| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 2 | Rains & Williams | Oil & Gas Operator | Nov 1995 | |
| 3 | Rains & Williamson Oil Co Inc | Wichita, KS 67277 | Oil & Gas Operator | Jun 2025 |
| 4 | Rama Operating Company Inc | Stafford, KS 67578 | Oil & Gas Operator | Oct 2025 |
| 5 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 6 | Range Oil Compan | Oil & Gas Operator | Nov 1995 | |
| 7 | Resource Operations Inc | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 8 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Jun 2025 |
| 9 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |