| 201 | Phillips Explora | | Oil & Gas Operator | Dec 1996 |
| 202 | Phillips Oil Properties Inc. | Derby, KS 67037 | Oil Operator | Dec 2025 |
| 203 | Pipeline Oil & Gas, LLC | Phoenix, AZ 85016 | Oil Operator | Feb 2014 |
| 204 | Postrock Midcontinent Production LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jan 2026 |
| 205 | Powell, Wayne D. & Barbara | Sedan, KS 67361 | Oil Operator | Sep 1996 |
| 206 | Prairie Methane Gas Producers LLC | Dewey, OK 74029 | Oil Operator | Dec 2009 |
| 207 | Production Team | | Oil & Gas Operator | Sep 1991 |
| 208 | Pure Energy Prod | | Oil Operator | Sep 1992 |
| 209 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 210 | Quest Energy Service Inc. | Chanute, KS 66720 | Oil & Gas Operator | Jan 2009 |
| 211 | Quito, Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Oct 2023 |
| 212 | Quivira Oil & Ex | | Oil Operator | Sep 1985 |
| 213 | R & D Call | Cedar Vale, KS 67024 | Oil Operator | Oct 2010 |
| 214 | R. D. Energy, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2025 |
| 215 | Ramoil Company | Winfield, KS 67156 | Oil & Gas Operator | May 1987 |
| 216 | Randy J Walker Oil Company | | Oil Operator | Sep 2025 |
| 217 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 218 | Range Oil Compan | | Oil & Gas Operator | Nov 1995 |
| 219 | Ratex Corporation | Cambridge, WI 53523 | Oil Operator | Jun 2011 |
| 220 | Reata Petroleum LLC | Independence, KS 67301 | Oil & Gas Operator | Dec 2025 |
| 221 | Red Buck Oil Company | Copan, OK 74022-0215 | Oil Operator | Nov 2009 |
| 222 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 223 | RFB Exploration | | Oil Operator | Feb 1981 |
| 224 | Rissman Lease Operating | Oklahoma City, OK 73116 | Oil Operator | Dec 1996 |
| 225 | Roberts, Randy | Sedan, KS 67361 | Oil & Gas Operator | Dec 2025 |
| 226 | Robinson, Beryl A. | Peru, KS 67360 | Oil & Gas Operator | Mar 2012 |
| 227 | Rock Petroleum, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 228 | Rodgers, Murray | Sedan, KS 67361 | Oil Operator | Oct 1996 |
| 229 | Rogers Oil Compa | | Oil Operator | Apr 1993 |
| 230 | S & J Operating | | Oil Operator | May 1989 |
| 231 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 232 | Salt Creek Resources, LLC | Caney, KS 67333 | Oil Operator | Oct 2019 |
| 233 | Sandhills Oil Co. | Copan, OK 74022 | Oil Operator | Aug 1997 |
| 234 | Sawdust Oil Comp | | Oil & Gas Operator | May 1987 |
| 235 | Sek Energy, LLC | Benedict, KS 66714 | Oil & Gas Operator | Dec 2025 |
| 236 | Seymour Oil Co Inc | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 237 | Shaffer Oil Leas | | Oil Operator | May 1993 |
| 238 | Sharp, Robert L. &/Or Cindy | | Oil Operator | Nov 2019 |
| 239 | Sheel Oil Compan | | Oil Operator | Jan 1985 |
| 240 | Sheri-Di Product | | Oil Operator | Apr 1994 |
| 241 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Feb 2026 |
| 242 | Siegfried R H In | | Oil Operator | Apr 1985 |
| 243 | SM Oil & Gas Inc | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2026 |
| 244 | Smith, Edward J. | Clifton, NJ 07013 | Oil & Gas Operator | Dec 1995 |
| 245 | Snedco, Inc. | Chickasha, OK 73023 | Oil Operator | Dec 2025 |
| 246 | Snyder, Jim Estate (Deceased) | Hamilton, KS 66853 | Oil Operator | Dec 2009 |
| 247 | Soles Larry - Fe | | Oil Operator | Nov 1986 |
| 248 | Soule, Richard A. | Eureka, KS 67045 | Oil Operator | Sep 2019 |
| 249 | Speedy Well Service | | Oil & Gas Operator | Dec 2025 |
| 250 | Steinberger Bros., Inc. | Independence, KS 67301 | Oil Operator | Dec 2009 |
| 251 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 252 | Sterling Oil & G | | Oil Operator | May 1984 |
| 253 | Stewart Oil Co. | | Oil Operator | Jun 2009 |
| 254 | Stewart Oil Comp | | Oil Operator | Jul 1993 |
| 255 | Stich Oil Company, A General Partnership | Chanute, KS 66720 | Oil Operator | Jul 2014 |
| 256 | Stixon Petroleum | | Oil Operator | Dec 1996 |
| 257 | STL Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2016 |
| 258 | Stonegate Ranch LLC | Caney, KS 67333 | Oil Operator | Dec 2025 |
| 259 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 260 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 261 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 262 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 263 | Tanner, M.B. | Moline, KS 67353 | Oil Operator | Apr 1986 |
| 264 | Tdot Oil, Inc. | Sedan, KS 67361 | Oil Operator | Dec 2025 |
| 265 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 266 | Thomas Garner, Inc. | St John, KS 67576 | Oil & Gas Operator | Dec 2025 |
| 267 | Thorne Harold & | | Oil Operator | May 1994 |
| 268 | Tomkat Limited | | Oil & Gas Operator | Jul 1995 |
| 269 | Triple G Oilfiel | | Oil & Gas Operator | Dec 1985 |
| 270 | Tyrok | | Oil & Gas Operator | Nov 2010 |
| 271 | U-N-I Exploratio | | Oil & Gas Operator | Dec 1990 |
| 272 | Uhls, Jimmie J. | Sedan, KS 67361 | Oil Operator | Sep 2019 |
| 273 | Unionville Explo | | Oil Operator | Jul 1984 |
| 274 | United States Exploration, Inc. | Denver, CO 80802 | Oil & Gas Operator | Apr 2007 |
| 275 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2024 |
| 276 | Unruh, Mark D. | Peru, KS 67360 | Oil Operator | Sep 2011 |
| 277 | Usx Operating Co., Inc. | Barnstall, OK 74002 | Oil & Gas Operator | Apr 2017 |
| 278 | Vanroyen Oil And Gas, L.L.C. | Wichita, KS 67217 | Oil Operator | Dec 2025 |
| 279 | Venture Oil Comp | | Oil Operator | Aug 1988 |
| 280 | Victory Minerals LLC | Kansas City, MO 64141 | Oil Operator | Dec 2025 |
| 281 | Wachtman-Schroed | | Oil Operator | Aug 1986 |
| 282 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 283 | Wells-Battelstei | | Oil & Gas Operator | Mar 1993 |
| 284 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 285 | Wil-Max Co. | Kingman, KS 67068 | Oil Operator | Jul 2001 |
| 286 | Wildcat Energy, Inc. | Sedan, KS 67361 | Oil Operator | Feb 2001 |
| 287 | Williams, Raymond H.(Deceased) | Sedan, KS 67361 | Oil Operator | Nov 2009 |
| 288 | Wilson Charles B | | Oil & Gas Operator | Dec 1996 |
| 289 | Witcraft, Jimmy D. | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 1987 |
| 290 | Wolfe Energy, LLC | | Oil Operator | Dec 2025 |
| 291 | Wolfe Jimmy Ray | | Oil Operator | Nov 1995 |
| 292 | Wolfe, Jimmy Ray, Deceased | Peru, KS 67360 | Oil Operator | Sep 2009 |
| 293 | Wolfe, Leslie | Peru, KS 67360 | Oil Operator | Dec 2014 |
| 294 | Wolfe, Ray | Longton, KS 67352 | Oil Operator | Jul 1988 |
| 295 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 296 | Yoder Oil Compan | | Oil Operator | Sep 1988 |
| 297 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Dec 2025 |