| Shanafelt Trust O-13-27745 | Western Chief Operating, L.L.C. | Box (Mississippi) | Jack | 1 | 254K | 171K | Jan 1993 – Jul 2026 |
| Houston O-13-28731 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 2 | 138K | 120K | Jan 1994 – Jul 2026 |
| Blocker O-13-28777 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 2 | 115K | 137K | Apr 1994 – Jul 2026 |
| McDonald O-13-28779 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 2 | 106K | 117K | Apr 1994 – Jul 2014 |
| Taylor, Daisy O-13-28750 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 1 | 102K | 93.3K | Mar 1994 – Feb 2012 |
| Shanafelt O-13-20927 | Western Chief Operating, L.L.C. | Young County Regular | Young | 1 | 11.5K | 18 | Jan 1993 – Jul 2026 |
| Haney 2 O-9-17466 | Western Chief Operating, L.L.C. | Arden, S. (Canyon Sd.) | Irion | 1 | 8.84K | 36.7K | Mar 2010 – Jan 2016 |
| Bird O-13-25095 | Western Chief Operating, L.L.C. | TJN (Strawn) | Jack | 1 | 7.89K | 98.8K | Jan 1993 – May 2009 |
| Hopkins O-13-29342 | Western Chief Operating, L.L.C. | Park Springs (Congl.) | Montague | 2 | 3.71K | 375K | Jun 1997 – Jul 2026 |
| Mosley, Pearl "A" O-13-25110 | Western Chief Operating, L.L.C. | Bryson, East | Jack | 1 | 2.9K | 20 | Jan 1993 – Jul 2009 |
| Keyser "G" O-13-24456 | Western Chief Operating, L.L.C. | Young County Regular | Young | 1 | 2.87K | 17 | Jan 1993 – Jul 2026 |
| King, B. W. O-13-18963 | Western Chief Operating, L.L.C. | Young County Regular | — | 1 | 2.47K | 19 | Jan 1993 – Jul 2026 |
| Kemp-Derrick Unit O-13-30070 | Western Chief Operating, L.L.C. | Matlock | Jack | 1 | 1.48K | 0 | Aug 2002 – Mar 2008 |
| King "A" O-13-21770 | Western Chief Operating, L.L.C. | Young County Regular | Young | 1 | 839 | 18 | Jan 1993 – Jul 2026 |
| Brice O-13-23243 | Western Chief Operating, L.L.C. | Brice (Conglomerate) | Jack | 1 | 553 | 141K | Jan 1993 – Jun 2010 |
| Keyser "C" O-13-21591 | Western Chief Operating, L.L.C. | Brazeel (Mississippian) | Young | 1 | 258 | 0 | Jan 1993 – Jul 2026 |
| King, B. W. O-13-20074 | Western Chief Operating, L.L.C. | Graham, East (Congl.) | Young | 1 | 234 | 0 | Jan 1993 – Jul 2026 |
| Keyser "A" O-13-20834 | Western Chief Operating, L.L.C. | Young County Regular | Young | 1 | 88 | 6 | Jan 1993 – Jul 2026 |
| Hila Keyser O-13-30199 | Western Chief Operating, L.L.C. | Blount (Buttram) | — | 1 | 13 | 0 | Jul 2003 – Jul 2026 |
| Schertz G-13-215387 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Denton | 1 | 0 | 15.8K | Nov 2005 – Jun 2008 |
| McCutchin G-13-219498 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 703K | Oct 2005 – Feb 2013 |
| Verstraete-Burgoyne Unit G-13-219506 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 378K | Feb 2006 – Dec 2014 |
| McCutchin G-13-219513 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 767K | Sep 2005 – Nov 2012 |
| Cooper G-13-225975 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 113K | Aug 2006 – Oct 2009 |
| Eagle Farms G-13-228798 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Denton | 1 | 0 | 94K | Jan 2007 – Dec 2009 |
| Bergman G-13-230544 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 225K | Jan 2007 – Jun 2010 |
| Spinler G-13-232880 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 50.9K | Oct 2006 – May 2009 |
| Paschal-Harrison Unit G-13-232994 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 139K | Mar 2007 – Apr 2012 |
| Smith-Evans Unit G-13-234609 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 263K | Mar 2007 – Jan 2013 |
| Schertz G-13-236140 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Denton | 1 | 0 | 42.7K | Jan 2007 – Oct 2009 |
| Crosslin Unit G-13-238399 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Parker | 1 | 0 | 255K | Nov 2006 – Jan 2013 |
| McCutchin G-13-247971 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 39.4K | Feb 2008 – Mar 2010 |
| McCutchin G-13-250176 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Johnson | 1 | 0 | 613K | Jan 2008 – Jun 2013 |
| Eagle Farms G-13-251484 | Western Chief Operating, L.L.C. | Monteath (Atoka, Upper) | Denton | 1 | 0 | 128K | Jul 2009 – Jan 2013 |
| Bastian G-13-254715 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Wise | 1 | 0 | 399K | Oct 2009 – Mar 2013 |
| Pierce R.N. G-8-58811 | Western Chief Operating, L.L.C. | Ringo (Congl.) | — | 1 | 0 | 119K | Jan 1993 – Jul 2026 |
| Shanafelt Trust O-13-21902 | Western Chief Operating, L.L.C. | Jack County Regular | Jack | 2 | 0 | 0 | Jan 1993 – Jul 2026 |
| Mosley, Pearl "A" O-13-23986 | Western Chief Operating, L.L.C. | Jack County Regular | Jack | 1 | 0 | 0 | Jan 1993 – Oct 2009 |
| McDonald G-13-270456 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 1 | 0 | 19.5K | Oct 2012 – Jul 2026 |
| Pierce, R.N. G-8-116034 | Western Chief Operating, L.L.C. | Ringo (Cong.upper) | Palo Pinto | 1 | 0 | 0 | Jan 1993 – Nov 2011 |
| Pierce, R. N. G-8-262216 | Western Chief Operating, L.L.C. | Palo Pinto County Regular | Palo Pinto | 1 | 0 | 6.37K | Nov 2011 – Jul 2026 |
| Keyser, Hila -A- G-13-69542 | Western Chief Operating, L.L.C. | Young County Regular (Gas) | Young | 1 | 0 | 0 | Jan 1993 – Oct 2020 |
| Keyser "B" G-13-104487 | Western Chief Operating, L.L.C. | Young County Regular | Young | 1 | 0 | 0 | Jan 1993 – Oct 2020 |
| Mosely, Pearl "A" G-13-137582 | Western Chief Operating, L.L.C. | Pearl (Basil) | Jack | 1 | 0 | 22.5K | Jan 1993 – Feb 2009 |
| Shanafelt Trust G-13-141458 | Western Chief Operating, L.L.C. | Jack County Regular | Jack | 1 | 0 | 111K | Jan 1993 – Jul 2026 |
| McDonald Unit G-13-152417 | Western Chief Operating, L.L.C. | Wise County Regular | Wise | 1 | 0 | 0 | Dec 1994 – Sep 2025 |
| Houston G-13-159297 | Western Chief Operating, L.L.C. | Wise County Regular | Wise | 1 | 0 | 21.1K | May 1996 – Feb 2019 |
| Blocker G-13-174154 | Western Chief Operating, L.L.C. | McCutchin (Ellenburger) | Wise | 1 | 0 | 247K | Aug 1999 – Jul 2026 |
| Poe-Mann G-13-188543 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Denton | 1 | 0 | 1.8M | Nov 2001 – Jul 2026 |
| Poe-Mann G-13-188544 | Western Chief Operating, L.L.C. | Newark, East (Barnett Shale) | Denton | 1 | 0 | 1.54M | Jan 2002 – Jul 2026 |