| 501 | Pro-Energy Inc | | Oil Operator | Dec 2023 |
| 502 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 503 | Prospective Investment & Trading | Scottsdale, AZ 85261-4190 | Oil & Gas Operator | Jun 2016 |
| 504 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Jan 2024 |
| 505 | Pryor, VIctor W., Jr. | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2017 |
| 506 | Psa Inc | Chandler, OK 74834-4222 | Oil & Gas Operator | Jan 2024 |
| 507 | Pump It Up LLC | | Oil Operator | Jan 2024 |
| 508 | Pure Oil Co | | Oil & Gas Operator | Dec 1996 |
| 509 | Pybas Robert | Wanette, OK 74878 | Oil Operator | Apr 2014 |
| 510 | Pyro Energy Corp | Kingwood, TX 77339-2102 | Oil & Gas Operator | Mar 1998 |
| 511 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2023 |
| 512 | Quanah Company | Tulsa, OK 74159-0469 | Oil & Gas Operator | May 2020 |
| 513 | Quest Cherokee LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2023 |
| 514 | Questar Energy Trading | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2020 |
| 515 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 516 | R & C Oil And Gas Inc | Ada, OK 74820-3150 | Oil Operator | Jul 2016 |
| 517 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2024 |
| 518 | R J Exploration LLC | | Oil & Gas Operator | Jan 2024 |
| 519 | R K R Exploration | Seminole, OK 74868-9754 | Oil & Gas Operator | Mar 2015 |
| 520 | R W Production Company Inc | Ada, OK 74821-2693 | Oil & Gas Operator | Apr 2011 |
| 521 | Radford Dale | Konawa, OK 74849-8828 | Oil & Gas Operator | Nov 2023 |
| 522 | Radford Darin Herbert | Konawa, OK 74849-9318 | Oil & Gas Operator | Dec 2023 |
| 523 | Rainbow Energy Inc | | Oil Operator | Jan 2024 |
| 524 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 525 | Ramhead Petroleum Inc | Seminole, OK 74818-0848 | Oil & Gas Operator | Aug 2008 |
| 526 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Dec 2023 |
| 527 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 528 | Randy And Jan Walker Oil Company LLC | Konawa, OK 74849-9333 | Oil & Gas Operator | Jan 2024 |
| 529 | Ranger Systems Inc | | Oil Operator | Feb 2020 |
| 530 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 531 | Reach Oil And Gas Company Inc | | Oil & Gas Operator | Jan 2024 |
| 532 | Red Fork Oil Co | Lakewood, CO 80215 | Oil & Gas Operator | Aug 1993 |
| 533 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 534 | Redhen Oil Company | Oklahoma City, OK 73155-5449 | Oil & Gas Operator | Jan 2024 |
| 535 | Reed Power Tongs Inc | Seminole, OK 74818-1462 | Oil & Gas Operator | Nov 2023 |
| 536 | Regency Exploration Inc | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 1999 |
| 537 | Regional Energy Corporation | Temple, TX 76503-1733 | Oil Operator | Mar 1996 |
| 538 | Research Oil Company Inc | Norman, OK 73070-8776 | Oil & Gas Operator | Aug 2019 |
| 539 | RF Operating And Supply Inc | | Oil & Gas Operator | Feb 2013 |
| 540 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 541 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 542 | Richard W Thompson Inc | Plano, TX 75026 | Oil & Gas Operator | Jul 2019 |
| 543 | River Valley Oil LLC | | Oil Operator | Jan 2024 |
| 544 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2024 |
| 545 | Rja Energy LLC | | Oil & Gas Operator | Feb 2024 |
| 546 | RKR Exploration Inc | Seminole, OK 74868-1688 | Oil & Gas Operator | Dec 2023 |
| 547 | Roadrunner Energy, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 548 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 549 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 550 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 551 | Robson Petroleum Company | Tulsa, OK 74104 | Oil & Gas Operator | Jan 1995 |
| 552 | Rockbridge Petroleum LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2009 |
| 553 | Rockwell Drilling Company | New York, NY 10013 | Oil & Gas Operator | Dec 2005 |
| 554 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 555 | Romine Oil & Gas LTD | Shawnee, OK 74802-3425 | Oil & Gas Operator | Jan 2013 |
| 556 | Ronmar Engineering & Expl Inc | Ada, OK 74820-1402 | Oil Operator | Aug 2013 |
| 557 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jan 2024 |
| 558 | Roxanna Oil Company | Oklahoma City, OK 73120-2717 | Oil Operator | Aug 2016 |
| 559 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 560 | Royal Petroleum Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jan 2024 |
| 561 | Royalty Energy Development LLC | Edmond, OK 73083 | Oil & Gas Operator | Jan 2024 |
| 562 | Roye Realty & Developing Inc | Stigler, OK 74462-0148 | Gas Operator | Dec 2004 |
| 563 | Rumley Robert A & Associates | Tulsa, OK 74135-1907 | Oil Operator | Nov 2023 |
| 564 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2024 |
| 565 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 566 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 567 | S & W Engine Supply | Oklahoma City, OK 73107 | Oil Operator | Jun 2003 |
| 568 | S/H Petroleum Corporation | Hennessey, OK 73742-0477 | Oil & Gas Operator | Feb 2016 |
| 569 | Salt Creek Energy Company LLC | Shawnee, OK 74802-1505 | Oil & Gas Operator | Dec 2023 |
| 570 | Salty Dog Disposal LLC | | Oil Operator | Feb 2024 |
| 571 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 572 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 573 | Sandy Petroleum Inc | Shawnee, OK 74801-5634 | Oil & Gas Operator | Dec 2023 |
| 574 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2024 |
| 575 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 576 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 577 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 578 | Sasakwa Operating LLC | Oklahoma City, OK 73179-1902 | Oil & Gas Operator | Dec 2023 |
| 579 | Schiff & Jackson Oil Producers | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 580 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 581 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 582 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 583 | Seaport Inc | Edmond, OK 73083-5646 | Oil & Gas Operator | Dec 2023 |
| 584 | Sellers Jack B Estate Of | Cleveland, OK 74020-0034 | Oil & Gas Operator | Dec 2023 |
| 585 | Semcrude LP | | Oil & Gas Operator | Jul 2008 |
| 586 | Seminole Company (The) | | Oil Operator | Dec 1994 |
| 587 | Seminole Tank Service | Seminole, OK 74818-1587 | Oil & Gas Operator | Dec 2023 |
| 588 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 589 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 590 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 591 | Sharber Don E | Okemah, OK 74859-0322 | Oil Operator | Dec 2018 |
| 592 | Sharber Production Inc | Seminole, OK 74868-0581 | Oil & Gas Operator | Oct 2023 |
| 593 | Sharp Anthony G | Shawnee, OK 74802-1701 | Oil & Gas Operator | Jul 2003 |
| 594 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 595 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 2024 |
| 596 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 597 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2024 |
| 598 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Dec 2023 |
| 599 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 600 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |