| Super Unit O-13-29589 | Flintlock Exploration, LLC only | Big Mineral Creek (Consolidated) | Grayson | 162 | 2.47M | 1.35M | Dec 1998 – Aug 2026 |
| Sherman /7500 Sand/ Unit O-13-11505 | BKM Production only | Sherman (7500 Sand) | Grayson | 82 | 2.05M | 3.21M | by Jan 1993 – Aug 2026 |
| Little, O. L. O-13-3060 | Export Petroleum Corporation only | Sherman, East | Grayson | 11 | 1.98M | 21 | by Jan 1993 – Aug 2026 |
| Brown, Beth, Etal O-13-3085 | BKM Production only | Sherman, East | Grayson | 10 | 1.06M | 19.8K | by Jan 1993 – Aug 2026 |
| Hazelwood O-13-30027 | Tatanka Operating, LLC only | Gordonville, S. (Penn.) | Grayson | 2 | 983K | 1.71M | Oct 2001 – Aug 2026 |
| Sadler /Penn./ Field Unit O-13-11127 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 64 | 741K | 426K | by Jan 1993 – Aug 2026 |
| Country Club O-13-28065 | R2Q Operating LLC only | Gary Henry (Lower Baker Sand) | Grayson | 3 | 643K | 678K | by Jan 1993 – Aug 2026 |
| Hudgins, John O-13-29593 | Tatanka Operating, LLC only | Preston (Davis, Lower) | Grayson | 4 | 634K | 4.71M | Jul 1998 – Aug 2026 |
| Degan Sand Unit O-13-15475 | BLS Production Co., Inc. only | Collinsville, SE. (4100 Degan) | Grayson | 16 | 602K | 21 | by Jan 1993 – Aug 2026 |
| North Sadler Penn Unit O-13-28749 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 17 | 597K | 484K | Apr 1994 – Aug 2026 |
| Big Mineral Creek (UV Sand) Unit O-13-31699 | Flintlock Exploration, LLC only | Big Mineral Creek (UV Sand Unit) | Grayson | 31 | 555K | 1.71M | Sep 2010 – Aug 2026 |
| Big Mineral Creek -S- Sand Unit O-13-14655 | Venoco, Inc. only | Big Mineral Creek (S Sdstn.) | Grayson | 46 | 539K | 242K | by Jan 1993 – Nov 1998 |
| Lawrence Trust Unit O-13-31727 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 3 | 512K | 1.23M | Apr 2010 – Jun 2025 |
| Green O-13-29412 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 4 | 497K | 4.11M | Sep 1997 – Feb 2011 |
| Moran, M. E. O-13-14374 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 1 | 484K | 91.7K | by Jan 1993 – Aug 2026 |
| Degan Sand Unit O-13-16376 | Felderhoff Production Company only | Tioga, East (Degan Sand) | Grayson | 14 | 463K | 465 | by Jan 1993 – Jul 2026 |
| Big Mineral Creek/Strawn I/Unit O-13-20115 | Venoco, Inc. only | Big Mineral Creek (Strawn) | Grayson | 52 | 427K | 43.9K | by Jan 1993 – Nov 1998 |
| Sherman /8900 Penn./ Unit O-13-12470 | BKM Production only | Sherman (Pennsylvanian 8900) | Grayson | 36 | 410K | 1.99M | by Jan 1993 – Aug 2026 |
| Sandusky /Oil Creek Sd./ Unit O-13-8512 | Silver Creek Oil & Gas, LLC only | Sandusky (Oil Creek Sd.) | Grayson | 15 | 385K | 624K | by Jan 1993 – Aug 2026 |
| Bennett a Unit O-13-32207 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 2 | 370K | 985K | Sep 2011 – Aug 2022 |
| Bryan O-13-30258 | R2Q Operating LLC only | Big Indian (Dornick Hills) | Grayson | 2 | 368K | 2.82M | Jan 2004 – Aug 2026 |
| John Marshall O-13-34051 | Silver Creek Oil & Gas, LLC only | Sandusky, West (Strawn) | Grayson | 4 | 350K | 38.2K | Oct 2021 – Aug 2026 |
| Handy Unit O-13-12451 | BLS Production Co., Inc. only | Handy, Southeast (H Sand) | Grayson | 14 | 341K | 448K | by Jan 1993 – Aug 2026 |
| Davis Unit O-13-31898 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 317K | 534K | Jan 2011 – Feb 2014 |
| Slaughter, Dorothy O-13-14493 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 2 | 304K | 58.5K | by Jan 1993 – Aug 2026 |
| Renfro Unit O-13-33235 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 2 | 295K | 916K | Feb 2015 – Aug 2026 |
| Tate-Gibbs-Head Unit O-13-17185 | BKM Production only | Sherman | Grayson | 1 | 290K | 35.1K | by Jan 1993 – Aug 2026 |
| Dutch Unit O-13-32960 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 2 | 287K | 1.62M | Apr 2014 – Aug 2026 |
| Grand HI CT Heroines of Jericho O-13-17171 | BKM Production only | Sherman | Grayson | 2 | 280K | 31.8K | by Jan 1993 – Aug 2026 |
| Wood O-13-29081 | Grayson Petroleum Company only | Gee (Oil Creek, Upper) | Grayson | 3 | 271K | 0 | Jan 1996 – Apr 2011 |
| Big Mineral Creek/Barnes SD/Unit O-13-12557 | Venoco, Inc. only | Big Mineral Creek (Barnes Sand) | Grayson | 40 | 267K | 105K | by Jan 1993 – Nov 1998 |
| Moon, G. P. et Al O-13-17176 | BKM Production only | Sherman | Grayson | 1 | 242K | 15.8K | by Jan 1993 – Aug 2026 |
| Rising, H. L., et Al O-13-17183 | BKM Production only | Sherman | Grayson | 6 | 234K | 51.2K | by Jan 1993 – Aug 2026 |
| Holland O-13-26434 | BKM Production only | Perrin, N. Afb (Cordell Sd.) | Grayson | 1 | 233K | 2.41M | by Jan 1993 – Aug 2026 |
| Gray, John G. O-13-30760 | Seitz, J. R. & Adam, Ltd. only | Dove (Penn. Basal) | Grayson | 5 | 232K | 0 | Feb 2007 – Aug 2026 |
| Barnes, J. E. O-13-29561 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 231K | 2.41M | Jul 1998 – Aug 2026 |
| Slagle-Fallon O-13-28319 | Little, Quintin Company,inc.,the only | Southmayd, North (Baker-Viola) | Grayson | 1 | 224K | 329K | by Jan 1993 – Aug 2026 |
| Sadler (Dornick Hills) Sand Unit O-13-27921 | Grayson Petroleum Company only | Andrade (Dornick Hills) | Grayson | 13 | 224K | 21 | by Jan 1993 – Aug 2026 |
| Robertson, Joe 2 O-13-28190 | BKM Production only | Sherman (Ordivician 9,450) | Grayson | 1 | 224K | 1.62M | by Jan 1993 – Aug 2026 |
| McLinsky, Max et al Unit O-13-17175 | BKM Production only | Sherman | Grayson | 1 | 216K | 13.5K | by Jan 1993 – Aug 2026 |
| Sweeney, Helen O.,mrs O-13-29600 | BLS Production Co., Inc. only | Big Mineral Creek (Consolidated) | Grayson | 5 | 206K | 57K | Dec 1998 – Aug 2026 |
| Otto O-13-34291 | Jetta Operating Company, Inc. only | Southmayd, North (Baker-Viola) | Grayson | 1 | 205K | 374K | Apr 2024 – Jul 2026 |
| Reddick (V) O-13-32968 | Jetta Operating Company, Inc. only | Big Mineral Creek (Viola) | Grayson | 1 | 197K | 535K | Apr 2014 – Jul 2026 |
| Lilly Unit O-13-32970 | Silver Creek Oil & Gas, LLC only | Sandusky | Grayson | 3 | 195K | 1.67M | Nov 2013 – Aug 2026 |
| Fulton, C. T. O-13-30390 | Robertson-Bryce Management, LLC only | Pottsboro, West (Davis Sd.) | Grayson | 1 | 187K | 1.35M | Jun 2004 – Aug 2026 |
| Neal, C. A. O-13-2839 | Little, Quintin Company,inc.,the only | McMillan, North (Oil Creek) | Grayson | 3 | 185K | 21 | by Jan 1993 – Aug 2026 |
| Slinging Unit O-13-33105 | Silver Creek Oil & Gas, LLC only | Sadler (Penn.) | Grayson | 1 | 184K | 135K | Jul 2014 – Aug 2026 |
| Bug Off O-13-32325 | Flintlock Exploration, LLC only | Big Mineral Creek (Viola) | Grayson | 1 | 182K | 493K | Sep 2012 – Aug 2026 |
| Kimball, Louise W. O-13-3087 | BKM Production only | Sherman, East | Grayson | 7 | 181K | 354 | by Jan 1993 – Aug 2026 |
| McKinney O-13-30279 | R2Q Operating LLC only | Big Indian (Dornick Hills) | Grayson | 2 | 178K | 2.15M | Jan 2004 – Mar 2026 |