| 20101 | Nacogdoches Oil & Gas Inc | Nacogdoches, TX 75963 | Oil & Gas Operator | Oct 2025 |
| 20102 | Nacogdoches Oil & Gas, LLC | Nacogdoches, TX 75961 | Oil & Gas Operator | Dec 2017 |
| 20103 | Nadcf Recovery Group, Inc. | Chapin, SC 29036 | Oil & Gas Operator | Oct 2025 |
| 20104 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 20105 | Nadel And Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 20106 | Nadel And Gussman Heyco, LLC | Roswell, NM 88202 | Oil & Gas Operator | Dec 2014 |
| 20107 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 20108 | Nadel And Gussman Rockies, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2012 |
| 20109 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Dec 2024 |
| 20110 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 20111 | Nadk, LLC | Orem, UT 84097 | Oil & Gas Operator | Aug 2025 |
| 20112 | Nadsoilco LLC | Chicago, IL 60606 | Oil & Gas Operator | Oct 2025 |
| 20113 | Nae, Inc. | Kerrville, TX 78028 | Oil Operator | Apr 2025 |
| 20114 | Naftex Operating Company | | Oil & Gas Operator | Aug 2025 |
| 20115 | Nagel, Arthur F. & Elaine L. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 20116 | Nagy Joseph | | Oil Operator | Dec 2014 |
| 20117 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 20118 | Naifco Oil & Gas LLC | Oklahoma City, OK 73107 | Oil & Gas Operator | Jun 2025 |
| 20119 | Nail Stephen Dba Nail Oil & Gas | Maud, OK 74854 | Oil Operator | Dec 2024 |
| 20120 | Nails Operating Company LLC | Hondo, TX 78861 | Oil Operator | Oct 2025 |
| 20121 | Nairn, Robert | Elkhart, KS 67950 | Gas Operator | Apr 2011 |
| 20122 | Nall Oil & Gas | Mineral Wells, TX 76067 | Oil & Gas Operator | Oct 2025 |
| 20123 | Nally, Joseph L | Uniontown, KY 42461 | Oil & Gas Operator | Dec 2021 |
| 20124 | Nami Resources Company, LLC | | Oil & Gas Operator | Dec 2023 |
| 20125 | Nana Oil & Gas Inc. | | Oil & Gas Operator | Jan 2018 |
| 20126 | Nance Engineering Inc. | Houston, TX 77058 | Oil & Gas Operator | Mar 2002 |
| 20127 | Nance Petroleum Corporation | Billings, MT 59103-7168 | Oil & Gas Operator | Nov 2007 |
| 20128 | Nanco Resources, LLC | | Gas Operator | Dec 2021 |
| 20129 | Nancy Oil & Gas Corp | Tulsa, OK 74101 | Oil Operator | Apr 2020 |
| 20130 | Nancy Wilcox E Qualls | Farmington, NM 87410 | Gas Operator | May 2017 |
| 20131 | Nanke Energy LLC | Westminster, CO 80234 | Oil & Gas Operator | Jul 2025 |
| 20132 | Narbo Farms, LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 20133 | Nard Inc | Buffalo, OK 73834-9737 | Oil Operator | Dec 2005 |
| 20134 | Naro Oil Corporation | Dallas, TX 75230-1986 | Oil & Gas Operator | Nov 2003 |
| 20135 | Nasco Petroleum L.L.C. | | Oil & Gas Operator | Jul 2025 |
| 20136 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 20137 | Nashville Associates Inc | | Oil & Gas Operator | Dec 2003 |
| 20138 | Nassau Resources Inc | Denver, CO 80222 | Oil & Gas Operator | Mar 2000 |
| 20139 | Nasser Oil & Gas, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 20140 | Nat. Gas Pipeline Co Of Amer. | | Oil Operator | Dec 2008 |
| 20141 | Nataraja Oil Corporation | Foley, AL 36535 | Oil Operator | Aug 2010 |
| 20142 | Natchez Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 20143 | Natchez Pipe & Equip. Co., Inc | | Oil Operator | Nov 1981 |
| 20144 | Nathan C. Hale | | Oil & Gas Operator | Jan 2025 |
| 20145 | Nathan Hale Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 20146 | Nathan Petroleum Corp., Yahn & Yahn Inc | Rexville, NY 14877 | Oil & Gas Operator | Dec 2024 |
| 20147 | Nathan Petroleum Corporation | Rexville, NY 14877 | Oil & Gas Operator | Dec 2024 |
| 20148 | National Coopera | | Oil & Gas Operator | Mar 1992 |
| 20149 | National Cooperative Refinery Assoc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 20150 | National Cooperative RFG Assoc | McPherson, KS 67460-1404 | Oil & Gas Operator | Jun 2006 |
| 20151 | National Develop | | Oil & Gas Operator | Jan 1990 |
| 20152 | National Energy Exp Inc | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 20153 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 20154 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 20155 | National Fuel Corporation | Greenwood VIllage, CO 80111 | Oil & Gas Operator | Aug 2025 |
| 20156 | National Fuel Gas Supply Corporation | | Gas Operator | Dec 2010 |
| 20157 | National Investors Group | Warren, OH 44481 | Oil & Gas Operator | Nov 1996 |
| 20158 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 20159 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 20160 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 20161 | National Oil Company (Ohio) The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 20162 | National Onshore LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 20163 | National Petrole | | Oil & Gas Operator | Dec 1996 |
| 20164 | National Petroleum Reserves, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Apr 2012 |
| 20165 | National Pride Operating | Parker, CO 80134 | Oil & Gas Operator | Dec 2017 |
| 20166 | National Surface & Minerals, LLC | Addison, TX 75001 | Gas Operator | Jan 2023 |
| 20167 | National Treasure Mines | San Marina, CA 91118 | Oil Operator | Dec 1998 |
| 20168 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Jun 2025 |
| 20169 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 20170 | Natl Fuel Gas Supply Corp | Williamsville, NY 14221-5887 | Oil & Gas Operator | Dec 2009 |
| 20171 | Natland Energy Corp | New Philadelphi, OH 44663 | Oil & Gas Operator | Dec 1996 |
| 20172 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 20173 | Natomas-McCormick-Coastal | | Oil & Gas Operator | Feb 1984 |
| 20174 | Natrona County Holdings LLC | Austin, TX 78701 | Oil & Gas Operator | Nov 2020 |
| 20175 | Natural Capital LLC | Castle Rock, CO 80104 | Oil & Gas Operator | Dec 2009 |
| 20176 | Natural Energy Dev Corp | Pittsburgh, PA 15241-1548 | Oil & Gas Operator | Dec 2018 |
| 20177 | Natural Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 1997 |
| 20178 | Natural Gas & Oi | | Gas Operator | Dec 1987 |
| 20179 | Natural Gas & Oil, Inc. | Fayette, AL 35555 | Oil & Gas Operator | Jul 2025 |
| 20180 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 20181 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 20182 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 20183 | Natural Gas Corp Of Ca | Vernal, UT 84078 | Oil & Gas Operator | Jun 1989 |
| 20184 | Natural Gas Corp Of California | Vernal, UT 84078 | Oil & Gas Operator | Dec 1989 |
| 20185 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 20186 | Natural Gas Expl | | Oil & Gas Operator | Jul 1990 |
| 20187 | Natural Gas MKTG. & Storage Co. | Houston, TX 77251 | Oil & Gas Operator | Sep 1996 |
| 20188 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 20189 | Natural Gas Pipeline Co Of Amer. | Houston, TX 77002 | Gas Operator | Jul 2008 |
| 20190 | Natural Gas Processing Company | Worland, WY 82401 | Oil & Gas Operator | Aug 2025 |
| 20191 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 20192 | Natural Gas Systems, Inc. | | Oil & Gas Operator | Dec 2002 |
| 20193 | Natural Oil & Gas Corp | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 20194 | Natural Petroleum Company | Overton, TX 75684 | Oil & Gas Operator | Jun 1994 |
| 20195 | Natural Progression Oil & Gas Corp | Stillwater, OK 74075 | Oil & Gas Operator | Jul 2025 |
| 20196 | Natural Reserves Group, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1993 |
| 20197 | Natural Resource Corporation | Rock Springs, WY 82901 | Oil & Gas Operator | Sep 1983 |
| 20198 | Natural Resource Group Inc | | Oil & Gas Operator | Jan 2024 |
| 20199 | Natural Resource MGMT. Corp. | | Oil & Gas Operator | Jun 1989 |
| 20200 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |