| Nicholson O-7-7809 | Basa Resources, Inc. only | East Texas | Gregg | 1 | 64.1K | 21 | Jan 1993 – Apr 2026 |
| Nicholson O-1-15876 | Blackbrush O & G, LLC only | Pearsall (Buda Lime) | Frio | 1 | 39.3K | 189K | Aug 2011 – Apr 2026 |
| Nicholson Unit O-1-12754 | Williams, Clayton Energy, Inc. only | Pearsall (Austin Chalk) | Frio | 1 | 39K | 26K | Jan 1993 – May 1998 |
| Nicholson O-14-2532 | Bce-Mach III LLC only | Panhandle Carson County Field | Carson | 11 | 37.4K | 235K | Jan 1993 – May 2020 |
| Nicholson O-6-10741 | Southwest Operating, Inc.-Tyler only | Chapel Hill (Rodessa) | Smith | 1 | 35.7K | 36.6K | Jan 1993 – Aug 2015 |
| Nicholson, John W. Gas Unit G-6-159652 | Merit Energy Company only | Glenwood (Cotton Valley) | Gregg | 1 | 25.9K | 1.42M | Aug 1996 – Mar 2009 |
| Nicholson, John W. Gas Unit G-6-120944 | Merit Energy Company only | Glenwood (Cotton Valley) | Upshur | 1 | 14.3K | 745K | Jan 1993 – Apr 2026 |
| Nicholson, John W. Gas Unit G-6-159549 | Merit Energy Company only | Glenwood (Cotton Valley) | Upshur | 1 | 11.4K | 663K | May 1996 – Apr 2026 |
| Nicholson, F. H. O-1-12685 | McDaniel Company, Inc., The only | Pearsall (Austin Chalk) | Frio | 2 | 11K | 66 | Jan 1993 – Jul 1995 |
| Nicholson Heirs Unit O-1-12373 | Williams, Clayton Energy, Inc. only | Pearsall (Austin Chalk) | Frio | 1 | 10.3K | 21 | Jan 1993 – Oct 1997 |
| Slick, T. B. Estate G-4-191565 | Totalfinaelf E&P USA Inc only | El Ebanito (Nicholson) | Starr | 1 | 10.2K | 782K | Aug 2001 – Aug 2002 |
| Nicholson, John W. Gas Unit G-6-201349 | Merit Energy Company only | Glenwood (Cotton Valley) | Upshur | 1 | 6.81K | 455K | Mar 2004 – Mar 2017 |
| Nicholson, John W. Gas Unit G-6-185165 | Merit Energy Company only | Glenwood (Cotton Valley) | Upshur | 1 | 5.2K | 434K | Aug 2001 – Jun 2017 |
| Nicholson, John W. Gas Unit G-6-169072 | Diversified Production LLC only | Glenwood (Cotton Valley) | Gregg | 1 | 3.08K | 1.01M | May 1998 – Apr 2026 |
| Nicholson O-14-2903 | Wildcat Cement Co. only | Panhandle Wheeler County Field | Wheeler | 4 | 1.75K | 26.7K | Jan 1993 – May 1997 |
| Ramsey-Nicholson O-14-2735 | Rimrock Gas Company only | Panhandle Wheeler County Field | Wheeler | 2 | 1.25K | 8.57K | Jan 1993 – May 1997 |
| Dorothy Nicholson Unit II G-2-143509 | Stallion Oil Company only | Clayton (Massive) | Live Oak | 1 | 978 | 66.5K | Jan 1993 – Jan 1994 |
| Nicholson, W. R., -A- O-4-6926 | Encino Exploration, Inc. only | Nicholson | Webb | 1 | 826 | 51 | Apr 1993 – Sep 1997 |
| Nicholson, Jerome G-13-240987 | Scout Energy Management LLC only | Newark, East (Barnett Shale) | Parker | 1 | 783 | 587K | May 2008 – Apr 2026 |
| Nicholson, Dorothy G-2-149858 | Greater Sooner Holdings, Inc. only | Clayton (Slick 6450) | Live Oak | 1 | 711 | 156K | May 1994 – Feb 2005 |
| Nicholson "A" G-4-158121 | Merritt Operating, Inc. only | Mary Lou Leitch (Lobo) | Webb | 1 | 663 | 94.4K | Dec 1997 – Aug 2012 |
| Nicholson, Clyde G-13-188812 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 655 | 798K | Apr 2002 – Sep 2022 |
| Dorothy Nicholson Unit II G-2-148323 | Kenne Exploration, Inc. only | Clayton (Slick 6450) | Live Oak | 1 | 650 | 202K | Jan 1994 – Mar 2003 |
| Nicholson G-13-189364 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 595 | 740K | Jun 2002 – Nov 2021 |
| Nicholson, Dorothy G-2-163136 | Greater Sooner Holdings, Inc. only | Clayton, NE. (Queen City -C-) | Live Oak | 1 | 561 | 21.8K | May 1997 – Mar 2006 |
| Ramsey-Nicholson -B- O-14-2863 | Rimrock Gas Company only | Panhandle Wheeler County Field | Wheeler | 2 | 516 | 821 | Jan 1993 – Jul 1995 |
| Nicholson G-6-186948 | XTO Energy Inc. only | Huxley (6100) | Shelby | 1 | 509 | 1.49M | May 2001 – Feb 2026 |
| Nicholson, John W. Gas Unit G-6-174305 | Miken Oil, Inc. only | Glenwood (Cotton Valley) | Gregg | 1 | 508 | 608K | Jul 1999 – Apr 2013 |
| Nicholson G-13-199002 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 356 | 1.45M | Sep 2003 – May 2025 |
| Nicholson, Dorothy G-2-131021 | Stallion Oil Company only | Clayton (Wilcox 7360) | Live Oak | 1 | 326 | 35.1K | Jan 1993 – Jan 1994 |
| Briscoe Nicholson G-4-258735 | Tare Resources, LLC only | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 315 | 113K | Nov 2010 – May 2025 |
| Nicholson G-13-188296 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 298 | 903K | Jun 2002 – Nov 2020 |
| Nicholson, John W. Gas Unit G-6-173110 | Miken Oil, Inc. only | Glenwood (Cotton Valley) | Gregg | 1 | 236 | 881K | Mar 1999 – Sep 2012 |
| Nicholson G-13-196241 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 182 | 1.95M | Jun 2003 – Apr 2026 |
| Nicholson G-13-199005 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 73 | 656K | Nov 2003 – Jun 2025 |
| Nicholson G-13-202058 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 66 | 2.02M | May 2004 – Apr 2026 |
| Nicholson G-13-201046 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 37 | 1.1M | Apr 2004 – Sep 2021 |
| Olmitos Ranch, Inc. G-4-93371 | Winchester Production Company only | Nicholson (Lobo 9180) | Webb | 1 | 31 | 0 | Mar 1998 – Mar 1998 |
| Nicholson G-13-195051 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 31 | 1.63M | May 2003 – Dec 2025 |
| Nicholson, Clyde G-13-188811 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 31 | 1.24M | May 2002 – Sep 2022 |
| Nicholson G-2-219495 | Greater Sooner Holdings, Inc. only | Clayton (Mackhank 1) | Live Oak | 1 | 27 | 40.8K | Aug 2005 – Jul 2006 |
| Nicholson G-13-196228 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 25 | 1.4M | Jul 2003 – Apr 2026 |
| Nicholson, John W. Gas Unit G-6-202844 | Diversified Production LLC only | Glenwood (Cotton Valley) | Upshur | 1 | 25 | 103K | Jun 2004 – Dec 2013 |
| Nicholson G-13-188279 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 22 | 515K | Jun 2002 – Jul 2025 |
| Nicholson, Dorothy G-2-148313 | Stallion Oil Company only | Clayton (Mackhank 1) | Live Oak | 1 | 7 | 12.3K | Feb 1994 – May 1994 |
| Nicholson, Dorothy G-2-148214 | Greater Sooner Holdings, Inc. only | Clayton, NE. (1100) | Live Oak | 1 | 2 | 16.2K | Feb 1994 – Jun 2004 |
| Nicholson 16 (AW) G-13-301034 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 0 | 1.18M | Aug 2025 – Mar 2026 |
| Nicholson G-14-26208 | Bce-Mach III LLC only | Panhandle, East | Collingsworth | 1 | 0 | 31.4K | Jan 1993 – Apr 2026 |
| Nicholson G-14-26209 | Bce-Mach III LLC only | Panhandle, East | Collingsworth | 1 | 0 | 72.1K | Jan 1993 – Apr 2026 |
| Nicholson -A- G-14-26210 | Bce-Mach III LLC only | Panhandle, East | Wheeler | 1 | 0 | 136K | Jan 1993 – Apr 2026 |