| Harper Ferry 54-4-29 G-10-283225 | Anadarko E&P Onshore LLC only | Phantom (Wolfcamp) | Reeves | 1 | 499K | 2.02M | Mar 2019 – Apr 2026 |
| Harper Allocation A G-1-298943 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 200K | 366K | Dec 2024 – Apr 2026 |
| Harper-Dietze B G-1-298979 | Verdun Oil EF II LLC only | Eagleville (Eagle Ford-1) | La Salle | 1 | 133K | 215K | Dec 2024 – Apr 2026 |
| Harper G-2-212495 | Faulconer Energy, LLC only | Cadence Reliance (Wilcox) | Goliad | 1 | 45.8K | 1.45M | Jul 2005 – Aug 2023 |
| Harper G-2-223733 | Faulconer Energy, LLC only | Charco, SE. (Wilcox 9600) | Goliad | 1 | 26.4K | 1.13M | Nov 2006 – Aug 2023 |
| Bryan-Harper Unit G-3-281037 | Zarvona Energy LLC only | Double a Wells, N (Austin Chalk) | Polk | 1 | 18.1K | 790K | Feb 2013 – Mar 2024 |
| Harper, Carolyn G-13-216580 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 17.7K | 2.22M | Mar 2006 – Apr 2026 |
| Yarborough G-4-233201 | Harper Hefte, Inc. only | Agua Dulce, North (7500) | Nueces | 1 | 10.5K | 518K | Feb 2008 – Jun 2013 |
| Yarborough G-4-247269 | Harper Hefte, Inc. only | Agua Dulce, North (7100 Sand) | Nueces | 1 | 10.3K | 629K | May 2009 – Dec 2016 |
| Harper D Unit G-13-269274 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 8.98K | 927K | Nov 2012 – Jan 2025 |
| Harper C Unit G-13-269399 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 7.62K | 706K | Nov 2012 – Aug 2025 |
| Harper Devonian Unit G-10-195955 | Hilcorp Energy Company only | Harper (Devonian) | Ector | 1 | 4.61K | 1.51M | May 2003 – Sep 2025 |
| Hefte, Mary Tom et Al G-4-169506 | Harper Hefte, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 3.8K | 327K | Jul 1998 – Sep 2017 |
| Harper, R. E. G-6-167532 | Cinron Energy, LLC only | Overton (Cotton Valley Sand) | Smith | 1 | 3.73K | 371K | Sep 1997 – Apr 2026 |
| Harper Devonian Unit G-10-195956 | Hilcorp Energy Company only | Harper (Devonian) | Ector | 1 | 2.05K | 2.02M | May 2003 – Apr 2026 |
| Harper-Knight G-13-238654 | El Reno Energy, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 1.87K | 311K | Apr 2008 – May 2023 |
| Harper-Knight G-13-238653 | El Reno Energy, LLC only | Newark, East (Barnett Shale) | Denton | 1 | 1.74K | 304K | Apr 2008 – May 2023 |
| Harper-Ellison Unit G-13-183198 | Eagleridge Operating, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 1.35K | 667K | Jun 2001 – Mar 2023 |
| Wallace G-2-203067 | Harper Hefte, Inc. only | Mt. Lucas (V-4 Sand) | Live Oak | 1 | 1.19K | 127K | Sep 2004 – Jul 2009 |
| Taylor G-8-141044 | Brazos Operating LLC only | Clyde Harper (Conglomerate) | Palo Pinto | 1 | 1.11K | 282K | Jan 1993 – Mar 2026 |
| Hefte, Mary Tom Trust G-4-173526 | Harper Hefte, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 983 | 147K | Jun 1999 – Dec 2021 |
| Guipel G-14-148785 | Harper Production, LLC only | Skill Again (Lower Morrow -B-) | Ochiltree | 1 | 843 | 221K | Mar 1994 – Apr 2026 |
| Green Miller Unit G-2-147120 | Harper Hefte, Inc. only | Papalote (4680) | Bee | 1 | 782 | 51.7K | Oct 1993 – Aug 1995 |
| Harper "A" G-4-155834 | Conoco Inc. only | Black Creek (Lobo) | Webb | 1 | 368 | 90.8K | Oct 1995 – Aug 1997 |
| W.D. Fowler G-4-280780 | Harper Hefte, Inc. only | Captain Lucey (5430) | Jim Wells | 1 | 238 | 81K | Mar 2016 – Nov 2017 |
| Harper "10" Unit G-8-259871 | Petex only | Lethcoe (Congl.) | Stephens | 1 | 92 | 167K | Apr 2011 – Mar 2022 |
| Fee G-4-33629 | Harper Hefte, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 82 | 165K | Jan 1993 – Jan 2014 |
| Wood, Harper N. G-3-98257 | Wilbanks, Bruce A. Company only | Chapman (Wilcox 9890) | Waller | 1 | 82 | 0 | Jan 1993 – Jun 1993 |
| Carter G-8-142573 | Borderline Operating Corp. only | Clyde Harper (Conglomerate) | Palo Pinto | 1 | 79 | 127K | Jan 1993 – Aug 2011 |
| Harper G-3-159769 | Hollimon Oil Corporation only | El Campo, West (3300) | Wharton | 1 | 73 | 881K | Aug 1996 – Aug 1999 |
| Hefte, Mary Tom et Al G-4-45484 | Harper Hefte, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 58 | 36.3K | Jan 1993 – Jul 1998 |
| Harper G-6-252624 | Craton Operating LLC only | Carthage (Haynesville Shale) | Harrison | 1 | 45 | 1.85M | Sep 2009 – Sep 2017 |
| Palacios G-4-267445 | Harper Hefte, Inc. only | Conception (Tinney) | Duval | 1 | 44 | 60K | Apr 2012 – Jan 2015 |
| Harper, R. E. G-8-155942 | DFG Energy Company LLC only | North Ridge (Duffer) | Eastland | 1 | 30 | 659K | Sep 1995 – Oct 2014 |
| Harper, Bertha F. G-3-36966 | Burk Royalty Co., Ltd. only | Fort Trinidad, W. (Glen Rose B) | Madison | 1 | 29 | 592K | Jan 1993 – Jun 2013 |
| Harper G-3-161506 | Bellows, Dewey Oper. Co., Ltd. only | El Campo, West (3300) | Wharton | 1 | 28 | 570K | Jan 1997 – Dec 2005 |
| Harper Cattle C Unit G-13-252913 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 22 | 2.12M | Aug 2009 – Apr 2026 |
| Wood, Harper N. G-3-94653 | Wilbanks, Bruce A. Company only | Chapman (Wilcox 9890) | Waller | 1 | 19 | 1 | Jan 1993 – Jun 1993 |
| Harper G-3-177243 | Bellows, Dewey Oper. Co., Ltd. only | Alwan (Frio 4860) | Wharton | 1 | 15 | 172K | Apr 2000 – Sep 2004 |
| Furrh-Findley-Harper (AW) G-6-290198 | Sabine Energy Inc. only | Carthage (Haynesville Shale) | Harrison | 1 | 7 | 16.4M | Sep 2020 – Apr 2026 |
| Harper Nej East G-13-238144 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 6 | 750K | Feb 2008 – Apr 2026 |
| Harper Cattle C Unit G-13-243444 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 5 | 2.33M | Dec 2008 – Apr 2026 |
| R.e.(creek) Harper G-8-113414 | Smith Pipe of Abilene only | Harper (Duffer) | Eastland | 1 | 3 | 160K | Jan 1993 – Dec 2000 |
| Hefte, Mary Tom G-4-38327 | Harper Hefte, Inc. only | Agua Dulce (Consolidated Frio) | Nueces | 1 | 2 | 56.9K | Aug 1993 – Jul 2000 |
| Furrh-Elum-Harper (AW) G-6-290162 | Sabine Energy Inc. only | Carthage (Haynesville Shale) | Harrison | 1 | 2 | 7.18M | Sep 2020 – Apr 2026 |
| Harper Nej West G-13-238407 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 1.28M | May 2008 – Apr 2026 |
| Harper Nej West G-13-238095 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 865K | Sep 2007 – Apr 2026 |
| Harper Cattle D G-13-255153 | BKV North Texas, LLC only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 1.17M | Feb 2007 – Apr 2026 |
| Harper Cattle D G-13-214749 | XTO Energy Inc. only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 102K | Oct 2005 – Sep 2009 |
| Harper Cattle E G-13-217213 | XTO Energy Inc. only | Newark, East (Barnett Shale) | Johnson | 1 | 1 | 220K | Jan 2006 – Feb 2010 |