| North Westbrook Unit O-10-20831 | Bce-Mach III LLC only | Westbrook | Mitchell | 1,146 | 26.2M | 1.81M | Jan 1993 – Jul 2026 |
| Westbrook Southeast Unit O-10-20847 | Bce-Mach III LLC only | Westbrook | Mitchell | 632 | 17.5M | 969K | Jan 1993 – Jul 2026 |
| Westbrook Southwest Unit O-10-21120 | Grayrock Energy II, LLC only | Westbrook | Mitchell | 371 | 8.65M | 21 | Jan 1993 – Jul 2026 |
| Westbrook Oil Corp. O-10-4536 | Hilcorp Energy Company only | Nolley (Wolfcamp) | Andrews | 18 | 1.02M | 693K | Jan 1993 – Jul 2026 |
| Westbrook Oil Corp. O-10-20866 | Hilcorp Energy Company only | Nolley (Devonian) | Andrews | 5 | 420K | 153K | Jan 1993 – Jul 2026 |
| Morrison, Earl E O-10-35495 | Diamondback E&P LLC only | Westbrook (Clear Fork, Upper) | Mitchell | 16 | 398K | 46.7K | Sep 1997 – Feb 2020 |
| Westbrook Oil Corp. O-10-20862 | Hilcorp Energy Company only | Nolley (Canyon) | Andrews | 4 | 331K | 159K | Jan 1993 – Jul 2026 |
| Mitchell Fee O-10-11428 | Winn Operating, LLC only | Westbrook | Mitchell | 16 | 312K | 15 | Jan 1993 – Jul 2026 |
| Westbrook 28 O-10-37183 | Burk Royalty Co., Ltd. only | W. A. M. (Wolfcamp) | Sterling | 1 | 164K | 527K | Jun 2003 – Jul 2026 |
| Strain, Minnie O-10-24267 | GNG Operating LLC only | Westbrook, East (Clear Fork) | Mitchell | 8 | 155K | 5.8K | Jan 1993 – Jul 2026 |
| Phelan, Bonita O-10-24946 | M2 Squared Operating, LLC only | Westbrook | Mitchell | 13 | 146K | 21 | Jan 1993 – Jul 2026 |
| Westbrook Unit N O-11-70455 | Gunn Oil Company only | Prothro (Canyon) | Cottle | 1 | 128K | 0 | May 2016 – Jul 2026 |
| Morrison-Gill O-10-35606 | Energen Resources Corporation only | Westbrook (Clear Fork, Upper) | Mitchell | 3 | 113K | 4.43K | Jan 1998 – Apr 2008 |
| Smartt, L. E. A. O-10-27111 | Bce-Mach III LLC only | Westbrook | Mitchell | 7 | 109K | 21 | Jan 1993 – Jul 2026 |
| Morrison -G- O-10-22658 | Grayrock Energy II, LLC only | Westbrook | Mitchell | 12 | 107K | 21 | Jan 1993 – Jul 2026 |
| Brennand -B- O-10-30546 | S.B. Street Operating, Inc. only | Westbrook (Miss) | Mitchell | 1 | 105K | 121K | Jan 1993 – Mar 2010 |
| Shoemaker, Clara -B- O-10-24661 | Swjn Oil Company only | Westbrook, East (Clear Fork) | Mitchell | 5 | 102K | 22 | Jan 1993 – Jul 2026 |
| Pruittfkeel O-10-28032 | Swjn Oil Company only | Westbrook, East (Clear Fork) | Mitchell | 9 | 101K | 22 | Jan 1993 – Jul 2026 |
| Westbrook O-3-12953 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 2 | 100K | 1.42M | Jan 1993 – Jul 2026 |
| Westbrook 22 O-10-52020 | Burk Royalty Co., Ltd. only | Conger (Leonard) | Sterling | 2 | 97K | 189K | Jun 2019 – Jul 2026 |
| Westbrook O-13-9125 | BKM Production only | Mackoy (Strawn 4800) | — | 1 | 94.8K | 21 | Jan 1993 – Jul 2026 |
| Brennand, H. D. -B- O-10-28303 | Bce-Mach III LLC only | Westbrook | Mitchell | 3 | 94.7K | 20 | Jan 1993 – Jul 2026 |
| Westbrook, F. 22 O-10-36221 | Burk Royalty Co., Ltd. only | W. A. M. (Wolfcamp) | Sterling | 3 | 90.8K | 835K | Jan 2000 – Jul 2026 |
| Brennand, H. D. O-10-25072 | Unitex Oil & Gas, L.L.C. only | Westbrook | Mitchell | 2 | 90.2K | 21 | Jan 1993 – Jul 2026 |
| Trulock W. G. O-10-26400 | Winn Operating, LLC only | Westbrook | Mitchell | 4 | 79.7K | 24 | Jan 1993 – Jul 2026 |
