| Preston Spraberry Unit O-10-18551 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 391 | 17.8M | 54.3M | Jan 1993 – Jul 2026 |
| Preston 5 O-10-47241 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 29 | 6.93M | 43.6M | Nov 2015 – Jul 2026 |
| Preston B O-10-47855 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 13 | 3.84M | 23.2M | Dec 2015 – Jul 2026 |
| Preston A O-10-46162 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 14 | 2.95M | 16.6M | Oct 2014 – Jul 2026 |
| Preston a Unit O-1-16436 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Gonzales | 7 | 1.84M | 3.91M | Nov 2012 – Jul 2026 |
| J.M. Preston Unit O-1-16991 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Gonzales | 6 | 1.52M | 2.57M | Mar 2013 – Jul 2026 |
| Preston E13A O-10-51399 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 2 | 714K | 2.89M | Nov 2018 – Jul 2026 |
| Preston E13C O-10-51253 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 2 | 677K | 2.92M | Nov 2018 – Jul 2026 |
| Preston 9G O-10-57581 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 650K | 1.65M | Dec 2021 – Jul 2026 |
| Hudgins, John O-13-29593 | Tatanka Operating, LLC only | Preston (Davis, Lower) | Grayson | 4 | 633K | 4.7M | Jul 1998 – Jul 2026 |
| Preston-Freeman 15C O-10-58497 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 546K | 1.37M | Sep 2022 – Jul 2026 |
| Preston E13B O-10-51241 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 2 | 536K | 2.59M | Nov 2018 – Jul 2026 |
| Preston-Shackelford 15E O-10-60382 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 525K | 1.13M | Aug 2023 – Jul 2026 |
| Preston 9C O-10-57640 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 515K | 1.82M | Feb 2022 – Jul 2026 |
| Preston 9H O-10-57471 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 502K | 1.45M | Dec 2021 – Jul 2026 |
| Barnhart (Ef)-J.M. Preston SA5 O-1-21225 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Gonzales | 1 | 481K | 314K | Oct 2023 – Jul 2026 |
| Preston 18L O-10-50317 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 481K | 1.63M | Feb 2018 – Jul 2026 |
| Preston 9L O-10-57550 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 2 | 473K | 1.95M | Feb 2022 – Jul 2026 |
| Preston 9B O-10-57499 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 473K | 1.4M | Feb 2022 – Jul 2026 |
| Preston-Shackelford 15B O-10-60450 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 466K | 1.04M | Aug 2023 – Jul 2026 |
| Preston E17C O-10-56350 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 465K | 1.25M | Sep 2021 – Jul 2026 |
| Preston-Freeman 15E O-10-58476 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 463K | 1.25M | Sep 2022 – Jul 2026 |
| Preston W17B O-10-56093 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 459K | 1.84M | Apr 2021 – Jul 2026 |
| Preston-Shackelford 15A O-10-60511 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 456K | 1.05M | Sep 2023 – Jul 2026 |
| Preston 9A O-10-57599 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 455K | 1.06M | Jun 2022 – Jul 2026 |
| Preston-Freeman 15G O-10-58286 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 434K | 1.12M | Jul 2022 – Jul 2026 |
| Preston 9I O-10-57538 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 431K | 1.64M | Feb 2022 – Jul 2026 |
| Preston-Shackelford 15J O-10-60512 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 429K | 1.06M | Sep 2023 – Jul 2026 |
| Preston E17B O-10-56304 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 426K | 1.63M | Sep 2021 – Jul 2026 |
| Preston W17C O-10-56172 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 423K | 1.34M | Aug 2021 – Jul 2026 |
| Preston-Freeman 15I O-10-58463 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 421K | 1.05M | Sep 2022 – Jul 2026 |
| Preston 18H O-10-50180 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 417K | 2.31M | Feb 2018 – Jul 2026 |
| Preston E17A O-10-56196 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 416K | 1.35M | Sep 2021 – Jul 2026 |
| Preston-Shackelford 15K O-10-60633 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 416K | 888K | Sep 2023 – Jul 2026 |
| Preston 18A O-10-48917 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 409K | 2.25M | Jun 2017 – Jul 2026 |
| Preston 18F O-10-48823 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 407K | 1.94M | Dec 2016 – Jul 2026 |
| Preston E13I O-10-52476 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 402K | 1.88M | May 2019 – Jul 2026 |
| Preston 18J O-10-50182 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 394K | 1.72M | Feb 2018 – Jul 2026 |
| Preston E17F O-10-56173 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 389K | 1.74M | Sep 2021 – Jul 2026 |
| Preston 18I O-10-50181 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 388K | 2.23M | Feb 2018 – Jul 2026 |
| Preston E13G O-10-52227 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 387K | 2.14M | May 2019 – Jul 2026 |
| Preston S31M O-10-56076 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 381K | 1.45M | Apr 2021 – Jul 2026 |
| Barnhart (Ef)-J.M. Preston SA2 O-2-12713 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Gonzales | 1 | 379K | 268K | Oct 2023 – Jul 2026 |
| Preston E13H O-10-52272 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 374K | 1.69M | May 2019 – Jul 2026 |
| Preston-Shackelford 15G O-10-60578 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 370K | 754K | Aug 2023 – Jul 2026 |
| Preston 18K O-10-50215 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 369K | 2.23M | Feb 2018 – Jul 2026 |
| Preston W13I O-10-52182 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 362K | 1.74M | May 2019 – Jul 2026 |
| Preston W17A O-10-56016 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Midland | 1 | 359K | 1.79M | Mar 2021 – Jul 2026 |
| Preston O-11-68735 | Occidental Permian Ltd. only | Anton-Irish (Wolfcamp) | Hale | 2 | 356K | 94.3K | Jan 2005 – Jul 2026 |
| Preston-Freeman 15A O-10-58424 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 356K | 685K | Aug 2022 – Jul 2026 |