| 1 | Nadel And Gussman Rockies, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2012 |
| 2 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 3 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 4 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 5 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
| 6 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 7 | Navigation Powder River LLC | Houston, TX 77024 | Oil & Gas Operator | Aug 2025 |
| 8 | Neward Corporation | FT. Worth, TX 76102 | Oil & Gas Operator | Dec 1997 |
| 9 | Newport Gas Partners LLC | Gillette, WY 82716 | Oil & Gas Operator | May 2025 |
| 10 | Nicolaysen G G Jr | | Oil & Gas Operator | Dec 1995 |
| 11 | Nicor Exploration | | Oil Operator | Jul 1993 |
| 12 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 13 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 14 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 15 | Nonsuch Natural Gas Inc | Naples, FL 34108 | Oil & Gas Operator | Jun 2025 |
| 16 | Norcen Energy Inc | | Oil Operator | Dec 1989 |
| 17 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Oct 2025 |
| 18 | North Finn LLC | Casper, WY 82605 | Oil & Gas Operator | Aug 2025 |
| 19 | Northern Production Co | Gillette, WY 82717 | Oil & Gas Operator | Apr 2013 |
| 20 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 21 | Norton Frickey | Lakewood, CO 80215 | Oil & Gas Operator | Dec 2023 |
| 22 | Nova Energy Inc | Casper, WY 82601 | Oil & Gas Operator | Oct 2020 |