| West Ranch G-10-253556 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 559 | 1.36M | May 2009 – Apr 2024 |
| Randee Fawcett Trust G-9-205988 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 555 | 319K | Dec 2003 – Jul 2026 |
| West Ranch G-10-239312 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 552 | 221K | Dec 2007 – Aug 2026 |
| Aycock Trust G-14-196699 | Courson Oil & Gas, Inc. only | At (Morrow, Upper) | Sherman | 1 | 551 | 13.3K | Sep 2003 – May 2009 |
| Henderson Trust "N" G-9-210335 | Apache Corporation only | Howards Creek (Canyon) | Crockett | 1 | 551 | 20.8K | Jul 2005 – Nov 2008 |
| Dinn, Mineral Trusts G-4-133566 | Hilcorp Energy Company only | Guerra (Elvella) | Webb | 1 | 551 | 677K | by Jan 1993 – Aug 2026 |
| West Ranch G-10-256594 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 550 | 307K | Dec 2008 – Jan 2026 |
| West Ranch G-10-235788 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 548 | 168K | Oct 2007 – Jan 2017 |
| Martin, Albert Trustee G-4-92000 | Wallis Energy, Inc. only | Bruni, SE. (2940) | Webb | 1 | 548 | 140K | by Jan 1993 – Mar 2026 |
| Longfellow 600 G-10-238032 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 547 | 2.18M | Mar 2008 – Aug 2026 |
| West Ranch G-10-229051 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 542 | 367K | Apr 2007 – Sep 2023 |
| Archer Trusts G-14-148067 | Kodiak Oil & Gas, Inc. only | Hansford (Morrow, Lower) | Hansford | 1 | 539 | 2.19M | Jan 1994 – Aug 2026 |
| Henderson Trust "DD" G-9-142866 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 538 | 419K | by Jan 1993 – Jan 1995 |
| West Ranch G-10-192537 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 537 | 441K | Nov 2002 – Aug 2026 |
| West Ranch G-10-248360 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 536 | 42.1K | Feb 2009 – Jun 2025 |
| Bruni Mineral Trust G-4-93013 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 531 | 1.55M | by Jan 1993 – Aug 2026 |
| VT James Trust 1355 G-4-193612 | Lewis Petro Properties, Inc. only | Tom Walsh (Olmos) | Webb | 1 | 530 | 503K | Feb 2003 – Aug 2026 |
| Allison G-10-239069 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 527 | 7.26M | Mar 2008 – Mar 2024 |
| Cole Trust "C" G-13-180734 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 527 | 205K | Nov 2000 – Feb 2017 |
| West Ranch G-10-234724 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 526 | 217K | Dec 2007 – Feb 2025 |
| Bruni Mineral Trust "A" G-4-224425 | Hilcorp Energy Company only | Cerrito Creek (Lobo) | Webb | 1 | 526 | 339K | Oct 2006 – Aug 2026 |
| Guaranty Title & Trust "A" G-4-125465 | Pine Island Operating, L.L.C. only | Corpus Christi, West ( 8800) | Nueces | 1 | 523 | 6.2K | Apr 1993 – Jan 1994 |
| Snyder Mineral Trust "26" G-8-50113 | Snyder Drilling Corp. only | C & P (Lake) | Shackelford | 1 | 521 | 517K | by Jan 1993 – Dec 2024 |
| Trust, James 953 G-4-127368 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 520 | 376K | by Jan 1993 – Aug 2026 |
| Bruni Mineral Trust G-4-146520 | Chevron U. S. A. Inc. only | Liz (9200) | Webb | 1 | 520 | 79.5K | Sep 1993 – Jan 1996 |
| Henderson Trust G-9-104408 | Apache Corporation only | Howards Creek (Penn.) | Crockett | 1 | 519 | 1.21M | by Jan 1993 – Jul 2006 |
| Allison G-10-158911 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 518 | 4.38M | Jan 1996 – Sep 2019 |
| West Ranch G-10-248491 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 516 | 334K | May 2008 – Aug 2026 |
| West Ranch G-10-237929 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 516 | 1.23M | Jan 2008 – Aug 2026 |
| West Ranch G-10-248777 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 515 | 1.57M | Feb 2009 – Apr 2024 |
| West Ranch G-10-208561 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 512 | 171K | Sep 2004 – Apr 2024 |
| Merritt, Thomas C. Trustee G-6-169853 | Eqv Operating LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 504 | 537K | Mar 1998 – Aug 2026 |
| West Ranch G-10-235272 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 503 | 308K | Aug 2007 – Aug 2026 |
| West Ranch G-10-234723 | Sandridge Energy, Inc. only | Pinon (Overthrust) | Pecos | 1 | 503 | 2.27K | Oct 2007 – Jan 2009 |
| North Hayter Trust G-6-236448 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 500 | 1.66M | May 2008 – Aug 2026 |
| Jones Trust -24- G-14-191294 | Unbridled Resources, LLC only | Canadian, SE (Douglas) | Hemphill | 1 | 499 | 286K | Sep 2002 – Sep 2019 |
| North Hayter Trust G-6-199028 | Wallace Operating Company LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 499 | 236K | Nov 2003 – Jun 2024 |
| West Ranch G-10-257999 | Sandridge Expl. and Prod., LLC only | Pinon (Overthrust) | Pecos | 1 | 492 | 174K | Mar 2010 – Sep 2014 |
| Uribe Family Trust G-4-186378 | Varas Energy Operating Company, only | Pok - a - Dot (8600) | Zapata | 1 | 492 | 173K | Nov 2001 – Aug 2026 |
| West Ranch G-10-245490 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 492 | 1.58M | Nov 2007 – Oct 2025 |
| Henderson Trust "DD" G-9-144671 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 490 | 148K | Feb 1993 – Apr 1998 |
| West Ranch G-10-210945 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 488 | 263K | Jul 2005 – Aug 2026 |
| Jones Trust G-14-197990 | Mewbourne Oil Company only | Coburn Lower (Lower Morrow) | Lipscomb | 1 | 487 | 1.72M | Sep 2003 – Aug 2026 |
| Henderson Trust "EE" G-9-143260 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 486 | 132K | by Jan 1993 – Aug 2026 |
| Anthony, James E. Trustee "A" G-6-144419 | Fair Oil, Ltd. only | Green Fox (Hill) | Marion | 1 | 483 | 44.4K | Feb 1993 – Sep 1993 |
| Bruni Mineral Trust "A" G-4-228451 | Hilcorp Energy Company only | Cerrito Creek (Lobo) | Webb | 1 | 480 | 483K | Jun 2007 – Aug 2026 |
| Lopez Mineral Trust G-4-247490 | Hilcorp Energy Company only | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 479 | 1.26M | Feb 2009 – Aug 2026 |
| West Ranch G-10-211086 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 474 | 310K | Jun 2005 – Feb 2025 |
| Doolin Trust G-13-184453 | Sundance Resources, Inc. only | Jupiter (Conglomerate Lower) | Jack | 1 | 472 | 34.3K | Sep 2001 – Sep 2008 |
| Hubberd, Marie S. Trust G-4-166174 | Columbus Energy, LLC only | Hubberd (Lobo) | Webb | 1 | 471 | 97K | Sep 1997 – Nov 2018 |