| 701 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Jun 2026 |
| 702 | Roberson, Joe | Vernon, TX 76385 | Oil & Gas Operator | Feb 2015 |
| 703 | Rodman Petroleum Corp. | Odessa, TX 79768 | Oil & Gas Operator | Jul 2023 |
| 704 | Roe Oil Company | Cushing, OK 74023-0086 | Oil & Gas Operator | Nov 2025 |
| 705 | Roka Management Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | May 2026 |
| 706 | Roka Resources Inc | Oklahoma City, OK 73139 | Oil & Gas Operator | May 2026 |
| 707 | Ron & Dan'S Oil LTD | Barnsdall, OK 74002-0628 | Oil & Gas Operator | May 2011 |
| 708 | Rose Petroleum Corp | Oklahoma City, OK 73146 | Oil & Gas Operator | Feb 2015 |
| 709 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jun 2026 |
| 710 | RR Oil Well Operations LLC | Ringwood, OK 73768 | Oil & Gas Operator | Jun 2026 |
| 711 | RTB Oil Inc | Crescent, OK 73028-0686 | Oil Operator | May 2016 |
| 712 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | May 2026 |
| 713 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Sep 2026 |
| 714 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Jun 2026 |
| 715 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 716 | S A C Operating Inc | Woodward, OK 73802-1749 | Oil & Gas Operator | Jan 1999 |
| 717 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 718 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 719 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 720 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | May 2026 |
| 721 | Sandra Turner Dba Grand Lake Resources | Hennessey, OK 73742 | Oil & Gas Operator | May 2026 |
| 722 | Sandrock Energy LLC | Luther, OK 73054 | Oil & Gas Operator | May 2026 |
| 723 | Sandstone Resources, Inc. | Houston, TX 77043 | Oil & Gas Operator | Sep 2026 |
| 724 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 725 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 726 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 727 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 728 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 729 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Sep 2026 |
| 730 | Schroeder, Donald C | | Oil & Gas Operator | May 2026 |
| 731 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | May 2026 |
| 732 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 733 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 734 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | May 2026 |
| 735 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 736 | Serendipity Operating LLC | Sparks, NV 89436-9328 | Oil & Gas Operator | Apr 2026 |
| 737 | Serendipity Production Company LC | Guthrie, OK 73044 | Oil & Gas Operator | Apr 2020 |
| 738 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 739 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 740 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Jun 2026 |
| 741 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 742 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 743 | Shawver & Son Inc | Oklahoma City, OK 73154-0778 | Oil & Gas Operator | Dec 2025 |
| 744 | Shawver Energy Inc | Oklahoma City, OK 73154-0683 | Oil & Gas Operator | Apr 2014 |
| 745 | Shelly Energy Inc | Berwyn, PA 19312 | Oil & Gas Operator | Jun 2026 |
| 746 | Sherman Larry Oil Company | Chandler, OK 74834 | Oil & Gas Operator | Mar 2015 |
| 747 | Sherman Oil & Gas Co Inc | Chandler, OK 74834-0571 | Oil & Gas Operator | Apr 2020 |
| 748 | Shields Energy Inc | Fort Smith, AR 72901-4607 | Oil & Gas Operator | May 2026 |
| 749 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 750 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 751 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2026 |
| 752 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 753 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 754 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Jun 2026 |
| 755 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 756 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Jun 2026 |
| 757 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2026 |
| 758 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Apr 2026 |
| 759 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 760 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 761 | Smith Resources, L.L.C. | Marshall, TX 75671 | Oil & Gas Operator | Sep 2026 |
| 762 | Smith Terry | Wewoka, OK 74884 | Oil & Gas Operator | Mar 2015 |
| 763 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2026 |
| 764 | Snuffy'S Oilfield Service Inc | Hennessey, OK 73742-6511 | Oil & Gas Operator | Nov 2014 |
| 765 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 766 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 767 | Sooner Acquisition Corp | Wichita, KS 67206 | Oil & Gas Operator | Sep 1993 |
| 768 | Sooner Crude Inc | Tulsa, OK 74136-9107 | Oil & Gas Operator | Sep 2008 |
| 769 | Sooner Oil & Gas Management Inc | Crescent, OK 73928 | Oil & Gas Operator | May 2026 |
| 770 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 771 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 772 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 773 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 774 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 775 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 776 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | May 2026 |
| 777 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 778 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 779 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Sep 2026 |
| 780 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2026 |
| 781 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jun 2026 |
| 782 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Jun 2026 |
| 783 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Jun 2026 |
| 784 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 785 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | May 2026 |
| 786 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jun 2026 |
| 787 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 788 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 789 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 790 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 791 | Stephens Energy Group LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2026 |
| 792 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jun 2026 |
| 793 | Stevens Quincy O | Oklahoma City, OK 73116-4102 | Oil & Gas Operator | Dec 2019 |
| 794 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 795 | Still A B Wel-Service Inc | Drumright, OK 74030-0787 | Oil & Gas Operator | Jul 2019 |
| 796 | Still Alex B Estate Of | Sagle, ID 83860-0644 | Oil & Gas Operator | Nov 2018 |
| 797 | Stillwater Oil & Gas | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 798 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Sep 2026 |
| 799 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 800 | Strike Energy Corp | Blackwell, OK 74631 | Oil & Gas Operator | Jul 2023 |