| 301 | Plains Marketing & Trans Inc | Houston, TX 76002 | Oil & Gas Operator | Oct 1998 |
| 302 | Priam Operating Company | Tulsa, OK 74152-0590 | Oil & Gas Operator | Jul 2022 |
| 303 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2024 |
| 304 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Jan 2024 |
| 305 | Providence Exploration & Production Inc | Fort Smith, AR 72913-5171 | Gas Operator | Dec 2012 |
| 306 | Psec Inc | Tulsa, OK 74102-0871 | Oil & Gas Operator | Dec 2016 |
| 307 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 308 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2024 |
| 309 | Quality Production Co Of Stigler Inc | Stigler, OK 74462-0635 | Gas Operator | Feb 2013 |
| 310 | Questar Energy Trading | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2020 |
| 311 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 312 | Quinton Rental & Repair Serv Inc | Quinton, OK 74561-0432 | Oil & Gas Operator | Mar 2015 |
| 313 | R A Miller Energy Inc | Edmond, OK 73003 | Oil & Gas Operator | Mar 2020 |
| 314 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 315 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 316 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 317 | Reading & Bates Petroleum Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 318 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 319 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2024 |
| 320 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 321 | Redwine Resources Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2015 |
| 322 | Revere Corporation | Fort Smith, AR 72902-0908 | Oil & Gas Operator | Feb 2015 |
| 323 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 324 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 325 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | May 2024 |
| 326 | Riley Exploration Operating Co LLC | | Gas Operator | Jun 2017 |
| 327 | Rio VIsta Operating LLC | Eufaula, OK 74432-0789 | Gas Operator | Jan 2024 |
| 328 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Feb 2024 |
| 329 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 330 | Rockin S Field Service LLC | | Gas Operator | Jan 2024 |
| 331 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 332 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 333 | Roye Realty & Developing Inc | Stigler, OK 74462-0148 | Gas Operator | Dec 2004 |
| 334 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 335 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2024 |
| 336 | Sagely, Floyd E Properties, LTD | Fort Smith, AR 72917-0308 | Gas Operator | Jan 2015 |
| 337 | Salt Plain Pipeline Corp | Edmond, OK 73013 | Oil & Gas Operator | Jun 2010 |
| 338 | Salty Dog Disposal LLC | | Oil Operator | Mar 2024 |
| 339 | Samson Gas Producing Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 340 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 341 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 342 | San Francisco-Okla Pet Ex Inc | | Oil & Gas Operator | Apr 2014 |
| 343 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Jan 2024 |
| 344 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 345 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | May 2024 |
| 346 | Sanguine Gathering Company | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2018 |
| 347 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 348 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 349 | Scarth Oil & Gas Co | Amarillo, TX 79101 | Oil & Gas Operator | Feb 1999 |
| 350 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | May 2024 |
| 351 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 352 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 353 | Seaport Inc | Edmond, OK 73083-5646 | Oil & Gas Operator | Feb 2024 |
| 354 | Sedna Energy LLC | Blanchard, OK 73010-8043 | Gas Operator | Apr 2017 |
| 355 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 356 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 357 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 358 | Shields Energy Inc | Fort Smith, AR 72901-4607 | Oil & Gas Operator | Jan 2024 |
| 359 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 360 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 361 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2023 |
| 362 | Sloan Petroleum Service Inc | Edmond, OK 73003-0018 | Oil & Gas Operator | Feb 2024 |
| 363 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | May 2024 |
| 364 | Smith Shirley C | Claremore, OK 74017-0060 | Oil & Gas Operator | Mar 2015 |
| 365 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 366 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 367 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Feb 2024 |
| 368 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 369 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 370 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 371 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 372 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 373 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 374 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 375 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2024 |
| 376 | Stover Company | Tulsa, OK 74152-0786 | Oil & Gas Operator | Jan 2013 |
| 377 | Striker Management Co LLC | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2024 |
| 378 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 379 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 380 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 381 | Tag Team Resources LLC | Eufaula, OK 74432-0841 | Oil & Gas Operator | Jan 2024 |
| 382 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 383 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | May 2024 |
| 384 | Tenaska Marketing Ventures | Omaha, NE 68154 | Oil & Gas Operator | Mar 2021 |
| 385 | Tennessee Gas Pipeline Company | Houston, TX 77252 | Oil & Gas Operator | Dec 2011 |
| 386 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jan 2024 |
| 387 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 388 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 389 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 390 | Texinia Limited Partnership | Dallas, TX 75201 | Gas Operator | Jan 2017 |
| 391 | Texinia Oil & Gas Inc. | Dallas, TX 75214 | Oil & Gas Operator | Jan 2024 |
| 392 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 393 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Jan 2024 |
| 394 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 395 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 396 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 397 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 398 | Total Petroleum Inc | Denver, CO 80201-0500 | Oil & Gas Operator | Nov 2006 |
| 399 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 400 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |