| Humphreys G-3-206430 | Hughes Oil Operating, LLC only | Hardin, SW. (H. Daniel Sand) | Liberty | 1 | 76.8K | 4.57M | Nov 2004 – Apr 2015 |
| Barrett G-3-217297 | Heisey Ventures, Inc. only | Hardin, South (Wilcox 12700) | Liberty | 1 | 72.2K | 4.69M | Nov 2005 – Aug 2011 |
| Taub G-3-219256 | Hughes Oil Operating, LLC only | Hardin, South (Wilcox 12700) | Liberty | 1 | 60.8K | 4.39M | Jul 2006 – Apr 2017 |
| Richardson Unit G-3-207368 | Hughes Oil Operating, LLC only | Hardin, SW. (H. Daniel Sand) | Liberty | 1 | 44.6K | 3.98M | Dec 2004 – Jun 2014 |
| Humphreys G-3-206426 | Smith Production Inc. only | Hardin, SW. (H. Daniel Sand) | Liberty | 1 | 37.9K | 2.56M | Nov 2004 – Apr 2006 |
| Finley, W. T. G-3-201242 | Crawford Hughes Operating Co. only | Hardin (Cessna 7400) | Liberty | 1 | 32.7K | 21.3K | Mar 2004 – May 2011 |
| Harding Fee G-10-70323 | Ring Energy, Inc. only | Beall (Ellen) | Ward | 1 | 24.1K | 4.31M | by Jan 1993 – Apr 2020 |
| Hardin 77 G-14-277949 | Presidio Petroleum LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 15.4K | 765K | Dec 2014 – Aug 2026 |
| Hardin 77 G-14-236323 | Presidio Petroleum LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 14K | 259K | Apr 2008 – Aug 2026 |
| Hardin -B- G-6-29985 | Eqv Operating LLC only | Carthage (Pettit, Lower Gas) | Panola | 1 | 11.5K | 753K | Feb 2006 – Aug 2026 |
| Black Stone Rebecca G-6-266154 | Harding Company only | Rebecca (James Lime) | San Augustine | 1 | 10.5K | 92.2K | Mar 2011 – Dec 2014 |
| Hardin 77 G-14-227388 | Presidio Petroleum LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 10.1K | 279K | Mar 2007 – Mar 2014 |
| Hardin "B" Gas Unit G-6-136421 | Eqv Operating LLC only | Carthage (Pettit, Lower Gas) | Panola | 1 | 7.9K | 966K | by Jan 1993 – Feb 2026 |
| Barrett, W. J. Estate G-3-194002 | Heisey Ventures, Inc. only | Hardin, South (Barrett) | Liberty | 1 | 7.64K | 353K | Dec 2002 – Mar 2007 |
| Jose Coronado G-3-262309 | Smith Production Inc. only | Hardin, SE. (Yegua 9500 Sand) | Liberty | 1 | 7.5K | 182K | Jul 2011 – Nov 2011 |
| Hardin Unit G-14-217376 | Presidio Petroleum LLC only | Mills Ranch (Atoka Granite Wash) | Wheeler | 1 | 7.47K | 987K | May 2006 – Aug 2026 |
| Cessna, J. H. G-3-281106 | Hughes Oil Operating, LLC only | Hardin (Yegua 7960) | Liberty | 1 | 7.1K | 3.03K | Aug 2019 – Aug 2026 |
| Harris-Hardin Unit G-6-280565 | XTO Energy Inc. only | Carthage (Travis Peak) | Panola | 1 | 6.53K | 137K | May 2016 – Aug 2026 |
| Harris-Hardin Unit G-6-192010 | XTO Energy Inc. only | Carthage, S. (Cotton Valley) | Panola | 1 | 6.43K | 980K | Nov 2002 – Jan 2026 |
| Harding G-13-280357 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 4.98K | 367K | Mar 2016 – Mar 2022 |
| Hardin-Simmons 53-2-8 Lov G-10-277227 | Shell Western E&P only | Sandbar (Bone Spring) | Loving | 1 | 4.34K | 10.9K | Apr 2013 – Apr 2014 |
| Hardin-Simmons Gas Unit #1 G-6-200123 | Eqv Operating LLC only | Joaquin (Travis Peak) | Shelby | 1 | 4.17K | 800K | Oct 2003 – Apr 2019 |
| Hardin 77 G-14-278107 | Presidio Petroleum LLC only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 3.87K | 102K | Dec 2014 – Jun 2020 |
| Harding, Glen G-4-154431 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.87K | 1.63M | Mar 1995 – Jul 2003 |
| Harris-Hardin Unit G-6-189562 | XTO Energy Inc. only | Carthage, S. (Cotton Valley) | Panola | 1 | 3.82K | 333K | Jun 2002 – Apr 2016 |
| Harding, Glen G-4-193585 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 3.36K | 2.82M | May 2000 – Dec 2012 |
| Hardin-Simmons Gas Unit #1 G-6-202449 | Eqv Operating LLC only | Joaquin (Travis Peak) | Shelby | 1 | 3.31K | 406K | Mar 2004 – Jul 2016 |
| Hardin G-13-118059 | GO Oil Corp. only | Dees (Atoka Conglomerate) | Jack | 1 | 3.08K | 807K | by Jan 1993 – Aug 2026 |
| Harding Fee G-10-189706 | Jetta Operating Company, Inc. only | Beall (Montoya) | Ward | 1 | 2.89K | 6.04M | May 2002 – Jul 2026 |
| Harris-Hardin Unit G-6-194485 | XTO Energy Inc. only | Carthage, S. (Cotton Valley) | Panola | 1 | 2.84K | 963K | May 2003 – Aug 2026 |
| Hardin-Simmons Gas Unit #1 G-6-227099 | Eqv Operating LLC only | Carthage (Cotton Valley) | Shelby | 1 | 2.81K | 701K | Jan 2007 – Aug 2026 |
| McAllen Fieldwide Unit G-4-142650 | Fina Oil & Chemical Company only | McAllen (Harding 6500) | Hidalgo | 1 | 2.33K | 467K | by Jan 1993 – Oct 1994 |
| Hardin 77 G-14-230588 | Presidio Petroleum LLC only | Shreikey, E. (Morrow Upper) | Hemphill | 1 | 2.09K | 480K | Jul 2007 – Aug 2026 |
| Siegmund Harding G-13-232442 | Harding Company only | Newark, East (Barnett Shale) | Parker | 1 | 1.95K | 664K | Aug 2007 – Feb 2012 |
| Hardin-Simmons Gas Unit #1 G-6-202782 | Eqv Operating LLC only | Joaquin (Travis Peak) | Shelby | 1 | 1.82K | 404K | Jan 2004 – Dec 2019 |
| Hardin G-14-96982 | Presidio Petroleum LLC only | Hemphill (Granite Wash.) | Hemphill | 1 | 1.81K | 294K | by Jan 1993 – Dec 2012 |
| Partlow, R. G. G-3-223610 | Crawford Energy Operating Co only | Hardin (Y-10) | Liberty | 1 | 1.29K | 140K | Jun 2006 – May 2008 |
| Harding Fee G-10-193482 | Jetta Operating Company, Inc. only | Beall (Montoya) | Ward | 1 | 1.26K | 1.51M | Oct 2002 – Jan 2022 |
| Harding/Lbgu G-4-138945 | Rincon Petroleum Corporation only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 1.13K | 1.42M | by Jan 1993 – Feb 2002 |
| Humphreys G-3-210893 | Heisey Ventures, Inc. only | Hardin, SW. (H. Daniel Sand) | Liberty | 1 | 1.05K | 61.9K | Aug 2005 – Dec 2010 |
| Wilson Gas Unit G-3-110065 | Hughes Oil Operating, LLC only | Hardin (7300) | Liberty | 1 | 1.03K | 211K | by Jan 1993 – Sep 2015 |
| Harding, Glen G-4-193920 | Deguello Operating LLC only | San Salvador (Consolidated Frio) | Hidalgo | 1 | 851 | 296K | Feb 2003 – Mar 2008 |
| Hardin-State G-10-64175 | Chevron U. S. A. Inc. only | Toro (Devonian) | Reeves | 1 | 677 | 1.43M | by Jan 1993 – Jun 2026 |
| Harding-Eastman G-13-210560 | WY Woodland Operating, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 655 | 120K | Jun 2005 – Jul 2012 |
| Carrizo-Harding-El Chico G-13-211028 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Parker | 1 | 611 | 1.29M | May 2005 – Mar 2017 |
| Mitchell "A" G-13-241113 | Harding Company only | Newark, East (Barnett Shale) | Parker | 1 | 582 | 214K | Aug 2008 – Dec 2013 |
| Adami-Boyles G-13-235348 | Harding Company only | Newark, East (Barnett Shale) | Parker | 1 | 517 | 84.8K | Aug 2007 – Mar 2010 |
| Hardin-Simmons Gas Unit #1 G-6-227204 | Eqv Operating LLC only | Joaquin (Travis Peak) | Shelby | 1 | 468 | 61.2K | Feb 2007 – Apr 2007 |
| Hardin-Simmons Gas Unit #1 G-6-206243 | Eqv Operating LLC only | Joaquin (Travis Peak) | Shelby | 1 | 452 | 500K | Oct 2004 – Aug 2017 |
| Roberts, J G-3-114024 | Hughes Oil Operating, LLC only | Hardin | Liberty | 1 | 439 | 110K | by Jan 1993 – Feb 2015 |