| Sheard Gas Unit G-3-174860 | Faulconer, Vernon E., Inc. only | Mott Slough (Yegua) | Wharton | 1 | 76K | 2.63M | Sep 1999 – Jan 2015 |
| Heard Unit G-2-214303 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 61.4K | 3.27M | Jun 2005 – Mar 2020 |
| Heard G-2-209545 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 61K | 2.91M | Jan 2005 – Feb 2016 |
| Heard G-4-180729 | Noble Energy Inc only | Rincon, E. (Deep 8550) | Starr | 1 | 52K | 2.55M | Dec 2000 – Apr 2006 |
| Heard Unit G-13-274008 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Montague | 1 | 38.3K | 943K | Sep 2011 – Aug 2026 |
| Hughes, J. W. FLP G-2-164577 | C & E Operating, Inc. only | Heard Ranch (4800) | Bee | 1 | 24.4K | 283K | Aug 1997 – Oct 1998 |
| Heard G-4-256318 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 23.8K | 803K | May 2010 – Aug 2026 |
| Heard G-4-161039 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 16.1K | 1.58M | Nov 1996 – Aug 2026 |
| Heard Unit G-13-274007 | EOG Resources, Inc. only | Newark, East (Barnett Shale) | Montague | 1 | 15.8K | 319K | Sep 2011 – Apr 2015 |
| Heard, J. F. B. G-2-218347 | Greta Operating Company LLC only | Greta, North (6100) | Refugio | 1 | 14.4K | 317K | Dec 2005 – Oct 2014 |
| Garrett Trust G-6-280103 | Valence Operating Company only | Yantis (Heard Zone) | Wood | 1 | 12.3K | 51.4K | Oct 2015 – Aug 2026 |
| Heard Unit G-2-220593 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 12.1K | 487K | Mar 2006 – Feb 2016 |
| West, T. W. G-4-174277 | Smith Production Inc. only | Tabasco (Heard FB 2) | Hidalgo | 1 | 11.8K | 263K | Aug 1999 – Sep 2000 |
| Heard Gas Unit G-4-134566 | Atlas Operating LLC only | Texan Gardens-Tabasco, N. (Cons) | Hidalgo | 1 | 10.8K | 3.48M | by Jan 1993 – May 2023 |
| Heard, Mrs. Fannie V. W. G-2-180992 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 10.4K | 2.31M | Dec 2000 – May 2004 |
| Foster, Mary Lou Gas Unit G-6-273261 | Valence Operating Company only | Yantis (Heard Zone) | Wood | 1 | 9.91K | 602K | May 2014 – Aug 2026 |
| Heard G-4-202189 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 8.7K | 410K | Jun 2004 – Feb 2015 |
| Heard G-2-244403 | Acock/Anaqua Operating Co., LP only | Refugio Heard (5700) | Refugio | 1 | 8.56K | 131K | Oct 2008 – Feb 2014 |
| Heard G-4-228691 | Orx Resources, L.L.C. only | CD Nabors (Vicksburg) | Starr | 1 | 7.53K | 374K | May 2007 – Apr 2018 |
| Heard G-4-245368 | Orx Resources, L.L.C. only | CD Nabors (Vicksburg) | Starr | 1 | 6.56K | 348K | Jan 2009 – Nov 2025 |
| Heard Gas Unit No. 2 G-4-139313 | Kerr-McGee Oil & Gas Onshore LP only | Texan Gardens (L Sand) | Hidalgo | 1 | 6.36K | 1.89M | by Jan 1993 – May 2006 |
| Welder, R J G-2-209782 | Welder Exploration & Prod., Inc. only | Heard Ranch Central (U. Yegua) | Bee | 1 | 6.3K | 231K | Feb 2005 – Jan 2006 |
| Heard Gas Unit 2 G-4-139098 | Kerr-McGee Oil & Gas Onshore LP only | Texan Gardens (L Sand) | Hidalgo | 1 | 6.22K | 1.54M | by Jan 1993 – Nov 2008 |
| Bird, O. R. et Al G-6-280102 | Valence Operating Company only | Yantis (Heard Zone) | Wood | 1 | 6.03K | 41K | Jul 2015 – May 2019 |
| Heard, Mrs. Fannie V. W. G-2-180968 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 5.45K | 1.37M | Dec 2000 – Jan 2005 |
| Heard Gas Unit G-3-107961 | Dynamic Production, Inc. only | Peveto (9600) | Orange | 1 | 5.39K | 122K | by Jan 1993 – May 1998 |
| McDowell, Paul G-6-275679 | Valence Operating Company only | Yantis (Heard Zone) | Wood | 1 | 5.27K | 32.4K | Aug 2014 – Aug 2026 |
| Heard, Mrs. Fannie V. W. G-2-180967 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 4.66K | 1.3M | Dec 2000 – Jan 2005 |
| Morgan, J. C. G-6-116263 | Valence Operating Company only | Yantis (Heard, Up.) | Wood | 1 | 4.24K | 215K | by Jan 1993 – Jun 2007 |
| Heard Gas Unit 2 G-4-221855 | Atlas Operating LLC only | Texan Gardens-Tabasco, N. (Cons) | Hidalgo | 1 | 4.04K | 1.03M | Aug 2006 – Jun 2023 |
| Heard, F. V. W. -B- G-2-92454 | CTR Petroleum, Inc. only | Refugio Heard (6300) | Refugio | 1 | 4.03K | 47.8K | by Jan 1993 – Jul 1994 |
| Heard Unit G-2-213894 | Etoco, L.P. only | Marshall (Middle Wilcox) | Goliad | 1 | 3.43K | 104K | May 2005 – Jan 2006 |
| Foster, Mary Lou G-6-104188 | Valence Operating Company only | Yantis (Heard, Up.) | Wood | 1 | 3.19K | 78.3K | by Jan 1993 – Jul 2001 |
| Heard, Wilson 'A' G-2-121132 | Quintana Pet. Corp. only | Tom Oconnor (5400 Sand) | Refugio | 1 | 2.69K | 72.2K | by Jan 1993 – Apr 1994 |
| Heard Gas Unit G-4-132505 | United Oil & Minerals L. P. only | Texan Gardens (S, West) | Hidalgo | 1 | 2.4K | 1.22M | by Jan 1993 – May 2002 |
| Heard Gas Unit 2 G-4-250554 | Atlas Operating LLC only | Texan Gardens-Tabasco, N. (Cons) | Hidalgo | 1 | 2.06K | 752K | Jul 2009 – Jun 2023 |
| Heard G-2-118423 | Charro Operating, L.L.C. only | Sarco Creek, W. (Frio 4600) | Goliad | 1 | 2.06K | 217K | by Jan 1993 – Oct 1996 |
| Heard, Ira -B- 6600' Sand Unit G-2-107067 | Quintana Pet. Corp. only | Tom Oconnor (6600) | Refugio | 1 | 2.01K | 313K | by Jan 1993 – Sep 1997 |
| Heard G-4-207519 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 2K | 353K | Nov 2004 – Aug 2026 |
| Heard Gas Unit G-4-129407 | Kerr-McGee Oil & Gas Onshore LP only | Texan Gardens (S, West) | Hidalgo | 1 | 1.93K | 1.22M | by Jan 1993 – Aug 2007 |
| Heard, Mrs. Fannie V. W. G-2-180966 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 1.84K | 513K | Dec 2000 – Feb 2001 |
| Heard, Clement G-2-180998 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 1.69K | 672K | Dec 2000 – Feb 2001 |
| Heard G-4-258514 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 1.57K | 21.4K | Jul 2010 – Oct 2014 |
| Heard, Mrs. Fannie V. W. G-2-182046 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 1.5K | 675K | Feb 2001 – Dec 2004 |
| Heard G-4-134042 | Mission River Systems, Inc. only | El Benadito, S. (Vicksburg 9400) | Starr | 1 | 1.45K | 26.5K | by Jan 1993 – Aug 2004 |
| Heard G-4-258166 | Wagner Oil Company only | La Copita (Vicksburg Cons.) | Starr | 1 | 1.38K | 110K | Sep 2010 – Jul 2023 |
| Heard, C.E. "B" G-2-215103 | Lakeshore Operating, LLC only | Heard Ranch (4500) | Bee | 1 | 1.36K | 1.46M | Aug 2005 – Mar 2026 |
| Heard, C. E. "B" G-2-230422 | Lakeshore Operating, LLC only | Heard Ranch (4600) | Bee | 1 | 1.34K | 2.14M | Mar 2007 – Aug 2026 |
| Dougherty G-4-75991 | XTO Energy Inc. only | Penitas (6000 Heard) | Hidalgo | 1 | 1.32K | 466K | by Jan 1993 – Sep 2004 |
| C.E. Heard "B" G-2-230518 | Lakeshore Operating, LLC only | Heard Ranch (4400) | Bee | 1 | 1.29K | 1.8M | Mar 2007 – Aug 2026 |