| Roche O-2-8604 | Finaly Resources LLC | Cactus (Frio Massive) | 4 | 330K | 355K | Jun 2000 – Aug 2026 |
| Heard, Fannie V.W. Mrs. O-2-7813 | Hilcorp Energy Company | Tom Oconnor (5200, East) | 17 | 325K | 705K | by Jan 1993 – Jul 2026 |
| Williams, Maude, Etal, -A- O-2-2589 | Hilcorp Energy Company | Tom Oconnor (5500 Sand) | 9 | 323K | 573K | by Jan 1993 – Apr 2025 |
| Oconnor, Dennis, et al -N- O-2-3598 | T-C Oil Company, LLC | Huff (372) | 7 | 316K | 483K | by Jan 1993 – Aug 2026 |
| Lambert, M. F. O-2-1549 | Hilcorp Energy Company | Tom Oconnor | 26 | 316K | 830K | by Jan 1993 – Aug 2026 |
| Williams, Maude, et al -A- O-2-2906 | Hilcorp Energy Company | Tom Oconnor (5450 Sand) | 15 | 314K | 643K | by Jan 1993 – Mar 2026 |
| Heard, F. V. W. O-2-3994 | Greta Operating Company LLC | Greta (4400) | 3 | 313K | 162K | by Jan 1993 – Aug 2026 |
| Schirmer "C-120" O-2-8216 | Bent Wing Energy, LLC | Bonnie View (4700) | 1 | 287K | 59.4K | Oct 1996 – Aug 2026 |
| Lambert, M. F. O-2-1527 | Hilcorp Energy Company | Tom Oconnor | 17 | 278K | 330K | by Jan 1993 – May 2019 |
| O'Connor, Thomas -C- O-2-9135 | Hilcorp Energy Company | Tom Oconnor (5200, East) | 13 | 277K | 63.2K | Apr 2007 – Aug 2026 |
| Lambert, M.F. O-2-8906 | Hilcorp Energy Company | Tom Oconnor (5200, East) | 18 | 277K | 419K | Aug 2004 – Aug 2026 |
| Bauer, Mary Claire, et Vir O-2-2583 | Hilcorp Energy Company | Tom Oconnor (5500 Sand) | 13 | 274K | 419K | by Jan 1993 – Dec 2023 |
| Obrien, J. J., -B- O-2-3960 | Greta Operating Company LLC | Greta (4400) | 4 | 273K | 40.8K | by Jan 1993 – Nov 2024 |
| O'Connor, Thomas "A" O-2-3662 | Hilcorp Energy Company | Tom Oconnor (5400 Sand) | 20 | 273K | 1.01M | by Jan 1993 – Feb 2023 |
| Rooke. B.D. O-2-8019 | Rising Star Energy Partners II, | La Rosa (Consolidated, Oil) | 41 | 273K | 508K | Jan 1995 – Jul 2026 |
| Heard, F. V. W. O-2-8810 | Dorchester Operating Company LLC | Greta (F-3 West) | 2 | 262K | 207K | Jul 2003 – Jul 2016 |
| Williams, Maude et al "A" O-2-8842 | Hilcorp Energy Company | Lake Pasture (FT-759) | 3 | 255K | 432K | Mar 2004 – Sep 2018 |
| Willow Creek -B- O-2-9482 | T-C Oil Company, LLC | Willow Creek (8000) | 5 | 252K | 338K | Sep 2010 – Nov 2018 |
| Lambert, M. F. O-2-2581 | Hilcorp Energy Company | Tom Oconnor (5500 Sand) | 6 | 241K | 367K | by Jan 1993 – May 2019 |
| Oconnor, Thomas -A- O-2-4927 | Hilcorp Energy Company | Tom Oconnor (5450 Sand) | 12 | 238K | 685K | by Jan 1993 – Sep 2023 |
| Braman -D- O-2-11520 | T-C Oil Company, LLC | Braman (8200) | 1 | 208K | 295K | Apr 2018 – Aug 2026 |
| Clay Pasture -B- State Unit O-2-9332 | T-C Oil Company, LLC | Anaqua (3100) | 3 | 207K | 81K | Jul 2009 – Aug 2026 |
| O'Connor, Dennis et al -N- O-2-8738 | T-C Oil Company, LLC | Huff (3000, FB-W) | 1 | 207K | 135K | Sep 2002 – Aug 2026 |
| Heard, Claude E., Etal O-2-2584 | Hilcorp Energy Company | Tom Oconnor (5500 Sand) | 7 | 196K | 433K | by Jan 1993 – Mar 2011 |
| Clarkson, Edith O-2-1391 | Kovar Operating, LLC | Refugio Old | 2 | 196K | 175K | by Jan 1993 – Feb 2015 |
| Lambert , M. F. O-2-6256 | Hilcorp Energy Company | Tom O'Connor (4150) | 10 | 193K | 157K | by Jan 1993 – Jul 2019 |
| O'Connor, Mary Ellen O-2-7933 | O'Connor Energy Management, LLC | Mary Ellen Oconnor (FS-75) | 16 | 192K | 500K | Oct 1993 – Nov 2015 |
| Maude Williams et al 'A' O-2-11339 | Hilcorp Energy Company | Lake Pasture (FS-503) | 2 | 187K | 409K | Mar 2017 – Jul 2026 |
| O'Conner, Thomas -C- O-2-6234 | Hilcorp Energy Company | Tom O'Connor (4150) | 10 | 186K | 393K | by Jan 1993 – May 2004 |
| Lambert, M. F. O-2-8556 | Hilcorp Energy Company | Tom Oconnor (7940) | 2 | 186K | 479K | Aug 2000 – Nov 2005 |
| Buck O-2-6495 | Christopher Oil & Gas Inc | Bonnie View (4700) | 1 | 182K | 31.5K | by Jan 1993 – Feb 2006 |
| Scanio, Miguelita G-2-233636 | Digital Operating Company LLC | Refugio-Fox (6750) | 1 | 180K | 552K | Mar 2007 – Feb 2022 |
| T-C Oil Co. -O'Connor O-2-7326 | T-C Oil Company, LLC | Lake Pasture (FT-570) | 1 | 177K | 745K | by Jan 1993 – Jan 2016 |
| Obrien, J. M. O-2-4921 | South Texas Operating Company | Greta, Deep (5660) | 1 | 174K | 137K | by Jan 1993 – Aug 2026 |
| O'Conner, Mary Ellen O-2-6698 | Dolphin Petroleum, LP | Mary Ellen Oconnor (FQ-30) | 3 | 174K | 391K | by Jan 1993 – Jul 2016 |
| Tract 72 O-2-7837 | Kebo Oil & Gas, Inc. | Siene Bean (5770) | 1 | 169K | 163K | by Jan 1993 – Aug 2026 |
| Roche, K. D. -A- O-2-3466 | Kovar Operating, LLC | Roche (-A-) | 8 | 166K | 252K | by Jan 1993 – Aug 2016 |
| Lambert, M. F. O-2-4958 | Hilcorp Energy Company | Tom Oconnor (5450 Sand) | 7 | 166K | 421K | by Jan 1993 – May 2025 |
| Heard, Claude E., et Al O-2-1539 | Hilcorp Energy Company | Tom Oconnor | 12 | 163K | 369K | by Jan 1993 – Jan 2023 |
| Williams, Maude, Etal -A- O-2-1548 | Hilcorp Energy Company | Tom Oconnor | 25 | 160K | 372K | by Jan 1993 – Oct 2016 |
| Schirmer, Henry O-2-8871 | Bent Wing Energy, LLC | Bonnie View (5400) | 2 | 159K | 139K | Jul 2004 – Aug 2026 |
| O'Connor, Dennis et al -A- O-2-8133 | T-C Oil Company, LLC | Melon Ranch (5800) | 1 | 157K | 201K | Dec 1995 – Sep 2021 |
| Lambert, M. F., -A- O-2-4004 | Hilcorp Energy Company | Greta (3500) | 1 | 156K | 374K | by Jan 1993 – Oct 2016 |
| Oconner, M. E. O-2-6867 | T-C Oil Company, LLC | Refugio Old (5500) | 1 | 155K | 204K | by Jan 1993 – Jan 2022 |
| Miguelita Scanio O-2-9317 | Digital Operating Company LLC | Tom Oconnor (7200) | 1 | 154K | 182K | Mar 2009 – Dec 2025 |
| Reilly, Annie, et Vir O-2-2592 | Hilcorp Energy Company | Tom Oconnor (4500 Greta Mass.) | 5 | 153K | 144K | by Jan 1993 – Oct 2023 |
| Bauer, Mary Claire et Vir O-2-8808 | Hilcorp Energy Company | Tom Oconnor (5900 Sand) | 5 | 152K | 230K | Jul 2003 – Jan 2023 |
| Oconnor, Thomas, -A- O-2-2627 | Hilcorp Energy Company | Tom Oconnor (5500 Sand) | 9 | 151K | 150K | by Jan 1993 – Jan 2022 |
| Oconnor, Thos. O-2-3990 | Greta Operating Company LLC | Greta (4400) | 6 | 148K | 52.1K | Feb 1998 – Aug 2026 |
| Welder "C" O-2-8852 | Hilcorp Energy Company | Phil Power (5000) | 1 | 147K | 218K | May 2002 – Jan 2015 |