| 201 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Jun 2025 |
| 202 | L & B Oil | Longton, KS 67352 | Oil Operator | Dec 2019 |
| 203 | L. D. Drilling, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jun 2025 |
| 204 | Lackey Disposal | | Oil Operator | Jul 1994 |
| 205 | Lackey Milton | | Oil & Gas Operator | Feb 1995 |
| 206 | Lackey, Donna | Waxahachie, TX 75165 | Oil Operator | Oct 2019 |
| 207 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 208 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | May 2025 |
| 209 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 210 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 211 | Lasmo Energy Cor | | Oil Operator | Feb 1990 |
| 212 | Lassetter Petrol | | Oil Operator | Oct 1986 |
| 213 | Lasso Energy LLC | Chase, KS 67524 | Oil & Gas Operator | Jun 2025 |
| 214 | Law Production, Inc. | McPherson, KS 67460 | Oil Operator | Nov 2007 |
| 215 | Leben Drilling I | | Oil & Gas Operator | Dec 1988 |
| 216 | Lebsack Oil Prod | | Oil & Gas Operator | Nov 1995 |
| 217 | Lebsack Oil Production Inc. | Stafford, KS 67578 | Oil & Gas Operator | Jun 2025 |
| 218 | Leeman Energy Co | | Oil & Gas Operator | Jan 1987 |
| 219 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 220 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 221 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Jun 2025 |
| 222 | Lutz, Scott T. Trust | Fayetteville, AR 72702 | Oil Operator | Mar 2011 |
| 223 | M & D Oil And Gas, LLC | Sterling, KS 67579 | Oil Operator | Jun 2025 |
| 224 | M D B Operations | | Oil Operator | Dec 1988 |
| 225 | Mad Operators LLC | | Oil & Gas Operator | Jun 2025 |
| 226 | Mai Oil Operations, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Jun 2025 |
| 227 | Malone Oil Co. | | Oil & Gas Operator | Jul 2006 |
| 228 | Malone Oil Compa | | Oil Operator | Dec 1994 |
| 229 | Manning, Gregory | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 230 | Manta Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jun 2020 |
| 231 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 232 | Mar-Lou Oil Co., LLC | Wilson, KS 67490 | Oil Operator | Jun 2025 |
| 233 | Marjo Incorporat | | Oil & Gas Operator | Jun 1990 |
| 234 | Marker Oil Compa | | Oil Operator | Jul 1985 |
| 235 | Martin Oil Producers, Inc. | Garland, TX 75046 | Oil & Gas Operator | Aug 2013 |
| 236 | Maxie D, Inc. | Laguna Niguel, CA 92677 | Gas Operator | Feb 1998 |
| 237 | Melland Drilling | | Oil Operator | Nov 1992 |
| 238 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 239 | Mid Kansas Explo | | Oil Operator | Apr 1994 |
| 240 | Mid Kansas Gas Gathering | | Gas Operator | Jun 2025 |
| 241 | Mid-American Hyd | | Oil & Gas Operator | Jan 1992 |
| 242 | Midway Drilling | | Oil & Gas Operator | Dec 1996 |
| 243 | Midway Operating Co. | Great Bend, KS 67530 | Oil Operator | Jan 1998 |
| 244 | Mike Kelso Oil, Inc. | Chase, KS 67524 | Oil & Gas Operator | Jun 2025 |
| 245 | Miller I O Incor | | Oil & Gas Operator | Apr 1991 |
| 246 | Morgenstern Oil Operations LLC | Ellinwood, KS 67526 | Oil Operator | Jun 2025 |
| 247 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 248 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Feb 2025 |
| 249 | MW Oil, Inc | | Oil & Gas Operator | Jun 2025 |
| 250 | N-B Company Inco | | Oil & Gas Operator | Apr 1992 |
| 251 | National Cooperative Refinery Assoc. | Great Bend, KS 67530 | Oil & Gas Operator | Feb 2023 |
| 252 | National Develop | | Oil & Gas Operator | Jan 1990 |
| 253 | Nichols Oil Corp. | Holcomb, KS 67846 | Oil Operator | Dec 1994 |
| 254 | Norstar Petroleum Inc | Englewood, CO 80112 | Oil & Gas Operator | Jun 2025 |
| 255 | North American D | | Oil & Gas Operator | Sep 1986 |
| 256 | North American Drilling & Exploration, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Aug 2015 |
| 257 | Northstar Investments, Inc. | Wichita, KS 67230 | Oil & Gas Operator | Jun 2025 |
| 258 | Ocfiw Oil Company, Inc. | Hartington, NE 68739 | Oil & Gas Operator | Dec 2009 |
| 259 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 260 | Oil Production S | | Oil Operator | Sep 1993 |
| 261 | Oil Property Man | | Oil & Gas Operator | Jun 1995 |
| 262 | Oil Property Management Inc | Attica, KS 67009 | Oil & Gas Operator | Feb 2021 |
| 263 | Oil-Tech Prod Co | | Oil & Gas Operator | Oct 1992 |
| 264 | Osborn Energy, LLC | Bucyrus, KS 66013 | Oil & Gas Operator | Jul 2017 |
| 265 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 266 | Palomino Petroleum Inc | Newton, KS 67114 | Oil & Gas Operator | Jun 2025 |
| 267 | Patterson Energy LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 268 | Pauley Oil | | Oil Operator | Jun 2025 |
| 269 | Perry Petroleum | | Oil Operator | Jun 1993 |
| 270 | Petro Oil Produc | | Oil Operator | Aug 1989 |
| 271 | Petro Pak Corpor | | Oil Operator | Aug 1988 |
| 272 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 273 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 274 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 275 | Petx Petroleum C | | Oil Operator | Nov 1993 |
| 276 | Phillips Petrole | | Oil & Gas Operator | May 1995 |
| 277 | Pintail Petroleu | | Oil & Gas Operator | Dec 1995 |
| 278 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 279 | Pioneer Operatio | | Oil & Gas Operator | Mar 1986 |
| 280 | Pratt Well Service, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Jun 2025 |
| 281 | Premier Oil & Exploration Inc | Hutchinson, KS 67502 | Oil & Gas Operator | Jun 2025 |
| 282 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 283 | Prospect Oil & Gas Corp | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 284 | Quality Well Service, Inc. | Pratt, KS 67124 | Oil Operator | Feb 2006 |
| 285 | R J Operating Company | Albany, TX 76430 | Oil & Gas Operator | Jun 2025 |
| 286 | R. J. Oil Co. | Olney, TX 76374 | Oil & Gas Operator | May 2025 |
| 287 | Rama Operating C | | Oil & Gas Operator | Dec 1996 |
| 288 | Rama Operating Company Inc | Stafford, KS 67578 | Oil & Gas Operator | Aug 2025 |
| 289 | Randon Production Co. | Marion, KS 66861 | Oil & Gas Operator | Jun 2025 |
| 290 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 291 | Range Oil Compan | | Oil & Gas Operator | Nov 1995 |
| 292 | Ratzlaff, Steven | Galva, KS 67443 | Oil Operator | Dec 1996 |
| 293 | Raymond Oil Co., Inc. | Wichita, KS 67201 | Oil & Gas Operator | Jun 2025 |
| 294 | Raymond Oil Comp | | Oil & Gas Operator | Dec 1996 |
| 295 | Red Hills Energy, LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2025 |
| 296 | Reh Oil And Gas, LLC. | Pratt, KS 67124 | Oil & Gas Operator | Apr 2019 |
| 297 | Reif Oil Operati | | Oil Operator | Nov 1988 |
| 298 | Resource Operations Inc | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 299 | Rexoco Incorpora | | Oil Operator | Apr 1992 |
| 300 | Richlan Drilling, A General Partnership | Beaver, KS 67525 | Oil & Gas Operator | Jun 2025 |