| Clarkson, E. O-2-5538 | Prime Operating Company only | Gaffney, SW. (5300) | Goliad | 1 | 87.7K | 21 | by Jan 1993 – Dec 2018 |
| Selected Lands O-3-17065 | P.o.&g. Operating, LLC only | Iola, South (Sub-Clarksville) | Grimes | 3 | 87.5K | 10.3K | by Jan 1993 – Jun 2018 |
| Wood, Clark O-11-62719 | Stelzer Drilling Co. Inc. only | Ridge, South (Glorieta) | Crosby | 7 | 87.3K | 20 | by Jan 1993 – Aug 2026 |
| Clark -B- O-10-31729 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 2 | 85.9K | 451K | by Jan 1993 – Aug 2026 |
| Cox Unit 1 O-3-17133 | Chaparral Energy, L.L.C. only | Iola, South (Sub-Clarksville) | Brazos | 2 | 85.1K | 232K | by Jan 1993 – Apr 2011 |
| Charles D. Clark 1H G-14-277950 | Presidio Petroleum LLC only | Clark Martin (Granite Wash) | Roberts | 1 | 84.8K | 2.41M | Apr 2015 – Aug 2026 |
| Clark 94 O-14-8411 | Courson Oil & Gas, Inc. only | Pan Petro (Cleveland) | Ochiltree | 1 | 84K | 772K | Nov 2010 – Aug 2026 |
| Granger O-11-69083 | Clark, John M., Inc. only | Dust Devil (San Andres) | Gaines | 1 | 83.6K | 9.84K | Apr 2007 – Aug 2026 |
| Lockler, T.H. Unit O-6-10532 | Tower Resources Inc only | Slocum, North (Sub-Clarksville) | Anderson | 1 | 83.6K | 348K | by Jan 1993 – Aug 2026 |
| Windham-Clark 103 Unit G-9-214430 | Southwest Royalties, Inc. only | Amacker-Tippett (Devonian) | Upton | 1 | 83.4K | 1.13M | Feb 2005 – Aug 2026 |
| Clark O-9-12769 | P1 Energy, LLC only | Taos (Canyon) | Irion | 3 | 82K | 534K | by Jan 1993 – Mar 2025 |
| Clark, Hinds O-13-14772 | Crest Operating Company only | Heydrick (Congl.) | Montague | 1 | 81.9K | 1.77K | by Jan 1993 – Aug 2026 |
| Hurliman O-6-13654 | HD Operating Co, LLC only | Pittsburg (Sub-Clarksville) | Camp | 3 | 81.8K | 0 | Mar 1997 – May 2023 |
| Lennox Unit O-6-13717 | TMR Exploration, Inc. only | Domino (Clarksville) | Red River | 1 | 80.5K | 0 | Aug 1997 – Jul 2008 |
| Clarkson Ranch O-9-13550 | Endeavor Energy Resources L.P. only | Spraberry (Trend Area) | Reagan | 5 | 80.3K | 494K | Jan 1994 – Jan 2024 |
| Killgo, J. T. O-6-4748 | Tower Resources Inc only | Slocum, S. (Sub-Clarksville) | Anderson | 1 | 80.3K | 998K | by Jan 1993 – Aug 2026 |
| City H & F Properties Gas Unit G-4-192121 | EOG Resources, Inc. only | Clarkwood, S. (Moore) | Nueces | 1 | 80.2K | 3.61M | Oct 2002 – Oct 2007 |
| Cleveland, Jon O-3-23218 | Barrow-Shaver Resources Co. only | BSR (Sub-Clarksville) | Madison | 1 | 79.8K | 46.5K | Apr 1997 – Nov 2002 |
| Judy Clark State C19-16 G-10-288190 | Diamondback E&P LLC only | Phantom (Wolfcamp) | Reeves | 1 | 79.6K | 313K | May 2013 – Jul 2021 |
| Pollard, O. D. O-6-875 | Southwest Operating, Inc.-Tyler only | Manziel (Sub-Clarksville) | Wood | 2 | 79K | 149 | by Jan 1993 – Aug 2026 |
| Clark Gas Unit II G-2-223305 | Petrovybe Opco LLC only | Christmas, Deep (Wilcox 10800) | De Witt | 1 | 78.6K | 5.6M | Aug 2006 – Jul 2019 |
| Holley, M. E. -A- O-6-5417 | Southwest Operating, Inc.-Tyler only | Manziel (Sub-Clarksville) | Wood | 1 | 78.4K | 352 | by Jan 1993 – Aug 2026 |
| Black Stone Clarke A-169 G-6-294623 | Zarvona Energy LLC only | Brookeland (Austin Chalk, 8800) | Tyler | 1 | 77.7K | 2.53M | Oct 2022 – Aug 2026 |
| Wood, Clark O-11-68057 | Juno Operating Company II, LLC only | Hoople (Clear Fork) | Crosby | 5 | 77.1K | 0 | Apr 1999 – Dec 2012 |
| Johnston, W. L. O-6-882 | Southwest Operating, Inc.-Tyler only | Manziel (Sub-Clarksville) | Wood | 1 | 76.1K | 19 | by Jan 1993 – Aug 2026 |
| Mc Elyea, J. H. O-6-5471 | Southwest Operating, Inc.-Tyler only | Manziel (Sub-Clarksville FB A) | Wood | 2 | 76K | 18 | by Jan 1993 – Aug 2026 |
| Pittman, E. N. Etal O-6-884 | Southwest Operating, Inc.-Tyler only | Manziel (Sub-Clarksville) | Wood | 6 | 75.8K | 325 | by Jan 1993 – Aug 2026 |
| Cook "AB" O-5-2858 | Dimock Operating Company only | Como, N.E. (Subclarksville) | Hopkins | 1 | 75.4K | 20 | by Jan 1993 – Dec 2007 |
| Nestor O-5-3413 | Texas Royalty Corp. only | Red Oak (FB-a, Sub Clarksville) | Leon | 1 | 74.9K | 200 | by Jan 1993 – May 2021 |
| Cobb Unit 3 O-3-17051 | Ramtex Energy LLC only | Iola, South (Sub-Clarksville) | Grimes | 1 | 74.2K | 20.6K | by Jan 1993 – Dec 2014 |
| Holmes, Millard O-10-11334 | Clark Oil Co. only | Millard (Queen) | Pecos | 35 | 73.5K | 21 | by Jan 1993 – Aug 2026 |
| Clark O-1-15992 | Hamilton, Clay only | Luling-Branyon | Caldwell | 4 | 73.3K | 0 | Mar 2011 – Aug 2018 |
| Puckett Heirs G-6-100377 | Energy Production Corporation only | Neuhoff (Clarksville) | Wood | 1 | 72.8K | 1.56M | by Jan 1993 – Dec 2013 |
| Clark O-10-14542 | P.o.&g. Operating, LLC only | Clark (Glorieta) | Sterling | 6 | 72.8K | 21 | by Jan 1993 – Aug 2026 |
| Clark-Sain G-4-189119 | Abaco Operating, LLC only | Loco Sueno (Vicksburg QE 1) | Kenedy | 1 | 71.8K | 2.59M | May 2002 – Dec 2025 |
| Clark, L.C. Estate O-10-44622 | Diamondback E&P LLC only | Spraberry (Trend Area) | Glasscock | 1 | 71.5K | 157K | Sep 2013 – Aug 2026 |
| Grice, W. W., Estate -A- O-6-5282 | Atlantis Oil Company, Inc. only | Quitman (Sub-Clarksville) | Wood | 1 | 71.4K | 0 | Jun 2010 – Aug 2026 |
| Clark, L. et al Unit No. 1 G-3-192893 | Karbuhn Oil Company only | Hebert (H-2A) | Jefferson | 1 | 71.1K | 1.34M | Dec 2002 – Apr 2010 |
| Goldsmith, J. B. O-6-1440 | Atlas Operating LLC only | Quitman (Sub-Clarksville) | Wood | 6 | 70.5K | 475 | Aug 1999 – Aug 2026 |
| Blalock, J. R. -A- O-6-1439 | Atlas Operating LLC only | Quitman (Sub-Clarksville) | Wood | 6 | 69.1K | 2.81K | by Jan 1993 – Aug 2026 |
| Wood, Clark "A" O-11-68074 | Juno Operating Company II, LLC only | Hoople (Clear Fork) | Crosby | 20 | 68K | 0 | Mar 1999 – Dec 2012 |
| Lockler O-6-11245 | Tower Resources Inc only | Slocum, S. (Sub-Clarksville) | Anderson | 1 | 67.8K | 354K | by Jan 1993 – Feb 2026 |
| Boyce, B.E., Est. O-6-10103 | HD Operating Co, LLC only | Pittsburg (Sub-Clarksville) | Camp | 2 | 67.7K | 11 | by Jan 1993 – Jul 2023 |
| Florence, J. B., Heirs O-6-5034 | HD Operating Co, LLC only | Pittsburg (Sub-Clarksville -B-) | Camp | 3 | 66.7K | 0 | Sep 1995 – Jul 2026 |
| Kennedy-Butler Unit O-6-10087 | Richey Properties, Inc. only | Quitman (Sub-Clarksville) | Wood | 1 | 66.6K | 144 | by Jan 1993 – Aug 2026 |
| McKenzie, J. F. O-6-2865 | HD Operating Co, LLC only | Pittsburg (Sub-Clarksville) | Camp | 4 | 65.8K | 7 | by Jan 1993 – Aug 2025 |
| Clark Estate "B" 6 O-13-28978 | Karper Oil & Gas Corporation only | Karran, North (Marble Falls) | Young | 1 | 65.6K | 778K | Jun 1995 – Jun 2026 |
| Reid Estate O-3-22891 | Barrow-Shaver Resources Co. only | BSR (Sub-Clarksville) | Madison | 1 | 65.2K | 115K | Jan 1996 – Nov 2002 |
| Clark -A- O-9-12925 | P1 Energy, LLC only | Taos (Canyon) | Irion | 1 | 64.7K | 242K | by Jan 1993 – Aug 2026 |
| Clark Unit G-13-270716 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 64.5K | 651K | May 2012 – Aug 2026 |