| Starlord West O-10-56136 | OXY USA Inc. only | Spraberry (Trend Area) | Howard | 6 | 1.9M | 7.27M | Apr 2021 – Aug 2026 |
| Kloh O-10-2748 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 88 | 1.84M | 751 | by Jan 1993 – Nov 2011 |
| Starlord East O-10-56147 | OXY USA Inc. only | Spraberry (Trend Area) | Howard | 5 | 1.7M | 6.08M | Apr 2021 – Aug 2026 |
| Clay O-10-2750 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 37 | 865K | 415K | by Jan 1993 – Nov 2011 |
| Chalk, Otis O-10-18996 | Apache Corporation only | Howard-Glasscock (Glorieta) | Howard | 20 | 798K | 261K | by Jan 1993 – Nov 2011 |
| Chalk, Otis O-10-19011 | Tradition Resources LLC only | Howard-Glasscock (Glorieta) | Howard | 28 | 738K | 243K | by Jan 1993 – Nov 2011 |
| Chalk, Mary O-10-19033 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 29 | 642K | 188K | by Jan 1993 – Nov 2011 |
| Reed Bros. De O-10-19029 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 14 | 627K | 46K | by Jan 1993 – Nov 2011 |
| Chalk, G. O. -C- O-10-18989 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 13 | 560K | 29.4K | by Jan 1993 – Nov 2011 |
| Douthit, E. W., -De- O-10-19025 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 18 | 504K | 49.4K | by Jan 1993 – Nov 2011 |
| HMW O-10-34046 | Ozark Exploration, Inc. only | Zebulon, South (Fusselman) | Howard | 1 | 496K | 11 | Nov 1993 – Aug 2026 |
| 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 | by Jan 1993 – Nov 2011 |
| Douthit, E. W. -A- O-10-22380 | Cimarex Energy Co. of Colorado only | Howard Glasscock (Clear Fork,mi) | Howard | 4 | 392K | 2.71K | by Jan 1993 – Nov 2011 |
| Roberts, Dora O-10-19039 | Apache Corporation only | Howard-Glasscock (Glorieta) | Howard | 11 | 379K | 15.3K | by Jan 1993 – Nov 2011 |
| Forlorn Cowboy 14-23 O-10-56564 | Bayswater Operating Company LLC only | Spraberry (Trend Area) | Howard | 2 | 369K | 635K | Nov 2021 – Jul 2026 |
| Chalk-B Duncan O-10-31901 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 2 | 366K | 10.7K | by 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 | by Jan 1993 – Nov 2011 |
| Warder O-10-19002 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 7 | 301K | 2.92K | by Jan 1993 – Nov 2011 |
| Reed -A- O-10-19015 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 17 | 300K | 41.6K | by Jan 1993 – Nov 2011 |
| Grantham O-10-35695 | Ozark Exploration, Inc. only | Knott, West (Penn Reef) | Howard | 1 | 284K | 420K | Mar 1998 – Aug 2026 |
| Dolores Wolf 41-44 a Unit O-10-62585 | Highpeak Energy Holdings, LLC only | Spraberry (Trend Area) | Howard | 2 | 274K | 281K | Feb 2025 – Aug 2026 |
| Chalk -A- O-10-2749 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 16 | 267K | 164K | by Jan 1993 – Nov 2011 |
| Clay, H. R. -E- O-10-18993 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 24 | 267K | 2.36K | by Jan 1993 – Nov 2011 |
| Hall O-10-34092 | Ozark Exploration, Inc. only | Zebulon, South (Fusselman) | Howard | 1 | 256K | 10 | Dec 1993 – Aug 2026 |
| Chalk, Otis /EO/ O-10-2727 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 10 | 243K | 168K | by Jan 1993 – Nov 2011 |
| Chalk, G. O. -B- O-10-18988 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 10 | 242K | 37.3K | by Jan 1993 – Nov 2011 |
| Hooks O-10-19000 | Southwest Royalties, Inc. only | Howard-Glasscock (Glorieta) | Howard | 7 | 226K | 21 | by Jan 1993 – Nov 2011 |
| Chalk, Sloan O-10-19035 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 222K | 48.9K | by Jan 1993 – Nov 2011 |
| Douthit-B 1 O-10-19036 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 10 | 212K | 53.4K | by Jan 1993 – Nov 2011 |
| Chalk, G. O. O-10-18986 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 212K | 29.6K | by Jan 1993 – Nov 2011 |
| Chalk, G. O. O-10-2834 | Cimarex Energy Co. of Colorado only | Howard Glasscock | Howard | 21 | 211K | 13.6K | by Jan 1993 – Nov 2011 |
| Roberts, Dora -Bde- O-10-22386 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 19 | 208K | 42.2K | by Jan 1993 – Nov 2011 |
| Reed, W. N. & L. R. O-10-19016 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 15 | 205K | 37.2K | by Jan 1993 – Nov 2011 |
| Settles -D- O-10-18985 | Sheridan Production Company, LLC only | Howard-Glasscock (Glorieta) | Howard | 2 | 191K | 1.44K | by Jan 1993 – Nov 2011 |
| Quinn O-10-34314 | Ozark Exploration, Inc. only | Ernie Pinnell (Fusselman) | Howard | 1 | 189K | 0 | Oct 1994 – Mar 2017 |
| Chalk -A- O-10-31394 | Excel Energy Co. only | Howard-Glasscock (Glorieta) | Howard | 8 | 188K | 152 | by Jan 1993 – Nov 2011 |
| Chalk, G. O. O-10-19095 | Cimarex Energy Co. of Colorado only | Howard-Glasscock (Glorieta) | Howard | 12 | 185K | 7.85K | by Jan 1993 – Nov 2011 |
| Chalk, G. O. -D- O-10-18990 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 8 | 171K | 23.1K | by Jan 1993 – Nov 2011 |
| Taylor Guitar 19 O-10-47323 | Oxyrock Operating, LLC only | Spraberry (Trend Area) | Howard | 4 | 165K | 852K | Oct 2015 – Aug 2026 |
| Alexander 17 O-10-35031 | Ozark Exploration, Inc. only | Zebulon, North (Fusselman) | Howard | 1 | 154K | 12 | Jun 1996 – Aug 2026 |
| Chalk Estate O-10-19030 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 9 | 153K | 17.2K | by Jan 1993 – Nov 2011 |
| Chalk, Otis O-10-26950 | Keeley Oil, L.L.C. only | Howard-Glasscock (Glorieta) | Howard | 4 | 149K | 22 | by Jan 1993 – Aug 2014 |
| Clay, H. R. -A- O-10-18992 | Quantum Resources Management,llc only | Howard-Glasscock (Glorieta) | Howard | 11 | 143K | 5.33K | by Jan 1993 – Nov 2011 |
| Taylor O-10-42028 | OXY USA Inc. only | Spraberry (Trend Area) | Howard | 4 | 140K | 324K | Nov 2011 – Aug 2026 |
| Jones, Percy O-10-2906 | Baylor Operating, LLC only | Iatan, East Howard | Howard | 17 | 131K | 21 | by Jan 1993 – Jun 2020 |
| Douthit, E. W., -C- De O-10-19028 | Merit Energy Company only | Howard-Glasscock (Glorieta) | Howard | 11 | 129K | 25.2K | by Jan 1993 – Nov 2011 |
| Clanton, Clyde O-10-7083 | Platinum Exploration Inc. only | Vealmoor | Howard | 2 | 128K | 246K | by Jan 1993 – Sep 2002 |
| Douthit O-10-19014 | Conocophillips Company only | Howard-Glasscock (Glorieta) | Howard | 22 | 124K | 35.3K | by Jan 1993 – Nov 2011 |