| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Sandstone Resources | Saint Joseph, MO 64506 | Oil & Gas Operator | Dec 1995 |
| 2 | Schreiner Oil & Gas Inc | Prescott, AZ 86303 | Oil & Gas Operator | Dec 2023 |
| 3 | Seneca Mineral Co Inc | Erie, PA 16509-4250 | Gas Operator | Dec 2002 |
| 4 | Seneca Resources Co LLC | Cranberry Township, PA 16066 | Oil & Gas Operator | Feb 2025 |
| 5 | Shelex Drilling Inc | Lexington, KY 40523 | Oil & Gas Operator | Dec 2024 |
| 6 | Simpson Gary H | Albion, PA 16401-8008 | Gas Operator | Dec 2014 |
| 7 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 8 | Stedman Energy Inc | Chautauqua, NY 14722 | Oil & Gas Operator | Dec 2024 |