| 201 | Osborn Heirs Com | | Oil & Gas Operator | May 1995 |
| 202 | Osborn Oil & Gas | | Oil & Gas Operator | Jun 1991 |
| 203 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Nov 2025 |
| 204 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 205 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Sep 2025 |
| 206 | Partners In Crude, Inc. | Ponca City, OK 74602 | Oil & Gas Operator | Dec 1997 |
| 207 | Peak Energy LLC | Coffeyville, KS 67337 | Oil & Gas Operator | Sep 2025 |
| 208 | Pendulum Petrole | | Oil & Gas Operator | Dec 1995 |
| 209 | Pendulum Petroleum, Inc. | Pinedale, WY 82941 | Oil Operator | Aug 1999 |
| 210 | Perkins Oil Comp | | Oil Operator | Nov 1988 |
| 211 | Perkins Oil Ente | | Oil & Gas Operator | Dec 1995 |
| 212 | Perkins Oil Enterprises, Inc. | Howard, KS 67349 | Oil & Gas Operator | Sep 2025 |
| 213 | Petroleum Energy | | Oil & Gas Operator | Mar 1991 |
| 214 | Petroleum Enterp | | Oil & Gas Operator | Sep 1995 |
| 215 | Petroleum Enterprises, Inc. | Hutchinson, KS 67504 | Oil & Gas Operator | May 2001 |
| 216 | Petroleum Incorp | | Oil & Gas Operator | Apr 1993 |
| 217 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 218 | Petroleum Property Services, Inc. | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 219 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Sep 2025 |
| 220 | Phil Groves Oil | | Oil & Gas Operator | Sep 2025 |
| 221 | Phillips Lee Oil | | Oil & Gas Operator | Aug 1995 |
| 222 | Phillips Oil Properties Inc. | Derby, KS 67037 | Oil Operator | Sep 2025 |
| 223 | Phoenix Oil Corp | Wichita, KS 67201 | Oil & Gas Operator | Jan 1999 |
| 224 | Prairie Oil Inco | | Oil Operator | Jan 1986 |
| 225 | Pres-Lo Incorpor | | Oil & Gas Operator | Aug 1993 |
| 226 | Presley Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 227 | Provine, B.R. | Wichita, KS 67226 | Oil Operator | Apr 2010 |
| 228 | Pryor VIctor W Jr | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2017 |
| 229 | Pyramid Corporat | | Oil & Gas Operator | Aug 1995 |
| 230 | Pyramid Oil & Ga | | Oil & Gas Operator | Sep 1987 |
| 231 | Quail Oil & Gas LC | Garden City, KS 67846 | Oil & Gas Operator | Nov 2025 |
| 232 | Rader Oil Compan | | Oil Operator | May 1987 |
| 233 | Rahmco Oil & Gas | | Oil & Gas Operator | Nov 1992 |
| 234 | Rains & Williams | | Oil & Gas Operator | Nov 1995 |
| 235 | Ramoil Company | Winfield, KS 67156 | Oil & Gas Operator | May 1987 |
| 236 | Raney Oil Company, LLC | Lawrence, KS 66049 | Oil & Gas Operator | Sep 2025 |
| 237 | Range Oil Co., Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2020 |
| 238 | Range Oil Compan | | Oil & Gas Operator | Nov 1995 |
| 239 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Sep 2025 |
| 240 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | Dec 2025 |
| 241 | Remco Ener Corpo | | Oil & Gas Operator | Dec 1994 |
| 242 | Resource Venture | | Oil & Gas Operator | Oct 1991 |
| 243 | Rexoco Incorpora | | Oil Operator | Apr 1992 |
| 244 | Rhoads, Mark | Seminole, OK 74868 | Oil Operator | Sep 1999 |
| 245 | Richardson And Son , Inc. | Winfield, KS 67156 | Oil Operator | Sep 2025 |
| 246 | Roadrunner Energy Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 247 | Roark S L | | Oil & Gas Operator | Nov 1992 |
| 248 | Rockin 'A' Oil | | Oil Operator | Jul 2025 |
| 249 | Ronco Incorporat | | Oil Operator | Sep 1988 |
| 250 | Rush Oil & Gas C | | Oil Operator | Dec 1995 |
| 251 | S.C.Z. Oil Company | Cherryvale, KS 67335 | Gas Operator | Dec 2003 |
| 252 | Sage NR Ok LLC | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 253 | Sananco Energy C | | Oil Operator | Aug 1987 |
| 254 | School Creek Corporation | Winfield, KS 67156 | Oil Operator | Jan 2000 |
| 255 | Scott'S Production, LLC | Roxbury, KS 67476 | Oil Operator | Sep 2025 |
| 256 | Seeker, LLC | Newkirk, OK 74647 | Oil & Gas Operator | Nov 2019 |
| 257 | Seelig Oil Corpo | | Oil Operator | Apr 1985 |
| 258 | Sheffler Industries | Phoenix, AZ 85013 | Oil Operator | Aug 1999 |
| 259 | Short W D Oil Co | | Oil Operator | Mar 1996 |
| 260 | Shouse, Micheal C. | Liberty, MO 64068 | Oil & Gas Operator | Jan 1996 |
| 261 | Silver Creek Oil | Merkel, TX 79536 | Oil & Gas Operator | Aug 2003 |
| 262 | Silver Creek Oil & Gas, Inc. | Wichita, KS 67203 | Oil Operator | Dec 1997 |
| 263 | Smokey Valley Resources, Inc. | Geneseo, KS 67444 | Oil Operator | Nov 2008 |
| 264 | SNR Kansas Operating, LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2019 |
| 265 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 266 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 267 | Sram Oil Incorporated | Winfield, KS 67156 | Oil & Gas Operator | Aug 2005 |
| 268 | Stauter, Richard J. | Greeley, CO 80634 | Gas Operator | Apr 1996 |
| 269 | Stelbar Oil Corp | Wichita, KS 67206 | Oil & Gas Operator | Aug 1995 |
| 270 | Stelbar Oil Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Sep 2025 |
| 271 | Stixon Petroleum | | Oil Operator | Dec 1996 |
| 272 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Sep 2025 |
| 273 | Summer Sun Gas | | Gas Operator | Mar 1990 |
| 274 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Sep 2025 |
| 275 | T & R Oil Company, A General Partnership | Moline, KS 67353 | Oil Operator | Dec 2019 |
| 276 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Nov 2025 |
| 277 | T J D Oil Compan | | Oil Operator | Feb 1989 |
| 278 | Tallgrass Explor | | Oil Operator | Sep 1987 |
| 279 | Taos Resources Operating Co LLC | Houston, TX 77037 | Oil & Gas Operator | Dec 2019 |
| 280 | Taylor Oil Company | Edmond, OK 73034 | Oil & Gas Operator | Sep 2025 |
| 281 | Te-Pe Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 282 | Teichgraeber Oil, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Dec 2024 |
| 283 | Temple & Roark | | Oil & Gas Operator | Sep 1981 |
| 284 | Texaco Explorati | | Oil & Gas Operator | Dec 1996 |
| 285 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 286 | TGT Petroleum Co | | Oil & Gas Operator | Apr 1995 |
| 287 | The Pyramid Corporation, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2009 |
| 288 | The Trees Oil Company | Wichita, KS 67208 | Oil & Gas Operator | Nov 2014 |
| 289 | Three Bros. Energy, Inc. | Ponca City, OK 74601 | Gas Operator | Dec 2013 |
| 290 | Thresher Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Feb 2026 |
| 291 | Tomco Oil Incorp | | Oil Operator | Nov 1989 |
| 292 | Tomco Oil, Inc. | Atlanta, KS 67008 | Oil & Gas Operator | Sep 2025 |
| 293 | Toto Energy, LLC | Spring, TX 77380 | Oil & Gas Operator | Dec 2019 |
| 294 | TR Crude LLC | Independence, KS 67301 | Oil Operator | Aug 2024 |
| 295 | Trans Pacific Oil Corporation | Wichita, KS 67202 | Oil & Gas Operator | Dec 2025 |
| 296 | Trees Oil Compan | | Oil Operator | Jan 1995 |
| 297 | Triple G Oilfiel | | Oil & Gas Operator | Dec 1985 |
| 298 | Troy Jaco, Inc. | Sherman, TX 75091 | Oil Operator | Dec 2018 |
| 299 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 300 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Dec 2025 |