| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S&G Oil LLC | Wichita Falls, TX 76309 | Oil & Gas Operator | Apr 2024 |
| 3 | Sabio Oil & Gas Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 4 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 5 | Saddle Creek Energy Development | Dallas, TX 75251 | Oil & Gas Operator | Nov 2008 |
| 6 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 7 | Sage Oil And Gas, LLC | Graham, TX 76450 | Gas Operator | Apr 2024 |
| 8 | Saguaro Petroleum, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 9 | Sanco Operating Company | Bullard, TX 75757 | Oil & Gas Operator | Apr 2024 |
| 10 | Sanders Oil & Gas, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Aug 2015 |
| 11 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 12 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 13 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 14 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Jan 2024 |
| 15 | Share Petroleum Corp. | Mabank, TX 75147 | Oil Operator | Apr 2024 |
| 16 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Apr 2024 |
| 17 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 18 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2024 |
| 19 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 20 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2024 |
| 21 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 22 | Snow Operating Co., Inc. | Haltom City, TX 76117 | Oil & Gas Operator | Feb 2024 |
| 23 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 24 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 25 | Southern Tejas Asset Group LLC | McAllen, TX 78501 | Oil & Gas Operator | Apr 2024 |
| 26 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Gas Operator | Apr 2024 |
| 27 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 28 | Spragins, Ed | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 29 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2024 |
| 30 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Apr 2024 |
| 31 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Apr 2024 |
| 32 | Stelucan Energy, LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2024 |
| 33 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 34 | Stonebriar Oil LLC | Frisco, TX 75034 | Oil & Gas Operator | Apr 2024 |
| 35 | Stovall Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 36 | Strata Operating, Inc. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Apr 2024 |
| 37 | Stratagas, Inc. | Rowlett, TX 75088 | Oil & Gas Operator | May 2006 |
| 38 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 39 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 40 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 41 | Suborp Energy, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2000 |
| 42 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 43 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 44 | Sunrise Enterprises | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 45 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Apr 2024 |
| 46 | Swan PC, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 47 | Swan Production Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2009 |