| 701 | RTZ Energy, LLC | Kilgore, TX 75663 | Gas Operator | Apr 2006 |
| 702 | Rubicon Energy, L.L.C. | Arlington, TX 76006 | Oil & Gas Operator | Sep 1999 |
| 703 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 704 | Rubis Oil, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 705 | Ruby Operating Company, Inc | Clyde, TX 79510 | Oil & Gas Operator | Feb 2026 |
| 706 | Rucker, Gary | Archer City, TX 76351 | Oil & Gas Operator | Dec 2003 |
| 707 | Ruckus Energy Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Feb 2026 |
| 708 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 709 | Ruff | Albany, TX 76430 | Oil & Gas Operator | Aug 2017 |
| 710 | Ruff Drilling Company | Albany, TX 76430 | Oil & Gas Operator | Dec 2019 |
| 711 | Ruff Oil Co. | Albany, TX 76430 | Oil Operator | Feb 2026 |
| 712 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Feb 2026 |
| 713 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 714 | Running WP Oil, LLC | Loving, TX 76460 | Oil Operator | Feb 2026 |
| 715 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Feb 2026 |
| 716 | Rush, Charles Ray | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 717 | Rushing Oil Co. | San Antonio, TX 78213 | Oil & Gas Operator | Feb 2026 |
| 718 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 719 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 720 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Feb 2026 |
| 721 | Rusk Production Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 2026 |
| 722 | Russell - FT. Trinidad Op., LLC | Tyler, TX 75710 | Oil & Gas Operator | Feb 2026 |
| 723 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 724 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 725 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Feb 2026 |
| 726 | Russell, C. M. Oil Company | Lubbock, TX 79423 | Oil & Gas Operator | Jan 2008 |
| 727 | Russell, L. J. Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Feb 2026 |
| 728 | Russell, Phillip | Colorado City, TX 79512 | Oil & Gas Operator | Feb 2026 |
| 729 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 730 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Feb 2026 |
| 731 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 732 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 733 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 734 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 735 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Feb 2026 |
| 736 | Rutledge, Kenny | Rising Star, TX 76471 | Oil & Gas Operator | Feb 2026 |
| 737 | Rutledge, Rome | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1997 |
| 738 | Rutledge-Newsom | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 739 | Rutta, Jim | Columbus, TX 78934 | Oil & Gas Operator | Dec 1995 |
| 740 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 741 | RVR Operating Co. | Bedford, TX 76021 | Oil & Gas Operator | Jan 2017 |
| 742 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 743 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 744 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Feb 2026 |
| 745 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 746 | RWS Operating Co. LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 747 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 748 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Feb 2026 |
| 749 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 750 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 751 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Feb 2026 |
| 752 | Rystin Oil & Gas | Sugar Land, TX 77487 | Oil & Gas Operator | Feb 2026 |