| Chalk, Otis O-10-18996 | Apache Corporation only | Howard-Glasscock (Glorieta) | Howard | 20 | 798K | 261K | Jan 1993 – Nov 2011 |
| Chalk, Otis O-10-19011 | Tradition Resources LLC only | Howard-Glasscock (Glorieta) | Howard | 28 | 738K | 243K | Jan 1993 – Nov 2011 |
| Chalk, Mary O-10-19033 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 29 | 642K | 188K | Jan 1993 – Nov 2011 |
| Reed Bros. De O-10-19029 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 14 | 627K | 46K | Jan 1993 – Nov 2011 |
| Chalk, G. O. -C- O-10-18989 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 13 | 560K | 29.4K | Jan 1993 – Nov 2011 |
| Douthit, E. W., -De- O-10-19025 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 18 | 504K | 49.4K | Jan 1993 – Nov 2011 |
| Reed, L.R. & W.N. O-10-34841 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 8 | 426K | 26.8K | Dec 1995 – Nov 2011 |
| Chalk, G. O. -G- O-10-19031 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 20 | 423K | 80.2K | Jan 1993 – Nov 2011 |
| Roberts, Dora O-10-19039 | Apache Corporation only | Howard-Glasscock (Glorieta) | Howard | 11 | 379K | 15.3K | Jan 1993 – Nov 2011 |
| Chalk-B Duncan O-10-31901 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 2 | 366K | 10.7K | Jan 1993 – Nov 2011 |
| Howard Glasscock East Unit O-10-35608 | Apache Corporation only | Howard-Glasscock (Glorieta) | Howard | 67 | 314K | 21.9K | Jan 1998 – Nov 2011 |
| Chalk, G. O. -E- O-10-18991 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 11 | 310K | 64.3K | Jan 1993 – Nov 2011 |
| Warder O-10-19002 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 7 | 301K | 2.92K | Jan 1993 – Nov 2011 |
| Reed -A- O-10-19015 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 17 | 300K | 41.6K | Jan 1993 – Nov 2011 |
| Clay, H. R. -E- O-10-18993 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 24 | 267K | 2.36K | Jan 1993 – Nov 2011 |
| Chalk, G. O. -B- O-10-18988 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 10 | 242K | 37.3K | Jan 1993 – Nov 2011 |
| Hooks O-10-19000 | Southwest Royalties, Inc. only | Howard-Glasscock (Glorieta) | Howard | 7 | 226K | 21 | Jan 1993 – Nov 2011 |
| Chalk, Sloan O-10-19035 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 222K | 48.9K | Jan 1993 – Nov 2011 |
| Douthit-B 1 O-10-19036 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 10 | 212K | 53.4K | Jan 1993 – Nov 2011 |
| Chalk, G. O. O-10-18986 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 212K | 29.6K | Jan 1993 – Nov 2011 |
| Roberts, Dora -Bde- O-10-22386 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 19 | 208K | 42.2K | Jan 1993 – Nov 2011 |
| Reed, W. N. & L. R. O-10-19016 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 15 | 205K | 37.2K | Jan 1993 – Nov 2011 |
| Settles -D- O-10-18985 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 2 | 191K | 1.44K | Jan 1993 – Nov 2011 |
| Chalk -A- O-10-31394 | Excel Energy Co. only | Howard-Glasscock (Glorieta) | Howard | 8 | 188K | 152 | Jan 1993 – Nov 2011 |
| Chalk, G. O. O-10-19095 | Cimarex Energy Co. of Colorado only | Howard-Glasscock (Glorieta) | Howard | 12 | 185K | 7.85K | Jan 1993 – Nov 2011 |
| Chalk, G. O. -D- O-10-18990 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 8 | 171K | 23.1K | Jan 1993 – Nov 2011 |
| Chalk Estate O-10-19030 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 153K | 17.2K | Jan 1993 – Nov 2011 |
| Chalk, Otis O-10-26950 | Keeley Oil, L.L.C. only | Howard-Glasscock (Glorieta) | Howard | 4 | 149K | 22 | Jan 1993 – Aug 2014 |
| Clay, H. R. -A- O-10-18992 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 11 | 143K | 5.33K | Jan 1993 – Nov 2011 |
| Douthit, E. W., -C- De O-10-19028 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 11 | 129K | 25.2K | Jan 1993 – Nov 2011 |
| Douthit O-10-19014 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 22 | 124K | 35.3K | Jan 1993 – Nov 2011 |
| Owen-Chalk O-10-19034 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 13 | 122K | 21.2K | Jan 1993 – Nov 2011 |
| Roberts, Dora, -A- O-10-19023 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 8 | 108K | 3.58K | Jan 1993 – Oct 2011 |
| Settles, W. R. O-10-19040 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 4 | 100K | 127 | Jan 1993 – May 2009 |
| G.O. Chalk "F" O-10-33399 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 3 | 95.2K | 14.8K | Jan 1993 – Nov 2011 |
| Reed -B- O-10-19017 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 8 | 85.4K | 16.9K | Jan 1993 – Nov 2011 |
| Chalk, G. O. "A" O-10-18987 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 2 | 76.2K | 32.5K | Jan 1993 – Nov 2011 |
| Doris Chalk -A- O-10-26623 | Keeley Oil, L.L.C. only | Howard-Glasscock (Glorieta) | Howard | 2 | 70.7K | 22 | Jan 1993 – Nov 2011 |
| Chalk, Mary O-10-19046 | Legacy Reserves Operating LP only | Howard-Glasscock (Glorieta) | Howard | 4 | 69.5K | 21 | Jan 1993 – Nov 2011 |
| Hyman-Chalk O-10-19032 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 7 | 63.7K | 16.6K | Jan 1993 – Nov 2011 |
| Clay, H. R. -B- O-10-18999 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 10 | 59.4K | 2.83K | Jan 1993 – Nov 2011 |
| St. Louie O-10-19043 | Sahara Operating Company only | Howard-Glasscock (Glorieta) | Howard | 3 | 58.5K | 70 | Jan 1993 – Nov 2011 |
| Hyman, Sarah O-10-19037 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 6 | 56.6K | 10.1K | Jan 1993 – Nov 2011 |
| Settles, W. R. -A- O-10-18995 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 5 | 46.8K | 621 | Aug 1994 – Nov 2011 |
| Hyman -E- O-10-19006 | Big D Energy Company only | Howard-Glasscock (Glorieta) | Howard | 7 | 44.1K | 47 | Jan 1993 – Nov 2011 |
| Heusinger, A. R. O-10-19058 | Marathon Oil Company only | Howard-Glasscock (Glorieta) | Howard | 12 | 42.3K | 21 | Jan 1993 – Nov 1997 |
| Cooper O-10-19012 | Millennium Resources, LP only | Howard-Glasscock (Glorieta) | Howard | 5 | 41.2K | 39 | Jan 1993 – Nov 2014 |
| Scott, R. C. O-10-19055 | Marathon Oil Company only | Howard-Glasscock (Glorieta) | Howard | 8 | 40.1K | 54 | Jan 1993 – Sep 1996 |
| Scott, John O-10-19019 | Millennium Resources, LP only | Howard-Glasscock (Glorieta) | Howard | 4 | 37.5K | 39 | Jan 1993 – Nov 2014 |
| Clay, H. R. -C- O-10-25450 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 1 | 35.9K | 944 | Jan 1993 – Nov 2011 |