| 201 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 202 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 203 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 204 | Nash Oil & Gas, Inc. | Newton, KS 67114 | Oil & Gas Operator | Mar 2025 |
| 205 | National Coopera | | Oil & Gas Operator | Mar 1992 |
| 206 | National Oil Com | | Oil & Gas Operator | Oct 1992 |
| 207 | Ness Crude Oil I | | Oil Operator | Mar 1994 |
| 208 | New Age Oil LLC | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 209 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |
| 210 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Mar 2025 |
| 211 | Northern Lights | | Oil & Gas Operator | Apr 1993 |
| 212 | Northern Lights Oil Company, LLC | Andover, KS 67002 | Oil & Gas Operator | Mar 2025 |
| 213 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 214 | Okmar Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 215 | Opco LLC | Chase, KS 67524 | Oil Operator | Dec 2019 |
| 216 | Oryx Energy Comp | | Oil & Gas Operator | Apr 1991 |
| 217 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 218 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 219 | Palomino Petroleum | Newton, KS 67114 | Oil Operator | Oct 2003 |
| 220 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Mar 2025 |
| 221 | Parrish Corporation | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 222 | Pate-Dombaugh Pe | | Oil Operator | Sep 1991 |
| 223 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 224 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 225 | Pendleton Land & | | Oil Operator | Aug 1985 |
| 226 | Petex Incorporat | | Oil Operator | Sep 1991 |
| 227 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 228 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 229 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 230 | Petroleum Techno | | Oil & Gas Operator | Dec 1996 |
| 231 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Mar 2025 |
| 232 | Petropro Petroleum LLC | | Oil Operator | Mar 2025 |
| 233 | Petroventures In | | Oil Operator | Apr 1987 |
| 234 | Phillips Exploration Company L.C. | Andover, KS 67002 | Oil & Gas Operator | Mar 2025 |
| 235 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 236 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 237 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Mar 2025 |
| 238 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 239 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 240 | Plano Petroleum | | Oil & Gas Operator | Dec 1994 |
| 241 | Pride Energy Company, A General Partnership | Tulsa, OK 74170 | Oil & Gas Operator | Aug 2021 |
| 242 | Production Drilling, Inc. | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 243 | Quest Energy LLC | Salina, KS 67401 | Oil Operator | Feb 2025 |
| 244 | R. P. Nixon Operations, Inc | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 245 | Rains & Williams | | Oil & Gas Operator | Nov 1995 |
| 246 | Rains And Williamson Oil Co. | Wichita, KS 67277 | Oil & Gas Operator | Mar 2025 |
| 247 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 248 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Apr 2025 |
| 249 | Ramco Drilling S | | Oil & Gas Operator | Dec 1992 |
| 250 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Apr 2025 |
| 251 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Mar 2025 |
| 252 | Raymond Oil Comp | | Oil & Gas Operator | Dec 1996 |
| 253 | Reach Group-Reac | | Oil & Gas Operator | Apr 1995 |
| 254 | Reach Petroleum | | Oil & Gas Operator | Jan 1994 |
| 255 | Red Oak Energy, Inc. | Wichita, KS 67207 | Oil & Gas Operator | Mar 2025 |
| 256 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | May 2025 |
| 257 | Richard Oil Comp | | Oil Operator | Mar 1992 |
| 258 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Mar 2025 |
| 259 | Ritchie Explorat | | Oil & Gas Operator | Dec 1996 |
| 260 | Ritchie Exploration | | Oil Operator | Aug 1995 |
| 261 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Mar 2025 |
| 262 | Roark, Nancy | Winfield, KS 67156 | Oil Operator | Dec 2004 |
| 263 | Rockwood Petrole | | Oil Operator | Aug 1985 |
| 264 | Royal Energy, Inc. | Dodge City, KS 67801 | Oil Operator | Dec 2019 |
| 265 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Mar 2025 |
| 266 | Sabre Exploratio | | Oil Operator | Oct 1988 |
| 267 | Sabre Exploration, LLC | Wichita, KS 67205 | Oil Operator | Mar 2025 |
| 268 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 269 | Sam W Mays Jr LLC | Eureka, KS 67045 | Oil & Gas Operator | Apr 2018 |
| 270 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jul 2025 |
| 271 | Schaben Oil LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 272 | Schreiber Oil Co. | | Oil Operator | Dec 2009 |
| 273 | Schwien Tank & Lease Service Inc | Bazine, KS 67516 | Oil Operator | May 2000 |
| 274 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | May 2025 |
| 275 | Sharon Resources | | Oil Operator | Sep 1995 |
| 276 | Shaw Robert Lesl | | Oil Operator | Oct 1989 |
| 277 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 278 | Smith Oil Operations | | Oil & Gas Operator | Mar 2025 |
| 279 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 280 | Source Petroleum | Wichita, KS 67202 | Oil & Gas Operator | Oct 1993 |
| 281 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 282 | Spindletop Oil & | | Oil Operator | Jun 1993 |
| 283 | Stanlee Oil LLC | | Oil Operator | Mar 2025 |
| 284 | Stekoll Petroleu | | Oil Operator | Oct 1985 |
| 285 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Mar 2025 |
| 286 | Talon Group LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 287 | Texas Energies I | | Oil & Gas Operator | Aug 1994 |
| 288 | Thunderbird Dril | | Oil & Gas Operator | Nov 1995 |
| 289 | Thunderbird Drilling, Inc. | Wichita, KS 67207 | Oil Operator | Oct 2008 |
| 290 | Totten Resources | | Oil Operator | Sep 2007 |
| 291 | Trans Pacific Oi | | Oil & Gas Operator | May 1995 |
| 292 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | May 2025 |
| 293 | Trans Resource D | | Oil Operator | May 1991 |
| 294 | Trek Aec, LLC | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 295 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | Jul 2025 |
| 296 | Triple Crown Operating LLC | Tulsa, OK 74114 | Oil Operator | Mar 2025 |
| 297 | Ummel'S Tank Ser | | Oil Operator | Sep 1994 |
| 298 | United Petroleum Corporation | Edgwater, CO 80214 | Oil & Gas Operator | May 1996 |
| 299 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 300 | Val Energy, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |