| 1 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Nov 2025 |
| 2 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 3 | S A C Operating Inc | Woodward, OK 73802-1749 | Oil & Gas Operator | Jan 1999 |
| 4 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 5 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 6 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 7 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Nov 2025 |
| 8 | Sandra Turner Dba Grand Lake Resources | Hennessey, OK 73742 | Oil & Gas Operator | Nov 2025 |
| 9 | Sandrock Energy LLC | Luther, OK 73054 | Oil & Gas Operator | Nov 2025 |
| 10 | Sandstone Resources, Inc. | Houston, TX 77043 | Oil & Gas Operator | Feb 2026 |
| 11 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 12 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 13 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 14 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 15 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 16 | Savage Exploration, Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Feb 2026 |
| 17 | Schroeder, Donald C | | Oil & Gas Operator | Aug 2025 |
| 18 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | Nov 2025 |
| 19 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 20 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 21 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Nov 2025 |
| 22 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 23 | Serendipity Operating LLC | Sparks, NV 89436-9328 | Oil & Gas Operator | Nov 2025 |
| 24 | Serendipity Production Company LC | Guthrie, OK 73044 | Oil & Gas Operator | Apr 2020 |
| 25 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 26 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 27 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Dec 2025 |
| 28 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 29 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 30 | Shawver & Son Inc | Oklahoma City, OK 73154-0778 | Oil & Gas Operator | Oct 2024 |
| 31 | Shawver Energy Inc | Oklahoma City, OK 73154-0683 | Oil & Gas Operator | Apr 2014 |
| 32 | Shelly Energy Inc | Berwyn, PA 19312 | Oil & Gas Operator | Dec 2025 |
| 33 | Sherman Larry Oil Company | Chandler, OK 74834 | Oil & Gas Operator | Mar 2015 |
| 34 | Sherman Oil & Gas Co Inc | Chandler, OK 74834-0571 | Oil & Gas Operator | Apr 2020 |
| 35 | Shields Energy Inc | Fort Smith, AR 72901-4607 | Oil & Gas Operator | Nov 2025 |
| 36 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 37 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 38 | Shipley Energy Corporation | | Oil & Gas Operator | May 1991 |
| 39 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Nov 2025 |
| 40 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 41 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 42 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Nov 2025 |
| 43 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2025 |
| 44 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Oct 2025 |
| 45 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 46 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Oct 2025 |
| 47 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 48 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2026 |
| 49 | Smith Resources, L.L.C. | Marshall, TX 75671 | Oil & Gas Operator | Feb 2026 |
| 50 | Smith Terry | Wewoka, OK 74884 | Oil & Gas Operator | Mar 2015 |
| 51 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Feb 2026 |
| 52 | Snuffy'S Oilfield Service Inc | Hennessey, OK 73742-6511 | Oil & Gas Operator | Nov 2014 |
| 53 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 54 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 55 | Sooner Acquisition Corp | Wichita, KS 67206 | Oil & Gas Operator | Sep 1993 |
| 56 | Sooner Crude Inc | Tulsa, OK 74136-9107 | Oil & Gas Operator | Sep 2008 |
| 57 | Sooner Oil & Gas Management Inc | Crescent, OK 73028 | Oil & Gas Operator | Dec 2025 |
| 58 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 59 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 60 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 61 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 62 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 63 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 64 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Nov 2025 |
| 65 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 66 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 67 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2026 |
| 68 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 69 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Dec 2025 |
| 70 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Dec 2025 |
| 71 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Dec 2025 |
| 72 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 73 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2025 |
| 74 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Dec 2025 |
| 75 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 76 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 77 | Stargas Co | Tulsa, OK 74136-5407 | Oil & Gas Operator | Aug 2013 |
| 78 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 79 | Stephens Energy Group LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2025 |
| 80 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2025 |
| 81 | Stevens Quincy O | Oklahoma City, OK 73116-4102 | Oil & Gas Operator | Dec 2019 |
| 82 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 83 | Still A B Wel-Service Inc | Drumright, OK 74030-0787 | Oil & Gas Operator | Jul 2019 |
| 84 | Still Alex B Estate Of | Sagle, ID 83860-0644 | Oil & Gas Operator | Nov 2018 |
| 85 | Stillwater Oil & Gas | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 86 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 87 | STP Cherokee Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2014 |
| 88 | Strike Energy Corporation | Blackwell, OK 74631 | Oil & Gas Operator | Jul 2023 |
| 89 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 90 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 91 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 92 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 93 | Sundance Energy Oklahoma LLC Dba Seo LLC | Denver, CO 80202-3620 | Oil & Gas Operator | Nov 2021 |
| 94 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 95 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 96 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 97 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 98 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 99 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Nov 2025 |
| 100 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |