| Geye G-8-246776 | Interstate Explorations LLC only | Brown Co. Regular (Marble Falls) | Brown | 1 | 8.04K | 258K | Dec 2008 – Apr 2026 |
| Stone Jennie G-8-63463 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 1.85K | 57.9K | Jan 1993 – Apr 2026 |
| Pitcock Cattle Company "C" G-8-115128 | Pitcock, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 1.75K | 78.6K | Jan 1993 – Apr 2026 |
| Chandler, Francis G-8-168234 | Arnot, W. G., Jr. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 1.05K | 24.3K | Jun 1998 – Apr 2000 |
| Williams H.C. -B- G-8-63664 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 991 | 60.8K | Jul 2001 – Apr 2026 |
| Thompson G-8-101989 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 968 | 178K | Jan 1993 – Apr 2026 |
| West Marion E. G-8-68995 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 848 | 270K | Dec 1996 – Apr 2026 |
| Kilgore, W. F. G-8-57440 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 614 | 60K | Jan 1993 – Apr 2026 |
| Allcorn, H. L., et Al G-8-35109 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 455 | 31.8K | Jan 1993 – Apr 2026 |
| Holt, C. F. G-8-31879 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 355 | 209K | Jan 1993 – Apr 2026 |
| Madison, Frank H. "F" G-8-83791 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 299 | 113K | Jan 1993 – Apr 2026 |
| Bucy "A" G-8-90047 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 270 | 122K | Jan 1993 – Apr 2026 |
| Thompson G-8-101988 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 249 | 139K | Jan 1993 – Apr 2026 |
| Williams H.C.-B- G-8-58620 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 219 | 21K | Feb 1996 – Jan 2011 |
| Golson, N.A. G-8-95584 | CWC Oil & Gas, LLC only | Brown Co. Regular (Marble Falls) | Brown | 1 | 192 | 208K | May 1994 – Apr 2026 |
| Bibby, J.C. G-8-91754 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 186 | 43.8K | Jan 1993 – Mar 2021 |
| Newton, L.E. G-8-75985 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 174 | 22.5K | Jan 1993 – Apr 2026 |
| Fergerson G-8-17437 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 172 | 70K | Feb 1993 – Sep 2021 |
| Watkins, C. P. G-8-82462 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 160 | 133K | Jan 1993 – Apr 2026 |
| Wynn G-8-86468 | Mission Energy Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 155 | 90.9K | Jan 1993 – Feb 2020 |
| Thompson G-8-101990 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 136 | 105K | Jan 1993 – Apr 2026 |
| Newton, L.E. G-8-75986 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 132 | 40.6K | Jan 1993 – Apr 2026 |
| East Grosvenor G-8-166490 | Shady Oil Co. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 129 | 690 | Nov 1997 – May 2007 |
| Culberson G-8-95422 | Shady Oil Co. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 125 | 209K | Mar 1993 – Mar 2026 |
| Madison "B" G-8-65705 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 114 | 256K | Jan 1993 – Apr 2026 |
| Turner, J. B. G-8-100315 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 110 | 13.7K | Jan 1993 – Dec 2019 |
| Bibby, J.C. G-8-93668 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 99 | 40K | Jan 1993 – May 2013 |
| Russell G-8-249648 | Creek Energy, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 81 | 108K | Nov 2009 – Apr 2026 |
| Day Dolores G-8-62075 | Reach Oil only | Brown Co. Regular (Marble Falls) | Brown | 1 | 71 | 76 | Aug 2014 – Jan 2017 |
| Day Dolores G-8-62074 | Reach Oil only | Brown Co. Regular (Marble Falls) | Brown | 1 | 68 | 73 | Aug 2014 – Jan 2017 |
| Bucy, Bettie G-8-101002 | Reach Oil only | Brown Co. Regular (Marble Falls) | Brown | 1 | 61 | 27.2K | Jan 1993 – Oct 2023 |
| Bucy, Bettie G-8-101003 | Reach Oil only | Brown Co. Regular (Marble Falls) | Brown | 1 | 60 | 27.2K | Jan 1993 – Oct 2023 |
| Ford, Henry M. G-8-96301 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 52 | 203K | Jan 1993 – Apr 2026 |
| Petross T.L. G-8-62690 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 51 | 25K | Jan 1993 – Aug 2013 |
| Williams,j. S. G-8-36712 | Gas Corporation of America only | Brown Co. Regular (Marble Falls) | Brown | 1 | 50 | 55K | Jan 1993 – Jul 2009 |
| Day Dolores G-8-61945 | Reach Oil only | Brown Co. Regular (Marble Falls) | Brown | 1 | 47 | 4.69K | Oct 1993 – Jan 2017 |
| Mahaffey,verdna G-8-110487 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 40 | 74K | Jan 1993 – Apr 2026 |
| Beck, J. G-8-92532 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 40 | 59.4K | Jan 1993 – Apr 2026 |
| Bowen,a.j. G-8-121380 | Subsurface Production, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 31 | 5.1K | Jan 1993 – Dec 2020 |
| OXY-Emmons G-8-130053 | Double Play Oil & Gas, Inc only | Brown Co. Regular (Marble Falls) | Brown | 1 | 28 | 20.2K | Jan 1993 – Sep 2023 |
| McCleery G-8-85889 | McIver, Terry L. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 28 | 4.67K | Mar 1993 – Jan 1998 |
| Byler, H. G-8-130054 | Ringo Rig LLC only | Brown Co. Regular (Marble Falls) | Brown | 1 | 17 | 26.1K | Jan 1993 – Dec 2019 |
| McCleery, Melvin G-8-84761 | McIver, Terry L. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 10 | 3.49K | Jan 1993 – Jan 1998 |
| Mitchell, L. P. G-8-121053 | R & D Operating, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 7 | 83.6K | Jan 1993 – Apr 2018 |
| Pitcock Cattle Company "C" G-8-128074 | Pitcock, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 2 | 55.6K | Jan 1993 – Mar 2023 |
| Pitcock Cattle Company "C" G-8-252148 | Pitcock, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 1 | 28K | Jul 2009 – Apr 2026 |
| Levie Old "A" G-8-86149 | Bob Hughes Oil Company, LLC only | Brown Co. Regular (Marble Falls) | Brown | 1 | 1 | 50.6K | Jan 1993 – Mar 2026 |
| Roberts, Lee G-8-40955 | R & D Operating, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 0 | 10.8K | Jan 1993 – Apr 2018 |
| Matson, P. I. G-8-38631 | Davis, Don H. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 0 | 0 | — |
| Williams, H. C. G-8-38488 | Southwest Gas Systems, Inc. only | Brown Co. Regular (Marble Falls) | Brown | 1 | 0 | 85.1K | Jan 1993 – Apr 2026 |