| 21101 | Novco Operating Company | Novice, TX 79538 | Oil & Gas Operator | Apr 2025 |
| 21102 | Novo Energy Resources | Houston, TX 77006 | Oil & Gas Operator | Apr 2025 |
| 21103 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 21104 | Novo Oil & Gas Northern Delaware, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 21105 | Novus Louisiana LLC | | Oil & Gas Operator | Feb 2006 |
| 21106 | Novus Oil & Gas, LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2005 |
| 21107 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Feb 2025 |
| 21108 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 21109 | Nowata Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 21110 | Nowata Petroleum Operating Co | Nowata, OK 74048-9617 | Oil Operator | Aug 2014 |
| 21111 | Noxxe | Ottawa, KS 66067 | Oil & Gas Operator | Dec 2023 |
| 21112 | Noxxe Oil And Gas, LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 21113 | NP Energy Corporation | Englewood, CO 80111 | Oil & Gas Operator | Jun 1989 |
| 21114 | NP Resources, LLC | | Oil & Gas Operator | Aug 2022 |
| 21115 | NPF Energy Corporation | Boise, ID 83708 | Oil & Gas Operator | Dec 2024 |
| 21116 | NRC Development, LLC | | Gas Operator | Nov 2002 |
| 21117 | NRD - Rein Resources, A General Partnership | Union, KY 41091 | Oil Operator | Dec 2024 |
| 21118 | NRG Assets Management, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2016 |
| 21119 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 21120 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 21121 | NRPC Operating, LLC | Dallas, TX 75206 | Oil Operator | Feb 2012 |
| 21122 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | Jan 2025 |
| 21123 | NT Minerals, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 21124 | NTR Energy LLC | Caney, KS 67333 | Oil & Gas Operator | Apr 2020 |
| 21125 | NTS Energy LLC | Indiana, PA 15701-1801 | Oil & Gas Operator | Dec 2015 |
| 21126 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 21127 | Nucomer Energy LLC | Erie, PA 16507 | Oil & Gas Operator | Feb 2025 |
| 21128 | Nucor Oil & Gas Inc | Riverton, WY 82501 | Oil & Gas Operator | Feb 2025 |
| 21129 | Nucorp Energy, Inc. | | Oil & Gas Operator | Jan 1985 |
| 21130 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 21131 | Nueces Oil Company | George West, TX 78022 | Oil & Gas Operator | Mar 2008 |
| 21132 | Nueces Petroleum Corporation | Sugar Land, TX 77496 | Oil Operator | Apr 2025 |
| 21133 | Nueces Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2002 |
| 21134 | Nuenergy LLC | | Oil & Gas Operator | Jan 2025 |
| 21135 | Nuevida Resources LLC | Dallas, TX 75235 | Gas Operator | Feb 2025 |
| 21136 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 21137 | Nuevo Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2004 |
| 21138 | Nuex Operating, Inc. | | Oil Operator | Oct 2004 |
| 21139 | Nugulf Operating, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 21140 | Null, W. M. & San Patricio Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Aug 1994 |
| 21141 | Null, W.M. Operations, Inc. | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2002 |
| 21142 | Numac LLC | Cherryvale, KS 67335 | Oil Operator | Dec 2024 |
| 21143 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Apr 2025 |
| 21144 | Numatex, Inc | | Oil Operator | Dec 2013 |
| 21145 | Numen Corporation | | Oil & Gas Operator | Jan 1982 |
| 21146 | Nupower Energy, LLC | Houston, TX 77058 | Oil & Gas Operator | Apr 2025 |
| 21147 | Nuroc Energy Incorporated | Andrews, TX 79714 | Oil Operator | Feb 2025 |
| 21148 | Nuss Oil Operations | | Oil & Gas Operator | Aug 1998 |
| 21149 | Nuss Sally | | Oil Operator | Mar 1982 |
| 21150 | Nuss, Fred J. | Hoisington, KS 67544 | Gas Operator | Dec 2024 |
| 21151 | Nuss, Kenneth J. | Russell, KS 67665 | Oil Operator | Aug 1997 |
| 21152 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 21153 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 21154 | Nuttco Oil & Gas | Corning, OH 43730 | Oil & Gas Operator | Dec 2010 |
| 21155 | Nuwi-Bayshore LLC | | Oil & Gas Operator | Dec 1999 |
| 21156 | NWG Operating LLC | Canyon, TX 79015 | Oil & Gas Operator | Apr 2025 |
| 21157 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Jan 2025 |
| 21158 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Feb 2025 |
| 21159 | Ny Oil Inc. | | Oil Operator | Dec 2024 |
| 21160 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 21161 | Nye Exploration & Prod, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 21162 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 21163 | Nylund* J. W. | | Oil Operator | Jul 2000 |
| 21164 | Nys Natural Gas Co | Englewood, CO 80111-4737 | Gas Operator | Dec 1984 |
| 21165 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 21166 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 21167 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 21168 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 21169 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | Apr 2025 |
| 21170 | O & G Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 1996 |
| 21171 | O & O Operators, LLC. | Fate, TX 75132 | Oil & Gas Operator | Apr 2025 |
| 21172 | O G & E | Oklahoma City, OK 73124 | Oil & Gas Operator | Feb 2014 |
| 21173 | O H Berry | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 21174 | O Hill Enterprises, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Jan 2014 |
| 21175 | O I L Energy Corp | | Oil & Gas Operator | Oct 2017 |
| 21176 | O I L Niagaran LLC | | Oil & Gas Operator | May 2017 |
| 21177 | O K Swabbing Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 21178 | O S & J Operatin | | Oil Operator | Nov 1984 |
| 21179 | O S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jan 2018 |
| 21180 | O&Apos;Brien Energy Resources Corp | | Oil & Gas Operator | Dec 2023 |
| 21181 | O&G Investments Inc. | Runge, TX 78151 | Oil & Gas Operator | Feb 2003 |
| 21182 | O'Bar Operating Co., Inc. | Longview, TX 75604 | Oil & Gas Operator | Apr 2025 |
| 21183 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Apr 2025 |
| 21184 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 21185 | O'Boyle Energy Corporation | | Oil Operator | Feb 1991 |
| 21186 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 21187 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Apr 2025 |
| 21188 | O'Brien Oil Corporation | Guthrie, OK 73044-3154 | Oil & Gas Operator | Jan 2025 |
| 21189 | O'Brien Oil LLC | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2020 |
| 21190 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 21191 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 21192 | O'Brien, George H. Jr. | Midland, TX 79701 | Oil & Gas Operator | Jun 1994 |
| 21193 | O'Brien, Mae Or Brett Strickland | Belington, WV 26250-0076 | Oil & Gas Operator | Dec 2021 |
| 21194 | O'Brien-Sill | | Oil & Gas Operator | Dec 2024 |
| 21195 | O'Connell, James P. | Vacaville, CA 95687 | Oil Operator | Nov 2009 |
| 21196 | O'Connor & Hewitt, LTD. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1998 |
| 21197 | O'Connor Energy Management, LLC | Victoria, TX 77902 | Oil Operator | Apr 2025 |
| 21198 | O'Connor, Emma | Hamburg, NY 14075 | Gas Operator | Dec 2023 |
| 21199 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2025 |
| 21200 | O'Donnell Bill C | Tulsa, OK 74135-4241 | Oil & Gas Operator | Oct 2014 |