| Gregory G-6-222511 | Stroud Petroleum, Inc. only | Stamps (Travis Peak) | Upshur | 1 | 36.2K | 1.95M | Aug 2006 – Apr 2026 |
| Gregory G-3-112109 | Leexus Oil LLC only | Giddings (Austin Chalk, Gas) | Fayette | 1 | 26K | 764K | Jan 1993 – Apr 2026 |
| Gregory G-6-231252 | Stroud Petroleum, Inc. only | Stamps (Travis Peak) | Upshur | 1 | 23.5K | 886K | Jul 2007 – Nov 2023 |
| Gregory G-6-202943 | Stroud Petroleum, Inc. only | Stamps (Travis Peak) | Upshur | 1 | 21.4K | 774K | Jun 2004 – Mar 2024 |
| Arco Fee No. 2 Gas Unit G-3-160440 | Roberson Oil Company only | Highbaugh (Gregory) | Tyler | 1 | 16.9K | 133K | Apr 1996 – Jun 2000 |
| Gregory Unit G-13-279981 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 11.2K | 681K | Dec 2013 – Apr 2026 |
| Dugat Unit G-4-163897 | National Energy Group, Inc. only | Gregory, NW (F-10) | San Patricio | 1 | 10.6K | 181K | Mar 1997 – Dec 1997 |
| Gregory Unit G-13-273645 | Scout Energy Management LLC only | Newark, East (Barnett Shale) | Montague | 1 | 9.19K | 1.11M | Apr 2014 – Apr 2026 |
| Gregory G-6-245192 | Stroud Petroleum, Inc. only | Stamps (Travis Peak) | Upshur | 1 | 5.79K | 215K | Jan 2009 – Feb 2024 |
| Gregory, Charles F. Gas Unit G-5-128591 | Alaron Energy, Inc. only | Cheneyboro, SW. (9585) | Navarro | 1 | 5.62K | 80.6K | Jan 1993 – Oct 2017 |
| Gregory Unit G-13-273646 | Scout Energy Management LLC only | Newark, East (Barnett Shale) | Montague | 1 | 4.77K | 229K | Apr 2014 – Apr 2026 |
| Gregory Unit G-4-102784 | Miramar Petroleum, Inc. only | Shepherd, S. (Frio) | Hidalgo | 1 | 4.21K | 1.55M | Jan 1993 – Feb 1999 |
| Gregory Unit G-13-279986 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 3.93K | 1.13M | Dec 2013 – Apr 2026 |
| Gregory, A.G. GU 1 G-6-154847 | Faulconer Energy, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 2.73K | 1.36M | Apr 1995 – Apr 2026 |
| Gregory G-13-117972 | Briar Energy Corporation only | Risch, East (Caddo Congl.) | Wise | 1 | 1.97K | 199K | Jan 1993 – Jun 2023 |
| Gregory, A.G. GU 1 G-6-152912 | Faulconer Energy, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.77K | 1.12M | Dec 1994 – Apr 2026 |
| Gregory, A.G. GU 1 G-6-119397 | Faulconer Energy, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.66K | 1.46M | Jan 1993 – Apr 2026 |
| Dugat G-4-182954 | Ampak Oil Company only | Gregory, East (Frio, Upper) | San Patricio | 1 | 1.61K | 30.7K | Apr 2001 – Jun 2002 |
| Gregory, A.G. GU 1 G-6-177849 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.59K | 909K | May 2000 – Oct 2025 |
| Gregory, A.G. GU 1 G-6-179018 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.24K | 578K | Jul 2000 – Apr 2019 |
| Gregory, A.G. GU 1 G-6-178523 | TGNR East Texas II LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 843 | 633K | Jun 2000 – Feb 2020 |
| Gregory, A.G. GU 1 G-6-86580 | Faulconer Energy, LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 763 | 707K | Jan 1993 – Apr 2026 |
| Mathis-Gregory G-13-29128 | Eagleridge Operating, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 545 | 219K | Jan 1993 – Nov 2021 |
| Gregory Family Unit G-13-252730 | Diversified Production LLC only | Newark, East (Barnett Shale) | Somervell | 1 | 467 | 304K | Oct 2009 – May 2019 |
| Gregory, W. J. G-13-66033 | Somerset Operating, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 285 | 335K | Jan 1993 – Feb 2026 |
| Gregory Family Unit G-13-258670 | Diversified Production LLC only | Newark, East (Barnett Shale) | Somervell | 1 | 224 | 783K | Dec 2010 – Apr 2026 |
| Dugat Unit G-4-163901 | National Energy Group, Inc. only | Gregory, NW (Floerke C) | San Patricio | 1 | 206 | 22.1K | Mar 1997 – Jun 1997 |
| Gregory Family Unit G-13-258668 | Diversified Production LLC only | Newark, East (Barnett Shale) | Somervell | 1 | 200 | 1.12M | Dec 2010 – Dec 2025 |
| Gregory "6" G-8-140844 | Southwest Gas Systems, Inc. only | Heidenreich (Upper Marble Falls) | Brown | 1 | 185 | 37.7K | Jan 1993 – Jun 2019 |
| Gregory Family Unit G-13-257583 | Diversified Production LLC only | Newark, East (Barnett Shale) | Somervell | 1 | 162 | 806K | Dec 2010 – Apr 2026 |
| Moore, W. H. G-4-138970 | Dreyfus, Louis Natural Gas Corp only | Gregory, North (Watson) | San Patricio | 1 | 128 | 11.8K | Jan 1993 – Jun 1993 |
| Gregory "A" G-6-191432 | Petralis Energy Resources, LLC only | Tennessee Colony (CV-Bossier) | Anderson | 1 | 122 | 3.65M | May 2002 – Mar 2026 |
| Gregory Shallow Unit G-4-102680 | Miramar Petroleum, Inc. only | Shepherds (Frio 7400) | Hidalgo | 1 | 119 | 14.8K | May 1999 – Jun 2003 |
| Gregory "A" G-6-194475 | Petralis Energy Resources, LLC only | Tennessee Colony (CV-Bossier) | Anderson | 1 | 98 | 1.07M | Apr 2003 – Mar 2026 |
| Dugat G-4-170482 | Ampak Oil Company only | Gregory, NW (F-10) | San Patricio | 1 | 94 | 39.6K | Mar 1998 – Jul 2000 |
| Gregory "A" G-6-193410 | Petralis Energy Resources, LLC only | Tennessee Colony (CV-Bossier) | Anderson | 1 | 51 | 586K | Feb 2003 – Mar 2026 |
| Rawdon, Gregory G-13-262584 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 46 | 2.23M | Jul 2011 – Apr 2026 |
| Gregory, Bennett G-13-202980 | XTO Energy Inc. only | Newark, East (Barnett Shale) | Tarrant | 1 | 8 | 67.1K | Jul 2004 – Oct 2005 |
| Gregory Crawford GU G-8-139736 | Richey, Ray Management Co., Inc. only | Rife (Congl. 3900) | Palo Pinto | 1 | 6 | 4.76K | Jan 1993 – Jan 2005 |
| Rawdon, Gregory G-13-262587 | Formentera Operations LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 6 | 1.49M | Jul 2011 – Apr 2026 |
| Strickland, Nancy Jane G-13-104705 | Stephens & Johnson Operating Co. only | Gregory T | Wise | 1 | 1 | 510K | Jan 1993 – Apr 2026 |
| Gregory G-13-286112 | Briar Energy Corporation only | Kenkirk (Strawn 3100) | Wise | 1 | 0 | 4.26K | Feb 2019 – Sep 2021 |
| Hester Gas Unit No. 1 G-4-89702 | Wallis Energy, Inc. only | Gregory, East (8470) | San Patricio | 1 | 0 | 0 | — |
| Gregory G-6-202017 | Stroud Petroleum, Inc. only | Wildcat | Upshur | 1 | 0 | 0 | — |
| Gregory "A" G-6-225096 | Anadarko Petroleum Corporation only | Tennessee Colony (CV-Bossier) | Anderson | 1 | 0 | 0 | — |
| McClellan G-8-81195 | Gregory, J. Russell Inc. only | Brookesmith (Marble Falls Reef) | Brown | 1 | 0 | 19.5K | Jan 1993 – Jan 2004 |
| Zelma Fry Unit G-8-82257 | Gregory, J. Russell Inc. only | Brookesmith (Marble Falls Reef) | Brown | 1 | 0 | 0 | — |
| Greele G-8-83571 | Gregory, J. Russell Inc. only | Brookesmith (Marble Falls Reef) | Brown | 1 | 0 | 0 | — |
| McClellan G-8-88254 | Gregory, J. Russell Inc. only | Brookesmith (Marble Falls Reef) | Brown | 1 | 0 | 0 | — |
| Gregory Heirs Gas Unit G-8-107829 | Regal Petroleum Services only | Gregory (Strawn) | Comanche | 1 | 0 | 0 | — |