| 701 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 702 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 703 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 704 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 705 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 706 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 707 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 708 | Sho-Bar Energy, Inc. | Harper, KS 67058 | Oil & Gas Operator | Feb 2025 |
| 709 | Shortgrass Petroleum Inc | Laverne, OK 73848-0139 | Oil & Gas Operator | Feb 2025 |
| 710 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 711 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 712 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 713 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 714 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 715 | Smokey Trail LLC | Thornton, CO 80241 | Oil & Gas Operator | Mar 2025 |
| 716 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 717 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 718 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 719 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Mar 2025 |
| 720 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 721 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 722 | South Forty, The, Inc. | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 723 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Feb 2025 |
| 724 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 725 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 726 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 727 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 728 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2025 |
| 729 | Spencer Oil Company LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2015 |
| 730 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Mar 2025 |
| 731 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 732 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 733 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 734 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 735 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Feb 2025 |
| 736 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 737 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 738 | Statex Operating, LLC | Dallas, TX 75229 | Oil & Gas Operator | Mar 2007 |
| 739 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 740 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 741 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Mar 2025 |
| 742 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2025 |
| 743 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 744 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 2025 |
| 745 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 746 | Stromquist C Dale | Liberal, KS 67901-2428 | Oil & Gas Operator | Jun 2006 |
| 747 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 748 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 749 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 750 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jan 2025 |
| 751 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 752 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 753 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Feb 2025 |
| 754 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 755 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 756 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 757 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | May 2025 |
| 758 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 759 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 760 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 761 | Tapstone Energy LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Mar 2025 |
| 762 | Taylor R C Companies Inc | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | May 2021 |
| 763 | Tbi Exploration Inc | Englewood, CO 801556525 | Oil & Gas Operator | Jun 2011 |
| 764 | Te-Ray Energy, Inc. | Oklahoma City, OK 73108 | Oil & Gas Operator | Feb 2025 |
| 765 | Te-Ray Resources, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 766 | Technical Energy Services, Inc. | Norman, OK 73070 | Oil & Gas Operator | Feb 2025 |
| 767 | Tekenergy, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 768 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | May 2025 |
| 769 | Tenneco Oil Company | Oklahoma City, OK 73125 | Oil & Gas Operator | Feb 2025 |
| 770 | Tex-Ok Energy LP | Cody, WY 82414 | Oil & Gas Operator | Mar 2025 |
| 771 | Tex-Star Production | Dallas, TX 75206 | Oil & Gas Operator | Mar 2025 |
| 772 | Tex/Con Oil & Gas Company | Houston, TX 77074 | Oil & Gas Operator | Feb 2001 |
| 773 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Mar 2025 |
| 774 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 775 | Texakoma Operating, L.P. | Plano, TX 75024 | Oil & Gas Operator | Jan 2025 |
| 776 | Texas Energies, Inc. | Pratt, KS 67124 | Oil & Gas Operator | Aug 1998 |
| 777 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 778 | Texinia Corp | Dallas, TX 75201 | Oil & Gas Operator | Jun 2015 |
| 779 | Texocan Minerals Inc | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2000 |
| 780 | The Calvert Company | Oklahoma City, OK 73154-1589 | Oil & Gas Operator | Dec 2021 |
| 781 | The Quintin Little Company Inc | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2025 |
| 782 | Thomas J L Engineering Inc | Edmond, OK 73003-0026 | Oil & Gas Operator | Jul 2016 |
| 783 | Thompson Operating Co. | Abernathy, TX 79311 | Oil & Gas Operator | Aug 1994 |
| 784 | Thompson Roy G | Bartlesville, OK 74006 | Oil & Gas Operator | Feb 1993 |
| 785 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 786 | Tidemark Exploration | Tulsa, OK 74170 | Oil & Gas Operator | May 2005 |
| 787 | Titan Resources LTD | Limaville, OH 44640 | Oil & Gas Operator | Mar 2025 |
| 788 | TK Drilling Corp. | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2025 |
| 789 | Toklan Oil And Gas Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 790 | Tomlinson Oil Co. Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Jan 2025 |
| 791 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 792 | Totalfinaelf E&P USA Inc | Houston, TX 77024 | Oil & Gas Operator | Jul 2007 |
| 793 | Trailhead Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 794 | Transok LLC | Oklahoma City, OK 73124-0300 | Oil & Gas Operator | Jul 2020 |
| 795 | Trek Resources, Inc. | Dallas, TX 75207 | Oil & Gas Operator | May 2025 |
| 796 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Mar 2025 |
| 797 | Tripower Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2020 |
| 798 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 799 | Triumph Resources Inc | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2004 |
| 800 | Trueblood Resources, Inc. | Denver, CO 80222 | Oil & Gas Operator | May 2025 |