| Cook Ranch 117 O-8-32343 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 1 | 4.17K | 0 | Oct 2019 – Apr 2026 |
| Northington G-3-171901 | Hilcorp Energy Company only | Egypt (Upper Cook Mtn.) | Wharton | 1 | 4.14K | 536K | Dec 1998 – Mar 2013 |
| Felderhoff O-13-22092 | HWH Production, LLC only | Cooke County Regular | Cooke | 5 | 4.13K | 181 | Jan 1993 – Oct 2019 |
| Simmons G-3-223374 | Amrwr, LLC only | Barb-Mag, SE. (Cook Mountain) | Fort Bend | 1 | 4.08K | 388K | Mar 2006 – Sep 2008 |
| Fleitman, Katie O-13-14828 | WFW Production Company, Inc. only | Cooke County Regular | Cooke | 1 | 4.08K | 42 | Jan 1993 – Oct 2017 |
| Merta Heirs Unit G-3-287774 | Ricochet Energy, Inc. only | Alwan (Cook Mountain) | Wharton | 1 | 4.07K | 204K | Jun 2019 – Jun 2021 |
| Yaeger Heirs G-4-143393 | JRG Exploration, Inc. only | Hellen (2ND Cook Mtn.) | Jim Hogg | 1 | 4.07K | 278K | Jan 1993 – May 2008 |
| Dylla, Gary O-1-12408 | Miller, W. C. Operating Company only | Cooksey | Wilson | 1 | 4.06K | 1K | Jan 1993 – Aug 1996 |
| Ramsey, E. G. O-13-2036 | Bayer, Frances E. Rev Liv Trust only | Cooke County Regular | Cooke | 1 | 4.06K | 20 | Jan 1993 – Sep 2015 |
| Blakely -A- O-13-27524 | BP Petroleum Operations, LLC only | Cooke County Regular | Cooke | 2 | 4.02K | 157 | Jan 1993 – Aug 2016 |
| McGrede G-6-175568 | Cook Exploration Co. only | Willow Springs (Cotton Valley) | Gregg | 1 | 4K | 1.43M | Oct 1999 – Apr 2026 |
| Cook O-8-22350 | Canan Operating, Inc. only | Pecan Bayou (Ellen.) | Callahan | 1 | 3.98K | 20 | Jan 1993 – Mar 1996 |
| Miller, F. A. O-13-10256 | Brammer Petroleum, Inc. only | Cooke County Regular | Cooke | 1 | 3.95K | 2 | Apr 1993 – Apr 2025 |
| Jones, Laura, Mrs. O-13-11244 | Harper, Wayne only | Cooke County Regular | Cooke | 2 | 3.95K | 21 | Jan 1993 – Jan 2002 |
| Cook-Holt Unit O-8-11552 | Ipact only | Flo-Mar (Tannehill) | Jones | 3 | 3.9K | 90 | Jan 1993 – Apr 2003 |
| Cook-Holt Unit O-8-11519 | Colo Exploration Company, Inc. only | Jones County Regular | Jones | 16 | 3.87K | 63 | Jan 1993 – Feb 2000 |
| Lee, Allan G-2-174418 | A & D Exploration Company only | Cook, S. (Wilcox, Lo. 11370) | De Witt | 1 | 3.82K | 115K | Jun 1999 – Apr 2006 |
| Kgfcu G-3-165095 | Hilcorp Energy Company only | Katy (Cook Mountain 2) | Waller | 1 | 3.82K | 726K | Aug 1997 – Aug 2025 |
| Meador, S. D. -B- O-13-2097 | Mountain Creek Oil Company, Inc. only | Cooke County Regular | Cooke | 9 | 3.81K | 20 | Jan 1993 – Apr 2026 |
| Ivy H O-8-31294 | JNS Production, LLC only | Cook Ranch | Shackelford | 2 | 3.81K | 0 | Jul 2013 – Sep 2025 |
| Tyra, Lewis O-3-16306 | Fredonia Resources Inc. only | Benchmark Rankin (Cook Mountain) | Harris | 1 | 3.81K | 234K | Jan 1993 – Jun 1998 |
| Hendrick, T. G. Est. F. O-8-28122 | G & F Oil, Inc. only | Bridwell-Hendrick (Cook, Lower) | Haskell | 2 | 3.81K | 4.12K | Feb 1997 – Jan 2021 |
| Daniel O-9-14896 | Pickens Company, Inc., The only | Highway (Lo. Cook) | Concho | 1 | 3.78K | 24 | Apr 1999 – Mar 2001 |
| Deussen Estate A G-3-263044 | Ballard Exploration Company,inc. only | Deusson Estate (Cook Mntn 2) | Harris | 1 | 3.78K | 214K | Aug 2010 – Oct 2019 |
| Nail 120 O-8-32732 | Bluff Creek Petroleum, LLC only | Cook Ranch | Shackelford | 3 | 3.78K | 0 | Nov 2023 – Apr 2026 |
| Cook, J. T. O-13-32855 | Proco Operating Co., Inc. only | KRS (Marble Falls) | Palo Pinto | 1 | 3.76K | 275K | Oct 2013 – Dec 2019 |
| Yaeger Heirs G-4-147628 | JRG Exploration, Inc. only | Hellen (2ND Cook Mtn.) | Jim Hogg | 1 | 3.76K | 420K | Dec 1993 – Nov 1996 |
| Key O-8-29340 | Fourcooks Oil & Gas, LLC only | Throckmorton County Regular | Throckmorton | 1 | 3.76K | 11 | Jan 2004 – Apr 2026 |
| Cooke G-6-90856 | TGNR East Texas LLC only | Carthage (Cotton Valley) | Panola | 1 | 3.72K | 832K | Jan 1993 – Dec 2017 |
| Schorre G-2-150784 | Araxas Exploration, Inc. only | Cook, S. (Wilcox, Lo. 11370) | De Witt | 1 | 3.69K | 165K | May 1994 – Jan 1996 |
| Cis G-2-202458 | Chesapeake Operating, Inc. only | Ander (Cook Mountain) | Goliad | 1 | 3.68K | 626K | Oct 2003 – Apr 2012 |
| Simek-Cook Unit G-2-221061 | Atlas Operating LLC only | Yoakum (Wilcox 7300) | De Witt | 1 | 3.67K | 125K | Jul 2006 – Sep 2009 |
| Cooke G-6-98592 | TGNR East Texas LLC only | Carthage (Cotton Valley) | Panola | 1 | 3.61K | 1.35M | Jan 1993 – Apr 2026 |
| Winding Brook Corporation G-4-199672 | Merit Energy Company only | McCook, SE (Vicksburg Deep) | Hidalgo | 1 | 3.61K | 3.14M | Jan 2004 – Apr 2026 |
| Wynn, John T. G-3-175704 | Great Western Drilling Company only | Egypt (Cook MTN) | Wharton | 1 | 3.6K | 520K | Feb 2000 – Sep 2010 |
| Houston Arts Endowment G-3-282469 | Ballard Exploration Company,inc. only | Devers, NW. (Lower Cook Mtn. 1) | Liberty | 1 | 3.6K | 64.5K | Feb 2017 – Jun 2017 |
| Kieler Heirs G-3-253419 | Choice Exploration, Inc. only | Moreland Ranch (8140 Cook Mtn.) | Wharton | 1 | 3.56K | 279K | Sep 2009 – Dec 2010 |
| Cook O-10-33501 | Arkland Producing Co., Inc. only | Dewey Lake, S. (Wolfcamp) | Glasscock | 1 | 3.52K | 2.3K | Jan 1993 – Feb 1997 |
| Kleiss -A- O-13-2101 | Grewing, Herman Operating, Inc. only | Cooke County Regular | Cooke | 2 | 3.48K | 20 | Jan 1993 – Apr 2026 |
| Morton, Dorothy O-13-15675 | Maverick Production only | Cooke County Regular | Cooke | 1 | 3.48K | 18 | Jan 1993 – Mar 2003 |
| Margo "A" G-4-199599 | Starr Operating, LLC only | Arroyo Grande, W. (Cook Mt.) | Starr | 1 | 3.46K | 122K | Jan 2004 – Feb 2016 |
| Solomon, W. F. -G- O-13-2210 | Big Country Pipe & Supply, Inc. only | Cooke County Regular | Cooke | 5 | 3.45K | 20 | Jan 1993 – Dec 2014 |
| Reaves-Dye "A" G-2-186759 | Hilcorp Energy Company only | Marshall, E. (Cook MOUNTAIN5460) | Goliad | 1 | 3.44K | 266K | Sep 2001 – Apr 2011 |
| Towery O-13-30976 | Seitz, J. R. & Adam, Ltd. only | Cooke County Regular | Cooke | 1 | 3.44K | 0 | Feb 2008 – Feb 2009 |
| Cooks Point 'A' O-3-25189 | Magnolia Oil & Gas Operating LLC only | Giddings (Buda) | Burleson | 1 | 3.43K | 25.4K | Apr 2008 – Jun 2012 |
| Cook-Billingsley O-8-19918 | Seven Wells Oil & Gas Expl. only | Lake Kirby | Taylor | 6 | 3.43K | 61 | Jan 1993 – Jan 1998 |
| Cook, Maggie G-6-39444 | SM Operating Company LLC only | Hughey (Crane) | Harrison | 1 | 3.42K | 647K | Jan 1993 – Mar 2026 |
| Bayer, M. B. -B- O-13-9775 | DSB Energy, LLC only | Cooke County Regular | Cooke | 2 | 3.4K | 96 | Jan 1993 – Nov 2006 |
| North Beaver Unit O-13-24092 | R & R Energy, Ltd. only | Cooke County Regular | Cooke | 1 | 3.39K | 61 | Jan 1993 – Apr 2026 |
| Howsley (Nees) O-8-19158 | Fourcooks Oil & Gas, LLC only | Throckmorton County Regular | Throckmorton | 4 | 3.29K | 21 | Jan 1993 – Feb 2026 |