| Crnkovic, Mildred Unit O-3-13912 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 2 | 412K | 824K | by Jan 1993 – Jul 2026 |
| Hutchinson, Mildred O-14-8077 | Mewbourne Oil Company only | Pan Petro (Cleveland) | Ochiltree | 4 | 318K | 2.07M | Nov 2009 – Aug 2026 |
| Mildred Unit O-1-18075 | Texas American Resources Company only | Eagleville (Eagle Ford-1) | Atascosa | 2 | 245K | 160K | Jul 2015 – Aug 2026 |
| Mildred Good 211 O-14-9123 | Presidio Petroleum LLC only | Pan Petro (Cleveland) | Ochiltree | 2 | 189K | 515K | Jun 2014 – Aug 2026 |
| Mildred Esse Giese Unit A O-2-10111 | Burlington Resources O & G Co LP only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 178K | 774K | Aug 2012 – Aug 2026 |
| Jones, Mildred -B- O-10-7088 | Vital Energy, Inc. only | Vealmoor | Howard | 1 | 173K | 303K | by Jan 1993 – Oct 2018 |
| Mildred O-10-40498 | Discovery Operating, Inc. only | Spraberry (Trend Area) | Martin | 2 | 136K | 221K | Jul 2010 – Aug 2026 |
| Mildred House Unit A O-2-9940 | Verdun Oil & Gas LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 99.3K | 417K | Jul 2012 – Aug 2026 |
| Mildred O-10-22185 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 3 | 97.4K | 234K | by Jan 1993 – Apr 2026 |
| Mildred 34 O-9-18583 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) R 40 Exc | Upton | 2 | 83.6K | 422K | May 2014 – Mar 2025 |
| Greer, Mildred F. G-14-260144 | Mewbourne Oil Company only | Lipscomb (Cleveland) | Lipscomb | 1 | 52.1K | 1.69M | Nov 2010 – Aug 2026 |
| Mildred F. Greer G-14-255704 | Mewbourne Oil Company only | Lipscomb (Cleveland) | Lipscomb | 1 | 49.1K | 1.48M | Feb 2010 – Aug 2026 |
| Taylor, Mildred O-8-20957 | Jrow Energy LLC only | Four Way (Noodle Creek) | Jones | 5 | 44.8K | 20 | Feb 1993 – Aug 2023 |
| Davidson, Mildred G-14-213557 | Unbridled Resources, LLC only | Mills Ranch (Lister Atoka Wash) | Wheeler | 1 | 35.3K | 1.93M | Jul 2005 – Aug 2026 |
| Nagel, Mildred et al Unit O-1-10604 | Seguro Well Service, Inc. only | Peach Creek (Austin Chalk) | Gonzales | 1 | 32.8K | 3.13K | by Jan 1993 – Nov 2023 |
| Mildred O-3-15403 | Magnolia Oil & Gas Operating LLC only | Giddings (Austin Chalk-3) | Lee | 2 | 30.2K | 737K | by Jan 1993 – Aug 2026 |
| Mildred Thompson "A" G-5-257531 | Diversified Production LLC only | Freestone (CV-Bossier Cons.) | Limestone | 1 | 28.6K | 3.4M | Apr 2010 – Aug 2026 |
| Mildred O-6-14999 | Aethon Energy Operating LLC only | Huxley (Fredricksburg) | Shelby | 2 | 27.5K | 500K | Nov 2010 – Jun 2018 |
| Mildred Jones O-10-46321 | Crescent Energy Operating, LLC only | Vealmoor | Howard | 2 | 24.8K | 23K | Jun 2014 – Jan 2026 |
| Mildred O-14-6596 | Unbridled Resources, LLC only | Lone Butte (Cleveland) | Ochiltree | 1 | 23.7K | 486K | by Jan 1993 – Apr 2018 |
| Brown, Mildred G-3-110367 | Wildfire Energy Operating LLC only | Madisonville (Sub-Clark, Gas) | Madison | 1 | 20K | 920K | by Jan 1993 – Jul 2026 |
| Mildred O-3-17729 | Well-Co Solutions, LLC only | Giddings (Austin Chalk-3) | Fayette | 1 | 19.8K | 519K | by Jan 1993 – Feb 2015 |
| Mildred G-13-280974 | FX Energy Operating, LLC only | KRS (Marble Falls) | Jack | 1 | 18.5K | 630K | Mar 2016 – Aug 2026 |
| Diller, Mildred "A" O-8-21029 | Quantum Investments only | Shackelford County Regular | Shackelford | 27 | 16.1K | 56 | by Jan 1993 – May 2004 |
| Greer, Mildred F. -880- G-14-151249 | BP America Production Company only | Mammoth Creek (Tonkawa) | Lipscomb | 1 | 15.5K | 433K | Jun 1994 – Jul 1999 |
| Smith, Mildred G-13-209480 | Eagleridge Operating, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 14.7K | 1.03M | Apr 2005 – Aug 2026 |
| Wines, Mildred O-13-27941 | Biehl Oil Service's LLC only | Buffalo Springs, N. (Congl.) | Clay | 1 | 14.3K | 1.65K | by Jan 1993 – Jul 2016 |
| Coleman, Mildred et al "A" O-11-5700 | Onaroll Operating LLC only | Sharon Ridge (1700) | Mitchell | 2 | 13.2K | 36 | by Jan 1993 – Jul 2026 |
| Mildred O-11-12851 | Schlachter Operating Corporation only | Sharon Ridge (1700) | Mitchell | 3 | 13.2K | 21 | by Jan 1993 – Aug 2026 |
| Diller, Mildred Etal O-8-5964 | Grothe Bros., Inc. only | Shackelford County Regular | Shackelford | 5 | 13.1K | 22 | by Jan 1993 – Sep 2014 |
| Hutchinson, Mildred O-14-7622 | BP America Production Company only | Paul Harbaugh (Atoka Sand) | Ochiltree | 1 | 7.16K | 216K | Aug 2005 – Sep 2006 |
| East, Mildred B. O-3-13702 | Rusk Energy Operating LLC only | Willard, SE (Navarro B) | Burleson | 1 | 6.96K | 126 | by Jan 1993 – Nov 2024 |
| Arnold, Mildred O-2-7663 | Hurd Enterprises, Ltd. only | Cuthbertson (Mackhank) | De Witt | 2 | 6.37K | 477K | by Jan 1993 – Dec 1997 |
| Brown, Mildred G-3-242500 | Wildfire Energy Operating LLC only | Madisonville (Sub-Clark, Gas) | Madison | 1 | 5.24K | 442K | Apr 2009 – Jul 2026 |
| Durham, Mildred et Al G-13-36632 | Eagleridge Operating, LLC only | Boonsville (Bend Congl., Gas) | Jack | 1 | 5.14K | 653K | by Jan 1993 – Aug 2026 |
| Hutchinson, Mildred G-14-22501 | BP America Production Company only | Paul Harbaugh (Morrow) | Ochiltree | 1 | 4.6K | 512K | by Jan 1993 – May 2005 |
| Hutchinson, Mildred G-14-223534 | Latigo Petroleum, LLC only | Paul Harbaugh (Atoka Sand) | Ochiltree | 1 | 4.27K | 772K | Oct 2006 – Aug 2026 |
| Greer, Mildred F. G-14-108010 | Latigo Petroleum, LLC only | Lipscomb (Cleveland) | Lipscomb | 1 | 3.94K | 436K | by Jan 1993 – Aug 2026 |
| Weeks, Mildred N. O-1-13194 | Miesch Exploration Corporation only | Pearsall (Austin Chalk) | La Salle | 1 | 3.6K | 902 | by Jan 1993 – Sep 1996 |
| Durham, Mildred O-13-28717 | Merit Energy Company only | Morris (Consolidated Congl.) | Jack | 1 | 3.58K | 294K | Dec 1993 – Jan 1999 |
| Durham, Mildred G-13-172296 | Eagleridge Operating, LLC only | Morris (Consolidated Congl.) | Jack | 1 | 3.4K | 574K | Feb 1999 – Aug 2026 |
| Patton, Mildred M. et Al O-11-9136 | Schlachter Operating Corporation only | Sharon Ridge (1700) | Mitchell | 1 | 3.02K | 18 | Feb 1993 – Aug 2026 |
| Hutchinson, Mildred M. Etal O-14-4093 | Midgard Energy Company only | Dutcher (Cleveland) | Ochiltree | 1 | 2.77K | 8.65K | by Jan 1993 – Apr 1996 |
| Durham, Mildred, et Al G-13-28989 | EP Operating Limited Partnership only | Boonsville (Bend Congl., Gas) | Jack | 1 | 2.21K | 38.7K | by Jan 1993 – Dec 1993 |
| Bolls, Mildred et Al G-6-120617 | SND Operating, L.L.C. only | Rodessa (Anhydrite Lower) | Marion | 1 | 2.03K | 445K | by Jan 1993 – Feb 2023 |
| Durham, Mildred et Al G-13-188444 | Eagleridge Operating, LLC only | Boonsville (Bend Congl., Gas) | Jack | 1 | 2.02K | 864K | Mar 2002 – Aug 2026 |
| Thompson, Mildred G-5-249225 | Diversified Production LLC only | Freestone (CV-Bossier Cons.) | Limestone | 1 | 1.87K | 3.66M | Jan 2009 – Aug 2026 |
| Thompson, Mildred G-5-258871 | Diversified Production LLC only | Freestone (CV-Bossier Cons.) | Limestone | 1 | 1.82K | 1.29M | Jul 2010 – Aug 2026 |
| Durham, Mildred Etal O-13-3746 | Merit Energy Company only | Jupiter (Conglomerate Upper) | Jack | 3 | 1.53K | 37.3K | by Jan 1993 – Dec 2000 |
| Mildred M. Hutchinson et Al O-14-9897 | H & L Exploration Company, LLC only | St. Clair (Granite Wash) | Ochiltree | 1 | 1.31K | 0 | Jul 2026 – Jul 2026 |