| 1 | Saddle Creek Energy Development | Dallas, TX 75251 | Oil & Gas Operator | Nov 2008 |
| 2 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2026 |
| 3 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2026 |
| 4 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 5 | Seven F Operating Inc. | New Braunfels, TX 78131 | Gas Operator | Jul 2026 |
| 6 | Shelby Operating Company | Dallas, TX 75205 | Oil & Gas Operator | Jul 2026 |
| 7 | Shelby, Michael H. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2026 |
| 8 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Jul 2026 |
| 9 | Shoreline Energy Partners, LLC | Chandler, AZ 85249 | Oil Operator | May 2011 |
| 10 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jul 2026 |
| 11 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 12 | Smith, Joe H. | Argyle, TX 76226 | Oil & Gas Operator | Nov 1998 |
| 13 | Spade Energy L.L.C. | Fort Worth, TX 76177 | Oil & Gas Operator | Jul 2026 |
| 14 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2026 |
| 15 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Jul 2026 |
| 16 | Stephens, Hayseed Oil Inc. | Weatherford, TX 76087 | Oil & Gas Operator | Mar 2008 |
| 17 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 18 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 19 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |