| 601 | Pelican Production Company | New Orleans, LA 70130-2477 | Oil & Gas Operator | Mar 2014 |
| 602 | Penner Energy Inc | Oklahoma City, OK 73120-1930 | Oil & Gas Operator | Feb 2026 |
| 603 | Pennzoil Company | Midland, TX 79710-0090 | Oil & Gas Operator | Mar 2000 |
| 604 | Pennzoil Explor & Prod Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2000 |
| 605 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 606 | Perkins Energy Company | Duncan, OK 73533-3853 | Oil & Gas Operator | Feb 2026 |
| 607 | Perkins Mike | Velma, OK 73091 | Oil & Gas Operator | Jan 2006 |
| 608 | Perkins, Bobby R | | Oil Operator | Mar 2017 |
| 609 | Perkins, Earl | | Oil & Gas Operator | Aug 2013 |
| 610 | Permian West Corp. | Odessa, TX 79762 | Oil & Gas Operator | Apr 2026 |
| 611 | Petro Davis Inc | Oklahoma City, OK 73142-1807 | Oil & Gas Operator | Jan 2013 |
| 612 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 613 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 614 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 615 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 616 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 617 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 618 | PHD Oil & Gas Inc | Rush Springs, OK 73082-0218 | Oil & Gas Operator | May 2021 |
| 619 | Phillips Operating Co. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jan 2013 |
| 620 | Phoenix Energy Partners LLC | Marlow, OK 73055 | Oil Operator | Jan 2026 |
| 621 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Feb 2026 |
| 622 | Pickelsimer Kenny | Wilson, OK 73463-6502 | Oil & Gas Operator | Aug 2014 |
| 623 | Pierce O M Operations | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 624 | Pierce Patsey R The Estate Of | Duncan, OK 73533-4900 | Oil Operator | Mar 2007 |
| 625 | Piper Operating LLC | Stigler, OK 74462 | Oil & Gas Operator | Feb 2026 |
| 626 | Pixley Carlis D | Marlow, OK 73055 | Oil & Gas Operator | Sep 1999 |
| 627 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 628 | Pletcher Oil Limited Liability Company | Ardmore, OK 73401 | Oil & Gas Operator | Dec 2025 |
| 629 | Pogue Randall | Ada, OK 74821-1547 | Oil & Gas Operator | Apr 2014 |
| 630 | Poorboy Oil Inc | Velma, OK 73491 | Oil & Gas Operator | Jul 2022 |
| 631 | Positive Energy LLC | Ada, OK 74820 | Oil & Gas Operator | Jan 2026 |
| 632 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 633 | Powell Oil | Healdton, OK 73438-4463 | Oil & Gas Operator | Jan 2026 |
| 634 | Prairiedale Energy Inc | Duncan, OK 73533-3657 | Oil & Gas Operator | Feb 2026 |
| 635 | Preston Carter Oil Company | Davis, OK 73030 | Oil & Gas Operator | Jan 2026 |
| 636 | Price Brothers Oil Co | Duncan, OK 73533 | Oil Operator | Feb 1996 |
| 637 | Price J R Inc | Addington, OK 73520-0099 | Oil & Gas Operator | Apr 2015 |
| 638 | Price, W. H. | Granbury, TX 76048 | Oil & Gas Operator | Jun 2024 |
| 639 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2026 |
| 640 | Primary Natural Resources Inc. | Tulsa, OK 74136-6351 | Oil & Gas Operator | Mar 2023 |
| 641 | Prime Energy Corp | Charleston, WV 25301-1707 | Oil & Gas Operator | Sep 2015 |
| 642 | Prime Operating Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 643 | Priority Holdings LLC | Marlow, OK 73055 | Oil Operator | Jan 2026 |
| 644 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 645 | Protege Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2018 |
| 646 | Pruitt Operating Company LLC | Ratliff City, OK 73481-5802 | Oil & Gas Operator | Feb 2026 |
| 647 | Psec Inc | Tulsa, OK 74102-0871 | Oil & Gas Operator | Dec 2016 |
| 648 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2026 |
| 649 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 650 | R & H LLC | Ardmore, OK 73401-6329 | Oil & Gas Operator | Mar 2015 |
| 651 | R & S Oil Company | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2013 |
| 652 | R L Turner Oil Company LLC | Duncan, OK 73533 | Oil Operator | Jan 2026 |
| 653 | Ra-Jac LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2026 |
| 654 | Raizen Oil Company | Velma, OK 73091 | Oil & Gas Operator | Feb 2016 |
| 655 | Raizen Oil LLC | Duncan, OK 73533-4657 | Oil & Gas Operator | Nov 2003 |
| 656 | Ramsey Property Management LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2026 |
| 657 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 658 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 659 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 660 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 661 | Rar Properties LLC | Duncan, OK 73533 | Oil Operator | Dec 2025 |
| 662 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 663 | Ratliff City Trucking Inc | Ratliff City, OK 73481-9603 | Oil & Gas Operator | Feb 2018 |
| 664 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jan 2026 |
| 665 | Ray Herman | Haskell, OK 74436-0446 | Oil & Gas Operator | Dec 2021 |
| 666 | Raye Oil Company | Velma, OK 73491-0482 | Oil & Gas Operator | Oct 2012 |
| 667 | Reames Jr Keith E | Duncan, OK 73534-0246 | Oil & Gas Operator | Jul 1999 |
| 668 | Rebellion Energy LLC | Tulsa, OK 74135-6241 | Oil & Gas Operator | Jun 2022 |
| 669 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 670 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Feb 2026 |
| 671 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Jan 2026 |
| 672 | Redhill Operating LLC | Duncan, OK 73533 | Oil & Gas Operator | Feb 2026 |
| 673 | Redland Resources LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2026 |
| 674 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jan 2026 |
| 675 | Reign Operating LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2026 |
| 676 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 677 | Reo Resources Inc | | Oil & Gas Operator | Apr 2018 |
| 678 | Rice Patricia Dba Rice Oil | Duncan, OK 73533-1888 | Oil Operator | Jan 2021 |
| 679 | Richardson WM S | Duncan, OK 73533 | Oil Operator | Jun 2013 |
| 680 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 681 | Ridge Petroleum Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 682 | Rif Raf Inc | Norman, OK 73069 | Oil Operator | May 1999 |
| 683 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Feb 2026 |
| 684 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 685 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Dec 2025 |
| 686 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2026 |
| 687 | Roan Resources LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Apr 2024 |
| 688 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 689 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 690 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 691 | Robinson Tracy D | Duncan, OK 73534 | Oil Operator | Oct 2018 |
| 692 | Rocket Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Apr 2015 |
| 693 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 694 | Roring Arthur | Ratliff City, OK 73481 | Oil Operator | Jan 2026 |
| 695 | Roring Jr Roy W | Duncan, OK 73533-3048 | Oil & Gas Operator | Aug 2022 |
| 696 | Roring Roy W | Ardmore, OK 73401 | Oil & Gas Operator | Dec 1998 |
| 697 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 698 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 699 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Feb 2026 |
| 700 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Feb 2026 |