| 201 | Oex-1 LLC | Tulsa, OK 74105-5153 | Oil & Gas Operator | Dec 2023 |
| 202 | Oklahoma Liquid Resources Inc | Owasso, OK 74055-0841 | Oil & Gas Operator | Jan 2024 |
| 203 | Oklahoma Petroleum Allies LLC | Ardmore, OK 73401 | Oil Operator | Oct 2023 |
| 204 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jan 2024 |
| 205 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 206 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 207 | Panther Energy Company, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2022 |
| 208 | Paramount Petroleum Corp | Dallas, TX 75374 | Oil Operator | Dec 2000 |
| 209 | Pathfinder Exploration LLC | Norman, OK 73069-8516 | Gas Operator | Nov 2008 |
| 210 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 211 | Patina Oklahoma Corp | Duncan, OK 73533-9523 | Oil & Gas Operator | Nov 2014 |
| 212 | Payne Exploration Company | Crescent, OK 73028-0502 | Oil & Gas Operator | Jan 2024 |
| 213 | Payne W C Family Trust | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Mar 2015 |
| 214 | Payrock Energy LLC | | Oil & Gas Operator | Feb 2023 |
| 215 | PBT Enterprises Inc | Garber, OK 73738-0262 | Oil & Gas Operator | May 2023 |
| 216 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Feb 2024 |
| 217 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2018 |
| 218 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 219 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 220 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 221 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 222 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | Apr 2024 |
| 223 | Pettit Charles Oil Company | Okmulgee, OK 74447-4226 | Oil & Gas Operator | Sep 2018 |
| 224 | Pollard Jr G W | Okmulgee, OK 74447 | Oil & Gas Operator | Apr 2015 |
| 225 | Porter Oil And Gas Inc | Fort Smith, AR 72903-6906 | Oil & Gas Operator | Jan 2024 |
| 226 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Jan 2024 |
| 227 | Pure Energy Systems Inc | Olive Branch, MS 38654-9041 | Gas Operator | Jan 2024 |
| 228 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2024 |
| 229 | Questar Energy Trading | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2020 |
| 230 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 231 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 232 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 233 | Ray'S Oil Company | Boynton, OK 74422 | Oil & Gas Operator | Jan 2024 |
| 234 | Red Dirt Environmental Services LLC | | Gas Operator | Jan 2024 |
| 235 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 236 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 237 | Regal Petroleum Services, Inc. | Euless, TX 76039-1127 | Oil & Gas Operator | May 2015 |
| 238 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 239 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 240 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | Jan 2024 |
| 241 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 242 | Robson Petroleum Company | Tulsa, OK 74104 | Oil & Gas Operator | Jan 1995 |
| 243 | Robson Resources Inc | Tulsa, OK 74104 | Oil & Gas Operator | May 1998 |
| 244 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Jan 2024 |
| 245 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 246 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 247 | Roye Realty & Developing Inc | Stigler, OK 74462-0148 | Gas Operator | Dec 2004 |
| 248 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 249 | Salt Creek Energy Company LLC | Shawnee, OK 74802-1505 | Oil & Gas Operator | Jan 2024 |
| 250 | Salty Dog Disposal LLC | | Oil Operator | Mar 2024 |
| 251 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 252 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 253 | Sand Point LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2020 |
| 254 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Jan 2024 |
| 255 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2024 |
| 256 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 257 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 258 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 259 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 260 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 261 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 262 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 263 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 264 | Six "E" Trading Company | Allen, OK 74825-0346 | Oil & Gas Operator | Sep 2020 |
| 265 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 266 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 267 | SSB Production LC | Ardmore, OK 73402-0998 | Oil & Gas Operator | Feb 2024 |
| 268 | Stokes Donna L | Blanchard, OK 73010-0364 | Oil & Gas Operator | Jun 2023 |
| 269 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 270 | Stricker Resources Inc | Okmulgee, OK 74447-0773 | Oil & Gas Operator | Nov 2023 |
| 271 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 272 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 273 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 274 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 275 | Tag Team Resources LLC | Eufaula, OK 74432-0841 | Oil & Gas Operator | Jan 2024 |
| 276 | Tallgrass Petroleum Corp | Hominy, OK 74035 | Oil & Gas Operator | Feb 2012 |
| 277 | Tarwater Oil & Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 278 | Tau Ventures | Tulsa, OK 74105-1026 | Oil & Gas Operator | Jan 2024 |
| 279 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Nov 2023 |
| 280 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Dec 2023 |
| 281 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 282 | The Quintin Little Company Inc | Ardmore, OK 73402-1509 | Oil & Gas Operator | Feb 2024 |
| 283 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 284 | Tiger Mountain Gas & Oil | Oklahoma City, OK 73118 | Gas Operator | Sep 1999 |
| 285 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 286 | Tilford Pinson Exploration LLC | Edmond, OK 73003-5278 | Oil & Gas Operator | Jan 2024 |
| 287 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 288 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Feb 2024 |
| 289 | Trinity Oil & Gas Producers LLC | | Oil & Gas Operator | Jan 2024 |
| 290 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 291 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 292 | Truevine Gas Company | Ada, OK 74821-1422 | Oil & Gas Operator | Jan 2024 |
| 293 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2024 |
| 294 | Two Gems Company | McAlester, OK 74502-1996 | Oil & Gas Operator | Jan 2024 |
| 295 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 296 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 297 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 298 | Vega Energy Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Sep 2015 |
| 299 | VRK Oil And Gas, Inc. | Arlington, TX 76016 | Oil & Gas Operator | Mar 2014 |
| 300 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |