| Ferguson Prison Unit G-3-266320 | | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 284K | 800K | Jul 2011 – Aug 2014 |
| Ferguson Prison Unit G-6-278379 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 142K | 937K | Sep 2014 – Apr 2026 |
| Ferguson Prison Unit G-3-265289 | Sem Operating Company LLC only | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 126K | 494K | Mar 2011 – Aug 2014 |
| Ferguson Prison Unit G-3-271685 | | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 120K | 397K | Jul 2011 – Aug 2014 |
| Ferguson Prison Unit G-3-271371 | Sem Operating Company LLC only | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 112K | 811K | Apr 2012 – Aug 2014 |
| Bales Gas Unit G-4-166723 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 97.4K | 4.99M | Jun 1997 – Apr 2026 |
| Ferguson Prison Unit G-6-277816 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 65.8K | 305K | Sep 2014 – Apr 2026 |
| McAllen Fieldwide Unit G-4-162849 | Totalfinaelf E&P USA Inc only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 58.4K | 3.93M | Apr 1997 – Dec 2002 |
| Ferguson Prison Unit G-6-280791 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 54.3K | 224K | Mar 2015 – Mar 2021 |
| Bales Gas Unit G-4-171559 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 53.6K | 1.27M | Mar 1998 – Jul 2005 |
| Ferguson Prison Unit G-3-272052 | Sem Operating Company LLC only | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 47.6K | 1.16M | Jan 2012 – Aug 2014 |
| Bales Gas Unit G-4-251874 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 47.3K | 4.98M | Aug 2009 – Mar 2026 |
| Ferguson, Belle Gas Unit G-4-161413 | Shell Western E&P only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 39.3K | 4.4M | Oct 1996 – Aug 2005 |
| Ferguson Prison Unit G-6-278713 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 31.6K | 147K | Sep 2014 – Apr 2026 |
| Ferguson Prison Unit G-6-277688 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 30K | 169K | Sep 2014 – Feb 2021 |
| Ferguson Prison Unit G-6-278871 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 28.1K | 566K | Sep 2014 – Apr 2026 |
| McAllen Fieldwide Unit G-4-173095 | Total E&P USA, Inc. only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 27.9K | 2.76M | Nov 1998 – Feb 2005 |
| Ferguson Prison Unit G-3-272058 | Sem Operating Company LLC only | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 25.4K | 300K | Sep 2012 – Aug 2014 |
| Ferguson Prison Unit G-3-277051 | | Fort Trinidad (Glen Rose, Upper) | Madison | 1 | 24.8K | 497K | Sep 2011 – Aug 2014 |
| Ferguson, D. G-4-192873 | Merit Energy Company only | Alvarado (Vicksburg) | Starr | 1 | 22.5K | 1.87M | Jan 2003 – Apr 2026 |
| Belle Ferguson Gas Unit G-4-147404 | Totalfinaelf E&P USA Inc only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 18.1K | 1.34M | Dec 1993 – May 2002 |
| Belle Ferguson G.U. G-4-174688 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 15.9K | 2M | Aug 1999 – Apr 2026 |
| McAllen Fieldwide Unit G-4-208836 | Merit Energy Company only | Belle Ferguson (Bond) | Hidalgo | 1 | 15.7K | 859K | Feb 2005 – Apr 2010 |
| Ferguson Gas Unit G-5-92883 | Diversified Production LLC only | Personville, N (CV Consolidated) | Limestone | 1 | 15.6K | 1.35M | Jan 1993 – Apr 2026 |
| Ferguson, Belle Gas Unit G-4-137163 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 14.9K | 1.49M | Jan 1993 – Oct 2016 |
| Ferguson, D. G-4-194168 | Merit Energy Company only | Alvarado (Vicksburg) | Starr | 1 | 12K | 1.01M | Mar 2003 – Apr 2026 |
| Ferguson, Belle Gas Unit G-4-148701 | Merit Energy Company only | Belle Ferguson (Bond) | Hidalgo | 1 | 9.08K | 296K | Mar 1994 – Oct 1996 |
| Ferguson D G-10-149364 | Burk Royalty Co., Ltd. only | Spraberry (Trend Area) | Sterling | 1 | 7.43K | 749K | Apr 1994 – Nov 2020 |
| Ferguson, Belle Gas Unit G-4-136573 | Merit Energy Company only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 7.12K | 608K | Jan 1993 – May 1999 |
| Ferguson, D. G-4-197725 | Merit Energy Company only | Alvarado (Vicksburg) | Starr | 1 | 6.76K | 326K | Oct 2003 – Jul 2024 |
| Ferguson G-13-199249 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 6.66K | 853K | Mar 2004 – Apr 2026 |
| Ferguson D G-10-150227 | Burk Royalty Co., Ltd. only | Spraberry (Trend Area) | Sterling | 1 | 6.45K | 666K | Jul 1994 – Apr 2026 |
| Ferguson Prison Unit G-6-277818 | Trailblazer Energy Resources,llc only | Eastham State Farm (Glenrose) | Madison | 1 | 6.07K | 120K | Sep 2014 – Feb 2020 |
| Ferguson G-13-199242 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 5.5K | 269K | Mar 2004 – Apr 2026 |
| Ferguson Brothers "34" G-10-143239 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 5.16K | 364K | Jan 1993 – Mar 2026 |
| Ferguson Brothers "30" G-10-129157 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 4.86K | 309K | Jan 1993 – Mar 2026 |
| Ferguson, J.R. Estate G-5-135486 | Seagull Energy E&P Inc. only | Winkler, S.(cotton Valley Lime) | Freestone | 1 | 4.46K | 289K | Jan 1993 – Sep 1999 |
| Ferguson Brothers "34" G-10-136445 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 4.31K | 423K | Jan 1993 – Mar 2026 |
| Ferguson C G-10-138512 | Burk Royalty Co., Ltd. only | Spraberry (Trend Area) | Sterling | 1 | 4.29K | 254K | Jan 1993 – Apr 2026 |
| Ferguson "B" G-10-128071 | Burk Royalty Co., Ltd. only | Spraberry (Trend Area) | Sterling | 1 | 4.15K | 117K | Jan 1993 – Mar 2023 |
| Ferguson "B" G-10-126952 | Stanolind Production LLC only | Sugg Ranch (Canyon Dist 08) | Sterling | 1 | 3.92K | 304K | Jan 1993 – Feb 2005 |
| Ferguson Brothers "34" G-10-143238 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 3.79K | 366K | Jan 1993 – Mar 2026 |
| Ferguson G-13-199241 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 3.79K | 277K | Apr 2004 – Apr 2026 |
| Ferguson Gas Unit G-8-122913 | Stephens & Johnson Operating Co. only | Mingus (Big Saline) | Palo Pinto | 1 | 3.73K | 266K | Jan 1993 – Apr 2026 |
| Ferguson Bros. -34- G-10-145648 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 3.53K | 293K | Jun 1993 – Mar 2026 |
| Ferguson Brothers "34" G-10-141034 | Independence Resources Mgmt, LLC only | Sugg Ranch (Canyon Dist 08) | Sterling | 1 | 3.43K | 208K | Jan 1993 – Jun 2007 |
| Ferguson Bros -34- G-10-145017 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 3.27K | 456K | Apr 1993 – Mar 2026 |
| Ferguson Bros -34- G-10-145019 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 3.25K | 357K | Mar 1993 – Mar 2026 |
| Ferguson B G-10-131292 | EQT Production Texas, LLC only | Sugg Ranch (Canyon Dist 08) | Sterling | 1 | 3.24K | 258K | Jan 1993 – Mar 2005 |
| Ferguson Bros. -34- G-10-145018 | P1 Energy, LLC only | Spraberry (Trend Area) | Sterling | 1 | 3.23K | 284K | Mar 1993 – Mar 2026 |