| 1 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 2 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jun 2025 |
| 3 | S & S Star Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 4 | S & T SWD LLC | Clinton, OK 73601-3130 | Oil Operator | Feb 2017 |
| 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 | Mar 2025 |
| 8 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Mar 2025 |
| 9 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 10 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 11 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |
| 12 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 13 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 14 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Jun 2025 |
| 15 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 16 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 17 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2025 |
| 18 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 19 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 20 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 21 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 22 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 23 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Mar 2025 |
| 24 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 25 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 26 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 27 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 28 | Smiley Drilling Co | Oklahoma City, OK 73156-0773 | Oil & Gas Operator | Apr 1999 |
| 29 | Smith Production Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 30 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 31 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Jun 2025 |
| 32 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 33 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 34 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 35 | Southcreek Petroleum Co LLC | Blanchard, OK 73010-4911 | Oil & Gas Operator | Oct 2024 |
| 36 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Apr 2025 |
| 37 | Southfourk Partners LLC | Blanchard, OK 73010-7209 | Oil Operator | Feb 2025 |
| 38 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 39 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2025 |
| 40 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 41 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Apr 2025 |
| 42 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 43 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |
| 44 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Apr 2025 |
| 45 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Apr 2025 |
| 46 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 47 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 48 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 49 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 50 | Stauros Operating Company | Edmond, OK 73083-2707 | Oil & Gas Operator | Mar 2001 |
| 51 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 52 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 53 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2025 |
| 54 | Stewart Inc | Ringling, OK 73456 | Oil & Gas Operator | Apr 2025 |
| 55 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2025 |
| 56 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 57 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2025 |
| 58 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2025 |
| 59 | Sunbelt Oil Investments Inc | Lindsay, OK 73052 | Oil & Gas Operator | May 1993 |
| 60 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2025 |
| 61 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 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 |