| Bruni Mineral Trust "B" G-4-130740 | Chevron U. S. A. Inc. only | La Perla (Lobo Cons.) | Webb | 1 | 603 | 503K | by Jan 1993 – Feb 2006 |
| West Ranch G-10-251350 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 602 | 1.12M | Oct 2008 – Mar 2022 |
| Bruni Mineral Trust 'A' G-4-141742 | Hilcorp Energy Company only | Cerrito Creek (Lobo) | Webb | 1 | 601 | 1.77M | by Jan 1993 – Aug 2026 |
| West Ranch G-10-234813 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 598 | 3.1M | Sep 2007 – Jul 2026 |
| Los Ojuelos Mineral Trust G-4-241562 | Evans, S. Lavon Jr. Oper. Co. only | Pancho (Wilcox) | Webb | 1 | 595 | 102K | Jun 2007 – Feb 2009 |
| Mitchell-State 10 G-9-154808 | BRP Energy, LLC only | Pakenham (Thrusted) | Terrell | 1 | 592 | 130K | Jun 1995 – Jul 2024 |
| West Ranch G-10-251101 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 592 | 253K | Oct 2008 – Aug 2026 |
| USA Trust G-13-251980 | XTO Energy Inc. only | Newark, East (Barnett Shale) | Denton | 1 | 591 | 27.5K | May 2009 – May 2009 |
| Bruni Mineral Trust G-4-80432 | Chevron U. S. A. Inc. only | Laredo (Lobo) | Webb | 1 | 588 | 72.5K | by Jan 1993 – Sep 1998 |
| Trust "558" G-8-152310 | Van Operating, Ltd. only | Hillview (Caddo) | Shackelford | 1 | 587 | 56.7K | Nov 1994 – Jan 1998 |
| Longfellow G-10-170848 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 586 | 7.34M | Sep 1998 – Apr 2024 |
| West Ranch G-10-240176 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 585 | 1.22M | Dec 2007 – Aug 2026 |
| West Ranch G-10-217786 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 582 | 771K | May 2006 – Aug 2026 |
| Henderson Trust "OO" G-9-152141 | Red Stag Operating, LLC only | Ozona (Canyon Sand) | Crockett | 1 | 581 | 466K | Nov 1994 – Aug 2026 |
| Rust, Arnold Unit 2 G-6-104316 | Brookston Energy, Inc. only | Oak Hill (Cotton Valley) | Rusk | 1 | 580 | 546K | by Jan 1993 – Aug 2026 |
| Douglas Mineral Trust O-13-5498 | Prickett Operating Company only | Wichita County Regular | Wichita | 3 | 572 | 21 | by Jan 1993 – Sep 1996 |
| West Ranch G-10-194416 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 571 | 5.27M | Apr 2003 – Aug 2026 |
| Cowden Ranch -6- O-10-32245 | Rust Oil Corp. only | Donnelly (San Andres) | Ector | 1 | 569 | 606 | by Jan 1993 – Aug 1993 |
| Benavides Trust G-4-197724 | Merit Energy Company only | Hundido (Lobo) | Zapata | 1 | 568 | 872K | Oct 2003 – Aug 2026 |
| Watson Camp Trust -B- O-1-9131 | U. D. Man, Inc. only | Somerset | Atascosa | 1 | 567 | 20 | by Jan 1993 – Apr 2002 |
| McCord Trust B G-2-255113 | Spiller Operating Co., Inc. only | Dallas Husky (Cook Mtn.) | Goliad | 1 | 563 | 127K | Feb 2010 – May 2012 |
| West Ranch G-10-249731 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 563 | 2.44M | Feb 2008 – Jun 2025 |
| O'Conner -D- O-2-6133 | Long Trusts, The only | Lake Pasture (FS-545) | Refugio | 1 | 561 | 12.9K | by Jan 1993 – Nov 1993 |
| 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 |
| Flowers Trust "A" O-14-4455 | Exxon Corp. only | Mendota, NW. (Douglas, Lo.) | Roberts | 3 | 554 | 9.15K | by Jan 1993 – Jul 1993 |
| West Ranch G-10-239312 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 552 | 221K | Dec 2007 – Aug 2026 |
| Dinn, Mineral Trusts G-4-133566 | Hilcorp Energy Company only | Guerra (Elvella) | Webb | 1 | 551 | 677K | by Jan 1993 – 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 |
| 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 |
| Patranella Trust O-3-26239 | Centex Energy, LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 542 | 227 | Apr 2012 – Jun 2013 |
| 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 |
| Cole Trust "C" G-13-180734 | BKV Barnett II, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 527 | 205K | Nov 2000 – Feb 2017 |
| Allison G-10-239069 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 527 | 7.26M | Mar 2008 – Mar 2024 |
| Bruni Mineral Trust "A" G-4-224425 | Hilcorp Energy Company only | Cerrito Creek (Lobo) | Webb | 1 | 526 | 339K | Oct 2006 – Aug 2026 |
| West Ranch G-10-234724 | Longfellow Energy, LP only | Pinon (Overthrust) | Pecos | 1 | 526 | 217K | Dec 2007 – Feb 2025 |
| 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 |