| 1 | Schrecengost Fred M | Sligo, PA 16255-0216 | Oil & Gas Operator | Dec 2016 |
| 2 | Seneca Resources Co LLC | Cranberry Township, PA 16066 | Oil & Gas Operator | Feb 2024 |
| 3 | Shawmut Production Corporation | Pittsburgh, PA 15219-1913 | Oil & Gas Operator | Jan 2003 |
| 4 | SK Opr Inc | Cabot, PA 16023-1250 | Gas Operator | Dec 2023 |
| 5 | Sme Well SVC Inc | Herman, PA 16039-0156 | Oil & Gas Operator | Dec 2023 |
| 6 | Snyder Bros Inc | Kittanning, PA 16201 | Oil & Gas Operator | Feb 2024 |
| 7 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 8 | Somerset Oil & Gas Company | Portland, TX 78374 | Oil & Gas Operator | Dec 2006 |
| 9 | Star Energy Inc | Dayton, PA 16222-4325 | Oil & Gas Operator | Dec 2023 |
| 10 | Stephenson Group Natural Gas Co | Smicksburg, PA 16256-1710 | Gas Operator | Dec 2020 |
| 11 | Stephenson Mark M | Smicksburg, PA 16256-1710 | Gas Operator | Dec 2009 |
| 12 | Stewart Inc | Ringling, OK 73456 | Oil & Gas Operator | Feb 2024 |
| 13 | Stryker Energy LLC | Mayfield VIllag, OH 44143 | Oil & Gas Operator | Dec 2018 |
| 14 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |