| Provident Minerals G.U. G-2-198439 | Hilcorp Energy Company only | Provident City (Wilcox 7) | Lavaca | 1 | 210K | 17.5M | Jun 2003 – Jul 2025 |
| Gouger Gas Unit No. 5 O/A G-1-439 | Pearl, Bill H. Productions, Inc. only | Roos (Wilcox 7500) | McMullen | 1 | 49.6K | 814K | by Jan 1993 – Aug 2026 |
| Langham, W. W. "B" G-3-143069 | Famcor Oil, Inc. only | Urbana (Wilcox 7250) | San Jacinto | 1 | 46.9K | 1.75M | by Jan 1993 – Feb 2001 |
| Royal et Al G-3-258191 | Magnum Producing, LP only | Giddings (Wilcox 7300) | Fayette | 1 | 45.6K | 686K | May 2010 – Sep 2013 |
| Gutierrez Heirs 37 G-4-164759 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 43.8K | 9.21M | Sep 1997 – Nov 2025 |
| Killam Mineral Fee "601" G-4-148849 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 37.7K | 1.88M | Mar 1994 – Jul 2008 |
| Catto Heirs Unit #2 G-4-143155 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 36.5K | 2.46M | by Jan 1993 – Dec 2022 |
| Gutierrez Heirs G-4-113810 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 29.1K | 6.63M | by Jan 1993 – Aug 2026 |
| K & H Fee "2042" G-4-107363 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 27.1K | 893K | by Jan 1993 – Mar 2000 |
| Spielhagen, B. U. G-2-186468 | Paleo Oil Company LLC only | Burnell (Wilcox 7800) | Karnes | 1 | 26.2K | 1.25M | Oct 2001 – Aug 2010 |
| Killam Mineral Fee "601" G-4-152575 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 21.5K | 3.45M | Dec 1994 – Aug 2026 |
| Chapman G-3-193826 | Strand Energy, L.C. only | Howth (Wilcox 7580) | Waller | 1 | 20.3K | 542K | Mar 2003 – Mar 2009 |
| K&H Fee "574" G-4-160856 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 20.2K | 2.53M | Nov 1996 – Jan 2016 |
| Blk. 32 G-3-170434 | Lone Oak Energy Inc only | Sublime (Wilcox 7770) | Colorado | 1 | 19.3K | 1.04M | Oct 1998 – May 2008 |
| Block 75 Unit G-2-182271 | Sage Energy Company only | Clayton (Wilcox 7720) | Live Oak | 1 | 19K | 1.21M | Jan 2001 – Jul 2008 |
| Wtu Robinson G-2-209990 | Britanco, L.L.C. only | Tuleta, West (Slick-Wilcox 7900) | Bee | 1 | 18.5K | 969K | Apr 2005 – Aug 2026 |
| Scott Foundation G-1-202556 | Proline Energy Resources Inc only | Campana, South (Wilcox 7700) | McMullen | 1 | 18.1K | 1.73M | Jun 2004 – Jun 2026 |
| Scott Foundation G-1-193524 | Proline Energy Resources Inc only | Campana, South (Wilcox 7,900) | McMullen | 1 | 18K | 1.5M | Jan 2003 – Oct 2008 |
| Rice Institute G-3-188011 | Petra Oleum Corp. only | Hillister, East (Wilcox 7300) | Tyler | 1 | 17.9K | 105K | Jan 2002 – May 2006 |
| Bernice Karl et al GU G-2-171009 | Peoples Energy Prod.-TX, L.P. only | Hope (Wilcox 7700) | Lavaca | 1 | 16.8K | 777K | May 1998 – Apr 2004 |
| Old Zapata Deep Gas Unit G-4-140947 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 16.6K | 3.98M | by Jan 1993 – Aug 2026 |
| Frost National Bank G-4-138439 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 16.3K | 2.7M | by Jan 1993 – Aug 2026 |
| Frost National Bank G-4-123572 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 16.1K | 3.01M | by Jan 1993 – Aug 2026 |
| B. U.-Spielhagan G-2-75460 | Legend Natural Gas II, LP only | Burnell (Wilcox 7300) | Karnes | 1 | 15.1K | 1.01M | by Jan 1993 – Aug 1997 |
| Frost National Bank G-4-125282 | Conocophillips Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 14.2K | 1.1M | by Jan 1993 – Sep 2002 |
| K & H Fee "1620" G-4-145435 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 13.5K | 1.86M | Apr 1993 – Dec 2019 |
| Frost National Bank G-4-139395 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 13.4K | 1.94M | by Jan 1993 – Aug 2026 |
| Ryan, Nolan G-2-216801 | Aurora Resources Corporation only | Clayton (Wilcox 7250) | Live Oak | 1 | 13.3K | 555K | Oct 2005 – Apr 2010 |
| Old Zapata Deep GU G-4-172281 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 12.7K | 1.48M | Feb 1999 – Aug 2026 |
| Frost National Bank G-4-143981 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 12.4K | 2.76M | by Jan 1993 – Jan 2012 |
| Gouger Gas Unit No. 4 O/A G-1-40834 | Proline Energy Resources Inc only | Roos (Wilcox 7500) | McMullen | 1 | 12.3K | 1.37M | Feb 1994 – Aug 2025 |
| Sibley Estate G-2-269091 | Fowler Oil & Gas LLC only | Esperanza (Wilcox 7800) | Lavaca | 1 | 11.9K | 159K | Apr 2012 – Jan 2014 |
| Fife G-3-193968 | Strand Energy, L.C. only | Howth (Wilcox 7580) | Waller | 1 | 11.8K | 301K | Mar 2003 – Apr 2004 |
| Block 76 Unit G-2-130278 | Hedrick Production Inc. only | Clayton (Wilcox 7360) | Live Oak | 1 | 11K | 545K | by Jan 1993 – Jun 2004 |
| Ryan, Nolan G-2-223792 | Aurora Resources Corporation only | Clayton (Wilcox 7370-Herring SD) | Live Oak | 1 | 10.1K | 575K | Aug 2006 – Sep 2011 |
| Powell G-3-220190 | Neches Transport Inc. only | Hillister, East (Wilcox 7300) | Tyler | 1 | 9.71K | 45.4K | Oct 2006 – Oct 2010 |
| Wtu Hall G-2-169299 | Britanco, L.L.C. only | Tuleta, West (Slick-Wilcox 7500) | Bee | 1 | 9.64K | 2.23M | May 1998 – Aug 2026 |
| K & H Fee "2042" G-4-149325 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 9.35K | 225K | Mar 1994 – Mar 1996 |
| Catto Heirs Unit #2 G-4-142653 | Killam Oil Co., Ltd. only | Villegas (Middle Wilcox 7950) | Webb | 1 | 9.27K | 607K | by Jan 1993 – Jul 2001 |
| Gutierrez Heirs 37 G-4-183483 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 9.23K | 1.82M | Jun 2001 – Aug 2026 |
| Nix 70 G-14-278471 | Revolution Operating Company,llc only | Lipscomb, S.E. (Cleveland) | Hemphill | 1 | 8.87K | 97.7K | Oct 2013 – May 2018 |
| Rhode Ranch G-1-278622 | Hurd Enterprises, Ltd. only | Rhode Ranch, East (Wilcox 7600) | McMullen | 1 | 8.41K | 741K | Oct 2014 – Oct 2020 |
| Aronstein G-2-147030 | Araxas Exploration, Inc. only | Cook, South (Wilcox 7510) | De Witt | 1 | 8.18K | 49.1K | Sep 1993 – Jan 1995 |
| Frost National Bank G-4-141566 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 7.69K | 1.48M | by Jan 1993 – Aug 2026 |
| Villarreal-Zapata Gas Unit G-4-142649 | Varas Energy Operating Company, only | Urebeno, South (Wilcox 7000) | Zapata | 1 | 7.63K | 3.76M | by Jan 1993 – Aug 2026 |
| Block 76 Unit G-2-133397 | Hedrick Production Inc. only | Clayton (Wilcox 7360) | Live Oak | 1 | 7.52K | 127K | by Jan 1993 – Aug 2026 |
| McClelland, J. W. G-2-154210 | Samson Lone Star LP only | Limes (Wilcox 7900) | Live Oak | 1 | 7.42K | 633K | Dec 1994 – Dec 1996 |
| Julia Mott Gas Unit No. 3 G-2-280535 | Foundation Energy Management LLC only | Yoakum (Wilcox 7450) | De Witt | 1 | 7.2K | 519K | Sep 2013 – Aug 2026 |
| Frost National Bank G-4-140930 | Hilcorp Energy Company only | Villegas (Middle Wilcox 7950) | Webb | 1 | 6.95K | 1.91M | by Jan 1993 – Aug 2026 |
| Block 85 Unit G-2-139134 | Hedrick Production Inc. only | Clayton (Wilcox 7360) | Live Oak | 1 | 6.93K | 217K | by Jan 1993 – Aug 2026 |