| 101 | Thornton Oil Co. | Abilene, TX 79603 | Oil & Gas Operator | Aug 2003 |
| 102 | Thoroughbred Associates LLC | Wichita, KS 67226 | Oil & Gas Operator | Dec 2025 |
| 103 | Three Bros. Energy, Inc. | Ponca City, OK 74601 | Gas Operator | Dec 2013 |
| 104 | Three D Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 105 | Three D Resources Inc | Liberal, KS 67905 | Oil & Gas Operator | Dec 2025 |
| 106 | Three Rivers Exploration LLC | Olpe, KS 66865 | Oil Operator | Sep 2023 |
| 107 | Thresher Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2026 |
| 108 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2026 |
| 109 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 110 | Thunderbird Drilling, Inc. | Wichita, KS 67207 | Oil Operator | Oct 2008 |
| 111 | Thunderbird Oil | | Oil Operator | Oct 1991 |
| 112 | Thunderbolt Construction Corp. | Louisburg, KS 66053 | Oil Operator | Oct 2024 |
| 113 | Thurber, Gueydon | Horseshoe Bay, TX 78657 | Oil Operator | May 2001 |
| 114 | Tidal Wave Energy, Inc. | New Castle, PA 16105 | Oil & Gas Operator | Jun 2022 |
| 115 | Tidd, Frankie | Neosho Falls, KS 66758 | Oil Operator | Nov 1996 |
| 116 | Tidd, Gary D. | Piqua, KS 66761 | Oil Operator | May 2016 |
| 117 | Timberlake Energy Corporation | Cypress, TX 77429 | Oil Operator | Nov 2013 |
| 118 | Timberline Oil & | | Oil & Gas Operator | Jul 1995 |
| 119 | Timberline Oil & Gas | | Oil & Gas Operator | Sep 1995 |
| 120 | Timberline Oil & Gas Corporation | Rapid City, SD 57702 | Oil & Gas Operator | Dec 2025 |
| 121 | Tinsmon, J. Corry | Wichita, KS 67226 | Oil Operator | Dec 2009 |
| 122 | Titan Energy Corp | Thomasville, AL 36784 | Oil & Gas Operator | Aug 2009 |
| 123 | TK Electric & Oilfield Service, LLC | Plainville, KS 67663 | Oil Operator | Dec 2025 |
| 124 | Tko Investments, Inc. | Dodge City, KS 67801 | Oil & Gas Operator | Dec 2025 |
| 125 | TM Enterprises, Inc. | Wichita, KS 67278 | Oil Operator | Dec 2019 |
| 126 | TMM Investments LTD. | Tyler, TX 75703 | Oil Operator | Dec 2024 |
| 127 | TNT Energy LLC | Paola, KS 66071 | Oil Operator | Dec 2009 |
| 128 | TNT Well Servicing, Inc. | Pratt, KS 67124 | Oil Operator | Jun 2006 |
| 129 | Todd C H Incorpo | | Oil & Gas Operator | Feb 1994 |
| 130 | Todd, Marc E | Wichita, KS 67203 | Oil Operator | Dec 2025 |
| 131 | Toil Inc. | Neodesha, KS 66757 | Oil & Gas Operator | Dec 2025 |
| 132 | Tom Brown Construction, Inc. | Astor, FL 32102 | Oil Operator | Dec 2025 |
| 133 | Tom'S Oil | | Oil Operator | Dec 2025 |
| 134 | Tomco Oil Incorp | | Oil Operator | Nov 1989 |
| 135 | Tomco Oil, Inc. | Atlanta, KS 67008 | Oil & Gas Operator | Dec 2025 |
| 136 | Tomkat Limited | | Oil & Gas Operator | Jul 1995 |
| 137 | Tomkat, LTD. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2009 |
| 138 | Tomlinson Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | May 2025 |
| 139 | Tomlinson Operating, LLC | Ketchum, ID 83340 | Oil & Gas Operator | Oct 2014 |
| 140 | Tomlinson, Sid | Hays, KS 67601 | Oil & Gas Operator | Sep 2002 |
| 141 | Tonda Oil Company | Independence, KS 67301 | Oil & Gas Operator | Jul 1996 |
| 142 | Tontol, LLC | Scottsdale, AZ 85250 | Oil Operator | Nov 2025 |
| 143 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 144 | Toshic Dynamics, LLC | Scottsdale, AZ 85251 | Oil Operator | Nov 2006 |
| 145 | Toto Energy, LLC | Spring, TX 77380 | Oil & Gas Operator | Dec 2019 |
| 146 | Totten Resources | | Oil Operator | Sep 2007 |
| 147 | Touchstone Trading & Transportation Inc | | Oil Operator | Mar 2025 |
| 148 | Tower Oil & Gas Company Inc | Englewood, CO 80111 | Oil & Gas Operator | May 2001 |
| 149 | Town Oil Co. | Paola, KS 66071 | Oil & Gas Operator | Dec 2025 |
| 150 | Townes, Don | Clarksville, TX 75426 | Oil & Gas Operator | Apr 2026 |
| 151 | TR Crude LLC | Independence, KS 67301 | Oil Operator | Aug 2024 |
| 152 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 153 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Feb 2026 |
| 154 | Trans Resource D | | Oil Operator | May 1991 |
| 155 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Nov 2025 |
| 156 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 157 | Transamerica Oil Corporation | Hutchinson, KS 67504 | Gas Operator | Mar 2025 |
| 158 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 159 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 160 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 161 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Apr 2026 |
| 162 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 163 | Trepco Production Company Inc | Yukon, OK 73099 | Oil & Gas Operator | Feb 2026 |
| 164 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Dec 2025 |
| 165 | Tri-J Tubulars, Inc. | Wichita, KS 67202 | Oil Operator | Aug 1996 |
| 166 | Tri-L Oil Co. | | Oil Operator | Sep 2015 |
| 167 | Trich Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 168 | Trigg Exploratio | | Gas Operator | Feb 1992 |
| 169 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Dec 2025 |
| 170 | Trimble, IVal L. | Gridley, KS 66852 | Oil Operator | Dec 2019 |
| 171 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Apr 2026 |
| 172 | Trinity Resources, Inc. | Houston, TX 77277 | Oil & Gas Operator | May 2020 |
| 173 | Triple "S" Well Service, Inc. | Eureka, KS 67045 | Oil Operator | Nov 2025 |
| 174 | Triple 'H' Oil O | | Oil Operator | Apr 1992 |
| 175 | Triple - I, Inc. | Kansas City, MO 64114 | Gas Operator | Oct 2000 |
| 176 | Triple B Crude, LLC | Colony, KS 66015 | Oil Operator | Nov 2025 |
| 177 | Triple C Petroleum LLC | Colony, KS 66015 | Oil Operator | Nov 2019 |
| 178 | Triple Crown Operating LLC | Tulsa, OK 74114 | Oil Operator | Dec 2025 |
| 179 | Triple E Drillin | | Oil Operator | Jun 1992 |
| 180 | Triple E Oil | Sterling, KS 67579 | Oil & Gas Operator | Mar 1999 |
| 181 | Triple G Oilfiel | | Oil & Gas Operator | Dec 1985 |
| 182 | Triple J L.L.C. | Coffeyville, KS 67336 | Oil Operator | Mar 1999 |
| 183 | Triple J Prod In | | Oil Operator | Sep 1989 |
| 184 | Triple K | | Oil Operator | Jun 2007 |
| 185 | Triple S Construction | Blue Mound, KS 66010 | Gas Operator | Dec 2025 |
| 186 | Triple S Well Se | | Oil Operator | Dec 1996 |
| 187 | Triple Seven, Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Nov 1997 |
| 188 | Triple T Oil, LLC | Louisburg, KS 66053 | Oil Operator | Dec 2025 |
| 189 | Triple T Pipelines, Inc. | Frontenac, KS 66763 | Oil & Gas Operator | Dec 2025 |
| 190 | Triple T Resources, LP | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 191 | Triple-T Pipelin | | Oil & Gas Operator | Oct 1995 |
| 192 | Tripower Resources LLC | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2026 |
| 193 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 194 | Tritex Resc Inco | | Oil Operator | Dec 1985 |
| 195 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 196 | Triunited Investors, LLC | Monte Sereno, CA 95030 | Oil Operator | May 2012 |
| 197 | Troy Jaco, Inc. | Sherman, TX 75091 | Oil Operator | Dec 2018 |
| 198 | Troy Resources C | | Oil Operator | Jun 1990 |
| 199 | Troyer, Wayne A. | Galva, KS 67443 | Oil Operator | Jun 1997 |
| 200 | True Oil Company | Casper, WY 82602 | Oil & Gas Operator | Aug 2003 |