| 601 | Pelican Production Company | New Orleans, LA 70130-2477 | Oil & Gas Operator | Mar 2014 |
| 602 | Pemco LLC | Skiatook, OK 74070-4018 | Oil Operator | Aug 2024 |
| 603 | Pemex Inc | Dallas, TX 75367-0249 | Oil & Gas Operator | Nov 2015 |
| 604 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Oct 2024 |
| 605 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Jan 2025 |
| 606 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Jan 2025 |
| 607 | Perkins Energy Company | Duncan, OK 73533-3853 | Oil & Gas Operator | Feb 2025 |
| 608 | Perkins Production Company Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2006 |
| 609 | Perrin, Mary L | | Oil & Gas Operator | Oct 2005 |
| 610 | Petrogas Exploration Inc | | Oil Operator | Sep 2024 |
| 611 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 612 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 613 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 614 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 615 | Petromerica Operating LLC | Oklahoma City, OK 73102-4613 | Oil Operator | Jan 2025 |
| 616 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Apr 2025 |
| 617 | PHD Oil & Gas Inc | Rush Springs, OK 73082-0218 | Oil & Gas Operator | May 2021 |
| 618 | Phillips, Warren P | | Oil & Gas Operator | Apr 2011 |
| 619 | Phoenix Hydrocarbons Operating Co | Midland, TX 79702-3638 | Oil & Gas Operator | Jul 2018 |
| 620 | Pierce Oil Company | Skiatook, OK 74070 | Oil & Gas Operator | Nov 2017 |
| 621 | Pinnacle Corporation (The) | Broken Arrow, OK 74012 | Oil & Gas Operator | Nov 2014 |
| 622 | Pinnacle Operating Company LLC | Tulsa, OK 74137 | Oil & Gas Operator | Jan 2025 |
| 623 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Apr 2025 |
| 624 | Pitcock, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 625 | Pittencrieff America Inc | Abilene, TX 79608 | Oil & Gas Operator | Feb 2003 |
| 626 | Plains Marketing & Trans Inc | Houston, TX 76002 | Oil & Gas Operator | Oct 1998 |
| 627 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 628 | Plenergy Dev LTD | | Oil & Gas Operator | Jun 2004 |
| 629 | Plummer Robert Layna Trust | Ralston, OK 74650 | Oil Operator | Jul 2018 |
| 630 | Post Oak Petroleum LLC | Skiatook, OK 74670 | Oil Operator | Jan 2025 |
| 631 | Powell James S | Cleveland, OK 74020 | Oil Operator | Jan 2025 |
| 632 | Presco Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2020 |
| 633 | Prime Energy Corp | Charleston, WV 25301-1707-1707 | Oil & Gas Operator | Sep 2015 |
| 634 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 635 | Pringle Operating Co. | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2015 |
| 636 | Producers Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2007 |
| 637 | Putnam Phyllis L | Bartlesville, OK 74006-7326 | Oil & Gas Operator | May 2021 |
| 638 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 639 | Quail Oil & Gas LC | Garden City, KS 67846 | Oil & Gas Operator | Jan 2025 |
| 640 | Quench Oil & Gas Inc | Plano, TX 75075-2902 | Oil & Gas Operator | Apr 2009 |
| 641 | R & N Oil Company | Fairfax, OK 74637 | Oil & Gas Operator | May 2013 |
| 642 | R & R Oil Company | Pampa, TX 79065 | Oil & Gas Operator | Jul 2002 |
| 643 | R & R Operating | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2004 |
| 644 | R B Energy, Inc | Manchester, KY 40962 | Oil & Gas Operator | Jan 2015 |
| 645 | R C Oil Company Inc | Nowata, OK 74048-3402 | Oil Operator | Nov 2021 |
| 646 | R D T Properties | Tulsa, OK 74105-7122 | Oil & Gas Operator | Sep 2017 |
| 647 | R L Turner Oil Company LLC | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 648 | Rainbow Oil & Gas | Pawhuska, OK 74056-0056 | Oil Operator | Oct 2010 |
| 649 | Rainbow Oil & Gas LLC | Coolville, OH 45723 | Oil & Gas Operator | Dec 2023 |
