| 5901 | Texas Energy & Environmental | Houston, TX 77070 | Oil & Gas Operator | Nov 1998 |
| 5902 | Texas Energy Mutual LLC | Grapevine, TX 76051-8145 | Oil Operator | Jun 2018 |
| 5903 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 5904 | Texas Meridian Operating Co. Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 1993 |
| 5905 | Texas Mineral Group | Midland, TX 79705 | Oil & Gas Operator | Aug 2013 |
| 5906 | Texas Moran Exploration Company | Houston, TX 77098 | Oil & Gas Operator | Jun 2023 |
| 5907 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 5908 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 5909 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 5910 | Texcel Exploration, Inc. | Colorado SPGS, CO 80960 | Oil & Gas Operator | May 2025 |
| 5911 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 5912 | Texinia Limited Partnership | Dallas, TX 75201 | Gas Operator | Jan 2017 |
| 5913 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Feb 2025 |
| 5914 | Texland Petroleum Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2003 |
| 5915 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 5916 | Texoma Oil & Gas Corporation | Longview, TX 75604-3137 | Oil Operator | Apr 2014 |
| 5917 | Texxon Resources, Inc. | Winter Park, FL 32792 | Oil & Gas Operator | May 2025 |
| 5918 | TGT Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Jan 2025 |
| 5919 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 5920 | Thayer Exploration Company | Wetumka, OK 74883 | Gas Operator | Dec 1996 |
| 5921 | The Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 5922 | The Dehart Company LLC | Ardmore, OK 73402-0907 | Oil Operator | Feb 2025 |
| 5923 | The Elliott Oil Corporation | | Oil & Gas Operator | Feb 2025 |
| 5924 | The Guinn Company LLC | Asher, OK 74826-6012 | Oil & Gas Operator | Oct 2024 |
| 5925 | The KT Oil Company LLC | Ada, OK 74820 | Oil Operator | Feb 2025 |
| 5926 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2025 |
| 5927 | The Twenty Eleven Corp Inc | Ada, OK 74820-3605 | Oil Operator | Feb 2025 |
| 5928 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 5929 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Feb 2025 |
| 5930 | Thomas B Rixleben | | Oil & Gas Operator | Jul 2008 |
| 5931 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 5932 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2025 |
| 5933 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 5934 | Thomas Oil Company LLC | Ardmore, OK 73401-3717 | Oil Operator | Mar 2025 |
| 5935 | Thomas Production | Electra, TX 76360 | Oil & Gas Operator | Mar 2015 |
| 5936 | Thomas Wayne Oil & Gas | Bristow, OK 74010-0544 | Oil & Gas Operator | Jan 2018 |
| 5937 | Thomas, Ellis W | | Oil & Gas Operator | Feb 2025 |
| 5938 | Thomas, R. W. Inc. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 5939 | Thompson Felton | Dewey, OK 74029 | Oil Operator | Jul 1999 |
| 5940 | Thompson James R | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2025 |
| 5941 | Thompson Operating Co. | Abernathy, TX 79311 | Oil & Gas Operator | Aug 1994 |
| 5942 | Thompson Roy G | Bartlesville, OK 74006 | Oil & Gas Operator | Feb 1993 |
| 5943 | Thompson, Joe L., Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Oct 2005 |
| 5944 | THR Oil | Konawa, OK 74849 | Oil & Gas Operator | Jan 2014 |
| 5945 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | May 2025 |
| 5946 | Three MG Family Inc | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 5947 | Three Sands Investment Company | Waukomis, OK 73773 | Oil & Gas Operator | Jan 2025 |
| 5948 | Three Sands Oil Inc | Perry, OK 73077 | Oil & Gas Operator | May 2023 |
| 5949 | Three-D Resources, Inc. | Liberal, KS 67905 | Oil & Gas Operator | Jan 2025 |
| 5950 | Three-N-One | | Oil Operator | Oct 2020 |
| 5951 | Threet David Allen | Sand Springs, OK 74063-4035 | Oil & Gas Operator | Feb 2025 |
| 5952 | Threshold Development Company | Fort Worth, TX 76109 | Oil & Gas Operator | Aug 2016 |
| 5953 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2025 |
| 5954 | Thunder Petroleum LLC | Owasso, OK 74055-1563 | Oil Operator | Sep 2022 |
| 5955 | Tickel Jim & Cindy | Blackwell, OK 74631-6015 | Oil Operator | Jan 2013 |
| 5956 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 5957 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 5958 | Tidemark Exploration Inc | Tulsa, OK 74120 | Oil & Gas Operator | Apr 2019 |
| 5959 | Tidewater Operating Co Inc | Tulsa, OK 74136-6308 | Oil & Gas Operator | Feb 2025 |
| 5960 | Tidwell Oil LLC | Roff, OK 74865 | Oil Operator | Feb 2022 |
| 5961 | Tiger Eye Resources LLC | Hockley, TX 77447-6911 | Oil Operator | Oct 2012 |
| 5962 | Tiger Mountain Gas & Oil | Oklahoma City, OK 73118 | Gas Operator | Sep 1999 |
| 5963 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 5964 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Mar 2025 |
| 5965 | Tilford Pinson Exploration LLC | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 5966 | Tilley Matt Dba Tilley Oil Co | Hominy, OK 74035 | Oil & Gas Operator | Feb 2025 |
| 5967 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | May 2025 |
| 5968 | Tilley Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Mar 2025 |
| 5969 | Tillman Consulting LLC Dba B & C Operating | Mustang, OK 73064-8195 | Oil Operator | Jan 2022 |
| 5970 | Timber Hill Energy | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 2011 |
| 5971 | Timbercreek Oil Company LLC | Healdton, OK 73438 | Oil Operator | Mar 2025 |
| 5972 | Tindall Operating Company | Englewood, CO 80112 | Oil & Gas Operator | Nov 2024 |
| 5973 | Tindol Jr Robert | Ryan, OK 73565 | Oil Operator | Oct 2009 |
| 5974 | Tipperary Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | May 2014 |
| 5975 | Titan Oil & Gas Corporation | Edmond, OK 73013-5417 | Oil & Gas Operator | Feb 2025 |
| 5976 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Mar 2025 |
| 5977 | TJ Oil Company | Borger, TX 79008 | Oil & Gas Operator | May 2025 |
| 5978 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2025 |
| 5979 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Dec 2024 |
| 5980 | TLC Oil And Gas | Duncan, OK 73533-9477 | Oil & Gas Operator | Oct 2015 |
| 5981 | TLM Resources Inc | Enid, OK 73706-0641 | Gas Operator | Mar 2015 |
| 5982 | TLS Oil & Gas Inc | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Feb 2025 |
| 5983 | TLS Operating Company | Greenwood VIlge, CO 80111 | Oil & Gas Operator | Dec 2013 |
| 5984 | TNT Energy Inc. | Brownwood, TX 76801 | Oil & Gas Operator | May 2013 |
| 5985 | TNT Enterprizes | Coweta, OK 74429 | Oil & Gas Operator | Nov 2005 |
| 5986 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2024 |
| 5987 | Toco Oil & Gas Co | Grapevine, TX 76051 | Oil & Gas Operator | Feb 1993 |
| 5988 | Todd John C | Oklahoma City, OK 73112-8049 | Oil & Gas Operator | May 2015 |
| 5989 | Token Operating, LLC | Enid, OK 73703-1094 | Oil & Gas Operator | Mar 2025 |
| 5990 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 5991 | Toklan Oil Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 5992 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | May 2025 |
| 5993 | Toland & Johnston Inc | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 5994 | Tolson Gary | Seminole, OK 74868-3267 | Oil & Gas Operator | Feb 2025 |
| 5995 | Toma Explorations LLC | Shawnee, OK 74801-6925 | Oil & Gas Operator | Jan 2025 |
| 5996 | Tomar Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2001 |
| 5997 | Tomlinson Interest | | Oil & Gas Operator | Jun 2013 |
| 5998 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2025 |
| 5999 | Tomlinson W E | Comanche, OK 73529-9561 | Oil Operator | Aug 1996 |
| 6000 | Tomorrows Energy Exploration Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Dec 2024 |