| 1 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 2 | Salt Creek Energy Company LLC | Shawnee, OK 74802-1505 | Oil & Gas Operator | Jan 2024 |
| 3 | Salty Dog Disposal LLC | | Oil Operator | Mar 2024 |
| 4 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 5 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 6 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 7 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Jan 2024 |
| 8 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2024 |
| 9 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 10 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 11 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 12 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 13 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 14 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 15 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 16 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 17 | Six "E" Trading Company | Allen, OK 74825-0346 | Oil & Gas Operator | Sep 2020 |
| 18 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 19 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 20 | SSB Production LC | Ardmore, OK 73402-0998 | Oil & Gas Operator | Feb 2024 |
| 21 | Stokes Donna L | Blanchard, OK 73010-0364 | Oil & Gas Operator | Jun 2023 |
| 22 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 23 | Stricker Resources Inc | Okmulgee, OK 74447-0773 | Oil & Gas Operator | Nov 2023 |
| 24 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 25 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 26 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |