| 201 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 202 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Mar 2026 |
| 203 | Endeavor Drilling, Inc. | Wagoner, OK 74467 | Oil Operator | Feb 2026 |
| 204 | Enerco Energy Corporation | Norman, OK 73069-6643 | Oil & Gas Operator | Apr 2020 |
| 205 | Enerfin Gathering-East LLC | Houston, TX 77077 | Oil & Gas Operator | Nov 2022 |
| 206 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 207 | Energy Environment Inc | Holdenville, OK 74848-0765 | Oil & Gas Operator | Jul 2016 |
| 208 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 209 | Enhanced Hydrocarbons Inc | Claremore, OK 74017 | Oil & Gas Operator | May 2013 |
| 210 | Enterprise Energy Exploration Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Mar 2026 |
| 211 | Enterprise Energy Prod Co Inc | Tulsa, OK 74133-6754 | Oil & Gas Operator | Mar 2015 |
| 212 | Enterprise Exploration Inc | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2020 |
| 213 | Epperson Dwight | Okemah, OK 74859 | Oil Operator | Jan 2013 |
| 214 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 215 | Eskridge Production Company | Tulsa, OK 74112-1428 | Oil Operator | Sep 2019 |
| 216 | Ewsc Inc | Kenosha, WI 53142-3775 | Oil & Gas Operator | Apr 2020 |
| 217 | Fairway Resources Operating III LLC | Houston, TX 77002-2728 | Oil & Gas Operator | Feb 2026 |
| 218 | Fears George E | | Oil & Gas Operator | Mar 2019 |
| 219 | Federal Energy Development Co. | Dallas, TX 75205 | Oil & Gas Operator | Mar 2011 |
| 220 | Firehouse Energy LLC | Morris, OK 74445 | Oil & Gas Operator | Mar 2024 |
| 221 | Flare Oil Inc | Rockport, TX 78382 | Oil & Gas Operator | Jun 2026 |
| 222 | Flint J A & Associates | Holdenville, OK 74848 | Oil & Gas Operator | Sep 2009 |
| 223 | Forest 1 Development Company | Denver, CO 80202-4966 | Oil & Gas Operator | Mar 2008 |
| 224 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Jun 2026 |
| 225 | Four Square Oil Company Inc | Kellyville, OK 74039 | Oil Operator | Mar 2011 |
| 226 | Freedom Operating Company LLC | Tulsa, OK 74136-6834 | Oil & Gas Operator | Mar 2026 |
| 227 | Fremen Walter E | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2026 |
| 228 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 229 | French R B Exploration Co | Wichita Falls, TX 76308 | Oil Operator | Dec 1991 |
| 230 | G & R Oil Co | St. John, KS 67576 | Oil Operator | Aug 2008 |
| 231 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | Mar 2026 |
| 232 | G R B Resources Inc | Tulsa, OK 74136-5108 | Oil & Gas Operator | Aug 2013 |
| 233 | Garms Oil Inc | Kingfisher, OK 73750-4207 | Oil & Gas Operator | Feb 2026 |
| 234 | Garvey Oil And Gas LLC | Kellyville, OK 74039-4428 | Oil & Gas Operator | Mar 2015 |
| 235 | Gaskins Glendell L | Slick, OK 74071 | Oil & Gas Operator | Mar 2026 |
| 236 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Feb 2026 |
| 237 | Gazalski Richard S Dba Ski Energy | Henryetta, OK 74437-1208 | Oil & Gas Operator | Dec 2020 |
| 238 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Feb 2026 |
| 239 | General Petroleum Corp | Sand Springs, OK 74063-6646 | Oil & Gas Operator | Jul 2015 |
| 240 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 241 | Genesis Petroleum Corporation | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 242 | Geo American Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 243 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 244 | Geological & Engineering Consultants | | Oil & Gas Operator | Mar 2026 |
| 245 | German Petroleum Company | Tulsa, OK 74169-1953 | Oil & Gas Operator | Oct 2009 |
| 246 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Mar 2026 |
| 247 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2026 |
| 248 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2026 |
| 249 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Mar 2026 |
| 250 | Golden Circle Production Co | Seminole, OK 74868 | Oil & Gas Operator | May 2002 |
| 251 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2026 |
| 252 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 253 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 254 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2026 |
| 255 | Grayhorse Operating Inc | Tulsa, OK 74103-4438 | Oil & Gas Operator | Mar 2026 |
| 256 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 257 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 258 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 259 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Mar 2026 |
| 260 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 261 | H L L Inc | Scottsdale, AZ 85251 | Oil & Gas Operator | Jan 2007 |
| 262 | H.L.S. Energy Co., Inc. | Uvalde, TX 78801 | Oil & Gas Operator | Aug 2003 |
| 263 | Haddox Johnny C | Okemah, OK 74859-0254 | Oil Operator | Apr 2020 |
| 264 | Halgas Inc | Tulsa, OK 74101-3012 | Oil & Gas Operator | May 2013 |
| 265 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 266 | Hamilton B J | Ada, OK 74820-9404 | Oil & Gas Operator | Sep 1999 |
| 267 | Hamilton K M Oil & Gas Co | Ada, OK 74820 | Oil Operator | Jan 2013 |
| 268 | Hampton Corporation (The) | Norman, OK 73069-5910 | Oil Operator | Jun 2016 |
| 269 | Hardin Productions | Okemah, OK 74859 | Oil & Gas Operator | Dec 2006 |
| 270 | Hardwick Oil Company | Sugar Land, TX 77478 | Oil & Gas Operator | Nov 2014 |
| 271 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 272 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 273 | Heath Jack A | Tulsa, OK 74132-2403 | Oil & Gas Operator | Jan 2013 |
| 274 | Heath Oil Co., Inc. | Washington, OK 73093-4702 | Oil & Gas Operator | Feb 2026 |
| 275 | Heaton Everill L | Exeter, CA 93221-2340 | Oil & Gas Operator | Sep 2014 |
| 276 | Henry Billy Or Connie | Okemah, OK 74859-6075 | Oil & Gas Operator | Jul 2021 |
| 277 | Henson Doyle | Okmulgee, OK 74447-4841 | Oil & Gas Operator | Jun 2020 |
| 278 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2026 |
| 279 | Herv Oil, LLC | Oklahoma City, OK 73116 | Oil Operator | Mar 2026 |
| 280 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 281 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Jun 2026 |
| 282 | Hill Oil Company Inc | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2026 |
| 283 | Himco Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Feb 2026 |
| 284 | Hinson Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Feb 2026 |
| 285 | Hinson Jr Bobbie L | Bristow, OK 74010 | Oil & Gas Operator | Jul 2020 |
| 286 | Hispanic Oil & Gas Energy, LLC | Houston, TX 77056 | Oil Operator | Jan 2026 |
| 287 | Holloway David A | Okmulgee, OK 74447-9191 | Oil & Gas Operator | Feb 2026 |
| 288 | Holman Kendall | Paden, OK 74860-7116 | Oil & Gas Operator | Mar 2026 |
| 289 | Holman Ray | Okemah, OK 74859-0029 | Gas Operator | May 2024 |
| 290 | Holman Robert W | Prague, OK 74864-9230 | Oil & Gas Operator | Jan 2019 |
| 291 | Home Petroleum Corp | Victoria, TX 77902 | Oil & Gas Operator | Jun 2026 |
| 292 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 293 | Horizon Resources Inc | Fort Worth, TX 76101-1978 | Oil & Gas Operator | Jul 2006 |
| 294 | Horn Eddie L Dba B & E Investments | Bristow, OK 74010 | Oil & Gas Operator | Mar 2026 |
| 295 | Horseshoe Oil Co | Cromwell, OK 74837 | Oil & Gas Operator | Dec 2021 |
| 296 | Howco Oil And Gas | Stroud, OK 74079-9604 | Oil & Gas Operator | Mar 2015 |
| 297 | Howell Bill J | Calvin, OK 74531-0248 | Oil & Gas Operator | Sep 2016 |
| 298 | Huck Farms LLC | Stratford, OK 74872 | Oil & Gas Operator | Mar 2026 |
| 299 | Hull Enterprises Inc | Broken Arrow, OK 74012 | Oil & Gas Operator | Sep 2023 |
| 300 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |