| Boston Texas Land & Trust G-4-272976 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 28.8K | 1.82M | Apr 2014 – Aug 2026 |
| Ford, Ed "D" O-8-14441 | Long Trusts, The only | Lucky Lane (Strawn) | Stephens | 2 | 28.8K | 54 | by Jan 1993 – Jul 2026 |
| Smith Oil Unit O-6-13115 | Long Trusts, The only | Danville (Pettit-A-Oil) | Gregg | 1 | 28.8K | 121K | by Jan 1993 – May 2000 |
| Boston Texas Land & Trust G-4-272973 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 28.7K | 2.11M | Mar 2014 – Aug 2026 |
| Guitar Trust Estate O-8-2225 | Beasley Well Service Inc. only | Jones County Regular | Jones | 7 | 28.7K | 138 | by Jan 1993 – Jul 2026 |
| Dunn Family Trust a Unit G-13-274506 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 28.6K | 1.29M | Oct 2009 – Aug 2026 |
| Boring, George W. Trustee GU G-13-235186 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 28.4K | 4.6M | Oct 2007 – Aug 2026 |
| Chapman O-8-28007 | Carey, Shirley L. Trust only | Group (4000) | Nolan | 1 | 28.3K | 0 | Oct 1996 – Apr 2001 |
| Hager Trust 616 G-14-279070 | BE Anadarko II, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 28.3K | 383K | Apr 2015 – Aug 2026 |
| Bracken Grandchildren Trust G-6-135300 | Valence Operating Company only | Noonday (Travis Peak) | Smith | 1 | 28.2K | 1.41M | by Jan 1993 – Feb 2019 |
| Nelson, C. L. Trust et Al G-2-96089 | Samson Lone Star, LLC only | Limes (Wilcox 9900) | Live Oak | 1 | 28.2K | 1.33M | by Jan 1993 – Jun 2000 |
| Morris, Annie T. -B- O-13-1905 | JF Trust only | Ross | Clay | 1 | 28.2K | 21 | by Jan 1993 – Mar 2016 |
| Flowers Trust "A" G-14-250135 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 28.1K | 830K | May 2009 – Aug 2026 |
| Broussard Trust O-3-25902 | Samson Exploration, LLC only | Sunset (Frio 8230) | Jefferson | 1 | 28.1K | 11.5K | May 2012 – Aug 2012 |
| Sterling Family Trust "C" O-10-34357 | MDC Operating, Inc. only | Double "B" (Canyon) | Mitchell | 1 | 28.1K | 126K | Jan 1995 – Nov 1998 |
| Royall Trust Unit O-6-15204 | Craton Operating LLC only | Blackfoot Field | Anderson | 1 | 28.1K | 0 | May 2013 – Aug 2026 |
| Flowers Trust "B" G-14-247757 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 27.9K | 1.55M | Jan 2009 – Aug 2026 |
| Royall, John Trust et Al G-6-181045 | Eqv Operating LLC only | Cayuga (Pettit) | Anderson | 1 | 27.9K | 1.18M | Jan 2001 – Feb 2023 |
| Regmund Family Trust Gas Unit 1 G-2-268683 | Mmar Group Inc only | Sugarkane (Eagle Ford) | Karnes | 1 | 27.7K | 703K | Aug 2012 – Aug 2018 |
| Zively Trustee O-3-24775 | Maverick Prod. Co., Inc. only | Blue Ridge | Fort Bend | 2 | 27.7K | 22 | Oct 2005 – Oct 2011 |
| Texaco-Slator -22- O-10-31158 | Rust Oil Corp. only | Goldsmith (5600) | Ector | 2 | 27.5K | 23.9K | by Jan 1993 – Oct 2006 |
| Trammel Trust G-3-93136 | Devon Energy Production Co, L.P. only | Leggett (Woodbine) | Polk | 1 | 27.5K | 899K | by Jan 1993 – Oct 2004 |
| Blackwell Trust Gas Unit G-2-223762 | Mosley Oil &gas Inc only | Friar Ranch, S. (Consolidated) | De Witt | 1 | 27K | 5.26M | Nov 2006 – Apr 2022 |
| McNutt, W. L. O-6-3075 | Long Trusts, The only | McNutt (Pettit) | Smith | 1 | 27K | 21 | by Jan 1993 – Oct 2018 |
| Flowers Trust G-14-149917 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.9K | 780K | Mar 1994 – Aug 2026 |