| 650 | Rainbow Oil Company | | Oil & Gas Operator | Aug 1999 |
| 651 | Rainbow Oilwell Service Inc | Depew, OK 74028 | Oil & Gas Operator | Jul 2024 |
| 652 | Ralph Dawson | | Oil Operator | Nov 2005 |
| 653 | Rampage Energy Inc | Bristow, OK 74010-6415 | Oil & Gas Operator | Apr 2020 |
| 654 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Apr 2025 |
| 655 | Red Creek Oil Co | | Oil & Gas Operator | Jun 1995 |
| 656 | Red Fork (USA) Investments Inc | Midland, TX 79710-0272 | Oil & Gas Operator | May 2019 |
| 657 | Redcord C R | Louisville, KY 40243 | Oil Operator | Jan 2025 |
| 658 | Redhen Oil Company | Oklahoma City, OK 73135 | Oil & Gas Operator | Sep 2024 |
| 659 | Reeves Harold D | | Oil & Gas Operator | Apr 1992 |
| 660 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Jan 2025 |
| 661 | Rennick Henry | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |
| 662 | Revard Oil & Gas Properties Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2025 |
| 663 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 664 | RM Oil & Gas Co | Pawhuska, OK 74056 | Oil Operator | Jul 1999 |
| 665 | Roadrunner Energy, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2015 |
| 666 | Robbins Thomas D & Charlene A Revocable Trust | Plano, TX 75093-7471 | Oil Operator | Jul 2018 |
| 667 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 668 | Robinowitz Oil Company | Tulsa, OK 74136-1429 | Oil & Gas Operator | Feb 2023 |
| 669 | Robinson Gary | Wynona, OK 74084 | Oil Operator | Dec 2024 |
| 670 | Rogers Jerry L | Cushing, OK 74023-0911 | Oil & Gas Operator | Mar 2017 |
| 671 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 672 | Rongey Oil | Jenks, OK 74037-3621 | Oil & Gas Operator | Jan 2013 |
| 673 | Rougeot Oil & Gas Corp | Sperry, OK 74073 | Oil & Gas Operator | Jan 2025 |
| 674 | Rountree Productions LLC | | Oil Operator | Jan 2025 |
| 675 | Royal Energy Resources LTD | Denver, CO 80221 | Oil & Gas Operator | May 2013 |
| 676 | Rozen H H | | Oil Operator | Aug 2022 |
| 677 | S & B Oil Company | Wyonna, OK 74084 | Oil & Gas Operator | Nov 2005 |
| 678 | S & J Oil | Hays, KS 67601 | Oil & Gas Operator | Jan 2025 |
| 679 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 680 | S & M Production Inc | Pawnee, OK 74058 | Oil & Gas Operator | Aug 2023 |
| 681 | S & S Oil | Ponca City, OK 74601 | Oil & Gas Operator | Dec 2009 |
| 682 | S & S Oil & Gas LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jul 2016 |
| 683 | Safire Resources LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2025 |
| 684 | Sallee Oil Corporation | Collinsville, OK 74021 | Oil & Gas Operator | Feb 2025 |
| 685 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 686 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 687 | Sand Boy Production Company | Bartlesville, OK 74003-9273 | Oil & Gas Operator | Jan 2025 |
| 688 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 689 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 690 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 691 | Schell Sam H | Barnsdall, OK 74002 | Oil & Gas Operator | Aug 1999 |
| 692 | Schroeder Donald C | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2025 |
| 693 | Schuler Jr Chris C | Cleveland, OK 74020 | Oil Operator | Aug 2013 |
| 694 | Schuler Oil Properties LLC | Cleveland, OK 74020 | Oil Operator | Feb 2025 |
| 695 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 696 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2009 |
| 697 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 698 | Selby Larry Monroe | Bartlesville, OK 74006 | Oil & Gas Operator | Apr 2020 |
| 699 | Sell Drilling Company | Pawhuska, OK 74056 | Oil Operator | Feb 2011 |
| 700 | Sell Oil Company | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |