| 1 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Dec 2025 |
| 2 | S.E.D.I. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2015 |
| 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 | Dec 2025 |
| 7 | Sabine Syndicate No. 1 | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 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 | Dec 2025 |
| 12 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 13 | Sanders, Larry E. Trustee | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 14 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Dec 2025 |
| 15 | Sandridge Onshore, LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2014 |
| 16 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 17 | Scheriger Production | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 18 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 19 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 20 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Dec 2025 |
| 21 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 22 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 23 | Secondary Oil Corp., Inc. | Austin, TX 78750 | Oil Operator | Apr 1999 |
| 24 | Sei Operating, LLC | Mandeville, LA 70471 | Oil & Gas Operator | Dec 2025 |
| 25 | Shappell Oil Company, L.L.C. | Harrisonburg, LA 71340 | Oil & Gas Operator | Dec 2025 |
| 26 | Shelby Production Co. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2009 |
| 27 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 28 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 29 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Aug 2025 |
| 30 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 31 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 32 | Shore Production Co. | Longview, TX 75604 | Oil & Gas Operator | Aug 2005 |
| 33 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 34 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 35 | Sikes Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2003 |
| 36 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 37 | Simples Oil International, LLC | Los Angeles, CA 90067 | Oil & Gas Operator | Dec 2025 |
| 38 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 39 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 40 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Dec 2025 |
| 41 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 42 | Smal Energy Corp | Tyler, TX 75710 | Oil & Gas Operator | Oct 1995 |
| 43 | Smith Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Dec 2025 |
| 44 | Smith, E. J. | Fort Worth, TX 76137 | Oil & Gas Operator | Dec 2025 |
| 45 | Smith, E.N. III Energy Corp. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2006 |
| 46 | Smith, R. E. Interests, Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 1998 |
| 47 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 48 | Sojitz Energy Venture, Inc. | Houston, TX 77042 | Oil & Gas Operator | Feb 2018 |
| 49 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 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 | Sonora Petroleum Corp. | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 53 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 54 | Southlake Operating LLC | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 55 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Dec 2025 |
| 56 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 57 | Speegle Oil And Gas Company | Longview, TX 75605 | Oil & Gas Operator | Dec 2025 |
| 58 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 59 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 60 | Stephens, Glynn | Overton, TX 75684 | Oil & Gas Operator | Oct 2001 |
| 61 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 62 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 63 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 64 | Strebor Oil Co. | Dallas, TX 75225 | Oil & Gas Operator | Jun 1993 |
| 65 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 66 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Dec 2025 |
| 67 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | Dec 2025 |
| 68 | Summit Energy,Inc | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 69 | Summit Resources MGMT., LLC. | Edmond, OK 73083 | Oil & Gas Operator | Dec 2025 |
| 70 | Sundance Resources, Inc. | Rio VIsta, TX 76093 | Oil & Gas Operator | Mar 2012 |
| 71 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 72 | Superior Royalty, LLC | Lindale, TX 75771 | Oil Operator | Dec 2025 |
| 73 | Supreme Energy Company, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 74 | SW Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2000 |
| 75 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |