| Nail Ranch "20" O-8-28310 | Daylight Petroleum LLC only | Jumpstart (Lower Cook) | Shackelford | 23 | 651K | 87.7K | Nov 1997 – Apr 2026 |
| Cook 62/83 O-8-26774 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 46 | 529K | 21 | Jan 1993 – Apr 2026 |
| Newell, W. P. -B- O-8-9194 | DH Operating, Inc. only | Cook Ranch | Shackelford | 29 | 402K | 10.4K | Jan 1993 – Apr 2026 |
| Newell, W. P., -A- O-8-9193 | DH Operating, Inc. only | Cook Ranch | Shackelford | 27 | 361K | 21 | Jan 1993 – Apr 2026 |
| Nail "M" O-8-22523 | Van Operating, Ltd. only | Nail (Cook, Upper) | Shackelford | 23 | 326K | 697 | Jan 1993 – Oct 2020 |
| Nail Ranch "19" O-8-28255 | Daylight Petroleum LLC only | Jumpstart (Lower Cook) | Shackelford | 6 | 307K | 22.2K | Jul 1997 – Apr 2026 |
| Nail Ranch 42B O-8-28176 | Daylight Petroleum LLC only | Jumpstart (Lower Cook) | Shackelford | 4 | 159K | 9.16K | Apr 1997 – Mar 2026 |
| Cook, W. I. O-8-3564 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 58 | 133K | 48.2K | Jan 1993 – Apr 2026 |
| Nail 120 (M-J) O-8-16502 | Tom-Tom Operating, LLC only | Cook Ranch | Shackelford | 18 | 121K | 52 | Jan 1993 – Apr 2026 |
| Cook Ranch 88 O-8-30364 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 33 | 114K | 44.7K | Jul 2009 – Apr 2026 |
| Cook Ranch 112 O-8-26590 | Stasney Well Service, LLC only | Cook Ranch (Miss.) | Shackelford | 5 | 106K | 690K | Jan 1993 – Oct 2011 |
| Nail, J.H. 119 O-8-13042 | Tom-Tom Operating, LLC only | Cook Ranch | Shackelford | 44 | 87.8K | 66 | Jan 1993 – Apr 2026 |
| Entl Ranch 41B O-8-28038 | Daylight Petroleum LLC only | Jumpstart (Lower Cook) | Shackelford | 5 | 81.4K | 10.6K | Nov 1996 – Apr 2026 |
| Ivy O-8-30151 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 14 | 67.8K | 15.9K | Aug 2008 – Dec 2023 |
| Cook Strawn 85S/86S Pooled Unit O-8-30549 | Stasney Well Service, LLC only | Cook Ranch (Strawn Sand) | Shackelford | 12 | 66.5K | 67.1K | May 2010 – Oct 2018 |
| Cook -a-, Section 81 O-8-9183 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 5 | 55.6K | 21 | Jan 1993 – Apr 2026 |
| Cook, W. I. Estate, Sec. 64 O-8-27444 | Young, Marshall R., Oil Co. only | Cook Ranch (Miss.) | Shackelford | 1 | 52.7K | 64.8K | Jan 1995 – Sep 1998 |
| Cook Ranch "60S" O-8-30671 | Stasney Well Service, LLC only | Cook Ranch (Strawn Sand) | Shackelford | 8 | 52.6K | 47.7K | Dec 2010 – Nov 2024 |
| Nail -124A- O-8-22749 | Clavo Oil, LLC only | Nail (Cook, Upper) | Shackelford | 3 | 51.7K | 81 | Jan 1993 – Dec 2023 |
| Stasney's Cook Ranch "57" O-8-29973 | Stasney Well Service, LLC only | Shackelford County Regular | Shackelford | 19 | 44.9K | 0 | Sep 2007 – Apr 2026 |
| Davis, Merrick -A- O-8-5881 | Crazy Horse Operating LLC only | Low-Davis (Cook Sand) | Shackelford | 8 | 44.3K | 21 | Jan 1993 – Oct 2023 |
| Hendrick, T. G. -A- O-8-3652 | Momentum Operating Co., Inc. only | Nail, North (Cook) | Shackelford | 2 | 42.5K | 21 | Jan 1993 – Apr 2026 |
| Cook Ranch 85WS O-8-31366 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 14 | 41K | 0 | May 2014 – Apr 2026 |
| Dyer, J. O-8-19196 | Mesquite Land & Minerals Co. only | Deana Fay (Cook Sand) | Shackelford | 15 | 36.3K | 62 | Aug 1993 – Nov 2012 |
| Cook -B- Sec. 113 O-8-3571 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 2 | 34.8K | 24.2K | Jan 1993 – Apr 2026 |
| Newell Sec. 86S O-8-3580 | CDJ Oil Company, LLC only | Cook Ranch (3160) | Shackelford | 2 | 32.8K | 85 | Jan 1993 – Feb 2026 |
| Nail Tract 20 O-8-6693 | Clavo Oil, LLC only | Nail Tract 20 (Cook Sand) | Shackelford | 3 | 32.5K | 21 | Jan 1993 – Apr 2026 |
| Cook, W. I. Estates Sec. /139A/ O-8-3573 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 24 | 31.5K | 21 | Jan 1993 – Jul 2002 |
| Cook Ranch 60SH O-8-30887 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 12 | 30.9K | 0 | Nov 2011 – Apr 2026 |
| Cook, Sec. 81 O-8-25159 | Stasney, H. R. & Sons, Ltd. only | Cook Ranch (Miss.) | Shackelford | 1 | 28.4K | 217K | Jan 1993 – Oct 2002 |
| Newell, W. P., Est. O-8-8923 | DH Operating, Inc. only | Cook Ranch | Shackelford | 9 | 28.2K | 216 | Jan 1993 – Nov 2016 |
| Newell, Mrs. Dell B O-8-3655 | Harvick, George R. only | Newell (Cook Sand) | Shackelford | 10 | 28.1K | 39 | Jan 1993 – Jul 2017 |
| Stasney Ranch 62/63 O-8-32666 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 20 | 27.9K | 0 | Apr 2023 – Apr 2026 |
| Nail, J.H. "A" O-8-22627 | Van Operating, Ltd. only | Nail (Cook, Upper) | Shackelford | 6 | 25.8K | 21 | Jan 1993 – Oct 1997 |
| Cook O-8-20719 | Glahn Resources, Inc. only | Ivy | Shackelford | 2 | 25.8K | 1.32K | Jan 1993 – Apr 2026 |
| Nail Ranch "19" O-8-28497 | Daylight Petroleum LLC only | Jumpstart, N. (Upper Cook) | Shackelford | 2 | 24.1K | 849 | May 1998 – Apr 2026 |
| Cook, W. I., Est. -B- /Sec. 90/ O-8-7068 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 3 | 23.7K | 21 | Jan 1993 – Jan 2009 |
| Cook Ranch "61" O-8-30129 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 9 | 21.3K | 865 | Jun 2008 – Apr 2026 |
| Stasney Ranch 62 O-8-32169 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 15 | 21.2K | 0 | Aug 2018 – Apr 2026 |
| Nail Ranch "20" O-8-29270 | Daylight Petroleum LLC only | Jumpstart, N. (Upper Cook) | Shackelford | 2 | 20.9K | 0 | Jul 2003 – Apr 2026 |
| Cook Ranch 113 O-8-30273 | Stasney Well Service, LLC only | Cook Ranch | Shackelford | 7 | 20.3K | 2.42K | Jan 2009 – Oct 2020 |
| Cook O-8-28620 | Glahn Resources, Inc. only | Jasper-Glahn (Bend) | Shackelford | 1 | 19.5K | 22.1K | Mar 1999 – Apr 2026 |
| Nail '136' O-8-32289 | Bluff Creek Petroleum, LLC only | Nail Tract 20 (Cook Sand) | Shackelford | 3 | 19.4K | 0 | Nov 2018 – Apr 2026 |
| Cook 85-60 Pooled Unit O-8-30140 | Stasney Well Service, LLC only | Shackelford County Regular | Shackelford | 7 | 19.1K | 7 | Jun 2008 – Apr 2026 |
| Newell Sec. 86N O-8-7067 | CDJ Oil Company, LLC only | Cook Ranch | Shackelford | 5 | 18.9K | 85 | Jan 1993 – Feb 2026 |
| Cook 145 O-8-29336 | Stasney Well Service, LLC only | Cook Ranch (Miss.) | Shackelford | 1 | 18K | 37.7K | Dec 2003 – Apr 2026 |
| Cook 116S O-8-30594 | Stasney Well Service, LLC only | Cook Ranch (Strawn Sand) | Shackelford | 1 | 17.3K | 0 | Oct 2010 – Apr 2026 |
| Cook Ranch O-8-27239 | Breck Operating Corp. only | Collin Gage (Miss.) | Shackelford | 1 | 16.5K | 57K | Jul 1994 – Jan 1997 |
| Cook a Section 118 O-8-27251 | Stasney, H. R. & Sons, Ltd. only | Cook Ranch (Tannehill, Middle) | Shackelford | 1 | 16.4K | 22.7K | Jun 1994 – Dec 2000 |
| Cook Ranch 63 O-8-27241 | Stasney, H. R. & Sons, Ltd. only | Stasney (Mississippian) | Shackelford | 1 | 15.7K | 44.7K | Jul 1994 – Nov 1995 |