| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | R. J. Oil Co. | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 2 | Ramoil Company | Winfield, KS 67156 | Oil & Gas Operator | May 1987 |
| 3 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 4 | Range Oil Compan | Oil & Gas Operator | Nov 1995 | |
| 5 | Reata Petroleum LLC | Independence, KS 67301 | Oil & Gas Operator | Jun 2025 |
| 6 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Jun 2025 |
| 7 | Remington Financ | Oil Operator | Oct 1994 | |
| 8 | Rhoads, Mark | Seminole, OK 74868 | Oil Operator | Sep 1999 |