| Thomas O-10-50222 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 16 | 3.46M | 8.06M | Oct 2017 – Jul 2026 |
| Price-Thomas O-11-63563 | Aviator Energy, LLC only | Forbes (Glorieta) | Crosby | 64 | 3.11M | 282K | Jan 1993 – Jul 2026 |
| O'Connor, Thomas -C- O-2-2876 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 59 | 2.99M | 2.17M | Jan 1993 – Jul 2026 |
| Thomas Unit O-2-10040 | EOG Resources, Inc. only | Eagleville (Eagle Ford-2) | Karnes | 11 | 2.37M | 4.37M | May 2012 – Jul 2026 |
| Oconnor, Thomas, -C- O-2-2587 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 51 | 2.22M | 2.1M | Jan 1993 – Jul 2026 |
| Thomas Crozier Unit O-1-16053 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Gonzales | 9 | 1.53M | 2.8M | Jun 2012 – Jul 2026 |
| Dix, Thomas C O-1-2778 | Texas Petroleum Investment Co. only | Darst Creek (Edwards) | Guadalupe | 46 | 874K | 1.79K | Jan 1993 – Jul 2026 |
| Oconnor, Thomas -A- O-2-1542 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 36 | 650K | 756K | Jan 1993 – Jul 2026 |
| Oconnor, Thomas, -C- O-2-2566 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 18 | 646K | 278K | Jan 1993 – Jul 2026 |
| Thomas, E., Mrs. et AL O-3-10454 | Hilcorp Energy Company only | Fannett | Jefferson | 3 | 642K | 1.13M | Jan 1993 – Jul 2026 |
| Thomas, C. N. O-11-5632 | Crossroads Operating, LLC only | Sharon Ridge (Clear Fork) | Scurry | 10 | 566K | 30.2K | Jan 1993 – Jul 2026 |
| O'Connor, Thomas "A" O-2-7579 | Hilcorp Energy Company only | Tom O'Connor (5770 U, South) | Refugio | 28 | 538K | 627K | Jan 1993 – Jul 2026 |
| Thomas, E., et AL O-3-20896 | Hilcorp Energy Company only | Fannett | Jefferson | 27 | 447K | 795K | Jan 1993 – Jul 2026 |
| Christy-Thomason 15E O-9-21350 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 446K | 1.21M | Jun 2021 – Jul 2026 |
| Greer Thomas 3-44 E O-9-21099 | Diamondback E&P LLC only | Spraberry (Trend Area) | Reagan | 1 | 423K | 2.56M | Jun 2020 – Jul 2026 |
| Thomason A O-3-26026 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 3 | 422K | 1.01M | Aug 2012 – Jul 2026 |
| Christy-Thomason 15H O-9-21375 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 401K | 1.22M | Jun 2021 – Jul 2026 |
| Christy-Thomason 15G O-9-21379 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 374K | 984K | Jun 2021 – Jul 2026 |
| Christy-Thomason 15C O-9-21205 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 366K | 2.05M | Nov 2020 – Jul 2026 |
| Christy-Thomason 15F O-9-21370 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 358K | 819K | Jun 2021 – Jul 2026 |
| Dix, Thomas 'A' O-1-2791 | Texas Petroleum Investment Co. only | Darst Creek (Edwards) | Guadalupe | 17 | 351K | 219 | Jan 1993 – Jul 2026 |
| Thomas, A. E. O-10-32734 | Hilcorp Energy Company only | TXL (Tubb) | Ector | 4 | 316K | 582K | Jan 1993 – Jul 2026 |
| Christy-Thomason 15A O-9-21203 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 308K | 1.99M | Nov 2020 – Jul 2026 |
| Greer Thomas 3-44 G O-9-21108 | Diamondback E&P LLC only | Spraberry (Trend Area) | Reagan | 1 | 306K | 2.72M | Jun 2020 – Jul 2026 |
| Christy-Thomas 15E O-9-22402 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 305K | 1.03M | Oct 2023 – Jul 2026 |
| Thomas Unit O-11-68520 | Schalk Oil Company, Inc. only | Soldier Mound (Stockwether) | Dickens | 1 | 298K | 28 | Jan 2003 – Jul 2026 |
| O'Connor, Thomas "A" O-2-3662 | Hilcorp Energy Company only | Tom Oconnor (5400 Sand) | Refugio | 20 | 273K | 1.01M | Jan 1993 – Jul 2026 |
| O'Connor, Thomas -C- O-2-9135 | Hilcorp Energy Company only | Tom Oconnor (5200, East) | Refugio | 12 | 272K | 61.7K | Apr 2007 – Jul 2026 |
| Thomas O-9-16577 | Apache Corporation only | Spraberry (Trend Area) | Upton | 5 | 253K | 700K | Mar 2008 – Jul 2026 |
| Christy-Thomas 15F O-9-22411 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 246K | 743K | Nov 2023 – Jul 2026 |
| Thomason B O-3-26027 | Wildfire Energy Operating LLC only | Madisonville, W. (Woodbine -A-) | Madison | 1 | 240K | 368K | Sep 2012 – Jul 2026 |
| Oconnor, Thomas -A- O-2-4927 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 12 | 238K | 685K | Jan 1993 – Jul 2026 |
| Christy-Thomas 15D O-9-22334 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 235K | 596K | Aug 2023 – Jul 2026 |
| Thomas & Whittington O-1-3615 | B. J. P. Operating only | Dunlap | Caldwell | 28 | 229K | 261K | Jan 1993 – Jul 2026 |
| Greer Thomas 44-3 B O-9-21962 | Diamondback E&P LLC only | Spraberry (Trend Area) | Reagan | 2 | 228K | 3.44M | Jan 2023 – Jul 2026 |
| Christy-Thomas 15A O-9-22375 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 225K | 799K | Sep 2023 – Jul 2026 |
| Thomas "A" O-11-61868 | Midland Energy, Inc. only | Ackerly (Dean Sd., SE.) | Borden | 3 | 214K | 480K | Jan 1993 – Jul 2026 |
| Christy-Thomas 15C O-9-22384 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 211K | 612K | Oct 2023 – Jul 2026 |
| Christy-Thomas 15B O-9-22358 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 211K | 567K | Aug 2023 – Jul 2026 |
| Thomas 3 O-10-39744 | New Height Energy, LLC only | Spraberry (Trend Area) | Howard | 4 | 211K | 1.11M | Sep 2009 – Jul 2026 |
| Thomas, M. O-7-8267 | Basa Resources, Inc. only | East Texas | — | 17 | 209K | 169K | Jan 1993 – Jul 2026 |
| Thomas, C. A. O-11-65236 | Extex Operating Company only | Wasson 72 | Yoakum | 2 | 203K | 128K | Jan 1993 – Jul 2026 |
| Thomason "D" O-10-40221 | Diamondback E&P LLC only | Spraberry (Trend Area) | Glasscock | 8 | 199K | 986K | Jun 2010 – Jul 2026 |
| Thomas J Rusk A O-1-21821 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 192K | 136K | Aug 2025 – Jul 2026 |
| Thomas, Helen O-11-66330 | Shenandoah Petroleum Corporation only | Two Scotts (Glorieta) | Garza | 2 | 186K | 73.1K | Jan 1993 – Jul 2026 |
| O'Conner, Thomas -C- O-2-6234 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 10 | 186K | 393K | Jan 1993 – Sep 2004 |
| Christy-Thomason 15D O-9-21329 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Reagan | 1 | 183K | 657K | Dec 2020 – Jul 2026 |
| Thomas J Rusk C O-1-21822 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 181K | 132K | Aug 2025 – Jul 2026 |
| Thomas O-11-69968 | Roff Operating Company, LLC only | Ackerly, North Spraberry | Dawson | 2 | 174K | 0 | Oct 2012 – Jul 2026 |
| Thomas J Rusk B O-1-21825 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 174K | 109K | Aug 2025 – Jul 2026 |