| Harrison, W. A. G-3-196706 | Horizon Prod. and Operating, LLC only | Smithers Lake, E. (Yegua) | Fort Bend | 1 | 926K | 13.7M | May 2003 – Aug 2024 |
| Colony G-3-166126 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 525K | 16.9M | Oct 1997 – Apr 2026 |
| George Ranch G-3-182228 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 521K | 7.71M | Nov 2000 – Apr 2025 |
| George Ranch G-3-182762 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 467K | 10.9M | Mar 2001 – Apr 2025 |
| Gallia G-3-175901 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 420K | 23.4M | Sep 1999 – Apr 2026 |
| George Ranch G-3-188303 | Bass Enterprises Production Co. only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 420K | 2.96M | Apr 2002 – Aug 2004 |
| Gallia G-3-149672 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 413K | 23M | May 1994 – Apr 2026 |
| Aylor "A" G-3-118957 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 326K | 38.1M | Jan 1993 – Apr 2026 |
| George Ranch G-3-192297 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 323K | 6.03M | Dec 2002 – Apr 2025 |
| George Ranch G-3-189850 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 302K | 11M | Jul 2002 – Apr 2025 |
| Colony G-3-161099 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 294K | 10.4M | Jul 1996 – Oct 2010 |
| George Ranch G-3-187553 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua, NM-1) | Fort Bend | 1 | 254K | 3.87M | Dec 2001 – Apr 2025 |
| George Ranch G-3-192678 | Bopco, L.P. only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 242K | 2.26M | Jan 2003 – Jul 2009 |
| Dusek G-3-146060 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 210K | 11.5M | Jun 1993 – Apr 2026 |
| George Ranch G-3-185588 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua, AU-1) | Fort Bend | 1 | 200K | 2.17M | Sep 2001 – Apr 2025 |
| El Ferrocarril Ltd G-3-190143 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 175K | 6.11M | Jul 2002 – Apr 2026 |
| George Ranch AU-1 Gas Unit G-3-210201 | Bopco, L.P. only | Smithers Lake (Yegua, AU-1) | Fort Bend | 1 | 166K | 1.38M | Jun 2005 – Dec 2009 |
| Wingate G-3-157039 | Hilcorp Energy Company only | Cooley (Wilcox, Upper) | Fort Bend | 1 | 158K | 9.43M | Oct 1995 – Apr 2026 |
| Vallet G-3-283527 | Ballard Exploration Company,inc. only | Needville, NE (10,320 Cook MTN) | Fort Bend | 1 | 145K | 1.71M | Jan 2017 – Jun 2021 |
| Colony G-3-166569 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 138K | 6.43M | Oct 1997 – Apr 2026 |
| Wingate G-3-160799 | Hilcorp Energy Company only | Cooley (Wilcox, Upper) | Fort Bend | 1 | 133K | 6.96M | Aug 1996 – Apr 2026 |
| Sanders, L. J. G-3-123821 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 125K | 18.3M | Jan 1993 – Apr 2026 |
| American Breco G-3-170429 | Gaither Petroleum Corporation only | Rosenberg, North (Upper Wilcox) | Fort Bend | 1 | 122K | 12.6M | Jul 1998 – Apr 2016 |
| Gallia G-3-157503 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 121K | 6.03M | Jan 1996 – Jul 2012 |
| Aylor -A- G-3-126338 | Hilcorp Energy Company only | Cooley (Wilcox, Upper) | Fort Bend | 1 | 120K | 11.3M | Jan 1993 – Apr 2026 |
| Cosmonaut G-3-182253 | Cobra Oil & Gas Corporation only | Cosmonaut (Lower Vicksburg) | Fort Bend | 1 | 118K | 514K | Nov 2000 – May 2002 |
| McMillian G-3-211387 | Hilcorp Energy Company only | Fulshear, S. (Cons.) | Fort Bend | 1 | 117K | 4.21M | Mar 2005 – Apr 2026 |
| Colony G-3-203324 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 115K | 4.98M | Jun 2004 – Apr 2026 |
| Kasparek et Al G-3-208424 | Oblaen Resources LLC only | Needville, NE (10,320 Cook MTN) | Fort Bend | 1 | 112K | 2.33M | Jan 2005 – Oct 2017 |
| Dusek G-3-157202 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 111K | 7M | Dec 1995 – Apr 2026 |
| Dusek G-3-185821 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 107K | 9.64M | Aug 2001 – Apr 2026 |
| Stavinoha, Dennis et Al G-3-179208 | Eagleridge Operating, LLC only | Needville, North (Yegua EY-2) | Fort Bend | 1 | 105K | 4.37M | Aug 2000 – Nov 2013 |
| El Ferrocarril Ltd G-3-198084 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 99.2K | 4.24M | Aug 2003 – Jan 2013 |
| Kelly, Joe et Al G-3-180004 | Devon Energy Production Co, L.P. only | Needville, North (Yegua EY-2) | Fort Bend | 1 | 95.7K | 2.89M | Oct 2000 – Jun 2004 |
| El Ferrocarril Ltd G-3-167434 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 93.9K | 2.97M | Jan 1998 – Jan 2022 |
| Colony G-3-203321 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 93.2K | 4.57M | Jun 2004 – Apr 2026 |
| Wingate G-3-169322 | Hilcorp Energy Company only | Cooley (Wilcox, Upper) | Fort Bend | 1 | 89.1K | 6.79M | Dec 1997 – Apr 2026 |
| George Ranch G-3-210150 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua, AU-1) | Fort Bend | 1 | 81.3K | 1.23M | May 2005 – Apr 2025 |
| McMillian G-3-211909 | Hilcorp Energy Company only | Fulshear, S. (Cons.) | Fort Bend | 1 | 81.3K | 4.65M | Dec 2004 – Mar 2026 |
| George Ranch G-3-199303 | Roy Jackson Energy Operating, LL only | Smithers Lake (Yegua EY-1) | Fort Bend | 1 | 81.3K | 1.24M | Jan 2004 – Apr 2025 |
| Benton Trust G-3-169073 | Gaither Petroleum Corporation only | Rosenberg, North (Upper Wilcox) | Fort Bend | 1 | 80.6K | 5.48M | Feb 1998 – Oct 2014 |
| El Ferrocarril Ltd. G-3-155701 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 74.4K | 3.68M | Aug 1995 – Mar 2023 |
| Colony G-3-188425 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 74.4K | 2.96M | Apr 2002 – Apr 2026 |
| Gallia G-3-262674 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 70.4K | 3.68M | May 2011 – Apr 2026 |
| Krenek, Frank G-3-195280 | Hamman Oil & Refining Company only | Cooley (Meek Sand) | Fort Bend | 1 | 70.3K | 2.34M | May 2003 – Apr 2008 |
| Townsite G-3-132837 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 69.8K | 8.67M | Jan 1993 – Apr 2026 |
| Tigner Gas Unit G-3-173449 | Cobra Oil & Gas Corporation only | Tigner (Vicksburg) | Fort Bend | 1 | 69.6K | 2.81M | Apr 1999 – Apr 2009 |
| Imparato G-3-201259 | Hilcorp Energy Company only | Fulshear, S. (Cons.) | Fort Bend | 1 | 69.5K | 3.02M | Mar 2004 – Apr 2026 |
| Dusek G-3-203777 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 68.6K | 4.97M | Jul 2004 – Apr 2026 |
| Kristynik G-3-198805 | Hilcorp Energy Company only | Cooley (Meek Sand) | Fort Bend | 1 | 67.2K | 2.39M | Sep 2003 – Apr 2026 |