| 1 | N And B Exploration, Inc. | | Oil & Gas Operator | Jun 1993 |
| 2 | N Central Casing Pullers, Inc. | | Oil & Gas Operator | May 1994 |
| 3 | N. B. Hunt | | Oil & Gas Operator | May 1981 |
| 4 | N. E. Loomis | | Oil Operator | Oct 1986 |
| 5 | N. J. Pardue | | Oil & Gas Operator | Jul 1994 |
| 6 | N. R. Price | | Oil & Gas Operator | Nov 1983 |
| 7 | N. T. Rutledge Oil Co. | | Oil Operator | Jan 1989 |
| 8 | N. W. Corporation | | Gas Operator | Jan 1989 |
| 9 | Nabors Drilling Company, Inc. | | Oil & Gas Operator | Sep 1977 |
| 10 | Nabors Well Services LTD | Houston, TX 77067-4536 | Oil Operator | Apr 2011 |
| 11 | Nabors-Johnson Prod Co., Inc. | | Oil & Gas Operator | Dec 2020 |
| 12 | Nacatosh Gas Incorporated | | Oil & Gas Operator | Aug 2013 |
| 13 | Nadel & Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 14 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 15 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 16 | Nadel And Gussman Ruston, LLC | | Oil & Gas Operator | Dec 2024 |
| 17 | Nasser Oil & Gas, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 18 | Nat. Gas Pipeline Co Of Amer. | | Oil Operator | Dec 2008 |
| 19 | Nathan C. Hale | | Oil & Gas Operator | Jan 2025 |
| 20 | Nathan Hale Oil Co. | | Oil & Gas Operator | Jan 2025 |
| 21 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 22 | National Exploration Company | | Oil & Gas Operator | Mar 1982 |
| 23 | National Offshore LP | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 24 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 25 | Natomas-McCormick-Coastal | | Oil & Gas Operator | Feb 1984 |
| 26 | Natural Gas Systems, Inc. | | Oil & Gas Operator | Dec 2002 |
| 27 | Natural Resource MGMT. Corp. | | Oil & Gas Operator | Jun 1989 |
| 28 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 29 | Navitas Resources, LLC | | Oil & Gas Operator | May 2016 |
| 30 | Naylor-Pritchard | | Oil Operator | Jul 1987 |
| 31 | NCM Operations, Inc. | | Oil Operator | Oct 2000 |
| 32 | NCX Company, Inc. | | Oil & Gas Operator | Aug 1999 |
| 33 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Dec 2025 |
| 34 | Nebo Operating Company | | Oil & Gas Operator | Apr 1991 |
| 35 | Needham Resources, Inc. | | Oil & Gas Operator | Jan 1998 |
| 36 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Aug 2025 |
| 37 | Neilco | | Oil & Gas Operator | Nov 2024 |
| 38 | Nelson Energy, Inc. | | Oil & Gas Operator | Nov 2024 |
| 39 | Nelson Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1995 |
| 40 | Nelson Oil Corporation | | Oil Operator | Jul 1983 |
| 41 | Nemours Corporation | | Gas Operator | Jan 1986 |
| 42 | Neosho Operating La, LLC | | Oil Operator | Oct 2016 |
| 43 | Nerco Oil & Gas Inc | | Oil & Gas Operator | Dec 1996 |
| 44 | Nestor Petroleum Company | | Oil & Gas Operator | Jun 1986 |
| 45 | Netco Energy 1 LLC | | Oil Operator | Jan 2025 |
| 46 | Neuhoff Oil & Gas Corp. | | Oil & Gas Operator | Dec 1986 |
| 47 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Dec 2025 |
| 48 | Nevanen Energy, Inc. | | Oil & Gas Operator | Dec 2022 |
| 49 | New & Brasher Operating | | Oil Operator | Oct 1984 |
| 50 | New & Hughes Drilling Co. Inc. | | Oil Operator | Jun 1983 |
| 51 | New Century Exploration, Inc. | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 52 | New Ora Oil, Inc. | | Oil Operator | Aug 1984 |
| 53 | New Orleans Public Service Inc | | Oil Operator | Dec 1994 |
| 54 | New York Petroleum Corp. | | Oil & Gas Operator | Nov 1982 |
| 55 | New-Park, Inc. | | Oil Operator | Sep 1990 |
| 56 | Newco Inc | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 57 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 58 | Newhaven Operating Inc | | Oil & Gas Operator | Dec 1998 |
| 59 | Newmont Oil Co. & Colorado | | Oil & Gas Operator | Mar 1978 |
| 60 | Newmont Oil Company | | Oil & Gas Operator | Sep 1988 |
| 61 | Newport Operators, LLC | | Oil & Gas Operator | Jan 2019 |
| 62 | Nexen Petroleum U.S.A. Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2012 |
| 63 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 64 | NGC Energy Company | | Oil & Gas Operator | May 1989 |
| 65 | NGL Processing, LLC | | Oil Operator | Jun 2000 |
| 66 | Nicco Operating Co. | | Oil & Gas Operator | May 1990 |
| 67 | Nichols Oil & Gas Corporation | Shreveport, LA 71135 | Oil & Gas Operator | Aug 2003 |
| 68 | Nicklos Oil & Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1986 |
| 69 | Nicor Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 70 | Nip-N-Tuck Minerals, Inc. | | Gas Operator | Feb 1988 |
| 71 | Nippon Oil Exploration USA LTD | | Oil & Gas Operator | Dec 2010 |
| 72 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 73 | Noe And Woods, Et Al | | Gas Operator | Jan 2008 |
| 74 | Noex, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Apr 1998 |
| 75 | Nomeco Oil & Gas Co. | Jackson, MI 49204 | Oil & Gas Operator | Dec 1994 |
| 76 | Noram Field Services Corp. | | Oil Operator | Apr 1999 |
| 77 | Norbay Oil Corp. | | Oil & Gas Operator | Dec 1999 |
| 78 | Norcen Explorer, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 1998 |
| 79 | Norco Development, Inc. | | Oil Operator | Jul 1994 |
| 80 | Norexco Inc. | | Oil & Gas Operator | Aug 1988 |
| 81 | Nortex Oil & Gas, Inc. | | Oil Operator | Feb 1994 |
| 82 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 83 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 84 | North Central Oil Corp., Et Al | | Oil & Gas Operator | Mar 1977 |
| 85 | Northcoast Oil Company | | Oil & Gas Operator | Mar 2009 |
| 86 | Northcott Exploration Co. Inc. | | Oil & Gas Operator | Dec 1987 |
| 87 | Northeast Resources | | Oil & Gas Operator | Jan 1992 |
| 88 | Northern Energy Management | | Oil & Gas Operator | Nov 2019 |
| 89 | Northern Michigan Expl Co | | Oil & Gas Operator | Jul 1990 |
| 90 | Northla Productions, LLC | | Oil & Gas Operator | Dec 2024 |
| 91 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 92 | Northridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 93 | Northstar Offshore Group, LLC | | Oil & Gas Operator | Apr 2020 |
| 94 | Northwest Louisiana Production LLC | | Oil & Gas Operator | Dec 2024 |
| 95 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 96 | Northwind Oil & Gas, LLC | | Oil & Gas Operator | Nov 2019 |
| 97 | Novus Louisiana LLC | | Oil & Gas Operator | Feb 2006 |
| 98 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Oct 2025 |
| 99 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 100 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |