| 4201 | Tehi Illinois, LLC | Olney, IL 62450 | Oil & Gas Operator | Feb 2019 |
| 4202 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 4203 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 4204 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 4205 | Tekenergy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 4206 | Teko Oil & Gas I | | Oil Operator | Aug 1992 |
| 4207 | Tema Oil And Gas, LLC | Houston, TX 77040 | Oil & Gas Operator | Apr 2000 |
| 4208 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 4209 | Tenex Oil Corpor | | Oil Operator | May 1991 |
| 4210 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | May 2026 |
| 4211 | Tenison Oil Comp | | Oil Operator | Jan 1993 |
| 4212 | Tenk, Lawrence O. | Ottawa, KS 66067 | Oil & Gas Operator | Oct 1998 |
| 4213 | Tenneco Oil Comp | | Oil & Gas Operator | Aug 1995 |
| 4214 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Dec 2025 |
| 4215 | Tepui Ventures | | Gas Operator | May 2026 |
| 4216 | Terra Max Energy | | Oil Operator | Mar 1986 |
| 4217 | Terra Resc Incor | | Oil Operator | Mar 1986 |
| 4218 | Terrol Energy In | | Oil Operator | Feb 1993 |
| 4219 | Terrol Energy Incorporated | Hygiene, CO 80533 | Oil & Gas Operator | Dec 2006 |
| 4220 | Tesoro Petroleum | | Oil Operator | Mar 1982 |
| 4221 | Tet Energy | | Oil Operator | Apr 2026 |
| 4222 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 4223 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | May 2026 |
| 4224 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 4225 | Texaco USA - Mor | | Oil Operator | Aug 1988 |
| 4226 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 4227 | Texas Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 4228 | Texas State Oil Co. | Irving, TX 75062 | Oil & Gas Operator | Mar 2017 |
| 4229 | Texas Tea Oil Company | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 2011 |
| 4230 | Texkan Exploration LLC | Plainville, KS 67663 | Oil Operator | Dec 2019 |
| 4231 | Texkan Resources, LLC | Odessa, TX 79765 | Oil & Gas Operator | Jun 2025 |
| 4232 | Texokan Energy C | | Oil Operator | Nov 1986 |
| 4233 | Texokan Resources, Inc. | Dallas, TX 75206 | Oil Operator | Apr 2012 |
| 4234 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 4235 | Tharp Oil, A General Partnership | Chanute, KS 66720 | Oil Operator | Mar 2014 |
| 4236 | The Bill Bowman Oil Company | | Oil Operator | May 2026 |
| 4237 | The Pyramid Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2009 |
| 4238 | The Raven Company LLC | Granbury, TX 76049 | Oil Operator | Mar 2010 |
| 4239 | The Trees Oil Company | Wichita, KS 67208 | Oil & Gas Operator | Nov 2014 |
| 4240 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Jun 2026 |
| 4241 | Thomas Garner, Inc. | St John, KS 67576 | Oil & Gas Operator | May 2026 |
| 4242 | Thomas M. Brown LLC | Plainville, KS 67663 | Oil Operator | May 2026 |
| 4243 | Thomas Well Serv | | Oil Operator | Dec 1996 |
| 4244 | Thomas Well Service, Inc. | Easton, KS 66020 | Oil Operator | May 2026 |
| 4245 | Thomas, Vernon C. | Gardner, KS 66030 | Oil Operator | Jun 2015 |
| 4246 | Thomason Oil Com | | Oil Operator | Oct 1984 |
| 4247 | Thomason Petroleum, Inc | Hays, KS 67601 | Oil Operator | Jun 2021 |
| 4248 | Thompson Drilling Company, Inc. | Independence, KS 67301 | Oil Operator | Sep 2001 |
| 4249 | Thompson Oil Co. | Corsicana, TX 75151 | Oil & Gas Operator | Jul 2026 |
| 4250 | Thompson, Don W | Herington, KS 67449 | Oil Operator | Jul 2003 |
| 4251 | Thomsen Brothers Co., LLC | Lamont, KS 66855 | Oil Operator | May 2026 |
| 4252 | Thornberry Family Partnership LTD. | New Waverly, TX 77358 | Oil Operator | Apr 2026 |
| 4253 | Thorne Harold & | | Oil Operator | May 1994 |
| 4254 | Thornton Drilling Company Ptrnship | Eureka, KS 67045 | Oil Operator | Jun 2010 |
| 4255 | Thornton Oil Co. | Abilene, TX 79603 | Oil & Gas Operator | Aug 2003 |
| 4256 | Thoroughbred Associates LLC | Wichita, KS 67226 | Oil & Gas Operator | May 2026 |
| 4257 | Three Bros. Energy, Inc. | Ponca City, OK 74601 | Gas Operator | Dec 2013 |
| 4258 | Three D Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 4259 | Three D Resources Inc | Liberal, KS 67905 | Oil & Gas Operator | May 2026 |
| 4260 | Three Rivers Exploration LLC | Olpe, KS 66865 | Oil Operator | Sep 2023 |
| 4261 | Thresher Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2026 |
| 4262 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jul 2026 |
| 4263 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 4264 | Thunderbird Drilling, Inc. | Wichita, KS 67207 | Oil Operator | Oct 2008 |
| 4265 | Thunderbird Oil | | Oil Operator | Oct 1991 |
| 4266 | Thunderbolt Construction Corp. | Louisburg, KS 66053 | Oil Operator | Oct 2024 |
| 4267 | Thurber, Gueydon | Horseshoe Bay, TX 78657 | Oil Operator | May 2001 |
| 4268 | Tidal Wave Energy, Inc. | New Castle, PA 16105 | Oil & Gas Operator | Jun 2022 |
| 4269 | Tidd, Frankie | Neosho Falls, KS 66758 | Oil Operator | Nov 1996 |
| 4270 | Tidd, Gary D. | Piqua, KS 66761 | Oil Operator | May 2016 |
| 4271 | Timberlake Energy Corporation | Cypress, TX 77429 | Oil Operator | Nov 2013 |
| 4272 | Timberline Oil & | | Oil & Gas Operator | Jul 1995 |
| 4273 | Timberline Oil & Gas | | Oil & Gas Operator | Sep 1995 |
| 4274 | Timberline Oil & Gas Corporation | Rapid City, SD 57702 | Oil & Gas Operator | May 2026 |
| 4275 | Tinsmon, J. Corry | Wichita, KS 67226 | Oil Operator | Dec 2009 |
| 4276 | Titan Energy Corp | Thomasville, AL 36784 | Oil & Gas Operator | Aug 2009 |
| 4277 | TK Electric & Oilfield Service, LLC | Plainville, KS 67663 | Oil Operator | May 2026 |
| 4278 | Tko Investments, Inc. | Dodge City, KS 67801 | Oil & Gas Operator | May 2026 |
| 4279 | TM Enterprises, Inc. | Wichita, KS 67278 | Oil Operator | Dec 2019 |
| 4280 | TMM Investments LTD. | Tyler, TX 75703 | Oil Operator | Feb 2026 |
| 4281 | TNT Energy LLC | Paola, KS 66071 | Oil Operator | Dec 2009 |
| 4282 | TNT Well Servicing, Inc. | Pratt, KS 67124 | Oil Operator | Jun 2006 |
| 4283 | Todd C H Incorpo | | Oil & Gas Operator | Feb 1994 |
| 4284 | Todd, Marc E | Wichita, KS 67203 | Oil Operator | May 2026 |
| 4285 | Toil Inc. | Neodesha, KS 66757 | Oil & Gas Operator | May 2026 |
| 4286 | Tom Brown Construction, Inc. | Astor, FL 32102 | Oil Operator | May 2026 |
| 4287 | Tom'S Oil | | Oil Operator | Apr 2026 |
| 4288 | Tomco Oil Incorp | | Oil Operator | Nov 1989 |
| 4289 | Tomco Oil, Inc. | Atlanta, KS 67008 | Oil & Gas Operator | May 2026 |
| 4290 | Tomkat Limited | | Oil & Gas Operator | Jul 1995 |
| 4291 | Tomkat, LTD. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2009 |
| 4292 | Tomlinson Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | Mar 2026 |
| 4293 | Tomlinson Operating, LLC | Ketchum, ID 83340 | Oil & Gas Operator | Oct 2014 |
| 4294 | Tomlinson, Sid | Hays, KS 67601 | Oil & Gas Operator | Sep 2002 |
| 4295 | Tonda Oil Company | Independence, KS 67301 | Oil & Gas Operator | Jul 1996 |
| 4296 | Tontol, LLC | Scottsdale, AZ 85250 | Oil Operator | May 2026 |
| 4297 | Topat Oil Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2017 |
| 4298 | Toshic Dynamics, LLC | Scottsdale, AZ 85251 | Oil Operator | Nov 2006 |
| 4299 | Toto Energy, LLC | Spring, TX 77380 | Oil & Gas Operator | Dec 2019 |
| 4300 | Totten Resources | | Oil Operator | Sep 2007 |