrell | 1 | 21.9K | 1.17M | Nov 1996 – Aug 2026 |
| Henderson Trust "NN" G-9-144200 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 21.9K | 890K | by Jan 1993 – Aug 2026 |
| Flowers Trust "A" G-14-254317 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 21.7K | 609K | Nov 2009 – Aug 2026 |
| Cole Trust Stony G-13-263966 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 21.7K | 2.05M | Aug 2011 – Aug 2026 |
| Schreiner Ranch Trust II G-2-234406 | Sandel Operating Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 21.7K | 566K | Apr 2008 – Aug 2026 |
| Dusek, F. J. Trust G-4-173860 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 21.6K | 1.36M | Jun 1999 – Aug 2026 |
| Boring, G W Trustee GU 6 (AW) G-13-300513 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 21.5K | 1.78M | Jun 2025 – Aug 2026 |
| Marshall Brothers Trust GU G-3-162216 | Galloway Lone Star, L.L.C. only | Tomball, SE. (11700) | Harris | 1 | 21.4K | 1.47M | Jan 1997 – Aug 2026 |
| Anderson Trust a Unit G-13-270698 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 21.3K | 807K | Nov 2010 – Aug 2026 |
| Tuttle Trust Gas Unit G-2-229494 | PA Prospect LLC only | Tom Long (Lower Wilcox) | Lavaca | 1 | 21.2K | 769K | Jul 2007 – Nov 2012 |
| Young Trust G-14-265606 | Mmgl Txph, LLC only | Allison Parks (Granite Wash) | Hemphill | 1 | 21.2K | 3.03M | Feb 2012 – Aug 2026 |
| James Trust G-1-279208 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 21K | 3.51M | Jun 2015 – Aug 2026 |
| Boston Texas Land & Trust G-4-237125 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 21K | 3.26M | Mar 2008 – Aug 2026 |
| Henderson Trust "NN" G-9-159757 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 21K | 555K | Aug 1996 – Aug 2026 |
| Amacker Trust 36 G-9-207336 | R2Q Operating LLC only | Tippett (Leonard, Lower) | Crockett | 1 | 20.8K | 314K | Oct 2004 – Aug 2026 |
| Black Trust 49 G-14-270376 | Unbridled Resources, LLC only | Frye Ranch (Consolidated) | Wheeler | 1 | 20.8K | 4.88M | Jul 2013 – Aug 2026 |
| Mitchell State 10 G-9-169897 | BRP Energy, LLC only | Pakenham (Thrusted) | Terrell | 1 | 20.7K | 1.01M | May 1998 – Jul 2001 |
| Boston Texas Land & Trust G-4-272981 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 20.7K | 1.67M | Jun 2014 – Feb 2022 |
| Boston Texas Land & Trust G-4-241531 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 20.4K | 2.09M | Jan 2008 – Aug 2026 |
| Flowers Trust G-14-228145 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 20.3K | 1.35M | Mar 2007 – Aug 2026 |
| Vollmert Trust SL G-14-246766 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 20K | 1.69M | Jan 2009 – Aug 2026 |
| Duderstadt Trust 01 G-2-266387 | Marathon Oil EF LLC only | De Witt (Eagle Ford Shale) | De Witt | 1 | 19.7K | 1.07M | Sep 2011 – Aug 2026 |
| Mitchell 2 G-9-159366 | Hilcorp Energy Company only | Pakenham (Thrusted) | Terrell | 1 | 19.6K | 1.38M | Apr 1996 – Aug 2026 |
| Bruni Mineral Trust G-4-153506 | Hilcorp Energy Company only | Liz (9200) | Webb | 1 | 19.6K | 1.25M | Mar 1995 – Aug 2026 |
| Anderson Trust Unit G-13-273307 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 19.4K | 1.74M | Nov 2010 – Aug 2026 |
| Rustler Hills 18 G-10-277516 | Conocophillips Company only | Sandbar (Bone Spring) | Reeves | 1 | 19.3K | 963K | Dec 2013 – Oct 2022 |
| Boston Texas Land & Trust G-4-272980 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 19.1K | 883K | May 2014 – Aug 2026 |
| USA Trust G-13-248091 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 19K | 1.42M | Apr 2009 – Aug 2026 |
| James Trust G-1-279457 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | Webb | 1 | 19K | 4.64M | Jul 2015 – Aug 2026 |
| University 5 G-9-164180 | White Rock Oil & Gas, LLC only | Pakenham (Thrusted) | Terrell | 1 | 18.9K | 598K | Nov 1996 – Aug 2026 |
| Mitchell, Alex 1 G-9-172854 | White Rock Oil & Gas, LLC only | Pakenham (Thrusted) | Terrell | 1 | 18.8K | 512K | Feb 1999 – Aug 2026 |
| Dusek, F. J. Trust G-4-174028 | Merit Energy Company only | Jeffress, NE. (T, Lo.-Fb,a) | Hidalgo | 1 | 18.8K | 911K | Aug 1999 – Sep 2017 |
| Flowers Trust "A" G-14-170707 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 18.8K | 1.26M | Jul 1998 – Aug 2026 |
| Boston Texas Land & Trust G-4-286358 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 18.8K | 2.91M | Apr 2019 – Aug 2026 |