| Mobil O-10-36461 | Clear Water Inc. only | Abell (Permian-General) | Pecos | 1 | 59.6K | 437K | Nov 2000 – Aug 2026 |
| Chapman Ranch G-4-232247 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 59.1K | 1.47M | Jul 2007 – Apr 2012 |
| Mobil-Eidson "26" O-10-29579 | Rust Oil Corp. only | Mosswell (Strawn 8720) | Ector | 1 | 56.8K | 35.5K | by Jan 1993 – Aug 2005 |
| Chapman Ranch G-4-235046 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 56.5K | 849K | Feb 2008 – Jul 2026 |
| Chapman G-4-196378 | Western Gulf Oil & Gas, LLC only | Mobil-David (Anderson) | Nueces | 1 | 55.4K | 3.73M | Jun 2003 – Nov 2018 |
| McGill Bros. O-4-5140 | Exxon Mobil Corporation only | Kelsey, Deep (Zone 22-A) | Starr | 6 | 55.3K | 138K | by Jan 1993 – Dec 1999 |
| Norman & Prince O-6-1686 | Exxon Mobil Corporation only | Talco | Franklin | 6 | 55K | 23 | by Jan 1993 – Jun 2011 |
| Easterling, H. E. O-6-1711 | Exxon Mobil Corporation only | Talco | Franklin | 5 | 54.9K | 23 | by Jan 1993 – Jun 2011 |
| Mobil-TXL O-9-11018 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Upton | 1 | 54.2K | 148K | by Jan 1993 – Aug 2026 |
| Chapman, J. O. G-4-217866 | Decker Operating Co., L.L.C. only | Mobil-David (Frio 12,600) | Nueces | 1 | 54K | 283K | Dec 2005 – Oct 2016 |
| McPeters, G. A. Act. #2 O-6-1683 | Exxon Mobil Corporation only | Talco | Titus | 6 | 53.9K | 22 | by Jan 1993 – Jan 2012 |
| WTG Mobil O-8-17471 | WTG Exploration only | Kiowa Peak, NW. (Bend) | Stonewall | 4 | 53.8K | 3.18K | by Jan 1993 – Aug 2001 |
| Graf, C. W. O-6-1671 | Exxon Mobil Corporation only | Talco | Titus | 6 | 53.3K | 23 | by Jan 1993 – Jan 2012 |
| Phillips, W. D. & V. I. Act. #1 O-6-1689 | Exxon Mobil Corporation only | Talco | Titus | 4 | 53.1K | 23 | by Jan 1993 – Jan 2012 |
| Pegasus Ellenburger Unit G-9-177356 | Mobil Producing TX. & N.M. Inc. only | Pegasus (Ellenburger) | Upton | 1 | 50.9K | 1.02M | Mar 2000 – Jul 2001 |
| Williams, I. N. "A" O-6-1636 | Exxon Mobil Corporation only | Talco | Titus | 9 | 49.7K | 23 | by Jan 1993 – Jan 2012 |
| Parker, J E O-10-34232 | Exxon Mobil Corporation only | Martin, W. (Wolf Camp) | Andrews | 2 | 48.8K | 226K | Jul 1994 – Aug 2000 |
| Terry, J. K. OU 4 O-6-13259 | Exxon Mobil Corporation only | Talco | Franklin | 1 | 47.8K | 13 | Oct 1993 – May 2011 |
| Sarita Field Oil & Gas Unit O-4-12733 | Exxon Mobil Corporation only | Sarita ( 5-D) | Kenedy | 2 | 46.4K | 49.1K | Mar 1998 – Oct 2005 |
| Sarita Field Oil & Gas Unit O-4-6964 | Exxon Mobil Corporation only | Sarita ( 5-G & H, E) | Kenedy | 4 | 44.2K | 64.2K | by Jan 1993 – Aug 2004 |
| Lehman, W.F.L. G-4-95717 | Cimarron Engineering, LLC only | Mobil-David (Anderson, Seg. -R-) | Nueces | 1 | 43.7K | 2.39M | by Jan 1993 – May 2009 |
| Pegasus Ellenburger Unit G-9-150683 | Mobil Producing TX. & N.M. Inc. only | Pegasus (Ellenburger) | Midland | 1 | 42.7K | 4.47M | Aug 1994 – May 2001 |
| Chapman Ranch G-4-225042 | Decker Operating Co., L.L.C. only | Mobil-David (Howell Hight) | Nueces | 1 | 42.2K | 1.42M | Jan 2007 – Jun 2026 |
| Sarita Field Oil & Gas Unit O-4-12061 | Exxon Mobil Corporation only | Sarita (14-E, E) | Kenedy | 1 | 40.8K | 74.6K | by Jan 1993 – Jun 2002 |
| King Ranch Headquarters O-4-10420 | Exxon Mobil Corporation only | Big Caesar, West (H-37) | Kleberg | 1 | 40.8K | 7.16K | by Jan 1993 – Apr 2002 |
| Chapman Ranch C G-4-219755 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 40.1K | 1.84M | May 2006 – May 2011 |
| Broussard-Hebert a/C #1 O-3-18396 | Exxon Mobil Corporation only | Anahuac (FB D-1, East, Frio 13) | Chambers | 1 | 39.8K | 67.9K | by Jan 1993 – Jun 2000 |
| Kelsey Unit O-4-8310 | Exxon Mobil Corporation only | Kelsey, Deep (Zone 22) | Brooks | 3 | 39.7K | 46.5K | by Jan 1993 – Feb 1999 |
| East, S. K. Mrs. -B- G-4-165077 | Exxon Mobil Corporation only | Sarita, East (Frio) | Kenedy | 1 | 39.7K | 4.64M | Oct 1997 – Jul 2000 |
| Penn Fee OU 5 O-6-12689 | Exxon Mobil Corporation only | Talco | Franklin | 1 | 39.6K | 23 | by Jan 1993 – Mar 2008 |
| Brown-Condren-Davis Unit O-8-27047 | S.B. Street Operating, Inc. only | Mobile (Strawn, Upper) | Throckmorton | 1 | 39.4K | 13 | Jul 1993 – Jul 2001 |
| Wims, Lena O-6-1701 | Exxon Mobil Corporation only | Talco | Franklin | 4 | 38.7K | 23 | by Jan 1993 – Jun 2011 |
| Young Heirs OU 7 O-6-12580 | Exxon Mobil Corporation only | Talco | Franklin | 1 | 37.8K | 23 | by Jan 1993 – Jun 2011 |
| Mobil Unit B AC O-2-11199 | Marathon Oil EF LLC only | Sugarkane (Austin Chalk) | Karnes | 1 | 37.5K | 200K | Apr 2015 – Aug 2015 |
| Jacks Creek OU3 O-3-21170 | Exxon Mobil Corporation only | Jacks Creek (Wilcox D) | Tyler | 1 | 37.5K | 177K | by Jan 1993 – Feb 2001 |
| King Ranch Seeligson O-4-11377 | Exxon Mobil Corporation only | T-C-B, E. (20-I-4, NE,3 ) | Kleberg | 5 | 37.4K | 54.8K | by Jan 1993 – Dec 1998 |
| Chapman Ranch G-4-266597 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 37.3K | 741K | Jun 2012 – Oct 2012 |
| Owens Heirs O-11-5994 | Mobil Producing TX. & N.M. Inc. only | Slaughter | Hockley | 11 | 37K | 32.2K | by Jan 1993 – Nov 1993 |
| Parks Field Unit No. 2 G-10-147483 | Mobil Producing TX. & N.M. Inc. only | Parks (Devonian) | Midland | 1 | 36.7K | 1.18M | Nov 1993 – Apr 2008 |
| Terry, J. K. OU 3 O-6-13265 | Exxon Mobil Corporation only | Talco | Franklin | 1 | 36.1K | 6 | Sep 1993 – Jun 2011 |
| Chapman Ranch C G-4-262707 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 35.9K | 2.07M | Sep 2011 – Feb 2012 |
| Castleberry, C. W. O-7-7155 | Exxon Mobil Corporation only | East Texas | Gregg | 1 | 34.1K | 3.52K | by Jan 1993 – Jun 1998 |
| McGill Bros. O-4-7011 | Exxon Mobil Corporation only | Kelsey, Deep (Zone 16-a, W) | Brooks | 3 | 33.6K | 26.3K | by Jan 1993 – Sep 1999 |
| Mobil Fee O-10-28729 | Southwest Royalties, Inc. only | Collie (Delaware) | Ward | 1 | 32.9K | 30.6K | by Jan 1993 – Mar 2015 |
| Mobil-Scott, R. O-10-2776 | Marathon Oil Company only | Howard Glasscock | Howard | 12 | 32.5K | 32 | by Jan 1993 – Nov 1997 |
| Exxon-Yates Ranch Fee "D" G-4-156988 | Exxon Mobil Corporation only | Bold Forbes (9800) | Duval | 1 | 32.4K | 2.23M | Aug 1995 – Aug 2001 |
| Crook-Chapman 49 G-4-269642 | Apache Corporation only | Mobil-David (Anderson) | Nueces | 1 | 31.8K | 483K | Mar 2013 – Jul 2013 |
| Chapman Ranch G-4-213210 | Apache Corporation only | Mobil-David (Frio 12,600) | Nueces | 1 | 31.6K | 1.22M | Jun 2005 – Dec 2010 |
| Kleberg,r.j.jr.tr-Viboraspasture O-4-5591 | Exxon Mobil Corporation only | Viboras ( G-13-C) | Brooks | 8 | 30.6K | 39.7K | by Jan 1993 – Dec 1999 |
| Roberts-Coble "B-1" O-11-14339 | Mobil Producing TX. & N.M. Inc. only | Levelland | Hockley | 6 | 29.3K | 14K | by Jan 1993 – Jul 1994 |