| 1 | Safari Production Company, Inc. | McAllen, TX 78501 | Oil & Gas Operator | Jun 2025 |
| 2 | Saga Petroleum Corp. | Midland, TX 79701 | Oil & Gas Operator | Mar 2008 |
| 3 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 4 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 5 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 6 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 7 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 8 | Santos USA Corp. | Houston, TX 77042 | Oil & Gas Operator | Dec 2008 |
| 9 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 10 | Shoco Production LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 11 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 12 | Smith Production Inc. | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2025 |
| 13 | South Leeville, LLC | Houston, TX 77069 | Oil & Gas Operator | Oct 2022 |
| 14 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 15 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Jun 2025 |
| 16 | Suemaur Expl. & Prod., LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 17 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 18 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 19 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 20 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 21 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |