| 601 | Pegasus Energy Corporation | Oklahoma City, OK 73162 | Oil & Gas Operator | Mar 2015 |
| 602 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 603 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 604 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 605 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 606 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 607 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 608 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 609 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 610 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 611 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Apr 2025 |
| 612 | Phase III Drilling Inc | Wetumka, OK 74883-0333 | Oil & Gas Operator | Jan 2025 |
| 613 | Phoenix Hydrocarbons Operating Co | Midland, TX 79702-3638 | Oil & Gas Operator | Jul 2018 |
| 614 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2025 |
| 615 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2025 |
| 616 | Pioneer Resources Prod LP | Irving, TX 75039-3745 | Oil & Gas Operator | Feb 2005 |
| 617 | Piper Operating LLC | Stigler, OK 74462 | Oil & Gas Operator | Feb 2025 |
| 618 | Pitco Production Company | Tulsa, OK 74170-2320 | Oil & Gas Operator | May 2013 |
| 619 | Plains Liquids Transport Inc | Houston, TX 77002 | Oil & Gas Operator | May 1996 |
| 620 | Plains Marketing & Trans Inc | Houston, TX 76002 | Oil & Gas Operator | Oct 1998 |
| 621 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 622 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 623 | Plainsmen Energy LLC | Enid, OK 73703-5747 | Oil & Gas Operator | Feb 2025 |
| 624 | Pletcher Oil Limited Liability Company | Ardmore, OK 73401 | Oil & Gas Operator | Feb 2025 |
| 625 | Plotner Oil Company | Oklahoma City, OK 73122 | Oil & Gas Operator | Feb 2025 |
| 626 | Plotner Ralph Oil & Gas Inv Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2021 |
| 627 | Portal Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 628 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 629 | Post Petroleum Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Aug 2013 |
| 630 | Potter J And D Oil LLC | Kingfisher, OK 73750-3832 | Oil & Gas Operator | Mar 2015 |
| 631 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Apr 2025 |
| 632 | Prentice Napier & Green Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2025 |
| 633 | Presidio Energy, Inc. | | Oil & Gas Operator | Jan 1992 |
| 634 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2025 |
| 635 | Primary Natural Resources Inc. | Tulsa, OK 74136-6351 | Oil & Gas Operator | Mar 2023 |
| 636 | Prime Energy Corp | Charleston, WV 25301-1707-1707 | Oil & Gas Operator | Sep 2015 |
| 637 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 638 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 639 | Production Systems Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 640 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Apr 2025 |
| 641 | Prospective Investment & Trading | Scottsdale, AZ 85261-4190 | Oil & Gas Operator | Jun 2016 |
| 642 | Protege Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2018 |
| 643 | Pyramid Oil Of America, Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jan 2025 |
| 644 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 645 | Quanah Company | Tulsa, OK 74159-0469 | Oil & Gas Operator | May 2020 |
| 646 | Quantum Oil & Gas Corporation | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2025 |
| 647 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Jan 2025 |
| 648 | Quest Property Inc | Yukon, OK 73099 | Oil & Gas Operator | Jan 2025 |
| 649 | Questar Energy Trading | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2020 |
| 650 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 651 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 652 | R360 Oklahoma LLC | The Woodlands, TX 77381 | Oil Operator | Jul 2021 |
| 653 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 654 | Raf Oil Company | Oklahoma City, OK 73120-1944 | Oil & Gas Operator | Jul 2013 |
| 655 | Rafter H Operating LLC | El Reno, OK 73036 | Oil & Gas Operator | Jan 2025 |
| 656 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 657 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 658 | Ramsey Engineering Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 1993 |
| 659 | Ramsey Nichols Operating Company LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Feb 2025 |
| 660 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Dec 2024 |
| 661 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 662 | Randy And Jan Walker Oil Company LLC | Konawa, OK 74849-9333 | Oil & Gas Operator | Feb 2025 |
| 663 | Randy Inc | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 664 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 665 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 666 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 667 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Jan 2025 |
| 668 | Raw Crude Oil & Gas LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 669 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2025 |
| 670 | Raydon Production Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 1992 |
| 671 | RDH Enterprises, Inc. | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 672 | Rebellion Energy LLC | Tulsa, OK 74135-6241 | Oil & Gas Operator | Jun 2022 |
| 673 | Red Bluff Resources Operating LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Jan 2025 |
| 674 | Red Eagle Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2005 |
| 675 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Feb 2025 |
| 676 | Red Plains Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2017 |
| 677 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Feb 2025 |
| 678 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Feb 2025 |
| 679 | Redfork Operations LLC | Dover, OK 73734-9409 | Oil & Gas Operator | Feb 2025 |
| 680 | Redland Resources, LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2025 |
| 681 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 682 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jan 2025 |
| 683 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jan 2025 |
| 684 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2024 |
| 685 | Revolution Resources LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jun 2023 |
| 686 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 687 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 688 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 689 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 690 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 691 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Jan 2025 |
| 692 | Rio Blanco Operating LLC | Victoria, TX 77904 | Oil & Gas Operator | Jan 2025 |
| 693 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 694 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2025 |
| 695 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 696 | Roan Resources LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Apr 2024 |
| 697 | Rockwell Energy Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2014 |
| 698 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 699 | Roka Management Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Feb 2025 |
| 700 | Roka Resources Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | Jan 2025 |