| 301 | Prentice Bro Oil Operators | Allen, OK 74825 | Oil & Gas Operator | Apr 2014 |
| 302 | Prentice Ed | Allen, OK 74825 | Oil & Gas Operator | Mar 2026 |
| 303 | Primrose Jimmie | | Oil Operator | Feb 1998 |
| 304 | Prosper Oil & Gas,Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 305 | Pryor VIctor W Jr | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2017 |
| 306 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 307 | Quanah Company | Tulsa, OK 74159-0469 | Oil & Gas Operator | May 2020 |
| 308 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 309 | R & C Oil And Gas Inc | Ada, OK 74820-3150 | Oil Operator | Jul 2016 |
| 310 | R H S Inc | Ada, OK 74821-1252 | Oil & Gas Operator | Apr 2020 |
| 311 | R J Exploration LLC | Konawa, OK 74849 | Oil & Gas Operator | Mar 2026 |
| 312 | R W Production Company Inc | Ada, OK 74821-2693 | Oil & Gas Operator | Apr 2011 |
| 313 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Jun 2026 |
| 314 | Randy And Jan Walker Oil Company LLC | Konawa, OK 74849-9333 | Oil & Gas Operator | Mar 2026 |
| 315 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 316 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 317 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 318 | Red Rock Resources, L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Feb 2026 |
| 319 | Red Sand Resources LLC | Ada, OK 74821 | Oil Operator | Mar 2026 |
| 320 | Redland Resources LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Mar 2026 |
| 321 | Regency Petroleum Inc | Jones, OK 73049-8724 | Oil & Gas Operator | Mar 1999 |
| 322 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 323 | River Valley Oil LLC | Konawa, OK 74849 | Oil Operator | Mar 2026 |
| 324 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 325 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Mar 2026 |
| 326 | Roblyn Oil Inc | Allen, OK 74825-6933 | Oil & Gas Operator | Dec 2025 |
| 327 | Rock Creek Energy Co | Ada, OK 74820-5725 | Oil Operator | Jul 2022 |
| 328 | Ronmar Engineering & Expl Inc | Ada, OK 74820-1402 | Oil Operator | Aug 2013 |
| 329 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 330 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 331 | Roxanna Oil Company | Oklahoma City, OK 73120-2717 | Oil Operator | Aug 2016 |
| 332 | Royal Drilling Inc | Russell, KS 67665 | Oil Operator | Feb 2026 |
| 333 | Rumley Robert A & Associates | Tulsa, OK 74135-1907 | Oil Operator | Feb 2026 |
| 334 | S & W Transports Inc | Velma, OK 73491 | Oil Operator | Jan 2026 |
| 335 | Salt Creek Energy Company LLC | Shawnee, OK 74802-1505 | Oil & Gas Operator | Feb 2026 |
| 336 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 337 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 338 | San Francisco-Okla Pet Ex Inc | | Oil & Gas Operator | Apr 2014 |
| 339 | Sandy Petroleum Inc | Shawnee, OK 74801-5634 | Oil & Gas Operator | Feb 2026 |
| 340 | Sanford Casondra | Ada, OK 74820-4460 | Oil & Gas Operator | May 2013 |
| 341 | Santa Fe Operating LLC | Frisco, TX 75034 | Oil & Gas Operator | Mar 2026 |
| 342 | SBR Oil LLC | Ada, OK 74821 | Oil Operator | Sep 2025 |
| 343 | Sellers Jack B Estate Of | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2026 |
| 344 | Seminole Tank Service | Seminole, OK 74818-1587 | Oil & Gas Operator | Feb 2026 |
| 345 | Shadowpeak Operating LLC | Oklahoma City, OK 73159-6905 | Oil & Gas Operator | Feb 2026 |
| 346 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 347 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 348 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jun 2026 |
| 349 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 350 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 351 | Slim Hole Inc | Farmington, NM 87401-7725 | Oil & Gas Operator | May 2013 |
| 352 | Smith Brothers Enterprises | Ardmore, OK 73402 | Oil Operator | Jul 1998 |
| 353 | Smith Max Dean | Wewoka, OK 74884 | Oil & Gas Operator | Feb 2026 |
| 354 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 355 | South Ranch Corporation | Midland, TX 79707 | Oil Operator | Sep 2019 |
| 356 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442 | Oil & Gas Operator | Mar 2026 |
| 357 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 358 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 359 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 360 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 361 | Stephens Operating Inc | Ardmore, OK 73401 | Oil & Gas Operator | Sep 2014 |
| 362 | Stephenson W W Pet Corp | Edmond, OK 73003-0014 | Oil & Gas Operator | Jul 2017 |
| 363 | Stoneridge Oil Inc | Ponca City, OK 74601-1600 | Oil & Gas Operator | Jan 2001 |
| 364 | Sutton Energy LLC | Ada, OK 74820 | Oil & Gas Operator | Mar 2026 |
| 365 | Sutton Oil Company, LLC | Loco, OK 73442 | Oil Operator | Mar 2026 |
| 366 | Swadley Roy W & Judith I | Holdenville, OK 74848-0794 | Oil & Gas Operator | Mar 2015 |
| 367 | Swenton Michael J | Tulsa, OK 74105 | Oil & Gas Operator | Mar 2026 |
| 368 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 369 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 370 | T Willoughby, LLC | Ada, OK 74820 | Oil Operator | Feb 2026 |
| 371 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 372 | Tandem Oil Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Oct 1998 |
| 373 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 374 | Ten Grand Energy Company Inc | Nachogdoches, TX 75963-1880 | Oil Operator | Mar 2011 |
| 375 | Terry Jack | Konawa, OK 74849-0337 | Oil Operator | Feb 2012 |
| 376 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Mar 2026 |
| 377 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 378 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Mar 2025 |
| 379 | Texas United Petroleum Inc | Dallas, TX 75243 | Oil & Gas Operator | Jun 2003 |
| 380 | The Guinn Company LLC | Asher, OK 74826-6012 | Oil & Gas Operator | Dec 2025 |
| 381 | The KT Oil Company LLC | Ada, OK 74820 | Oil & Gas Operator | Mar 2026 |
| 382 | The Twenty Eleven Corp Inc | Ada, OK 74820-3605 | Oil Operator | Jan 2026 |
| 383 | The William R Earnhardt Company | Bristow, OK 74010 | Oil & Gas Operator | Feb 2026 |
| 384 | Thomas Blankenship Dba B S Oil Company | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2026 |
| 385 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 386 | Tidwell Oil LLC | Roff, OK 74865 | Oil Operator | Feb 2022 |
| 387 | Tiger Oil Company | Dallas, TX 75221 | Oil & Gas Operator | May 2007 |
| 388 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Mar 2026 |
| 389 | TKL Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Oct 2025 |
| 390 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2026 |
| 391 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 392 | Tracy & Associates Inc | Ada, OK 74820 | Oil & Gas Operator | Apr 2014 |
| 393 | Triangle Interprises Inc | Justin, TX 76247-0598 | Oil & Gas Operator | Jun 2015 |
| 394 | Trinity Oil & Gas Producers LLC | Allen, OK 74825 | Oil & Gas Operator | Mar 2026 |
| 395 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 396 | True Performance Administrators LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 397 | Truevine Operating LLC | Ada, OK 74821-1422 | Oil & Gas Operator | Feb 2026 |
| 398 | Turpin Ledon Production | Ada, OK 74820-0549 | Oil Operator | Dec 2025 |
| 399 | Twisted Oak Operating LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2026 |
| 400 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Mar 2026 |