| Lawrence Trust Unit O-13-31727 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 3 | 512K | 1.23M | Mar 2010 – Jul 2026 |
| Green O-13-29412 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 4 | 497K | 4.11M | Sep 1997 – Jul 2026 |
| Bennett a Unit O-13-32207 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 2 | 370K | 985K | Sep 2011 – Nov 2023 |
| Viola Davis E Unit O-3-26141 | Wildfire Energy Operating LLC only | Giddings (Eagleford) | Burleson | 1 | 352K | 168 | Jun 2013 – Jul 2026 |
| Davis Unit O-13-31898 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 317K | 534K | Jan 2011 – Dec 2018 |
| Hoeldtke-Zetzsche Unit #1 O-13-27054 | Ingram, J. Oil & Gas, Inc. only | Bowie (Viola Limestone) | Montague | 5 | 274K | 655K | Jan 1993 – Jul 2026 |
| Barnes, J. E. O-13-29561 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 231K | 2.39M | Jul 1998 – Jul 2026 |
| Slagle-Fallon O-13-28319 | Little, Quintin Company,inc.,the only | Southmayd, North (Baker-Viola) | Grayson | 1 | 223K | 327K | Jan 1993 – Jul 2026 |
| Reddick (V) O-13-32968 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 196K | 531K | Oct 2013 – Jul 2026 |
| Otto O-13-34291 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 195K | 328K | Apr 2024 – Jul 2026 |
| Bug Off O-13-32325 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 182K | 490K | Aug 2012 – Jul 2026 |
| Davis, Viola OL Unit O-3-25397 | Wildfire Energy Operating LLC only | Giddings (Austin Chalk-3) | Burleson | 1 | 181K | 53 | Oct 2008 – Jul 2026 |
| Logston, Aggie O-13-26357 | Charter Oak Production Co., LLC only | Southmayd, North (Baker-Viola) | Grayson | 1 | 167K | 144K | Jan 1993 – Jul 2026 |
| Gibbons Unit O-13-32991 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 158K | 520K | Apr 2013 – Jul 2026 |
| Cannon O-13-32422 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 154K | 687K | Jan 2013 – Jul 2026 |
| Patterson Unit O-13-28666 | Felderhoff Production Company only | Southmayd, North (Baker-Viola) | Grayson | 1 | 150K | 664K | Oct 1993 – Jul 2026 |
| J & M Unit O-13-32381 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 146K | 556K | Jul 2012 – Jul 2026 |
| Hale, Viola O-10-43231 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Martin | 2 | 136K | 266K | Oct 2012 – Jul 2026 |
| Sneed O-13-27041 | B M Energy, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 3 | 119K | 454K | Jan 1993 – Jan 2022 |
| Wright O-13-32525 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 118K | 411K | Nov 2012 – Jul 2026 |
| William O-13-33299 | Tatanka Operating, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 113K | 276K | Aug 2015 – Jul 2026 |
| Strickland Unit O-13-31666 | EOG Resources, Inc. only | Saint JO, SE. (Viola) | Cooke | 1 | 104K | 877K | Jan 2010 – Jul 2026 |
| Viola Finnigan Wolfcamp Unit O-9-9421 | Coppertop only | Regal (Wolfcamp) | Schleicher | 2 | 102K | 6.91K | Jan 1993 – Jul 2026 |
| Helen O-13-33882 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 98.8K | 264K | Mar 2019 – Jul 2026 |
| Turner O-13-33761 | BKM Production only | Southmayd, North (Baker-Viola) | Grayson | 1 | 92.4K | 319K | Jun 2016 – Jul 2026 |
