| Slator Ranch G-4-281261 | Stirling (Wilcox Consolidated) | Zapata | 1 | 6.14K | 356K | Jul 2016 – Apr 2026 |
| Slator Ranch G-4-221400 | Las Ovejas (Lobo) | Zapata | 1 | 4.01K | 4.39M | Jun 2006 – Apr 2026 |
| Slator Ranch G-4-223016 | Las Ovejas (Lobo) | Zapata | 1 | 3.46K | 5.57M | Oct 2006 – Apr 2026 |
| Slator Ranch G-4-223025 | Las Ovejas (Lobo) | Zapata | 1 | 3.14K | 3.32M | Nov 2006 – Apr 2026 |
| Slator Ranch G-4-222851 | Las Ovejas (Lobo) | Zapata | 1 | 2.66K | 1.39M | Sep 2006 – Apr 2026 |
| Benavides, B. R. G-4-197941 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 1.05K | 3.2M | Oct 2003 – Apr 2026 |
| Martinez-Uribe G-4-221273 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 865 | 528K | May 2006 – Apr 2026 |
| Slator Ranch G-4-117506 | Las Ovejas (Lobo 3 FB-D) | Zapata | 1 | 399 | 1.16M | Jan 1993 – Apr 2026 |
| Slator Ranch G-4-102724 | Las Ovejas (Lobo 1) | Zapata | 1 | 240 | 189K | Jun 2021 – Apr 2026 |
| Santa Maria Minerals G-4-230340 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 219 | 624K | Jul 2007 – Apr 2026 |
| Slator Ranch G-4-98968 | Las Ovejas (Lobo 3 FB-B) | Zapata | 1 | 215 | 1.18M | Jan 1993 – Apr 2026 |
| Slator Ranch G-4-223001 | Las Ovejas (Lobo) | Zapata | 1 | 134 | 854K | Oct 2006 – Apr 2026 |
| Slator Ranch G-4-219639 | Las Ovejas (Lobo) | Zapata | 1 | 132 | 825K | Apr 2006 – Apr 2026 |
| Martinez, Acela G-4-77343 | J. C. Martin (Lobo) | Zapata | 1 | 127 | 800K | Jan 1993 – Apr 2026 |
| Martinez, Eudoxio Gas Unit G-4-125756 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 105 | 1.72M | Jan 1993 – Apr 2026 |
| Haynes "A" G-4-227884 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 88 | 106K | Jun 2007 – Apr 2026 |
| San Fernando G-4-235508 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 78 | 720K | Feb 2008 – Apr 2026 |
| Haynes "A" G-4-223838 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 68 | 918K | Oct 2006 – Apr 2026 |
| Zachry G-4-223379 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 68 | 2.21M | Aug 2006 – Apr 2026 |
| Santa Maria Minerals G-4-242072 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 60 | 173K | Aug 2008 – Apr 2026 |
| Santa Maria Land G-4-241596 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 55 | 342K | Jun 2008 – Apr 2026 |
| San Fernando G-4-226167 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 47 | 1.46M | Jan 2007 – Apr 2026 |
| Zachry G-4-226969 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 44 | 439K | May 2007 – Apr 2026 |
| Haynes "A" G-4-242001 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 41 | 800K | Aug 2008 – Apr 2026 |
| San Fernando Minerals G-4-128986 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 39 | 253K | Jan 1993 – Apr 2026 |
| Zachry G-4-231854 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 35 | 1.04M | Aug 2007 – Apr 2026 |
| San Fernando G-4-212382 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 32 | 378K | Aug 2005 – Apr 2026 |
| Benavides, B. R. G-4-199681 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 31 | 2.21M | Dec 2003 – Apr 2026 |
| Haynes "A" G-4-243667 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 27 | 1.02M | Nov 2008 – Apr 2026 |
| Lozano G-4-218024 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 26 | 709K | Jan 2006 – Apr 2026 |
| San Fernando Minerals G-4-116782 | San Fernando (Lobo 9600) | Zapata | 1 | 23 | 237K | Jan 1993 – Apr 2026 |
| Haynes "A" G-4-232952 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 22 | 4.26M | Sep 2007 – Apr 2026 |
| Benavides, B. R. G-4-204429 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 22 | 817K | Aug 2004 – Apr 2026 |
| Gutierrez, E. G-4-160510 | Escobas (10,350) | Zapata | 1 | 20 | 2.88M | Sep 1996 – Apr 2026 |
| Zachry G-4-223287 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 19 | 643K | Apr 2006 – Apr 2026 |
| Haynes "A" G-4-226807 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 17 | 1.37M | Apr 2007 – Apr 2026 |
| Haynes "A" G-4-230281 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 14 | 692K | Jun 2007 – Apr 2026 |
| Benavides, B. R. G-4-203831 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 11 | 1.15M | Jul 2004 – Apr 2026 |
| San Fernando Minerals G-4-125447 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 9 | 331K | Jan 1993 – Apr 2026 |
| Haynes "A" G-4-234303 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 8 | 805K | Dec 2007 – Apr 2026 |
| Sanchez, Carmen D. Heirs G-4-128406 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 8 | 855K | Jan 1993 – Apr 2026 |
| Haynes "A" G-4-233108 | Munoz (Lobo) | Zapata | 1 | 7 | 762K | Nov 2007 – Apr 2026 |
| Zachry G-4-241934 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 7 | 719K | Jul 2008 – Apr 2026 |
| Haynes "A" G-4-229411 | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 6 | 2.61M | Jul 2007 – Apr 2026 |
| Zachry G-4-226460 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 6 | 255K | Mar 2007 – Apr 2026 |
| Benavides, B. R. G-4-204242 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 4 | 1.18M | Jul 2004 – Apr 2026 |
| Martinez G-4-215741 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 4 | 768K | Feb 2006 – Apr 2026 |
| Benavides, B. R. G-4-208225 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 4 | 339K | Jan 2005 – Apr 2026 |
| Martinez, Eudoxio Gas Unit G-4-73452 | Cisco-Benavides (Lobo Cons.) | Zapata | 1 | 4 | 4.13M | Jan 1993 – Apr 2026 |
| Benavides, B. R. G-4-211258 | Jennings Ranch (Lobo Cons.) | Zapata | 1 | 4 | 532K | May 2005 – Apr 2026 |