| 1 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Feb 2025 |
| 2 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 3 | S & S Star Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 4 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 2025 |
| 5 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 6 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 7 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 8 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 9 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Mar 2025 |
| 10 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2025 |
| 11 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jun 2025 |
| 12 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 13 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 14 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 15 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 16 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 17 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 18 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 19 | Scissortail Exploration And Production LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 20 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jun 2025 |
| 21 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 22 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 23 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 24 | Sears M N | Oklahoma City, OK 73143 | Oil & Gas Operator | Apr 2015 |
| 25 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 26 | Shawver & Son Inc | Oklahoma City, OK 73154-0778 | Oil & Gas Operator | Oct 2024 |
| 27 | Shawver Energy Inc | Oklahoma City, OK 73154-0683 | Oil & Gas Operator | Apr 2014 |
| 28 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 29 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 30 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Mar 2025 |
| 31 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 32 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jun 2025 |
| 33 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 34 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 35 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2025 |
| 36 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 37 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 38 | Sloan Petroleum Service Inc | Guthrie, OK 73044 | Oil & Gas Operator | Mar 2025 |
| 39 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 40 | Smith VIcki L Palmer | Lawton, OK 73505-1701 | Oil & Gas Operator | Dec 2014 |
| 41 | Smith-Clement Exploration Inc | Edmond, OK 73013 | Oil Operator | Jul 1997 |
| 42 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 43 | Song Production Company | Lindsay, OK 73052-0369 | Oil & Gas Operator | Jun 2015 |
| 44 | Sooner Oilfield Services Inc | Piedmont, OK 73078-0810 | Oil & Gas Operator | May 2024 |
| 45 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 46 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 47 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Mar 2025 |
| 48 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 49 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 50 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Jun 2025 |
| 51 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Mar 2025 |
| 52 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 53 | St Joe Petroleum U S Corp | | Oil & Gas Operator | Aug 2000 |
| 54 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 55 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 56 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 57 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Mar 2025 |
| 58 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 59 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 60 | State Oil Company | | Oil & Gas Operator | Mar 2006 |
| 61 | Stauros Operating Company | Edmond, OK 73083-2707 | Oil & Gas Operator | Mar 2001 |
| 62 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Mar 2025 |
| 63 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 2025 |
| 64 | Stover Oil Company | Konawa, OK 74849-0216 | Oil & Gas Operator | Jul 2002 |
| 65 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 66 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 67 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | Mar 2025 |
| 68 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | Mar 2025 |
| 69 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 70 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 71 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jun 2025 |
| 72 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 73 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Feb 2025 |
| 74 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 75 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |