| Heard Heirs G-2-199388 | Acock Operating Limited only | Weesatche, S. ( Cook Mt. 5300) | Goliad | 1 | 984 | 191K | Oct 2003 – May 2005 |
| Cook O-10-39292 | Arkland Producing Co., Inc. only | Dewey Lake, S. (Strawn) | Glasscock | 1 | 979 | 65.6K | Mar 1997 – Mar 2008 |
| Duncan G-3-173652 | Mustang Fuel Corporation only | Egypt (Cook Mtn. 8300) | Wharton | 1 | 966 | 102K | Jun 1999 – Dec 1999 |
| Andress -C- O-13-1997 | WFW Production Company, Inc. only | Cooke County Regular | Cooke | 5 | 966 | 21 | Jan 1993 – Sep 2003 |
| Margo G-4-205751 | Newgulf Petroleum, LLC only | Arroyo Grande, W. (Cook Mt.) | Starr | 1 | 955 | 197K | Nov 2004 – Feb 2016 |
| Cook 85WS O-8-30719 | Stasney Well Service, LLC only | Cook Ranch (Strawn Sand) | Shackelford | 4 | 950 | 0 | Feb 2013 – Jan 2015 |
| Newell Ranch G-3 G-8-153997 | Van Operating, Ltd. only | L. G. Cook, N. (Miss.) | Shackelford | 1 | 949 | 300K | Jun 1995 – Feb 2015 |
| Fischer, Aline O-13-15879 | Hawkeye Transmission Company only | Cooke County Regular | Cooke | 2 | 943 | 17 | Jan 1993 – May 1997 |
| Cook Gas Unit O/A G-6-298680 | Stroud Petroleum, Inc. only | Bethel (Pettit) | Anderson | 1 | 942 | 436K | Dec 2024 – Apr 2026 |
| Hicks 183 O-8-31960 | Cinnabar Operating, LLC only | Hat Top Mountain, N. (Cook Lime) | Nolan | 1 | 941 | 8.92K | Jan 2016 – Feb 2019 |
| Pettus Unit G-2-71798 | Nog Production & Operating LLC only | Cabeza Creek (Cook Mtn.) | Goliad | 1 | 939 | 60K | Sep 2010 – Mar 2026 |
| Ware, James -A- O-13-1955 | Atex Exploration & Operating Co. only | Cooke County Regular | Cooke | 1 | 936 | 20 | Jan 1993 – Jan 2003 |
| Harris, T. H. et Al O-13-28340 | Breeze Oil, LLC only | Cooke County Regular | Cooke | 1 | 936 | 115 | Jan 1993 – Feb 2004 |
| Cook Gas Unit G-6-222805 | Fortune Resources LLC only | Blocker (Cotton Valley) | Harrison | 1 | 927 | 428K | Oct 2006 – Mar 2026 |
| Luke, F. L. -B- Lease O-13-9664 | DSB Energy, LLC only | Cooke County Regular | Cooke | 8 | 903 | 67 | Jan 1993 – Nov 2006 |
| Moreland et al Gas Unit G-3-282913 | Oblaen Resources LLC only | Moreland Ranch (7875 Cook Mtn.) | Wharton | 1 | 901 | 187K | Apr 2017 – Aug 2018 |
| Cook, B. M. G-3-129301 | Trivista Operating LLC only | Serbin (Taylor Sand) | Bastrop | 1 | 900 | 144K | Jan 1993 – Feb 2026 |
| Cooke, Travis C. "B" O-1-5710 | Banks,flemming,& Conley Prod LLC only | Salt Flat | Caldwell | 2 | 897 | 19 | Jan 1993 – Jun 2023 |
| Luker G-2-166983 | Coastline Exploration, Inc. only | Brandt, S. (Cook Mt. 5200) | Goliad | 1 | 893 | 57.4K | Jan 1998 – Mar 1999 |
| Randall "A" O-13-31369 | Reed Production, Inc. only | Cooke County Regular | Cooke | 1 | 867 | 0 | Jan 2009 – Apr 2026 |
| Cook Ranch "60 H" O-8-29464 | Stasney, H. R. & Sons, Ltd. only | Cook Ranch | Shackelford | 1 | 862 | 1.88K | Sep 2004 – Nov 2007 |
| Klements -B- O-13-2064 | H and H Prod. Co. only | Cooke County Regular | Cooke | 4 | 861 | 20 | Jan 1993 – May 2003 |
| Turkey Track 216 O-8-31892 | Cinnabar Operating, LLC only | Hat Top Mountain, N. (Cook Lime) | Nolan | 1 | 861 | 2.75K | Jul 2015 – Mar 2016 |
| Bellows O-1-14865 | Beachtex Oil Company, LLC only | Cooke, West (Olmos) | La Salle | 1 | 858 | 80 | Jun 2006 – Jul 2009 |
| Elam "A" G-8-198397 | Pitcock, Inc. only | Doug Cook (Duffer) | Eastland | 1 | 852 | 11.5K | Dec 2003 – Jun 2016 |
| Johnson Cook I Unit G-13-265790 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 840 | 1.57M | Aug 2012 – Apr 2026 |
| Bull Run Unit O-3-28244 | Arcadia Operating, LLC only | Bull Run (Cook MTN 6250) | Polk | 1 | 838 | 0 | Jun 2025 – Apr 2026 |
| Gruetzmacher O-2-8732 | Tema Oil and Gas Company only | Weesatche, West (Cook Mt.) | Goliad | 2 | 836 | 10.5K | Sep 2001 – Aug 2002 |
| Schorre Gas Unit G-2-137183 | Araxas Exploration, Inc. only | Cook, S. (Wilcox, Lo. 11370) | De Witt | 1 | 834 | 21.2K | Jan 1993 – Jan 1995 |
| Martin-Martin Unit O-13-29839 | Multibrands, Ltd. Co. only | Cooke County Regular | Cooke | 1 | 834 | 0 | Sep 2000 – Oct 2001 |
| Cooke, C.N. Unit O-4-11430 | Hunt Oil Company only | Doughty (Frio 8820) | Nueces | 1 | 823 | 3.1K | Jan 1993 – Feb 1993 |
| Cartwright "A" O-1-14915 | Lewis Petro Properties, Inc. only | Cooke Ranch (Olmos) | La Salle | 1 | 814 | 7.82K | Oct 2007 – Apr 2026 |
| Cook Ranch 54A O-8-32194 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 3 | 805 | 0 | Oct 2019 – Mar 2022 |
| Schorlemer, Walter G-2-128128 | B.P. Productions Inc. only | Weesatche, W. (Cook Mt. 5270) | Goliad | 1 | 798 | 98.8K | Jan 1993 – Aug 2003 |
| Poehler, Mary O-2-6241 | Nelson, James L. only | Poehler (Cook Mt.) | Goliad | 1 | 795 | 8.4K | Jan 1993 – Nov 2002 |
| Yaeger Heirs G-4-147851 | JRG Exploration, Inc. only | Hellen (2ND Cook Mtn.) | Jim Hogg | 1 | 787 | 83.1K | Dec 1993 – May 1994 |
| G H Culp O-13-31829 | Seitz, J. R. & Adam, Ltd. only | Cooke County Regular | Cooke | 1 | 776 | 0 | Mar 2011 – Jan 2014 |
| Cook-Clemons G U G-4-182719 | Cantera Operating, LLC only | Monte Christo, N(vicksburg T LO) | Hidalgo | 1 | 761 | 1.51M | Mar 2001 – Nov 2014 |
| Johnson Cook I Unit G-13-262088 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 759 | 1.53M | Mar 2011 – Apr 2026 |
| Kotara, Emil J. et Al G-1-160858 | Cooke Energy Company only | Lyssy (Carrizo -D-) | Wilson | 1 | 751 | 22.2K | Aug 1996 – May 2001 |
| Letcher O-9-12704 | Explo Oil, Inc. only | Letcher (Lower Cook Sand) | Concho | 4 | 747 | 25 | Jan 1993 – Apr 1996 |
| Johnson Cook I Unit G-13-263589 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 745 | 2.21M | Mar 2011 – Apr 2026 |
| Republic G-2-194142 | Texana Operating Company only | Marshall, S.W. (Cook MTN 5500) | Goliad | 1 | 742 | 115K | Nov 2002 – Mar 2005 |
| Hill O-13-28718 | Cooke & Montague Oper. Co., Inc. only | Park Springs (Congl.) | Wise | 1 | 732 | 82 | Jan 1994 – Sep 1997 |
| Kgfcu G-3-291935 | Hilcorp Energy Company only | Katy (Cook Mountain 2) | Waller | 1 | 731 | 97.8K | Oct 2016 – Apr 2026 |
| Smith, N. L. O-13-11211 | Burk Royalty Company only | Cooke County Regular | Cooke | 4 | 729 | 21 | Jan 1993 – Mar 1996 |
| Wilson, G. N. G-3-137116 | Medallion Oil Company only | Jones Creek (Cook Mtn. 8480) | Wharton | 1 | 725 | 164K | Jan 1993 – Oct 1996 |
| Alexander Bros. O-13-1974 | WFW Production Company, Inc. only | Cooke County Regular | Cooke | 1 | 720 | 234 | Jan 1993 – Sep 2024 |
| Margo O-4-13778 | Starr Operating, LLC only | Arroyo Grande, W. (Cook Mt.) | Starr | 1 | 718 | 4.23K | Nov 2012 – Feb 2020 |
| Pautler -B- O-13-18768 | V & H Oil, L.P. only | Cooke County Regular | Cooke | 1 | 716 | 19 | Jan 1993 – Oct 2009 |