| El Regalo Buckhorn O-1-15998 | Murphy Expl. & Prod. Co. - USA only | Briscoe Ranch (Eagleford) | Dimmit | 23 | 4.03M | 7.65M | Oct 2012 – Apr 2026 |
| Buck (AK) O-10-53795 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 8 | 2.59M | 4.84M | Nov 2019 – Apr 2026 |
| Walters, Mittie O-10-32425 | Basa Resources, Inc. only | Buckwheat (Siluro-Devonian) | Howard | 5 | 1.44M | 68.3K | Jan 1993 – Apr 2026 |
| Reedbuck State Unit 25 O-10-50802 | VTX Energy Operating, LLC only | Wolfbone (Trend Area) | Reeves | 4 | 1.43M | 2.59M | Apr 2018 – Apr 2026 |
| Springer Wilson 192 O-11-68469 | Buck Wheat Resources, L.P. only | Christopher (Lower Tannehill) | King | 15 | 1.42M | 0 | Jul 2002 – Mar 2026 |
| Georgia Buck 01 O-2-10709 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 10 | 1.22M | 1.28M | Nov 2013 – Feb 2026 |
| Brutus Buckeye 28-40 E O-10-57271 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 3 | 920K | 3.63M | Mar 2022 – Apr 2026 |
| Brutus Buckeye 28-40 C O-10-57326 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 3 | 836K | 3.6M | Apr 2022 – Apr 2026 |
| Brutus Buckeye 28-40 G O-10-57279 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 2 | 799K | 2.05M | Mar 2022 – Apr 2026 |
| Blackbuck Unit O-1-15724 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Atascosa | 4 | 795K | 823K | Jan 2012 – Apr 2026 |
| Buckskin State 1003 4U G-10-287109 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 703K | 3.4M | Jul 2019 – Apr 2026 |
| Brutus Buckeye 28-40 A O-10-57267 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 2 | 694K | 1.86M | Apr 2022 – Apr 2026 |
| Buckingham O-14-8580 | Mustang Fuel Corporation only | Mills Ranch (Granite Wash Cons.) | Wheeler | 2 | 666K | 2.54M | Sep 2011 – Apr 2026 |
| Buckskin State 1003 2U G-10-287018 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 609K | 3.59M | Jul 2019 – Apr 2026 |
| Big Bucks 29-10 O-10-47596 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Loving | 1 | 560K | 840K | Jun 2016 – Apr 2026 |
| Buckingham O-14-8118 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 545K | 3.6M | Mar 2010 – Apr 2026 |
| Buck Unit O-2-11823 | Warwick-Artemis, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 2 | 517K | 945K | Aug 2019 – Apr 2026 |
| Jordyn O-9-14962 | COG Operating LLC only | Buck Trap (Wolfcamp) | Upton | 1 | 505K | 2.26M | Feb 2000 – Aug 2010 |
| Buckeye 55-1-28 Unit G-10-284415 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Loving | 1 | 486K | 2.15M | May 2018 – Apr 2026 |
| Frost O-11-67956 | Hunt Cimarron Ltd. Partnership only | Buckshot (4950) | Cochran | 67 | 481K | 407K | Aug 1998 – Apr 2026 |
| Bucky 711 A O-11-70811 | Ring Energy, Inc. only | Platang (San Andres) | Yoakum | 4 | 452K | 850K | Oct 2018 – Apr 2026 |
| Buckskin State 1003 7U G-10-290875 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 450K | 2.4M | May 2022 – Apr 2026 |
| Buckskin State 1003 1U G-10-287202 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 434K | 5.95M | Jul 2019 – Apr 2026 |
| Reedbuck State Unit 25A61 O-10-56573 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 408K | 476K | Nov 2021 – Apr 2026 |
| Bushbuck 12D22 O-10-62776 | VTX Energy Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 396K | 669K | Feb 2024 – Apr 2026 |
| Reedbuck State Unit 25A62 O-10-56548 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 393K | 598K | Oct 2021 – Apr 2026 |
| Buckner BB 17B O-10-46549 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Glasscock | 2 | 374K | 3.95M | Jan 2015 – Apr 2026 |
| Buckin Chute 33-61 O-10-42563 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 3 | 365K | 785K | Dec 2011 – Feb 2024 |
| Buckskin State 1003 3U G-10-287042 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 356K | 5.87M | Jul 2019 – Apr 2026 |
| Brutus Buckeye 28-40 D O-10-57270 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 1 | 356K | 1.84M | Apr 2022 – Apr 2026 |
| Bushbuck 12C Unit 63 O-10-62325 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 345K | 439K | Feb 2024 – Apr 2026 |
| Buckner BB 17D O-10-46335 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 334K | 1.66M | Jan 2015 – Apr 2026 |
| Bushbuck 12C Unit 64 O-10-62326 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 330K | 358K | Feb 2024 – Apr 2026 |
| Bushbuck Unit 12W61 O-10-60309 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 329K | 293K | Aug 2023 – Apr 2026 |
| S. Buckman Falsone HCX1 O-3-27632 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Brazos | 1 | 326K | 192K | Aug 2019 – Mar 2026 |
| Buckskin State 1003 5U G-10-290839 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 321K | 1.98M | Jun 2022 – Apr 2026 |
| Bushbuck Unit 12E24 O-10-58798 | VTX Energy Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 310K | 487K | Nov 2022 – Apr 2026 |
| Buckingham Unit O-1-17626 | Gulftex Energy, LLC only | Eagleville (Eagle Ford-1) | Gonzales | 1 | 291K | 163K | Apr 2014 – Mar 2026 |
| Bushbuck Unit 12E14 O-10-58790 | VTX Energy Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 289K | 400K | Nov 2022 – Apr 2026 |
| UL 20 Bucktail E O-10-62051 | Pdeh LLC only | Phantom (Wolfcamp) | Winkler | 1 | 288K | 357K | Dec 2024 – Apr 2026 |
| UL 20 Bucktail F O-10-62158 | Pdeh LLC only | Phantom (Wolfcamp) | Winkler | 1 | 285K | 341K | Dec 2024 – Apr 2026 |
| Alexia O-9-14954 | COG Operating LLC only | Buck Trap, North (Wolfcamp) | Upton | 3 | 274K | 2.6M | Jan 2000 – Feb 2004 |
| S. Buckman Falsone HCX2 O-3-27661 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Brazos | 1 | 267K | 157K | Aug 2019 – Mar 2026 |
| Buckskin State 1003 6U G-10-290754 | PDC Permian, Inc. only | Phantom (Wolfcamp) | Reeves | 1 | 264K | 1.85M | Jul 2022 – Apr 2026 |
| Buckner BB 17A O-10-47463 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 261K | 1.84M | Dec 2015 – Apr 2026 |
| Bushbuck Unit 12W11 O-10-60316 | VTX Energy Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 260K | 374K | Aug 2023 – Apr 2026 |
| J. H. Buckman E Unit O-3-26249 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Burleson | 1 | 258K | 81.5K | Jul 2013 – Mar 2026 |
| Brutus Buckeye 28-40 F O-10-57275 | Birch Operations, Inc. only | Spraberry (Trend Area) | Howard | 2 | 254K | 740K | Mar 2022 – Apr 2026 |
| Bushbuck Unit 12E34 O-10-58799 | VTX Energy Operating, LLC only | Sandbar (Bone Spring) | Reeves | 1 | 251K | 359K | Nov 2022 – Apr 2026 |
| Masten, F. O. Estate O-11-64683 | Southwest Royalties, Inc. only | Buckshot (Fusselman) | Cochran | 1 | 249K | 54 | Jan 1993 – Feb 2019 |