| Ohio-Sun Unit O-3-2998 | Allegiant Resources, LLC | Markham N.-Bay City,n(cornelius) | 53 | 1.05M | 1.25M | Jan 1993 – Jul 2026 |
| Staubach O-3-24185 | Progenies Operating LLC | Provedence (Frio) | 1 | 984K | 2.71M | Jan 2002 – Jul 2026 |
| Ohio-Sun Unit O-3-2997 | Allegiant Resources, LLC | Markham N.-Bay City, N (Cayce) | 27 | 752K | 455K | Jan 1993 – Jul 2026 |
| Huebner, Pauline A-382 O-3-24274 | Callon (Eagle Ford) LLC | Provedence (Frio) | 3 | 614K | 1.69M | Oct 2002 – Feb 2023 |
| Matthes-Huebner O-3-24353 | Hemco Development, LLC | Provedence (Frio) | 1 | 457K | 1.15M | Jan 2003 – May 2018 |
| Cobb, F. G. -B- O-3-9504 | Texian Operating Company, LLC | Bay City (7700 Frio) | 9 | 416K | 503K | Jan 1993 – Jul 2026 |
| Bunk NO 1 Pooled Unit O-3-23584 | Proline Energy Resources Inc | Wadsworth (11,100-Oil) | 3 | 369K | 1.52M | May 1998 – Jul 2026 |
| Burkhart O-3-24279 | Brigham Oil & Gas, L.P. | Provedence (Frio) | 1 | 339K | 2.2M | Jul 2002 – May 2009 |
| Frankson Etal O-3-23821 | Black Draw Energy LLC | Buttermilk (Shaw) | 1 | 294K | 0 | Feb 2000 – Jul 2026 |
| Cobb, F. G. -B- O-3-9470 | Texian Operating Company, LLC | Bay City (7500 Frio) | 8 | 237K | 248K | Jan 1993 – Jul 2026 |
| Ohio-Sun Unit O-3-2996 | Allegiant Resources, LLC | Markham N.-Bay City, N (Carlson) | 21 | 223K | 362K | Jan 1993 – Jul 2026 |
| Blessing F-3 Unit O/A O-3-9803 | Hugoton Operating Company, Inc. | Blessing (F- 3) | 23 | 201K | 258K | Jan 1993 – Jul 2026 |
| Moore Estate O-3-7353 | Apache Corporation | Bay City (8650 Frio) | 1 | 199K | 279K | Jan 1993 – Jan 2009 |
| Cobb, F.G. -A- O-3-20364 | Texian Operating Company, LLC | Bay City (7000 Frio) | 1 | 192K | 183K | Jan 1993 – Jul 2026 |
| Smith, Howard, Fee O-3-2969 | Qri Industries, Inc. | Markham | 34 | 183K | 20 | Jan 1993 – Jul 2026 |
| Cobb, F. G. -B- O-3-9483 | Texian Operating Company, LLC | Bay City (7900 Frio) | 13 | 180K | 293K | Jan 1993 – Jul 2026 |
| Bunk, J.F. O-3-19915 | Shidler, Mark L., Inc. | Lucky, South (9300-B) | 1 | 165K | 15K | Jan 1993 – May 2017 |
| Bouldin, Florence V. -B- O-3-9880 | Oak Energy, LLC | Sugar Valley, S. (Frio 10850) | 1 | 155K | 375K | Jan 1993 – Jul 2026 |
| Huebner, Pauline O-3-24402 | Callon (Eagle Ford) LLC | Faith-Mag (Tex Miss 2) | 2 | 149K | 217K | Apr 2003 – Mar 2023 |
| Johnson, Sallie O-3-9495 | Texian Operating Company, LLC | Bay City (8200 Frio) | 1 | 146K | 354K | Jan 1993 – Jul 2026 |
| Southland Trull O-3-21884 | KD Energy, LLC | Pheasant, SW. (8150 B-1) | 2 | 143K | 239K | Jan 1993 – Jul 2026 |
| Wilson Trust O-3-24751 | Hemco Development, LLC | Pheasant, South ( B-3) | 1 | 135K | 16.5K | Jun 2005 – Dec 2018 |
| Pheasant Blessing O-3-25474 | Dallas Petroleum Group, LLC | Pheasant (McDonald) | 1 | 135K | 73.6K | Dec 2009 – Jul 2026 |
| Cobb, F. G. -B- O-3-9500 | Urban Oil & Gas Group, LLC | Bay City (8500 Frio) | 3 | 132K | 281K | Jan 1993 – Feb 2021 |
| Wolf, Louis O-3-22978 | Kirkpatrick, John Oil LLC | Lucky, West ( F-12) | 1 | 130K | 300K | May 1996 – Jul 2026 |
| Milberger O-3-23858 | CLR Secondary Recovery, LLC | Milberger (Gravier) | 1 | 126K | 168K | Feb 2000 – Jul 2026 |
| Ohio-Sun Unit O-3-11585 | Allegiant Resources, LLC | Markham,n.-Bay City,n (7685) | 9 | 120K | 139K | Jan 1993 – Jul 2026 |
| Northern Ranch O-3-20849 | Trinidad Resources, LLC | Northern Ranch (6270) | 1 | 119K | 270K | Jan 1993 – Jul 2026 |
| Cobb, F.G. "B" O-3-20608 | Texian Operating Company, LLC | Bay City (8600 Frio) | 1 | 110K | 242K | Jan 1993 – Jul 2026 |
| Huebner, M. D. O-3-12883 | McGowan Working Partners, Inc. | Lucky, South (8700) | 2 | 108K | 12.1K | Jan 1993 – Jul 2020 |
| Ladner, et. Al. O-3-25607 | Fergus Oil & Gas, LLC | Midfields, N. W. (9300) | 1 | 108K | 0 | Sep 2010 – Jul 2026 |
| Cobb, F. G. -B- O-3-24446 | Texian Operating Company, LLC | Bay City (7450) | 1 | 105K | 149K | Aug 2003 – Jul 2026 |
| Northern Ranch O-3-23106 | Apache Corporation | Northern Ranch, South (Greta) | 2 | 96.2K | 87.5K | Nov 1996 – Nov 2008 |
| Huebner-Conklin O-3-25260 | Welderxp Ltd. | Lucky, South (8700) | 1 | 95.9K | 13.1K | Sep 2008 – Jul 2026 |
| Northern Ranch O-3-17745 | Trinidad Resources, LLC | Northern Ranch (Camp B) | 1 | 92.2K | 116K | Jan 1993 – Jul 2026 |
| Milberger A O-3-24195 | CLR Secondary Recovery, LLC | Milberger (Gravier) | 1 | 85.9K | 119K | Mar 2001 – Jul 2026 |
| Taylor Ranch O-3-26872 | Ponderosa Oil & Gas, LLC | Sugar Valley (Gravier) | 1 | 85.4K | 0 | Feb 2015 – Jun 2025 |
| Lewis, Frank H. Family -A- O-3-24176 | Icarus Operating Corporation | Merlin (Glynn "B" Sand) | 3 | 82.5K | 14.2K | Jul 2001 – Jul 2026 |
| Trull, R.B. O-3-10107 | KD Energy, LLC | Pheasant, SW. (8150 B-1) | 10 | 82.3K | 185K | Jan 1993 – Jul 2026 |
| Northern Ranch O-3-5884 | Apache Corporation | Northern Ranch (Camp Sand) | 2 | 82.2K | 97.3K | Jan 1993 – Apr 2008 |
| Cobb, F. G. -B- O-3-9493 | Urban Oil & Gas Group, LLC | Bay City (8200 Frio) | 7 | 81.7K | 105K | Jan 1993 – Jul 2020 |
| Rugeley, Henry O-3-21262 | Apache Corporation | Bay City (8800 Frio) | 1 | 81.1K | 249K | Jan 1993 – Jun 2007 |
| F. G. Cobb "A" O-3-24389 | Texian Operating Company, LLC | Bay City (7500 Frio) | 1 | 79.6K | 58.2K | Aug 2003 – Jul 2026 |
| Sartwelle O-3-23779 | Langston Oil, LLC | Tidehaven (Frio, Upper) | 1 | 79.1K | 39.8K | Feb 2000 – Jul 2026 |
| Sartwelle O-3-22536 | Quintana Pet. Corp. | Tidehaven (Frio, Upper) | 1 | 78K | 19K | Sep 1994 – Jan 1999 |
| Anderson O-3-26834 | Magnum Producing, LP | Lucky ( Gola) | 1 | 77.3K | 84.8K | Jun 2014 – Jan 2022 |
| First National Bank O-3-23014 | Sue-Ann Operating, L.C. | Midfields (Betts, L.) | 2 | 74.5K | 98.5K | Jul 1996 – Jul 2004 |
| Seerden, Margaret Gilmore O-3-14450 | Red Wolf Oil Company, Inc. | Wadsworth (9000) | 3 | 70.8K | 30.6K | Jan 1993 – Jul 2026 |
| Northern Ranch O-3-12905 | Apache Corporation | Northern Ranch (League -a- Sd.) | 1 | 69.8K | 140K | Jan 1993 – Mar 2006 |
| Ohio-Sun Unit O-3-2999 | Allegiant Resources, LLC | Markham N.-Bay City,n (McDonald) | 13 | 69.8K | 107K | Jan 1993 – Jul 2026 |