| Ludeman 2512 C G-10-292434 | COG Operating LLC only | Phantom (Wolfcamp) | Loving | 1 | 556K | 725K | Oct 2019 – Aug 2026 |
| Ludeman 2512 E G-10-292437 | COG Operating LLC only | Phantom (Wolfcamp) | Loving | 1 | 555K | 1.02M | Oct 2019 – Aug 2026 |
| Ludeman 2512 B G-10-292433 | COG Operating LLC only | Phantom (Wolfcamp) | Loving | 1 | 456K | 1.24M | Oct 2019 – Aug 2026 |
| State Tract 251 Unit G-3-185396 | Davis Petroleum Corp. only | Vinceburg (Boxcar) | Chambers | 1 | 383K | 7.67M | Jan 2001 – Feb 2012 |
| Alyse 51 Unit G-10-289207 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Ward | 1 | 344K | 4.45M | Oct 2019 – Aug 2026 |
| Alyse 51 Unit G-10-294758 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Ward | 1 | 332K | 2.86M | Apr 2022 – Aug 2026 |
| Sro 551 Alloc B G-10-287131 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 314K | 2.43M | Jul 2019 – Aug 2026 |
| Alyse 51 Unit G-10-294757 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Ward | 1 | 311K | 2.6M | Apr 2022 – Aug 2026 |
| Ludeman 2512 D G-10-292435 | COG Operating LLC only | Phantom (Wolfcamp) | Loving | 1 | 286K | 693K | Oct 2019 – Aug 2026 |
| Knight 4-51 G-10-283964 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Reeves | 1 | 272K | 1.57M | Nov 2017 – Aug 2026 |
| Naylor Jones Unit 51 G-1-292436 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | La Salle | 1 | 259K | 596K | Jun 2014 – Aug 2026 |
| State Tract 251 Unit G-3-192729 | Davis Petroleum Corp. only | Vinceburg (Vicksburg) | Chambers | 1 | 252K | 4.9M | Jan 2003 – May 2015 |
| Sro 551 Alloc. A G-10-285597 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 1 | 243K | 2.05M | Jul 2018 – Aug 2026 |
| Alyse 51 Unit G-10-294759 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Ward | 1 | 227K | 3.97M | Apr 2022 – Aug 2026 |
| Mathers Ranch 1518-158 CL EX G-14-286723 | Mmgl Txph, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 212K | 1.84M | Dec 2018 – Aug 2026 |
| Mathers Ranch 1518-157 CL WX G-14-286528 | Mmgl Txph, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 184K | 1.55M | Nov 2018 – Aug 2026 |
| State Tract 251 Unit G-3-175457 | Davis Petroleum Corp. only | Vinceburg (Vicksburg) | Chambers | 1 | 182K | 3.15M | Sep 1999 – Nov 2000 |
| Wright 151 G-14-264954 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 148K | 5.36M | Feb 2011 – Aug 2026 |
| Knight 4-51 G-10-271644 | Permian Resources Operating, LLC only | Phantom (Wolfcamp) | Reeves | 1 | 123K | 2.81M | Sep 2013 – Aug 2026 |
| Mathers Ranch 1518-2 (AW) G-14-279291 | Mmgl Txph, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 119K | 1.52M | Aug 2013 – Aug 2026 |
| Mathers Ranch 1518 (Allocation) G-14-276358 | Mmgl Txph, LLC only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 118K | 1.25M | Aug 2013 – Aug 2026 |
| Matagorda Island 519-L Gas Unit G-3-184382 | Fieldwood Energy LLC only | Matagorda Isl. BLK 519-L (15600) | Matgrda IS-LB | 1 | 92.7K | 52.5M | Aug 2000 – Aug 2017 |
| Storey 151 G-1-255180 | Lewis Petro Properties, Inc. only | Hawkville (Eagleford Shale) | La Salle | 1 | 83.3K | 1.34M | Dec 2009 – Jul 2026 |
| Matagorda Island 519-L Gas Unit G-3-119123 | Fieldwood Energy LLC only | Matagorda Isl. BLK 519-L (15600) | Matgrda IS-LB | 1 | 75.9K | 47.8M | by Jan 1993 – Jan 2000 |
| Matagorda Island 519-L Gas Unit G-3-109101 | Fieldwood Energy LLC only | Matagorda Isl. BLK 519-L (15600) | Matgrda IS-LB | 1 | 72.7K | 71.1M | by Jan 1993 – Apr 2014 |
| Mathers 1518-165 G-14-283066 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 71K | 2.55M | May 2017 – Aug 2026 |
| Mathers-Studer 1518-4 G-14-283047 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 59.8K | 1.13M | May 2017 – Aug 2026 |
| Young 51-66 MG EX G-14-285035 | Mmgl Txph, LLC only | Hemphill (Granite Wash.) | Hemphill | 1 | 56.6K | 1.85M | Jun 2018 – Aug 2026 |
| State Tract 563-L G-2-114520 | Reunion Energy Company only | Matagorda Block 563-L (6517) | Matgrda IS-LB | 1 | 52.3K | 127K | by Jan 1993 – Apr 1994 |
| Mathers Ranch 166-1518 (AW) G-14-276653 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 46.2K | 1.52M | Jan 2015 – Aug 2026 |
| Young 51-66 MD EX G-14-284855 | Mmgl Txph, LLC only | Hemphill (Granite Wash.) | Hemphill | 1 | 42.2K | 5.51M | Jun 2018 – Aug 2026 |
| Wright 151 G-14-270967 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 40K | 2.95M | Jul 2012 – Aug 2026 |
| Hostutler 451 A G-14-297493 | Mewbourne Oil Company only | Lipscomb, S.E. (Cleveland) | Lipscomb | 1 | 39.6K | 732K | Apr 2024 – Aug 2026 |
| Pundt 517 G-14-234112 | United Oil & Shale LLC only | Lipscomb, S.E. (Cleveland) | Lipscomb | 1 | 27.2K | 418K | Nov 2007 – Dec 2022 |
| Hart Estate 451 G-13-251419 | Texxol Operating Company, Inc. only | Newark, East (Barnett Shale) | Palo Pinto | 1 | 25.1K | 393K | Sep 2008 – Aug 2026 |
| Cheryl "51" G-8-212084 | Texxol Operating Company, Inc. only | Walker-Davis (Marble Falls) | Stephens | 1 | 25.1K | 242K | Nov 2005 – Aug 2026 |
| Wright 151 G-14-272716 | Mmgl Txph, LLC only | Mathers Ranch (Granite Wash) | Hemphill | 1 | 22.2K | 1.1M | Mar 2013 – Aug 2026 |
| Hirsch Estate 517 G-4-183728 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 21K | 696K | Mar 2001 – Feb 2006 |
| Moses 519 G-14-290777 | Presidio Petroleum LLC only | Lipscomb, S.E. (Cleveland) | Lipscomb | 1 | 20.3K | 283K | Jan 2019 – Aug 2026 |
| Whitten -51- G-9-57222 | Miltex Oil Company only | Page Ranch (Canyon) | Schleicher | 1 | 18.5K | 1.6M | by Jan 1993 – Aug 2019 |
| Bentsen Bros. "B" G-4-216783 | Merit Energy Company only | La Copita (Frio 5100) | Starr | 1 | 18.4K | 769K | Mar 2006 – Oct 2008 |
| Goode, S. A-151 G-6-168793 | Delfin Operating, LLC only | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 16.5K | 579K | Feb 1998 – Aug 2026 |
| Meador 1451 G-1-273616 | Lewis Petro Properties, Inc. only | Briscoe Ranch (Eagleford) | Webb | 1 | 15.9K | 4.79M | Nov 2013 – Aug 2026 |
| Hirsch Estate 517 G-4-138518 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 15.3K | 1.45M | by Jan 1993 – Aug 2026 |
| Hirsch, I. Estate 517 G-4-133791 | Hilcorp Energy Company only | Big Cowboy (Lobo) | Webb | 1 | 15.1K | 2.02M | by Jan 1993 – Aug 2026 |
| University 12 "E" G-9-118899 | Ozark Exploration, Inc. only | Block 51 (Strawn) | Crockett | 1 | 14.5K | 1.64M | by Jan 1993 – May 2024 |
| Roscher, W. C. 518 G-4-184853 | Conocophillips Company only | Big Cowboy (Lobo) | Webb | 1 | 14.4K | 590K | May 2001 – Feb 2006 |
| Meador 1451 G-1-270931 | Lewis Petro Properties, Inc. only | Briscoe Ranch (Eagleford) | Webb | 1 | 14.2K | 2.35M | Aug 2012 – Jul 2026 |
| Calloway, A. B. G-13-95278 | Riverbirch Resources, LLC only | Ken-Rich (Conglomerate 5100) | Jack | 1 | 13.8K | 527K | by Jan 1993 – Aug 2026 |
| Meador 1451 G-1-271560 | Lewis Petro Properties, Inc. only | Briscoe Ranch (Eagleford) | Webb | 1 | 13.7K | 3.17M | Nov 2012 – Aug 2026 |