| 1 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Sep 2025 |
| 2 | Saber Oil & Gas Ventures, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 3 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2025 |
| 4 | Saga Pet. LTD Liability Co Of Co | Midland, TX 79701 | Oil & Gas Operator | Apr 2004 |
| 5 | Saga Petroleum Corp. | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 6 | Saga Petroleum LLC Of Colorado | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 7 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Sep 2025 |
| 8 | Sagebrush Oilandgas Company,LLC | Midland, TX 79701 | Oil & Gas Operator | Mar 2010 |
| 9 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Sep 2025 |
| 10 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 11 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 12 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 13 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2025 |
| 14 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 15 | Sanco Operating Company | Bullard, TX 75757 | Oil & Gas Operator | Sep 2025 |
| 16 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Sep 2025 |
| 17 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 18 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 19 | Sapient Energy Corp | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2002 |
| 20 | Satanta Oil Company | Midland, TX 79704 | Oil & Gas Operator | Sep 2025 |
| 21 | SDG Resources L.P. | Montrose, CO 81402 | Oil & Gas Operator | May 2006 |
| 22 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 23 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 24 | Seanard Energy Company | Baton Rouge, LA 70808 | Oil & Gas Operator | Jul 2002 |
| 25 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 26 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 27 | Shell Western E&P | Houston, TX 77001 | Oil & Gas Operator | Sep 2025 |
| 28 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 29 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 30 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | Sep 2025 |
| 31 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 32 | Sierra Madre Natural Res., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 33 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 34 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 35 | Simon, W. D. Oil Co. | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 36 | Six-S Properties, Inc. | Austin, TX 78767 | Oil & Gas Operator | Sep 2025 |
| 37 | Slack, R. C. | Pecos, TX 79772 | Oil & Gas Operator | Jul 2000 |
| 38 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 39 | Smith & Marrs Inc. | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2021 |
| 40 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 41 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 42 | Southwest-Operating | Penwell, TX 79776 | Oil & Gas Operator | Sep 2025 |
| 43 | Space Production Inc. | Monahans, TX 79756 | Oil & Gas Operator | Sep 2025 |
| 44 | Spenergy Corp. | Midland, TX 79701 | Oil & Gas Operator | Dec 1999 |
| 45 | Spindletop Drilling Co. | Dallas, TX 75230 | Oil & Gas Operator | Sep 2025 |
| 46 | Spiral Energy Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2019 |
| 47 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 48 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 49 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 50 | Starrak Operating Company, Inc. | Midland, TX 79706 | Oil & Gas Operator | Jun 1999 |
| 51 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 52 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 53 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 54 | Steward Energy, LLC | Frisco, TX 75034 | Oil & Gas Operator | Nov 2014 |
| 55 | Stivers Inc | Graham, TX 76450 | Oil & Gas Operator | May 2003 |
| 56 | Stivers Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 1995 |
| 57 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 58 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Sep 2025 |
| 59 | Stronghold Energy II Oper, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2022 |
| 60 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Sep 2025 |
| 61 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Sep 2025 |
| 62 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 63 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |