| 501 | Red Wolf Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 502 | Redgate Petroleum Inc | Waynoka, OK 73860-9408 | Oil & Gas Operator | Mar 2014 |
| 503 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2024 |
| 504 | Redline Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 505 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 506 | Resource Oil And Gas, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2024 |
| 507 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jan 2024 |
| 508 | Richard W Thompson Inc | Plano, TX 75026 | Oil & Gas Operator | Jul 2019 |
| 509 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 510 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | May 2024 |
| 511 | Rives Owen H | Holdenville, OK 74848-0913 | Oil & Gas Operator | Nov 2000 |
| 512 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 513 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2024 |
| 514 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 515 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 516 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 517 | Roberts Zetau J Fisk | Moore, OK 73160 | Oil & Gas Operator | Sep 1993 |
| 518 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 519 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 520 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | May 2024 |
| 521 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Jan 2024 |
| 522 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Feb 2024 |
| 523 | S & G Operating LLC | Kingfisher, OK 73750-0256 | Oil & Gas Operator | Feb 2024 |
| 524 | Salty Dog Disposal LLC | | Oil Operator | Mar 2024 |
| 525 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 526 | Samson Gas Producing Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 527 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 528 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 529 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 530 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 531 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 532 | Santo Resources Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 1998 |
| 533 | Scoggins Production LLC | | Oil & Gas Operator | Feb 2024 |
| 534 | Seabren Gas System Inc | Okla City, OK 73112 | Oil & Gas Operator | Mar 2016 |
| 535 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 536 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 537 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 538 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Feb 2024 |
| 539 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 540 | Seven Horses LLC | Alva, OK 73717-5004 | Oil & Gas Operator | Feb 2024 |
| 541 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 542 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2024 |
| 543 | Shelly Energy Inc. | Berwyn, PA 19312 | Oil & Gas Operator | Feb 2024 |
| 544 | Sherman Oil & Gas Co Inc | Chandler, OK 74834-0571 | Oil & Gas Operator | Apr 2020 |
| 545 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | May 2024 |
| 546 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 547 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Feb 2024 |
| 548 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 549 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 550 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 551 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2024 |
| 552 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2023 |
| 553 | Sloan Petroleum Service Inc | Edmond, OK 73003-0018 | Oil & Gas Operator | Feb 2024 |
| 554 | Smokey Trail LLC | Eastlake, CO 80241-1640 | Oil & Gas Operator | Feb 2024 |
| 555 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 556 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Feb 2024 |
| 557 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 558 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2023 |
| 559 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 560 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 561 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2024 |
| 562 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Feb 2024 |
| 563 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Feb 2024 |
| 564 | Spring Valley Oil & Gas Inc | Drummond, OK 73735-0175 | Oil & Gas Operator | Feb 2024 |
| 565 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 566 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 567 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 568 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 569 | Staghorn Petroleum LLC | | Oil & Gas Operator | Jan 2024 |
| 570 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Feb 2024 |
| 571 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 572 | Steele Jr Guy M Test Trust | Dallas, TX 75214-3756 | Gas Operator | Mar 2018 |
| 573 | Stephen Michael Inc | Midwest City, OK 73130-5200 | Oil & Gas Operator | Oct 2015 |
| 574 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Feb 2024 |
| 575 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2024 |
| 576 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 577 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | May 2024 |
| 578 | Stover Company | Tulsa, OK 74152-0786 | Oil & Gas Operator | Jan 2013 |
| 579 | Stride Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 580 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 581 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 582 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 583 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 584 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 585 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 586 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Feb 2024 |
| 587 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 588 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2024 |
| 589 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 590 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 591 | Tag Oil Co LLC | | Oil & Gas Operator | Feb 2024 |
| 592 | Tapoil Inc | Elmore City, OK 73433-9077 | Oil & Gas Operator | Jul 2021 |
| 593 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2024 |
| 594 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 595 | TD Operating Inc | El Reno, OK 73036-1035 | Oil & Gas Operator | Feb 2024 |
| 596 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2024 |
| 597 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 598 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 599 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Feb 2024 |
| 600 | Teocalli Exploration LLC | | Oil & Gas Operator | Feb 2024 |