| Webb County School Board #1942-479-42248 | Aldine Oil and Gas LP only | WebbBig Cowboy (Lobo) | ActiveGas | 8,830 | Jan 10, 2013 | 1 | Apr 2026 |
| Webb County School Board #1842-479-42242 | Aldine Oil and Gas LP only | WebbBig Cowboy (Lobo) | ActiveGas | 8,843 | Jan 4, 2013 | 1 | Apr 2026 |
| Webb County School Board #1742-479-42150 | Aldine Oil and Gas LP only | WebbBig Cowboy (Lobo) | ActiveGas | 9,000 | Nov 5, 2012 | 1 | Apr 2026 |
| Dix Ranch - State a #142-479-35476 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,975 | Aug 19, 2008 | 2 | Apr 2026 |
| Hirsch Estate #542-479-39819 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,280 | Apr 30, 2007 | 1 | Jan 2008 |
| Hirsch Estate 857 #442-479-39803 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,996 | Apr 6, 2007 | 1 | Apr 2026 |
| Billings Heirs #542-479-39756 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,400 | Feb 1, 2007 | 1 | Mar 2011 |
| El Gato #3142-479-39674 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 9,200 | Oct 6, 2006 | 1 | Apr 2012 |
| Vaquillas Ranch 3 #342-479-39644 | Three-C Oil and Gas only | WebbBig Cowboy (Lobo) | ActiveGas | 9,125 | Sep 11, 2006 | 1 | Aug 2023 |
| Billings Heirs #442-479-39556 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 8,820 | Jun 27, 2006 | 1 | Feb 2011 |
| El Gato a #2842-479-39322 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 8,450 | Oct 26, 2005 | 1 | Sep 2023 |
| Vaquillas Ranch #942-479-38722 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,700 | May 12, 2004 | 1 | Apr 2026 |
| El Gato #27ST42-479-38688 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 9,100 | Apr 13, 2004 | 2 | Apr 2012 |
| Billings Heirs #342-479-38680 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 9,011 | Apr 5, 2004 | 2 | Apr 2026 |
| El Gato #2642-479-38656 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,800 | Mar 8, 2004 | 1 | Apr 2026 |
| Billings Heirs #242-479-38636 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,650 | Feb 13, 2004 | 1 | Dec 2010 |
| Hirsch Estate 1772 #1142-479-38561 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,722 | Nov 5, 2003 | 1 | Apr 2026 |
| Billings Heirs #142-479-38543 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,850 | Oct 15, 2003 | 1 | Dec 2010 |
| Lincoln Ranch #142-479-38475 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,565 | Jul 15, 2003 | 1 | Apr 2026 |
| Vaquillas Ranch State 1194 #442-479-38437 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 9,455 | May 30, 2003 | 1 | Apr 2026 |
| Hirsch Estate 2094 #1142-479-38350 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,732 | Mar 7, 2003 | 1 | Apr 2026 |
| Culpepper A.B. 2064 #242-479-38244 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,700 | Oct 31, 2002 | 1 | Apr 2026 |
| Hirsch Estate 1772 #1042-479-38148 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,450 | Jun 21, 2002 | 1 | Apr 2026 |
| Culpepper A. B. 2068 #242-479-38122 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,565 | May 24, 2002 | 1 | Apr 2026 |
| A. V. Norfleet #642-479-38113 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,772 | May 15, 2002 | 1 | Apr 2026 |
| Norfleet A.V. #542-479-38071 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,602 | Mar 14, 2002 | 1 | Apr 2026 |
| Lessor Holding #642-479-38060 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 8,200 | Feb 27, 2002 | 1 | Sep 2005 |
| Roscher-Hirsch G.U. #742-479-38038 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 7,800 | Jan 30, 2002 | 1 | Apr 2026 |
| Culpepper A.B.2068 #142-479-38022 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,550 | Jan 14, 2002 | 1 | Apr 2026 |
| Hirsch Estate 537 #642-479-37992 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,900 | Nov 28, 2001 | 1 | Apr 2026 |
| A.B. Culpepper 2064 #142-479-37985 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,700 | Nov 19, 2001 | 1 | Apr 2026 |
| Hirsch Estate No. 1954 #142-479-37779 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,760 | Apr 11, 2001 | 2 | Apr 2026 |
| Hirsch Estate 537 #442-479-36870 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 9,050 | Mar 15, 2001 | 2 | Sep 2003 |
| Roscher W. C. 518 #642-479-37708 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,300 | Jan 16, 2001 | 1 | Feb 2006 |
| Hirsch Estate 517 #642-479-37698 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 8,800 | Jan 4, 2001 | 1 | Feb 2006 |
| Hirsch State 2072 #642-479-37618 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 8,800 | Sep 26, 2000 | 1 | Dec 2009 |
| Vaquillas Ranch 67 #642-479-37429 | Three-C Oil and Gas only | WebbBig Cowboy (Lobo) | ActiveGas | 9,000 | Feb 8, 2000 | 1 | Apr 2023 |
| Vaquillas Ranch 67 #542-479-37289 | Three-C Oil and Gas only | WebbBig Cowboy (Lobo) | Temporarily abandonedGas | 8,600 | Jun 16, 1999 | 1 | Nov 2009 |
| Norfleet A. V. #442-479-35431 | H & P Exploration Co. only | WebbBig Cowboy (Wilcox 5450) | PluggedGas | 9,800 | Mar 2, 1999 | 3 | May 2000 |
| Webb County School Board #242-479-32837 | Proline Energy Resources Inc only | WebbMancho Prado (L-1) | ActiveGas | 9,200 | Dec 10, 1998 | 2 | Dec 2024 |
| Abe Lincoln GU a #342-479-37114 | Bluestone Natural Res. II LLC only | WebbBig Cowboy (Lobo) | PluggedGas | 8,900 | Sep 29, 1998 | 1 | Aug 2013 |
| Hirsch Estate 537 #542-479-37073 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 9,300 | Aug 21, 1998 | 1 | Apr 2026 |
| Dix Ranch a #142-479-35296 | Conocophillips Company only | WebbBig Cowboy (Wilcox 6000) | PluggedGas | 9,300 | Jul 28, 1998 | 3 | Oct 2000 |
| Schwarz-State B #342-479-36926 | Bluestone Natural Res. II LLC only | WebbBig Cowboy (Lobo) | PluggedGas | 8,730 | Jun 24, 1998 | 2 | Aug 2013 |
| Williamson Stanley H. #442-479-36955 | EOG Resources Inc. only | WebbBig Cowboy (Lobo) | PluggedGas | 8,750 | May 8, 1998 | 1 | Oct 2011 |
| Williamson Stanley H. #542-479-36947 | Blackbeard Operating LLC only | WebbBig Cowboy (Lobo) | PluggedGas | 8,900 | Apr 28, 1998 | 1 | Aug 2013 |
| Hirsch Estate 2071 #742-479-36849 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 9,400 | Jan 7, 1998 | 1 | Apr 2001 |
| Roscher W.C. 518 #542-479-36810 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 8,550 | Nov 10, 1997 | 1 | Apr 2026 |
| Hirsch State 2072 #442-479-36808 | Hilcorp Energy Company only | WebbBig Cowboy (Lobo) | ActiveGas | 9,000 | Nov 7, 1997 | 1 | Apr 2026 |
| Hirsch Estate 54 #242-479-36771 | Conocophillips Company only | WebbBig Cowboy (Lobo) | PluggedGas | 8,900 | Oct 2, 1997 | 1 | Mar 2000 |