| Amarilla, Rosa G-4-169717 | Varas Energy Operating Company, only | Santa Ana (Marks) | Hidalgo | 1 | 944K | 17.6M | Jul 1998 – Apr 2026 |
| Santa Ana G-4-169296 | Varas Energy Operating Company, only | Santa Ana (Marks) | Hidalgo | 1 | 582K | 9.97M | Jun 1998 – Apr 2026 |
| Edinburg Unit G-4-153314 | Royal Production Company, Inc. only | Edinburg (Lower Marks A) | Hidalgo | 1 | 259K | 6.63M | Nov 1994 – Sep 1999 |
| Mark Brown Allocation A G-1-296816 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 229K | 360K | Nov 2022 – Apr 2026 |
| Mark Brown Allocation B G-1-297017 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 207K | 395K | Nov 2022 – Apr 2026 |
| Malinda 745 G-14-288241 | Highmark Energy Operating, LLC only | Allen-Parker (Marmaton) | Ochiltree | 1 | 194K | 1.06M | Nov 2018 – Apr 2026 |
| Edinburg Unit G-4-168718 | Royal Production Company, Inc. only | Edinburg, S. (Marks 11030) | Hidalgo | 1 | 194K | 7.22M | Jan 1998 – Mar 2011 |
| Edinburg Unit G-4-197653 | Royal Production Company, Inc. only | Edinburg, S. (Marks 11030) | Hidalgo | 1 | 115K | 9.6M | Sep 2003 – Sep 2020 |
| Fairway/James Lime/Unit G-6-181540 | Highmark Energy Operating, LLC only | Fairway (James Lime) | Anderson | 1 | 112K | 9.15M | Mar 2001 – Apr 2026 |
| Edinburg Unit G-4-175355 | Royal Production Company, Inc. only | Edinburg (Upper Marks "C") | Hidalgo | 1 | 95K | 12.1M | Sep 1999 – Dec 2019 |
| Stringfield, Tommye G-5-123556 | Highmark Energy Operating, LLC only | Sand Trap (James Lime) | Henderson | 1 | 93.1K | 20.2M | Jan 1993 – Apr 2026 |
| Fairway/James Lime/Unit G-6-226134 | Highmark Energy Operating, LLC only | Fairway (James Lime) | Anderson | 1 | 87.8K | 12.2M | Feb 2007 – Apr 2026 |
| Roberts/Miller-Holloway G.U. G-5-124987 | Highmark Energy Operating, LLC only | Sand Trap (James Lime) | Henderson | 1 | 87.3K | 25.3M | Jan 1993 – Mar 2023 |
| Doyle, J.B. G-14-266422 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 85.8K | 974K | Dec 2011 – Jul 2021 |
| Price, Willis D. G-14-267668 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 84.9K | 718K | Apr 2012 – Apr 2026 |
| Sorenson Gas Unit G-4-161981 | Wagner Oil Company only | Donna (Marks) | Hidalgo | 1 | 81K | 3.97M | Jan 1997 – Apr 2026 |
| Hightower et al GU 1 G-5-111323 | Highmark Energy Operating, LLC only | Moore Station (James Lime) | Henderson | 1 | 78.8K | 19.2M | Jan 1993 – Sep 2024 |
| Doyle, J.B. G-14-266375 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 75K | 1.22M | Jun 2011 – Apr 2026 |
| Edinburg Unit G-4-199312 | Royal Production Company, Inc. only | Edinburg, S. (Marks 11030) | Hidalgo | 1 | 61.7K | 8.05M | Nov 2003 – Jul 2014 |
| Doyle, Robert B. G-14-266559 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 59.8K | 644K | Sep 2010 – Apr 2023 |
| Doyle, Robert B G-14-278802 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 58.8K | 596K | Feb 2015 – Apr 2026 |
| Reba N Miller G-14-282340 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 58.8K | 858K | Mar 2017 – Apr 2026 |
| Marks G-6-187192 | Permian Natural Resources only | Concord Dome (Rodessa) | Anderson | 1 | 57.2K | 688K | Jul 2001 – Oct 2021 |
| Doyle, Robert B G-14-266469 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 55.4K | 358K | Sep 2011 – Sep 2022 |
