| 301 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Dec 2025 |
| 302 | Rodeo Resources | | Oil Operator | Jul 1986 |
| 303 | Ron Brooks Corp | | Oil Operator | Sep 1995 |
| 304 | RSD Minerals LLC | Wichita, KS 67206 | Oil Operator | Dec 2025 |
| 305 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Dec 2025 |
| 306 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Dec 2025 |
| 307 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 2026 |
| 308 | S & S Oil Leasing | Chase, KS 67524 | Oil Operator | Dec 2025 |
| 309 | S & S Oil, L.L.C. | Chase, KS 67524 | Oil Operator | Dec 2025 |
| 310 | Samson Resources | | Oil Operator | Jan 1994 |
| 311 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 312 | Scheck Oil Operation | | Oil & Gas Operator | Dec 2025 |
| 313 | Schmidt, Terry D. | McPherson, KS 67460 | Oil Operator | Dec 2025 |
| 314 | Schulz Oil & Gas, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2024 |
| 315 | Schulz Roger A | | Oil & Gas Operator | Dec 1996 |
| 316 | Sher-Lon Corpora | | Oil Operator | Apr 1994 |
| 317 | Smith Oil Operations | | Oil & Gas Operator | Dec 2025 |
| 318 | Smith Richard F | | Oil Operator | Jun 1995 |
| 319 | Smokey Valley Resources | Lyons, KS 67554 | Oil Operator | Jun 1998 |
| 320 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 321 | South Bay Oil Corporation | Wichita, KS 67202 | Oil Operator | Dec 2019 |
| 322 | Southern Star Central Gas Pipeline Inc | Owensboro, KY 42301 | Oil & Gas Operator | Jan 2026 |
| 323 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 324 | Spess Oil Company, A General Partnership | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2025 |
| 325 | Spring Creek Farm And Oil, LLC | Bixby, OK 74008 | Oil Operator | Jun 2025 |
| 326 | Stepco Oil, Inc. | Ellinwood, KS 67526 | Oil Operator | Jan 2020 |
| 327 | Sterling Drillin | | Oil & Gas Operator | Mar 1992 |
| 328 | Sterling Drilling Company | Pratt, KS 67124 | Oil & Gas Operator | Apr 2014 |
| 329 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Dec 2025 |
| 330 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 331 | T G T Petroleum Corporation | Wichita, KS 67275 | Oil & Gas Operator | Dec 2025 |
| 332 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2026 |
| 333 | Te-Pe Oil & Gas | | Oil & Gas Operator | Dec 2025 |
| 334 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 335 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 336 | Thunderbird Drilling, Inc. | Wichita, KS 67207 | Oil Operator | Oct 2008 |
| 337 | Todd, Marc E | Wichita, KS 67203 | Oil Operator | Dec 2025 |
| 338 | Tomkat Limited | | Oil & Gas Operator | Jul 1995 |
| 339 | Tomkat, LTD. | Wichita, KS 67278 | Oil & Gas Operator | Oct 2009 |
| 340 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Feb 2026 |
| 341 | Trans-Western Operating Company | Golden, CO 80402 | Oil Operator | Nov 2025 |
| 342 | Transamerica Oil | | Oil & Gas Operator | Sep 1992 |
| 343 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 344 | Triple E Oil | Sterling, KS 67579 | Oil & Gas Operator | Mar 1999 |
| 345 | Troyer, Wayne A. | Galva, KS 67443 | Oil Operator | Jun 1997 |
| 346 | Twin Star Petrol | | Oil & Gas Operator | Jan 1989 |
| 347 | Union Pacific Re | | Oil & Gas Operator | Dec 1996 |
| 348 | United Energy, Inc. | Wichita, KS 67230 | Oil & Gas Operator | Dec 2002 |
| 349 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 350 | V. Francis Weigel Family Partnership LLC | Gorham, KS 67640 | Oil Operator | Dec 2025 |
| 351 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 352 | Vamco Operations | | Oil & Gas Operator | Dec 2025 |
| 353 | Venture Resources, Inc. | Denver, CO 80250 | Oil Operator | Dec 2025 |
| 354 | Vess Oil Corporation | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 355 | Victory Minerals LLC | Kansas City, MO 64141 | Oil Operator | Dec 2025 |
| 356 | Vin, Inc. | Sterling, KS 67579 | Oil Operator | Oct 2025 |
| 357 | Vincent Oil Corp | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 358 | Voigt O & G Comp | | Oil & Gas Operator | Nov 1993 |
| 359 | Webco Oil Company, Inc. | Hoisington, KS 67544 | Oil Operator | Dec 2025 |
| 360 | Wedel, Darold | Canton, KS 67428 | Oil Operator | Apr 2002 |
| 361 | Westech Energy C | | Oil & Gas Operator | Dec 1996 |
| 362 | White Eagle Resources Corp. | Taos, NM 87571 | Oil & Gas Operator | Jun 2016 |
| 363 | White Exploration Inc | Wichita, KS 67278 | Oil & Gas Operator | Dec 2025 |
| 364 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2025 |
| 365 | Winona Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 366 | Wirtz Oil, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Dec 2025 |
| 367 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 368 | Woco, Inc. | Wichita, KS 67214 | Oil Operator | Dec 2009 |
| 369 | Woodman & Iannit | | Oil & Gas Operator | Sep 1996 |
| 370 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Apr 2026 |
| 371 | Zu, LLC | Hays, KS 67601 | Oil Operator | Nov 2025 |