| Westbrook 21 O-10-34776 | Burk Royalty Co., Ltd. only | W. A. M. (Wolfcamp) | Sterling | 2 | 77.4K | 274K | Dec 1995 – Jul 2026 |
| McKenney, Wilma O-10-23925 | Royal Oryx OG LLC only | Westbrook, East (Clear Fork) | Mitchell | 11 | 72.9K | 22 | Jan 1993 – Jul 2026 |
| Newby O-10-26851 | Nordstrand Engineering, Inc. only | Westbrook, East (Clear Fork) | Mitchell | 9 | 66.6K | 21 | Jan 1993 – Jul 2026 |
| Womack O-10-27577 | IP Well Service LLC only | Westbrook, East (Clear Fork) | Mitchell | 2 | 61K | 20 | Jan 1993 – Jul 2026 |
| Piercy Heirs O-10-28679 | Unitex Oil & Gas, L.L.C. only | Westbrook, East (Clear Fork) | Mitchell | 1 | 53.1K | 21 | Jan 1993 – Jul 2026 |
| Newby O-10-30337 | Royal Oryx OG LLC only | Westbrook, East (Clear Fork) | Mitchell | 2 | 53K | 41 | Jan 1993 – Jul 2026 |
| Smartt, Mrs. Sam et Al O-10-35711 | Energen Resources Corporation only | Westbrook (Clear Fork, Upper) | Mitchell | 3 | 52.7K | 18K | Apr 1998 – Apr 2008 |
| CVS O-10-27338 | Cedar Bend Oil Company only | Westbrook, East (Clear Fork) | Mitchell | 3 | 51.3K | 21 | Jan 1993 – Jul 2026 |
| Westbrook 22 O-10-34124 | Burk Royalty Co., Ltd. only | Conger (Penn) | Sterling | 6 | 49K | 1.18M | Apr 1994 – Jul 2026 |
| Cole O-10-24550 | GNG Operating LLC only | Westbrook, East (Clear Fork) | Mitchell | 4 | 48.7K | 1.1K | Jan 1993 – Jul 2026 |
| Westbrook, J. C. O-13-14837 | St. Cajetan Oil Company, LLC only | Cooke County Regular | Cooke | 4 | 48.3K | 4.43K | Jan 1993 – Jul 2026 |
| Varner-Piercy O-10-29065 | Unitex Oil & Gas, L.L.C. only | Westbrook, East (Clear Fork) | Mitchell | 2 | 47.4K | 21 | Jan 1993 – Jul 2026 |
| North Westbrook Unit O-10-46972 | Sabinal Energy Operating, LLC only | Westbrook (Clear Fork, Upper) | Mitchell | 1 | 46.3K | 3.67K | Mar 2009 – Nov 2024 |
| Brennand, Est of R. S. Jr. O-10-25059 | Unitex Oil & Gas, L.L.C. only | Westbrook, East (Clear Fork) | Mitchell | 3 | 43.9K | 21 | Jan 1993 – Jul 2026 |
| Westbrook, J. C. 'A' O-13-2096 | St. Cajetan Oil Company, LLC only | Cooke County Regular | — | 6 | 43.6K | 502 | Jan 1993 – Jul 2026 |
| Morrison O-10-14158 | Swjn Oil Company only | Westbrook | Mitchell | 4 | 43.3K | 23 | Jan 1993 – Jul 2026 |
| Bryant O-10-34944 | Cedar Bend Oil Company only | Westbrook | — | 2 | 40K | 208 | Jun 1996 – Jul 2026 |
| Westbrook N O-11-70350 | Gunn Oil Company only | Prothro (Canyon) | Cottle | 2 | 39.1K | 0 | Jun 2015 – Jul 2026 |
| Morrison-Gill O-10-24879 | Diamondback E&P LLC only | Westbrook (Clear Fork, Upper) | Mitchell | 3 | 38.7K | 21 | Jan 1993 – May 2019 |
| Morwest O-10-38351 | Grayrock Energy II, LLC only | Westbrook | Mitchell | 2 | 38.3K | 0 | Nov 2007 – Jul 2026 |
| Westbrook, D. J. O-13-2081 | Felderhoff Production Company only | Cooke County Regular | — | 2 | 38.2K | 21 | Jan 1993 – Jul 2026 |
| Westbrook 29 O-10-33571 | Burk Royalty Co., Ltd. only | William Fuller (Lo. Clearfork) | Sterling | 2 | 35.9K | 68.9K | Jan 1993 – Jul 2026 |
| Sun-Georgia Tech O-10-7867 | Rasmussen, Tom only | Westbrook | — | 3 | 34.8K | 28 | Jan 1993 – Jul 2026 |
| Raiter O-10-36005 | Nordstrand Engineering, Inc. only | Westbrook, East (Clear Fork) | Mitchell | 1 | 34.8K | 0 | Apr 1999 – Jul 2026 |
| Westbrook Southeast Unit O-10-44987 | Bce-Mach III LLC only | Westbrook (Clear Fork, Upper) | Mitchell | 8 | 33.4K | 2K | Aug 2012 – Jul 2026 |