| Randee Fawcett Trust G-9-215917 | Upp Operating, LLC only | Sawyer (Canyon) | Sutton | 1 | 692 | 347K | Nov 2005 – Jul 2026 |
| McMillan, Malcolm O-6-11096 | Long Trusts, The only | Toolan (Pettit, Lower) | Nacogdoches | 1 | 691 | 22.7K | by Jan 1993 – Jan 1999 |
| Amando Garza Trust G-4-223900 | Hilcorp Energy Company only | Charco (9200) | Zapata | 1 | 690 | 4.08M | Dec 2006 – Aug 2026 |
| Power Trust/T Bar-X O-5-4433 | Giant NRG Co., LP only | Ici (Georgetown) | Robertson | 1 | 689 | 0 | Jul 2020 – Sep 2025 |
| Henderson Trust "EE" G-9-144201 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 688 | 492K | by Jan 1993 – Oct 1995 |
| May Heritage Trust, The O-1-6581 | 3-L Drilling only | La Vernia | Guadalupe | 8 | 682 | 52 | by Jan 1993 – Apr 1995 |
| Watson, F M, Trust et al "B" O-3-28300 | Atlas Operating LLC only | Rugeley, N. (13100) | Matagorda | 1 | 681 | 0 | Mar 2026 – Aug 2026 |
| North Hayter Trust A G-6-233115 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 681 | 882K | Dec 2007 – Aug 2026 |
| North Hayter Trust G-6-203918 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 679 | 1.47M | Jul 2004 – Aug 2026 |
| Wardner, G. P., Trustee O-4-3833 | Poor Boy Oilfield Service only | El Tanque (1580 Sand) | Starr | 3 | 677 | 37 | by Jan 1993 – Jul 1996 |
| Bruni Mineral Trust G-4-78042 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 675 | 1.54M | by Jan 1993 – Aug 2026 |
| West Ranch 5 G-10-173864 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 672 | 8.72M | Jul 1999 – Dec 2023 |
| Hubberd Trust G-4-224997 | Hilcorp Energy Company only | Hubberd (Lobo) | Webb | 1 | 670 | 945K | Jan 2006 – Aug 2026 |
| University 10B O-10-27612 | Aaa Oil Trust only | Cardinal (Queen, W. ) | Pecos | 3 | 669 | 7.06K | Jan 1996 – Jun 2005 |
| Bruni Mineral Trust G-4-113168 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 668 | 474K | by Jan 1993 – Aug 2026 |
| West Ranch G-10-249744 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 667 | 1.5M | Apr 2008 – Jul 2026 |
| Jones Trust -25- G-14-126497 | Unbridled Resources, LLC only | Canadian, SE (Douglas) | Hemphill | 1 | 665 | 192K | by Jan 1993 – Sep 2019 |
| Wm James Trust G-4-98532 | Lewis Petro Properties, Inc. only | Tom Walsh (Olmos) | Webb | 1 | 663 | 157K | by Jan 1993 – Aug 2026 |
| Justiss, T.C. O-8-17333 | Foree, R. L. Trust "A" only | Neeper (Canyon Sand) | Fisher | 2 | 663 | 4.45K | by Jan 1993 – Oct 1993 |
| Thomas Trust G-3-244799 | Wagner Oil Company only | Lissie, W. (Wilcox Upper) | Colorado | 1 | 662 | 35.2K | Mar 2009 – Sep 2013 |
| Bailey, James Trustee G-3-156897 | Shana Petroleum Company only | Paul (LW-11) | Colorado | 1 | 662 | 31.1K | Nov 1995 – Apr 1996 |
| First National Trust-Courson 571 G-14-226825 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 1 | 658 | 287K | Jan 2007 – Aug 2026 |
| Longfellow State "D" G-10-244113 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 656 | 1.45M | Jun 2008 – Mar 2024 |
| Benavides Trust G-4-196957 | Merit Energy Company only | Hundido (Lobo) | Zapata | 1 | 655 | 4.42M | Sep 2003 – Apr 2025 |
| North Hayter Trust G-6-215263 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 654 | 646K | Jul 2005 – Jan 2025 |
| Wm James Trust G-4-208786 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 654 | 379K | Apr 2005 – Feb 2023 |
| Trust McCoy "B" G-8-174558 | Van Operating, Ltd. only | Hughes - Odell, SW (Congl) | Throckmorton | 1 | 651 | 10K | Nov 1999 – Dec 1999 |
| Johnson Trust Unit G-4-223630 | Dewbre Petroleum Corporation only | Ricardo, North (10,200) | Kleberg | 1 | 650 | 7.7K | Nov 2006 – Aug 2014 |
| North Hayter Trust G-6-207776 | Texian Operating Company, LLC only | Douglass, W. (Travis Peak) | Nacogdoches | 1 | 648 | 1.09M | Jan 2005 – Aug 2026 |
| Broussard Trust G-3-167436 | Milestone Operating, Inc. only | Lovells Lake (Marg. 7500) | Jefferson | 1 | 648 | 182K | Nov 1997 – Feb 2026 |
| McLean, Marrs, Trust -A- G-4-14629 | Columbus Energy, LLC only | Thompsonville, NE (Wilcox 9500) | Jim Hogg | 1 | 647 | 4.4M | by Jan 1993 – Aug 2026 |
| West Ranch G-10-253230 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 644 | 170K | Jun 2009 – Jul 2026 |
| Haynes Mineral Trust G-4-139158 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 638 | 1.54M | by Jan 1993 – Aug 2011 |
| West Ranch G-10-246149 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 638 | 628K | Nov 2008 – Aug 2026 |
| McKnight, S.A., Trustee O-1-7948 | Endeavor Natural Gas, LP only | Pearsall (Austin Chalk) | Dimmit | 1 | 637 | 243 | by Jan 1993 – Jan 2016 |
| West Ranch G-10-274332 | Sandridge Expl. and Prod., LLC only | Pinon (Overthrust) | Pecos | 1 | 637 | 2.75K | Oct 2012 – Oct 2014 |
| Oloughlin, C. C., Sr. Trust O-14-2580 | Discovery Operating, Inc. only | Spearman,n.(lansing-Kansas City) | Hansford | 2 | 636 | 11.3K | Apr 1994 – Jan 1997 |
| Savage Family Trust O-10-38801 | Williams, Clayton Energy, Inc. only | Spraberry (Trend Area) | Gaines | 1 | 632 | 0 | Apr 2008 – Jul 2010 |
| West Ranch G-10-259454 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 629 | 29.5K | Sep 2010 – Sep 2023 |
| Eubanks Trust G-5-158593 | Diversified Production LLC only | Teague (CV-Bossier Cons.) | Freestone | 1 | 626 | 1.56M | Mar 1996 – Aug 2026 |
| Walker-Buckler Trust Tr. 21 G-8-55910 | Keating Energy, Inc. only | Shackelford Ne(miss) | Shackelford | 1 | 623 | 187K | by Jan 1993 – Nov 2025 |
| West Ranch G-10-204037 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 623 | 2.27M | Jul 2004 – Mar 2024 |
| C-Bruni Mineral Trust G-4-69975 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 623 | 225K | by Jan 1993 – Aug 2026 |
| Watson Trust GU G-5-219279 | Formation Resour Field Svcs, LLC only | Stewards Mill, NE. (Rodessa) | Freestone | 1 | 616 | 112K | Jun 2005 – Dec 2023 |
| Henderson Trust "EE" G-9-144666 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 614 | 364K | Feb 1993 – Oct 1994 |
| Iowa Realty Trust -B- O-10-4722 | Bebco Parts Industries, Inc. only | Pecos Valley (High Gravity) | Pecos | 16 | 612 | 23 | by Jan 1993 – Jan 2002 |
| West Ranch G-10-224601 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 612 | 665K | Aug 2006 – Mar 2024 |
| Boston Texas Land Trust # 8 O-4-12506 | Legacy Corporation, The only | Amore (Vicksburg 5750) | Starr | 1 | 607 | 794 | Nov 1995 – Mar 1996 |
| HTR-Wolf B O-8-25573 | Trustar Operating Company Inc. only | Wolf (Serratt Lower) | Coleman | 1 | 603 | 2.43K | Apr 1993 – Dec 2000 |
| Boston Texas Land Trust # 10 G-4-157569 | Legacy Corporation, The only | Amore (Vicksburg 5950) | Starr | 1 | 603 | 88.5K | Dec 1995 – Nov 1996 |