| Price, Willis D. G-14-265459 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 54.8K | 646K | Jan 2011 – Nov 2017 |
| Doyle, Robert 'B' G-14-279623 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 52.6K | 782K | Feb 2015 – Apr 2026 |
| Doyle, Robert B G-14-267105 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 49.1K | 118K | Apr 2011 – Sep 2019 |
| Patos Gas Unit G-3-146623 | Shidler, Mark L., Inc. only | Eagle's Claw (Yegua) | Wharton | 1 | 48.6K | 2.07M | Jul 1993 – Sep 2018 |
| Degoche, Louise G-4-256218 | Dewbre Petroleum Corporation only | Landa (Marks) | Hidalgo | 1 | 48K | 10.5M | May 2010 – Apr 2026 |
| Uvacek G-3-189840 | Shidler, Mark L., Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 47.2K | 987K | May 2002 – May 2012 |
| Doyle, Robert B G-14-278576 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 45.6K | 492K | Feb 2015 – Apr 2026 |
| Fairway/James Lime/Unit G-6-208429 | Highmark Energy Operating, LLC only | Fairway (James Lime) | Anderson | 1 | 45.1K | 2.49M | Feb 2005 – Apr 2025 |
| Harry Parker 697 G-14-281852 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 43.4K | 593K | Nov 2016 – Apr 2026 |
| Keystone Mills Co. G-3-190753 | Highmark Energy Operating, LLC only | Conroe (Middle Wilcox Cons.) | Montgomery | 1 | 41.9K | 5.49M | Jan 2002 – Sep 2007 |
| Reba N Miller G-14-282298 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 39.8K | 668K | Mar 2017 – Apr 2026 |
| Harry Parker 697 G-14-281831 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 38.1K | 1.31M | Nov 2016 – Apr 2026 |
| Tyson, D. R. G-14-247369 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 37.1K | 714K | Dec 2008 – Apr 2026 |
| Price, Willis D. G-14-266379 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 37K | 260K | Nov 2011 – Mar 2023 |
| Doyle, J.B. G-14-267714 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 36.7K | 902K | Sep 2012 – Apr 2026 |
| Jacks Creek Oil Unit 2 G-3-204135 | Danmark Energy Services, Inc. only | Jacks Creek (Wilcox C) | Tyler | 1 | 35.1K | 1.02M | Aug 2004 – Dec 2006 |
| Doyle, J.B. G-14-209619 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 34.5K | 843K | Jan 2005 – Apr 2026 |
| Southwest Farm & Ranch-State G-4-168572 | Shell Western E&P only | Hinde, West (Marker III Sd.) | Starr | 1 | 33.8K | 2.29M | Dec 1997 – Aug 2005 |
| Reba N Miller G-14-266393 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 32.2K | 367K | Jun 2011 – Apr 2026 |
| Doyle, J.B. G-14-266374 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 31K | 282K | Jun 2011 – Aug 2015 |
| Exxon Mineral Fee G-3-153360 | Danmark Energy Services, Inc. only | Jacks Creek (Wilcox A) | Tyler | 1 | 29.7K | 561K | Jun 1995 – Oct 2001 |
| Fairway/James Lime/Unit G-6-209848 | Highmark Energy Operating, LLC only | Fairway (James Lime) | Henderson | 1 | 28.9K | 2.32M | Mar 2005 – Apr 2026 |
| Pharr Fieldwide Unit G-4-261700 | OXY USA Inc. only | Pharr (Marks) | Hidalgo | 1 | 28.8K | 1.85M | Sep 2010 – Aug 2012 |
| Price, WD -B- G-14-258033 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 28.8K | 686K | Feb 2010 – Apr 2026 |
| Doyle, Robert B G-14-266454 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 28K | 403K | Jul 2011 – Jan 2016 |
| Bibby G-6-133321 | Tidemark Exploration, Inc. only | Rodessa (Dees Young) | Cass | 1 | 27.6K | 162K | Jan 1993 – Jul 1999 |