| 20701 | NRG Assets Management, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2016 |
| 20702 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 20703 | NRG Resources, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 1987 |
| 20704 | NRPC Operating, LLC | Dallas, TX 75206 | Oil Operator | Feb 2012 |
| 20705 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | Apr 2025 |
| 20706 | NT Minerals, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Jul 2025 |
| 20707 | NTR Energy LLC (Osage Cty Only) | | Oil & Gas Operator | Apr 2020 |
| 20708 | NTS Energy LLC | Indiana, PA 15701-1801 | Oil & Gas Operator | Dec 2015 |
| 20709 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | May 2025 |
| 20710 | Nucomer Energy LLC | Erie, PA 16507 | Oil & Gas Operator | May 2025 |
| 20711 | Nucor Oil & Gas Inc | Riverton, WY 82501 | Oil & Gas Operator | May 2025 |
| 20712 | Nucorp Energy, Inc. | | Oil & Gas Operator | Jan 1985 |
| 20713 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 20714 | Nueces Oil Company | George West, TX 78022 | Oil & Gas Operator | Mar 2008 |
| 20715 | Nueces Petroleum Corporation | Sugar Land, TX 77496 | Oil Operator | Jul 2025 |
| 20716 | Nueces Reserves, Inc. | Houston, TX 77019 | Oil & Gas Operator | Oct 2002 |
| 20717 | Nuenergy LLC | | Oil & Gas Operator | Apr 2025 |
| 20718 | Nuevida Resources LLC | Dallas, TX 75235 | Gas Operator | May 2025 |
| 20719 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 20720 | Nuevo Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2004 |
| 20721 | Nuex Operating, Inc. | | Oil Operator | Oct 2004 |
| 20722 | Nugulf Operating, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 20723 | Null, W. M. & San Patricio Corp. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Aug 1994 |
| 20724 | Null, W.M. Operations, Inc. | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2002 |
| 20725 | Numac LLC | Cherryvale, KS 67335 | Oil Operator | Dec 2024 |
| 20726 | Numar Oil And Gas Corporation | Sante Fe, NM 87502 | Oil & Gas Operator | Jul 2025 |
| 20727 | Numatex, Inc | | Oil Operator | Dec 2013 |
| 20728 | Numen Corporation | | Oil & Gas Operator | Jan 1982 |
| 20729 | Nupower Energy, LLC | Houston, TX 77058 | Oil & Gas Operator | Jul 2025 |
| 20730 | Nuroc Energy Incorporated | Andrews, TX 79714 | Oil Operator | May 2025 |
| 20731 | Nuss Oil Operations | | Oil & Gas Operator | Aug 1998 |
| 20732 | Nuss Sally | | Oil Operator | Mar 1982 |
| 20733 | Nuss, Fred J. | Hoisington, KS 67544 | Gas Operator | Mar 2025 |
| 20734 | Nuss, Kenneth J. | Russell, KS 67665 | Oil Operator | Aug 1997 |
| 20735 | Nutek Oil Inc | San Antonio, TX 78254 | Oil & Gas Operator | Feb 2006 |
| 20736 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 20737 | Nuttco Oil & Gas | Corning, OH 43730 | Oil & Gas Operator | Dec 2010 |
| 20738 | Nuwi-Bayshore LLC | | Oil & Gas Operator | Dec 1999 |
| 20739 | NV O&G Investments LLC /Osage Only | | Oil Operator | Sep 2022 |
| 20740 | NWG Operating LLC | Canyon, TX 79015 | Oil & Gas Operator | Jul 2025 |
| 20741 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Apr 2025 |
| 20742 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | May 2025 |
| 20743 | Ny Oil Inc. | | Oil Operator | Dec 2025 |
| 20744 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 20745 | Nye Exploration & Prod, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 20746 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 20747 | Nylund* J. W. | | Oil Operator | Jul 2000 |
| 20748 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 20749 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 20750 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 20751 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 20752 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | Jul 2025 |
| 20753 | O & G Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 1996 |
| 20754 | O & O Operators, LLC. | Fate, TX 75132 | Oil & Gas Operator | Jul 2025 |
| 20755 | O G & E | Oklahoma City, OK 73124 | Oil & Gas Operator | Feb 2014 |
| 20756 | O H Berry | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 20757 | O Hill Enterprises, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Jan 2014 |
| 20758 | O I L Energy Corp | | Oil & Gas Operator | Oct 2017 |
| 20759 | O I L Niagaran LLC | | Oil & Gas Operator | May 2017 |
| 20760 | O K Swabbing Inc | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 20761 | O S & J Operatin | | Oil Operator | Nov 1984 |
| 20762 | O S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jan 2018 |
| 20763 | O&Apos;Brien Energy Resources Corp | | Oil & Gas Operator | Dec 2024 |
| 20764 | O&G Investments Inc. | Runge, TX 78151 | Oil & Gas Operator | Feb 2003 |
| 20765 | O'Bar Operating Co., Inc. | Longview, TX 75604 | Oil & Gas Operator | Jul 2025 |
| 20766 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Jul 2025 |
| 20767 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 20768 | O'Boyle Energy Corporation | | Oil Operator | Feb 1991 |
| 20769 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 20770 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Jul 2025 |
| 20771 | O'Brien Oil Corporation | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2025 |
| 20772 | O'Brien Oil LLC | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2020 |
| 20773 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 20774 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 20775 | O'Brien, George H. Jr. | Midland, TX 79701 | Oil & Gas Operator | Jun 1994 |
| 20776 | O'Brien, Mae Or Brett Strickland | Belington, WV 26250-0076 | Oil & Gas Operator | Dec 2021 |
| 20777 | O'Brien-Sill | | Oil & Gas Operator | May 2025 |
| 20778 | O'Connell, James P. | Vacaville, CA 95687 | Oil Operator | Nov 2009 |
| 20779 | O'Connor & Hewitt, LTD. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1998 |
| 20780 | O'Connor Energy Management, LLC | Victoria, TX 77902 | Oil Operator | Jul 2025 |
| 20781 | O'Connor, Emma | Hamburg, NY 14075 | Gas Operator | Dec 2024 |
| 20782 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | Jul 2025 |
| 20783 | O'Donnell Bill C | Tulsa, OK 74135-4241 | Oil & Gas Operator | Oct 2014 |
| 20784 | O'Donnell Oil LLC | | Oil & Gas Operator | Apr 2025 |
| 20785 | O'Donohoe, Jack | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2002 |
| 20786 | O'Gorman, Brendan & Wheeler, Anne | North Collins, NY 14111 | Gas Operator | Dec 2024 |
| 20787 | O'Gorman, Kevin | Eden, NY 14057 | Gas Operator | Dec 2024 |
| 20788 | O'Hare Energy Co | | Oil Operator | Dec 1983 |
| 20789 | O'Hern Morris D | Mounds, OK 74047-5163 | Oil & Gas Operator | Sep 2016 |
| 20790 | O'Leary'S Oil & Gas Inc. | Arcadia, FL 34266 | Oil & Gas Operator | May 2008 |
| 20791 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
| 20792 | O'Meara LLC | | Oil & Gas Operator | Oct 2022 |
| 20793 | O'Meara, Inc. | | Oil & Gas Operator | Dec 2006 |
| 20794 | O'Neal Cattle Co. | Pampa, TX 79066 | Gas Operator | Jul 2025 |
| 20795 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | May 2025 |
| 20796 | O'Neal Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Jul 2025 |
| 20797 | O'Neal Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1999 |
| 20798 | O'Neal, Lindell | Nocona, TX 76255 | Oil & Gas Operator | Apr 2025 |
| 20799 | O'Neil Properties LTD | Midland, TX 79702 | Oil & Gas Operator | Jun 2015 |
| 20800 | O'Neil, Pat | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2005 |