| 301 | Pump It Up LLC | Owasso, OK 74055-0723 | Oil Operator | Jun 2024 |
| 302 | Quad Operating Company | Bulverde, TX 78163 | Oil & Gas Operator | Apr 2025 |
| 303 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 304 | R & R Oil Company | Pampa, TX 79065 | Oil & Gas Operator | Jul 2002 |
| 305 | R B Energy, Inc | Manchester, KY 40962 | Oil & Gas Operator | Jan 2015 |
| 306 | R C Oil Company Inc | Nowata, OK 74048-3402 | Oil Operator | Nov 2021 |
| 307 | Rainwater A L | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2013 |
| 308 | Ramey L E SR | Mounds, OK 74047 | Oil Operator | Jan 2000 |
| 309 | Ramey Oil Corporation | Kiefer, OK 74041-0699 | Oil & Gas Operator | May 2025 |
| 310 | Ramey Sharp N Glenn SD Unit | Tulsa, OK 74120 | Oil Operator | Nov 1998 |
| 311 | Ramey Wayne | Mounds, OK 74047 | Oil & Gas Operator | Mar 2025 |
| 312 | Rampage Energy Inc | Bristow, OK 74010-6415 | Oil & Gas Operator | Apr 2020 |
| 313 | Ranch Creek Exploration LLC | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2025 |
| 314 | Ranger Systems Inc | Tulsa, OK 74145 | Oil Operator | Feb 2020 |
| 315 | Raper Brice Oil Company LLC | Yale, OK 74085-6865 | Oil & Gas Operator | Apr 2015 |
| 316 | Ray'S Oil Company | Boynton, OK 74422 | Oil & Gas Operator | May 2025 |
| 317 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 318 | Reddy Oil & Gas Corporation | Tulsa, OK 74108-5105 | Oil & Gas Operator | Jun 2025 |
| 319 | Reed Power Tongs Inc | Seminole, OK 74818 | Oil & Gas Operator | May 2025 |
| 320 | Reliable Oil Industries Inc | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2024 |
| 321 | Resource Operations, Inc. | Tulsa, OK 74157 | Oil & Gas Operator | May 2016 |
| 322 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | May 2025 |
| 323 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 324 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 325 | Robbins Thomas D & Charlene A Revocable Trust | Plano, TX 75093-7471 | Oil Operator | Jul 2018 |
| 326 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 327 | Roberts Zetau J Fisk | Moore, OK 73160 | Oil & Gas Operator | Sep 1993 |
| 328 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 329 | Rock Creek Energy Co | Ada, OK 74820-5725 | Oil Operator | Jul 2022 |
| 330 | Rock Oil Company | Broken Arrow, OK 74014-6106 | Oil & Gas Operator | May 2025 |
| 331 | Rockford CBM LLC | Tulsa, OK 74103-4335 | Oil & Gas Operator | Jan 2013 |
| 332 | Rogers County Coal Seam LLC | Ridgeland, MS 39157-8635 | Oil & Gas Operator | Mar 2015 |
| 333 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 334 | Rongey Oil | Jenks, OK 74037-3621 | Oil & Gas Operator | Jan 2013 |
| 335 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | May 2025 |
| 336 | Rowe Energy | Beggs, OK 74421-0240 | Oil & Gas Operator | Mar 2015 |
| 337 | Royal Energy Resources LTD | Denver, CO 80221 | Oil & Gas Operator | May 2013 |
| 338 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 339 | S H Production LLC | Tulsa, OK 74130-1418 | Oil & Gas Operator | Jun 2025 |
| 340 | Sabos George U | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2013 |
| 341 | Sage NR Ok LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 342 | Saiber Michael L & Lora L | Saxonburg, PA 16056 | Oil Operator | Mar 1997 |
| 343 | Sallee Oil Corporation | Collinsville, OK 74021 | Oil & Gas Operator | Jun 2025 |
| 344 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 345 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 346 | Schad Jeffrey M | Mannford, OK 74044-0995 | Oil Operator | Sep 2021 |
| 347 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 348 | Searcy Brothers Inc | Tulsa, OK 74135-0433 | Oil Operator | Jun 2004 |
| 349 | Select Operating Company Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2014 |
| 350 | Sellmeyer Eugene | Collinsville, OK 74021 | Oil & Gas Operator | Mar 2015 |
| 351 | Sevitski & Associates Inc | Pryor, OK 74361 | Oil & Gas Operator | Dec 2000 |
| 352 | Shadow-Del Oil Company | Kiefer, OK 74041-0453 | Oil & Gas Operator | Jul 2015 |
| 353 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Feb 2025 |
| 354 | Shanks Drilling & Production Company LLC | Bixby, OK 74008 | Oil & Gas Operator | Jan 2025 |
| 355 | Shelton Alec & Glenda | Kiefer, OK 74041 | Oil & Gas Operator | May 2025 |
| 356 | Shideler Enterprises Inc | Drumright, OK 74030 | Oil & Gas Operator | Feb 2019 |
| 357 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034 | Oil Operator | May 2025 |
| 358 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 359 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 360 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 361 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 362 | Slavens II Paul R | Tulsa, OK 74131 | Oil & Gas Operator | May 2025 |
| 363 | Sloan Production Co | | Oil Operator | Jan 2013 |
| 364 | Smith Edward F | Avant, OK 74001-0024 | Oil & Gas Operator | Nov 2014 |
| 365 | Smith Patrica\Judith Miller | Collinsville, OK 74021-6307 | Oil Operator | Jun 2010 |
| 366 | Smith Richard L | Catoosa, OK 74015 | Oil & Gas Operator | Dec 2019 |
| 367 | Smiths Investment Inc | Sperry, OK 74073-4198 | Oil Operator | Apr 2025 |
| 368 | Sneed William A Bill | Cleveland, OK 74020-1007 | Oil & Gas Operator | May 2025 |
| 369 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 370 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 371 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 372 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 373 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 374 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | May 2025 |
| 375 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | May 2025 |
| 376 | Storm Exploration Inc | Skiatook, OK 74070-1014 | Oil & Gas Operator | Jan 2013 |
| 377 | STP Cherokee, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 378 | Summit Energy, Inc. | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 379 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | May 2025 |
| 380 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 381 | T B K Energy Company | Brenham, TX 77833 | Oil & Gas Operator | Jun 2025 |
| 382 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | May 2025 |
| 383 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 384 | Taylor Production Company | Collinsville, OK 74021 | Oil Operator | Nov 1998 |
| 385 | Teale F William | Tulsa, OK 74136-1017 | Oil & Gas Operator | Jun 2000 |
| 386 | Tec Resources, L.L.C. | Tulsa, OK 74128 | Oil & Gas Operator | May 2013 |
| 387 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | May 2025 |
| 388 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 389 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 390 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | May 2025 |
| 391 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 392 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | May 2025 |
| 393 | Threet David Allen | Sand Springs, OK 74063-4035 | Oil & Gas Operator | Apr 2025 |
| 394 | Thunder Petroleum LLC | Owasso, OK 74055-1563 | Oil Operator | Sep 2022 |
| 395 | Tilley Matt Dba Tilley Oil Co | Hominy, OK 74035 | Oil & Gas Operator | May 2025 |
| 396 | Tilley Oil & Gas, Inc. | Oklahoma City, OK 73172 | Oil & Gas Operator | Sep 2025 |
| 397 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | May 2025 |
| 398 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2025 |
| 399 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 400 | Transcoastal Operating LLC | Dallas, TX 75252-5646 | Oil & Gas Operator | Mar 2015 |