| Mills Unit O-2-11838 | EOG Resources, Inc. only | Sugarkane (Austin Chalk) | Karnes | 6 | 2.46M | 9.31M | Jul 2019 – Aug 2026 |
| Mills-Strain Unit O-11-66202 | Schlachter Operating Corporation only | Sharon Ridge (1700) | Mitchell | 120 | 1.45M | 27 | by Jan 1993 – Aug 2026 |
| Ledbetter O-14-8184 | Mmgl Txph, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 1.08M | 5.04M | May 2010 – Aug 2026 |
| Bennett, Mills Estate Fee O-4-12672 | Atlas Operating LLC only | Mills Bennett (Consolidated) | Brooks | 49 | 876K | 1.37M | Feb 1997 – Aug 2026 |
| Tom-Mills 48C O-10-49123 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 855K | 1.76M | Mar 2018 – Aug 2026 |
| Stiles 1 O-14-8755 | Formentera Operations LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 844K | 4.59M | Aug 2012 – Aug 2026 |
| Frye Ranch O-14-8521 | Le Norman Operating LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 5 | 836K | 3.4M | Sep 2011 – Sep 2015 |
| Britt-Rathjen O-14-9212 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 782K | 3.69M | May 2014 – Aug 2026 |
| Tom-Mills 48D O-10-49623 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 764K | 1.33M | Mar 2018 – Aug 2026 |
| Mills O-14-8107 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 10 | 751K | 5.57M | Mar 2010 – Aug 2026 |
| Luker O-14-9216 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 740K | 3.62M | Mar 2010 – Aug 2026 |
| Buckingham O-14-8580 | Mustang Fuel Corporation only | Mills Ranch (Granite Wash Cons.) | Wheeler | 2 | 667K | 2.56M | Sep 2011 – Aug 2026 |
| Tom-Mills 48E O-10-50379 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 663K | 793K | Mar 2018 – Aug 2026 |
| Mercer, Mills O-1-1089 | Texas Petroleum Investment Co. only | Luling-Branyon | Caldwell | 15 | 603K | 40 | by Jan 1993 – Aug 2026 |
| Tom-Mills 48J O-10-50250 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 587K | 547K | Mar 2018 – Aug 2026 |
| Ruth 4 O-14-8418 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 2 | 584K | 2.25M | Apr 2011 – Aug 2026 |
| Buckingham O-14-8118 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 546K | 3.62M | Mar 2010 – Aug 2026 |
| Tom-Mills 48I O-10-50091 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 545K | 427K | Mar 2018 – Aug 2026 |
| Bass O-14-8113 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 533K | 2.24M | Mar 2010 – Aug 2026 |
| Davis, G.C. O-14-9029 | Mmgl Txph, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 519K | 3.02M | Apr 2012 – Aug 2026 |
| Lister A O-14-9039 | Mmgl Txph, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 2 | 499K | 1.54M | Dec 2013 – Aug 2026 |
| Puryear 28 O-14-8564 | Enervest Operating, L.L.C. only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 479K | 2.99M | Apr 2012 – Dec 2014 |
| Davis 60 O-14-8601 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 466K | 2.74M | Oct 2011 – Aug 2026 |
| Hink O-14-8116 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 460K | 1.6M | Mar 2010 – Aug 2026 |
| Saner O-6-1232 | Linder, John Operating Co., LLC only | Pine Mills, E. (Woodbine) | Wood | 6 | 447K | 582 | by Jan 1993 – Aug 2026 |
| Hagerman O-14-9758 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 1 | 440K | 2M | Apr 2021 – Aug 2026 |
| Ledbetter 66 O-14-8607 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 1 | 436K | 1.76M | Apr 2011 – Aug 2026 |
| Brown O-14-8881 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 2 | 432K | 2.23M | Apr 2013 – Aug 2026 |
| East Texas Oil Company Fee "B" O-3-21875 | Milestone Operating, Inc. only | Village Mills (Cockfield 2) | Hardin | 5 | 430K | 598K | by Jan 1993 – Nov 2022 |
| Mills O-14-7958 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash) | Wheeler | 5 | 400K | 1.36M | Nov 2008 – Feb 2010 |
| Basin Royalty O-14-9596 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 1 | 396K | 901K | Aug 2017 – Aug 2026 |
| Mooney O-14-8203 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 367K | 1.96M | May 2010 – Aug 2026 |
| Stiles 3 O-14-8776 | Formentera Operations LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 6 | 359K | 3.47M | Sep 2012 – Aug 2026 |
| Frye O-14-8753 | Presidio Petroleum LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 357K | 1.48M | Jul 2013 – Aug 2026 |
| Mills Bennett O-3-25581 | Davis Southern Operating Co LLC only | Padgett (Yegua 5 Sand) | Polk | 2 | 347K | 83K | Jul 2010 – Jul 2026 |
| Neeley O-14-8111 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 5 | 342K | 2.04M | Mar 2010 – Aug 2026 |
| Ivestor 57 SL O-14-8930 | Mmgl Txph, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 4 | 335K | 1.86M | Apr 2012 – Aug 2026 |
| Sallie O-14-8112 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 326K | 1.81M | Mar 2010 – Aug 2026 |
| Britt O-14-8520 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 323K | 1.31M | Apr 2012 – Aug 2026 |
| Tom-Mills 48H O-10-49025 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 322K | 756K | Sep 2017 – Aug 2026 |
| Tom-Mills 48A O-10-49059 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 302K | 879K | Sep 2017 – Aug 2026 |
| Tom-Mills 48B O-10-49040 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 300K | 910K | Sep 2017 – Aug 2026 |
| Mills O-1-17780 | Sage Energy Company only | Pearsall (Buda, S.) | Dimmit | 2 | 298K | 1.38M | Nov 2012 – Aug 2026 |
| Second Sub-Clkvle. Form. Unit O-6-4886 | Buccaneer Operating LLC only | Pine Mills (Sub-Clarksville) | Wood | 18 | 294K | 3.54K | by Jan 1993 – Aug 2026 |
| Bass-Calcote O-14-8115 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 293K | 1.21M | Mar 2010 – Aug 2026 |
| Tom-Mills 48F O-10-49011 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 291K | 463K | Sep 2017 – May 2025 |
| East Texas Oil Co. Fee -C- O-3-10916 | Milestone Operating, Inc. only | Village Mills, East (Z-2) | Hardin | 1 | 289K | 141K | by Jan 1993 – Aug 2026 |
| Tom-Mills 48G O-10-49217 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 1 | 284K | 702K | Oct 2017 – Aug 2026 |
| Coltharp O-14-8676 | Sanguine Gas Exploration, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 266K | 1.34M | Dec 2011 – Aug 2026 |
| Morrison O-14-8870 | Unbridled Resources, LLC only | Mills Ranch (Granite Wash Cons.) | Wheeler | 3 | 266K | 2.12M | Sep 2012 – Aug 2026 |