| 1 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Apr 2025 |
| 2 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 3 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 4 | Salty Dog Disposal LLC | Cement, OK 73017 | Oil Operator | May 2025 |
| 5 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 6 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 7 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 8 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Jun 2025 |
| 9 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Jul 2025 |
| 10 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jul 2025 |
| 11 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 12 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 13 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |
| 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 | Saucier Oil & Gas LLC | Cement, OK 73017 | Oil Operator | Apr 2025 |
| 17 | Saylor Weldon W | Tulsa, OK 74105-5325 | Gas Operator | Dec 1994 |
| 18 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 19 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 20 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 21 | Scott Petroleum, Inc. | Dallas, TX 75244 | Oil & Gas Operator | May 1995 |
| 22 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 23 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 24 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 25 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 26 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 27 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 28 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 29 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 30 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 31 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 2025 |
| 32 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 33 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2025 |
| 34 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 35 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 36 | Sloan Petroleum Service Inc | Guthrie, OK 73044 | Oil & Gas Operator | May 2025 |
| 37 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jul 2025 |
| 38 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 39 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 40 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 41 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | May 2025 |
| 42 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | May 2025 |
| 43 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2025 |
| 44 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | May 2025 |
| 45 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 46 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | May 2025 |
| 47 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 48 | Star Oil Company | Wichita, KS 67230 | Oil & Gas Operator | Mar 2025 |
| 49 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | May 2025 |
| 50 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 51 | Sting Exploration Company | Tulsa, OK 74120 | Oil Operator | Sep 2004 |
| 52 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2025 |
| 53 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | May 2025 |
| 54 | Stricker Resources Inc | Morris, OK 74445 | Oil & Gas Operator | Apr 2025 |
| 55 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | May 2025 |
| 56 | Struck Rock Oil And Gas LLC | Geary, OK 73040 | Oil & Gas Operator | Apr 2025 |
| 57 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jul 2025 |
| 58 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 59 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | May 2025 |
| 60 | Swan Oil Co | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 61 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Apr 2025 |
| 62 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 63 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |