| KMF-80 O-4-12173 | Sarita Energy Resources, Ltd. | EL Anzuelo (Marg A) | 2 | 1.36M | 869K | Feb 1993 – Jul 2026 |
| State Tract 323 O-4-12193 | Sarita Energy Resources, Ltd. | EL Anzuelo (Marg A) | 2 | 491K | 1.04M | Mar 1993 – Jul 2026 |
| Kenedy, John G. Jr. "C" O-4-13914 | Headington Energy Partners, LLC | Mifflin (F-0103) | 4 | 282K | 348K | Mar 2014 – Jul 2026 |
| Sarita Field Oil & Gas Unit O-4-10263 | Exxon Mobil Corporation | Sarita (5-Q, SW) | 3 | 266K | 122K | Jan 1993 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-9310 | Exxon Mobil Corporation | Sarita (6-B) | 8 | 248K | 119K | Jan 1993 – Dec 2010 |
| East, S.K. Mrs. O-4-13812 | Headington Energy Partners, LLC | Rita (Consolidated) | 26 | 214K | 1.32M | Feb 2014 – Jul 2026 |
| Sarita Field Oil & Gas Unit O-4-11471 | Exxon Mobil Corporation | Sarita (5-C, SW) | 1 | 194K | 69K | Jan 1993 – Oct 2010 |
| KMF 301 O-4-13828 | Sarita Energy Resources, Ltd. | EL Anzuelo (Marg A) | 2 | 186K | 647K | May 2013 – Jul 2026 |
| Erck O-4-12157 | Pioneer Natural Res. USA, Inc. | McGill (7810) | 2 | 161K | 696K | Jan 1993 – Jun 2005 |
| Sarita Field Oil & Gas Unit O-4-13623 | Headington Energy Partners, LLC | Sarita Shallow (Mio-Frio Cons.) | 43 | 158K | 262K | Sep 2010 – Jul 2026 |
| Kenedy, John G., Jr. "E" O-4-10363 | Exxon Mobil Corporation | Sarita (5-L&m,sw) | 2 | 142K | 104K | Jan 1993 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-6965 | Exxon Mobil Corporation | Sarita ( 5-KLM, C) | 12 | 138K | 144K | Jan 1993 – Oct 2010 |
| Erck O-4-12170 | Pioneer Natural Res. USA, Inc. | McGill (8260 Upper) | 1 | 137K | 420K | Jan 1993 – Jul 2005 |
| Sarita Field, Oil & Gas Unit O-4-10436 | Exxon Mobil Corporation | Sarita ( 6-A) | 3 | 122K | 55.9K | Jan 1993 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-11617 | Exxon Mobil Corporation | Sarita ( 5-P) | 6 | 108K | 118K | Jan 1993 – Oct 2010 |
| Erck O-4-11371 | Pioneer Natural Res. USA, Inc. | McGill (8260 Frio) | 3 | 96.3K | 188K | Jan 1993 – Apr 2004 |
| Armstrong, Charles M. O-4-13273 | Headington Energy Partners, LLC | Candelaria (Consolidated) | 3 | 94.3K | 673K | Dec 2004 – Jul 2026 |
| Sarita Field Oil & Gas Unit O-4-11702 | Exxon Mobil Corporation | Sarita (6-D) | 4 | 81.8K | 43.4K | Jan 1993 – Oct 2010 |
| Sarita FLD Oil & Gas Unit O-4-10815 | Exxon Mobil Corporation | Sarita (6-C) | 3 | 79.9K | 174K | Jan 1993 – Dec 2010 |
| Sarita Field Oil & Gas Unit O-4-6091 | Exxon Mobil Corporation | Sarita ( 9-B) | 2 | 75.3K | 70.9K | Jan 1993 – Oct 2010 |
| Kenedy, John G., Jr."e" O-4-13625 | Headington Energy Partners, LLC | Sarita Shallow (Mio-Frio Cons.) | 3 | 58.9K | 75.3K | Sep 2010 – Jul 2026 |
| Armstrong, Charles M. O-4-13139 | Headington Oil Company, L.P. | Candelaria (G-11) | 1 | 57.8K | 238K | Apr 2002 – Feb 2005 |
| Kenedy, John G. Jr. 'C' O-4-13915 | Headington Energy Partners, LLC | Mifflin (G-73) | 1 | 49.4K | 223K | Mar 2014 – Jul 2026 |
| Sarita Field Oil & Gas Unit O-4-12733 | Exxon Mobil Corporation | Sarita ( 5-D) | 2 | 46.4K | 49.1K | Dec 1997 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-6964 | Exxon Mobil Corporation | Sarita ( 5-G & H, E) | 4 | 44.2K | 64.2K | Jan 1993 – Aug 2007 |
| East, S. K. Mrs. O-4-8617 | Headington Oil Company LLC | Rita (5-I, W) | 6 | 42.6K | 143K | Jan 1993 – May 2014 |
| Sarita Field Oil & Gas Unit O-4-12061 | Exxon Mobil Corporation | Sarita (14-E, E) | 1 | 40.8K | 74.6K | Jan 1993 – Jul 2006 |
| East, S. K., Mrs. O-4-8747 | Headington Oil Company LLC | Rita ( 4-R-III) | 5 | 39K | 47.5K | Jan 1993 – May 2014 |
| Erck O-4-13015 | Pioneer Natural Res. USA, Inc. | McGill (8130) | 1 | 29.7K | 85.3K | Mar 2001 – Jul 2005 |
| Sarita Field Oil & Gas Unit O-4-6967 | Exxon Mobil Corporation | Sarita ( 7-B, E) | 4 | 29K | 26.3K | Jan 1993 – Oct 2010 |
| East, S.K. Mrs. O-4-10336 | Headington Oil Company LLC | Rita (5-M, Seg. II) | 2 | 28.9K | 54K | Jan 1993 – Jan 2014 |
| Sarita Field Oil & Gas Unit O-4-11710 | Exxon Mobil Corporation | Sarita (6-a, C) | 1 | 28.1K | 68.3K | Jan 1993 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-10262 | Exxon Mobil Corporation | Sarita (5-G & H, SW) | 2 | 27.8K | 17.4K | Jan 1993 – Oct 2010 |
| Sarita Field Oil & Gas Unit O-4-12999 | Exxon Mobil Corporation | Sarita (7-F) | 2 | 23.9K | 16.5K | Nov 2000 – Oct 2010 |
| East, Mrs. S. K. O-4-11909 | Headington Oil Company LLC | Rita (5-M, North) | 1 | 22.8K | 106K | Jan 1993 – Jan 2014 |
| Armstrong, C. M. O-4-7553 | Headington Oil Company, L.P. | Candelaria (I-60 Sand) | 2 | 22.5K | 60.8K | Jan 1993 – Nov 2004 |
| East, Mrs. S. K. O-4-10134 | Headington Oil Company LLC | Rita (10-A,ii) | 1 | 21.6K | 49.3K | Jan 1993 – Jan 2014 |
| Erck O-4-12158 | Parker & Parsley Development L.P | McGill (Frio 8660) | 1 | 20.5K | 48.4K | Jan 1993 – Oct 1994 |
| Sarita Field Oil & Gas Unit O-4-6963 | Exxon Mobil Corporation | Sarita ( 3-E) | 11 | 19.5K | 33K | Jan 1993 – Oct 2010 |
| Yturria L & C Co. NCT-1 O-4-12070 | Cody Energy LLC | Raymondville (a- 4A) | 2 | 17.7K | 22.2K | Jan 1993 – Mar 2002 |
| East, S. K. Mrs. O-4-8423 | Headington Energy Partners, LLC | Rita (5-D & E) | 5 | 17.4K | 14.2K | Jan 1993 – Feb 2015 |
| Sarita Field Oil & Gas Unit O-4-9537 | Exxon Corp. | Sarita (6-a, W) | 2 | 15.6K | 48.1K | Jan 1993 – Sep 1998 |
| Yturria, L.&c. Co. NCT-1 O-4-6487 | Cody Energy LLC | Cabazos (LM-18) | 2 | 14.8K | 77.4K | Jan 1993 – Jun 2001 |
| East, Mrs. S. K. O-4-12052 | Headington Oil Company LLC | Rita (7-A) | 1 | 14.4K | 21.1K | Jan 1993 – Jan 2014 |
| Sarita Field O&G Unit O-4-13596 | Newfield Exploration Company | Sarita Shallow (Mio-Frio Cons.) | 1 | 14.4K | 759K | Feb 2010 – Mar 2014 |
| State Tract 323 O-4-12288 | Sarita Energy Resources, Ltd. | Potrero Lopena, SW. (7390) | 2 | 12.6K | 62.6K | Dec 1993 – Jan 2012 |
| Sarita Field Oil & Gas Unit O-4-11601 | Exxon Mobil Corporation | Sarita (6-H) | 3 | 12.3K | 66.1K | Jan 1993 – Jun 2000 |
| Erck O-4-12369 | Parker & Parsley Producing L.P. | McGill (8325) | 1 | 10.5K | 83.7K | Aug 1994 – Jan 1997 |
| East, S. K., Mrs. O-4-7208 | Headington Oil Company LLC | Rita ( 6-F-III) | 2 | 10.5K | 6.8K | Jan 1993 – Jan 2014 |
| Armstrong, Tobin O-4-14172 | Headington Energy Partners, LLC | Candelaria (Consolidated) | 2 | 10.2K | 20.4K | Aug 2021 – Jul 2026 |