| UL Mason West Unit O-10-49200 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 11 | 2.59M | 2.47M | Jul 2017 – Jul 2026 |
| UL Mason East Unit O-10-48688 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 4 | 2.15M | 3.06M | Mar 2017 – Jul 2026 |
| UL Mason Unit O-10-45925 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 4 | 1.37M | 1.91M | May 2014 – Jul 2026 |
| North Mason /Delaware Sand/ Unit O-10-18649 | Extex Operating Company only | Mason, N. (Delaware Sand) | Loving | 59 | 561K | 704K | Jan 1993 – Jul 2026 |
| Martin Mason O-1-15356 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 5 | 489K | 315K | Dec 2010 – Jul 2026 |
| Christy-Thomason 15E O-9-21350 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 446K | 1.21M | Jun 2021 – Jul 2026 |
| Thomason A O-3-26026 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 3 | 422K | 1.01M | Aug 2012 – Jul 2026 |
| Christy-Thomason 15H O-9-21375 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 401K | 1.22M | Jun 2021 – Jul 2026 |
| UL Mason East A O-10-52054 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 395K | 372K | Feb 2019 – Jul 2026 |
| UL Mason East B O-10-52101 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 395K | 386K | Feb 2019 – Jul 2026 |
| Christy-Thomason 15G O-9-21379 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 374K | 984K | Jun 2021 – Jul 2026 |
| Christy-Thomason 15C O-9-21205 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 366K | 2.05M | Nov 2020 – Jul 2026 |
| Mason, T. O. O-7-8152 | Basa Resources, Inc. only | East Texas | Rusk | 30 | 364K | 9.29K | Jan 1993 – Jul 2026 |
| Martin Mason Unit Q O-1-17802 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 363K | 101K | Jan 2014 – Jul 2026 |
| Christy-Thomason 15F O-9-21370 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 358K | 819K | Jun 2021 – Jul 2026 |
| UL Mason East C O-10-52055 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 1 | 352K | 502K | Feb 2019 – Jul 2026 |
| Mason-Nelson O-13-32969 | Trio Consulting & Management,llc only | Piarist, SW (Miss) | Hardeman | 1 | 343K | 0 | Aug 2014 – Jul 2026 |
| Martin Mason Unit K O-1-16434 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 317K | 231K | Aug 2012 – Jul 2026 |
| Christy-Thomason 15A O-9-21203 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 308K | 1.99M | Nov 2020 – Jul 2026 |
| Martin Mason HC5 O-1-20207 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 298K | 267K | Feb 2020 – Jul 2026 |
| Masonic 72 WRD O-10-45099 | Pdeh LLC only | Phantom (Wolfcamp) | Ward | 3 | 295K | 891K | Dec 2013 – Jul 2026 |
| Martin-Mason Ranch Unit A O-1-15510 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 292K | 144K | Dec 2010 – Jul 2026 |
| Martin Mason Unit E O-1-15425 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 287K | 130K | Mar 2011 – Jul 2026 |
| Martin Mason Unit P O-1-17488 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 272K | 107K | Feb 2014 – Jul 2026 |
| Martin Mason Unit U O-1-16466 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 271K | 154K | Nov 2012 – Jul 2026 |
| Martin Mason HC6 O-1-20210 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 269K | 167K | Feb 2020 – Jul 2026 |
| Martin Mason HC1 O-1-20198 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 269K | 142K | Feb 2020 – Jul 2026 |
| Martin Mason HC2 O-1-20204 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 268K | 190K | Feb 2020 – Jul 2026 |
| Mason, R. G. O-7-7343 | Basa Resources, Inc. only | East Texas | Rusk | 22 | 267K | 21 | Jan 1993 – Jul 2026 |
| Martin Mason B O-1-15437 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 3 | 259K | 136K | Dec 2010 – Jul 2026 |
| Martin Mason HC9 O-1-20203 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 255K | 190K | Feb 2020 – Jul 2026 |
| Stone-Mason 935 O-14-8693 | Mewbourne Oil Company only | Allen-Parker (Marmaton) | Ochiltree | 3 | 250K | 1.18M | Aug 2012 – Jul 2026 |
| Thomason B O-3-26027 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 1 | 240K | 368K | Sep 2012 – Jul 2026 |
| Martin Mason HC7 O-1-20201 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 235K | 157K | Jan 2020 – Jul 2026 |
| Martin Mason HC8 O-1-20202 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 233K | 191K | Feb 2020 – Jul 2026 |
| Martin Mason Unit N O-1-15426 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 2 | 230K | 76.2K | Apr 2011 – Jul 2026 |
| Martin Mason HC3 O-1-20205 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 228K | 206K | Jan 2020 – Jul 2026 |
| Martin Mason HC4 O-1-20206 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 224K | 197K | Feb 2020 – Jul 2026 |
| Thomason "D" O-10-40221 | Diamondback E&P LLC only | Spraberry (Trend Area) | Glasscock | 8 | 199K | 986K | Jun 2010 – Jul 2026 |
| Mason 1938 Unit O-10-55786 | Walsh & Watts, Inc. only | Garden City, S. (Wolfcamp) | Fisher | 1 | 183K | 462K | May 2021 – Jul 2026 |
| Christy-Thomason 15D O-9-21329 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 183K | 657K | Dec 2020 – Jul 2026 |
| Mason, Glen "A" O-11-61224 | Burk Royalty Co., Ltd. only | Leeper (Glorieta) | Hockley | 5 | 174K | 58K | Jan 1993 – Jul 2026 |
| Masonic 72 WRD Unit O-10-45839 | Pdeh LLC only | Phantom (Wolfcamp) | Ward | 1 | 173K | 477K | Jun 2014 – Jul 2026 |
| Christy-Thomason 15B O-9-21204 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 139K | 652K | Jan 2021 – Jul 2026 |
| Thomason, University O-9-6738 | L & M Operating, Inc. only | Weger, North | Reagan | 8 | 119K | 250K | Jan 1993 – Jul 2026 |
| Byron Mason 1085 O-14-9481 | Mewbourne Oil Company only | Allen-Parker (Marmaton) | Lipscomb | 1 | 112K | 245K | Jul 2016 – Jul 2026 |
| Shook-Mason O-11-66183 | Finley Resources, Inc. only | Brahaney, Northwest (Devonian) | Yoakum | 2 | 96.4K | 13.3K | Jan 1993 – Jul 2026 |
| Thomason "9" O-9-16366 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 3 | 95.7K | 231K | Sep 2007 – Jul 2026 |
| Mason O-11-17673 | Burk Royalty Co., Ltd. only | Leeper (Glorieta) | Hockley | 7 | 95.6K | 63.4K | Jan 1993 – Jul 2026 |
| Martin Mason Unit D O-1-15420 | Ineos USA Oil & Gas LLC only | Eagleville (Eagle Ford-1) | McMullen | 1 | 94.7K | 22.6K | Jan 2011 – Jul 2026 |