| 601 | Red Sand Resources LLC | Ada, OK 74821 | Oil Operator | Apr 2026 |
| 602 | Red Sands Energy, LLC | | Oil & Gas Operator | Apr 2017 |
| 603 | Red Shell Inc | Dale, TX 78616 | Oil & Gas Operator | Jul 2026 |
| 604 | Red Stag Energy, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jan 2022 |
| 605 | Red Stag Operating, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jul 2026 |
| 606 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 607 | Red Tail Exploration, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 608 | Red Tail Properties, LLC | Tulsa, OK 74107-3443 | Oil Operator | Apr 2026 |
| 609 | Red Tank Resources, LLC | Dallas, TX 75379 | Oil & Gas Operator | Jul 2026 |
| 610 | Red Tiger Oil & Gas LLC | Gillette, WY 82718 | Oil & Gas Operator | May 2026 |
| 611 | Red Valley Resources LLC | McCordsville, IN 46055-0294 | Oil Operator | Dec 2015 |
| 612 | Red Water Resources, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Jul 2026 |
| 613 | Red Willow Mid-Continent, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2009 |
| 614 | Red Willow Offshore, LLC | | Oil & Gas Operator | Apr 2011 |
| 615 | Red Willow Production Company | | Oil & Gas Operator | Apr 2026 |
| 616 | Red Willow Production, LLC | Ignacio, CO 81137 | Oil & Gas Operator | Oct 2015 |
| 617 | Red Wing Oil & Gas, Inc. | | Oil Operator | Sep 1990 |
| 618 | Red Wolf Oil Company, Inc. | Brenham, TX 77833 | Oil & Gas Operator | Jul 2026 |
| 619 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | May 2026 |
| 620 | Red-Tex Energy Services, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2000 |
| 621 | Red-Tex Petroleum, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Aug 2003 |
| 622 | Redbank Oil Co. | | Oil Operator | Dec 2025 |
| 623 | Redbank Oil Co. Operator | | Oil Operator | Dec 2025 |
| 624 | Redbird Oil Company | Bartlesville, OK 74005-2566 | Oil & Gas Operator | Mar 2015 |
| 625 | Redbird Oilfield Services Corp. | Spring, TX 77386 | Oil & Gas Operator | Jul 2026 |
| 626 | Redboot Production, Inc | Stafford, KS 67578 | Gas Operator | Jan 2017 |
| 627 | Redbud E & P, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 2026 |
| 628 | Redbud Oil & Gas | Nowata, OK 74048-0026 | Oil & Gas Operator | Dec 2000 |
| 629 | Redbud Oil & Gas Operating, LLC | Spring, TX 77379 | Oil & Gas Operator | Mar 2026 |
| 630 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Apr 2026 |
| 631 | Redco Oil & Gas, Inc. | Ledbetter, TX 78946 | Oil & Gas Operator | Jul 2026 |
| 632 | Redco, Inc. | Columbus, OH 43229 | Oil & Gas Operator | Dec 1998 |
| 633 | Redd Production Of Mansfield | | Oil & Gas Operator | Jan 1991 |
| 634 | Reddig Enterprises Inc. | Gorham, KS 67640 | Oil Operator | Feb 2026 |
| 635 | Redding, Bobby L. | Three Rivers, TX 78071 | Oil & Gas Operator | Mar 2004 |
| 636 | Reddirt Operating, LLC. | Midland, TX 79710 | Oil & Gas Operator | Jul 2026 |
| 637 | Reddy Disposals, LLC | Beeville, TX 78104 | Oil Operator | Jul 2026 |
| 638 | Reddy Oil & Gas Corporation | Tulsa, OK 74108 | Oil & Gas Operator | Apr 2026 |
| 639 | Redemption Oil & Gas, LLC | San Antonio, TX 78232 | Oil & Gas Operator | Jul 2024 |
| 640 | Redfish Bay Operating Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 1998 |
| 641 | Redfork Operations LLC | Dover, OK 73734 | Oil & Gas Operator | May 2026 |
| 642 | Redgate Petroleum Inc | Waynoka, OK 73860-9408 | Oil & Gas Operator | Mar 2014 |
| 643 | Redhen Oil Company | Oklahoma City, OK 73135 | Oil & Gas Operator | Sep 2024 |
| 644 | Redhill Operating LLC | Duncan, OK 73533 | Oil & Gas Operator | Apr 2026 |
| 645 | Redhorn Resources, LLC | Magnolia, TX 77354 | Oil Operator | Jul 2026 |
| 646 | Redland Development LLC | Cashion, OK 73016-9625 | Oil & Gas Operator | May 2019 |
| 647 | Redland Resources LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | May 2026 |
| 648 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | May 2026 |
| 649 | Redman E C /Redman Oil Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 2002 |
