| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | S & J Oil | Hays, KS 67601 | Oil Operator | Feb 2002 |
| 2 | Sabre Exploratio | Oil Operator | Oct 1988 | |
| 3 | Scheck Oil Operation | Oil & Gas Operator | Dec 2025 | |
| 4 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Jan 2026 |
| 5 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 6 | Slawson Donald C | Wichita, KS 67202 | Oil & Gas Operator | Oct 2025 |
| 7 | Slawson Explorat | Oil & Gas Operator | Dec 1996 | |
| 8 | Stanlee Oil LLC | Oil Operator | Dec 2025 | |
| 9 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Dec 2025 |
| 10 | Sunburst Explora | Oil Operator | May 1990 |