| Glass 308 O-14-8486 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 2 | 215K | 1.54M | Feb 2011 – Aug 2026 |
| Alma O-10-6960 | Highmark Energy Operating, LLC only | TXL (Ellenburger) | Ector | 5 | 213K | 616K | by Jan 1993 – Aug 2026 |
| Mark Brown Allocation B G-1-297017 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 212K | 418K | Nov 2022 – Aug 2026 |
| CNB Trustees 360 O-14-7490 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 4 | 210K | 2.22M | Jan 2004 – Aug 2026 |
| Glass O-10-32512 | Landmark IP, LLC only | Garden City, S. (Wolfcamp) | Glasscock | 7 | 209K | 2.13M | by Jan 1993 – Jun 2026 |
| TXL -G- O-10-25740 | Highmark Energy Operating, LLC only | Cowden, North | Ector | 4 | 209K | 281K | by Jan 1993 – Aug 2026 |
| Shell-Perkins O-10-28453 | Highmark Energy Operating, LLC only | Deep Rock (Penn.) | Andrews | 10 | 205K | 385K | by Jan 1993 – Aug 2026 |
| Railroad Unit O-8-27153 | Shidler, Mark L., Inc. only | Alyssa-Sadie (Canyon Reef) | Jones | 2 | 200K | 97 | Apr 1994 – Aug 2026 |
| Mark Brown Allocation C O-1-21190 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 199K | 377K | Nov 2022 – Aug 2026 |
| Cooper 435 O-14-7883 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 4 | 196K | 2.15M | Jul 2008 – Apr 2020 |
| Malinda 745 G-14-288241 | Highmark Energy Operating, LLC only | Allen-Parker (Marmaton) | Ochiltree | 1 | 195K | 1.08M | Nov 2018 – Aug 2026 |
| Edinburg Unit G-4-168718 | Royal Production Company, Inc. only | Edinburg, S. (Marks 11030) | Hidalgo | 1 | 194K | 7.22M | Jan 1998 – Mar 2011 |
| Swink 402 O-14-8417 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 1 | 191K | 965K | Apr 2011 – Aug 2026 |
| Rader 251 O-14-8690 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 3 | 184K | 2.65M | Aug 2012 – Aug 2026 |
| Smith, Howard, Fee O-3-2969 | Qri Industries, Inc. only | Markham | Matagorda | 34 | 183K | 20 | by Jan 1993 – Aug 2026 |
| Mark O-14-3828 | Bce-Mach III LLC only | Panhandle Gray County Field | Gray | 10 | 179K | 257K | by Jan 1993 – Aug 2026 |
| Rogers 385 O-14-8528 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 2 | 179K | 1.41M | Apr 2012 – Aug 2026 |
| Cooper 357 O-14-7840 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 2 | 177K | 1.43M | Feb 2008 – Aug 2026 |
| Branch Estate O-11-64719 | Shidler, Mark L., Inc. only | Hot Springs | Kent | 3 | 176K | 287 | by Jan 1993 – Aug 2026 |
| Sanders 391 O-14-8582 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 1 | 170K | 675K | Apr 2011 – Aug 2026 |
| Hill 433 O-14-8146 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 4 | 169K | 1.66M | Apr 2010 – Aug 2026 |
| Marrable, Ruth O-6-12315 | Rockwall Marketing Corporation only | Redwater (Smackover) | Bowie | 1 | 168K | 165K | by Jan 1993 – Jan 1998 |
| Bunk, J.F. O-3-19915 | Shidler, Mark L., Inc. only | Lucky, South (9300-B) | Matagorda | 1 | 165K | 15K | by Jan 1993 – Dec 2012 |
| Wilcox Oil U 2 O-3-21425 | Danmark Energy Services, Inc. only | Jacks Creek (Wilcox E) | Tyler | 1 | 160K | 257K | by Jan 1993 – May 2004 |
| Brownlee 128 O-14-8629 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 2 | 158K | 588K | Jun 2012 – Aug 2026 |
| Wallville 321 O-14-8857 | Highmark Energy Operating, LLC only | Pan Petro (Cleveland) | Ochiltree | 2 | 158K | 1.49M | Jan 2013 – Aug 2026 |
| E. F. King O-10-42650 | Highmark Energy Operating, LLC only | Fuhrman (Glorieta) | Andrews | 2 | 155K | 1.78K | Apr 2012 – Aug 2026 |
| Braum 709 O-14-8510 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 2 | 155K | 2.17M | Feb 2012 – Aug 2026 |
| Waters Ranch 330 O-14-8459 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 2 | 152K | 1.79M | Sep 2011 – Aug 2026 |
| Alma O-10-18022 | Highmark Energy Operating, LLC only | TXL (Tubb) | Ector | 6 | 151K | 303K | by Jan 1993 – Aug 2026 |
| Grammer, J. A. O-11-67926 | Geomark Resources, L.L.C. only | Lindsey (Strawn) | Dawson | 1 | 149K | 0 | Apr 1998 – Aug 2026 |
| Castleberry, A. A. O-7-7505 | Danmark Energy Services, Inc. only | East Texas | Gregg | 14 | 147K | 49.2K | by Jan 1993 – Nov 2006 |
| Barrett-Marks O-3-26280 | Vess Oil Corporation only | Madisonville, W. (Woodbine -A-) | Madison | 1 | 146K | 98K | Feb 2013 – Aug 2026 |
| CNB "G" 345 O-14-7678 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 3 | 144K | 939K | Jul 2006 – Aug 2026 |
| Cooper 348 O-14-7627 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 4 | 142K | 864K | Jan 2006 – Aug 2026 |
| J.H. Dickerson O-6-16012 | Highmark Energy Operating, LLC only | Fairway (Rodessa) | Henderson | 2 | 141K | 214K | Jul 2023 – Aug 2026 |
| Miles, Hayden -A- O-10-8249 | Highmark Energy Operating, LLC only | Deep Rock (Ellenburger) | Andrews | 1 | 140K | 70.4K | by Jan 1993 – Feb 2020 |
| Davis, L. T. O-10-11206 | Highmark Energy Operating, LLC only | Fuhrman-Mascho (Devonian) | Andrews | 2 | 140K | 514K | by Jan 1993 – Aug 2026 |
| Doyle 708 O-14-8475 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 2 | 133K | 1.63M | Nov 2011 – Aug 2026 |
| Davis, L. T. O-10-1720 | Highmark Energy Operating, LLC only | Fuhrman-Mascho | Andrews | 12 | 129K | 201K | by Jan 1993 – Feb 2023 |
| Markert-Brown O-3-25255 | North Lake Resources LLC only | Giddings (Austin Chalk-3) | Lee | 2 | 127K | 137K | Sep 2008 – Mar 2021 |
| University -F- O-10-5508 | Highmark Energy Operating, LLC only | Shafter Lake (Devonian) | Andrews | 2 | 126K | 46.9K | by Jan 1993 – Aug 2026 |
| Trosper 362 O-14-8508 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 2 | 126K | 1.49M | Apr 2012 – Aug 2026 |
| Ohio-Sun Unit O-3-11585 | Goldking Minerals Mgmt, L.L.C. only | Markham,n.-Bay City,n (7685) | Matagorda | 9 | 120K | 139K | by Jan 1993 – Jun 2024 |
| University 173 O-10-28762 | Highmark Energy Operating, LLC only | Shafter Lake (Ellenburger) | Andrews | 2 | 119K | 14.7K | by Jan 1993 – May 2016 |
| Cook, L.D. O-1-12969 | Shidler, Mark L., Inc. only | Mag (Austin Chalk) | Gonzales | 1 | 117K | 7.24K | by Jan 1993 – Aug 2026 |
| Clay, H. R.-E- O-10-41290 | Landmark IP, LLC only | Howard Glasscock (Consolidated) | Howard | 59 | 116K | 0 | Dec 2011 – May 2026 |
| Edinburg Unit G-4-197653 | Royal Production Company, Inc. only | Edinburg, S. (Marks 11030) | Hidalgo | 1 | 115K | 9.6M | Sep 2003 – Sep 2020 |
| Mark Brown O-1-15844 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 115K | 283K | Apr 2012 – Aug 2026 |
| Jones Trust 359 O-14-7842 | Highmark Energy Operating, LLC only | Lipscomb (Cleveland) | Lipscomb | 3 | 114K | 901K | Feb 2008 – Feb 2020 |