| Key, Hobart O-7-7558 | Basa Resources, Inc. only | East Texas | Gregg | 19 | 772K | 376K | Jan 1993 – Apr 2026 |
| Key, Dolly Bell O-7-8514 | Linder, John Operating Co., LLC only | East Texas | Gregg | 15 | 757K | 298K | Jan 1993 – Apr 2026 |
| Key, Dolly Bell, Fee O-7-7132 | Smith Resources, L.L.C. only | East Texas | Gregg | 2 | 171K | 137K | Jan 1993 – Apr 2026 |
| Stuckey, Thrasher -B- O-7-7627 | Basa Resources, Inc. only | East Texas | Gregg | 24 | 169K | 156K | Jan 1993 – Apr 2026 |
| Mackey, W. C. O-7-6979 | R2Q Operating LLC only | East Texas | Gregg | 6 | 99K | 8.13K | Jan 1993 – Nov 2025 |
| Mackey, L. L. O-6-14148 | Dallas Production Company LLC only | Willow Springs (Pettit) | Gregg | 2 | 60.9K | 321K | Nov 2001 – Apr 2026 |
| Key O-7-7299 | Smith Resources, L.L.C. only | East Texas | Gregg | 1 | 56.7K | 33.2K | Jan 1993 – Apr 2026 |
| Key, Hobart O-7-7131 | Smith Resources, L.L.C. only | East Texas | Gregg | 2 | 54.7K | 40.7K | Jan 1993 – Apr 2026 |
| Stuckey-Thrasher -A- O-7-7626 | Basa Resources, Inc. only | East Texas | Gregg | 11 | 50.4K | 13.4K | Jan 1993 – Sep 2024 |
| McAfee, Willie G-6-110755 | Silver Oak Operating, LLC only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 39.8K | 413K | Jan 1993 – Apr 2026 |
| Mackey, W D G-6-265638 | Buffco Production Inc. only | Lansing, N. (Cotton Valley, Lo.) | Gregg | 1 | 39.1K | 1.12M | Sep 2012 – Apr 2026 |
| Mackey Heirs G-6-142093 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 35.9K | 1.43M | Jan 1993 – Apr 2026 |
| Mackey Heirs O-6-14357 | Dallas Production Company LLC only | Willow Springs (T.peak Trans.) | Gregg | 1 | 30K | 621K | Nov 2004 – Apr 2026 |
| Mackey Heirs G-6-143362 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 27.7K | 3.63M | Jan 1993 – Nov 2024 |
| Flewellen G-6-98005 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 22.8K | 1.72M | Jul 1993 – Apr 2026 |
| Key, Dolly Bell G-6-230839 | Diversified Production LLC only | White Oak (Cotton Valley Sand) | Gregg | 1 | 22.3K | 563K | Feb 2007 – Apr 2026 |
| Mackey O-6-13672 | O.T. Oil only | Willow Springs (Travis Peak) | Gregg | 1 | 21.3K | 0 | Mar 1997 – Sep 2014 |
| Culpepper G-6-86669 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 19.2K | 1.46M | Jan 1993 – Apr 2026 |
| Stone GU 1-Mackey Heirs (Alloc) G-6-283725 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 17K | 1.9M | Dec 2017 – Apr 2026 |
| Stuckey-Thrasher Gas Unit G-6-148685 | Diversified Production LLC only | White Oak (Cotton Valley Sand) | Gregg | 1 | 15.2K | 2.28M | Jan 1994 – Apr 2026 |
| McKinley, J. C. O-6-13440 | Elms Oil Company only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 14.3K | 20.2K | May 1995 – Apr 2026 |
| Mackey, L. L. O-6-14044 | Buffco Production Inc. only | Willow Springs (Travis Peak) | Gregg | 1 | 13.7K | 70.6K | Oct 2000 – Dec 2015 |
| Mackey Heirs 'J' O-6-15395 | Dallas Production Company LLC only | Willow Springs (T.peak Trans.) | Gregg | 1 | 13.6K | 211K | Jan 2014 – Apr 2026 |
| Mackey Heirs G-6-262654 | Dallas Production Company LLC only | Willow Springs (T.peak Trans.) | Gregg | 1 | 13.6K | 271K | Jun 2011 – Apr 2026 |
| Lee -G- O-6-11772 | Eqv Operating LLC only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 10.4K | 100K | Jan 1993 – Apr 2003 |
| Mackey Heirs G-6-129552 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 10.3K | 1.11M | Jan 1993 – Apr 2026 |
| Mackey Heirs G-6-199064 | Dallas Production Company LLC only | Willow Springs (T.peak Trans.) | Gregg | 1 | 9.38K | 779K | Dec 2003 – Mar 2026 |
| Denson G-6-152630 | Cook Exploration Co. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 9.23K | 792K | Nov 1994 – Jan 2017 |
| Mackey Heirs G-6-142651 | Dallas Production, Inc. only | Willow Springs (Cotton Valley,w) | Gregg | 1 | 8.61K | 1.39M | Jan 1993 – Jul 2010 |
| Mackey Heirs G-6-140216 | Dallas Production Company LLC only | Willow Springs (Cotton Valley) | Gregg | 1 | 8.07K | 1.14M | Jan 1993 – Feb 2011 |
| Mackey Heirs "C" G-6-143041 | Dallas Production, Inc. only | Willow Springs (Cotton Valley) | Gregg | 1 | 7.22K | 779K | Jan 1993 – Jan 2013 |
| Flewellen G-6-90394 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 6.98K | 764K | Jan 1993 – Apr 2023 |
| Mackey, W. C. O-6-11552 | Buffco Production Inc. only | Glenwood (Travis Peak) | Gregg | 1 | 6.94K | 13K | Jan 1993 – Jun 1995 |
| Mackey, L. L. O-6-10480 | Dallas Production, Inc. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 6.41K | 121K | Jan 1993 – May 1998 |
| Mackey, W. C. G-6-181784 | Diversified Production LLC only | Glenwood (Cotton Valley) | Gregg | 1 | 5.7K | 777K | Mar 2001 – Apr 2026 |
| Castleberry G-6-283273 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 5.4K | 570K | Oct 2017 – Apr 2026 |
| Mackey, L. L. G-6-101288 | Buffco Production Inc. only | Willow Springs (Cotton Valley) | Gregg | 1 | 5.32K | 472K | Jan 1993 – Apr 2026 |
| Castleberry G-6-112495 | Forest Oil Corporation only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 5.22K | 135K | Jan 1993 – Jun 2006 |
| Mackey Heirs "A" G-6-137667 | Dallas Production, Inc. only | Willow Springs (Cotton Valley) | Gregg | 1 | 5.03K | 625K | Jan 1993 – Apr 2011 |
| Mackey Heirs G-6-180242 | Dallas Production, Inc. only | Willow Springs (Cotton Valley) | Gregg | 1 | 3.95K | 664K | Oct 2000 – Dec 2013 |
| McLendon, J.A. G-6-173670 | Trivium Operating, LLC only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 3.4K | 172K | Jun 1999 – Feb 2015 |
| Castleberry G-6-287276 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 3.32K | 183K | Jun 2019 – Apr 2026 |
| Castleberry G-6-93294 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 3.06K | 784K | Jan 1993 – Jan 2023 |
| Mackey, W.W. G-6-125780 | Long Trusts, The only | Willow Springs (Cotton Valley) | Gregg | 1 | 3.02K | 480K | Jan 1993 – Mar 2026 |
| Flewellen G-6-283329 | Neches Exploration, L.L.C. only | Willow Springs-Mackey (Tr. Pk.) | Gregg | 1 | 2.73K | 396K | Jun 2017 – Apr 2026 |
| Key, Hobart G-6-182990 | Diversified Production LLC only | Glenwood (Cotton Valley) | Gregg | 1 | 2.58K | 506K | Apr 2001 – Apr 2026 |
| Key, Dolly Bell G-6-160400 | Breitburn Operating L.P. only | White Oak (Cotton Valley Sand) | Gregg | 1 | 2.53K | 1.18M | Aug 1996 – Jan 2022 |
| Stuckey-Thrasher Gas Unit G-6-173003 | Diversified Production LLC only | White Oak (Cotton Valley Sand) | Gregg | 1 | 2.2K | 1.33M | Mar 1999 – Apr 2026 |
| Stuckey-Thrasher Gas Unit G-6-182955 | Diversified Production LLC only | White Oak (Cotton Valley Sand) | Gregg | 1 | 2.13K | 998K | Feb 2001 – Apr 2026 |
| Mackey, L. L. G-6-182032 | Buffco Production Inc. only | Willow Springs (Cotton Valley) | Gregg | 1 | 2.08K | 367K | Mar 2001 – Oct 2023 |