| 201 | Marmac Petroleum Company | Denver, CO 80222 | Oil Operator | Apr 1998 |
| 202 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 203 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 204 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Mar 2025 |
| 205 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 206 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Jul 2025 |
| 207 | Mid-Continent Re | | Oil & Gas Operator | Jan 1993 |
| 208 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 209 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 210 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Mar 2025 |
| 211 | Miller-Becker Enterprises, LLC | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 212 | Miway Operations | Russell, KS 67665 | Oil Operator | Aug 1994 |
| 213 | MJT Oil | | Oil Operator | Mar 2025 |
| 214 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 215 | Mobil Oil Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2016 |
| 216 | Morris & Morris | | Oil Operator | Sep 1995 |
| 217 | Morris Oil Operations | | Oil Operator | Mar 2025 |
| 218 | Murchison Oil & | | Oil Operator | Mar 1988 |
| 219 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 220 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 221 | MVRC Partnership | Russell, KS 67655 | Oil Operator | Jan 1992 |
| 222 | N-B Company Inco | | Oil & Gas Operator | Apr 1992 |
| 223 | N.F. Producers, Inc. | Berthoud, CO 80513 | Oil Operator | Mar 2025 |
| 224 | National Coopera | | Oil & Gas Operator | Mar 1992 |
| 225 | New Age Oil LLC | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 226 | New Generation Oil Inc | Russell, KS 67665 | Oil Operator | Feb 2002 |
| 227 | New London Oil I | | Oil Operator | Dec 1996 |
| 228 | Nixon R P Operat | | Oil Operator | Aug 1995 |
| 229 | Noir-Blanc | Russell, KS 67665 | Oil Operator | May 1992 |
| 230 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Mar 2025 |
| 231 | Northstar Investments, Inc. | Wichita, KS 67230 | Oil & Gas Operator | Mar 2025 |
| 232 | NRD - Rein Resources, A General Partnership | Union, KY 41091 | Oil Operator | Mar 2025 |
| 233 | O'Hare Energy Co | | Oil Operator | Dec 1983 |
| 234 | Ogh Oil Company | | Oil Operator | Sep 1995 |
| 235 | Okmar Oil Compan | | Oil & Gas Operator | Feb 1995 |
| 236 | Opdycke Lease Partners, A General Partnership | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 237 | Owen'S Pumping Service | | Oil Operator | Mar 2025 |
| 238 | Oxy USA | | Oil Operator | Apr 1992 |
| 239 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 240 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 241 | Palomino Petrole | | Oil & Gas Operator | Dec 1995 |
| 242 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Mar 2025 |
| 243 | Partners Petrole | | Oil Operator | Oct 1992 |
| 244 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 245 | Peak Operating LLC | Oklahoma City, OK 73157 | Oil & Gas Operator | Mar 2025 |
| 246 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 247 | Petroleum Manage | | Oil & Gas Operator | Oct 1994 |
| 248 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Mar 2025 |
| 249 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 250 | Pioneer Operatio | | Oil & Gas Operator | Mar 1986 |
| 251 | Pioneer Operations, LLC | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 252 | Popp Operating, Inc. | Hoisington, KS 67544 | Oil Operator | Mar 2025 |
| 253 | Prater Oil & Gas Operations, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Mar 2025 |
| 254 | Pratt Well Servi | | Oil & Gas Operator | Jul 1996 |
| 255 | Pro3 Sulfur Solutions, Inc. | Russell, KS 67665 | Oil Operator | Jan 2025 |
| 256 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 257 | Prospect Oil & G | | Oil Operator | Feb 1996 |
| 258 | Prospect Oil & Gas Corp | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 259 | Quail Oil & Gas LC | Garden City, KS 67846 | Oil & Gas Operator | May 2025 |
| 260 | Quest Energy LLC | Salina, KS 67401 | Oil Operator | Feb 2025 |
| 261 | R&D Enterprises- | | Oil Operator | Dec 1988 |
| 262 | R. P. Nixon Operations, Inc | Hays, KS 67601 | Oil Operator | Mar 2025 |
| 263 | Rains & Williams | | Oil & Gas Operator | Nov 1995 |
| 264 | Rains And Williamson Oil Co. | Wichita, KS 67277 | Oil & Gas Operator | Mar 2025 |
| 265 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Apr 2025 |
| 266 | Rapid Well Servi | | Oil Operator | Feb 1995 |
| 267 | Recovery Resourc | | Oil Operator | Dec 1986 |
| 268 | Reddig Enterprises Inc. | Gorham, KS 67640 | Oil Operator | Mar 2025 |
| 269 | Reif Oil Operati | | Oil Operator | Nov 1988 |
| 270 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Mar 2025 |
| 271 | Ritchie Exploration, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Mar 2025 |
| 272 | Ritchie, A. Scott | Wichita, KS 67202 | Oil Operator | Mar 1988 |
| 273 | RJM Company | Claflin, KS 67525 | Oil & Gas Operator | Mar 2025 |
| 274 | Roberts Resources, Inc. | Wichita, KS 67275 | Oil & Gas Operator | Mar 2025 |
| 275 | Rosel Energy, Inc. | Liberal, KS 67901 | Oil & Gas Operator | Jul 2004 |
| 276 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 277 | Russco Energy In | | Oil Operator | Jun 1994 |
| 278 | Russco Energy, Inc. | Gladstone, MO 64118 | Oil Operator | Apr 2002 |
| 279 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Mar 2025 |
| 280 | S. R. Weilert Oil LLC | Wichita, KS 67208 | Oil Operator | Nov 2005 |
| 281 | Saco Oil Company | El Dorado, KS 67042 | Oil Operator | Jan 2001 |
| 282 | Samco Investments | | Oil Operator | Feb 2025 |
| 283 | Samson Resources | | Oil Operator | Jan 1994 |
| 284 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 285 | Scheck Oil Operation | | Oil & Gas Operator | Mar 2025 |
| 286 | Schlobohm Starr | | Oil Operator | Dec 1996 |
| 287 | Schlobohm, Starr F. | Wolfeboro, NH 03894 | Oil Operator | Jul 2004 |
| 288 | Schreiber Oil Co. | | Oil Operator | Dec 2009 |
| 289 | Schulte Oil | Garnett, KS 66032 | Oil Operator | Mar 2022 |
| 290 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Jul 2025 |
| 291 | Shelley, Randall D. | Wichita, KS 67202 | Oil Operator | Mar 2025 |
| 292 | Shields Oil Prod | | Oil & Gas Operator | Aug 1995 |
| 293 | Shields Oil Producers Inc. | Russell, KS 67665 | Oil Operator | Mar 2025 |
| 294 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 295 | Sloan Operations | | Oil Operator | Mar 2025 |
| 296 | Smith Oil Operations | | Oil & Gas Operator | Mar 2025 |
| 297 | Smith Richard F | | Oil Operator | Jun 1995 |
| 298 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 299 | Spivey, William | Hays, KS 67601 | Oil Operator | Jun 1993 |
| 300 | Standlee, Jacci L | Ellinwood, KS 67526 | Oil Operator | Feb 2025 |