| Williams, Maude, Etal -A- O-2-2533 | Hilcorp Energy Company only | Lake Pasture (H-440 Sand) | Refugio | 176 | 11.1M | 179M | Jan 1993 – Jul 2026 |
| COP O-10-56269 | Boyd & McWilliams Operating, LLC only | Keystone (Wolfcamp) | Winkler | 12 | 3.43M | 3.3M | Oct 2020 – Jul 2026 |
| Williams, J. E. O-14-655 | Large Operating LLC only | Panhandle Gray County Field | Gray | 73 | 2.82M | 1.69M | Jan 1993 – Jul 2026 |
| River Ranch -a-/Williams State U O-2-9301 | T-C Oil Company, LLC only | Anaqua (3100) | Refugio | 12 | 1.99M | 509K | Sep 2008 – Jul 2026 |
| Jess B. Williams Unit A O-2-10261 | Verdun Oil & Gas LLC only | Eagleville (Eagle Ford-2) | Karnes | 4 | 1.04M | 2.78M | Jul 2012 – Jul 2026 |
| Williams, J. R. O-7-8057 | Basa Resources, Inc. only | East Texas | Gregg | 24 | 953K | 439K | Jan 1993 – Jul 2026 |
| Williams O-14-1409 | Exxcel Production Company only | Panhandle Wheeler County Field | Wheeler | 12 | 903K | 371K | Jan 1993 – Jul 2026 |
| Williams, S.P. O-14-586 | Large Operating LLC only | Panhandle Gray County Field | Gray | 16 | 782K | 285K | Jan 1993 – Jul 2026 |
| Williams Unit B 24-13 O-10-46464 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 4 | 735K | 1.13M | Sep 2014 – Jul 2026 |
| Williams 21 C O-10-52008 | Diamondback E&P LLC only | Spraberry (Trend Area) | Howard | 3 | 665K | 3.22M | Feb 2018 – Jul 2026 |
| Williams 21 B O-10-51305 | Diamondback E&P LLC only | Spraberry (Trend Area) | Howard | 3 | 645K | 2.84M | Feb 2018 – Jul 2026 |
| Clyde Williams Unit O-3-25875 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Robertson | 4 | 588K | 138K | Feb 2012 – Jul 2026 |
| Aline Williams Unit A O-1-15831 | Crescent Energy Operating, LLC only | Briscoe Ranch (Eagleford) | Frio | 3 | 536K | 605K | Nov 2011 – Jul 2026 |
| Williams-Nail 5D O-10-61971 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 528K | 619K | Sep 2024 – Jul 2026 |
| Williams-Eiland 3J O-10-60867 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 519K | 683K | Jan 2024 – Jul 2026 |
| Williams Estate O-3-21994 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Fayette | 2 | 517K | 1.37M | Mar 1993 – Sep 2024 |
| McWilliams Heirs A O-1-15060 | Trailblazer Energy Resources,llc only | Doering Ranch (Georgetown) | Frio | 8 | 484K | 3.4M | May 2009 – Jul 2026 |
| Williams-Hazelwood 46L O-10-59765 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 481K | 665K | Jul 2023 – Jul 2026 |
| Dudley 10 O-10-59381 | Boyd & McWilliams Operating, LLC only | Keystone (Wolfcamp) | Winkler | 2 | 480K | 207K | Jun 2022 – Jul 2026 |
| Williams, Maude, Etal -A- O-2-820 | Hilcorp Energy Company only | Lake Pasture (FS-527) | Refugio | 15 | 466K | 1.27M | Jan 1993 – Jul 2026 |
| Williams, Maude, et al -A- O-2-2878 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 10 | 441K | 369K | Jan 1993 – Jul 2026 |
| Williams-Eiland 3I O-10-61255 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 437K | 788K | Feb 2024 – Jul 2026 |
| Williams, Peeler "A" O-10-23709 | Diamondback E&P LLC only | RK (Devonian) | Martin | 3 | 419K | 1.1K | Jan 1993 – Jul 2026 |
| Williams-Eiland 3H O-10-60830 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 413K | 626K | Dec 2023 – Jul 2026 |
| Anderson O-3-21569 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk-3) | Brazos | 3 | 409K | 1.67M | Jan 1993 – Aug 2014 |
| Williams Unit O-10-49682 | Strawn Petroleum Operating, LLC only | Garden City, S. (Wolfcamp) | Scurry | 1 | 399K | 1.58M | Nov 2016 – Jul 2026 |
| Williams-Eiland 3K O-10-61016 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 398K | 693K | Mar 2024 – Jul 2026 |
| Williams Unit a 24-13 O-10-52037 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 3 | 390K | 731K | Jan 2019 – Jul 2026 |
| Williams-Nail 5H O-10-62072 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 382K | 502K | Aug 2024 – Jul 2026 |
| Williams-Hazelwood 46A O-10-59496 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 380K | 980K | Feb 2023 – Jul 2026 |
| Williams, Maude, Etal -A- O-2-2527 | Hilcorp Energy Company only | Lake Pasture (FS-523) | Refugio | 12 | 379K | 658K | Jan 1993 – Jul 2026 |
| Williams, N. M. O-11-189 | Shinnery Oil Company, Inc. only | Alex | Terry | 8 | 368K | 192K | Jan 1993 – Jul 2026 |
| Edwards O-10-12657 | Williams Oil Company only | Crawar (Devonian, North) | Ward | 7 | 364K | 2.62M | Jan 1993 – Jul 2026 |
| Williams 21 A O-10-51746 | Diamondback E&P LLC only | Spraberry (Trend Area) | Howard | 1 | 363K | 1.26M | Feb 2018 – Jul 2026 |
| Williams, Robert & James O-6-11843 | Rose City Resources, LLC only | Navarro Crossing (Woodbine) | Leon | 3 | 347K | 5.94K | Jan 1993 – Jul 2026 |
| South Williams 10-51 O-10-48639 | Noble Energy Inc only | Hoefs T-K (Wolfcamp) | Reeves | 1 | 343K | 563K | Feb 2017 – Jul 2026 |
| Williams-Hazelwood 46K O-10-59547 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 342K | 726K | Jul 2023 – Jul 2026 |
| Williams-Hazelwood 46J O-10-59486 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 337K | 537K | Jan 2023 – Jul 2026 |
| Williams-Nail 5A O-10-61967 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 336K | 488K | Aug 2024 – Jul 2026 |
| Williams-Hazelwood 46C O-10-59760 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 335K | 474K | Jul 2023 – Jul 2026 |
| Williams 17DD O-10-47231 | Ovintiv USA Inc. only | Spraberry (Trend Area) | Howard | 1 | 335K | 397K | Jan 2015 – Jul 2026 |
| Williams, MM O-3-22523 | Goldking Minerals Mgmt, L.L.C. only | Alvin, North (7900) | Brazoria | 2 | 334K | 378K | Sep 1994 – Jul 2026 |
| Williams, Mack O-13-2288 | Seitz, J. R. & Adam, Ltd. only | Dove | Cooke | 6 | 333K | 21 | Jan 1993 – Jul 2026 |
| Williams, E. W. Jr. "A" O-11-62587 | Aviator Energy, LLC only | WTG (Glorieta) | Garza | 10 | 331K | 50.8K | Jan 1993 – Jul 2026 |
| McKnight, M. B. O-10-33498 | Williams Oil Company only | Armer (6350) | Crane | 17 | 327K | 1.19M | Jan 1993 – Jul 2026 |
| Williams-Eiland 3F O-10-60899 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 327K | 549K | Feb 2024 – Jul 2026 |
| Turk-Williams Unit O-1-15938 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Gonzales | 2 | 326K | 458K | May 2012 – Jul 2026 |
| Williams-Hazelwood 46B O-10-59822 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 325K | 379K | Jul 2023 – Jul 2026 |
| Williams-Hazelwood 46F O-10-59520 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 325K | 1.18M | Feb 2023 – Jul 2026 |
| Williams, Maude, Etal, -A- O-2-2589 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 9 | 323K | 573K | Jan 1993 – Jul 2026 |