| Bryan (Austin Chalk) Pooled Unit O-3-21739 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 15 | 1.2M | 4.46M | by Jan 1993 – Sep 2024 |
| Haltom-Fazzino Unit O-3-22850 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 544K | 823K | Aug 1995 – Jul 2026 |
| Dansby Trust O-3-22481 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 527K | 3.28M | Jun 1994 – Aug 2026 |
| Akin-Foxfire Unit O-3-22405 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk-3) | Brazos | 1 | 526K | 3.6M | Apr 1994 – Jun 2013 |
| Angonia-Luza Unit O-3-21821 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 3 | 521K | 803K | by Jan 1993 – Jul 2026 |
| Patranella-Scarpinato Unit O-3-22855 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 483K | 734K | Oct 1995 – Jul 2026 |
| Scarpinato-Ayers Unit O-3-22492 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 482K | 798K | Jun 1994 – Jul 2026 |
| Patranella-Varisco Estate Unit O-3-22234 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 472K | 548K | Nov 1993 – Jul 2026 |
| Riverside Campus O-3-21158 | E2 Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 6 | 467K | 2.27M | by Jan 1993 – Jan 2025 |
| Kriel-Enloe Unit O-3-22304 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 467K | 492K | Feb 1994 – Jul 2026 |
| McLaughlin-Lake Unit O-3-22119 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 450K | 465K | Jun 1993 – Jul 2026 |
| Beulah Goen Unit O-3-21720 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 447K | 3.17M | by Jan 1993 – Aug 2026 |
| C. F. Goen Unit O-3-21753 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 417K | 3.18M | by Jan 1993 – Aug 2026 |
| Birchridge-Allen Unit G-3-149117 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 412K | 4.06M | Mar 1994 – Feb 2020 |
| Angonia-Fazzino Unit O-3-22634 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 410K | 374K | Oct 1994 – Jul 2026 |
| Luedecke-Davros Unit O-3-22020 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 410K | 2.71M | May 1993 – Aug 2026 |
| Anderson O-3-21569 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk-3) | Brazos | 3 | 409K | 1.67M | by Jan 1993 – Sep 2013 |
| Polar Bear O-3-24132 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 392K | 505K | May 2001 – Jul 2026 |
| Kutzschbach-Langford Unit O-3-22430 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 389K | 237K | May 1994 – Jul 2026 |
| Porterfield-Gifford Hill Unit O-3-22211 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 378K | 444K | Nov 1993 – Jul 2026 |
| Anderson O-3-27913 | Apache Corporation only | Giddings (Austin Chalk-3) | Brazos | 1 | 364K | 2.4M | May 2021 – Oct 2022 |
| Marcella Goen Unit O-3-21873 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 362K | 3.14M | by Jan 1993 – Aug 2026 |
| Galindo Unit O-3-22427 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 362K | 1.53M | Jun 1994 – Apr 2020 |
| Fazzino-Lake Unit O-3-22178 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 348K | 309K | Sep 1993 – Jul 2026 |
| Brazos Coal Ltd. - Terry "C"unit O-3-22074 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 334K | 1.76M | Feb 1993 – Jun 2012 |
| Allen-Dansby Unit O-3-22225 | Anadarko E&P Company LP only | Giddings (Austin Chalk-3) | Brazos | 1 | 327K | 1.4M | Nov 1993 – Aug 2006 |
| Orca Unit O-3-24371 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 307K | 453K | May 2003 – Jul 2026 |
| Sby Partnership O-3-21965 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 296K | 220K | Mar 1993 – Jul 2026 |
| Patranella-Wilson Unit O-3-24332 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 289K | 407K | Sep 2002 – Jul 2026 |
| Zubik-Smith Unit O-3-21939 | Chesapeake Operating, L.L.C. only | Giddings (Austin Chalk-3) | Brazos | 1 | 278K | 485K | Feb 1993 – Feb 2020 |
| Brazos Bottoms O-3-22490 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 273K | 283K | Jul 1994 – Jul 2026 |
| McCallum-Smith Unit 1 O-3-22754 | CML Exploration, LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 271K | 350K | May 1995 – Aug 2026 |
| Newberry O-3-22877 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 270K | 476K | Aug 1995 – Jul 2026 |
| Adkins Unit O-3-22627 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk-3) | Brazos | 1 | 266K | 1.72M | Dec 1994 – Aug 2012 |
| Bryan Cooling Lake Unit O-3-22279 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 263K | 402K | Dec 1993 – Jul 2026 |
| Rocket Unit O-3-23099 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 262K | 305K | Oct 1996 – Jul 2026 |
| Dunlap-Bryan Unit G-3-148172 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 256K | 4.39M | Jan 1994 – Jul 2024 |
| McCullough-McCullough 'B' Unit G-3-145291 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 255K | 3.69M | Apr 1993 – Aug 2026 |
| Henry L. Allen Unit O-3-22231 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk-3) | Brazos | 1 | 248K | 1.11M | Oct 1993 – May 2008 |
| Tramble-Salvato Unit O-3-22331 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 243K | 316K | Mar 1994 – Jun 2026 |
| Newsom Unit O-3-22111 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 227K | 816K | Jun 1993 – Oct 2022 |
| Fazzino-Penicka Unit O-3-21279 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 222K | 975K | by Jan 1993 – Jul 2026 |
| J.M. Atkins Unit O-3-22146 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk-3) | Brazos | 2 | 219K | 1.99M | Aug 1993 – Oct 2005 |
| Kinman Unit O-3-22348 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 214K | 1.09M | Nov 1994 – Aug 2026 |
| Nantucket O-3-22342 | Southwest Resources, Inc. only | Giddings (Austin Chalk-3) | Brazos | 2 | 211K | 1.39M | Oct 1993 – Feb 2006 |
| Brazos Farm Ltd.-Sausage Unit O-3-21288 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 209K | 523K | by Jan 1993 – Jul 2026 |
| Jones-Scarpinato Unit O-3-22368 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 203K | 173K | Mar 1994 – Jul 2026 |
| Brazos Farm Ltd Unit O-3-21327 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 202K | 552K | by Jan 1993 – Jul 2026 |
| Felix K. Unit O-3-22188 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 199K | 1.18M | Sep 1993 – Sep 2020 |
| Britten-Siegert Unit O-3-21606 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 2 | 199K | 422K | by Jan 1993 – May 2024 |