| Walker, M.P. O-3-17042 | Seneca Resources Corporation only | Mulligan, NE. (Austin Chalk) | Brazos | 1 | 549 | 9 | Jan 1993 – Sep 1993 |
| Mahoney-Shannon O-3-16142 | Texas State Oil Co. only | Kurten (Woodbine) | Brazos | 1 | 547 | 1.86K | Jan 1993 – Nov 1994 |
| Patranella Trust O-3-26239 | Centex Energy, LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 542 | 227 | Apr 2012 – Jun 2013 |
| Wilson, H.O. Unit I O-3-16599 | Patterson Petroleum LP only | Kurten (Buda) | Brazos | 1 | 523 | 688 | Jan 1993 – Mar 1997 |
| Patranella, Chas. "B" O-3-16835 | Union Pacific Resources Company only | Kurten (Buda) | Brazos | 1 | 521 | 4.98K | Jan 1993 – Sep 1993 |
| Moore, H. H. Unit G-3-208650 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 504 | 1.46M | Nov 2004 – Apr 2026 |
| Bright Sky Ranch O-3-24584 | Southwest Resources, Inc. only | Kurten (Buda) | Brazos | 2 | 502 | 60 | Aug 2004 – Jan 2005 |
| Garner-Humphries Unit 1 O-3-21838 | Ows Energy, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 439 | 2.63K | Jan 1993 – Jan 1995 |
| Cangelosi O-3-19000 | Ginger Petroleum Company, Inc. only | Kurten (Buda) | Brazos | 1 | 436 | 305 | Jan 1993 – Aug 1993 |
| Carroll Unit G-3-154433 | Texas Refining, Inc. only | Giddings (Georgetown, Gas) | Brazos | 1 | 434 | 20.3K | Feb 1996 – Oct 1999 |
| Callie O-3-17880 | Union Pacific Resources Company only | Kurten (Buda) | Brazos | 1 | 410 | 314 | Jan 1993 – Apr 1993 |
| Abshire-Selected Lands Unit G-3-228971 | Magnolia Oil & Gas Operating LLC only | Navasota River (Cretaceous Lwr.) | Brazos | 1 | 407 | 2.72M | Jul 2006 – Nov 2025 |
| Mauro, Frank L. O-3-16360 | Al-TX Operating Inc. only | Kurten (Buda) | Brazos | 1 | 398 | 23 | Jan 1993 – May 1994 |
| Loehr O-3-15688 | Geosouthern Energy Corporation only | Giddings (Austin Chalk-3) | Brazos | 1 | 364 | 21 | Jan 1993 – Jun 1995 |
| McDonald - Lori O-3-22431 | J & M Well Salvage Company only | Kurten (Buda) | Brazos | 1 | 363 | 0 | May 1994 – Sep 1994 |
| Barnes, Roy W. O-3-15807 | Barnes, Roy W. Oil Company only | Kurten (Buda) | Brazos | 2 | 358 | 50 | Jan 1993 – May 1993 |
| Kurten Woodbine Unit O-3-17353 | Cody Energy LLC only | Kurten (Buda) | Brazos | 1 | 345 | 459 | Jan 1993 – Feb 1994 |
| Conlee A O-3-27505 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 335 | 774 | Jan 2019 – Jan 2020 |
| Humphries Unit V O-3-15958 | Ows Energy, Inc. only | Kurten (Buda) | Brazos | 1 | 330 | 97 | Jan 1993 – Jan 1996 |
| Ruffino, P. Jr. "A" O-3-21793 | Anadarko E&P Onshore LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 330 | 306 | Jan 1993 – Aug 1995 |
| Bennett Unit 1 O-3-15432 | McDaniel Company, Inc., The only | Kurten (Austin Chalk) | Brazos | 1 | 319 | 140 | Jan 1993 – Oct 1994 |
| Rotello, Charles G-3-153165 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 311 | 334K | Nov 1994 – Apr 2001 |
| Green, George O-3-16317 | J & M Well Salvage Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 297 | 2 | Feb 1993 – Mar 1993 |
| Norwood O-3-22403 | Southwest Resources, Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 292 | 1.97K | Jan 1994 – Mar 1995 |
| Beulah Yeagar Unit I O-3-21081 | Torch Operating Company only | Kurten (Austin Chalk) | Brazos | 1 | 278 | 111 | Jan 1993 – May 1994 |
| Richardson "A" O-3-17477 | Al-TX Operating Inc. only | Kurten (Woodbine) | Brazos | 1 | 273 | 4 | Jan 1993 – Jul 1993 |
| Carrabba Brothers O-3-18255 | Dynamic Production, Inc. only | Stone City (Austin Chalk) | Brazos | 1 | 271 | 6 | Jan 1993 – Jun 1993 |
| Allen Farms G-3-190074 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 266 | 259K | May 2002 – Apr 2026 |
| Barnes #1 O-3-19949 | Shield Petroleum only | Kurten (Buda) | Brazos | 2 | 263 | 8 | Jan 1993 – Aug 1993 |
| Urso Unit II O-3-21817 | Cody Energy, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 257 | 829 | Jan 1993 – Jan 1994 |
| Bowman, F. Unit 1 O-3-20564 | Bexco Operating, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 256 | 4 | Jan 1993 – May 1993 |
| Rotello Unit G-3-198634 | Magnolia Oil & Gas Operating LLC only | Navasota River (Cretaceous Lwr.) | Brazos | 1 | 249 | 854K | Jul 2003 – Dec 2006 |
| Terrell G-3-127330 | Tomcat Exploration, Inc only | Clay, N.E. (Austin Chalk 11870) | Brazos | 1 | 225 | 18.1K | Jan 1993 – Oct 1995 |
| Gamble, P.K. Etal G-3-289644 | Rumble Energy LLC only | Aggieland (Woodbine) | Brazos | 1 | 225 | 2.19K | Mar 2020 – Mar 2026 |
| Huffman, L.E. O-3-11765 | Great Western Onshore Inc. only | Kurten (Woodbine) | Brazos | 1 | 204 | 1 | Jul 1993 – Jul 1993 |
| Salvaggio OL G-3-153372 | Chesapeake Operating, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 199 | 871K | Jan 1995 – May 2001 |
| Six Shooter G-3-162270 | Ogden Resources Corporation only | Millican Dome | Brazos | 1 | 184 | 369K | Feb 1997 – Sep 1999 |
| Champion Realty Corporation O-3-19561 | Williams, Clayton Energy, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 160 | 10 | Jan 1993 – Oct 1993 |
| Bryan (Austin Chalk) Pooled Unit G-3-280001 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 148 | 21.2K | Oct 2014 – Mar 2017 |
| Urso O-3-28052 | CML Exploration, LLC only | Ft. Trinidad, E. (Edwards) | Brazos | 1 | 146 | 4.46K | Oct 2022 – Feb 2025 |
| Holubec Unit 1 O-3-21697 | Ows Energy, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 140 | 688 | Jan 1993 – Dec 1994 |
| Mancuso Unit #2 G-3-155680 | Redbud E & P, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 138 | 1.51M | Jan 1995 – Apr 2026 |
| Conlee G-3-291849 | Goldsmith Operating, LLC only | Aggieland (Woodbine) | Brazos | 1 | 130 | 11.8K | Apr 2020 – Mar 2026 |
| MW-Brazos Unit O-3-22763 | MW Petroleum Corporation only | Caldwell, NE (Georgetown) | Brazos | 1 | 128 | 4.4K | Jul 1995 – Oct 1995 |
| Keller O-3-25888 | Bexco Operating, Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 118 | 0 | Mar 2012 – Dec 2012 |
| Glover G-3-192287 | Magnolia Oil & Gas Operating LLC only | Navasota River (Cretaceous Lwr.) | Brazos | 1 | 116 | 678K | Nov 2002 – Mar 2026 |
| Charli G-3-284265 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 114 | 6.72K | Sep 2017 – Dec 2019 |
| Schehin, Calvin E. G-3-96707 | Mosaic Oil LLC only | Wellborn, S. (Georgetown) | Brazos | 1 | 113 | 50.7K | Feb 1993 – Aug 2014 |
| Joyce G-3-294031 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 106 | 991 | Jan 2023 – Mar 2026 |
| Six Shooter G-3-164128 | Ogden Resources Corporation only | Millican Dome | Brazos | 1 | 100 | 289K | Aug 1997 – Sep 1999 |