| West Ranch G-10-234730 | Sandridge Expl. and Prod., LLC only | Pinon (Overthrust) | Pecos | 1 | 26.8K | 232K | Oct 2007 – Sep 2014 |
| Flowers Trust G-14-267522 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.7K | 1.11M | May 2012 – Aug 2026 |
| Watkins Scholarship Trust G-6-287222 | Sabine Energy Inc. only | Oak Hill (Travis Peak) | Rusk | 1 | 26.6K | 551K | Nov 2018 – Aug 2026 |
| Fite, W. P. Unit O-6-11004 | Long Trusts, The only | Henderson South (Travis Peak -B- | Rusk | 1 | 26.6K | 106K | by Jan 1993 – Mar 2006 |
| Boston Texas Land & Trust G-4-266234 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 26.5K | 2.16M | Nov 2012 – Aug 2026 |
| White Creek Unit O-2-1950 | Richard C. Bellows Family Trust only | White Creek | Live Oak | 1 | 26.5K | 39 | by Jan 1993 – Apr 2022 |
| Flowers Trust "A" G-14-258245 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.5K | 666K | Apr 2010 – Aug 2026 |
| Rust-Houdek Unit O-3-15103 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 2 | 26.5K | 373K | by Jan 1993 – Mar 2019 |
| Vollmert Trust G-14-266386 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.5K | 2.17M | Mar 2012 – Aug 2026 |
| Cook Family Trust G-3-254627 | Vantage Operating, LLC only | Cecil Noble (Wilcox 9325) | Colorado | 1 | 26.4K | 1.15M | Dec 2009 – Mar 2023 |
| Midland National Bank Trustee O-10-35034 | Manti Tarka Permian OP, LLC only | War-Wink, S. (Wolfcamp) | Ward | 1 | 26.2K | 29.1K | Jun 1996 – May 2015 |
| Boston Texas Land & Trust G-4-272965 | Merit Energy Company only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 26.2K | 1.53M | Feb 2014 – Aug 2026 |
| Trust, C. E. O-13-29456 | Ferguson, S. M. Jr., Inc. only | Searcys (Miss) | Hardeman | 1 | 26.1K | 0 | Feb 1998 – Sep 2006 |
| Mitchell 9 G-9-168042 | PXP Texas Inc. only | Pakenham (Thrusted) | Terrell | 1 | 26.1K | 4.11M | Jan 1998 – Feb 2005 |
| Bauer Trust O-3-27219 | S & S Operating Company, Inc. only | Bauer Ranch (Nodosaria 2ND) | Jefferson | 1 | 26.1K | 79.5K | Jan 2016 – Jul 2026 |
| Flowers Trust "A" G-14-254685 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 25.9K | 556K | Jan 2010 – Aug 2026 |
| Rust Unit G-3-294630 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 25.7K | 206K | Mar 2022 – Jul 2026 |
| Barcus O-13-28079 | Bayer, Frances E. Rev Liv Trust only | Barcus (Strawn) | Cooke | 2 | 25.7K | 22 | by Jan 1993 – Jan 2016 |
| Alexander Trust "7" O-8-16478 | Clear Fork, Incorporated only | Alexander (Canyon Lower) | Stonewall | 2 | 25.6K | 21 | by Jan 1993 – Jul 2001 |
| Flowers Trust 'A' G-14-276176 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 25.6K | 453K | Jul 2014 – Aug 2026 |
| Parker Trust 20 O-10-40513 | Acoma Operating, LLC only | Goldsmith (Pennsylvanian) | Ector | 1 | 25.6K | 45.8K | Jul 2010 – Aug 2026 |
| Red Crest Trust G-4-213498 | Hilcorp Energy Company only | Roleta (Wilcox Consolidated) | Zapata | 1 | 25.5K | 2.5M | Jul 2005 – Aug 2026 |
| Schreiner Ranch Trust II G-2-144885 | Sandel Operating Company only | Oakville (Wilcox Cons.) | Live Oak | 1 | 25.5K | 1.46M | Feb 1993 – Aug 2026 |
| Hooker Trust O-8-24165 | Sojourner Drilling Corporation only | Billy-Billy (Upper Strawn) | Stonewall | 1 | 25.5K | 20 | by Jan 1993 – Mar 2007 |
| Sherrill Trusts O-13-28848 | LMH Energy only | Wichita County Regular | Wichita | 3 | 25.4K | 1 | Sep 1994 – Jul 2026 |