| Sweeney, H. O. O-13-29705 | R2Q Operating LLC only | Big Mineral Creek (Viola) | Grayson | 2 | 91.3K | 1.38M | Oct 1999 – Jul 2026 |
| Gatlin (V) O-13-34148 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 91.1K | 345K | Aug 2022 – Jul 2026 |
| Davis Unit O-13-29103 | Felderhoff Production Company only | Southmayd, North (Baker-Viola) | Grayson | 1 | 89.4K | 311K | Mar 1996 – Jul 2026 |
| Gowans (V) O-13-34170 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 87.1K | 103K | Sep 2022 – Jul 2026 |
| Withrow (V) O-13-32844 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 79.2K | 316K | Dec 2013 – Jun 2024 |
| Mitchell O-13-28856 | Felderhoff Production Company only | Southmayd, North (Baker-Viola) | Grayson | 2 | 78.5K | 76K | Sep 1994 – Jul 2026 |
| Barnes, C. H. Heirs O-13-30770 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 78.2K | 466K | Sep 2006 – Jul 2026 |
| Myers, Viola Estate O-13-17583 | Lindemann, Robert Operating only | Clay County Regular | Clay | 7 | 75.6K | 22 | Jan 1993 – Jul 2026 |
| Smith Unit O-13-32208 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 68.7K | 282K | Nov 2011 – May 2019 |
| L-D Unit O-13-25525 | Avad Operating, LLC only | Bee-Son (Viola) | Clay | 4 | 67.6K | 68.3K | Jan 1993 – May 2018 |
| Brown, J. N. O-13-30560 | Tatanka Operating, LLC only | Gordonville, West (Viola) | Grayson | 1 | 65.3K | 260K | Oct 2005 – Nov 2025 |
| Hudgins O-13-33947 | Kornye-Tillman Company only | Southmayd, North (Baker-Viola) | Grayson | 1 | 65.2K | 272K | Jul 2019 – Jul 2026 |
| Poet O-13-28149 | Little, Quintin Company,inc.,the only | Southmayd, North (Baker-Viola) | Grayson | 2 | 65.2K | 74.8K | Jan 1993 – Jul 2026 |
| Gatlin (V) O-13-33085 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 64.9K | 116K | Oct 2013 – Jul 2026 |
| Bar-S O-13-28795 | Felderhoff Production Company only | Southmayd, North (Baker-Viola) | Grayson | 1 | 64.7K | 91K | Jun 1994 – Dec 2014 |
| Wilson, Viola O-1-5566 | Tex-Lee Operating Company only | Smithville (Austin Chalk) | Fayette | 1 | 64.4K | 46.1K | Jan 1993 – Jul 2026 |
| Logston-Cantrell Unit O-13-25959 | Charter Oak Production Co., LLC only | Southmayd, North (Baker-Viola) | Grayson | 1 | 63.5K | 70.4K | Jan 1993 – Mar 2024 |
| Everett Unit O-13-33617 | EOG Resources, Inc. only | Wales (Viola) | Montague | 1 | 63.4K | 648K | Dec 2014 – Jul 2026 |
| Webb-Brown O-13-27718 | Charter Oak Production Co., LLC only | Southmayd, North (Baker-Viola) | Grayson | 1 | 63.3K | 75.3K | Jan 1993 – Jul 2026 |
| Logston-Klas O-13-24608 | Charter Oak Production Co., LLC only | Southmayd, North (Baker-Viola) | Grayson | 1 | 59.2K | 143K | Jan 1993 – Feb 2024 |
| Gibbons O-13-28554 | Brammer Petroleum, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 58.4K | 81.3K | Apr 1993 – Jul 2026 |
| Duncan O-13-13561 | Stephens & Johnson Operating Co. only | Bowie, NE. (Viola) | — | 1 | 55.3K | 211K | Jan 1993 – Jul 2026 |
| Wales O-13-12572 | Willowbend Investments, Inc. only | Wales (Viola) | — | 1 | 53.6K | 9.58K | Jan 1993 – Jul 2026 |
| Blacknall, J. C. O-4-8043 | XOG Operating LLC only | Viola (4270) | — | 1 | 53.4K | 5.39K | Jan 1993 – Jul 2026 |
| Q. Little O-13-30686 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 52.5K | 2.18M | Feb 2006 – Jul 2026 |