| 201 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 202 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 203 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
| 204 | Taylor Oil Company | Edmond, OK 73034 | Oil & Gas Operator | Dec 2025 |
| 205 | Teichgraeber Oil | | Oil Operator | Nov 1995 |
| 206 | Teichgraeber Oil Co. | | Oil Operator | Dec 1994 |
| 207 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 208 | Thomsen Brothers Co., LLC | Lamont, KS 66855 | Oil Operator | Dec 2025 |
| 209 | Thornton Drilling Company Ptrnship | Eureka, KS 67045 | Oil Operator | Jun 2010 |
| 210 | Three D Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 211 | Three Rivers Exploration LLC | Olpe, KS 66865 | Oil Operator | Sep 2023 |
| 212 | Timberline Oil & | | Oil & Gas Operator | Jul 1995 |
| 213 | TM Enterprises, Inc. | Wichita, KS 67278 | Oil Operator | Dec 2019 |
| 214 | Tremo Corporation | Toronto, KS 66777 | Oil Operator | May 1998 |
| 215 | Trimble & Maclaskey Oil LLC | Gridley, KS 66852 | Oil Operator | Dec 2025 |
| 216 | Triple "S" Well Service, Inc. | Eureka, KS 67045 | Oil Operator | Nov 2025 |
| 217 | Triple S Well Se | | Oil Operator | Dec 1996 |
| 218 | Triple Seven, Inc. | Oklahoma City, OK 73132 | Oil & Gas Operator | Nov 1997 |
| 219 | Tyrok | | Oil & Gas Operator | Nov 2010 |
| 220 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 221 | Van Buskirk Bill | | Oil Operator | Dec 1996 |
| 222 | Van Buskirk, Billy L. | Severy, KS 67137 | Oil Operator | Dec 2009 |
| 223 | Van Oil, Inc. | Madison, KS 66860 | Oil & Gas Operator | Oct 2025 |
| 224 | Verde Oil Company | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2025 |
| 225 | Viking Production LLC | Fredonia, KS 66736 | Oil Operator | Mar 2016 |
| 226 | Viva International, Inc. | Overland Park, KS 66207 | Oil Operator | Jun 2023 |
| 227 | Wallace Energy Inc | Denver, CO 80202-4327 | Oil Operator | Jun 2015 |
| 228 | Warhorse Petroleum Inc | Lafayette, CO 80026 | Oil Operator | Dec 2025 |
| 229 | Watts Tank Truck Service, Inc. | Hamilton, KS 66853 | Oil Operator | Dec 2025 |
| 230 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2025 |
| 231 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 232 | White Pine Petroleum Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 233 | Wiedemann K T TR | | Oil Operator | Jul 1992 |
| 234 | Williams Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 235 | Williams, E. L. | Emporia, KS 66801 | Oil & Gas Operator | Nov 1988 |
| 236 | Wilson Richard A | | Oil Operator | Dec 2009 |
| 237 | Winterscheid Oil, LLC | Olpe, KS 66865 | Oil Operator | Dec 2019 |
| 238 | Wolfe Energy, LLC | | Oil Operator | Dec 2025 |
| 239 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |