| Glasscock, Howard W. (G-S) Unit O-10-41062 | Basa Resources, Inc. only | Howard Glasscock (Consolidated) | Glasscock | 242 | 6.02M | 43K | Dec 2011 – Aug 2026 |
| Glasscock, Howard W. (G-S) Unit O-10-22575 | Sheridan Production Company, LLC only | Howard Glasscock | Glasscock | 287 | 4.42M | 70.5K | by Jan 1993 – Nov 2011 |
| Settles, W. R. -A- O-10-2704 | Conocophillips Company only | Howard Glasscock | Howard | 138 | 3.07M | 72.3K | by Jan 1993 – Nov 2011 |
| Kloh O-10-2748 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 88 | 1.84M | 751 | by Jan 1993 – Nov 2011 |
| Glasscock -N- Fee O-10-29129 | XTO Energy Inc. only | Blalock Lake, SE (Wolfcamp) | Glasscock | 11 | 1.68M | 3.22M | by Jan 1993 – Nov 2019 |
| Settles, W. R. O-10-41250 | Citation Oil & Gas Corp. only | Howard Glasscock (Consolidated) | Howard | 76 | 1.55M | 85.7K | Dec 2011 – Aug 2026 |
| Settles-Yates Unit O-10-20060 | Conocophillips Company only | Howard Glasscock | Howard | 84 | 1.08M | 34.3K | by Jan 1993 – Nov 2011 |
| Kloh O-10-42224 | Grayrock Energy II, LLC only | Howard Glasscock (Consolidated) | Howard | 80 | 1.01M | 0 | Dec 2011 – Aug 2026 |
| Glasscock -L- Fee O-10-32273 | XTO Energy Inc. only | Blalock Lake, SE (Wolfcamp) | Glasscock | 10 | 711K | 1.77M | by Jan 1993 – Nov 2019 |
| Roberts, Dora O-10-2821 | Apache Corporation only | Howard Glasscock | Howard | 59 | 638K | 39K | by Jan 1993 – Nov 2011 |
| Roberts, Dora O-10-2774 | Conocophillips Company only | Howard Glasscock | Howard | 55 | 607K | 2.33K | by Jan 1993 – Nov 2011 |
| Phillips O-10-2809 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Glasscock | 15 | 552K | 21 | by Jan 1993 – Nov 2011 |
| Glasscock Unit 44/41 O-10-52303 | Mewbourne Oil Company only | Spraberry (Trend Area) | Glasscock | 1 | 329K | 549K | May 2019 – Aug 2026 |
| Glasscock Unit 44/41 B O-10-54283 | Mewbourne Oil Company only | Spraberry (Trend Area) | Glasscock | 1 | 293K | 606K | Sep 2020 – Aug 2026 |
| Glasscock -U- Fee O-10-25434 | XTO Energy Inc. only | Roberta (Queen) | Glasscock | 8 | 258K | 38 | by Jan 1993 – Dec 2022 |
| Phillips O-10-42209 | Grayrock Energy II, LLC only | Howard Glasscock (Consolidated) | Glasscock | 9 | 236K | 0 | Dec 2011 – Aug 2026 |
| Overton, B. -A- O-10-2701 | Conocophillips Company only | Howard Glasscock | Glasscock | 29 | 230K | 11.5K | by Jan 1993 – Nov 2011 |
| Phillips, H. O-10-2702 | Apache Corporation only | Howard Glasscock | Glasscock | 11 | 208K | 1.1K | by Jan 1993 – Nov 2011 |
| M. M. Edwards O-10-20161 | MGM Oil & Gas Company only | Howard Glasscock | Glasscock | 10 | 191K | 72 | by Jan 1993 – Nov 2011 |
| Clay, H. R. O-10-2738 | Wash, Robert C. Inc. only | Howard Glasscock | Glasscock | 27 | 186K | 45 | by Jan 1993 – Nov 2011 |
| Glasscock 'M' Fee O-10-34812 | Chevron U. S. A. Inc. only | La Vista (Fusselman) | Glasscock | 1 | 169K | 1.08M | Jan 1996 – Nov 2003 |
| Hall O-10-2683 | MGM Oil & Gas Company only | Howard Glasscock | Glasscock | 3 | 142K | 63 | by Jan 1993 – Nov 2011 |
| Reed-McDonald 152 O-10-41260 | Citation Oil & Gas Corp. only | Howard Glasscock (Consolidated) | Glasscock | 4 | 139K | 18.5K | Dec 2011 – Aug 2026 |
| Settles-Yates Unit O-10-41256 | Conocophillips Company only | Howard Glasscock (Consolidated) | Howard | 34 | 131K | 1.05K | Dec 2011 – Aug 2014 |
| Overton, B.-A- O-10-41246 | Citation Oil & Gas Corp. only | Howard Glasscock (Consolidated) | Glasscock | 12 | 128K | 9.41K | Dec 2011 – Aug 2026 |
| Gilbreath, S. O-10-2698 | Apache Corporation only | Howard Glasscock | Glasscock | 11 | 127K | 1.18K | by Jan 1993 – Nov 2011 |
| M. M. Edwards O-10-48124 | Sweet Crude Operating LLC only | Howard Glasscock (Consolidated) | Glasscock | 8 | 120K | 1.08K | Dec 2011 – Aug 2026 |
| Phillips, H. O-10-46386 | Apache Corporation only | Howard Glasscock (Consolidated) | Glasscock | 9 | 116K | 0 | Dec 2011 – Aug 2026 |
| Clay, H. R. O-10-47933 | Wash, Robert C. Inc. only | Howard Glasscock (Consolidated) | Glasscock | 20 | 112K | 121 | Dec 2011 – Jul 2026 |
| Glasscock 'M' Fee O-10-35083 | XTO Energy Inc. only | Powell (Penn) | Glasscock | 2 | 109K | 2.5M | Sep 1996 – Aug 2026 |
| Settles, W. R. -C- O-10-10806 | Conocophillips Company only | Howard Glasscock | Howard | 24 | 102K | 8.18K | by Jan 1993 – Nov 2011 |
| Glasscock Unit O-10-20535 | Parsley Energy Operations, LLC only | Garden City, W. (Wolfcamp 7880) | Glasscock | 2 | 102K | 230K | by Jan 1993 – Sep 2019 |
| Hall O-10-48123 | Sweet Crude Operating LLC only | Howard Glasscock (Consolidated) | Glasscock | 3 | 101K | 0 | Dec 2011 – Aug 2026 |
| Glasscock 'V' Fee O-10-34591 | Burk Royalty Co., Ltd. only | Conger (Leonard) | Glasscock | 2 | 101K | 111K | Jul 1995 – Aug 2026 |
| Glasscock -N- Fee O-10-40723 | XTO Energy Inc. only | Spraberry (Trend Area) | Glasscock | 10 | 89K | 69.7K | Nov 2010 – Aug 2026 |
| Glasscock Fee O-10-9348 | Pioneer Natural Res. USA, Inc. only | Spraberry (Trend Area) | Glasscock | 2 | 86.6K | 161K | by Jan 1993 – May 2015 |
| Edwards -C- O-10-2739 | Ashbrook Oil Co. only | Howard Glasscock | Glasscock | 4 | 86.5K | 21 | by Jan 1993 – Sep 2014 |
| Glasscock 'AJ' Fee O-10-35150 | Fagadau Energy Corporation only | Barbee (Fusselman) | Glasscock | 1 | 64.1K | 127K | Nov 1996 – Jul 1999 |
| Edwards O-10-2807 | Coronado Minerals, LLC only | Howard Glasscock | Glasscock | 4 | 61.1K | 4 | Feb 1993 – Oct 2011 |
| Turner, Sam O-10-2794 | Richmond Drilling Company, Inc. only | Howard Glasscock | Glasscock | 1 | 59.5K | 11.9K | by Jan 1993 – Oct 2014 |
| Glasscock -N- Fee G-10-139144 | XTO Energy Inc. only | Blalock Lake, SE (Wolfcamp) | Glasscock | 1 | 46.3K | 179K | by Jan 1993 – Feb 2009 |
| Roberts, Dora -a- & -B- O-10-2815 | 5H Oil Co., LLC only | Howard Glasscock | Glasscock | 19 | 45.8K | 32 | by Jan 1993 – Nov 2011 |
| Glasscock 'W' Fee O-10-33645 | Chevron U. S. A. Inc. only | Conger, SW (Penn) | Glasscock | 14 | 45.4K | 1.02M | by Jan 1993 – Jun 2006 |
| Chalk, Otis O-10-2737 | Apache Corporation only | Howard Glasscock | Howard | 6 | 42.8K | 11.6K | by Jan 1993 – Nov 2011 |
| Edwards -C- O-10-47984 | Sweet Crude Operating LLC only | Howard Glasscock (Consolidated) | Glasscock | 4 | 42.1K | 0 | Oct 2014 – Aug 2026 |
| Roberts, Dora, -B- O-10-19965 | 5H Oil Co., LLC only | Howard Glasscock | Glasscock | 10 | 41.2K | 33 | by Jan 1993 – Nov 2011 |
| Turner, Sam O-10-2712 | Coronado Minerals, LLC only | Howard Glasscock | Glasscock | 4 | 40.4K | 21 | by Jan 1993 – Oct 2011 |
| Glasscock 'AB' Fee O-10-39269 | Burk Royalty Co., Ltd. only | Conger, SW (Wolfcamp) | Sterling | 5 | 40.2K | 268K | Oct 2008 – Jan 2022 |
| Phillips, H. O. O-10-19869 | Coronado Minerals, LLC only | Howard Glasscock | Glasscock | 1 | 39.1K | 80 | by Jan 1993 – Oct 2011 |
| Glasscock 'V' Fee O-10-33562 | Texaco E & P Inc. only | Conger (Penn) | Glasscock | 15 | 35.9K | 912K | by Jan 1993 – Jul 1995 |