| Obrien, G. W., Etal O-10-7338 | Two P Partners, LLC only | Ward-Estes, North | Ward | 2,066 | 31.3M | 30.6M | Jan 1993 – Jul 2026 |
| Hutchings Stock Assn. O-10-7337 | Two P Partners, LLC only | Ward-Estes, North | Ward | 1,671 | 26.8M | 20.2M | Jan 1993 – Jul 2026 |
| Keystone Holt Unit O-10-20730 | Bopco, L.P. only | Keystone (Holt) | Winkler | 164 | 6.49M | 13.6M | Jan 1993 – Jan 2016 |
| Sealy Ranch O-10-50245 | Halcon Operating Co., Inc. only | Phantom (Wolfcamp) | Ward | 41 | 6.33M | 17.5M | May 2017 – Jul 2026 |
| University 20 PW Unit O-10-44020 | Pdeh LLC only | Phantom (Wolfcamp) | Winkler | 32 | 5.94M | 7.3M | Jun 2013 – Mar 2023 |
| Sealy Smith Foundation O-10-4403 | Occidental Permian Ltd. only | Monahans (Clear Fork) | Ward | 260 | 4.66M | 5.39M | Jan 1993 – Jul 2026 |
| UL Mill 3427-21 O-10-51872 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 10 | 4.09M | 5.52M | Aug 2018 – Jul 2026 |
| COP O-10-56269 | Boyd & McWilliams Operating, LLC only | Keystone (Wolfcamp) | Winkler | 12 | 3.43M | 3.3M | Oct 2020 – Jul 2026 |
| University BLK 20 O-10-42354 | XTO Energy Inc. only | Two Georges (Bone Spring) | Winkler | 12 | 3.31M | 3.44M | Dec 2011 – Jul 2026 |
| Utl L. J. Beldin 1211-17 O-10-45123 | Jagged Peak Energy LLC only | Phantom (Wolfcamp) | Winkler | 8 | 3.18M | 5.35M | May 2014 – Jul 2026 |
| Half Moon 3019-27 O-10-50880 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 7 | 3.04M | 6.8M | Jul 2018 – Jul 2026 |
| O'Brien, G. W. Etal O-10-26670 | Sundown Energy LP only | Wagon Wheel (Penn) | Ward | 40 | 3.03M | 7.17M | Jan 1993 – Jul 2026 |
| Sealy Smith Foundation O-10-36549 | Occidental Permian Ltd. only | Monahans (Wolf.-Ellen., Cons) | Ward | 41 | 2.81M | 18M | Jan 2001 – Jul 2026 |
| Campbell, Seth O-10-47618 | Hilcorp Energy Company only | Keystone (Consolidated) | Winkler | 78 | 2.81M | 11.6M | Sep 2015 – Jul 2026 |
| UL 20 Stripes 38-47 O-10-51736 | Crescent Energy Operating, LLC only | Phantom (Wolfcamp) | Winkler | 6 | 2.67M | 2.73M | Sep 2018 – Jul 2026 |
| Snowmass 2920-27 O-10-50846 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 3 | 2.39M | 4.21M | Mar 2018 – Jul 2026 |
| CLS Walton O-10-48276 | Team Operating, L.L.C. only | Kermit | Winkler | 97 | 2.38M | 3.13M | Oct 2016 – Jul 2026 |
| Keystone Holt Unit O-10-47085 | Basin Oil & Gas Operating, LLC only | Keystone (Consolidated) | Winkler | 140 | 2.25M | 2.68M | Sep 2015 – Jul 2026 |
| Campbell, Seth O-10-13866 | Apache Corporation only | Keystone (Clear Fork) | Winkler | 67 | 2.16M | 9.47M | Jan 1993 – Aug 2016 |
| University BLK 21 O-10-45128 | XTO Energy Inc. only | Two Georges (Bone Spring) | Winkler | 6 | 2.07M | 2.78M | Jul 2013 – Jul 2026 |
| Utl 4443-21 O-10-49661 | Jagged Peak Energy LLC only | Phantom (Wolfcamp) | Winkler | 4 | 2.05M | 2.24M | Nov 2017 – Jul 2026 |
| Keystone Cattle Co. O-10-3427 | BCP Resources, LLC only | Keystone, South | Winkler | 93 | 1.95M | 8.08M | Jan 1993 – Jul 2026 |
| Sealy Smith Foundation -A- O-10-49490 | Blackbeard Operating, LLC only | Monahans, North (Clearfork) | Winkler | 57 | 1.95M | 8.63M | Mar 2017 – Jul 2026 |
| UL Maroon 0904-21 O-10-51854 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 3 | 1.94M | 2.98M | Nov 2018 – Jul 2026 |
| University B21 5 O-10-47510 | Mewbourne Oil Company only | Phantom (Wolfcamp) | Winkler | 4 | 1.87M | 1.86M | Jan 2016 – Jul 2026 |
| Sealy-Smith Foundation "B" O-10-50028 | Blackbeard Operating, LLC only | Monahans, North (Clearfork) | Winkler | 36 | 1.83M | 8.01M | Apr 2017 – Jul 2026 |
| Paintbrush 27-6-21 O-10-51695 | OXY USA WTP LP only | Phantom (Wolfcamp) | Winkler | 3 | 1.82M | 3.52M | Feb 2019 – Jul 2026 |
| UL Montgomery 1003-21 O-10-50523 | WPX Energy Permian, LLC only | Phantom (Wolfcamp) | Winkler | 6 | 1.79M | 2.22M | Mar 2018 – Jul 2026 |
| RK-Utl 3031B-17 O-10-48527 | Jagged Peak Energy LLC only | Phantom (Wolfcamp) | Winkler | 3 | 1.66M | 2.12M | Dec 2016 – Jul 2026 |
| University 20 TG Unit O-10-38244 | Pdeh LLC only | Two Georges (Bone Spring) | Winkler | 16 | 1.64M | 1.95M | May 2007 – Mar 2023 |
| South Keystone /Ellen/ Unit O-10-22615 | Basin Oil & Gas Operating, LLC only | Keystone (Ellenburger) | Winkler | 38 | 1.61M | 13.6M | Jan 1993 – Jul 2026 |
| Utl 4546A-21 O-10-54097 | Jagged Peak Energy LLC only | Phantom (Wolfcamp) | Winkler | 4 | 1.59M | 2.33M | Sep 2019 – Jul 2026 |
| Sealy Smith Foundation -A- O-10-31515 | Hilcorp Energy Company only | Monahans, North (Clearfork) | Winkler | 30 | 1.54M | 14.6M | Jan 1993 – Jul 2026 |
| University B21 7 O-10-45947 | Mewbourne Oil Company only | Two Georges (Bone Spring) | Winkler | 4 | 1.53M | 1.26M | Nov 2014 – Jul 2026 |
| University B21 8 O-10-48089 | Mewbourne Oil Company only | Phantom (Wolfcamp) | Winkler | 4 | 1.45M | 1.26M | Nov 2016 – Jul 2026 |
| UL 21 Yellowtail O-10-49015 | Apache Corporation only | Phantom (Wolfcamp) | Winkler | 3 | 1.45M | 1.53M | Apr 2017 – Jul 2026 |
| Ally O-10-48672 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 6 | 1.37M | 1.92M | Nov 2016 – Jul 2026 |
| University 20 PW O-10-52243 | Pdeh LLC only | Spraberry (Trend Area) | Winkler | 8 | 1.32M | 1.63M | Jan 2018 – Jul 2026 |
| East Keystone(san a Holt Unit) O-10-36780 | Merit Energy Company only | Keystone (Holt) | Winkler | 81 | 1.29M | 1.81M | Jan 2002 – Dec 2015 |
| Utl 4344-21 O-10-48515 | Jagged Peak Energy LLC only | Phantom (Wolfcamp) | Winkler | 5 | 1.26M | 1.7M | Aug 2016 – Jul 2026 |
| Baird, W. E. O-10-47127 | Basin Oil & Gas Operating, LLC only | Keystone (Consolidated) | Winkler | 81 | 1.23M | 5.3M | Sep 2015 – Jul 2026 |
| Mitchell 28-47 O-10-48885 | Mewbourne Oil Company only | Phantom (Wolfcamp) | Winkler | 4 | 1.19M | 1.4M | May 2017 – Jul 2026 |
| Sealy-Smith Foundation -A- O-10-4409 | Hilcorp Energy Company only | Monahans, N. (Ellenburger) | Winkler | 5 | 1.18M | 874K | Jan 1993 – Jul 2026 |
| Keystone Cattle Company O-10-35757 | BCP Resources, LLC only | Keystone, South (Devonian) | Winkler | 9 | 1.18M | 3.72M | May 1998 – Jul 2026 |
| Walton, J. B. O-10-3375 | Hilcorp Energy Company only | Keystone (Ellenburger) | Winkler | 22 | 1.13M | 24M | Jan 1993 – Jul 2026 |
| Sealy-Smith Foundation -A- O-10-31588 | Hilcorp Energy Company only | Monahans, North (Fusselman) | Winkler | 9 | 1.1M | 2.53M | Jan 1993 – Jul 2026 |
| Brown-Altman -B- O-10-1349 | Hilcorp Energy Company only | Emperor (Holt) | Winkler | 17 | 1.04M | 852K | Jan 1993 – Jul 2026 |
| University B20 2/11 O-10-51737 | Mewbourne Oil Company only | Phantom (Wolfcamp) | Winkler | 2 | 1.04M | 1.13M | Jan 2019 – Jul 2026 |
| Halley, S. M. O-10-2435 | Team Operating, L.L.C. only | Halley | Winkler | 256 | 1M | 4.17M | Jan 1993 – Jul 2026 |
| UL Bighorn a 21-30-19 O-10-47974 | Apache Corporation only | Phantom (Wolfcamp) | Winkler | 2 | 991K | 1.12M | May 2016 – Jul 2026 |