| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Schulein Robert | Oil & Gas Operator | Dec 1995 | |
| 2 | Simminger, Robert John Jr | Oil Operator | Sep 2025 | |
| 3 | Slawson Donald C | Wichita, KS 67202 | Oil & Gas Operator | Apr 2025 |
| 4 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 5 | Snow Oil Company | Nocona, TX 76255 | Oil Operator | Dec 2025 |
| 6 | Standard Operating Company | Wichita, KS 67205 | Oil & Gas Operator | Dec 2019 |
| 7 | Stoeppelwerth DR | Oil Operator | May 1993 | |
| 8 | Sutton Investmen | Oil Operator | Mar 1987 |