| Lanicek OL G-3-149094 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 570K | 3.24M | Feb 1994 – Feb 2001 |
| Milam Hall Unit G-3-292944 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 442K | 4.67M | Jul 2021 – Mar 2026 |
| Walker, M. P. G-3-148090 | Verdun Oil & Gas LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 401K | 3.45M | Dec 1993 – Feb 2026 |
| Walker, M. P. G-3-149172 | Verdun Oil & Gas LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 387K | 2.82M | Mar 1994 – Apr 2026 |
| Union Hill G-3-286732 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 376K | 5.56M | Feb 2019 – Apr 2026 |
| Burns Creek G-3-287417 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 348K | 11M | Mar 2019 – Apr 2026 |
| Strange Unit G-3-161535 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 305K | 4.43M | Sep 1996 – Oct 2020 |
| Milam Hall Unit G-3-293225 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 305K | 1.82M | Dec 2021 – Mar 2026 |
| Baca G-3-146161 | Redbud E & P, Inc. only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 303K | 2.71M | Mar 1993 – Apr 2026 |
| Petras-Amarado G-3-145631 | Redbud E & P, Inc. only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 300K | 2.5M | May 1993 – Apr 2026 |
| Big Bend G-3-289983 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 287K | 5.49M | Nov 2020 – Apr 2026 |
| Winkelmann G-3-284707 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 273K | 3.02M | Jun 2017 – Mar 2026 |
| Valentine G-3-294746 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 266K | 2.76M | Oct 2022 – Mar 2026 |
| Jr. Allen OL G-3-149216 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 263K | 1.61M | Feb 1994 – Feb 2001 |
| Terry-Terry Unit G-3-143967 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 263K | 1.76M | Jan 1993 – Feb 2008 |
| Mahlmann-Walther Unit G-3-141715 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 252K | 2.3M | Jan 1993 – Aug 1999 |
| Baggett G-3-288419 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 249K | 6.71M | Jul 2018 – Mar 2026 |
| Kolbe G-3-154796 | Geosouthern Energy Corporation only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 248K | 2.86M | May 1995 – Apr 2026 |
| Pocahontas Unit G-3-161527 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 245K | 929K | Nov 1996 – Aug 1999 |
| Cedar Creek "B" Amarado Unit G-3-146831 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 243K | 2.33M | Jul 1993 – Aug 2009 |
| Waltman G-3-154083 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 239K | 2.34M | Mar 1995 – Feb 2017 |
| Lcra/Coa Unit 2 G-3-154709 | Geosouthern Energy Corporation only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 238K | 6.16M | Apr 1995 – Aug 2015 |
| Banks Ranch Unit G-3-288648 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 238K | 2.96M | Nov 2019 – Apr 2026 |
| Valentine G-3-294745 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 237K | 3.51M | Oct 2022 – Mar 2026 |
| Cedar Creek "C" Amarado Unit G-3-145869 | Redbud E & P, Inc. only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 236K | 2.76M | May 1993 – Apr 2026 |
| Franks OL G-3-153549 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 233K | 1.63M | Dec 1994 – Jan 2001 |
| Thompson-Marsh Unit G-3-146625 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 232K | 2.22M | Aug 1993 – Aug 2020 |
| Boeker Unit G-3-286491 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 232K | 5.09M | Jan 2019 – Apr 2026 |
| Patricia-O.L. Unit G-3-147069 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 229K | 2.86M | Oct 1993 – Sep 2010 |
| Boeker-Union Hill AW-D G-3-294660 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 226K | 4.13M | Dec 2022 – Apr 2026 |
| Dugger-Smith Unit G-3-149897 | Anadarko E&P Company LP only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 224K | 2.38M | May 1994 – Nov 2002 |
| Terry, H. L. Unit G-3-146621 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 215K | 2.05M | Jul 1993 – Aug 1999 |
| Hielscher G-3-289212 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 213K | 5.23M | Jan 2020 – Apr 2026 |
| Rager G-3-288282 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 208K | 1.94M | Jul 2019 – Mar 2026 |
| Fincher G-3-288519 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 203K | 1.96M | Oct 2018 – Mar 2026 |
| Campbell-Lutheran Unit G-3-148718 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 201K | 2.57M | Jan 1994 – Sep 2020 |
| Lessard G-3-287220 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 197K | 5.4M | Apr 2019 – Apr 2026 |
| Philip DL G-3-151747 | Evolution Operating Co., Inc. only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 196K | 4.98M | Sep 1994 – Mar 2015 |
| Giles G-3-156485 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 196K | 613K | Sep 1995 – Mar 2000 |
| McCullough-Olden Unit G-3-146491 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 189K | 1.72M | May 1993 – Nov 2024 |
| Allen G-3-145818 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 188K | 1.3M | May 1993 – Aug 1999 |
| Franus Unit G-3-156437 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 187K | 2.41M | Sep 1995 – Feb 2000 |
| McCullough-McCullough 'A' G-3-145083 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 187K | 1.49M | Jan 1993 – Feb 2000 |
| Onyx Unit G-3-160343 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 186K | 3.24M | May 1996 – Jul 2025 |
| Geosouthern-Min Brown G-3-144827 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 186K | 2.46M | Mar 1993 – Aug 2010 |
| Lcra/Coa Unit 4 G-3-157282 | Geosouthern Energy Corporation only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 182K | 4.23M | Dec 1995 – Apr 2026 |
| McCullough-McCullough Unit G-3-143450 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 181K | 1.53M | Jan 1993 – Apr 2010 |
| Boeker-Union Hill AW-A G-3-294644 | Geosouthern Operating II, LLC only | Giddings (Austin Chalk, Gas) | Washington | 1 | 181K | 2.39M | Dec 2022 – Apr 2026 |
| Cannon Unit G-3-155696 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Grimes | 1 | 179K | 1.28M | Jun 1995 – Aug 1999 |
| Barrera G-3-146859 | Rosewood Resources, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 179K | 1.53M | Aug 1993 – Feb 2001 |