| J Smith Unit A O-2-10166 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 10 | 4.15M | 12.3M | Nov 2012 – Apr 2026 |
| Tom-Smith Unit A O-1-17689 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 6 | 1.43M | 1.75M | Oct 2014 – Apr 2026 |
| Wilhelm Smith Unit B O-2-10530 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Atascosa | 6 | 1.38M | 1.57M | May 2013 – Apr 2026 |
| Tom-Smith Unit B O-1-18809 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 7 | 1.23M | 1.06M | May 2021 – Apr 2026 |
| West Goldsmith Unit O-10-20888 | Aghorn Operating, Inc. only | Goldsmith, W. (Clear Fork, Up.) | Ector | 156 | 1.17M | 2.56M | Jan 1993 – Feb 2026 |
| Wilhelm-Smith Unit A O-1-16354 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 4 | 853K | 948K | Dec 2012 – Apr 2026 |
| Smith Unit O-2-10717 | Murphy Expl. & Prod. Co. - USA only | Eagleville (Eagle Ford-2) | Karnes | 4 | 728K | 884K | Feb 2014 – Apr 2026 |
| Tom-Smith Unit C O-1-20500 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 5 | 661K | 527K | Jan 2022 – Apr 2026 |
| Sealy & Smith Unit O-10-16075 | Basin Oil & Gas Operating, LLC only | Halley (Clear Fork) | Winkler | 10 | 599K | 2.35M | Jan 1993 – Apr 2026 |
| E. E. Smith Unit 2 O-1-13083 | Zarvona Energy LLC only | First Shot (Austin Chalk) | Gonzales | 2 | 500K | 268K | Jan 1993 – Apr 2026 |
| Smith Unit O-1-16024 | Gulftex Energy, LLC only | Eagleville (Eagle Ford-1) | Gonzales | 2 | 458K | 237K | Oct 2011 – Mar 2026 |
| Branch-Smith Unit No. 1 O-3-15895 | Senora Resources, Inc. only | Giddings (Austin Chalk-3) | Lee | 8 | 292K | 2.84M | Jan 1993 – Dec 2023 |
| E. E. Smith Unit 1 O-1-12959 | Zarvona Energy LLC only | First Shot (Austin Chalk) | Gonzales | 1 | 291K | 140K | Jan 1993 – Apr 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 |
| Ned Smith Unit O-11-66532 | Estancia Oil & Gas, LLC only | Reo (JO Mill, Lower) | Borden | 4 | 272K | 68.9K | Jan 1993 – Mar 2026 |
| McCallum-Smith Unit 1 O-3-22754 | CML Exploration, LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 270K | 350K | May 1995 – Apr 2026 |
| Sealy & Smith Unit O-10-15504 | Basin Oil & Gas Operating, LLC only | Halley, South (Queen Sand) | Winkler | 14 | 262K | 648K | Jan 1993 – Apr 2026 |
| Lavelle-Smith Unit O-8-28847 | Pony Express Corporate Trust only | Lake Coleman (Morris 2750) | Coleman | 17 | 241K | 72.2K | Sep 2000 – Aug 2024 |
| 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 |
| Smith Unit A-531 O-6-14085 | Arcadia Energy Resources, LLC only | Brookeland (Austin Chalk, 8800) | Newton | 1 | 196K | 1.6M | Apr 2001 – Apr 2026 |
| Smith Unit a Dim O-1-16893 | Ineos USA Oil & Gas LLC only | Briscoe Ranch (Eagleford) | Dimmit | 1 | 186K | 557K | May 2013 – Apr 2026 |
| Smith Unit G-4-255576 | JC Bear Operating LLC only | Mobil-David (Frio 12,600) | Nueces | 1 | 138K | 2.4M | Feb 2010 – Mar 2026 |
| Lake-Smith Unit G-3-147607 | Enervest Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 132K | 1.42M | Nov 1993 – Nov 2012 |
| Smith Unit O-2-10224 | Rocc Oil & Gas, L.P. only | Eagleville (Eagle Ford-2) | Lavaca | 1 | 120K | 215K | Oct 2012 – Aug 2020 |
| Bobby Smith Unit O-3-22535 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 120K | 78.5K | Sep 1994 – Jul 2020 |
| Smith-Smith Unit O-3-25683 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 82.2K | 0 | Nov 2010 – Oct 2020 |
| Walter Smith Unit O-8-31022 | L.C.S. Production Company only | Sherry (Strawn) | Stonewall | 4 | 79.8K | 24.7K | May 2012 – Apr 2026 |
| Smith Unit O-13-32208 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 68.7K | 282K | Nov 2011 – Aug 2014 |
| Sealy Smith Unit G-3-145452 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk, Gas) | Burleson | 1 | 64.4K | 1.82M | Apr 1993 – Jun 2017 |
| Smith Unit O-10-34614 | PPC Operating Company LLC only | Mustang (Fusselman) | Glasscock | 1 | 56.9K | 110K | Aug 1995 – Jun 2012 |
| Mc Intosh Goldsmith Unit A O-6-5679 | Atlas Operating LLC only | Quitman (Sub-Clarksville) | Wood | 1 | 55K | 774 | Jan 1993 – Mar 2026 |
| Royston-Smith Unit O-8-18002 | Creed Operating Co., LLC only | Alkali Creek, SW (Flippen) | Fisher | 1 | 36.3K | 32 | Jan 1993 – Dec 2015 |
| Smith Unit O-2-9021 | KDM Operating, LLC only | Bloomington (4600) | Victoria | 1 | 31.4K | 0 | Feb 2006 – Apr 2014 |
| Clyde Smith Unit O-13-31013 | Bedrock Production, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 31.2K | 765K | Nov 2007 – Mar 2023 |
| Smith Unit O-2-8376 | XOG Operating LLC only | Bloomington (6000) | Victoria | 1 | 23.5K | 10K | Dec 1997 – Dec 2005 |
| Richard Smith Unit III O-3-21079 | McDaniel Company, Inc., The only | Kurten (Buda) | Brazos | 1 | 21.1K | 43.9K | Dec 1993 – May 1997 |
| Claude Brocksmith Unit O-3-26172 | Redbud E & P, Inc. only | Kurten (Woodbine) | Brazos | 1 | 18.2K | 0 | Oct 2011 – Apr 2026 |
| Dugger-Smith Unit G-3-201120 | Magnolia Oil & Gas Operating LLC only | Navasota River (Cretaceous Lwr.) | Brazos | 1 | 14.6K | 1.73M | Jan 2004 – Oct 2021 |
| Smith Unit O-14-6085 | Mewbourne Oil Company only | Buler, North (Cleveland) | Ochiltree | 1 | 14.3K | 619K | Jan 1993 – Apr 2011 |
| Smith Unit O-13-24549 | Quest Petroleum Company only | Porter (Miss.) | Jack | 1 | 14K | 21 | Jan 1993 – Jan 2025 |
| Smith Unit O-2-7993 | Lomak Production Company only | Bloomington (6000) | Victoria | 1 | 10.2K | 31.4K | Aug 1994 – Feb 1996 |
| Jerry Smith Unit G-13-267777 | Scout Energy Management LLC only | Newark, East (Barnett Shale) | Wise | 1 | 10K | 173K | Aug 2012 – Sep 2019 |
| Taylor-Smith Unit O-10-35731 | Prize Operating Company only | Keystone (Holt) | Winkler | 1 | 10K | 32.9K | Jan 1998 – Nov 2000 |
| Smith Unit O-13-18196 | Quest Petroleum Company only | Jack County Regular | Jack | 3 | 9.53K | 138 | Jun 1995 – Oct 2022 |
| Smith Unit O-13-32847 | Bulwark Oil & Gas, LLC only | Young County Regular | Young | 1 | 8.48K | 1.33K | May 2014 – Apr 2026 |
| Lester Smith Unit O-13-29097 | Herring, Ray only | Street (Caddo) | Jack | 1 | 8.34K | 37.1K | Feb 1996 – Jan 1999 |
| Sealy Smith Unit G-3-148181 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk, Gas) | Burleson | 1 | 7.75K | 213K | Jan 1994 – Jan 2002 |
| Smith Unit O-6-12558 | Key Production Company, Inc. only | Lane Chapel (Paluxy B Sand) | Smith | 1 | 7.45K | 45K | Jan 1993 – Jun 1994 |
| Werner-Smith Unit G-6-82809 | Harleton Oil & Gas Inc. only | Carthage (Cotton Valley) | Panola | 1 | 5.92K | 491K | Jan 1993 – Mar 2012 |
| Smith Unit O-10-43340 | PPC Operating Company LLC only | Mustang (Wolfcamp) | Glasscock | 1 | 4.63K | 8.54K | Jul 2012 – Nov 2013 |