| 7701 | Northridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 7702 | Northstar Gulfsands, LLC | Houston, TX 77046 | Oil & Gas Operator | Mar 2006 |
| 7703 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 7704 | Northwest Airport Management, LP | Spring, TX 77379 | Gas Operator | Oct 2025 |
| 7705 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 7706 | Northwind Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1995 |
| 7707 | Norton Drilling Co. | Levelland, TX 79336 | Oil & Gas Operator | Nov 2001 |
| 7708 | Norvel Douglas Oil Inc. | H SPG NTL PK, AR 71909 | Oil Operator | Oct 2025 |
| 7709 | Norwood, A. N., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 7710 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | Oct 2025 |
| 7711 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 7712 | Novco Operating Company | Novice, TX 79538 | Oil & Gas Operator | Oct 2025 |
| 7713 | Novo Energy Resources | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 7714 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 7715 | Novus Oil & Gas, LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2005 |
| 7716 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 7717 | Noxxe Oil And Gas, LLC | Houston, TX 77269 | Oil & Gas Operator | Oct 2025 |
| 7718 | NRG Assets Management, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2016 |
| 7719 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 7720 | NRPC Operating, LLC | Dallas, TX 75206 | Oil Operator | Feb 2012 |
| 7721 | NT Minerals, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Oct 2025 |
| 7722 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 7723 | Nueces Oil Company | George West, TX 78022 | Oil & Gas Operator | Mar 2008 |
| 7724 | Nueces Petroleum Corporation | Sugar Land, TX 77496 | Oil Operator | Oct 2025 |
| 7725 | Nueces Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2002 |
| 7726 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 7727 | Nuevo Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2004 |
| 7728 | Null, W. M. & San Patricio Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Aug 1994 |
| 7729 | Null, W.M. Operations, Inc. | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2002 |
| 7730 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Oct 2025 |
| 7731 | Nupower Energy, LLC | Houston, TX 77058 | Oil & Gas Operator | Oct 2025 |
| 7732 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 7733 | NWG Operating LLC | Canyon, TX 79015 | Oil & Gas Operator | Oct 2025 |
| 7734 | Nye Exploration & Prod, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 7735 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 7736 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 7737 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | Oct 2025 |
| 7738 | O & G Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 1996 |
| 7739 | O & O Operators, LLC. | Fate, TX 75132 | Oil & Gas Operator | Oct 2025 |
| 7740 | O Hill Enterprises, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Jan 2014 |
| 7741 | O S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jan 2018 |
| 7742 | O&G Investments Inc. | Runge, TX 78151 | Oil & Gas Operator | Feb 2003 |
| 7743 | O'Bar Operating Co., Inc. | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 7744 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Oct 2025 |
| 7745 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 7746 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 7747 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Oct 2025 |
| 7748 | O'Brien Operating Company | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2004 |
| 7749 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 7750 | O'Brien, George H. Jr. | Midland, TX 79701 | Oil & Gas Operator | Jun 1994 |
| 7751 | O'Connor & Hewitt, LTD. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1998 |
| 7752 | O'Connor Energy Management, LLC | Victoria, TX 77902 | Oil Operator | Oct 2025 |
| 7753 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | Oct 2025 |
| 7754 | O'Donohoe, Jack | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2002 |
| 7755 | O'Leary'S Oil & Gas Inc. | Arcadia, FL 34266 | Oil & Gas Operator | May 2008 |
| 7756 | O'Neal Cattle Co. | Pampa, TX 79066 | Gas Operator | Oct 2025 |
| 7757 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | Jul 2025 |
| 7758 | O'Neal Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 7759 | O'Neal Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1999 |
| 7760 | O'Neal, Lindell | Nocona, TX 76255 | Oil & Gas Operator | Jun 2025 |
| 7761 | O'Neil, Pat | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2005 |
| 7762 | O'Neill Properties, LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 7763 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | Oct 2025 |
| 7764 | O'Sand Production, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Aug 2003 |
| 7765 | O'Sullivan Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2000 |
| 7766 | O'Tool Oil & Gas, LLC | Dallas, TX 75219 | Oil & Gas Operator | Oct 2025 |
| 7767 | O. H. B. Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Sep 2019 |
| 7768 | O. H. M. Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2025 |
| 7769 | O.G.O. Refining | Luling, TX 78648 | Oil & Gas Operator | Jun 2013 |
| 7770 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 7771 | O.T. Oil | Kilgore, TX 75663 | Oil Operator | Oct 2025 |
| 7772 | Oahe Oil Company | Texline, TX 79087 | Oil & Gas Operator | May 2004 |
| 7773 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 7774 | Oak Hills Drilling & Oper., LLC | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 7775 | Oak Prairie Operations, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Oct 2025 |
| 7776 | Oak Resources Inc | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2013 |
| 7777 | Oak Valley Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
| 7778 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 7779 | Oakmont Oil And Gas | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 7780 | Oakridge Energy, Inc. | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 7781 | Oakridge Oil And Gas, LP | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 7782 | Oaktree Oil Company | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 7783 | Oakwood Energy, Inc. | Jourdanton, TX 78026 | Oil & Gas Operator | Mar 2023 |
| 7784 | Oasis Operating, Inc. | Lubbock, TX 79404 | Oil & Gas Operator | Nov 2020 |
| 7785 | Oasis Petroleum Permian LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 7786 | Oates, John Co., Inc. | Stinnett, TX 79083 | Oil & Gas Operator | Oct 2025 |
| 7787 | Obax Oil And Gas LLC | Saint Louis, MO 63131 | Oil Operator | Oct 2025 |
| 7788 | Oblaen Resources LLC | Wallis, TX 77485 | Oil & Gas Operator | Oct 2025 |
| 7789 | Occam Petroleum E&P, LLC | Meeker, OK 74855 | Oil Operator | Oct 2025 |
| 7790 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 7791 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 7792 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 7793 | Occidental W TX Overthrust, Inc. | Houston, TX 77210 | Oil & Gas Operator | Dec 2021 |
| 7794 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 7795 | Ocotillo Energy Resources, LLC | Odessa, TX 79765 | Oil Operator | Oct 2025 |
| 7796 | Octane Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 7797 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 7798 | Oden, Robin H., Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1994 |
| 7799 | Odessa Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 7800 | Odessa Oil Investment Co., Inc. | Odessa, TX 79762 | Oil & Gas Operator | Nov 2016 |