| 601 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 602 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 603 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 604 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 605 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 606 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 607 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 608 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 609 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 610 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Feb 2024 |
| 611 | Piedra Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 612 | Pierce Production Company | Eunice, NM 88231 | Oil & Gas Operator | Oct 2012 |
| 613 | Pierce Production Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 614 | Pierce, Ray A. | Eunice, NM 88231 | Oil & Gas Operator | Nov 2004 |
| 615 | Pinnacle Mining Corporation | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 616 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2024 |
| 617 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Jan 2024 |
| 618 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 619 | Pioneer Natural Res. (GPC), Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1998 |
| 620 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 621 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 622 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 623 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 624 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 625 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 626 | Platform Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 627 | Platinum Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 628 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 629 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 630 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 631 | Polaris Production Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 632 | Prasad, Hari Production Co. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 633 | Premier Natural Resources, L.P. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2007 |
| 634 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 635 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 636 | Preston Exploration LLC | Spring, TX 77387 | Oil & Gas Operator | Dec 2014 |
| 637 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 638 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 639 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 640 | Primero Operating, Inc. | Roswell, NM 88202 | Oil & Gas Operator | Jun 2022 |
| 641 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 642 | Pringle Operating Co. | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2015 |
| 643 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 644 | Pro- Gas, Inc. | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 645 | Pronghorn Management Corporation | Hobbs, NM 88241 | Oil & Gas Operator | Apr 2024 |
| 646 | Prospctv Invstmnt & TRDG Co, LTD | Tulsa, OK 74170 | Oil & Gas Operator | May 2001 |
| 647 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 648 | Q Natural Resources, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 649 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2024 |
| 650 | QP, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 651 | Qualia, C. F. Operating,Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2013 |
| 652 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Jan 2024 |
| 653 | Quatro Oil And Gas, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 654 | Quay Valley, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2007 |
| 655 | Questa Oil & Gas Co. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 656 | Questar Expl. And Prod. Co. | Salt Lake Cty, UT 84145 | Oil & Gas Operator | Jul 2011 |
| 657 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 658 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2024 |
| 659 | R.K.G. Operations, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2004 |
| 660 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 661 | Ramtex Energy LLC | Tulsa, OK 74152 | Oil & Gas Operator | Apr 2024 |
| 662 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 663 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | Apr 2024 |
| 664 | Raptor Resources, Inc. | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 665 | Rasmussen, Hal J. Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 2009 |
| 666 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2024 |
| 667 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Apr 2024 |
| 668 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Apr 2024 |
| 669 | Rawls Oil Services | Andrews, TX 79714 | Oil Operator | Apr 2024 |
| 670 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 671 | Redco Oil & Gas, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Apr 2024 |
| 672 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Apr 2024 |
| 673 | Reliance Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 674 | Reliance Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 675 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 676 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |
| 677 | Resource Operating Company | Abilene, TX 79601 | Oil & Gas Operator | Jul 1997 |
| 678 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 679 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 680 | RGX Energy LLC | Plano, TX 75025 | Oil & Gas Operator | Oct 2019 |
| 681 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 682 | Richmond Drilling Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 683 | Rim Operating, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Apr 2024 |
| 684 | Ring Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 685 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 686 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 687 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 688 | Ronning Gas And Oil LLC | Mesa, AZ 85203 | Oil & Gas Operator | Apr 2024 |
| 689 | Rover Petroleum Operating, LLC | Plano, TX 75075 | Oil & Gas Operator | Apr 2024 |
| 690 | Royale Operating Company | San Diego, CA 92108 | Oil & Gas Operator | Apr 1996 |
| 691 | RSP Permian, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2018 |
| 692 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 693 | Rust Oil Corp. | Fort Worth, TX 76108 | Oil & Gas Operator | Apr 2024 |
| 694 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 695 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 696 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Apr 2024 |
| 697 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 698 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 699 | Saber Oil & Gas Ventures, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 700 | Saber Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2008 |