| Vollmert G-14-268640 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 64.3K | 3.46M | Sep 2012 – Apr 2026 |
| Vollmert, J. C. G-14-263761 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 54.7K | 1.38M | May 2011 – Apr 2026 |
| Vollmert "B" SL G-14-265206 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 52.7K | 2.71M | Aug 2011 – Apr 2026 |
| Vollmert G-14-267306 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 38K | 2.63M | Mar 2012 – Apr 2026 |
| Vollmert 'C' G-14-267980 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 36.8K | 645K | May 2012 – Apr 2026 |
| Vollmert "B" G-14-276057 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 36.2K | 2.68M | Aug 2014 – Apr 2026 |
| Vollmert G-14-267983 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 34.1K | 2.51M | Nov 2012 – Apr 2026 |
| Vollmert "C" G-14-244259 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 30.2K | 1.5M | Sep 2008 – Aug 2024 |
| Vollmert "B" G-14-176868 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 28.6K | 1.41M | May 2000 – Apr 2026 |
| Vollmert "C" G-14-241781 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 26.9K | 1.44M | Sep 2008 – Nov 2018 |
| Vollmert, J. C. G-14-267241 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.5K | 769K | Oct 2011 – Apr 2026 |
| Vollmert Trust G-14-266386 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Roberts | 1 | 26.2K | 2.15M | Mar 2012 – Mar 2026 |
| Vollmert "C" G-14-250659 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 24.6K | 1.6M | Feb 2009 – Apr 2026 |
| Vollmert, J. C. G-14-277962 | Mewbourne Oil Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 21.7K | 2.04M | Aug 2015 – Apr 2026 |
| J.C. Vollmert G-14-250682 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 20.3K | 1.11M | May 2009 – Apr 2026 |
| Vollmert Trust SL G-14-246766 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 20K | 1.69M | Jan 2009 – Mar 2026 |
| Vollmert 'B' G-14-208510 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 19.9K | 1.06M | Nov 2004 – Apr 2026 |
| Vollmert, J. C. G-14-220571 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 18.6K | 616K | Sep 2006 – Mar 2024 |
| Vollmert 'C' O-14-9507 | Unit Petroleum Company only | Mendota, NW. (Douglas, Lo.) | Hemphill | 1 | 17.9K | 115K | Dec 2016 – Apr 2026 |
| Vollmert 'C' O-14-9493 | Unit Petroleum Company only | Canadian, SE (Douglas) | Hemphill | 3 | 16.6K | 114K | Oct 2016 – Apr 2026 |
| Vollmert "C" O-14-7779 | Unit Petroleum Company only | Mendota, NW. (Granite Wash, SW.) | Hemphill | 2 | 16.5K | 531K | Jul 2007 – Aug 2008 |
| Vollmert "C" G-14-250845 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 16.2K | 957K | Oct 2007 – Oct 2011 |
| Vollmert "B" O-14-7706 | Unit Petroleum Company only | Mendota, NW. (Granite Wash, SW.) | Roberts | 1 | 15.5K | 201K | Nov 2006 – May 2010 |
| Vollmert O-14-4129 | Unit Petroleum Company only | Mendota, NW. (Douglas, Lo.) | Hemphill | 2 | 15.1K | 444K | Jan 1993 – Jul 2013 |
| Vollmert "C" G-14-259488 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 13.9K | 719K | Apr 2010 – Dec 2024 |
| Vollmert "B" G-14-190963 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 13.8K | 397K | Sep 2002 – Apr 2026 |
| Vollmert G-14-152357 | Apache Corporation only | Red Deer Creek (Granite Wash) | Roberts | 1 | 13.8K | 1.24M | Dec 1994 – Nov 2015 |
| Vollmert "C" G-14-244267 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 13.6K | 812K | Oct 2008 – Apr 2026 |
| Vollmert "C" G-14-233988 | Unit Petroleum Company only | Mendota, NW. (Granite Wash, SW.) | Roberts | 1 | 11.9K | 760K | Jan 2008 – Sep 2016 |
| J. C. Vollmert O-14-7950 | BP America Production Company only | Mendota, NW. (Granite Wash, SW.) | Roberts | 1 | 11.8K | 174K | Dec 2008 – May 2009 |
| Vollmert, J. C. O-14-4563 | Mmgl Txph, LLC only | Mendota, NW. (Douglas, Lo.) | Roberts | 3 | 10.4K | 394K | Jan 1993 – Jun 2014 |
| Vollmert Trust G-14-246765 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Roberts | 1 | 9.91K | 1.26M | Nov 2008 – Mar 2026 |
| Vollmert, J. C. G-14-91910 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 9.78K | 1M | Jan 1993 – Apr 2026 |
| Vollmert "C" G-14-249454 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 9.73K | 1.48M | Nov 2008 – Apr 2026 |
| Vollmert "B" G-14-220083 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 9.48K | 690K | Jun 2006 – Apr 2026 |
| Vollmert "B" G-14-242765 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 8.46K | 492K | Feb 2008 – Jun 2022 |
| Vollmert, J.C. G-14-171855 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 7.7K | 590K | Dec 1998 – Jun 2022 |
| Vollmert -B- G-14-93148 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 5.85K | 446K | Jan 1993 – Sep 2015 |
| Vollmert 'B' SL G-14-276126 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 5.25K | 97.5K | Apr 2014 – Jul 2014 |
| Vollmert Trust G-14-251461 | Bracken Operating, L.L.C. only | Mendota, NW. (Granite Wash) | Roberts | 1 | 4.92K | 322K | Sep 2008 – Feb 2016 |
| Vollmert G-14-238990 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 4.88K | 125K | May 2008 – Sep 2016 |
| Vollmert G-14-213935 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 4.38K | 303K | Sep 2005 – Feb 2016 |
| Vollmert "B" G-14-254700 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 4.29K | 201K | Dec 2009 – Mar 2013 |
| Vollmert "C" G-14-254699 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Hemphill | 1 | 4.19K | 61.3K | Oct 2009 – Oct 2015 |
| Vollmert Trust O-14-7062 | Medallion Production Company only | Red Deer Creek (Granite Wash) | Roberts | 1 | 3.85K | 40.8K | Aug 1995 – May 1996 |
| Vollmert, J. C. G-14-238330 | Unit Petroleum Company only | Mendota, NW. (Granite Wash) | Roberts | 1 | 3.2K | 204K | Jan 2008 – Oct 2014 |
| Vollmert, J.C. G-14-173515 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 2.84K | 389K | Apr 1999 – Jul 2010 |
| Vollmert Trust G-14-158646 | BRG Lone Star Ltd. only | Red Deer Creek (Granite Wash) | Roberts | 1 | 2.8K | 145K | Jun 1996 – Jun 2015 |
| Vollmert G-14-155905 | Apache Corporation only | Red Deer, NE. (Morrow, Up.) | Roberts | 1 | 2.69K | 161K | Sep 1995 – May 2009 |
| Vollmert, J.C. G-14-172703 | Mmgl Txph, LLC only | Mendota, NW. (Granite Wash) | Roberts | 1 | 2.54K | 290K | Mar 1999 – Apr 2026 |