| 1 | S M K Energy Corporation | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Apr 2026 |
| 2 | Sabine Energy Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 3 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 4 | Sabine Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 5 | Sabine Pipe & Supply Co. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2004 |
| 6 | Sabine Pipe, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 7 | Salvador Oil, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 8 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 9 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 10 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 11 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 12 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 13 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Apr 2026 |
| 14 | Sbog, LLC | Granbury, TX 76048 | Oil & Gas Operator | Feb 2021 |
| 15 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 16 | Scheriger Production | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 17 | Scroggins, Bruce E. | Gilmer, TX 75645 | Oil & Gas Operator | Aug 2004 |
| 18 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 19 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 20 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 21 | Shappell Oil Company, L.L.C. | Harrisonburg, LA 71340 | Oil & Gas Operator | Apr 2026 |
| 22 | Shelby Operating Company | Dallas, TX 75205 | Oil & Gas Operator | Apr 2026 |
| 23 | Shelby, Michael H. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2026 |
| 24 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 25 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2026 |
| 26 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 2026 |
| 27 | Shivers, Linward, Operator | Shreveport, LA 71161 | Oil & Gas Operator | Sep 1997 |
| 28 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 29 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 30 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Apr 2026 |
| 31 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 32 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2026 |
| 33 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 34 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 35 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2026 |
| 36 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 37 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2026 |
| 38 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Apr 2026 |
| 39 | SM Operating Company LLC | Austin, TX 78709 | Oil & Gas Operator | Apr 2026 |
| 40 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 41 | Smith Operating & Management Co. | Shreveport, LA 71161 | Oil & Gas Operator | Feb 2005 |
| 42 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 43 | Smith Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2026 |
| 44 | Smith Resources, L.L.C. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2026 |
| 45 | Smith, E.N. III Energy Corp. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2006 |
| 46 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Jan 2026 |
| 47 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Feb 2026 |
| 48 | Sojitz Energy Venture, Inc. | Houston, TX 77042 | Oil & Gas Operator | Feb 2018 |
| 49 | Soldier Creek Energy, LLC | Edmond, OK 73013 | Oil & Gas Operator | Apr 2026 |
| 50 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 51 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 52 | Sonat Exploration Company-MCR | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 53 | Sonora Petroleum Corp. | Austin, TX 78734 | Oil & Gas Operator | Apr 2026 |
| 54 | Southerland, Glenn Oil & Gas Co. | Hallsville, TX 75650 | Oil & Gas Operator | Feb 2021 |
| 55 | Southern Crude, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2017 |
| 56 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 57 | Spartan Operating Company, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Feb 2013 |
| 58 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2026 |
| 59 | Sponte Operating, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 60 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 61 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Apr 2026 |
| 62 | Stuart Oil & Gas | Longview, TX 75606 | Oil & Gas Operator | Apr 2026 |
| 63 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2026 |
| 64 | Superior Royalty, LLC | Lindale, TX 75771 | Oil Operator | Apr 2026 |
| 65 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Apr 2026 |