| 101 | National Onshore LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 102 | National Petrole | | Oil & Gas Operator | Dec 1996 |
| 103 | National Petroleum Reserves, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2012 |
| 104 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
| 105 | National Surface & Minerals, LLC | Addison, TX 75001 | Gas Operator | Jan 2023 |
| 106 | National Treasure Mines | San Marina, CA 91118 | Oil Operator | Dec 1998 |
| 107 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jan 2025 |
| 108 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 109 | Nativity Of Our Lord | Orchard Park, NY 14127 | Gas Operator | Dec 2023 |
| 110 | Natl Fuel Gas Supply Corp | Williamsville, NY 14221-5887 | Oil & Gas Operator | Dec 2009 |
| 111 | Natland Energy Corp | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 1996 |
| 112 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 113 | Natomas-McCormick-Coastal | | Oil & Gas Operator | Feb 1984 |
| 114 | Natrona County Holdings LLC | Austin, TX 78701 | Oil & Gas Operator | Nov 2020 |
| 115 | Natural Capital LLC | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2009 |
| 116 | Natural Energy Dev Corp | Pittsburgh, PA 15241-1548 | Oil & Gas Operator | Dec 2018 |
| 117 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 118 | Natural Gas & Oi | | Gas Operator | Dec 1987 |
| 119 | Natural Gas & Oil, Inc. | Fayette, AL 35555 | Oil & Gas Operator | Jan 2025 |
| 120 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 121 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 122 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 123 | Natural Gas Corp Of Ca | Vernal, UT 84078 | Oil & Gas Operator | Jun 1989 |
| 124 | Natural Gas Corp Of California | Vernal, UT 84078 | Oil & Gas Operator | Dec 1989 |
| 125 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 126 | Natural Gas Expl | | Oil & Gas Operator | Jul 1990 |
| 127 | Natural Gas MKTG. & Storage Co. | Houston, TX 77251 | Oil & Gas Operator | Sep 1996 |
| 128 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 129 | Natural Gas Pipeline Co Of Amer. | Houston, TX 77002 | Gas Operator | Jul 2008 |
| 130 | Natural Gas Processing Company | Worland, WY 82401 | Oil & Gas Operator | Feb 2025 |
| 131 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 132 | Natural Gas Systems, Inc. | | Oil & Gas Operator | Dec 2002 |
| 133 | Natural Oil & Gas Corp | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 134 | Natural Petroleum Company | Overton, TX 75684 | Oil & Gas Operator | Jun 1994 |
| 135 | Natural Progression Oil & Gas Corp | Stillwater, OK 74075 | Oil & Gas Operator | Feb 2025 |
| 136 | Natural Reserves Group, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1993 |
| 137 | Natural Resource Corporation | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1983 |
| 138 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 139 | Natural Resource MGMT. Corp. | | Oil & Gas Operator | Jun 1989 |
| 140 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 141 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2025 |
| 142 | Nautilus Exploration LLC | Denver, CO 80218 | Oil Operator | Mar 2011 |
| 143 | Nautilus Exploration, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Nov 2021 |
| 144 | Nautilus Poplar LLC | Poplar, MT 59255 | Oil Operator | Jan 2025 |
| 145 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Apr 2025 |
| 146 | Navajo Nation Oil & Gas Co | Window Rock, AZ 86511 | Oil & Gas Operator | Oct 2012 |
| 147 | Navajo Oil Company | Wichita, KS 67206 | Gas Operator | May 2011 |
| 148 | Navalo | Rockdale, TX 76567 | Oil Operator | Apr 2025 |
| 149 | Navarro Exploration Co., Inc. | Kingwood, TX 77345 | Oil & Gas Operator | Apr 2025 |
| 150 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 151 | Navarro Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 152 | Navasota Resources LTD. | | Oil & Gas Operator | Sep 2002 |
| 153 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Jan 2025 |
| 154 | Navidad Resources, LLC | Bullard, TX 75757 | Oil & Gas Operator | Apr 2025 |
| 155 | Navigation Powder River LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 156 | Navitas Land And Mineral Development, LLC | | Oil Operator | Dec 2016 |
| 157 | Navitas Oil & Gas LLC | | Gas Operator | Dec 2012 |
| 158 | Navitas Resources, LLC | | Oil & Gas Operator | May 2016 |
| 159 | Navus Operating, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 160 | Naylor Operating Company LLC | Perryton, TX 79079-9703 | Oil & Gas Operator | Sep 2012 |
| 161 | Naylor-Pritchard | | Oil Operator | Jul 1987 |
| 162 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Apr 2025 |
| 163 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 164 | NBX Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 165 | NC Oil Company, Inc. | Humboldt, KS 66748 | Oil Operator | Dec 2024 |
| 166 | Ncec, Inc. | Winnsboro, TX 75494 | Oil & Gas Operator | May 1994 |
| 167 | Ncey Holdings, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2013 |
| 168 | NCL Midstream Corp | The Woodlands, TX 77380-3105 | Oil & Gas Operator | Nov 2006 |
| 169 | NCL Natural Resources LLC | Spring, TX 77381-5261-5261 | Oil & Gas Operator | Dec 2017 |
| 170 | NCM Operations, Inc. | | Oil Operator | Oct 2000 |
| 171 | NCX Company, Inc. | | Oil & Gas Operator | Aug 1999 |
| 172 | Nea Cross Inc | Erie, PA 16508-2769 | Gas Operator | Dec 1991 |
| 173 | Neal Lloyd Wayne | Sapulpa, OK 74066-8216 | Oil Operator | Jan 2021 |
| 174 | Neal, Jack Engineering, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Feb 2011 |
| 175 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Apr 2025 |
| 176 | Neas Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2011 |
| 177 | Neas Operating, LLC | Wimberley, TX 78676 | Oil & Gas Operator | Apr 2025 |
| 178 | Neatherlin, Earl Inc. | Avoca, TX 79503 | Oil & Gas Operator | Apr 2025 |
| 179 | Nebo Operating Company | | Oil & Gas Operator | Apr 1991 |
| 180 | Nec Operating - Kansas, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2024 |
| 181 | Nec Operating, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2025 |
| 182 | Necessity Well Service | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 1994 |
| 183 | Necessity Well Service, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2006 |
| 184 | Neches Exploration, L.L.C. | Flint, TX 75762 | Oil & Gas Operator | Apr 2025 |
| 185 | Neches Oil & Gas Company, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 186 | Neches Transport Inc. | Spurger, TX 77660 | Oil & Gas Operator | Apr 2025 |
| 187 | Neckers, Barry And Kathy | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 188 | Neeb, H. L. | Abilene, TX 79606 | Oil & Gas Operator | Jul 1994 |
| 189 | Needham Resources, Inc. | | Oil & Gas Operator | Jan 1998 |
| 190 | Neeley, June | Mineral Wells, TX 76067 | Oil & Gas Operator | Feb 2008 |
| 191 | Neely, H. K. | Abilene, TX 79604 | Oil & Gas Operator | Dec 1995 |
| 192 | Neely, Steven A. | | Gas Operator | Dec 2021 |
| 193 | Nees, Gordon III | Graham, TX 76450 | Oil & Gas Operator | Jun 2002 |
| 194 | Neet Transport Co., Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Apr 2025 |
| 195 | Neff, Harold & Associates, Inc. | Tyler, TX 75702 | Oil & Gas Operator | May 2008 |
| 196 | Neff, Inc. | Albany, TX 76430 | Oil & Gas Operator | Dec 2018 |
| 197 | Neff, Mickey Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Jul 2023 |
| 198 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2024 |
| 199 | Nei Production, Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 200 | Neilco | | Oil & Gas Operator | Nov 2024 |