| 20301 | Northwestern Corporation | Butte, MT 59701 | Oil & Gas Operator | Jun 2026 |
| 20302 | Northwestern Energy, LLC | Butte, MT 59701 | Oil & Gas Operator | Dec 2004 |
| 20303 | Northwestern Inc | East Brady, PA 16028 | Gas Operator | Dec 2012 |
| 20304 | Northwestern Natural Gas | | Gas Operator | Aug 2000 |
| 20305 | Northwestern Production LLC | | Oil & Gas Operator | Apr 2024 |
| 20306 | Northwind Development Company | | Oil Operator | Oct 1995 |
| 20307 | Northwind Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1995 |
| 20308 | Northwind Oil & Gas, LLC | | Oil & Gas Operator | Nov 2019 |
| 20309 | Northwind Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | May 1998 |
| 20310 | Northwood Energy Corp | Columbus, OH 43221 | Oil & Gas Operator | Jun 2026 |
| 20311 | Norton Drilling Co. | Levelland, TX 79336 | Oil & Gas Operator | Nov 2001 |
| 20312 | Norton Frickey | Lakewood, CO 80215 | Oil & Gas Operator | Dec 2023 |
| 20313 | Norton Oil Co. | | Oil & Gas Operator | Jun 1984 |
| 20314 | Norton, J., Company | Lubbock, TX 79414 | Oil & Gas Operator | Jul 2017 |
| 20315 | Norwes Industries, Inc. | | Oil & Gas Operator | Jun 2000 |
| 20316 | Norwood Energy, Inc | | Oil Operator | Dec 2015 |
| 20317 | Norwood Oil | Greeley, CO 80634 | Oil Operator | Mar 1996 |
| 20318 | Norwood Oil Corp | Malakoff, TX 75148 | Oil & Gas Operator | Oct 1995 |
| 20319 | Norwood, A. N., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 20320 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Sep 2026 |
| 20321 | Nossaman E Oil Inc | Del City, OK 73155-5449 | Oil Operator | Oct 2002 |
| 20322 | Nott, Gregory | Wichita, KS 67214 | Oil Operator | Apr 2026 |
| 20323 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2026 |
| 20324 | Nottis, David J. | West Valley, NY 14171 | Gas Operator | Dec 2025 |
| 20325 | Noumenon Corporation | Cape Coral, FL 33914 | Oil & Gas Operator | Dec 2025 |
| 20326 | Nova Energy Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2003 |
| 20327 | Nova Energy Inc | Casper, WY 82601 | Oil & Gas Operator | Oct 2020 |
| 20328 | Nova Natural Res Corp | Denver, CO 80202 | Oil & Gas Operator | Nov 1989 |
| 20329 | Nova Petroleum Cororation | | Oil & Gas Operator | Mar 1987 |
| 20330 | Nova Petroleum Corp | Salt Lake City, UT 84147 | Oil & Gas Operator | Sep 1986 |
| 20331 | Novco Operating Company | Novice, TX 79538 | Oil & Gas Operator | Sep 2026 |
| 20332 | Novo Energy Resources | Houston, TX 77006 | Oil & Gas Operator | Sep 2026 |
| 20333 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 20334 | Novo II Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2026 |
| 20335 | Novo Oil & Gas Northern Delaware, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 20336 | Novus Louisiana LLC | | Oil & Gas Operator | Feb 2006 |
| 20337 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Jul 2026 |
| 20338 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 20339 | Nowata Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 20340 | Nowata Petroleum Operating Co | Nowata, OK 74048-9617 | Oil Operator | Aug 2014 |
| 20341 | Nowea, Inc | Melbourne, FL 32901 | Oil Operator | Dec 2024 |
| 20342 | Noxxe | Ottawa, KS 66067 | Oil & Gas Operator | Dec 2024 |
| 20343 | Noxxe Oil And Gas, LLC | Houston, TX 77269 | Oil & Gas Operator | Sep 2026 |
| 20344 | NP Energy Corporation | Englewood, CO 80111 | Oil & Gas Operator | Jun 1989 |
| 20345 | NP Resources, LLC | | Oil & Gas Operator | Aug 2022 |
| 20346 | NPF Energy Corporation | Boise, ID 83708 | Oil & Gas Operator | Apr 2026 |
| 20347 | NRC Development, LLC | | Gas Operator | Nov 2002 |
| 20348 | NRD - Rein Resources, A General Partnership | Union, KY 41091 | Oil Operator | Apr 2026 |
| 20349 | NRG Assets Management, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2016 |
| 20350 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 20351 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 20352 | NRPC Operating, LLC | Dallas, TX 75206 | Oil Operator | Feb 2012 |
| 20353 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | May 2026 |
| 20354 | NSP Resources, LLC | Houston, TX 77018 | Oil & Gas Operator | Jun 2026 |
| 20355 | NT Minerals, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2026 |
| 20356 | NTR Energy LLC (Osage Cty Only) | | Oil & Gas Operator | Apr 2020 |
| 20357 | NTS Energy LLC | Indiana, PA 15701-1801 | Oil & Gas Operator | Dec 2015 |
| 20358 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Jun 2026 |
| 20359 | Nucomer Energy LLC | Erie, PA 16510 | Oil & Gas Operator | May 2026 |
| 20360 | Nucor Oil & Gas Inc | Riverton, WY 82501 | Oil & Gas Operator | Jun 2026 |
| 20361 | Nucorp Energy, Inc. | | Oil & Gas Operator | Jan 1985 |
| 20362 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 20363 | Nueces Oil Company | George West, TX 78022 | Oil & Gas Operator | Mar 2008 |
| 20364 | Nueces Petroleum Corporation | Sugar Land, TX 77496 | Oil Operator | Sep 2026 |
| 20365 | Nueces Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2002 |
| 20366 | Nuenergy LLC | | Oil & Gas Operator | Jul 2026 |
| 20367 | Nuevida Resources, LLC | Dallas, TX 75235 | Gas Operator | May 2026 |
| 20368 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 20369 | Nuevo Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2004 |
| 20370 | Nuex Operating, Inc. | | Oil Operator | Oct 2004 |
| 20371 | Nugulf Operating, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 20372 | Null, W. M. & San Patricio Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Aug 1994 |
| 20373 | Null, W.M. Operations, Inc. | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2002 |
| 20374 | Numac LLC | Cherryvale, KS 67335 | Oil Operator | Mar 2026 |
| 20375 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Jun 2026 |
| 20376 | Numatex, Inc | | Oil Operator | Dec 2013 |
| 20377 | Numen Corporation | | Oil & Gas Operator | Jan 1982 |
| 20378 | Nupower Energy, LLC | Houston, TX 77058 | Oil & Gas Operator | Sep 2026 |
| 20379 | Nuroc Energy Incorporated | Andrews, TX 79714 | Oil Operator | Jul 2026 |
| 20380 | Nuss Oil Operations | | Oil & Gas Operator | Aug 1998 |
| 20381 | Nuss Sally | | Oil Operator | Mar 1982 |
| 20382 | Nuss, Fred J. | Hoisington, KS 67544 | Gas Operator | Apr 2026 |
| 20383 | Nuss, Kenneth J. | Russell, KS 67665 | Oil Operator | Aug 1997 |
| 20384 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 20385 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 20386 | Nuttco Oil & Gas | Corning, OH 43730 | Oil & Gas Operator | Dec 2010 |
| 20387 | Nuwi-Bayshore LLC | | Oil & Gas Operator | Dec 1999 |
| 20388 | NV O&G Investments LLC /Osage Only | | Oil Operator | Sep 2022 |
| 20389 | NWG Operating LLC | Canyon, TX 79015 | Oil & Gas Operator | Sep 2026 |
| 20390 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | May 2026 |
| 20391 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | May 2026 |
| 20392 | Ny Oil Inc. | | Oil Operator | Jul 2026 |
| 20393 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 20394 | Nye Exploration & Prod, L.L.C. | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 20395 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 20396 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 20397 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 20398 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 20399 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 20400 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | Sep 2026 |