| UL Mason West Unit O-10-49200 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 11 | 3.01M | 2.91M | Jul 2017 – Aug 2026 |
| UL Mason East Unit O-10-48688 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 4 | 2.17M | 3.08M | Mar 2017 – Aug 2026 |
| UL Mason Unit O-10-45925 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 4 | 1.38M | 1.93M | May 2014 – Aug 2026 |
| North Mason /Delaware Sand/ Unit O-10-18649 | R2Q Operating LLC only | Mason, N. (Delaware Sand) | Loving | 59 | 572K | 704K | by Jan 1993 – Aug 2026 |
| Martin Mason O-1-15356 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 5 | 490K | 317K | Jan 2011 – Aug 2026 |
| Christy-Thomason 15E O-9-21350 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 459K | 1.23M | Jun 2021 – Aug 2026 |
| Thomason A O-3-26026 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 3 | 423K | 1.02M | Sep 2012 – Jul 2026 |
| Christy-Thomason 15H O-9-21375 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 403K | 1.3M | Jun 2021 – Aug 2026 |
| UL Mason East B O-10-52101 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 401K | 399K | Feb 2019 – Aug 2026 |
| UL Mason East A O-10-52054 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 400K | 378K | Feb 2019 – Aug 2026 |
| Christy-Thomason 15G O-9-21379 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 384K | 1M | Jun 2021 – Aug 2026 |
| Christy-Thomason 15C O-9-21205 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 371K | 2.21M | Jun 2021 – Aug 2026 |
| Christy-Thomason 15F O-9-21370 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 367K | 854K | Jun 2021 – Aug 2026 |
| Martin Mason Unit Q O-1-17802 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 366K | 102K | Jan 2014 – Aug 2026 |
| Mason, T. O. O-7-8152 | Basa Resources, Inc. only | East Texas | Rusk | 30 | 366K | 9.29K | by Jan 1993 – Aug 2026 |
| UL Mason East C O-10-52055 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 354K | 505K | Feb 2019 – Aug 2026 |
| Mason-Nelson O-13-32969 | Trio Consulting & Management,llc only | Piarist, SW (Miss) | Hardeman | 1 | 347K | 0 | Aug 2014 – Aug 2026 |
| Martin Mason Unit K O-1-16434 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 319K | 234K | Oct 2012 – Aug 2026 |
| Christy-Thomason 15A O-9-21203 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 313K | 2.16M | Jun 2021 – Aug 2026 |
| Martin Mason HC5 O-1-20207 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 302K | 275K | Aug 2020 – Aug 2026 |
| Masonic 72 WRD O-10-45099 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Ward | 3 | 296K | 899K | Dec 2014 – Aug 2026 |
| Martin-Mason Ranch Unit A O-1-15510 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 293K | 146K | Jan 2011 – Aug 2026 |
| Martin Mason Unit E O-1-15425 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 288K | 131K | Sep 2011 – Aug 2026 |
| Martin Mason HC1 O-1-20198 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 277K | 147K | Aug 2020 – Aug 2026 |
| Martin Mason HC6 O-1-20210 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 274K | 175K | Aug 2020 – Aug 2026 |
| Martin Mason Unit P O-1-17488 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 274K | 107K | Feb 2014 – Aug 2026 |
| Martin Mason HC2 O-1-20204 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 273K | 194K | Aug 2020 – Aug 2026 |
| Martin Mason Unit U O-1-16466 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 272K | 156K | Dec 2012 – Aug 2026 |
| Mason, R. G. O-7-7343 | Basa Resources, Inc. only | East Texas | Rusk | 22 | 268K | 21 | by Jan 1993 – Aug 2026 |
| Martin Mason B O-1-15437 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 3 | 259K | 136K | Feb 2011 – Aug 2026 |
| Martin Mason HC9 O-1-20203 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 259K | 204K | Aug 2020 – Aug 2026 |
| Stone-Mason 935 O-14-8693 | Mewbourne Oil Company only | Allen-Parker (Marmaton) | Ochiltree | 3 | 251K | 1.19M | Aug 2012 – Aug 2026 |
| Thomason B O-3-26027 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 1 | 241K | 370K | Sep 2012 – Jul 2026 |
| Martin Mason HC7 O-1-20201 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 239K | 165K | Aug 2020 – Aug 2026 |
| Martin Mason HC8 O-1-20202 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 236K | 200K | Aug 2020 – Aug 2026 |
| Martin Mason HC3 O-1-20205 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 232K | 213K | Aug 2020 – Aug 2026 |
| Martin Mason Unit N O-1-15426 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 230K | 76.2K | Mar 2012 – Aug 2026 |
| Martin Mason HC4 O-1-20206 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 229K | 207K | Aug 2020 – Aug 2026 |
| Thomason "D" O-10-40221 | Diamondback E&P LLC only | Spraberry (Trend Area) | Glasscock | 8 | 200K | 994K | Jun 2010 – Aug 2026 |
| Mason 1938 Unit O-10-55786 | Walsh & Watts, Inc. only | Garden City, S. (Wolfcamp) | Fisher | 1 | 188K | 491K | May 2021 – Aug 2026 |
| Christy-Thomason 15D O-9-21329 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 187K | 687K | Jun 2021 – Aug 2026 |
| Masonic 72 WRD Unit O-10-45839 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Ward | 1 | 175K | 492K | Mar 2015 – Aug 2026 |
| Mason, Glen "A" O-11-61224 | Burk Royalty Co., Ltd. only | Leeper (Glorieta) | Hockley | 5 | 175K | 58K | by Jan 1993 – Aug 2026 |
| Christy-Thomason 15B O-9-21204 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 140K | 667K | Jun 2021 – Aug 2026 |
| Thomason, University O-9-6738 | L & M Operating, Inc. only | Weger, North | Reagan | 8 | 119K | 251K | by Jan 1993 – Aug 2026 |
| Byron Mason 1085 O-14-9481 | Mewbourne Oil Company only | Allen-Parker (Marmaton) | Lipscomb | 1 | 113K | 248K | Jul 2016 – Aug 2026 |
| Shook-Mason O-11-66183 | Finley Resources, Inc. only | Brahaney, Northwest (Devonian) | Yoakum | 2 | 96.4K | 13.3K | by Jan 1993 – Nov 2003 |
| Thomason "9" O-9-16366 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 3 | 95.7K | 231K | Sep 2007 – Sep 2021 |
| Mason O-11-17673 | Burk Royalty Co., Ltd. only | Leeper (Glorieta) | Hockley | 7 | 95.6K | 63.4K | by Jan 1993 – Nov 2019 |
| Martin Mason Unit D O-1-15420 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 95K | 22.6K | Feb 2011 – Aug 2026 |