| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 2 | Natural Resource MGMT. Corp. | Oil & Gas Operator | Jun 1989 | |
| 3 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2017 |
| 4 | Nerco Oil & Gas, Inc. | Oil & Gas Operator | Dec 1996 | |
| 5 | Nicco Operating Co. | Oil & Gas Operator | May 1990 | |
| 6 | Nuex Operating, Inc. | Oil Operator | Oct 2004 |