| Boyt, E. W. O-3-7471 | Gaither Petroleum Corporation only | Hankamer (Miocene Sand) | Liberty | 138 | 3.68M | 1.47M | Jan 1993 – Jul 2026 |
| Harrison Interests, Ltd. "A" O-3-7474 | DJH Oil & Gas LLC only | Hankamer (Miocene Sand) | Liberty | 35 | 695K | 49.9K | Jan 1993 – Jul 2026 |
| Evans, Abbie M. "C" O-3-25691 | Gaither Petroleum Corporation only | Hankamer (Frio 2) | Liberty | 2 | 483K | 452K | Mar 2010 – Jul 2026 |
| Earl Hankamer O-9-19029 | Civitas Permian Operating, LLC only | Lin (Wolfcamp) | Reagan | 1 | 364K | 1.47M | Mar 2015 – Jul 2026 |
| Hankamer O-3-22034 | S & S Operating Company, Inc. only | Stowell, South (Smith -A-) | Jefferson | 1 | 216K | 35.4K | Feb 1993 – Jul 2026 |
| Boyt, E. W. O-3-1864 | Gaither Petroleum Corporation only | Hankamer | Liberty | 6 | 195K | 45K | Jan 1993 – Jul 2026 |
| Hankamer O-3-10633 | S & S Operating Company, Inc. only | Stowell, South (Smith -B-) | — | 1 | 168K | 135K | Jan 1993 – Jul 2026 |
| Hankamer, E. C. O-3-20460 | Puls Operating Company only | Stowell (Intermediate U-2) | Chambers | 2 | 159K | 112K | Jan 1993 – Jul 2026 |
| Hankamer-Tram O-3-26892 | Well-Co Solutions, LLC only | Sabine Tram (Wilcox 2) | Newton | 2 | 144K | 344K | Mar 2014 – Jul 2026 |
| Hankamer Foundation O-3-27663 | Forza Operating, LLC only | Sabine Tram, E (8000, E) | Newton | 1 | 127K | 153K | Oct 2019 – Jun 2025 |
| Wilcox, G.C. O-3-20359 | 84 Energy LLC only | Hankamer, SE. (Seg a Frio) | Chambers | 1 | 119K | 38.8K | Jan 1993 – Jul 2026 |
| Hankamer O-3-24603 | Petro-Guard Production,l.l.c. only | Hartburg (Hackberry 1ST) | Newton | 1 | 115K | 69.7K | Sep 2004 – Nov 2016 |
| Hankamer Bobcat O-3-25564 | Prime Operating Company only | Camptown (6720 Sand) | Newton | 1 | 111K | 122K | Aug 2010 – Jul 2026 |
| Peveto-Kemp O-3-2273 | Hankamer, Curtis Corporation,the only | Hull | — | 1 | 104K | 6.9K | Jan 1993 – Jul 2026 |
| Hankamer, E. C. O-3-10766 | Puls Operating Company only | Stowell, N. (Sullivan) | Chambers | 3 | 95K | 83.3K | Jan 1993 – Jul 2026 |
| Hankamer,i. J., Etal Oil Unit #1 O-3-1882 | Home Petroleum Corp. only | Hankamer, South | Chambers | 2 | 92.8K | 357K | Jan 1993 – Jul 2026 |
| Conner-Taub O-3-23539 | Gaither Petroleum Corporation only | Hankamer | Liberty | 3 | 84.2K | 10.6K | Jul 1998 – Jul 2026 |
| Hayes-Albritton Est. -A- O-3-7973 | New Horizon Resources LLC only | Hankamer, SE. (Seg a Frio) | Chambers | 2 | 84K | 26.6K | Jan 1993 – Sep 2023 |
| Harris, Mattie B. O-3-20912 | Western Energy Group, LLC only | Hankamer, SE. (Seg a Frio) | Liberty | 1 | 80.8K | 15.5K | Jan 1993 – Jul 2026 |
| Hankamer, I. J. et UX O-3-20806 | Home Petroleum Corp. only | Hankamer, South | — | 1 | 78.9K | 370K | Jan 1993 – Jul 2026 |
| Hankamer, Bernice Oil Unit O-3-1878 | Home Petroleum Corp. only | Hankamer, South | Chambers | 2 | 77.7K | 25.6K | Jan 1993 – Jul 2026 |
| Hankamer-Jaguar O-3-25433 | Prime Operating Company only | Camptown (6700 Hackberry) | Newton | 1 | 74.8K | 83.1K | Oct 2009 – Jul 2026 |
| Hankamer "D" O-3-23628 | Prime Operating Company only | Camptown (7100 Hackberry) | Newton | 1 | 65.6K | 56.2K | Jan 1999 – Mar 2020 |
| Hankamer, I. J., Etal -A- O-3-1880 | Home Petroleum Corp. only | Hankamer, South | — | 1 | 64.9K | 13.3K | Jan 1993 – Jul 2026 |
| Martin Etal O-10-21195 | Hankamer, Curtis Corporation,the only | Vincent, S. (Strawn) | — | 1 | 61.5K | 590K | Jan 1993 – Jul 2026 |
| Weaver O-3-26925 | Gaither Petroleum Corporation only | Hankamer | Chambers | 1 | 58.7K | 56.8K | May 2015 – Jul 2026 |
| Hankamer, E. C. O-3-10641 | Gcows Operating LLC only | Stowell (Miocene 6250) | Chambers | 2 | 58.4K | 22.9K | Jan 1993 – Jul 2026 |
| Hankamer O-3-26492 | Firstrike Energy Corporation only | Sabine Tram, E (8000, E) | Newton | 1 | 57.7K | 153K | Feb 2014 – Oct 2017 |
| Harris, Mattie B. O-3-20649 | Western Energy Group, LLC only | Hankamer | Liberty | 1 | 55.5K | 18.3K | Jan 1993 – Jul 2026 |
| Hankamer, E. C. O-3-23571 | Puls Operating Company only | Stowell (Miocene 6645) | Chambers | 1 | 51.5K | 17.7K | Sep 1998 – Sep 2020 |
| Hankamer, I J et Al O-3-1879 | Home Petroleum Corp. only | Hankamer, South | — | 1 | 50.9K | 7.45K | Jan 1993 – Jul 2026 |
| Evans, Abbie, M. et al -C- O-3-7472 | Gaither Petroleum Corporation only | Hankamer (Miocene Sand) | Liberty | 6 | 49K | 14.8K | Jan 1993 – Jul 2025 |
| Hankamer, E.C. O-3-9815 | S & S Operating Company, Inc. only | Stowell (Discorbis) | — | 1 | 45.8K | 2.52K | Jan 1993 – Jul 2026 |
| Hankamer Foundation O-3-25943 | Tri-C Resources, LLC only | G. Herbst (11400 Wilcox) | Newton | 1 | 41.1K | 534K | May 2012 – Feb 2021 |
| Hankamer Unit O-3-23737 | Bagley, Roy only | Stowell (Miocene 6430) | Chambers | 1 | 39.2K | 0 | Oct 1999 – Jul 2026 |
| Weaver O-3-25370 | Gaither Petroleum Corporation only | Hankamer | Chambers | 1 | 39K | 0 | Jan 2009 – Apr 2015 |
| Harris, Mattie B. O-3-20913 | Caskids Operating Company only | Hankamer, SE. (Seg SE Frio Up.) | Liberty | 1 | 38.1K | 12.2K | Jan 1993 – Jul 1997 |
| Crow, W.C. O-3-20156 | Gaither Petroleum Corporation only | Hankamer (Miocene Sand) | Liberty | 2 | 35.1K | 1.98K | Jan 1993 – Nov 2025 |
| Krahl, D. -C- O-3-1869 | Gaither Petroleum Corporation only | Hankamer | — | 1 | 32.8K | 17.6K | Jan 1993 – Nov 2025 |
| Hankamer 1052 O-3-17443 | Continental Operating Co. only | Devils Pocket, West | Newton | 1 | 32.7K | 54.5K | Jan 1993 – Jun 2015 |
| Willcox, G. C. O-3-21064 | Finley Resources, Inc. only | Hankamer, SE. (Seg B Frio) | Chambers | 1 | 31.2K | 17.3K | Jan 1993 – Jun 2024 |
| Cole, Thelma J. O-10-18620 | Hankamer, Curtis Corporation,the only | Vincent, S. (Strawn) | — | 2 | 30.1K | 171K | Jan 1993 – Jul 2026 |
| Hankamer, Earl O-9-6389 | BCP Resources, LLC only | Spraberry (Trend Area) | Reagan | 2 | 28.9K | 163K | Jan 1993 – Jul 2026 |
| Hankamer, E. C. O-3-21187 | Puls, W. L. only | Stowell (Miocene 6430) | Chambers | 1 | 28.8K | 6.83K | Jan 1993 – Apr 1999 |
| Hayes-Albritton Est. -A- O-3-22329 | New Horizon Resources LLC only | Hankamer | Chambers | 1 | 27K | 9.74K | Mar 1994 – Aug 2023 |
| Hankamer O-3-17049 | Hilcorp Energy Company only | Gist (Walden) | Newton | 5 | 24.3K | 21.4K | Jan 1993 – Aug 2000 |
| Hankamer "A" O-3-20387 | Samedan Oil Corporation only | Stowell (8590 Marginulina Sand) | Jefferson | 2 | 23.3K | 2.34K | Jan 1993 – Dec 1998 |
| Crow, W. C. -A- O-3-20169 | Gaither Petroleum Corporation only | Hankamer (Miocene Sand) | Liberty | 2 | 20K | 1.05K | Jan 1993 – Jun 2014 |
| Wilcox, G. C. O-3-23012 | Finley Resources, Inc. only | Hankamer (Wilcox Marg 1) | Chambers | 1 | 17.8K | 9.49K | Mar 1996 – Jun 2024 |
| Hankamer, et Al O-3-23186 | Offshore Group, Inc. The only | Yomamma (Yegua 4) | Newton | 1 | 17.2K | 9.51K | Jun 1995 – Jul 2026 |