| 401 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 402 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 403 | Remo Production Co | Stillwater, OK 74074-9333 | Oil Operator | Apr 2014 |
| 404 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 405 | RKR Exploration Inc | Seminole, OK 74868-1688 | Oil & Gas Operator | Jan 2024 |
| 406 | Robbins Thomas D & Charlene A Revocable Trust | Plano, TX 75093-7471 | Oil Operator | Jul 2018 |
| 407 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 408 | Rocky Top Energy LLC | | Oil & Gas Operator | Dec 2023 |
| 409 | Roe Oil Company | Cushing, OK 74023-0086 | Oil & Gas Operator | Jul 2023 |
| 410 | Rogers County Coal Seam LLC | Ridgeland, MS 39157-8635 | Oil & Gas Operator | Mar 2015 |
| 411 | Rogers Jerry L | Cushing, OK 74023-0911 | Oil & Gas Operator | Mar 2017 |
| 412 | Rogers Well Service Inc | Ponca City, OK 74601 | Oil & Gas Operator | Apr 2014 |
| 413 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 414 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 415 | Royalty Energy Development LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2024 |
| 416 | RTB Oil Inc | Crescent, OK 73028-0686 | Oil Operator | May 2016 |
| 417 | Ruh Oil Company | Owasso, OK 74055-0841 | Oil & Gas Operator | Dec 2023 |
| 418 | S & C Resources Inc | Cleveland, OK 74020-0604 | Oil Operator | Jan 2024 |
| 419 | S & M Production Inc | Pawnee, OK 74058-4516 | Oil & Gas Operator | Aug 2023 |
| 420 | Sabos George U | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2013 |
| 421 | Sallee Oil Corporation | Collinsville, OK 74021-0550 | Oil & Gas Operator | Jan 2024 |
| 422 | Salty Dog Disposal LLC | | Oil Operator | Mar 2024 |
| 423 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 424 | Scavenger Oil Co., Inc. | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 425 | Schuler Jr Chris C | Cleveland, OK 74020 | Oil Operator | Aug 2013 |
| 426 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 427 | Semcrude LP | | Oil & Gas Operator | Jul 2008 |
| 428 | Senax Inc | Tulsa, OK 74105-2206 | Oil & Gas Operator | Jan 2024 |
| 429 | Sentinel Transportation LLC | | Oil & Gas Operator | Feb 2024 |
| 430 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 431 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 432 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Jan 2024 |
| 433 | Shallow Energy Inc | South Dennis, MA 02660-2028 | Oil & Gas Operator | Jan 2024 |
| 434 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 435 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 436 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2024 |
| 437 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 438 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 439 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034-0033 | Oil Operator | Dec 2023 |
| 440 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Jan 2024 |
| 441 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 442 | Sneed Drilling Company | | Oil & Gas Operator | Dec 2023 |
| 443 | Sneed William A Bill | Cleveland, OK 74020-1007 | Oil & Gas Operator | Jan 2024 |
| 444 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 445 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 446 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 447 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 448 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 449 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 450 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Feb 2024 |
| 451 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 452 | Sparks Greg | Afton, OK 74331-3897 | Oil & Gas Operator | Jan 2024 |
| 453 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2024 |
| 454 | Spears Terry | Osage, OK 74054 | Oil Operator | Nov 2023 |
| 455 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2024 |
| 456 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Feb 2024 |
| 457 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 458 | Stacy Operating LLC | Cushing, OK 74023-0511 | Oil & Gas Operator | Jan 2024 |
| 459 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 460 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 461 | Stevens Quincy O | Oklahoma City, OK 73116-4102 | Oil & Gas Operator | Dec 2019 |
| 462 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 463 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 464 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Feb 2024 |
| 465 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 466 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 467 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 468 | Tap Petroleum Inc | Cleveland, OK 74020-0054 | Oil & Gas Operator | Apr 2020 |
| 469 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 470 | Tarka Energy LLC | | Oil & Gas Operator | Mar 2022 |
| 471 | Taylor International Inc | Drumright, OK 74030-1173 | Oil & Gas Operator | Mar 2020 |
| 472 | Taylor R Clark Exploration Inc | | Oil & Gas Operator | Aug 1992 |
| 473 | TC3 Operating Co. | Dallas, TX 75248 | Oil & Gas Operator | Jul 1996 |
| 474 | Territory Resources LLC | Stillwater, OK 74074-1869 | Oil & Gas Operator | Feb 2024 |
| 475 | Terry John Trust | Aurora, CO 80012-5112 | Oil & Gas Operator | May 2016 |
| 476 | Terry Production Co | Stroud, OK 74079-0475 | Oil & Gas Operator | Aug 2008 |
| 477 | Terzan Energy II LLC | | Oil & Gas Operator | Jan 2024 |
| 478 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 479 | Texasgulf Inc. | Newgulf, TX 77462 | Oil & Gas Operator | Jul 1994 |
| 480 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 481 | The Warren Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2016 |
| 482 | Thomas E L | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2015 |
| 483 | Thomas Exploration Company | Tulsa, OK 74136-6302 | Oil & Gas Operator | Feb 2024 |
| 484 | Three Sands Oil Inc | Perry, OK 73077-0853 | Oil & Gas Operator | May 2023 |
| 485 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2024 |
| 486 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 487 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Jan 2024 |
| 488 | Trey Resources Inc. | Midland, TX 79710 | Oil & Gas Operator | Jan 2024 |
| 489 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 490 | Triple B Resources | Barnsdall, OK 74002-9759 | Oil & Gas Operator | May 2014 |
| 491 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 492 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 493 | Tru Operating LLC | | Oil & Gas Operator | Apr 2023 |
| 494 | Tucker Gary & Deedee | Jennings, OK 74038-0053 | Oil & Gas Operator | Aug 2023 |
| 495 | U.S. Energy Development Corp | Arlington, TX 76011 | Oil & Gas Operator | May 2024 |
| 496 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 497 | United Production Company LLC | Edmond, OK 73083-5348 | Oil & Gas Operator | Feb 2024 |
| 498 | Usedc Okc LLC | | Oil & Gas Operator | May 2018 |
| 499 | Vancol Oil Co Inc | Ponca City, OK 74602-0030 | Oil & Gas Operator | May 2018 |
| 500 | Victory Petroleum Inc | Tulsa, OK 74170-0354 | Oil & Gas Operator | May 2013 |