| Hamill Unit O-11-66151 | El Ran, Inc. only | Levelland | Hockley | 35 | 2.38M | 472K | Jan 1993 – Apr 2026 |
| Hamill, T. A. O-11-3674 | Hilcorp Energy Company only | Levelland | Hockley | 6 | 404K | 225K | Jan 1993 – Apr 2026 |
| Madison-Hamill 36B O-10-56543 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 306K | 381K | Sep 2021 – Apr 2026 |
| Madison-Hamill 36A O-10-56506 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 305K | 387K | Sep 2021 – Apr 2026 |
| Madison-Hamill 36D O-10-56527 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 292K | 451K | Sep 2021 – Apr 2026 |
| Madison-Hamill 36C O-10-56561 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 1 | 285K | 388K | Sep 2021 – Apr 2026 |
| Hamill, Flora O-11-61630 | Hamill, Flora Oil Co. only | Levelland | Hockley | 4 | 232K | 169K | Jan 1993 – Apr 2026 |
| Hamill, Paul "1" O-11-61688 | El Ran, Inc. only | Levelland | Hockley | 3 | 152K | 149K | Jan 1993 – Apr 2026 |
| Hamill Unit A-118 G-6-155391 | Arcadia Energy Resources, LLC only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 144K | 2M | Jul 1995 – Apr 2026 |
| Hamill Estate G-3-140785 | Daylight Petroleum LLC only | Milton, N. (13000) | Harris | 1 | 129K | 10.6M | Jan 1993 – Apr 2026 |
| Hamill Foundation , et Al O-6-15667 | Cypress Operating, Inc. only | Fairway (Massive Anhydrite) | Anderson | 1 | 101K | 0 | Oct 2018 – Apr 2026 |
| Hamill Gas Unit #1 G-3-149628 | Petrotx Operating, LLC only | Milton, N. (13000) | Harris | 1 | 84.5K | 2.41M | Nov 1993 – Apr 2026 |
| Mikeska-Blum O-3-19312 | Goodrich Petroleum Company only | Mikeska-Hamill (Wilcox 8630) | Austin | 1 | 77.6K | 61.5K | Jan 1993 – Nov 2001 |
| Hamill G. U. #3 G-3-40559 | Petrotx Operating, LLC only | Milton, N. (13000) | Harris | 1 | 73.6K | 1.66M | Jan 1993 – Apr 2026 |
| Hamill Gas Unit #1 G-3-39890 | Petrotx Operating, LLC only | Milton, N. (13000) | Harris | 1 | 72.5K | 1.89M | Jan 1993 – Apr 2026 |
| Hamill Estate G-3-155954 | Daylight Petroleum LLC only | Milton, N. (13000) | Harris | 1 | 62K | 5.48M | Aug 1994 – Apr 2026 |
| Dyco-Hamill-McDonald O-3-11496 | B.O. Oil Company only | Cleveland, North | Liberty | 2 | 44.3K | 2.02K | Jan 1993 – Mar 2026 |
| Hamill Gas Unit G-3-203325 | Texas, Les & Co. only | Hull, South (Yegua 8500) | Liberty | 1 | 31K | 1.81M | Jul 2004 – Aug 2020 |
| McDonald, Hamill #1 O-3-22700 | B.O. Oil Company only | Cleveland, North | Liberty | 1 | 23.8K | 2.89K | Mar 1995 – Jan 2007 |
| Hamill Gas Unit #2 G-3-40188 | EOG Resources, Inc. only | Milton, N. (13000) | Harris | 1 | 19.3K | 334K | Sep 1993 – Mar 2000 |
| Hamill (Wilcox) Gas Unit No. 1 G-3-154069 | Petrotx Operating, LLC only | Milton, N. (9800 Wilcox) | Harris | 1 | 12.9K | 188K | Feb 1995 – Sep 2016 |
| Hamill O-3-25204 | Union Gas Operating Company only | Village Mills, W. (Wilcox 9150) | Hardin | 1 | 3.36K | 27.4K | Jun 2007 – Jun 2010 |
| Warmke O-3-23542 | Goodrich Petroleum Company only | Mikeska-Hamill (Wilcox 8630) | Austin | 1 | 2.6K | 0 | Aug 1998 – Feb 2000 |
| Hamill O-11-61712 | Bee-Jay Petro, Inc. only | Levelland | Hockley | 1 | 993 | 21 | Jan 1993 – Mar 1996 |
| Mertz, M. L. et Al G-9-85427 | Silver Oil & Gas Inc. only | Mertz-Hamill (Canyon Lower) | Schleicher | 1 | 679 | 273K | Jan 1993 – Mar 2026 |
| Hamill-Ellis O-10-7967 | Narbo Farms, Ltd. only | Wheat | Loving | 2 | 485 | 6 | Jan 1993 – Jun 1993 |
| Hamill Gas Unit #3 G-3-151235 | EOG Resources, Inc. only | Milton, N. (9800 Wilcox) | Harris | 1 | 424 | 597K | Sep 1994 – Feb 2000 |
| Hamill O-3-25157 | Union Gas Operating Company only | Long Station (Wilcox) | Hardin | 1 | 297 | 5.81K | Jan 2007 – Jun 2007 |
| Hamill Energy Co., et Al G-3-179483 | Carrizo Oil & Gas, Inc. only | Cleveland, N. (Cockfield 5600) | Liberty | 1 | 220 | 170K | Oct 2000 – Jul 2001 |
| Hamill, Florence 26 G-9-103316 | Toc Energy Resources, LLC only | Phyllis Sonora (Canyon Lower) | Sutton | 1 | 140 | 366K | Jan 1993 – Apr 2026 |
| Duncan-Hamill G-3-171616 | Zinn Petroleum Co. only | Spanish Camp (Yegua 7200) | Wharton | 1 | 129 | 38.1K | Jan 1999 – Jun 1999 |
| Florence Hamill 26 O-9-18135 | Toc Energy Resources, LLC only | Phyllis Sonora (Clearfork) | Sutton | 1 | 114 | 159 | Dec 2012 – Jun 2020 |
| Hamill, Florence 26 G-9-103326 | Toc Energy Resources, LLC only | Phyllis Sonora (Canyon Lower) | Sutton | 1 | 93 | 444K | Jan 1993 – Mar 2026 |
| Benignus, Carl E. O-3-4745 | Hamill, Claud B. Estate Of only | Rotherwood (Cockfield -a- Sd.) | Harris | 1 | 62 | 56 | Jan 1993 – Mar 1993 |
| Duncan-Hamill G-3-170249 | Zinn Petroleum Co. only | Egypt (Cook MTN) | Wharton | 1 | 58 | 2.98K | Aug 1998 – Nov 1998 |
| Hamill, Florence 26 G-9-170382 | Byrd Operating Company only | Phyllis Sonora (Canyon Lower) | Sutton | 1 | 14 | 52.7K | Sep 1998 – Nov 2005 |
| Hamill & Hamill G-3-210820 | Eagle Oil & Gas Co. only | Sargent, South (4230 Stray) | Matagorda | 1 | 4 | 707K | Jun 2005 – Mar 2014 |
| Ogu (Hamill, S. -2) G-5-145275 | XTO Energy Inc. only | Opelika (Travis Peak) | Henderson | 1 | 2 | 614K | Mar 1993 – Feb 2011 |
| Hamill & Hamill G-3-211174 | Eagle Oil & Gas Co. only | Sargent, South (4100) | Matagorda | 1 | 1 | 263K | Aug 2005 – Feb 2014 |
| Hamill (Yegua) Gas Unit NO 1 O-3-12978 | EOG Resources, Inc. only | Bammel (D-Y) | Harris | 1 | 0 | 0 | — |
| McDonald, Hamill O-3-20487 | Shidler, Mark L., Inc. only | Cleveland, North | Liberty | 1 | 0 | 0 | — |
| Hamill Energy Co., Etal O-3-23822 | Carrizo Oil & Gas, Inc. only | Wildcat | Liberty | 1 | 0 | 0 | — |
| Sentell, Lois O-11-6230 | Hamill, Claud B. Estate Of only | Snyder, N (Strawn Zone B) | Scurry | 2 | 0 | 0 | — |
| Ogu (Hamill, Sallie -1) G-5-174504 | Urban Oil & Gas Group, LLC only | Opelika (Rodessa) | Henderson | 1 | 0 | 0 | — |
| Hamill Yegua Gas Unit No. 1 G-3-41521 | EOG Resources, Inc. only | Bammel (6950) | Harris | 1 | 0 | 0 | — |
| Hamill Yegua Gas Unit No. 1 G-3-41522 | EOG Resources, Inc. only | Bammel (7070) | Harris | 1 | 0 | 0 | — |
| Duncan,donald &f.b. G-3-56639 | Hamill, Claud B. Estate Of only | Spanish Camp (Hungerford 2800) | Wharton | 1 | 0 | 0 | — |
| Hamill & Hamill G-3-77877 | Wynn-Crosby Operating, Ltd. only | Sargent, South (3850) | Matagorda | 1 | 0 | 0 | — |
| Hamill & Hamill G-3-97238 | Graham Royalty, Ltd. only | Sargent, South (3480) | Matagorda | 1 | 0 | 0 | — |
| Hamill & Hamill G-3-98764 | Graham Royalty, Ltd. only | Sargent, South (5280) | Matagorda | 1 | 0 | 0 | — |