| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | National Coopera | Oil & Gas Operator | Mar 1992 | |
| 2 | National Petrole | Oil & Gas Operator | Dec 1996 | |
| 3 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Dec 2023 |
| 4 | North Plains Oil | Oil Operator | Jul 1990 |