| Hawkeye A O-10-36840 | Hilcorp Energy Company only | Mash (Devonian) | Ector | 1 | 30.9K | 112K | May 2002 – Sep 2025 |
| Parkey Unit G-13-204941 | Lime Rock Resources IV-a, L.P. only | Newark, East (Barnett Shale) | Denton | 1 | 30.3K | 1M | Nov 2004 – Apr 2026 |
| Moss, J.H. O-10-34218 | Hallwood Petroleum, Inc. only | Keystone (Holt) | Winkler | 4 | 30.1K | 36.9K | May 1994 – Sep 1995 |
| South Keystone /Ellen/ Unit G-10-140449 | Pennzoil Exploration & Prod. Co. only | Keystone (Ellenburger) | Winkler | 1 | 30K | 152K | Jan 1993 – Jul 1997 |
| Mackey Heirs O-6-14357 | Dallas Production Company LLC only | Willow Springs (T.peak Trans.) | Gregg | 1 | 30K | 621K | Nov 2004 – Apr 2026 |
| Blocker-Key O-6-14797 | Smith Resources, L.L.C. only | Bethany (Travis Peak Cons.) | Harrison | 1 | 30K | 350K | Mar 2008 – Apr 2026 |
| Turkey Track 186 O-8-31981 | Midland Oil and Gas, Inc. only | Hat Top Mountain, N. (Fry Sd.) | Nolan | 2 | 30K | 11.4K | Feb 2016 – Apr 2026 |
| J. R. Parkey O-13-33743 | Gilmore, Leo Oil, Inc. only | Archer County Regular | Archer | 1 | 30K | 0 | May 2018 – Apr 2026 |
| Mackey O-10-39307 | Endeavor Energy Resources L.P. only | Parks (Consolidated) | Midland | 2 | 29.9K | 68.1K | Apr 2009 – Apr 2015 |
| Zachary, W. G. O-10-3281 | Juno Operating Company III, LLC only | Keystone (Colby) | Winkler | 5 | 29.9K | 17.3K | Jan 1993 – Jun 2019 |
| Stonegate O-10-50107 | Paladin Petroleum III, L.L.C. only | Keystone (San Andres) | Winkler | 1 | 29.9K | 6.86K | Feb 2018 – Dec 2019 |
| Waddell-Key O-11-69188 | Canan Mowrey Operating, LLC only | Iron Bridge (Tannehill a Sand) | Dickens | 1 | 29.7K | 0 | Dec 2007 – Apr 2019 |
| Hendrick, T. G. Est O-8-28854 | Williams Deville Operating, Inc. only | Turkey Hill, N. | Haskell | 3 | 29.5K | 0 | Jul 2000 – May 2017 |
| Parkey, James R. Jr -A- O-13-19615 | Memorial Production Oper. LLC only | Parkey, Northeast (Caddo) | Archer | 4 | 29.4K | 21 | Jan 1993 – Mar 2010 |
| Key Brothers O-13-27412 | Walker Operating (I) only | Neal | Archer | 1 | 29.1K | 21 | Jan 1993 – Apr 2026 |
| Peavy, S. H. #20 O-13-26419 | Kroh Operating LLC only | McCluskey, N. (1850 Sand) | Young | 1 | 29.1K | 2.68K | Jan 1993 – Jan 2020 |
| Lewis O-3-21027 | Intercoastal Energy, Inc. only | Buckeye (Frio F-3) | Matagorda | 1 | 29K | 22 | Jan 1993 – Aug 2001 |
| Parkey, J. R. O-13-5 | DM Backhoe Service only | Archer County Regular | Archer | 9 | 29K | 20 | Jan 1993 – Apr 2026 |
| Key O-11-62737 | Gray, Gordon Operator only | Revilo (Glorieta) | Scurry | 5 | 28.6K | 92 | Jan 1993 – Apr 2026 |
| Stuckey/Upchurch Unit A O-3-26744 | Contango Resources, Inc. only | Madisonville, W. (Woodbine -A-) | Grimes | 1 | 28.5K | 773K | Aug 2013 – Jul 2019 |
| Joyce Key O-1-4864 | Tri-C Resources Partners I, LLC only | Nixon, East (6100) | Gonzales | 1 | 28.3K | 119 | Jan 1993 – Apr 2026 |
| Bulldog 2 O-14-7891 | Chesapeake Operating, L.L.C. only | Shreikey (Granite Wash) | Roberts | 1 | 28.3K | 42.6K | Jul 2008 – Aug 2013 |
| Green, W. H.-Key O-8-3371 | Basin Operating Inc. only | Shackelford County Regular | Shackelford | 2 | 28.2K | 175 | Jan 1993 – Apr 2026 |
| Bashara, M.J. O-10-52034 | Hilcorp Energy Company only | Keystone (Dev-McKee Cons) | Winkler | 8 | 27.7K | 91.9K | Mar 2019 – Apr 2026 |
| Lovett, H. E. -C- O-10-3313 | Whiting Oil and Gas Corporation only | Keystone (Colby) | Winkler | 2 | 27.7K | 9.06K | Jan 1993 – Jun 2022 |
| Mackey Heirs G-6-143362 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 27.7K | 3.63M | Jan 1993 – Nov 2024 |
| Jenkins, B.F. O-10-51477 | Formentera Operations LLC only | Keystone (Dev-McKee Cons) | Winkler | 4 | 27.7K | 67.6K | Mar 2019 – Apr 2026 |
| Keystone-Jenkins O-10-3421 | Walsh & Watts, Inc. only | Keystone (Silurian) | Winkler | 2 | 27.5K | 115K | Jan 1993 – Feb 2019 |
| Vastar Fee 307 O-3-22797 | Neches Transport Inc. only | Turkey Bayou (Upper Wilcox) | Tyler | 2 | 27.5K | 84.5K | Jun 1995 – Dec 2008 |
| Primero O-10-58149 | Formentera Operations LLC only | Keystone (Wolfcamp) | Winkler | 1 | 27.5K | 432K | Oct 2022 – Apr 2026 |
| Esn Keyes O-9-16095 | RHB Exploration & Production,llc only | Madora (Tillery) | Tom Green | 1 | 27.4K | 41.5K | Dec 2006 – Apr 2026 |
| State-Walton G-10-279776 | Basin Oil & Gas Operating, LLC only | Keystone (Consolidated) | Winkler | 1 | 27.2K | 82.3K | Sep 2015 – Apr 2026 |
| Walton, J. B. -A- G-10-155826 | Bopco, L.P. only | Keystone (Ellenburger) | Winkler | 1 | 26.9K | 4.3M | Sep 1995 – May 2011 |
| Bashara, J. M. O-10-46979 | Formentera Operations LLC only | Keystone (Consolidated) | Winkler | 1 | 26.6K | 11.9K | Sep 2015 – Apr 2026 |
| Parkey, J. R., Jr., Etal, -A- O-13-12691 | SBG Resources Group LLC only | Archer County Regular | Archer | 2 | 26.5K | 91 | Jan 1993 – Apr 2026 |
| Parkey "A" O-13-30157 | Wilson, Jake only | Dukiel (Thomas Sand) | Archer | 15 | 26.5K | 0 | Apr 2003 – May 2025 |
| Smith, F. J. O-4-3218 | South Central Texas Oil & Gas Co only | Turkey Creek (4000 Sand) | Nueces | 2 | 25.6K | 16.9K | Jan 1993 – Feb 2005 |
| McCutchen O-10-28440 | A&m Oil & Gas LLC only | Keystone (Colby) | Winkler | 5 | 25.6K | 439K | Jan 1993 – Apr 2026 |
| Taylor-Hanks Unit O-10-35081 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 25.6K | 43.7K | Jun 1996 – Feb 2001 |
| Keystone Cattle Co. O-10-3384 | Mineral Technologies, Inc. only | Keystone (Holt) | Winkler | 1 | 25.3K | 1.69K | Jan 1993 – Aug 2015 |
| Parkey, J. R., -A- O-13-580 | Pautsky, Jimmy only | Archer County Regular | Archer | 12 | 25.2K | 21 | Jan 1993 – Jun 1999 |
| Johnson, Maxine O-9-13500 | McCammon Oil & Gas, Inc. only | Bilmik (Harkey) | Concho | 2 | 25.2K | 15 | Jul 1993 – Apr 2006 |
| Bashara, M. J., -B- O-10-51575 | Hilcorp Energy Company only | Keystone (Dev-McKee Cons) | Winkler | 2 | 25.2K | 41.4K | Mar 2019 – Apr 2026 |
| Bashara, M. J. -C- G-10-20394 | Hilcorp Energy Company only | Keystone (Dev-McKee Cons) | Winkler | 1 | 24.7K | 1.08M | Jan 1993 – Jun 2025 |
| Langford, et Al O-13-20871 | Key Energy of Colorado, Inc. only | Bent Tree (6350) | Hardeman | 2 | 24.5K | 15.8K | Jan 1993 – May 2005 |
| Huskey, L. C. O-8-3539 | Mesquite Land & Minerals Co. only | Shackelford County Regular | Shackelford | 51 | 24.5K | 21 | Jan 1993 – Jul 2016 |
| Parkey, J. R. O-13-1138 | Gilmore, Leo Oil, Inc. only | Mankins | Archer | 2 | 24.5K | 140 | Jan 1993 – Apr 2026 |
| Kralj, N. O-6-12596 | Key Production Co. only | Lane Chapel (Paluxy B Sand) | Smith | 1 | 24.5K | 49.6K | Jan 1993 – Jun 1994 |
| Blocker-Key O-6-14238 | Smith Resources, Inc. only | Bethany (Travis Peak a Sand) | Harrison | 1 | 24.4K | 232K | Aug 2003 – Feb 2008 |
| Keystone Cattle Co. O-10-3282 | XTO Energy Inc. only | Keystone (Colby) | Winkler | 55 | 24.4K | 776K | Jan 1993 – Sep 2000 |