| 201 | Finlay Energy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 1999 |
| 202 | Flusche Herbert J | Wichita Falls, TX 76309 | Oil Operator | Jun 1997 |
| 203 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 204 | Foreman Enterprises Inc | Edmond, OK 73003 | Oil & Gas Operator | Oct 2025 |
| 205 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 206 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Jun 2026 |
| 207 | Four-O-One Corporation | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2015 |
| 208 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 209 | Friedel Petroleum Corp Inc | Piedmont, OK 73078 | Gas Operator | Feb 2026 |
| 210 | Fugo Services Inc | McAlester, OK 74502-1429 | Oil & Gas Operator | Feb 1999 |
| 211 | Fuksa Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2026 |
| 212 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 213 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Feb 2026 |
| 214 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Feb 2026 |
| 215 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Feb 2026 |
| 216 | Geo Exploration LLC | Oklahoma City, OK 73120-7116 | Oil & Gas Operator | Jun 2024 |
| 217 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 218 | Geodyne Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 219 | Gerwan Oil Company | Oklahoma City, OK 73159 | Oil Operator | Mar 2011 |
| 220 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 221 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2026 |
| 222 | Gladiator Operating LLC | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2026 |
| 223 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2026 |
| 224 | Global Natural Res Corp | Houston, TX 77210 | Oil & Gas Operator | Dec 1994 |
| 225 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2026 |
| 226 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2026 |
| 227 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Mar 2026 |
| 228 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 229 | Grayhorse Operating Inc | Tulsa, OK 74103-4438 | Oil & Gas Operator | Mar 2026 |
| 230 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Mar 2026 |
| 231 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jun 2016 |
| 232 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 233 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2026 |
| 234 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 235 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 236 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2026 |
| 237 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 238 | Hadson Petro USA Inc | | Oil & Gas Operator | Nov 2016 |
| 239 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Feb 2026 |
| 240 | Harbert Energy Corp | Irving, TX 75015-2510 | Oil & Gas Operator | Feb 1993 |
| 241 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 242 | Harrod Leasing | Edmond, OK 73034 | Oil & Gas Operator | Mar 2026 |
| 243 | Hatley Delbert Jr Dba DH Enterprises | Oklahoma City, OK 73129 | Oil & Gas Operator | Feb 2026 |
| 244 | Hazelwood Prod & Exp Co LLC | Oklahoma City, OK 73116-9037 | Oil & Gas Operator | Feb 2026 |
| 245 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 246 | Heartland Exploration Inc | Edmond, OK 73013 | Oil & Gas Operator | Dec 2015 |
| 247 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2026 |
| 248 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Jun 2026 |
| 249 | High Energy | Cushing, OK 74023 | Oil & Gas Operator | Feb 2026 |
| 250 | Highland Minerals Inc | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 251 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 252 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Mar 2026 |
| 253 | Hoke Jr J T | Edmond, OK 73034 | Oil Operator | Nov 1998 |
| 254 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 255 | Hollrah Exploration Company | Edmond, OK 73012 | Oil & Gas Operator | Feb 2026 |
| 256 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 257 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 258 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | Mar 2026 |
| 259 | Hsumy Oil & Gas, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 260 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Mar 2026 |
| 261 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 262 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 263 | Hunton Oil & Gas Corporation | Oklahoma City, OK 73154-0191 | Oil & Gas Operator | May 2019 |
| 264 | Hunton Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2026 |
| 265 | Hurley Charles B | Santa Ana, CA 92706 | Oil & Gas Operator | Apr 2015 |
| 266 | I C Gas Amcana Inc | Tulsa, OK 74103-3713 | Oil & Gas Operator | Apr 1996 |
| 267 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Feb 2026 |
| 268 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 269 | Intergy Production LLC | Edmond, OK 73083 | Oil & Gas Operator | Mar 2026 |
| 270 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Mar 2026 |
| 271 | J & J Production Company LLC | Okemah, OK 74859 | Oil & Gas Operator | Mar 2026 |
| 272 | J&K Fine Energy LLC | Bethany, OK 73008 | Oil & Gas Operator | Feb 2026 |
| 273 | Jac-Mac Energy Corporation | Oklahoma City, OK 73170 | Oil & Gas Operator | Jan 2026 |
| 274 | Jackson Petroleum Consult Inc | Dallas, TX 75287 | Oil & Gas Operator | Aug 1994 |
| 275 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Jun 2026 |
| 276 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 277 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Mar 2026 |
| 278 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 279 | JB Petroleum Corporation | Purcell, OK 73080-6954 | Oil & Gas Operator | Sep 2018 |
| 280 | Jerry Sanner Oil Properties Inc | Enid, OK 73701 | Oil & Gas Operator | Mar 2026 |
| 281 | JHS Energy, Inc | Denver, CO 80222 | Oil & Gas Operator | Feb 2026 |
| 282 | Johnson June | Lawton, OK 73501-9624 | Oil & Gas Operator | Mar 2025 |
| 283 | Jojon Petroleum Company | Dallas, TX 75219 | Oil & Gas Operator | Feb 2026 |
| 284 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 285 | Jrhop Inc | Norman, OK 73072-4615 | Oil & Gas Operator | Dec 2015 |
| 286 | K S & S Oil Company Inc | Terral, TX 73569-5056 | Oil Operator | Mar 2026 |
| 287 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Mar 2026 |
| 288 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Mar 2026 |
| 289 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2026 |
| 290 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 291 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 292 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Jun 2026 |
| 293 | Key Energy Services Inc | Midland, TX 79705-5540 | Oil Operator | Jan 2008 |
| 294 | Kibtec Oil & Gas Inc | Cashion, OK 73016 | Oil & Gas Operator | Aug 2024 |
| 295 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2026 |
| 296 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Mar 2026 |
| 297 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 298 | Kolibri Energy Us, Inc. | Thousand Oaks, CA 91320-1272 | Oil & Gas Operator | Mar 2026 |
| 299 | KR Oil & Gas LLC | Seminole, OK 74868 | Oil Operator | Feb 2026 |
| 300 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |