| Gutierrez, O. G-4-116953 | J. C. Martin (Wilcox 7100) | Zapata | 1 | 0 | 0 | Jan 1993 – Dec 2002 |
| Slick, T.B. Estate B1 G-4-135379 | Frost, North (Ashby FB III) | Starr | 1 | 0 | 239K | Jan 1993 – Dec 2002 |
| Lechenger G-4-179847 | Wildcat | Webb | 1 | 0 | 0 | Apr 2000 – Dec 2002 |
| Vaquillas Ranch Co. Ltd. G-4-177062 | Wildcat | Webb | 1 | 0 | 0 | Jan 2000 – Nov 2002 |
| Slick, T. B. -E- Est. O-4-2344 | Rincon | Starr | 3 | 0 | 0 | Jan 1993 – Nov 2002 |
| University 4 G-9-186538 | Deer Canyon (Strawn) | Terrell | 1 | 0 | 50.1K | Oct 2001 – Oct 2002 |
| Slick, T.B. Est. -A- G-4-68448 | Rincon (F) | — | 1 | 0 | 133K | Jan 1993 – Oct 2002 |
| Slick, T. B. Estate B G-4-187933 | Wildcat | Starr | 1 | 0 | 0 | Nov 2001 – Sep 2002 |
| St. Charles Co. G-4-146751 | St. Charles (Frio Cons., Upper) | Aransas | 1 | 0 | 445K | Sep 1993 – Aug 2002 |
| Lundell E G-4-188400 | Lundell (Upper Cretaceous) | Webb | 1 | 0 | 19.4K | Oct 2001 – Aug 2002 |
| Frost, P. M. "F" G-4-137887 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 261K | Jan 1993 – Aug 2002 |
| LA Perla G-4-124199 | LA Perla Ranch (9100) | Zapata | 1 | 0 | 51.9K | Jan 1993 – Aug 2002 |
| Slick, T. B. Estate B-486 G-4-168497 | Rincon (Vicksburg Sand) | Starr | 1 | 0 | 311K | Apr 1998 – Jul 2002 |
| Benavides, B.R. "A" G-4-130339 | Pok-A-Dot (Lobo) | Zapata | 1 | 0 | 414K | Jan 1993 – Jun 2002 |
| Briones, E. L. G-4-162777 | LA Perla (Lobo Cons.) | Zapata | 1 | 0 | 239K | Mar 1997 – Jun 2002 |
| McMurrey, Wm. G-4-67639 | LA Perla (Lobo Cons.) | — | 1 | 0 | 0 | Jan 1993 – May 2002 |
| LA Perla G-4-71940 | LA Perla (Lobo Cons.) | Zapata | 1 | 0 | 0 | Jan 1993 – May 2002 |
| Semmes Trust, et al "906" O-4-13069 | Rincon (90 Vicksburg 906-4) | Starr | 1 | 8.52K | 108K | Aug 2001 – Apr 2002 |
| LA Perla G-4-179565 | Wildcat | Zapata | 1 | 0 | 0 | Aug 2000 – Apr 2002 |
| LA Perla G-4-70631 | LA Perla (Lobo Cons.) | — | 1 | 0 | 16.8K | Jan 1993 – Apr 2002 |
| Carr "B" G-4-139321 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 1.18M | Jan 1993 – Mar 2002 |
| Creek Ranch 58 G-9-151756 | Pakenham (Wolfcamp) | Terrell | 1 | 0 | 68.3K | Oct 1994 – Mar 2002 |
| Vaquillas Ranch L G-4-179518 | Wildcat | Webb | 1 | 0 | 0 | Sep 2000 – Mar 2002 |
| King B G-4-177675 | Wildcat | Zapata | 1 | 0 | 0 | Mar 2000 – Mar 2002 |
| Creek Ranch 1 G-9-153894 | K M (Wolfcamp) | Terrell | 1 | 0 | 4.52K | Dec 1994 – Mar 2002 |
| Vaquillas Ranch Co. Ltd. G-4-179546 | Wildcat | Webb | 1 | 0 | 0 | Apr 2000 – Feb 2002 |
| Lundell G-4-173490 | Wildcat | Webb | 1 | 0 | 0 | Oct 1998 – Feb 2002 |
| Carr "B" G-4-141832 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 510K | Jan 1993 – Feb 2002 |
| Hein "B" G-4-125797 | Bruni Ranch (Wilcox 7250) | Webb | 1 | 0 | 128K | Jan 1993 – Feb 2002 |
| Lundell "B" G-4-103505 | McAskill (Lobo) | Zapata | 1 | 0 | 187K | Jan 1993 – Feb 2002 |
| Vaquillas Ranch Co Ltd. G-4-177213 | Wildcat | Webb | 1 | 0 | 0 | Nov 1999 – Feb 2002 |
| Dix Ranch C-99 G-4-184767 | Wildcat | Webb | 1 | 0 | 0 | Dec 2000 – Feb 2002 |
| Carr "B" G-4-146856 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 911K | Sep 1993 – Jan 2002 |
| Hubberd,william "A" G-4-58883 | Laredo (Lobo) | — | 1 | 0 | 0 | Jan 1993 – Jan 2002 |
| Hubberd G-4-173246 | Laredo (7900) | Webb | 1 | 0 | 15.6K | May 1999 – Jan 2002 |
| Carr "B" G-4-145792 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 1.4K | Jun 1993 – Jan 2002 |
| Martinez, Sinesio G-4-62754 | Laredo (Lobo) | — | 1 | 0 | 0 | Jan 1993 – Jan 2002 |
| Slick, T. B. B-536 G-4-147231 | Rincon (Vicksburg 5400) | Starr | 1 | 0 | 534K | Nov 1993 – Dec 2001 |
| Slick, T. B. B-536 G-4-147234 | Rincon (Vicksburg 250) | Starr | 1 | 0 | 95.8K | Nov 1993 – Dec 2001 |
| LA Perla G-4-179267 | LA Perla (Lobo Cons.) | Zapata | 1 | 0 | 56.8K | Aug 2000 – Dec 2001 |
| Vergara G-4-179522 | Wildcat | Webb | 1 | 0 | 0 | Aug 2000 – Dec 2001 |
| I.R. Gaona G-4-170507 | Benavides (Lobo Cons.) | Webb | 1 | 0 | 59.9K | Jun 1998 – Dec 2001 |
| Slick, T. B. Estate B G-4-149646 | Frost, West (VX-Wood) | Starr | 1 | 0 | 627K | Apr 1994 – Nov 2001 |
| Carr G-4-122174 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 898K | Jan 1993 – Nov 2001 |
| Hubberd "F" G-4-163267 | Hubberd (Lobo) | Webb | 1 | 0 | 59K | May 1997 – Nov 2001 |
| Lechenger G-4-166068 | Samuels (Lobo) | Webb | 1 | 0 | 1.37M | Dec 1997 – Oct 2001 |
| Villarreal State a 768 G-4-177670 | Wildcat | Webb | 1 | 0 | 0 | Jan 2000 – Oct 2001 |
| Villarreal, C.G. G-4-119539 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 130K | Jan 1993 – Oct 2001 |
| St. Charles Co. G-4-161650 | St. Charles (Frio Cons., Lower) | Aransas | 1 | 0 | 140K | May 1994 – Oct 2001 |
| St. Charles Co. O-4-3883 | St. Charles, N. (a Sand) | Aransas | 3 | 0 | 0 | Jan 1993 – Sep 2001 |