| 201 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 202 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 203 | North Central Casing Pullers,Inc | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 204 | North Central Oil Corp. | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 205 | North Central Texas Energy LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 206 | North Country Energy LLC | Amarillo, TX 79159 | Oil & Gas Operator | Apr 2025 |
| 207 | North Fork Operating LP | Mustang, OK 73064 | Oil & Gas Operator | Apr 2025 |
| 208 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Apr 2025 |
| 209 | North Operating Company | Canton, TX 75103 | Oil & Gas Operator | Apr 2025 |
| 210 | North Padre Explor. Venture LLC | Corpus Chrsti, TX 78473 | Oil & Gas Operator | May 2004 |
| 211 | North Ridge Corporation | Duncanville, TX 75137 | Oil & Gas Operator | Apr 2025 |
| 212 | North Shore Energy, L.L.C. | Austin, TX 78750 | Oil & Gas Operator | Apr 2025 |
| 213 | North South Oil, LLC | Luling, TX 78648 | Oil Operator | Apr 2025 |
| 214 | North Star Energy, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Jan 2010 |
| 215 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 216 | North Texas Energy,Inc. | Dallas, TX 75252 | Oil Operator | Apr 2025 |
| 217 | North Texas Engineering | Midland, TX 79710 | Oil & Gas Operator | Nov 2002 |
| 218 | North Texas Llano Operating Corp | Dallas, TX 75225 | Oil & Gas Operator | Apr 2025 |
| 219 | North Texas Oil & Gas, LLC | Edmond, OK 73013 | Oil & Gas Operator | Apr 2025 |
| 220 | North Texas Plugging, LLC | Denton, TX 76205 | Oil & Gas Operator | Apr 2025 |
| 221 | North Texas Pure Gold, LLC | Graham, TX 76450 | Oil Operator | Sep 2008 |
| 222 | Northamerican Service Group | Katy, TX 77449 | Oil & Gas Operator | Apr 2025 |
| 223 | Northcutt Production | Bangs, TX 76823 | Oil & Gas Operator | Apr 2025 |
| 224 | Northeast Texas Production Co. | Marshall, TX 75671 | Oil & Gas Operator | Apr 2025 |
| 225 | Northern Pacific Oil And Gas Incorporated | Houston, TX 77024 | Oil & Gas Operator | Dec 2022 |
| 226 | Northfield Enterprises | Bryan, TX 77805 | Oil & Gas Operator | Dec 1993 |
| 227 | Northfield Enterprises, Inc. | Bryan, TX 77805 | Oil & Gas Operator | Apr 2025 |
| 228 | Northfork Exploration LLC | Electra, TX 76360 | Oil Operator | Apr 2025 |
| 229 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 230 | Northland Petroleum, Inc. | Houston, TX 77043 | Oil Operator | Dec 2018 |
| 231 | Northland Petroleum, LLC | Houston, TX 77043 | Oil Operator | Apr 2025 |
| 232 | Northridge Exploration, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 233 | Northridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 234 | Northstar Gulfsands, LLC | Houston, TX 77046 | Oil & Gas Operator | Mar 2006 |
| 235 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 236 | Northwest Airport Management, LP | Spring, TX 77379 | Gas Operator | Apr 2025 |
| 237 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 238 | Northwind Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1995 |
| 239 | Norton Drilling Co. | Levelland, TX 79336 | Oil & Gas Operator | Nov 2001 |
| 240 | Norvel Douglas Oil Inc. | H SPG NTL PK, AR 71909 | Oil Operator | Apr 2025 |
| 241 | Norwood, A. N., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 242 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2025 |
| 243 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 244 | Novco Operating Company | Novice, TX 79538 | Oil & Gas Operator | Apr 2025 |
| 245 | Novo Energy Resources | Houston, TX 77006 | Oil & Gas Operator | Apr 2025 |
| 246 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 247 | Novus Oil & Gas, LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2005 |
| 248 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Feb 2025 |
| 249 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 250 | Noxxe Oil And Gas, LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 251 | NRG Assets Management, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2016 |
| 252 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 253 | NRPC Operating, LLC | Dallas, TX 75206 | Oil Operator | Feb 2012 |
| 254 | NT Minerals, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 255 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 256 | Nueces Oil Company | George West, TX 78022 | Oil & Gas Operator | Mar 2008 |
| 257 | Nueces Petroleum Corporation | Sugar Land, TX 77496 | Oil Operator | Apr 2025 |
| 258 | Nueces Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2002 |
| 259 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 260 | Nuevo Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2004 |
| 261 | Null, W. M. & San Patricio Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Aug 1994 |
| 262 | Null, W.M. Operations, Inc. | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2002 |
| 263 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Apr 2025 |
| 264 | Nupower Energy, LLC | Houston, TX 77058 | Oil & Gas Operator | Apr 2025 |
| 265 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 266 | NWG Operating LLC | Canyon, TX 79015 | Oil & Gas Operator | Apr 2025 |
| 267 | Nye Exploration & Prod, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 268 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 269 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 270 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | Apr 2025 |