| 650 | Redman Operating Company | Houston, TX 77042 | Oil & Gas Operator | May 2008 |
| 651 | Redman Operating Company LLC | Nocona, TX 76255 | Oil Operator | Jul 2026 |
| 652 | Redmill Drilling | Kittanning, PA 16201-7123 | Oil & Gas Operator | Apr 2026 |
| 653 | Redmon Oil Company, Inc., The | Plano, TX 75023 | Oil & Gas Operator | Jul 2026 |
| 654 | Redneck Oil & Gas LLC | Cushing, OK 74023 | Oil Operator | Apr 2026 |
| 655 | Rednet Exploration LLC | Nashport, OH 43830 | Oil Operator | Dec 2025 |
| 656 | Redstone Gas Partners LLC | Denver, CO 80202 | Gas Operator | Mar 2001 |
| 657 | Redstone Oil & G | | Oil Operator | Sep 1989 |
| 658 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 659 | Redstone Operating, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 2015 |
| 660 | Redstone Resources Inc | Newcastle, WY 82701 | Gas Operator | Dec 2010 |
| 661 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | May 2026 |
| 662 | Redwine Oil Company | Throckmorton, TX 76483 | Oil & Gas Operator | Jul 2009 |
| 663 | Redwine Resources Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2015 |
| 664 | Redwolf Production Inc | Farmington, NM 87499 | Oil & Gas Operator | Feb 2026 |
| 665 | Redwood Energy Production, L.P. | San Francisco, CA 94104 | Gas Operator | Aug 2025 |
| 666 | Redwood Energy, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 1997 |
| 667 | Redwood Oil & Gas | McKinney, TX 75070 | Oil & Gas Operator | Apr 2013 |
| 668 | Redwood Operating LLC | Artesia, NM 88210 | Oil & Gas Operator | Dec 2023 |
| 669 | Redwood Operating, Inc. | Houston, TX 77058 | Oil & Gas Operator | Jul 2026 |
| 670 | Reed Exploration LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 671 | Reed Gas Inc. | Charleston, WV 25301-0000 | Oil & Gas Operator | Dec 2021 |
| 672 | Reed Gas Joint Venture | Charleston, WV 25302-0000 | Gas Operator | Oct 2021 |
| 673 | Reed Kenneth E | Burbank, OH 44214 | Oil & Gas Operator | Dec 1993 |
| 674 | Reed Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Jun 2005 |
| 675 | Reed Oil, LLC | Louisburg, KS 66053 | Oil Operator | Mar 2026 |
| 676 | Reed Power Tongs Inc | Seminole, OK 74818 | Oil & Gas Operator | Apr 2026 |
| 677 | Reed Production, Inc. | Gainesville, TX 76241 | Oil Operator | Jul 2026 |
| 678 | Reed Richard L | Shawnee, OK 74802-1462 | Oil Operator | Nov 1993 |
| 679 | Reed, George A. | Wichita, KS 67202 | Oil & Gas Operator | Dec 2009 |
| 680 | Reed, Trace | Bridgeport, TX 76426 | Oil & Gas Operator | Jul 2026 |
| 681 | Reeder Energy Operating LLC | Dallas, TX 75206-4085 | Oil & Gas Operator | Dec 2021 |
| 682 | Reeder Production | | Oil Operator | Oct 2005 |
| 683 | Reeder, Wendell A. | Kilgore, TX 75663 | Oil Operator | Jul 2013 |
| 684 | Reef Exploration Corporation | Richardson, TX 75080 | Oil Operator | Sep 2019 |
| 685 | Reef Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2007 |
| 686 | Reef Exploration, Inc. (A-1) | Richardson, TX 75080 | Oil & Gas Operator | Oct 2006 |
| 687 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2026 |
| 688 | Reef Operating, Inc. | Hays, KS 67601 | Oil Operator | Mar 2026 |
| 689 | Reef Petroleum Corp | | Oil & Gas Operator | Feb 1994 |
| 690 | Reef Ridge Energy Company LLC | | Oil & Gas Operator | May 2026 |
| 691 | Reefworks LLC | | Oil & Gas Operator | Apr 2026 |
| 692 | Reese Energy Corp. | | Oil & Gas Operator | Oct 1991 |
| 693 | Reese Exploratio | | Oil & Gas Operator | Mar 1995 |
| 694 | Reese Oil & Gas LTD | | Oil & Gas Operator | Sep 1991 |
| 695 | Reese Oil And Gas Company | | Oil & Gas Operator | Mar 1985 |
| 696 | Reese Oil Company | Raytown, MO 64133 | Oil Operator | Jan 1999 |
| 697 | Reese Wellsite Supervision, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 698 | Reeves County Systems, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Aug 2019 |
| 699 | Reeves Harold D | | Oil & Gas Operator | Apr 1992 |
| 700 | Reeves Prod. Co. | | Oil & Gas Operator | Mar 1989 |