| The Dinn Mineral Trusts G-4-186628 | Hilcorp Energy Company only | Guerra (10900) | Webb | 1 | 18 | 1.36M | Oct 2001 – Aug 2026 |
| Marshall,stanley G. Trustee -A- G-4-108804 | Hughes, Dan A. Company only | Tom Shearman (11200) | Webb | 1 | 18 | 503K | by Jan 1993 – Mar 1994 |
| Longfellow G-10-273570 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 18 | 130K | Jan 2011 – Aug 2026 |
| West Ranch G-10-252865 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 18 | 33.1K | Sep 2008 – Jul 2026 |
| El Peyote Mineral Trust G-4-145748 | TD Natural Resources LLC only | Loma Vieja (Wilcox) | Zapata | 1 | 17 | 4.72M | May 1993 – Jul 2002 |
| Longfellow G-10-249922 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 17 | 271K | Jun 2008 – Aug 2026 |
| West Ranch G-10-217783 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 17 | 14.7K | Apr 2006 – Sep 2007 |
| Cartwright Trust G-2-172731 | C & E Operating, Inc. only | Berclair, E. (Frio Middle) | Goliad | 1 | 17 | 236K | Feb 1999 – Feb 2002 |
| Cole Trust Three G-13-184865 | Devon Energy Production Co, L.P. only | Newark, East (Barnett Shale) | Denton | 1 | 16 | 294K | Aug 2001 – Apr 2009 |
| The Dinn Mineral Trusts G-4-175497 | Hilcorp Energy Company only | Guerra (10600) | Webb | 1 | 16 | 1.96M | Dec 1999 – May 2016 |
| Randee Fawcett Trust G-9-215918 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 16 | 226K | Sep 2005 – Jul 2026 |
| Fawcett, Randee Trust C G-9-215977 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 16 | 183K | Oct 2005 – Jul 2026 |
| Haynes Mineral Trust G-4-146891 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 16 | 670K | Sep 1993 – Aug 2026 |
| Haynes Mineral Trust G-4-209789 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 15 | 602K | Feb 2005 – Aug 2026 |
| Trust "H. T. & B." Unit G-8-175389 | Van Operating, Ltd. only | Antelope Hills (Caddo, Upper) | Shackelford | 1 | 15 | 71.4K | Sep 1999 – Jan 2001 |
| Citizens Natl. Bank Trustee -G- G-14-119368 | United Oil & Shale LLC only | Coburn (Morrow, Lo.) | Lipscomb | 1 | 15 | 2.35K | by Jan 1993 – Dec 1993 |
| Cole, M. T. Trust G-13-60258 | 4M Oil & Gas, LLC only | Gas Finders (Congl.) | Denton | 1 | 15 | 386K | by Jan 1993 – Aug 2026 |
| Allison Ranch G-10-248775 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 15 | 1.24M | Feb 2009 – Apr 2024 |
| Longfellow G-10-246151 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 15 | 177K | Oct 2008 – Apr 2026 |
| Young Trust G-14-108206 | Mmgl Txph, LLC only | Allison Parks (Morrow, Up.) | Hemphill | 1 | 15 | 4.75M | by Jan 1993 – Aug 2026 |
| Hill-Fawcett, Randee Trust "D" G-9-215264 | Upp Operating, LLC only | Sawyer (Strawn, North) | Sutton | 1 | 15 | 14.8K | Oct 2005 – Nov 2005 |
| Cole Trusts 576 "A" G-13-184863 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 15 | 403K | Aug 2001 – Jun 2026 |
| Benavides Trust G-4-200536 | Merit Energy Company only | Hundido (Lobo) | Zapata | 1 | 15 | 345K | Mar 2004 – Feb 2016 |
| Haynes Mineral Trust G-4-148682 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 14 | 345K | Jan 1994 – Dec 2000 |
| Iowa Realty Trust G-10-44766 | Olsen Energy Inc. only | Pecos Valley (Wolfcamp) | Pecos | 1 | 14 | 1.04M | by Jan 1993 – Aug 2026 |
| Woodward Trust #1 G-8-136242 | Palo Pinto Bond Company, LLC only | Middle Creek (Congl.) | Palo Pinto | 1 | 14 | 136K | by Jan 1993 – Jun 2015 |
| West Ranch G-10-249678 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 277K | Dec 2008 – Feb 2024 |
| Boston Texas Land Trust #5 G-4-155282 | Legacy Corporation, The only | Amore (Vicksburg 6100) | Hidalgo | 1 | 14 | 3.92K | Jul 1995 – Aug 1995 |
| Allison Ranch G-10-248893 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 2.7M | Mar 2009 – Apr 2024 |
| West Ranch G-10-239068 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 188K | Jan 2008 – Jul 2026 |
| Allison G-10-248454 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 1.28M | Feb 2009 – Apr 2024 |
| Hill-Randee Fawcett Trust "C" G-9-105812 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 14 | 164K | by Jan 1993 – Jul 2026 |
| Allison G-10-239159 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 1.7M | Apr 2008 – Apr 2024 |
| West Ranch G-10-274888 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 14 | 816K | Sep 2010 – Dec 2023 |
| Haynes Mineral Trust G-4-122921 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 14 | 58.9K | by Jan 1993 – Mar 2008 |
| Bruni Mineral Trust 'B' G-4-289841 | Hilcorp Energy Company only | Laredo (5680) | Webb | 1 | 13 | 23 | May 2018 – Oct 2020 |
| West Ranch G-10-257998 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 13 | 690K | Mar 2010 – Apr 2024 |
| West State G-10-264429 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 13 | 602K | Oct 2010 – Aug 2026 |
| Allison G-10-230103 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 13 | 1.99M | Jul 2007 – Mar 2023 |
| West Ranch G-10-183909 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 13 | 688K | Aug 2001 – Apr 2024 |
| Henderson Trust GG G-9-155440 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 13 | 125K | Jun 1995 – Aug 2026 |
| West State G-10-261468 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 13 | 1.22M | Sep 2009 – Apr 2024 |
| Tuttle G-2-147934 | Hunt, Wm. Herbert, Trust Est. only | Davo (Frio 2970) | Lavaca | 1 | 13 | 218K | Jun 1994 – May 1997 |
| Creek Ranch 10 G-9-153835 | Conocophillips Company only | Pakenham (Thrusted) | Terrell | 1 | 13 | 1.34K | Mar 1995 – Mar 2000 |
| West Ranch South 4 G-10-253748 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 12 | 1.08M | May 2009 – Apr 2024 |
| West Ranch G-10-247191 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 12 | 44.6K | Nov 2008 – Feb 2025 |
| West Ranch G-10-259415 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 12 | 826K | Mar 2010 – Apr 2024 |
| Cole, M. T. Trust Two "A" G-13-185075 | Devon Energy Production Co, L.P. only | Newark, East (Barnett Shale) | Denton | 1 | 12 | 413K | Sep 2001 – Aug 2009 |
| Delozeis Family Trust G-4-213592 | Hilcorp Energy Company only | Exsun (Lobo Cons.) | Zapata | 1 | 12 | 386K | May 2005 – Aug 2026 |
| West Ranch G-10-224186 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 12 | 387K | Jun 2006 – Jul 2026 |