| Flat Top Ranch PC O-8-32215 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Haskell | 13 | 1.27M | 1.62M | Dec 2017 – Dec 2025 |
| Concho Bluff Queen Unit O-10-19684 | Flat Top Operating, LLC only | Concho Bluff (Queen) | Crane | 36 | 701K | 14.6K | Jan 1993 – Jul 2026 |
| Drum "467" O-11-68513 | Flat Top Operating, LLC only | Galey (Wolfcamp) | Borden | 2 | 568K | 76.1K | Dec 2002 – Jul 2026 |
| Jones O-10-28766 | Flat Top Operating, LLC only | Brazos (San Andres) | Midland | 6 | 563K | 1.12K | Jan 1993 – Jul 2026 |
| John O-11-61386 | Flat Top Operating, LLC only | Tri-Rue (Reef) | Scurry | 4 | 483K | 411K | Jan 1993 – Jul 2026 |
| Giesecke O-11-66013 | Flat Top Operating, LLC only | Tripp (Devonian) | Gaines | 1 | 463K | 14.8K | Jan 1993 – Jul 2026 |
| Risley O-8-32285 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Haskell | 6 | 438K | 688K | Aug 2018 – Dec 2025 |
| Connie O-11-66656 | Flat Top Operating, LLC only | Tri-Rue (Reef) | Scurry | 3 | 399K | 241K | Jan 1993 – Jul 2026 |
| Mesa O-11-67144 | Flat Top Operating, LLC only | Gill (Penn. Reef 6900) | Scurry | 1 | 394K | 410K | Sep 1993 – Jul 2026 |
| Kinsel O-1-12317 | Flat Top Operating, LLC only | Muil | Atascosa | 2 | 393K | 498K | Jan 1993 – Jul 2026 |
| Schwertner O-8-32442 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 5 | 301K | 669K | Mar 2020 – Dec 2025 |
| Flat Top Ranch PCN O-8-32532 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Haskell | 9 | 254K | 231K | Sep 2021 – Jul 2026 |
| Lydia O-10-27712 | Flat Top Operating, LLC only | Brazos (San Andres) | Midland | 2 | 251K | 19 | Jan 1993 – Jul 2026 |
| McGuire O-11-66150 | Flat Top Operating, LLC only | Tripp (Devonian) | Gaines | 1 | 249K | 11K | Jan 1993 – Jul 2026 |
| Eugene O-10-27966 | Flat Top Operating, LLC only | Brazos (San Andres) | Midland | 2 | 249K | 19 | Jan 1993 – Jul 2026 |
| Ped Wichita O-10-39673 | Flat Top Operating, LLC only | Hudson | Andrews | 9 | 238K | 11.9K | Jul 2009 – Jul 2026 |
| Ica University 37 O-10-44128 | Flat Top Operating, LLC only | Triple-N (Penn., Upper) | Andrews | 3 | 197K | 222K | Apr 2013 – Jul 2026 |
| Brazos Unit O-11-67488 | Flat Top Operating, LLC only | Ruwco-Glasscock (Canyon) | Scurry | 1 | 194K | 118K | Dec 1995 – Jul 2026 |
| Wolfe Estate O-10-23436 | Flat Top Operating, LLC only | Block a-28 (Wichita-Albany) | Gaines | 1 | 173K | 188K | Jan 1993 – Jul 2026 |
| Risley 'B' O-8-32398 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 5 | 171K | 139K | Nov 2019 – Dec 2025 |
| Risley 'A' O-8-32404 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Haskell | 3 | 164K | 142K | Dec 2019 – Dec 2025 |
| Risley French O-8-32475 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 6 | 164K | 353K | Dec 2020 – Dec 2025 |
| Parker Ranchland 22 O-10-44362 | Flat Top Operating, LLC only | Monahans Draw (Canyon 8388) | Ector | 4 | 147K | 430K | Oct 2012 – Jul 2026 |
| Parker Ranchland 21 O-10-44727 | Flat Top Operating, LLC only | Monahans Draw (Canyon 8388) | Ector | 4 | 146K | 296K | Nov 2013 – Jul 2026 |
| Dugger "A" O-11-65866 | Flat Top Operating, LLC only | Deroen (Mississippian) | Dawson | 1 | 144K | 47.7K | Jan 1993 – Jul 2026 |
| Morton O-8-32395 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 2 | 132K | 0 | Aug 2019 – Jul 2026 |
| Risley 'C' O-8-32491 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 5 | 121K | 28.5K | Apr 2021 – Dec 2025 |
| Billie Magness O-8-31836 | Flat Top Operating, LLC only | Hat Top Mountain (Goen Lime) | Nolan | 2 | 107K | 0 | Jan 2015 – Jul 2026 |
| Vacancy Strip -7- O-10-29087 | Flat Top Operating, LLC only | Means, N. (Queen Sand) | Andrews | 2 | 102K | 20 | Jan 1993 – Jul 2026 |
| Jones "466" O-11-68633 | Flat Top Operating, LLC only | Galey (Wolfcamp) | Borden | 1 | 100K | 0 | Dec 2003 – Jul 2026 |
| University-Fred "A" O-10-34933 | Flat Top Operating, LLC only | Twofreds, E. (Delaware) | Loving | 1 | 100K | 322 | May 1996 – Jul 2026 |
| University-Fred O-10-34508 | Flat Top Operating, LLC only | Twofreds, E. (Delaware) | Loving | 1 | 97.4K | 50.2K | Jun 1995 – Jul 2026 |
| Thigpen, J. N. O-10-25458 | Flat Top Operating, LLC only | Block a-2 (Strawn) | Pecos | 1 | 96.6K | 51.3K | Jan 1993 – Jul 2026 |
| Flat Top Strawn Unit O-8-32821 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 60 | 92.7K | 77.8K | Jun 2025 – Jul 2026 |
| General Crude Fee O-10-20754 | Flat Top Operating, LLC only | Block a-28 (Wichita-Albany) | Andrews | 2 | 88.8K | 19.6K | Jan 1993 – Jul 2026 |
| B & W O-10-40999 | Flat Top Operating, LLC only | Block 12 (Devonian) | Andrews | 1 | 82.5K | 153K | Oct 2010 – Jul 2026 |
| Thomas Ranch O-8-14563 | Flat Top Operating, LLC only | Thomas Ranch (Ellenburger) | Nolan | 2 | 81.5K | 42.5K | Jan 1993 – Jul 2026 |
| Brownfield O-11-66208 | Flat Top Operating, LLC only | Ownby | Yoakum | 1 | 81.4K | 51.3K | Jan 1993 – Jul 2026 |
| Beulah Magness O-8-31439 | Flat Top Operating, LLC only | Watts (Gardner Sand) | Nolan | 5 | 79.3K | 326K | Dec 2012 – Jul 2026 |
| Dugger O-11-65690 | Flat Top Operating, LLC only | Deroen (Mississippian) | Dawson | 1 | 78.4K | 26.4K | Jan 1993 – Jul 2026 |
| Zant 38 O-10-45810 | Flat Top Operating, LLC only | Blalock (Strawn) | Glasscock | 1 | 77.5K | 279K | Apr 2013 – Jul 2026 |
| Tufbow O-11-65771 | Flat Top Operating, LLC only | Tufbow (Strawn) | Garza | 4 | 76.5K | 83.3K | Jan 1993 – Jul 2026 |
| Bird, F. A. "A" O-9-11121 | Flat Top Operating, LLC only | Spraberry (Trend Area) | Reagan | 2 | 72K | 425K | Jan 1993 – Oct 2024 |
| Jonhaire O-11-63283 | Flat Top Operating, LLC only | R.O.J. (San Andres) | Lynn | 2 | 62.1K | 21.4K | Jan 1993 – Jul 2026 |
| Edwards O-10-46498 | Flat Top Operating, LLC only | Double -H- (Grayburg) | Ector | 3 | 61K | 0 | Apr 2015 – Jul 2026 |
| McKnight, M. B. O-10-10795 | Flat Top Operating, LLC only | Sand Hills (McKnight) | Crane | 3 | 57.5K | 131 | Jan 1993 – Jul 2026 |
| Swenson Ranch O-8-12735 | Culebra Oil & Gas, LLC only | Flat Top 166 (Cisco 3800) | Stonewall | 1 | 57.2K | 167 | Jan 1993 – Jul 2026 |
| Sigmund Stovall O-8-30351 | S.B. Street Operating, Inc. only | Flat Top, South (Strawn) | Stonewall | 2 | 55.3K | 63.4K | May 2009 – Jul 2026 |
| Lucky 22 O-8-30192 | TKP Petroleum, Inc. only | Flat Top 161 (Strawn) | Stonewall | 1 | 53K | 55.3K | Aug 2008 – Jul 2026 |
| Manske O-8-32565 | NBX Energy, LLC only | Flat Top JC (Strawn, Upper) | Jones | 2 | 52.3K | 59.2K | Jan 2022 – Dec 2025 |