| Bruni Mineral Trust G-4-171237 | Hilcorp Energy Company only | Liz (9200) | Webb | 1 | 2.37K | 3.75M | Dec 1998 – Aug 2026 |
| Dickinson, Charles B. Trust G-4-112746 | Valence Operating Company only | Picoso (Carrizo Spike 8070) | Webb | 1 | 2.37K | 709K | by Jan 1993 – Jan 2015 |
| Meeker Trust O-10-36080 | RE-OP Corp. only | Ken Regan (Delaware) | Reeves | 1 | 2.36K | 604 | Aug 1999 – Nov 2002 |
| Hutchins-Peareson Trust G-3-137964 | Royal Oil & Gas Corp. only | Avo Grande (Yegua 6800) | Wharton | 1 | 2.34K | 298K | by Jan 1993 – Jan 1994 |
| Dunagan G-3-157023 | Hunt, Wm. Herbert, Trust Est. only | Crooked Bayou (12,000 Yegua) | Liberty | 1 | 2.33K | 7.49K | Oct 1995 – Nov 1995 |
| Watson, R. L. B O-13-25902 | Beisch, Rusty only | Young County Regular | Young | 3 | 2.33K | 19 | by Jan 1993 – May 2002 |
| Flowers Trust "B" G-14-171131 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 2.33K | 795K | Jun 1998 – May 2007 |
| West Ranch G-10-239094 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.33K | 531K | Nov 2007 – Mar 2026 |
| Bruni Mineral Trust "A" G-4-82524 | Hilcorp Energy Company only | Juanita (Lobo) | Webb | 1 | 2.33K | 333K | by Jan 1993 – Aug 2024 |
| West Ranch G-10-237927 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.32K | 21.5K | Nov 2007 – Apr 2023 |
| Coates, F. G. Trustee -B- O-8-3333 | Chiodo Corp. only | Shackelford County Regular | Shackelford | 13 | 2.32K | 22 | by Jan 1993 – Oct 1994 |
| Bruni Mineral Trust 'A' G-4-150058 | Hilcorp Energy Company only | B.M.T. (Lobo Cons.) | Webb | 1 | 2.31K | 716K | Jun 1994 – Aug 2026 |
| Stovall, Guy F. Trust O-3-21087 | Hughes, Dan A. Company only | Chitland Creek (7350 Yegua) | Wharton | 1 | 2.3K | 4.68K | by Jan 1993 – Apr 1994 |
| Fidelity Trust G-10-173742 | BP America Production Company only | Waha (Delaware) | Reeves | 1 | 2.3K | 71K | Jun 1999 – Apr 2009 |
| Los Ojuelos Mineral Trust G-4-246236 | Rincon Petroleum Corporation only | Pancho (Wilcox) | Webb | 1 | 2.3K | 324K | Jan 2007 – Aug 2020 |
| Broussard Trust G-3-250035 | Milestone Operating, Inc. only | Lovells Lake (Marg. 7500) | Jefferson | 1 | 2.3K | 513K | Apr 2009 – May 2016 |
| Longfellow 130 G-10-225557 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.29K | 42.4K | Aug 2006 – Oct 2025 |
| Rust 24 O-10-54343 | Formentera Operations LLC only | Keystone (San Andres) | Winkler | 1 | 2.28K | 0 | Sep 2019 – Mar 2020 |
| Wolf, John E. O-8-19939 | Trustar Operating Company Inc. only | Coleman County Regular | Coleman | 1 | 2.27K | 8.63K | Apr 1993 – Aug 2000 |
| Mitchell - Williams Trust G-5-213583 | Valence Operating Company only | Loper (Cotton Valley Lime) | Freestone | 1 | 2.27K | 355K | May 2005 – Aug 2026 |
| Jones Trust "21" G-14-193610 | Mewbourne Oil Company only | Canadian, SE (Douglas) | Hemphill | 1 | 2.26K | 1.85M | Mar 2003 – Aug 2026 |
| Garza-Zamora Energy Trust G-4-223662 | Merit Energy Company only | Flores, W. (Vksbrg, Geopressure) | Hidalgo | 1 | 2.26K | 268K | Dec 2006 – Aug 2026 |
| Snyder Mineral Trust 143 O-8-20859 | L.C.S. Production Company only | Callahan County Regular | Callahan | 2 | 2.26K | 194 | by Jan 1993 – Dec 2000 |
| West Ranch G-10-250400 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.24K | 1.32M | Dec 2008 – Jul 2026 |
| Walker, Alice Trust "A" O-8-22507 | Enserch Exploration, Inc only | Little Cone (Miss) | Stephens | 1 | 2.24K | 2.52K | by Jan 1993 – May 1994 |
