| Willis-Berman NE33A O-10-56039 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 3 | 1.34M | 3.83M | Feb 2021 – Jul 2026 |
| Willis-Berman NE33JJ O-10-56044 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 4 | 1.17M | 2.31M | Mar 2021 – Jul 2026 |
| Willis Unit O-2-10776 | EOG Resources, Inc. only | Eagleville (Eagle Ford-2) | Gonzales | 10 | 1.12M | 3.56M | Mar 2014 – Jul 2026 |
| Willis-Berman NE33F O-10-56178 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 2 | 748K | 1.79M | Apr 2021 – Jul 2026 |
| Donovan-Willis W32H O-10-61925 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 481K | 1.01M | Apr 2024 – Jul 2026 |
| Willis-Berman NW33B O-10-57797 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 480K | 869K | Apr 2022 – Jul 2026 |
| Donovan-Willis E32R O-10-61939 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 459K | 930K | Apr 2024 – Jul 2026 |
| Donovan-Willis E32A O-10-62257 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 443K | 746K | Jun 2024 – Jul 2026 |
| Donovan-Willis W32F O-10-61935 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 438K | 935K | Apr 2024 – Jul 2026 |
| Donovan-Willis E32H O-10-62270 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 422K | 952K | Jun 2024 – Jul 2026 |
| Willis "44" O-10-37065 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 8 | 421K | 1.96M | Feb 2003 – Jul 2026 |
| Willis-Berman NW33F O-10-57725 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 420K | 1.05M | Mar 2022 – Jul 2026 |
| Donovan-Willis W32E O-10-61746 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 409K | 994K | Mar 2024 – Jul 2026 |
| Donovan-Willis W32G O-10-61691 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 400K | 797K | Mar 2024 – Jul 2026 |
| Willis-Berman NW33A O-10-57628 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 394K | 983K | Mar 2022 – Jul 2026 |
| Donovan-Willis W32A O-10-62057 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 364K | 707K | May 2024 – Jul 2026 |
| Willis-Berman NW33DD O-10-57689 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 353K | 1.25M | Mar 2022 – Jul 2026 |
| Willis-Berman NE33D O-10-56265 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 346K | 983K | Apr 2021 – Jul 2026 |
| Willis-Berman NW33E O-10-57638 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 342K | 999K | Mar 2022 – Jul 2026 |
| Willis-Berman NE33KK O-10-56177 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 336K | 783K | Jul 2021 – Jul 2026 |
| Willis-Berman NW33H O-10-59201 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 333K | 487K | Apr 2023 – Jul 2026 |
| Donovan-Willis E32D O-10-61936 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 323K | 721K | Apr 2024 – Jul 2026 |
| Willis-Berman NW33K O-10-59206 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 315K | 597K | Apr 2023 – Jul 2026 |
| Willis-Berman NE33H O-10-59396 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 314K | 482K | Apr 2023 – Jul 2026 |
| Willis-Berman NW33CC O-10-57844 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 309K | 1.02M | May 2022 – Jul 2026 |
| Donovan-Willis E32E O-10-62177 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 308K | 404K | May 2024 – Jul 2026 |
| Donovan-Willis E32Q O-10-61889 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 293K | 507K | Apr 2024 – Jul 2026 |
| Willis-Berman NE33K O-10-59423 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 291K | 440K | Apr 2023 – Jul 2026 |
| Donovan-Willis E32C O-10-62298 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 279K | 369K | May 2024 – Jul 2026 |
| Willis C O-3-27395 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Burleson | 1 | 274K | 154K | Dec 2017 – Jul 2026 |
| Willis 40 O-10-48054 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Midland | 3 | 267K | 1.21M | May 2016 – Jul 2026 |
| Donovan-Willis E32J O-10-62296 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 255K | 820K | Jun 2024 – Jul 2026 |
| Donovan-Willis W32K O-10-62095 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 250K | 796K | May 2024 – Jul 2026 |
| Donovan-Willis W32P O-10-62174 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 249K | 627K | May 2024 – Jul 2026 |
| Willis D O-3-27383 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Burleson | 1 | 249K | 183K | Dec 2017 – Jul 2026 |
| Willis-Berman NW33D O-10-58015 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 240K | 868K | May 2022 – Jul 2026 |
| Willis 44-41 B O-10-61468 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 1 | 235K | 462K | Apr 2024 – Jul 2026 |
| Willis-Berman NE33GG O-10-56103 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 232K | 828K | Jul 2021 – Jul 2026 |
| Willis-Berman NW33C O-10-57816 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 227K | 672K | Apr 2022 – Jul 2026 |
| Donovan-Willis W32O O-10-62335 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 222K | 481K | Jun 2024 – Jul 2026 |
| Donovan-Willis W32B O-10-61869 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 216K | 505K | Apr 2024 – Jul 2026 |
| Willis-Berman NW33BB O-10-57641 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 211K | 833K | Mar 2022 – Jul 2026 |
| Donovan-Willis E32T O-10-62171 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 211K | 557K | May 2024 – Jul 2026 |
| Donovan-Willis E32K O-10-62297 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 210K | 462K | May 2024 – Jul 2026 |
| Willis 44-41 D O-10-61461 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 1 | 208K | 472K | Apr 2024 – Jul 2026 |
| Donovan-Willis E32S O-10-62261 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 202K | 478K | Jun 2024 – Jul 2026 |
| Willis A O-3-27405 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Burleson | 1 | 201K | 142K | Feb 2018 – Jul 2026 |
| Willis 44-41 F O-10-61469 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 1 | 198K | 484K | Mar 2024 – Jul 2026 |
| Donovan-Willis W32L O-10-62207 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Midland | 1 | 197K | 343K | Jun 2024 – Jul 2026 |
| Wooley, Willis O-7-7641 | Linder, John Operating Co., LLC only | East Texas | Rusk | 11 | 197K | 160K | Jan 1993 – Jul 2026 |