| 20901 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Mar 2025 |
| 20902 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Feb 2025 |
| 20903 | Ny Oil Inc. | | Oil Operator | Dec 2025 |
| 20904 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 20905 | Nye Exploration & Prod, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 20906 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 20907 | Nylund* J. W. | | Oil Operator | Jul 2000 |
| 20908 | Nys Natural Gas Co | Englewood, CO 80111-4737 | Gas Operator | Dec 1984 |
| 20909 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 20910 | Nytex Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2014 |
| 20911 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 20912 | Nytis Exploration Company LLC | Lexington, KY 40509 | Oil & Gas Operator | Dec 2021 |
| 20913 | NZ Operating Company Inc. | Houston, TX 77069 | Oil & Gas Operator | May 2025 |
| 20914 | O & G Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 1996 |
| 20915 | O & O Operators, LLC. | Fate, TX 75132 | Oil & Gas Operator | May 2025 |
| 20916 | O G & E | Oklahoma City, OK 73124 | Oil & Gas Operator | Feb 2014 |
| 20917 | O H Berry | Midland, TX 79702 | Oil & Gas Operator | Feb 2003 |
| 20918 | O Hill Enterprises, Inc. | La Grange, TX 78945 | Oil & Gas Operator | Jan 2014 |
| 20919 | O I L Energy Corp | | Oil & Gas Operator | Oct 2017 |
| 20920 | O I L Niagaran LLC | | Oil & Gas Operator | May 2017 |
| 20921 | O K Swabbing Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 20922 | O S & J Operatin | | Oil Operator | Nov 1984 |
| 20923 | O S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jan 2018 |
| 20924 | O&Apos;Brien Energy Resources Corp | | Oil & Gas Operator | Dec 2024 |
| 20925 | O&G Investments Inc. | Runge, TX 78151 | Oil & Gas Operator | Feb 2003 |
| 20926 | O'Bar Operating Co., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2025 |
| 20927 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | May 2025 |
| 20928 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 20929 | O'Boyle Energy Corporation | | Oil Operator | Feb 1991 |
| 20930 | O'Brien Energy Company | Shreveport, LA 71136 | Oil & Gas Operator | Sep 2019 |
| 20931 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | May 2025 |
| 20932 | O'Brien Oil Corporation | Guthrie, OK 73044-3154 | Oil & Gas Operator | Feb 2025 |
| 20933 | O'Brien Oil LLC | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2020 |
| 20934 | O'Brien Operating Company | | Oil & Gas Operator | Dec 2004 |
| 20935 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 20936 | O'Brien, George H. Jr. | Midland, TX 79701 | Oil & Gas Operator | Jun 1994 |
| 20937 | O'Brien, Mae Or Brett Strickland | Belington, WV 26250-0076 | Oil & Gas Operator | Dec 2021 |
| 20938 | O'Brien-Sill | | Oil & Gas Operator | Mar 2025 |
| 20939 | O'Connell, James P. | Vacaville, CA 95687 | Oil Operator | Nov 2009 |
| 20940 | O'Connor & Hewitt, LTD. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1998 |
| 20941 | O'Connor Energy Management, LLC | Victoria, TX 77902 | Oil Operator | May 2025 |
| 20942 | O'Connor, Emma | Hamburg, NY 14075 | Gas Operator | Dec 2023 |
| 20943 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | May 2025 |
| 20944 | O'Donnell Bill C | Tulsa, OK 74135-4241 | Oil & Gas Operator | Oct 2014 |
| 20945 | O'Donnell Oil LLC | | Oil & Gas Operator | Mar 2025 |
| 20946 | O'Donohoe, Jack | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2002 |
| 20947 | O'Gorman, Brendan & Wheeler, Anne | North Collins, NY 14111 | Gas Operator | Dec 2023 |
| 20948 | O'Gorman, Kevin | Eden, NY 14057 | Gas Operator | Dec 2023 |
| 20949 | O'Hare Energy Co | | Oil Operator | Dec 1983 |
| 20950 | O'Hern Morris D | Mounds, OK 74047-5163 | Oil & Gas Operator | Sep 2016 |
| 20951 | O'Leary'S Oil & Gas Inc. | Arcadia, FL 34266 | Oil & Gas Operator | May 2008 |
| 20952 | O'Malley Production Co. Inc. | | Oil & Gas Operator | Mar 1988 |
| 20953 | O'Meara LLC | | Oil & Gas Operator | Oct 2022 |
| 20954 | O'Meara, Inc. | | Oil & Gas Operator | Dec 2006 |
| 20955 | O'Neal Cattle Co. | Pampa, TX 79066 | Gas Operator | May 2025 |
| 20956 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | Mar 2025 |
| 20957 | O'Neal Oil Company | Nocona, TX 76255 | Oil & Gas Operator | May 2025 |
| 20958 | O'Neal Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1999 |
| 20959 | O'Neal, Lindell | Nocona, TX 76255 | Oil & Gas Operator | Mar 2025 |
| 20960 | O'Neil Properties LTD | Midland, TX 79702 | Oil & Gas Operator | Jun 2015 |
| 20961 | O'Neil, Pat | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2005 |
| 20962 | O'Neill Properties, LTD. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 20963 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | May 2025 |
| 20964 | O'Sand Production, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Aug 2003 |
| 20965 | O'Sullivan & Scully, Inc. | | Oil & Gas Operator | Oct 1994 |
| 20966 | O'Sullivan Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2000 |
| 20967 | O'Tool Oil & Gas, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2025 |
| 20968 | O. B. And Keith Whatley | | Oil Operator | Jul 1993 |
| 20969 | O. B. Beck | | Oil Operator | Feb 1991 |
| 20970 | O. B. Mobley | | Oil & Gas Operator | Jul 1989 |
| 20971 | O. B. Mobley, Et Al | | Oil Operator | Jul 1989 |
| 20972 | O. B. Whatley | | Oil Operator | Jul 1993 |
| 20973 | O. D. Maybrier | | Oil Operator | Dec 2011 |
| 20974 | O. F. H., Inc. | | Oil Operator | May 1990 |
| 20975 | O. G., Inc. | | Oil & Gas Operator | Nov 1992 |
| 20976 | O. H. B. Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Sep 2019 |
| 20977 | O. H. M. Operating | Pampa, TX 79065 | Oil & Gas Operator | May 2025 |
| 20978 | O. O. Cummings | | Gas Operator | Jan 1999 |
| 20979 | O.B. Whatley Oil Company, Inc. | | Oil Operator | Feb 2013 |
| 20980 | O.B., Keith & Owen B. Whatley | | Oil Operator | Jul 1989 |
| 20981 | O.G.O. Refining | Luling, TX 78648 | Oil & Gas Operator | Jun 2013 |
| 20982 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | May 2025 |
| 20983 | O.I.L. Energy, Inc. | | Oil & Gas Operator | Dec 1984 |
| 20984 | O.K. Mikeal Joint Venture | Wilmington, DE 19803 | Oil & Gas Operator | Jun 2012 |
| 20985 | O.T. Oil | Kilgore, TX 75663 | Oil Operator | May 2025 |
| 20986 | Oahe Oil Company | Texline, TX 79087 | Oil & Gas Operator | May 2004 |
| 20987 | Oak Dale Drilling Co | Logan, OH 43138-1851-1851 | Oil & Gas Operator | Dec 2015 |
| 20988 | Oak Energy, LLC | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 20989 | Oak Grove Resources, LLC | | Gas Operator | Jan 2025 |
| 20990 | Oak Hill Petroleum Corporation | Oklahoma City, OK 73116-5627 | Oil & Gas Operator | Feb 2025 |
| 20991 | Oak Hills Drilling & Oper., LLC | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 20992 | Oak Hills Energy Inc | Holdenville, OK 74848-0470 | Oil & Gas Operator | Sep 2014 |
| 20993 | Oak Prairie Operations, LLC | The Woodlands, TX 77381 | Oil & Gas Operator | May 2025 |
| 20994 | Oak Resources Inc | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2013 |
| 20995 | Oak Ridge LLC | Wellsville, KS 66092 | Oil Operator | Dec 2019 |
| 20996 | Oak Tree Natural Res LLC | Oklahoma City, OK 73120-5065 | Oil & Gas Operator | Mar 2015 |
| 20997 | Oak Valley Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2015 |
| 20998 | Oak Valley SWD LLC | Enid, OK 73703-4637 | Oil Operator | Aug 2022 |
| 20999 | Oakes Gas Co Inc | Kane, PA 16735-3905 | Gas Operator | Dec 2023 |
| 21000 | Oakfield Energy LLC | | Oil Operator | Jun 2019 |