| State Tract 352 G-3-170229 | Transtexas Gas Corporation only | Eagle Bay (Vicksburg 15750) | Galveston | 1 | 627K | 4.59M | Jun 1998 – Jul 2000 |
| State Tract 331 G-3-188919 | Talos QN Exploration LLC only | Eagle Bay (Vicksburg 15750) | Galveston | 1 | 566K | 3.05M | Mar 2002 – Dec 2012 |
| Womac 7557 Alloc. A G-10-299994 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 551K | 3.13M | Jan 2018 – Apr 2026 |
| State Tract 690/746 & 750 GU G-4-260767 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 523K | 2.64M | Mar 2011 – Apr 2026 |
| Sansom 3875 Alloc B G-10-288150 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 484K | 3.06M | Apr 2020 – Apr 2026 |
| Crowley Unit 7558 G-10-287049 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 444K | 2.29M | Apr 2019 – Apr 2026 |
| Furry G-3-282816 | Tri-C Resources Partners I, LLC only | Paul (LW-75) | Colorado | 1 | 406K | 4.21M | Mar 2017 – Apr 2026 |
| Furry G-3-284544 | Tri-C Resources Partners I, LLC only | Paul (LW-75) | Colorado | 1 | 405K | 3.7M | Apr 2018 – Apr 2026 |
| Dorothy-Sansom 3875 Alloc A G-10-288716 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 395K | 3.44M | Apr 2020 – Apr 2026 |
| Womac 5875 G-10-300362 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 358K | 1.81M | Mar 2017 – Apr 2026 |
| Crain-Black Stone A-375 G-6-220868 | Zarvona Energy LLC only | Brookeland (Austin Chalk, 8800) | Tyler | 1 | 349K | 1.46M | Mar 2006 – Apr 2026 |
| State Tract 750/750A GU G-4-232522 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 319K | 3.4M | Nov 2007 – Apr 2026 |
| Sansom 3875 Alloc C G-10-288285 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 316K | 2.48M | Apr 2020 – Apr 2026 |
| Sugarloaf 7475 6U G-10-294934 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 293K | 1.25M | Oct 2023 – Apr 2026 |
| Sugarloaf 7475 8U G-10-295608 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 292K | 1.28M | Oct 2023 – Apr 2026 |
| Sugarloaf 7475 2U G-10-289093 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 265K | 1.14M | Mar 2019 – Apr 2026 |
| Sugarloaf 7475 4U G-10-294668 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 263K | 987K | Oct 2023 – Apr 2026 |
| Sugarloaf 7475 1U G-10-289118 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 262K | 1.11M | Mar 2019 – Apr 2026 |
| State Tract 746A/750A GU G-4-260038 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 258K | 1.41M | Nov 2010 – Apr 2026 |
| Crowley 7527 Alloc. A G-10-288613 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 243K | 2.41M | Apr 2019 – Apr 2026 |
| Sugarloaf 7475 7U G-10-295149 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 241K | 988K | Oct 2023 – Apr 2026 |
| Sugarloaf 7475 9U G-10-295216 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 237K | 1.31M | Oct 2023 – Apr 2026 |
| Sugarloaf 7475 5U G-10-295440 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 224K | 1.2M | Oct 2023 – Apr 2026 |
| Dorothy-Sansom 3875 Alloc D G-10-288360 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 223K | 2.65M | Apr 2020 – Apr 2026 |
| Crowley Unit 7558 G-10-288523 | Apache Corporation only | Phantom (Wolfcamp) | Reeves | 1 | 212K | 1.49M | Apr 2019 – Apr 2026 |
| State Tract 75 "N" G-3-163951 | Davis Petroleum Corp. only | Umbrella Point, NE (Price Sand) | Chambers | 1 | 203K | 19.5M | Apr 1997 – Apr 2013 |
| State Tract 690/746 & 750 GU G-4-264784 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 190K | 1.01M | Oct 2011 – Jul 2025 |
| State Tract 690/746&750 GU G-4-248014 | Orx Resources, L.L.C. only | Nueces Bay Deep Consolidated | San Patricio | 1 | 188K | 5.26M | Nov 2008 – Apr 2026 |
| State Tract 690 746 & 750 GU G-4-241023 | Energy Twenty Operating LLC only | Nueces Bay Deep Consolidated | San Patricio | 1 | 181K | 4.85M | Jun 2008 – Sep 2012 |
| Scanio, Miguelita G-2-233636 | Digital Operating Company LLC only | Refugio-Fox (6750) | Refugio | 1 | 180K | 552K | Mar 2007 – Feb 2022 |
| Sugarloaf 7475 10U G-10-294104 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 179K | 996K | Oct 2023 – Apr 2026 |
| Greene, Birdie G-2-149249 | Wynn-Crosby Operating, Ltd. only | Birdie (Wilcox 11,750) | Karnes | 1 | 178K | 8.41M | Feb 1994 – Jan 2009 |
| Triangle 75 G-10-283491 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 177K | 731K | Aug 2016 – Apr 2026 |
| State Tract 690/746 & 750 GU G-4-261952 | Orx Resources, L.L.C. only | Nueces Bay Deep Consolidated | San Patricio | 1 | 171K | 2.46M | Jul 2011 – Feb 2024 |
| Champion Int'l Unit A-1175 G-6-155820 | Union Pacific Resources Company only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 159K | 833K | Jul 1995 – Jan 1999 |
| State Lease 108750 G-3-255232 | Ballard Exploration Company,inc. only | Victor Blanco, W. (8800) | Harris | 1 | 140K | 5.02M | May 2009 – Oct 2024 |
| State Tract 690/746 & 750 GU G-4-249323 | Energy Twenty Operating LLC only | Tule Lake (Frio Consolidated) | Nueces | 1 | 120K | 401K | Jun 2009 – Jan 2017 |
| Parnell 475 G-14-275351 | Unbridled Resources, LLC only | Pan Petro (Cleveland) | Ochiltree | 1 | 109K | 1.22M | Nov 2013 – Apr 2026 |
| State Tract 690/746 & 750 GU G-4-275285 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 106K | 1.05M | May 2014 – Apr 2026 |
| Guild G-3-288518 | Tri-C Resources Partners I, LLC only | Paul (LW-75) | Colorado | 1 | 105K | 6.66M | Nov 2019 – Apr 2026 |
| State Tract 690/746 & 750 GU G-4-256726 | Energy Twenty Operating LLC only | Nueces Bay Deep Consolidated | San Patricio | 1 | 100K | 1.04M | Jun 2010 – Feb 2014 |
| State Tract 750/750A GU G-4-261702 | Orx Resources, L.L.C. only | Tule Lake (Frio Consolidated) | Nueces | 1 | 96.4K | 439K | Apr 2011 – Apr 2026 |
| Michel, M. C. Gas Unit G-3-154819 | F.I.G. Energy, LLC only | Deckers Prairie (Wilcox 10750) | Montgomery | 1 | 96K | 1.51M | Feb 1995 – Dec 2012 |
| DK Boyd 75-14 Gas Unit G-10-239286 | Anadarko E&P Onshore LLC only | Haley (Lwr. Wolfcamp-Penn Cons.) | Loving | 1 | 89.5K | 11M | Nov 2007 – Apr 2026 |
| Camber Gas Unit G-2-239431 | Whiting Oil and Gas Corporation only | Birdie (Wilcox 11,750) | Karnes | 1 | 79.9K | 1.94M | May 2008 – Feb 2011 |
| BP America 757 G-3-198114 | Eqv Operating LLC only | Village Mills, W. (Wilcox 8900) | Hardin | 1 | 71.5K | 4.42M | Nov 2003 – Feb 2014 |
| Wright 75 G-14-271454 | BE Anadarko II, LLC only | Lipscomb, S.E. (Cleveland) | Lipscomb | 1 | 64.1K | 289K | Feb 2013 – Jul 2023 |
| State Tract 746A/750A GU G-4-258758 | Energy Twenty Operating LLC only | Tule Lake (Frio Consolidated) | Nueces | 1 | 64K | 426K | Oct 2010 – Mar 2016 |
| Obenhaus G-3-282057 | Lakeshore Operating, LLC only | Paul (LW-75) | Colorado | 1 | 64K | 1.23M | Dec 2015 – Apr 2026 |
| University "18-30A" G-10-185571 | WTG Exploration only | Quito, E. (Bell Canyon 5275) | Ward | 1 | 58.5K | 563K | Jul 2001 – Apr 2026 |