| 701 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | Dec 2025 |
| 702 | Retamco Operating Inc | Red Lodge, MT 59068 | Oil & Gas Operator | Sep 2025 |
| 703 | Reynolds, E. P., Jr. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 704 | Rhodes Disposal, Inc. | Bryson, TX 76427 | Oil Operator | Dec 2025 |
| 705 | Ric Petroleum, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2003 |
| 706 | Richards, Michael Dewain | Graham, TX 76450 | Oil & Gas Operator | Apr 2011 |
| 707 | Richards, Tot Oil Co. | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |
| 708 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Dec 2025 |
| 709 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 710 | Ridge Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 711 | Riggs Petroleum Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 712 | Rio Bravo Production, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 713 | Rio Grande Drilling Company | San Antonio, TX 78212 | Oil & Gas Operator | Dec 1999 |
| 714 | Ritter, Laber & Associates, Inc. | Williston, ND 58802 | Oil & Gas Operator | Aug 2025 |
| 715 | Rivercity Operating, Inc. | Austin, TX 78766 | Oil & Gas Operator | Dec 2025 |
| 716 | RMR Oil Company | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2005 |
| 717 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Dec 2025 |
| 718 | Robinson Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 719 | Robuck Petroleum, LLC | Nacogdoches, TX 75965 | Oil & Gas Operator | Dec 2025 |
| 720 | Rocking, R, Drilling & Prod Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2025 |
| 721 | Rockwood Resources Inc | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 722 | Rodgers, William L. | Fort Worth, TX 76147 | Oil & Gas Operator | Jan 1995 |
| 723 | Rog Enterprises, Inc. | Lake Dallas, TX 75065 | Oil Operator | May 2014 |
| 724 | Rog Enterprises, LLC | Burkburnett, TX 76354 | Oil Operator | Dec 2025 |
| 725 | Rogers Drilling Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 726 | Romac Oil Company, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Dec 2025 |
| 727 | Rover Operating Company, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 728 | Royal Oil LTD. Co. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 1996 |
| 729 | Running WP Oil, LLC | Loving, TX 76460 | Oil Operator | Dec 2025 |
| 730 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Dec 2025 |
| 731 | Rush, Charles Ray | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 732 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2025 |
| 733 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Dec 2025 |
| 734 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Dec 2025 |
| 735 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 736 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 737 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 738 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 739 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 740 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 741 | Safari Resources, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 742 | Salient Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 743 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 744 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 745 | SBG Resources Group LLC | Frisco, TX 75035 | Oil Operator | Dec 2025 |
| 746 | SBS Oil Company | Austin, TX 78749 | Oil & Gas Operator | Dec 2025 |
| 747 | Scan Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 748 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 749 | Scheriger Production | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 750 | Schlittler, Willard | Bryson, TX 76427 | Oil & Gas Operator | Dec 2025 |
| 751 | Scott, Stephen | Olney, TX 76374 | Oil Operator | Oct 2011 |
| 752 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 753 | Seattle'S Best Consulting LLC | Austin, TX 78731 | Oil & Gas Operator | Dec 2025 |
| 754 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 755 | Seisma Drilling Corporation | Wichita Falls, TX 76301 | Oil Operator | Aug 2003 |
| 756 | Senkel, Wesley, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2007 |
| 757 | Shamrock Minerals Corporation | Merkel, TX 79536 | Oil & Gas Operator | Nov 1998 |
| 758 | Shanafelt Oil Operating, LLC | Jacksboro, TX 76458 | Oil Operator | Dec 2025 |
| 759 | Shanafelt, Arthur | Jacksboro, TX 76458 | Oil & Gas Operator | May 2003 |
| 760 | Shanks, Bob | Haskell, OK 74436 | Oil Operator | Sep 2002 |
| 761 | Shearer Oil Company | Graham, TX 76450 | Oil & Gas Operator | May 2002 |
| 762 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 763 | Shoshone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | May 1994 |
| 764 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 765 | Sierra Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2008 |
| 766 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Dec 2025 |
| 767 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 768 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Sep 2025 |
| 769 | Simmons, Stanley J. | Olney, TX 76374 | Oil & Gas Operator | Aug 1994 |
| 770 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 771 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 772 | Skinner, W. E. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 773 | SKS Oil | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 774 | Sky Development Corporation | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 775 | Sky Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 776 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 777 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 778 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 779 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 780 | Smith, David | Wichita Falls, TX 76310 | Oil Operator | Dec 2025 |
| 781 | Smith, E. J. | Fort Worth, TX 76137 | Oil & Gas Operator | Dec 2025 |
| 782 | Snyder Drilling Corp. | Albany, TX 76430 | Oil & Gas Operator | Dec 2025 |
| 783 | Southern Alliance Oil Corp. | Grapevine, TX 76099 | Oil & Gas Operator | Dec 2025 |
| 784 | Southlake Exploration, Inc. | Southlake, TX 76092 | Oil & Gas Operator | Dec 2025 |
| 785 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Dec 2025 |
| 786 | SPH Development, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2022 |
| 787 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Dec 2025 |
| 788 | Spivey, R. L. | Olney, TX 76374 | Oil Operator | Jul 2005 |
| 789 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 790 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 791 | Sta-Kel Incorporated | Graham, TX 76450 | Oil & Gas Operator | Dec 2000 |
| 792 | Stagg Investment Group, Inc. | Midland, TX 79701 | Oil Operator | May 2013 |
| 793 | Stamper Operating Co., Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 794 | Steele, Mark E. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 795 | Steinberger, D. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 1995 |
| 796 | Steinberger, Gerald | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2007 |
| 797 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 798 | Stevens & Tull, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2000 |
| 799 | Stewart Construction | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 800 | Stewart, James G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2019 |