| Tubbs-AH O-7-6716 | Aaa Oil Trust only | East Texas | Gregg | 10 | 2.64K | 2.32K | by Jan 1993 – Sep 1998 |
| Snyder Mineral Trust O-8-25418 | Delray Oil, Inc. only | Shackelford County Regular | Shackelford | 8 | 2.61K | 244 | by Jan 1993 – Jun 1994 |
| Walker-Buckler Trust/TR 40A/ O-8-26294 | Beehive Operating, LLC only | Fort Griffin, E. (Caddo) | Shackelford | 2 | 2.59K | 6.18K | Sep 1993 – Nov 2012 |
| Kulcak Family Trust Unit O-2-11871 | Kaler Energy Corp. only | Mauritz, East (6970 Sand) | Wharton | 1 | 2.57K | 1.06K | Aug 2019 – Feb 2020 |
| Winans Living Trust "B" O-1-10804 | Southwest Loop 1604, Ltd. only | Somerset | Atascosa | 3 | 2.55K | 44 | by Jan 1993 – Mar 2009 |
| Logan Family Trust O-13-29956 | Hep Oil Company, Ltd. only | Wizard Wells (Caddo 4900) | Jack | 4 | 2.49K | 8.19K | Sep 2001 – Nov 2004 |
| Frye Family Trust O-13-30944 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 3 | 2.44K | 68.5K | Feb 2008 – Aug 2018 |
| Hinrichs-Rust O-9-13289 | Atlas Operating LLC only | Murray-Rust (Strawn) | Tom Green | 1 | 2.39K | 12.1K | by Jan 1993 – Jun 2008 |
| Meeker Trust O-10-36080 | RE-OP Corp. only | Ken Regan (Delaware) | Reeves | 1 | 2.36K | 604 | Aug 1999 – Nov 2002 |
| Watson, R. L. B O-13-25902 | Beisch, Rusty only | Young County Regular | Young | 3 | 2.33K | 19 | by Jan 1993 – May 2002 |
| Coates, F. G. Trustee -B- O-8-3333 | Chiodo Corp. only | Shackelford County Regular | Shackelford | 13 | 2.32K | 22 | by Jan 1993 – Oct 1994 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Henderson Trust "N" O-9-16814 | Apache Corporation only | Howards Creek (Canyon) | Crockett | 1 | 2.14K | 94.6K | Dec 2008 – Nov 2019 |
| 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 |
| 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 |
| Tarbox Trust O-14-7160 | Amoco Production Company only | Horizon (Cleveland) | Ochiltree | 1 | 2.1K | 0 | Oct 1996 – Jul 1997 |
| Mosser Trust O-4-13667 | Harper Hefte, Inc. only | Ben Bolt, W.(4900) | Jim Wells | 1 | 2.09K | 0 | Apr 2011 – Jun 2013 |
| Barker, Paulette Trust O-4-11431 | Green Exploration Company only | Vaello, SW. (Tedlie) | Duval | 1 | 2.07K | 3 | May 1993 – Jan 2011 |
| Loving, Oliver O-13-16927 | Brightman Family Trust only | Jack County Regular | Jack | 1 | 2.06K | 20 | by Jan 1993 – Apr 2001 |
| Mobil-University "19" O-10-33621 | Rust Oil Corp. only | Fullerton (San Andres) | Andrews | 1 | 2.05K | 12 | by Jan 1993 – Mar 1994 |
| Kincaid, A. R. Trust "D" O-9-12940 | Texaco E & P Inc. only | Davidson Ranch (Canyon 6200) | Crockett | 1 | 2.03K | 27K | by Jan 1993 – Oct 1995 |
| Hoffman Trust O-6-13137 | TGNR East Texas LLC only | Carthage (Travis Peak-Smith) | Panola | 1 | 2.02K | 9.61K | by Jan 1993 – Sep 1996 |
| Alliance Trust O-11-5808 | Abraxas Production Corporation only | Sharon Ridge (2400) | Scurry | 3 | 2K | 3 | by Jan 1993 – Mar 1993 |
| Boring, G W Trustee GU 5 (AW) O-13-34420 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 1.97K | 534K | Jul 2025 – Aug 2026 |
| Finch Family Trust GU O-3-27408 | Hilcorp Energy Company only | Angelina (10,800) | Chambers | 1 | 1.97K | 1.9K | Jan 2018 – Jun 2020 |
| Walker-Buckler Trust O-8-22637 | Campbell, T. K. only | McCoy, SW. (Miss.) | Throckmorton | 2 | 1.96K | 45 | by Jan 1993 – Dec 1998 |
| Emerald Unit O-8-23449 | Goopco, Inc. only | Rust Creek (Miss) | Throckmorton | 1 | 1.96K | 21 | by Jan 1993 – Feb 2001 |
| Winans Living Trust O-1-10800 | Calfas Cattle & Oil, LLC only | Somerset | Atascosa | 7 | 1.94K | 46 | by Jan 1993 – Aug 2026 |
| Moss, Paul Estate O-10-34940 | Rust Oil Corp. only | Harper | Ector | 2 | 1.91K | 304 | Aug 1996 – Aug 2013 |
| Maxwell Trust "A" O-8-28577 | Upham Oil & Gas Company only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 1.9K | 53.8K | Jan 1999 – Sep 2008 |
| Martin Trust O-8-26628 | Midland Oil and Gas, Inc. only | Frankirk (Ellenburger) | Stonewall | 1 | 1.83K | 784 | by Jan 1993 – Dec 1993 |
| Iowa Realty Trust "A" O-10-24049 | N & O Oil Co. only | Pecos Valley (High Gravity) | Pecos | 8 | 1.82K | 8.04K | by Jan 1993 – Aug 1998 |
| Strange, Douglas D. O-13-20689 | Strange, Joyce Marital Trust only | Archer County Regular | Archer | 1 | 1.76K | 21 | by Jan 1993 – Sep 2006 |
| T. P. Land & Trust "A" O-10-25112 | Occidental Permian Ltd. only | Cowden, North | Ector | 1 | 1.66K | 924 | by Jan 1993 – Mar 1995 |
| Young, T. D. Trust O-8-20952 | Ogs Operating Company, Inc. only | T. D. Y. (Ellenburger) | Nolan | 1 | 1.62K | 13 | by Jan 1993 – Jan 1994 |
| Anthony, James E. Trustee O-6-5526 | Triple L Operating Company LLC only | Marion County (Shallow) | Marion | 1 | 1.6K | 20 | by Jan 1993 – Oct 2003 |
| Frost National Bank Trustee O-1-14528 | Carrizo Exploration, Inc. only | Dent Ingram (Olmos 1) | Dimmit | 1 | 1.58K | 6.44K | Jul 2004 – Mar 2007 |
| Dcrc Section 88 O-4-13558 | Dewbre, Jerry C., Trustee only | Arnold-Mulle (Mirando, UP) | Duval | 1 | 1.57K | 0 | Apr 2009 – May 2014 |
| Coates Energy Trust, Etal O-4-10716 | Magnum Engineering Company only | Rincon, North (4350) | Starr | 1 | 1.55K | 7.91K | by Jan 1993 – Nov 1993 |
| Everett -C- O-7-7670 | Aaa Oil Trust only | East Texas | Upshur | 2 | 1.5K | 6 | Jul 1993 – Aug 1999 |
| Thorpe O-8-14985 | Edmison, M. Trust #2 only | Stephens County Regular | Stephens | 1 | 1.47K | 14 | by Jan 1993 – Jul 1996 |