| C.W. Hahn Unit A O-2-9719 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 7 | 2.46M | 4.66M | Oct 2011 – Aug 2026 |
| K. Hahn Unit A O-2-9949 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 1 | 728K | 1.43M | Sep 2012 – Aug 2026 |
| K. Hahn-Cilibraise Usw D O-2-12166 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 1 | 700K | 1.36M | Jun 2021 – Aug 2026 |
| K. Hahn-Cilibraise Usw B O-2-12168 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 1 | 557K | 1.33M | Jun 2021 – Aug 2026 |
| K. Hahn-Cilibraise Usw C O-2-12171 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 1 | 551K | 1.16M | Jun 2021 – Aug 2026 |
| K. Hahn-Cilibraise Usw A O-2-12170 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | De Witt | 1 | 527K | 1.06M | Jun 2021 – Aug 2026 |
| Friesenhahn Unit O-1-17694 | EOG Resources, Inc. only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 238K | 127K | Apr 2014 – Aug 2026 |
| Hahn O-2-8795 | Kebo Oil & Gas, Inc. only | Long Mott, East (7450) | Calhoun | 3 | 177K | 423K | Jan 2003 – Aug 2026 |
| Stuermer-Plueckhahn O-3-22471 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 1 | 155K | 1.68M | Jul 1994 – Nov 2021 |
| Hahn Dew G-2-273147 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 103K | 2.33M | Feb 2014 – Jun 2024 |
| Hahn A G-2-264159 | Devon Energy Production Co, L.P. only | De Witt (Eagle Ford Shale) | De Witt | 1 | 102K | 814K | Dec 2011 – Aug 2026 |
| Kleine-Hahn-Bau Usw A G-2-298435 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 102K | 2.07M | Jan 2024 – Aug 2026 |
| Hahn Dew G-2-273149 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 97.7K | 2.08M | Feb 2014 – Sep 2021 |
| Hahn Dew G-2-268704 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 97K | 1.85M | Sep 2012 – Jun 2024 |
| Kleine-Hahn-Bau Usw B G-2-297951 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 78.3K | 1.65M | Jan 2024 – Aug 2026 |
| Kleine-Hahn-Bau Ulw C G-2-298155 | Burlington Resources O & G Co LP only | De Witt (Eagle Ford Shale) | De Witt | 1 | 69K | 1.39M | Jan 2024 – Aug 2026 |
| McDonald-Hahn G-2-193275 | C & E Operating, Inc. only | Long Mott (7800) | Calhoun | 1 | 67.8K | 479K | Jan 2003 – May 2007 |
| Hahn, Peter H. et al Unit G-3-132219 | Faulconer Energy, LLC only | Porter's Creek (Yegua) | Wharton | 1 | 63.9K | 6.39M | by Jan 1993 – Aug 2026 |
| Hahn O-2-9069 | C & E Operating, Inc. only | Long Mott,north (8200) | Calhoun | 1 | 51K | 55.7K | Feb 2006 – Jan 2013 |
| Hahn Edwards Unit O-11-69213 | R2Q Operating LLC only | Croton Creek, E. (Tannehill) | Dickens | 1 | 50.1K | 0 | Mar 2008 – Aug 2026 |
| Stuermer-Plueckhahn Unit G-3-205215 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 1 | 45.3K | 1.51M | Mar 2003 – Jul 2023 |
| Hahn O-13-34149 | Extech Operating, LLC only | Newport, S. (Bend Congl.) | Montague | 2 | 28.5K | 328K | Nov 2022 – Aug 2026 |
| Campbell-Hahn Unit G-1-172244 | Yates Energy Corporation only | Dubose (Edwards -A-) | Gonzales | 1 | 27.4K | 2.62M | Sep 1998 – Nov 2025 |
| Hahn O-3-18444 | Atlas Operating LLC only | Hooker Creek (Navarro A) | Lee | 1 | 22.5K | 20.1K | by Jan 1993 – Aug 2026 |
| Hahn "A" O-3-18811 | Ads Oil & Gas, Inc. only | Hooker Creek (Navarro B) | Lee | 1 | 16.1K | 43 | by Jan 1993 – Dec 2019 |
| Friesenhahn O-1-17997 | Trinity Operating (Usg), LLC only | Pearsall (Austin Chalk) | Frio | 1 | 13.7K | 0 | Jan 2014 – Jun 2016 |
| Hahn O-8-26765 | Gunn Oil Company only | Lovers Resort (Congl.) | Stonewall | 1 | 13K | 18 | by Jan 1993 – May 1998 |
| Friesenhahn, M.J. #2 O-1-9230 | South Sam Operating Company, LLC only | Monksfield (350 Sand) | Bexar | 16 | 12.2K | 169 | by Jan 1993 – Aug 2021 |
| Friesenhahn, M.J. #1 O-1-7986 | South Sam Operating Company, LLC only | Monksfield (350 Sand) | Bexar | 35 | 9.58K | 168 | by Jan 1993 – Aug 2021 |
| Friesenhahn-Budnik O-1-13287 | Sollohub Petro LLC only | Somerset | Atascosa | 4 | 9.3K | 107 | by Jan 1993 – Jul 2026 |
| Hahn O-2-8986 | C & E Operating, Inc. only | Long Mott (Frio) | Calhoun | 1 | 8.98K | 132K | Apr 2003 – Oct 2004 |
| Hahn A G-2-201137 | C & E Operating, Inc. only | Long Mott (8300) | Calhoun | 1 | 7.05K | 54.7K | Nov 2003 – Jun 2005 |
| Hahn G-2-205185 | C & E Operating, Inc. only | Long Mott,north (8200) | Calhoun | 1 | 6.87K | 167K | Jan 2004 – Jan 2006 |
| Hahn Unit G-3-169856 | Crawford Hughes Operating Co. only | Giddings (Austin Chalk, Gas) | Washington | 1 | 5.62K | 737K | Dec 1998 – Feb 2023 |
| Campbell-Hahn Unit G-1-139161 | Yates Energy Corporation only | Dubose (Edwards -A-) | Gonzales | 1 | 5.4K | 594K | by Jan 1993 – May 2019 |
| Hahn Estate G-3-227324 | Denali Oil & Gas Management, LLC only | Hardeman Slough | Matagorda | 1 | 4.45K | 819K | Mar 2007 – Jul 2010 |
| Hahn G-2-203411 | C & E Operating, Inc. only | Long Mott (Marg) | Calhoun | 1 | 4.42K | 579K | May 2004 – May 2007 |
| Elmo Friesenhahn Unit O-1-13571 | Omni Petroleum Corporation only | Pearsall (Austin Chalk) | Dimmit | 1 | 4.4K | 10.8K | by Jan 1993 – Oct 1994 |
| McDonald-Hahn G-2-194607 | C & E Operating, Inc. only | Long Mott (Frio) | Calhoun | 1 | 4.13K | 18.1K | Jan 2003 – Mar 2003 |
| Hahn Heirs O-8-26415 | Fortson Oil Company only | Mullen Ranch (Bend) | Stonewall | 1 | 3.61K | 691 | by Jan 1993 – Mar 1995 |
| Bohl/Hahn/Perry O-3-18524 | Atlas Operating LLC only | Hooker Creek (Navarro A) | Lee | 1 | 3K | 23 | Apr 1993 – Aug 2015 |
| Henke-Hahn G-2-203121 | C & E Operating, Inc. only | Long Mott, South (Frio, Lower) | Calhoun | 1 | 2.62K | 124K | May 2004 – Apr 2008 |
| Outback Hahn O-2-11260 | Kebo Oil & Gas, Inc. only | Long Mott, East (7850) | Calhoun | 1 | 1.77K | 12.2K | Jul 2016 – Feb 2018 |
| Hahn Heirs Unit O-8-26509 | Fortson Oil Company only | Mullen Ranch (Bend) | Stonewall | 1 | 1.47K | 21 | by Jan 1993 – Mar 1995 |
| Hahn-Ashorn G-3-128897 | Magnolia Oil & Gas Operating LLC only | Jerry's Quarters (A C 11900) | Washington | 1 | 1.44K | 294K | by Jan 1993 – Oct 2014 |
| Outback Hahn G-2-280500 | Kebo Oil & Gas, Inc. only | Long Mott, East (7850) | Calhoun | 1 | 1.43K | 4.04K | May 2016 – Jun 2016 |
| Friesenhahn-Strait Unit O-1-13415 | McDaniel Company, Inc., The only | Pearsall (Austin Chalk) | Dimmit | 1 | 990 | 4 | by Jan 1993 – Sep 1993 |
| Hahn Unit G-3-169855 | Southwest Resources, Inc. only | Navasota River (Cretaceous Lwr.) | Washington | 1 | 600 | 70.9K | Jul 1998 – Nov 1998 |
| Friesenhahn O-1-9324 | Friesenhahn, M.J. only | Alta Vista | Bexar | 1 | 294 | 19 | Mar 1993 – Feb 1995 |
| Theo Hahn O-3-27354 | TX Of&gc, LLC only | Brenham | Austin | 1 | 223 | 0 | Jan 2017 – Sep 2021 |