| Read Trust "A" G-14-189964 | Presidio Petroleum LLC only | Hemphill (Douglas) | Hemphill | 1 | 2.23K | 184K | Oct 2002 – Aug 2008 |
| De la Garza Mineral Trust A G-4-166868 | Petro-Smith Operating LLC only | Picoso (Wilcox 7600) | Webb | 1 | 2.23K | 736K | Jan 1998 – Feb 2018 |
| Flowers Trust "B" G-14-171716 | BP America Production Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 2.22K | 159K | Nov 1998 – Dec 2002 |
| West Ranch G-10-240077 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.21K | 1.19M | Apr 2008 – Jul 2026 |
| King Trust "A" O-14-7872 | Unit Petroleum Company only | Hemphill (Granite Wash.) | Hemphill | 1 | 2.21K | 96.2K | Apr 2008 – Apr 2010 |
| Walker-Buckler Trust -A- O-8-9027 | Grothe, M.L. Est. only | Shackelford County Regular | Shackelford | 9 | 2.21K | 22 | by Jan 1993 – Oct 2014 |
| West Ranch G-10-249756 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.2K | 31.8K | Jan 2008 – Feb 2025 |
| West Ranch G-10-249292 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.19K | 421K | Jan 2009 – Mar 2024 |
| Longfellow 600 MD G-10-240640 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.19K | 3.46M | Mar 2008 – Aug 2026 |
| James Trust G-4-146484 | Lewis Petro Properties, Inc. only | Tom Walsh (Olmos) | Webb | 1 | 2.19K | 758K | Sep 1993 – Jun 2026 |
| Blount Trust O-6-11289 | Lindsey, Bert D. only | Nacogdoches | Angelina | 3 | 2.18K | 105 | by Jan 1993 – Nov 2001 |
| Armour Trust, et Al O-3-27287 | Hilcorp Energy Company only | Phase Four (9050 Yegua) | Wharton | 1 | 2.18K | 8.12K | Sep 2017 – Nov 2017 |
| Bruni Mineral Trust "B" G-4-262327 | Hilcorp Energy Company only | Liz (Lobo 6) | Webb | 1 | 2.17K | 352K | May 2010 – Aug 2026 |
| Henderson Trust "GG" G-9-144670 | Red Stag Operating, LLC only | Ozona, SW. (Strawn) | Crockett | 1 | 2.17K | 1.12M | by Jan 1993 – Aug 2026 |
| West Ranch G-10-238776 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.16K | 3.92M | Mar 2008 – May 2026 |
| Henderson Trust "N" O-9-16814 | Apache Corporation only | Howards Creek (Canyon) | Crockett | 1 | 2.14K | 94.6K | Dec 2008 – Nov 2019 |
| MDC Trust G-13-240119 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Erath | 1 | 2.13K | 308K | Feb 2008 – Mar 2017 |
| Cuellar Trust "a" GU G-4-161602 | EOG Resources, Inc. only | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 2.13K | 1.72M | Dec 1996 – Aug 2000 |
| Kincaid, A. R. Trust "B" G-9-19119 | Scout Energy Management LLC only | Ozona, East (Ellenburger) | Crockett | 1 | 2.13K | 479K | by Jan 1993 – Apr 2010 |
| Guerra Mineral Trust (NCT-II) O-4-12479 | Wallis Energy, Inc. only | Guerra, E. (Hockley) | Starr | 1 | 2.12K | 2.87K | Jul 1995 – Mar 1999 |
| Martin, Mary Lynn Royalty Trust O-9-1266 | RSK Oil Company only | Shannon (San Andres) | Crockett | 1 | 2.12K | 46 | by Jan 1993 – Sep 1997 |
| Longfellow G-10-244896 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 2.12K | 1.11M | Jul 2008 – Aug 2026 |
| Coates, F. G. Trustee -C- O-8-6353 | Spring Tree Management LC only | Shackelford County Regular | Shackelford | 3 | 2.12K | 20 | by Jan 1993 – Oct 2000 |
| Cole Trust Stony G-13-187578 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 2.11K | 220K | Feb 2002 – Aug 2026 |
| Tarbox Trust O-14-7160 | Amoco Production Company only | Horizon (Cleveland) | Ochiltree | 1 | 2.1K | 0 | Oct 1996 – Jul 1997 |