| Dobrovolny-Burt Unit O-3-21412 | Holley Oil Company, LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 18.2K | 57.2K | Jan 1993 – Jan 1999 |
| Little Unit O-3-24269 | 7711 Corporation, The only | Kurten (Buda) | Brazos | 1 | 17.9K | 37.4K | Sep 2002 – Dec 2004 |
| Dr. Ferreira O-3-25704 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 17.8K | 870K | Sep 2010 – Mar 2026 |
| Goen, Oliver F. Unit G-3-170769 | Magnolia Oil & Gas Operating LLC only | Kurten (Georgetown) | Brazos | 1 | 17.8K | 542K | Aug 1998 – Mar 2026 |
| Curtis O-3-20732 | Anadarko E&P Company LP only | Giddings (Austin Chalk-3) | Brazos | 1 | 17.7K | 50.3K | Jan 1993 – Mar 2002 |
| College Hills Unit O-3-21673 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 17.5K | 130K | Jan 1993 – Jul 1995 |
| A. M. Williams Unit 2 O-3-23931 | Impetro Operating LLC only | Kurten (Woodbine) | Brazos | 1 | 17.5K | 0 | Sep 2000 – May 2013 |
| Siegert O-3-17165 | Ginger Petroleum Company, Inc. only | Kurten (Buda) | Brazos | 1 | 17.4K | 20 | Jan 1993 – Nov 2014 |
| Conlee O-3-17844 | Goldsmith Operating, LLC only | Aggieland (Woodbine) | Brazos | 1 | 17.3K | 476K | Jan 1993 – May 2020 |
| Patranella, Chas. "A" O-3-16625 | Holley Oil Company, LLC only | Kurten (Buda) | Brazos | 1 | 17.3K | 4.07K | Jan 1993 – Jul 2001 |
| Waltman-Chance Farms Unit G-3-144378 | Union Pacific Resources Company only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 17.3K | 89K | Jan 1993 – Feb 1997 |
| Angonia O-3-19091 | Delaware Ecco Petroleum Inc. only | Kurten (Buda) | Brazos | 2 | 17.2K | 14.8K | Jan 1993 – Jul 1997 |
| Day Unit G-3-156385 | Ogden Resources Corporation only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 17K | 447K | Jun 1995 – Oct 2011 |
| Vilas-Walton G-3-160200 | Verdun Oil & Gas LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 16.8K | 2.39M | Apr 1996 – Mar 2026 |
| Patterson-Clark Unit G-3-186375 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 16.8K | 785K | Apr 2001 – Mar 2026 |
| Cutbirth "B" O-3-20234 | Cago, Inc. only | Kurten (Buda) | Brazos | 1 | 16.8K | 14K | Jan 1993 – Jan 2002 |
| Hill, Gifford "A" O-3-18529 | Apache Corporation only | Caldwell, NE (Georgetown) | Brazos | 1 | 16.6K | 39.6K | Jan 1993 – May 1997 |
| Clearlake Properties, Inc. O-3-22503 | La Campana, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 16.5K | 15.3K | Apr 1994 – Jul 2006 |
| Sims O-3-21458 | Chesapeake Operating, L.L.C. only | Caldwell (Austin Chalk) | Brazos | 1 | 16.4K | 15.9K | Jan 1993 – Feb 2002 |
| Ironside Unit G-3-164064 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 16.4K | 1.31M | Mar 1997 – Oct 2024 |
| Weedon, Madaleen O-3-21572 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 16.3K | 130K | Jan 1993 – Nov 1996 |
| Morello, Buddy O-3-21982 | Howell Petroleum Corporation only | Caldwell (Austin Chalk) | Brazos | 1 | 16.2K | 13.7K | Jan 1993 – Sep 1999 |
| Weedon, J. E. Unit G-3-170172 | Magnolia Oil & Gas Operating LLC only | Kurten (Georgetown) | Brazos | 1 | 15.7K | 605K | Jun 1998 – Aug 2019 |
| Stasny, W.A. O-3-21263 | Ogden Resources Corporation only | Giddings (Austin Chalk-3) | Brazos | 1 | 15.6K | 138K | Jan 1993 – Feb 2000 |
| Carroll-Peters Unit O-3-21302 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 15.6K | 102K | Jan 1993 – Sep 1996 |
| Big Creek OL G-3-161627 | BBX Operating, L.L.C. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 15.5K | 1.83M | Sep 1996 – Nov 2019 |
| Court, Vince O-3-19017 | 7711 Corporation, The only | Caldwell, NE (Georgetown) | Brazos | 1 | 15.5K | 8.62K | Jan 1993 – Dec 2001 |
| Kay, R. O-3-20549 | Howell Petroleum Corporation only | Caldwell (Austin Chalk) | Brazos | 1 | 15.4K | 6.55K | Jan 1993 – Nov 2000 |
| Charli O-3-25024 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 15.4K | 117K | Aug 2007 – Aug 2017 |
| McCullough-McCullough Unit O-3-25536 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Brazos | 1 | 15.4K | 298K | May 2010 – Jan 2024 |
| McCullough O-3-25407 | Shidler, Mark L., Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 15.4K | 241K | Mar 2009 – Jun 2022 |
| Aggie Unit O-3-24175 | B.W.O.C., Inc. only | Giddings (Buda) | Brazos | 1 | 15.2K | 33.5K | Oct 2001 – Dec 2003 |
| McSwain-Glenn Unit O-3-15164 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk-3) | Brazos | 2 | 14.7K | 181K | Jan 1993 – Sep 1996 |
| 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 |
| Ed O-3-25555 | Wildfire Energy Operating LLC only | Giddings (Buda) | Brazos | 1 | 14.3K | 400K | Apr 2010 – Oct 2019 |
| Locke, Maude O-3-20144 | Holley Oil Company, LLC only | Kurten (Woodbine) | Brazos | 1 | 14.2K | 1.07K | Jan 1993 – Jan 2007 |
| Fojtik-Swoboda O-3-21841 | Baker, Brent Oil & Gas, Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 14.2K | 67.6K | Jan 1993 – Dec 1995 |
| Beal-Elliott G-3-142697 | Rosewood Resources, Inc. only | Clay, NE (Austin Chalk 12200) | Brazos | 1 | 14.1K | 385K | Jan 1993 – Sep 1998 |
| Yellow Rose Unit O-3-23208 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 14.1K | 3.98K | Mar 1997 – Sep 1997 |
| Horton Unit O-3-21429 | Patterson Petroleum, Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 14K | 105K | Jan 1993 – Sep 1996 |
| Lyons Unit G-3-153433 | Moore Petroleum Service, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 14K | 404K | Jan 1995 – Jun 1998 |
| Mize-Gilpin Unit I O-3-21560 | Bexco Operating, Inc. only | Giddings (Austin Chalk-3) | Brazos | 1 | 13.9K | 18K | Jan 1993 – Apr 1995 |
| Luza Unit O-3-21050 | Lonestar Pluggers, Inc. only | Kurten (Austin Chalk) | Brazos | 1 | 13.7K | 30.4K | Jan 1993 – Jun 1999 |
| Peters-Wheeler Unit O-3-21626 | Union Pacific Resources Company only | Giddings (Austin Chalk-3) | Brazos | 1 | 13.7K | 69.2K | Jan 1993 – Feb 1996 |
| Steele O-3-18766 | Magnolia Oil & Gas Operating LLC only | Kurten (Buda) | Brazos | 1 | 13.6K | 2.2K | Jan 1993 – Apr 2026 |
| Sebesta Brothers O-3-17427 | Texas Petroleum Investment Co. only | Aggieland (Woodbine) | Brazos | 1 | 13.5K | 144K | Jan 1993 – Nov 2006 |
| Kindt, L. Unit II O-3-16691 | Patterson Petroleum LLC only | Kurten (Buda) | Brazos | 3 | 13.5K | 25.2K | Jan 1993 – Oct 1996 |
| Weems Est. Etal O-3-9557 | Shoreham Oil & Gas Company, Inc. only | Millican Dome | Brazos | 7 | 13.3K | 6.05K | Jan 1993 – Jun 2002 |
| Arhopulos-Crenshaw Unit G-3-147564 | Williams, Clayton Energy, Inc. only | Giddings (Austin Chalk, Gas) | Brazos | 1 | 13.2K | 583K | Sep 1993 – Jul 2013 |
| Britten O-3-21750 | WCS Oil & Gas Corporation only | Giddings (Austin Chalk-3) | Brazos | 1 | 13.1K | 25.5K | Jan 1993 – Jan 1997 |