| McCowan Unit O-3-26661 | EOG Resources, Inc. only | Southern Bay (Eagle Ford) | Lee | 2 | 483K | 231K | May 2014 – Jul 2026 |
| Cowan Unit O-6-15266 | Valence Operating Company only | Girlie Caldwell (Goodland LM) | Smith | 1 | 167K | 67.2K | Oct 2013 – Jul 2026 |
| Cowan & McKinney -P- O-13-17788 | Willowbend Investments, Inc. only | Anarene, E. (Miss) | — | 2 | 116K | 1.38K | Jan 1993 – Jul 2026 |
| Cowan-McKinney Unit O-13-15582 | LMH Energy only | Herb (Caddo) | Archer | 9 | 114K | 200K | Jan 1993 – Jul 2026 |
| Cowan-McKinney "GG" O-13-23596 | Willowbend Investments, Inc. only | Archer County Regular | Archer | 3 | 87.6K | 17.8K | Jan 1993 – Mar 2016 |
| Cowan & McKinney -P- O-13-17787 | Willowbend Investments, Inc. only | Anarene, E. (Caddo) | Archer | 2 | 77.2K | 1.38K | Jan 1993 – Jul 2026 |
| Cowan-McKinney/Garvey Unit O-13-28112 | JDL Operating, LLC only | Jefferson, NE. (Caddo Lime) | Archer | 1 | 66.8K | 87.5K | Jan 1993 – Jul 2026 |
| Cowan & McKinney -Y- O-13-18513 | Willowbend Investments, Inc. only | Anarene, E. (Miss) | Archer | 1 | 57.8K | 31.8K | Jan 1993 – Jul 2026 |
| Cowan & McKinney GG O-13-19654 | Willowbend Investments, Inc. only | Lake Kickapoo, E. (Caddo) | Archer | 1 | 54.2K | 40.8K | Jan 1993 – Mar 2016 |
| Cowan-McKinney "B" O-13-22878 | LMH Energy only | Hull-Silk-Sikes (3800) | Archer | 6 | 52.4K | 11.4K | Jan 1993 – Jul 2026 |
| Cowan & McKinney "MM" O-13-21779 | Willowbend Investments, Inc. only | Hull-Silk-Sikes (3800) | Archer | 1 | 45.7K | 31.4K | Jan 1993 – Jul 2026 |
| Cowan, Etal O-6-15158 | Fortune Resources LLC only | Starville, NE. (Pettit) | Smith | 1 | 43.1K | 35.2K | Nov 2012 – Jul 2026 |
| Cowan O-13-29747 | Brower Oil & Gas Co., Inc. only | Cowan Ranch (Canyon Reef) | Baylor | 1 | 35.7K | 0 | Apr 2000 – Jul 2018 |
| Cowan McKinney "R" O-13-28267 | JDL Operating, LLC only | Jefferson, NE. (Caddo Lime) | Archer | 1 | 35.4K | 80.6K | Jan 1993 – Sep 2018 |
| Cowan & McKinney 153 O-13-28739 | Willowbend Investments, Inc. only | Herb (Caddo) | Archer | 1 | 34.7K | 245K | Dec 1993 – May 2017 |
| Cowan, W. T. (D) O-8-28508 | Koko Skadi, LLC only | Burkett, SW. (Duffer) | Coleman | 1 | 32.3K | 96K | Apr 1998 – Jul 2026 |
| Cowan & McKinney -X- O-13-18482 | B.O.L.D. Oil and Gas, LLC only | Anarene, E. (Caddo) | — | 1 | 29.7K | 21 | Jan 1993 – Jul 2026 |
| Cowan O-13-29961 | Brower Oil & Gas Co., Inc. only | Seymour (Miss) | Baylor | 1 | 29.6K | 0 | Nov 2001 – Jan 2006 |
| Cowan O-13-26872 | Canan Operating, Inc. only | Seymour (Caddo) | Baylor | 2 | 28.8K | 193 | Jan 1993 – Jul 2026 |
| Cowan & McKinney 152 O-13-28880 | Willowbend Investments, Inc. only | Herb (Upper Penn.) | Archer | 2 | 27.2K | 677 | Sep 1994 – Jan 2002 |
| Cowan-McKinney -70- O-13-19775 | Hurricane Creek Gas Venture, L.L only | Archer County Regular | Archer | 7 | 26.3K | 20 | Jan 1993 – Jul 2026 |
| Cowan & McKinney O-13-11 | MSB Operating only | Archer County Regular | Archer | 9 | 25.7K | 83 | Jan 1993 – Jul 2026 |
| Cowan O-8-13877 | Koko Skadi, LLC only | Coleman County Regular | Coleman | 1 | 25.4K | 41.9K | Jan 1993 – Jul 2026 |
| McOwan Oil Unit O-6-13915 | Buffco Production Inc. only | Gooch (Pettit) | Harrison | 1 | 25.1K | 148K | Nov 1998 – Oct 2021 |
| Cowan-McKinney -201- O-13-20023 | Hurricane Creek Gas Venture, L.L only | Archer County Regular | Archer | 14 | 23.3K | 21 | Jan 1993 – Jul 2026 |
| Cowan-McKinney O-13-30034 | LMH Energy only | Archer County Regular | Archer | 4 | 22.9K | 0 | Jun 2002 – Jul 2026 |
| Cowan & McKinney 148 O-13-28456 | Willowbend Investments, Inc. only | Hull-Silk-Sikes (3800) | Archer | 1 | 21.2K | 49.1K | Jan 1993 – May 2017 |
| Cowan & McKinney -Q- O-13-17886 | Brigham Oil & Gas, L.P. only | Frarley (Mississippian) | — | 1 | 19.3K | 1.21K | Jan 1993 – Dec 2004 |
| Cowan-McKinney "A" O-13-28185 | Farmer Operating, LLC only | Jean, NW. (Caddo) | Archer | 1 | 19.2K | 21 | Jan 1993 – Jul 2009 |
| Cowan & McKinney -E- O-13-1078 | JDL Operating, LLC only | Jefferson, NE. (Caddo Lime) | Archer | 5 | 18.1K | 11.1K | Jan 1993 – Jul 2026 |
| Cowan & McKinney O-13-29697 | Willowbend Investments, Inc. only | Herb (Caddo) | Archer | 1 | 17K | 262K | Nov 1999 – May 2017 |
| Cowan-McKinney O-13-30521 | LMH Energy only | Hull-Silk-Sikes (3800) | Archer | 1 | 16.2K | 0 | Sep 2005 – Jul 2026 |
| Cowan Ranch "206" O-13-29611 | Verdugo-Pablo Energy, LLC only | Seymour (Caddo) | Baylor | 1 | 15.8K | 0 | Jun 1998 – Nov 2021 |
| Cowan-McKinney O-13-18167 | 5 G Resources, LLC only | Archer County Regular | Archer | 19 | 15.3K | 72 | Jan 1993 – Jul 2026 |
| Cowan O-13-30520 | Brower Oil & Gas Co., Inc. only | Seymour (Caddo) | Baylor | 1 | 14.6K | 0 | Aug 2005 – Jul 2026 |
| Cowan-McKinney 24 O-13-29051 | Elephant Oil & Gas, LLC only | Anarene, E. (Miss) | Archer | 1 | 14.3K | 4.1K | Nov 1995 – Dec 2013 |
| Cowan-McKinney O-13-27686 | Willowbend Investments, Inc. only | Archer County Regular | Archer | 3 | 14K | 78 | Jan 1993 – Mar 2012 |
| Cowan-McKinney -A- O-13-24179 | Willowbend Investments, Inc. only | Archer County Regular | Archer | 4 | 13.6K | 94 | Jan 1993 – Mar 2012 |
| Cowan McKinney "30" O-13-25757 | Wade, Jim only | Archer County Regular | Archer | 2 | 13.4K | 21 | Jan 1993 – Jul 2026 |
| Cowan - McKinney O-13-25100 | Dallas Production Company LLC only | Hull-Silk-Sikes (3800) | Archer | 1 | 12.1K | 143 | Jan 1993 – Mar 2021 |
| Cowan-McKinney -A- O-13-18705 | Rocking, R, Drilling & Prod Co. only | Archer County Regular | Archer | 2 | 11.8K | 21 | Jan 1993 – Jul 2026 |
| Cowan & McKinney -50- O-13-14791 | Genepa Petroleum Company only | Archer County Regular | Archer | 11 | 11.4K | 13 | Jan 1993 – Jul 2026 |
| McCowan Oil Unit O-6-11959 | Apache Corporation only | Gooch (Pettit) | Harrison | 1 | 10.3K | 53.5K | Jan 1993 – Aug 1998 |
| Cowan-McKinney O-13-17446 | Schenk Oil Co. only | Oltex (Canyon, Lower) | — | 2 | 10.1K | 12 | Jan 1993 – Jul 2026 |
| McKinney, Cowan 50 O-13-25917 | Wade, Jim only | Archer County Regular | Archer | 4 | 9.81K | 21 | Jan 1993 – Jul 2026 |
| Cowan Unit O-13-28919 | Sunday Corporation only | Freeport (Mississippi Lime) | Baylor | 1 | 7.98K | 10 | Feb 1995 – May 1999 |
| Cowan "C" O-8-28507 | Koko Skadi, LLC only | Burkett, SW. (Duffer) | Coleman | 1 | 7.41K | 176K | Mar 1998 – Jul 2026 |
| Cowan, C. M. O-1-773 | Production Resources, Inc. only | Kaye (Navarro) | — | 2 | 6.43K | 73 | Jan 1993 – Jul 2026 |
| McKinney, Cowan GMM Project #1 O-13-26174 | Wade, Jim only | Archer County Regular | Archer | 1 | 5.83K | 18 | Jan 1993 – Jul 2026 |
| Cowan, W.T. O-8-16755 | Whiting Oil and Gas Corporation only | Coleman County Regular | Coleman | 2 | 5.82K | 19.4K | Jan 1993 – Jun 2012 |