| 201 | Kelley James C Estate | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 202 | Kentry Oil Company | Kingston, OK 73439 | Oil Operator | Aug 2002 |
| 203 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 204 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 205 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 206 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 207 | Kerr-McGee Refining Corp | Oklahoma City, OK 73125 | Oil & Gas Operator | Jun 2007 |
| 208 | Kidd Oil & Gas, LC | Dallas, TX 75219 | Oil & Gas Operator | Apr 1999 |
| 209 | Kim Ray Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Aug 2025 |
| 210 | Kimco Oil And Gas | Wewoka, OK 74884-0613 | Oil & Gas Operator | Jul 2016 |
| 211 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2025 |
| 212 | Kingman Petroleum Inc | Dolores, CO 81323-9503 | Oil & Gas Operator | Oct 2025 |
| 213 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Oct 2025 |
| 214 | Koch Hydrocarbon Company | Wichita, KS 67220-3203 | Oil & Gas Operator | Nov 2014 |
| 215 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 216 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 217 | Lackey Raymond R | Lindsay, OK 73052 | Oil & Gas Operator | Jun 2015 |
| 218 | Lackey Raymond R & Assoc | Sulphur, OK 73086 | Oil & Gas Operator | Oct 2025 |
| 219 | Lakewood Oil Company LLC | Mission Hills, KS 66208-2735 | Oil & Gas Operator | May 2013 |
| 220 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 221 | Larkin Energy Company Inc | Sasakwa, OK 74867 | Oil & Gas Operator | May 2022 |
| 222 | Larkin Oil Co | Sasakwa, OK 74867 | Oil & Gas Operator | Aug 2015 |
| 223 | Larson Exploration Company | Tulsa, OK 74136-4939 | Oil & Gas Operator | Jul 2016 |
| 224 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 225 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 226 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 227 | Lincoln Rock Corporation | Northfield, IL 60093 | Oil & Gas Operator | Jul 2003 |
| 228 | Lion Petroleum Company | Oklahoma City, OK 73120-4503 | Oil & Gas Operator | Aug 2015 |
| 229 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 230 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 231 | M E Booth Corporation | Ada, OK 74820 | Oil Operator | Aug 2025 |
| 232 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | Oct 2025 |
| 233 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |
| 234 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 235 | Magaw & Zimmer | Perry, OK 73077-1055 | Oil & Gas Operator | Aug 2013 |
| 236 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 237 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73105 | Oil & Gas Operator | Sep 2025 |
| 238 | Marler Philip | Purcell, OK 73080-1522 | Oil & Gas Operator | Nov 2016 |
| 239 | Marsh Lonnie C | Konawa, OK 74849 | Oil & Gas Operator | Aug 2025 |
| 240 | Marsh Oil & Gas Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2025 |
| 241 | Martin Family Living Revocable Trust | Konawa, OK 74849-2221 | Oil Operator | Jul 2025 |
| 242 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 243 | Massad George H Estate | Holdenville, OK 74848 | Oil & Gas Operator | Dec 2014 |
| 244 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 245 | Massad Oil Company | Holdenville, OK 74848-2629 | Oil Operator | Sep 2025 |
| 246 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 247 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Oct 2025 |
| 248 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Oct 2025 |
| 249 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 250 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Sep 2025 |
| 251 | Moabb Oil Corp | | Oil & Gas Operator | Apr 1998 |
| 252 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Oct 2025 |
| 253 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 254 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Feb 2025 |
| 255 | Murphy Jack L | Tulsa, OK 74104-4915 | Oil Operator | Mar 2015 |
| 256 | National Cooperative RFG Assoc | McPherson, KS 67460-1404 | Oil & Gas Operator | Oct 2025 |
| 257 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 258 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 259 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Dec 2025 |
| 260 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Oct 2025 |
| 261 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Jul 2024 |
| 262 | North American Operating, LLC | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2025 |
| 263 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 264 | O G & E | Oklahoma City, OK 73124 | Oil & Gas Operator | Feb 2014 |
| 265 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |
| 266 | Oak Hills Energy Inc | Holdenville, OK 74848-0470 | Oil & Gas Operator | Sep 2014 |
| 267 | Oil & Gas Unlimited Inc | | Oil & Gas Operator | May 2013 |
| 268 | Oil Center Operating Inc | Fort Worth, TX 76102-5108 | Oil & Gas Operator | Apr 2014 |
| 269 | Oklahoma Basic Economy Corp | Houston, TX 77002-6003 | Oil & Gas Operator | Apr 2020 |
| 270 | Oklahoma Liquid Resources Inc | Collinsville, OK 74021 | Oil & Gas Operator | Aug 2025 |
| 271 | Oklahoma Oil & Gas MGMT Inc | Edmond, OK 73083-6786 | Oil & Gas Operator | Sep 2025 |
| 272 | Oklahoma Prime Energy LLC | Ardmore, OK 73401 | Oil Operator | May 2020 |
| 273 | Owl Creek Production Co., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2006 |
| 274 | Oxley Petroleum | Tulsa, OK 74119-3609 | Oil & Gas Operator | Jan 2020 |
| 275 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 276 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 277 | Paluca Petroleum Inc | Holdenville, OK 74848 | Oil & Gas Operator | Oct 2025 |
| 278 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2025 |
| 279 | Parker Shirley M | Tulsa, OK 74136 | Oil Operator | Jun 2013 |
| 280 | Parkinsol Oil Company | Seminole, OK 74868-1648 | Oil & Gas Operator | Oct 2014 |
| 281 | Parks Bill M | Seminole, OK 74818-1648 | Oil & Gas Operator | Apr 2014 |
| 282 | Passmore Robert W | Ada, OK 74820-5501 | Oil & Gas Operator | May 2022 |
| 283 | Patco Investments Inc | Seminole, OK 74868 | Oil Operator | Nov 2007 |
| 284 | Patrick Petroleum Co. | Jackson, MI 49201 | Oil & Gas Operator | Nov 1993 |
| 285 | Patterson George E | Ada, OK 74820-1108 | Oil & Gas Operator | Jul 2016 |
| 286 | PCL Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Oct 2025 |
| 287 | Pedco Inc | | Oil & Gas Operator | Nov 1997 |
| 288 | Pegg Oil LLC | Allen, OK 74825-4900 | Oil Operator | Aug 2022 |
| 289 | Penner Energy Inc | Oklahoma City, OK 73120-1930 | Oil & Gas Operator | Oct 2025 |
| 290 | Petro Davis Inc | Oklahoma City, OK 73142-1807 | Oil & Gas Operator | Jan 2013 |
| 291 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | Aug 2025 |
| 292 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 293 | Petroquest Oil & Gas LLC | Wewoka, OK 74884 | Oil & Gas Operator | Oct 2025 |
| 294 | Phase III Drilling Inc | Wetumka, OK 74883-0333 | Oil & Gas Operator | Sep 2025 |
| 295 | Pheldon Oil Production Inc | Asher, OK 74826-2629 | Oil & Gas Operator | Dec 2024 |
| 296 | Philpot Operating Company Inc | Ada, OK 74820-4457 | Oil & Gas Operator | May 2013 |
| 297 | Phoenix Oil & Gas Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2025 |
| 298 | Pogue Randall | Ada, OK 74821-1547 | Oil & Gas Operator | Apr 2014 |
| 299 | Pontotoc Operations Inc | Dallas, TX 75225-1425 | Oil & Gas Operator | Jun 2017 |
| 300 | Positive Energy LLC | Ada, OK 74820 | Oil & Gas Operator | Sep 2025 |