| Feely, W.A. O-8-24535 | Stewart, Joseph Thomas only | Callahan County Regular | Callahan | 3 | 663 | 63 | by Jan 1993 – Sep 1999 |
| Isbell G-8-181115 | D.J. & T. Energy only | Callahan County Regular | Callahan | 1 | 644 | 64.1K | Jun 2000 – Oct 2020 |
| South Callaghan Ranch G-4-236370 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 642 | 114K | Dec 2007 – Aug 2026 |
| Callaghan Ranch G-4-172902 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 634 | 330K | Sep 2004 – Mar 2009 |
| Smith, Wanda JO O-8-17317 | Smith Pipe of Abilene only | Callahan County Regular | Callahan | 2 | 625 | 13 | by Jan 1993 – Feb 1994 |
| McAllen Fieldwide Unit G-4-171030 | Shell Western E&P only | McAllen (Hansen) | Hidalgo | 1 | 622 | 127K | Jan 1998 – Nov 2004 |
| Evans, M. P. G-4-157385 | XTO Energy Inc. only | McAllen (6500) | Hidalgo | 1 | 619 | 66.6K | Dec 1995 – Feb 2000 |
| Park, J.F. O-8-23001 | Masada Oil & Gas Company Ltd. only | Callahan County Regular | Callahan | 8 | 610 | 17 | by Jan 1993 – Nov 1999 |
| South Callaghan Ranch G-4-143953 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 602 | 837K | by Jan 1993 – Aug 2026 |
| South Callaghan Ranch G-4-236423 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 595 | 72.2K | Mar 2008 – Nov 2009 |
| McCall, C. S. O-13-4433 | Breck Operating Corp. only | Clingingsmith (Conglomerate) | Montague | 1 | 589 | 481 | by Jan 1993 – Jan 1994 |
| South Callaghan Ranch G-4-149176 | Aldine Oil and Gas, LP only | Big Cowboy (Lobo) | Webb | 1 | 588 | 1.98M | Apr 1994 – Oct 2013 |
| South Callaghan Ranch G-4-195192 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 584 | 1.36M | May 2003 – Sep 2015 |
| Callaghan Ranch G-4-208789 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 576 | 1.48M | Feb 2005 – Jun 2012 |
| Jamk O-8-16256 | Callaway Production, LLC only | Coleman County Regular | Coleman | 2 | 576 | 118 | by Jan 1993 – Dec 2000 |
| Brooks, Lucion "A" G-8-120282 | Petex only | Callahan County Regular (Gas) | Callahan | 1 | 575 | 52.3K | by Jan 1993 – Dec 2013 |
| Callaghan Ranch G-4-134212 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 571 | 3.28M | by Jan 1993 – Dec 2004 |
| Guerra, A. E. G-4-221549 | Chevron U. S. A. Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 561 | 81.4K | Jul 2006 – Feb 2007 |
| South Callaghan Ranch G-4-150679 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 560 | 500K | Jul 1994 – Aug 2026 |
| Callaghan Ranch G-4-146869 | Hilcorp Energy Company only | Finley-Webb (Upper Cons) | Webb | 1 | 557 | 487K | Sep 1993 – Jul 2015 |
| McCall, J. D. G-13-235589 | Upham Oil & Gas Company only | Newark, East (Barnett Shale) | Parker | 1 | 541 | 208K | Sep 2007 – Nov 2019 |
| Smith O-8-28335 | Sabre Oil and Gas Corp. only | Callahan County Regular | Callahan | 1 | 529 | 26.6K | Oct 1997 – Oct 1998 |
| Ingram, Joe G-8-145719 | Geotrac Energy Corporation only | Callahan County Regular (Gas) | Callahan | 1 | 529 | 76.2K | Jun 1993 – Jun 1997 |
| Hough, Willis O-8-5086 | Crude Production Company only | Callahan County Regular | Callahan | 8 | 524 | 20 | by Jan 1993 – Mar 2005 |
| Snyder O-8-27542 | Thompson, Richard W. Inc. only | Callahan County Regular | Callahan | 1 | 515 | 0 | Mar 1995 – Aug 1995 |
| McAllen Fieldwide Unit G-4-206164 | Shell Western E&P only | McAllen (Consolidated FB-B) | Hidalgo | 1 | 511 | 202K | Oct 2004 – Jun 2006 |
| McAllen, A.A. G-4-76054 | White Oak Operating Company LLC only | La Jara (Frio) | Hidalgo | 1 | 495 | 311K | Oct 2000 – Feb 2015 |
| South Callaghan Ranch G-4-138684 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 494 | 538K | by Jan 1993 – Aug 2026 |
| West McAllen G-4-155037 | Fina Oil & Chemical Company only | McAllen, West (Biedenharn, Up.) | Hidalgo | 1 | 492 | 180K | Dec 1994 – Jun 1995 |
| Callaway, W. R. G-13-209731 | Texxol Operating Company, Inc. only | Hodge (Conglomerate, Upper) | Wise | 1 | 489 | 22.1K | Jul 2005 – Jun 2016 |
| McAllen Fieldwide Unit G-4-165173 | Totalfinaelf E&P USA Inc only | McAllen (Hansen, LO) | Hidalgo | 1 | 486 | 42.6K | Jul 1997 – Sep 2001 |
| Callaghan Ranch G-4-70528 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 484 | 425K | by Jan 1993 – Nov 2004 |
| McAllen, A. A. G-4-203081 | Merit Energy Company only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 481 | 143K | Jun 2004 – Jul 2008 |
| McCall, C.S. O-13-27714 | Breck Operating Corp. only | Clingingsmith | Montague | 1 | 467 | 365 | by Jan 1993 – Jan 1994 |
| Havens II O-8-29652 | Midsco only | Callahan County Regular | Callahan | 1 | 466 | 0 | Oct 2005 – Jul 2026 |
| Brown, J. W. Mrs. O-8-453 | Wilco Properties, Inc. only | Callahan County Regular | Callahan | 11 | 465 | 16 | by Jan 1993 – May 1994 |
| Callaway, Gerald L. O-8-23568 | Lawrence Energy Company only | Thrifty, S. (Chappel Reef) | Brown | 2 | 464 | 0 | Jan 2016 – Jul 2026 |
| Weyerhaeuser G-4-164710 | Dominion Oklahoma Texas E&P, Inc only | McAllen, West (Biedenharn, Up.) | Hidalgo | 1 | 457 | 86.7K | Aug 1997 – Nov 1999 |
| Keirn, Pearl G-4-165507 | Fina Oil & Chemical Company only | McAllen, West (6150) | Hidalgo | 1 | 452 | 63.6K | Jul 1997 – Jun 1998 |
| Connell O-8-11739 | Joint Resources Company only | Callahan County Regular | Callahan | 1 | 450 | 19 | by Jan 1993 – Oct 1994 |
| Sowell O-8-31297 | Abilene American Energy, LLC only | Callahan County Regular | Callahan | 1 | 443 | 0 | Oct 2013 – Sep 2014 |
| Callaghan Ranch G-4-145015 | Mobil Producing TX. & N.M. Inc. only | Finley-Webb (5100) | Webb | 1 | 442 | 549K | Apr 1993 – Apr 1999 |
| McAllen Fieldwide Unit G-4-173861 | Merit Energy Company only | McAllen-Pharr (Consolidated) | Hidalgo | 1 | 434 | 156K | Oct 1998 – Jan 2004 |
| Deep Creek Venture O-8-32330 | Sands Energy LLC only | Callahan County Regular | Callahan | 7 | 424 | 0 | Jun 2019 – Nov 2020 |
| McAllen, A. A. G-4-218440 | Merit Energy Company only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 423 | 85.2K | Apr 2006 – May 2017 |
| South Callaghan Ranch G-4-251348 | Aldine Oil and Gas, LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 422 | 77.1K | Jul 2009 – Nov 2025 |
| Watts, Callie G-13-131734 | McCutchin Petroleum Corporation only | Boonsville (Bend Congl., Gas) | Wise | 1 | 420 | 159K | by Jan 1993 – Feb 2025 |
| Callie O-3-17880 | Union Pacific Resources Company only | Kurten (Buda) | Brazos | 1 | 410 | 314 | by Jan 1993 – Apr 1993 |
| Weldon, Edwards -B- O-8-11184 | Ginco Operating Co. only | Callahan County Regular | Callahan | 16 | 399 | 5 | by Jan 1993 – Oct 1995 |
| Snyder Ranch O-8-29782 | Quest Emg, Inc. only | Callahan County Regular | Callahan | 1 | 391 | 0 | Apr 2010 – Aug 2011 |