| Begert Trust 44 G-14-247894 | Bce-Mach II LLC only | Begert (10,200) | Hemphill | 1 | 6.01K | 505K | Jan 2009 – Aug 2026 |
| Kincaid, A. R. Trust G-9-86155 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 6.01K | 611K | by Jan 1993 – Aug 2026 |
| Frost Trust 47 G-4-185491 | Hilcorp Energy Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 6K | 86.1K | Sep 2001 – Aug 2026 |
| C-Bruni Mineral Trust G-4-138312 | Hilcorp Energy Company only | Laredo (Lobo) | Webb | 1 | 5.97K | 643K | by Jan 1993 – Aug 2026 |
| Spencer Trust 20 O-10-46860 | SM Energy Company only | Spraberry (Trend Area) | Howard | 1 | 5.96K | 11K | Jun 2014 – Apr 2021 |
| Goff Mineral Trust G-2-184459 | Camoil, Inc. only | Goldenrod Creek (Goff) | Jackson | 1 | 5.96K | 949K | Aug 2001 – Jun 2005 |
| Frost Trust 15 G-4-185559 | Hilcorp Energy Company only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 5.95K | 624K | Sep 2001 – Aug 2026 |
| Downie Ranch -6- G-10-129838 | Sandridge Expl. and Prod., LLC only | Thistle (Overthrust) | Pecos | 1 | 5.94K | 303K | by Jan 1993 – Nov 2014 |
| Pearson, W.T. O-1-10045 | Trustar Operating Company Inc. only | Minerva-Rockdale | Milam | 33 | 5.94K | 70 | Nov 1994 – Nov 2017 |
| Kincaid, A. R. Trust 'C' G-9-50674 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.93K | 310K | by Jan 1993 – Aug 2026 |
| Cole Trust Stony G-13-188537 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 5.92K | 386K | Mar 2002 – Aug 2026 |
| 6ENDERSON Trust "BB" G-9-241611 | Red Stag Operating, LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.92K | 170K | Aug 2008 – Aug 2026 |
| Kincaid, A.R. Trust 'D' G-9-149669 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.92K | 466K | May 1994 – Aug 2026 |
| Snyder Mineral Trust 143 O-8-20715 | L.C.S. Production Company only | SMT (Cross Cut) | Callahan | 2 | 5.91K | 5.16K | by Jan 1993 – Dec 2000 |
| Marwill, N. L. G-6-207687 | Long Trusts, The only | Oak Hill (Cotton Valley) | Rusk | 1 | 5.9K | 766K | Feb 2005 – Jul 2026 |
| Meeker Trust O-10-34827 | RE-OP Corp. only | Orla, Southeast (Delaware) | Reeves | 1 | 5.9K | 2.1K | Feb 1996 – Jul 1999 |
| Kincaid, A. R. Trust O-9-14631 | Texaco E & P Inc. only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.9K | 84.8K | Aug 1997 – Mar 2001 |
| Bruni Mineral Trust G-4-135275 | Hilcorp Energy Company only | Liz (9200) | Webb | 1 | 5.88K | 2.33M | by Jan 1993 – Aug 2026 |
| Kincaid, A. R. Trust G-9-86363 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.86K | 690K | by Jan 1993 – Aug 2026 |
| Bartlett, H. M. O-6-11161 | Long Trusts, The only | Deu Pree (Woodbine) | Wood | 1 | 5.86K | 20 | by Jan 1993 – Oct 1997 |
| Buckler, J. Trust G-8-187480 | Dale Operating Company only | Caddo (3440) | Stephens | 1 | 5.85K | 762K | Jan 2002 – Jan 2025 |
| Bullinger Trust O-13-31700 | Addax Operating, LLC only | Bird (Atoka) | Clay | 1 | 5.85K | 5.09K | Aug 2010 – May 2015 |
| West Ranch G-10-230587 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 5.82K | 731K | Aug 2007 – Aug 2026 |
| Stewart Trust 1523 G-4-273190 | Lewis Petro Properties, Inc. only | Owen (Olmos) | Webb | 1 | 5.81K | 3.04M | Nov 2013 – Aug 2026 |
| Lyne Trust G-2-168311 | Edge Petroleum Oper. Co., Inc. only | Max, W. (Hockley 4300) | Live Oak | 1 | 5.77K | 189K | Dec 1997 – Nov 1999 |
| West Ranch G-10-200347 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 5.76K | 996K | Feb 2004 – Aug 2026 |
| Adami Trust O-9-16815 | S.B. Street Operating, Inc. only | Spike (Gardner) | Runnels | 1 | 5.73K | 6.83K | Dec 2008 – Dec 2014 |
| Alexander Omega Trust Lease O-13-33863 | Legacy Exploration, LLC I only | Dillard, SW. (Marble Falls) | Clay | 2 | 5.71K | 39.7K | Jan 2019 – Jul 2022 |
| Kincaid, A. R. Trust -D- G-9-50242 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.69K | 387K | by Jan 1993 – Aug 2026 |
| Buckler Trust O-8-26708 | Karper Company, The only | Tullos (Caddo) | Stephens | 1 | 5.69K | 65.6K | by Jan 1993 – Nov 2000 |
| Drennan Trust O-9-18440 | Retriever Operating LLC only | Elm Creek (Palo Pinto) | Runnels | 1 | 5.68K | 1.3K | Mar 2014 – Aug 2026 |
| Kincaid, A. R. Trust G-9-34890 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.65K | 363K | by Jan 1993 – Aug 2026 |
| Henderson Trust DD O-9-13828 | EOG Resources, Inc. only | Ozona (Canyon Sand, Oil) | Crockett | 1 | 5.63K | 158K | Jun 1995 – Aug 1998 |
| West Ranch G-10-230315 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 5.63K | 1.88M | Sep 2007 – Mar 2026 |
| Mitchell 8 G-9-198792 | Hilcorp Energy Company only | Pakenham (Thrusted) | Terrell | 1 | 5.62K | 1.6M | Jul 2003 – Aug 2026 |
| Citizens Natl. Bank Trustee -A- O-14-6554 | Amoco Production Company only | Coburn, SW (Tonkaw) | Lipscomb | 1 | 5.56K | 110K | by Jan 1993 – Nov 1998 |
| Begert Trust 44 G-14-247224 | Bce-Mach II LLC only | Begert (10,200) | Hemphill | 1 | 5.55K | 441K | Dec 2008 – Aug 2026 |
| Danville Gas Unit G-6-127812 | Long Trusts, The only | Danville (TP-CV Cons.) | Gregg | 1 | 5.55K | 217K | by Jan 1993 – Dec 2000 |
| Flowers Trust "A" G-14-82359 | Blackbeard Operating, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 5.54K | 292K | by Jan 1993 – Jun 2010 |
| Fleetwood Trust 16 G-14-228649 | Mmgl Txph, LLC only | West Park (Granite Wash) | Wheeler | 1 | 5.51K | 422K | May 2007 – Aug 2026 |
| University 36-3 G-9-156557 | White Rock Oil & Gas, LLC only | Pakenham (Thrusted) | Terrell | 1 | 5.47K | 304K | Aug 1995 – Aug 2026 |
| West Ranch G-10-248751 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 5.44K | 611K | Feb 2008 – Jan 2026 |
| Kincaid, A. R. Trust "B" G-9-118076 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.44K | 486K | by Jan 1993 – Aug 2026 |
| Kincaid, A. R. Trust G-9-48037 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.42K | 444K | by Jan 1993 – Aug 2026 |
| Kincaid, A. R. Trust 'D' G-9-144125 | Scout Energy Management LLC only | Davidson Ranch (Penn. 7890) | Crockett | 1 | 5.42K | 1.34M | by Jan 1993 – Jan 2001 |
| Kincaid, A. R. Trust G-9-179799 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.4K | 572K | Aug 2000 – Dec 2024 |
| Thompson Trustee Unit G-3-110273 | Hilcorp Energy Company only | Hitchcock, NE. (Frio 9100) | Galveston | 1 | 5.39K | 183K | by Jan 1993 – Apr 1995 |
| Kincaid, A. R. Trust "B" G-9-146068 | Scout Energy Management LLC only | Ozona, NE. (Canyon Sand) | Crockett | 1 | 5.39K | 315K | Jul 1993 – Aug 2026 |
| Cameron Minerals Trust G-3-227980 | Garrison Operating, L.L.C. only | Glendale (Woodbine 9900) | Trinity | 1 | 5.38K | 688K | Jun 2007 – Apr 2012 |
| Begert Trust 4 G-14-251019 | Bce-Mach II LLC only | Begert (10,200) | Hemphill | 1 | 5.38K | 476K | Mar 2009 – Aug 2026 |