| 301 | Steinle Oil | | Oil Operator | Aug 2021 |
| 302 | Stephenson L G & | | Oil Operator | Apr 1987 |
| 303 | Sterling Petrole | | Oil & Gas Operator | Sep 1992 |
| 304 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |
| 305 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Jun 2025 |
| 306 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 307 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 308 | Tdi, Inc. | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 309 | Te-Pe Oil & Gas | | Oil & Gas Operator | Jun 2025 |
| 310 | Tengasco, Inc. | Houston, TX 77063 | Oil & Gas Operator | Jun 2025 |
| 311 | Terra Resc Incor | | Oil Operator | Mar 1986 |
| 312 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 313 | Tom Brown Construction, Inc. | Astor, FL 32102 | Oil Operator | May 2025 |
| 314 | Tomlinson, Sid | Hays, KS 67601 | Oil & Gas Operator | Sep 2002 |
| 315 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jul 2025 |
| 316 | Trapp Oil Oper - | | Oil Operator | Aug 1989 |
| 317 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 318 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | Oct 2025 |
| 319 | Tri United, Inc | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 320 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 321 | V. Francis Weigel Family Partnership LLC | Gorham, KS 67640 | Oil Operator | Jun 2025 |
| 322 | Vantage Petroleum, Inc. | Olmitz, KS 67564 | Oil Operator | May 2008 |
| 323 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 324 | Viking Resources | | Oil & Gas Operator | Sep 1995 |
| 325 | Vonfeldt Oil Ope | | Oil Operator | Oct 1994 |
| 326 | Vonfeldt, Alan J | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 327 | Vonfeldt, Steven R | Russell, KS 67665 | Oil Operator | May 2025 |
| 328 | War Cry, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 329 | Webco Oil Company, Inc. | Hoisington, KS 67544 | Oil Operator | Jun 2025 |
| 330 | Weeks, VIrginia | Hoisington, KS 67544 | Oil Operator | Mar 2002 |
| 331 | Weigel Oil Company, LLC | Gorham, KS 67640 | Oil Operator | Jun 2025 |
| 332 | Weigel V Francis | | Oil Operator | Mar 1994 |
| 333 | Weigel, V. Francis - Family Partnership | Gorham, KS 67640 | Oil Operator | Jul 2004 |
| 334 | Weilert Enterpri | | Oil Operator | Sep 1988 |
| 335 | Weilert, S.R. | Wichita, KS 67216 | Oil Operator | Oct 1998 |
| 336 | Western Kansas E | | Oil Operator | Aug 1993 |
| 337 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 338 | White Eagle Reso | | Oil Operator | Dec 1996 |
| 339 | White Eagle Resources Corp. | Taos, NM 87571 | Oil & Gas Operator | Jun 2016 |
| 340 | Widrig Donald N | | Oil Operator | May 1988 |
| 341 | Wilkinson Drilli | | Oil Operator | Dec 1991 |
| 342 | Win Oil Company | Russell, KS 67665 | Oil & Gas Operator | Jul 2021 |
| 343 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |
| 344 | Wren Investments | | Oil Operator | Feb 1991 |
| 345 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jul 2025 |
| 346 | Yost Oil Operati | | Oil Operator | Jul 1990 |
| 347 | Yost, M. A. | Russell, KS 67665 | Oil Operator | Aug 1990 |
| 348 | Younger Bernard | | Oil Operator | Nov 1992 |
| 349 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 350 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |