| 3101 | Nabors Drilling Company, Inc. | | Oil & Gas Operator | Aug 1977 |
| 3102 | Nabors Well Services LTD | | Oil Operator | Apr 2011 |
| 3103 | Nabors-Johnson Prod Co., Inc. | | Oil & Gas Operator | Dec 2020 |
| 3104 | Nacatosh Gas Incorporated | | Oil & Gas Operator | Aug 2013 |
| 3105 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 3106 | Nadel And Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 3107 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Nov 2023 |
| 3108 | Nadel And Gussman, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | May 2024 |
| 3109 | Nasser Oil & Gas, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 3110 | Nat. Gas Pipeline Co Of Amer. | | Oil Operator | Dec 2008 |
| 3111 | Nathan C. Hale | | Oil & Gas Operator | Jan 2024 |
| 3112 | Nathan Hale Oil Co. | | Oil & Gas Operator | Jan 2024 |
| 3113 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 3114 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 3115 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 3116 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 3117 | Natomas-McCormick-Coastal | | Oil & Gas Operator | Feb 1984 |
| 3118 | Natural Gas Systems, Inc. | | Oil & Gas Operator | Dec 2002 |
| 3119 | Natural Resource MGMT. Corp. | | Oil & Gas Operator | Jun 1989 |
| 3120 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 3121 | Navitas Resources, LLC | | Oil & Gas Operator | May 2016 |
| 3122 | Naylor-Pritchard | | Oil Operator | Jul 1987 |
| 3123 | NCM Operations, Inc. | | Oil Operator | Oct 2000 |
| 3124 | NCX Company, Inc. | | Oil & Gas Operator | Aug 1999 |
| 3125 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | May 2024 |
| 3126 | Nebo Operating Company | | Oil & Gas Operator | Apr 1991 |
| 3127 | Needham Resources, Inc. | | Oil & Gas Operator | Jan 1998 |
| 3128 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2017 |
| 3129 | Neilco | | Oil & Gas Operator | Nov 2023 |
| 3130 | Nelson Energy, Inc. | | Oil & Gas Operator | Nov 2023 |
| 3131 | Nelson Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1995 |
| 3132 | Nelson Oil Corporation | | Oil Operator | Jul 1983 |
| 3133 | Nemours Corporation | | Gas Operator | Jan 1986 |
| 3134 | Neosho Operating La, LLC | | Oil Operator | Oct 2016 |
| 3135 | Nerco Oil & Gas, Inc. | | Oil & Gas Operator | Dec 1996 |
| 3136 | Nestor Petroleum Company | | Oil & Gas Operator | Jun 1986 |
| 3137 | Neuhoff Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 3138 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | May 2024 |
| 3139 | Nevanen Energy, Inc. | | Oil & Gas Operator | Feb 2024 |
| 3140 | New & Brasher Operating | | Oil Operator | Oct 1984 |
| 3141 | New & Hughes Drilling Co. Inc. | | Oil Operator | Jun 1983 |
| 3142 | New Century Exploration, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2024 |
| 3143 | New Ora Oil, Inc. | | Oil Operator | Aug 1984 |
| 3144 | New Orleans Public Service Inc | | Oil Operator | Dec 1994 |
| 3145 | New York Petroleum Corp. | | Oil & Gas Operator | Nov 1982 |
| 3146 | New-Park, Inc. | | Oil Operator | Sep 1990 |
| 3147 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 3148 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 3149 | Newhaven Operating Inc | | Oil & Gas Operator | Dec 1998 |
| 3150 | Newmont Oil Company | | Oil & Gas Operator | Sep 1988 |
| 3151 | Newport Operators, LLC | | Oil & Gas Operator | Jan 2019 |
| 3152 | Nexen Petroleum U.S.A. Inc. | | Oil & Gas Operator | Jul 2012 |
| 3153 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 3154 | NGC Energy Co. | | Oil & Gas Operator | May 1989 |
| 3155 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 3156 | Nicco Operating Co. | | Oil & Gas Operator | May 1990 |
| 3157 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 3158 | Nicklos Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Nov 1986 |
| 3159 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 3160 | Nip-N-Tuck Minerals, Inc. | | Gas Operator | Feb 1988 |
| 3161 | Nippon Oil Exploration USA LTD | | Oil & Gas Operator | Dec 2010 |
| 3162 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 3163 | Noe And Woods, Et Al | | Gas Operator | Jan 2008 |
| 3164 | Noex, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Apr 1998 |
| 3165 | Nomeco Oil & Gas Co. | Jackson, MI 49204 | Oil & Gas Operator | Dec 1994 |
| 3166 | Noram Field Services Corp. | | Oil Operator | Apr 1999 |
| 3167 | Norcen Explorer, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 1998 |
| 3168 | Norco Development, Inc. | | Oil Operator | Jul 1994 |
| 3169 | Norexco Inc. | | Oil & Gas Operator | Aug 1988 |
| 3170 | Nortex Oil & Gas, Inc. | | Oil Operator | Feb 1994 |
| 3171 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 3172 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 3173 | North Central Oil Corp., Et Al | | Oil & Gas Operator | Mar 1977 |
| 3174 | Northcoast Oil Company | | Oil & Gas Operator | Mar 2009 |
| 3175 | Northcott Exploration Co. Inc. | | Oil & Gas Operator | Dec 1987 |
| 3176 | Northeast Resources | | Oil & Gas Operator | Jan 1992 |
| 3177 | Northern Energy Management | | Oil & Gas Operator | Nov 2019 |
| 3178 | Northern Michigan Expl Co | | Oil & Gas Operator | Jul 1990 |
| 3179 | Northla Productions, LLC | | Oil & Gas Operator | Jan 2024 |
| 3180 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 3181 | Northridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | May 2024 |
| 3182 | Northstar Offshore Group, LLC | | Oil & Gas Operator | Apr 2020 |
| 3183 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 3184 | Northwind Oil & Gas, LLC | | Oil & Gas Operator | Nov 2019 |
| 3185 | Novus Louisiana LLC | | Oil & Gas Operator | Mar 2006 |
| 3186 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Feb 2024 |
| 3187 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 3188 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 3189 | Nucorp Energy, Inc. | | Oil & Gas Operator | Jan 1985 |
| 3190 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 3191 | Nuex Operating, Inc. | | Oil Operator | Oct 2004 |
| 3192 | Nugulf Operating, L.L.C. | | Oil & Gas Operator | Nov 2023 |
| 3193 | Numen Corporation | | Oil & Gas Operator | Jan 1982 |
| 3194 | O'Boyle Energy Corporation | | Oil Operator | Feb 1991 |
| 3195 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 3196 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 3197 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Apr 1988 |
| 3198 | O'Meara LLC | | Oil & Gas Operator | Oct 2022 |
| 3199 | O'Meara, Inc. | | Oil & Gas Operator | Dec 2006 |
| 3200 | O'Sullivan & Scully, Inc. | | Oil & Gas Operator | Oct 1994 |