| 1001 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 1002 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 1003 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 1004 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 1005 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Sep 2024 |
| 1006 | Swan Oil Co | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 1007 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 1008 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 1009 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2024 |
| 1010 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 1011 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 1012 | Tag Petroleum Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2021 |
| 1013 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 1014 | Tank Truck'S Inc | Sapulpa, OK 74066 | Oil Operator | Nov 2024 |
| 1015 | Tap Petroleum Inc | Cleveland, OK 74020-0054 | Oil & Gas Operator | Apr 2020 |
| 1016 | Tarwater Oil & Gas LLC | San Jose, CA 95128-4219 | Oil & Gas Operator | Dec 2023 |
| 1017 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 1018 | Taylor International Inc | Drumright, OK 74030-1173 | Oil & Gas Operator | Mar 2020 |
| 1019 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 1020 | Tee Cee'S Inc | Drumright, OK 74030-3855 | Oil & Gas Operator | Oct 2024 |
| 1021 | Ten Grand Energy Company Inc | Nachogdoches, TX 75963-1880 | Oil Operator | Mar 2011 |
| 1022 | Terra Production Company | Okemah, OK 74859-5924 | Oil & Gas Operator | Apr 2020 |
| 1023 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 1024 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Aug 2024 |
| 1025 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 1026 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 1027 | Texas Energy Mutual LLC | Grapevine, TX 76051-8145 | Oil Operator | Jun 2018 |
| 1028 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 1029 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 1030 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Sep 2024 |
| 1031 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 1032 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Oct 2024 |
| 1033 | Thomas Oil Company LLC | Ardmore, OK 73401-3717 | Oil Operator | Oct 2024 |
| 1034 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 1035 | Thunder Petroleum LLC | Owasso, OK 74055-1563 | Oil Operator | Sep 2022 |
| 1036 | Tidewater Operating Co Inc | Tulsa, OK 74136-6308 | Oil & Gas Operator | Oct 2024 |
| 1037 | Todd John C | Oklahoma City, OK 73112-8049 | Oil & Gas Operator | May 2015 |
| 1038 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 1039 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Dec 2024 |
| 1040 | Tomorrows Energy Exploration Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Aug 2024 |
| 1041 | Topsail Secondary Recovery LLC | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 1042 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 1043 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 1044 | Trace Operating Co & R Hudson | Pawhuska, OK 74056 | Oil & Gas Operator | Aug 2013 |
| 1045 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Sep 2024 |
| 1046 | Trailblazer Energy LLC | Plano, TX 75075 | Oil & Gas Operator | Oct 2024 |
| 1047 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |
| 1048 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 1049 | Trend Gas & Oil Inc | Jenks, OK 74037 | Oil & Gas Operator | Dec 2000 |
| 1050 | Trilliant Energy Texas LTD | Tulsa, OK 74135-0767 | Oil & Gas Operator | Jun 2020 |
| 1051 | Triple W Oil Inc | Chandler, OK 74834-0546 | Oil & Gas Operator | May 2013 |
| 1052 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 1053 | Trivestco Energy Company | Ponca City, OK 74601 | Oil & Gas Operator | Sep 2024 |
| 1054 | Trojan Resources LLC | Sapulpa, OK 74066-8095 | Oil Operator | Sep 2024 |
| 1055 | Troyer Howard E | Tulsa, OK 74133-8016 | Oil & Gas Operator | Dec 2014 |
| 1056 | True Performance Administrators LLC | Tulsa, OK 74137 | Oil & Gas Operator | Oct 2024 |
| 1057 | Tulsa Energy Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2013 |
| 1058 | Tulsa Energy Partners LLC | Tulsa, OK 74103-4461 | Oil & Gas Operator | Sep 2024 |
| 1059 | Tulsa Minerals Inc | Tulsa, OK 74136-1045 | Oil & Gas Operator | May 2013 |
| 1060 | Turner John O | Drumright, OK 74030-1216 | Oil & Gas Operator | Feb 1998 |
| 1061 | Tuscany Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2014 |
| 1062 | Two Pines | Drumright, OK 74030-5502 | Oil & Gas Operator | Feb 2012 |
| 1063 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 1064 | Tyler Enterprises Inc | Bristow, OK 74010-3192 | Oil & Gas Operator | Feb 2004 |
| 1065 | U S Oil Reclaimers LLC | Drumright, OK 74030-1155 | Oil Operator | Jun 2023 |
| 1066 | U.S. Energy Development Corp | Arlington, TX 76011 | Oil & Gas Operator | Dec 2024 |
| 1067 | Umberham Oil Company Inc | Oklahoma City, OK 73151-4000 | Oil & Gas Operator | Oct 2024 |
| 1068 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 1069 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 1070 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Sep 2024 |
| 1071 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Oct 2024 |
| 1072 | United Oil Corporation | Denver, CO 80202-3813 | Oil & Gas Operator | Sep 2024 |
| 1073 | United Primary Resources Inc | Milton, WA 98354-9361 | Oil & Gas Operator | Feb 2016 |
| 1074 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 1075 | Uplands Resources Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Sep 2024 |
| 1076 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 1077 | Usedc Okc LLC | Getzville, NY 14068-1296 | Oil & Gas Operator | May 2018 |
| 1078 | Vaco Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2003 |
| 1079 | Valar Petroleum Inc | Houston, TX 77069 | Oil & Gas Operator | May 2006 |
| 1080 | Van Horn I H | Tulsa, OK 74145-5715 | Oil & Gas Operator | Mar 2001 |
| 1081 | Van Orsdol Paul | Bristow, OK 74010 | Oil & Gas Operator | Oct 2024 |
| 1082 | Van Zandt Marilyn | Depew, OK 74028 | Gas Operator | Oct 2024 |
| 1083 | Varner Jerry D And Helen Revocable Inter VIvos Trust | Bristow, OK 74010 | Oil Operator | Sep 2024 |
| 1084 | Vectra CBM LLC | Littleton, CO 80128-4557 | Gas Operator | Jan 2014 |
| 1085 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2024 |
| 1086 | Ventura Energy Services LLC | Tulsa, OK 74136-5108 | Oil & Gas Operator | Mar 2020 |
| 1087 | Veteran Exploration & Prod, LLC | Frisco, TX 75034 | Oil & Gas Operator | Dec 2024 |
| 1088 | Vike Oil Inc | Cushing, OK 74023-6509 | Oil & Gas Operator | Sep 2024 |
| 1089 | Vincent Production Company | | Oil & Gas Operator | Dec 2006 |
| 1090 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 1091 | W P Oil & Gas LLC | Coweta, OK 74429-5465 | Oil & Gas Operator | Mar 2015 |
| 1092 | Wachob Oil & Gas LLC | Sapulpa, OK 74066-6987 | Oil Operator | Jun 2015 |
| 1093 | Waelder Oil & Gas, Inc. | Fort Smith, AR 72903 | Oil & Gas Operator | Sep 2024 |
| 1094 | Waggoner Drilling Company | Bristow, OK 74010-0663 | Oil & Gas Operator | Jan 2014 |
| 1095 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 1096 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 1097 | Wandering Star Partners #1 LLLP | | Oil & Gas Operator | Apr 2015 |
| 1098 | Ward Kelly | Drumright, OK 74030-5661 | Oil & Gas Operator | Feb 2015 |
| 1099 | Warner Gona Revocable Trust | Sand Springs, OK 74063-5296 | Oil & Gas Operator | May 2009 |
| 1100 | Warner Production LLC | Mannford, OK 74044-6182 | Oil & Gas Operator | Oct 2024 |