| 1 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2024 |
| 2 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 3 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 4 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Sep 2024 |
| 5 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Dec 2024 |
| 6 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2024 |
| 7 | Sanguine Gathering Company | Tulsa, OK 74170 | Oil & Gas Operator | Jul 2018 |
| 8 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 9 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 10 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 11 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 12 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 13 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 14 | Sebep LLC | Houston, TX 77224-9545 | Gas Operator | Oct 2024 |
| 15 | Sedna Energy LLC | Blanchard, OK 73010-8043 | Gas Operator | Apr 2017 |
| 16 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 17 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Oct 2024 |
| 18 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2024 |
| 19 | Smith W M | Barnstall, OK 74002 | Oil & Gas Operator | Sep 2024 |
| 20 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 21 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 22 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Oct 2024 |
| 23 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 24 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Oct 2024 |
| 25 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 26 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 27 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 28 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2024 |
| 29 | Stream Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2024 |
| 30 | Summit Energy, Inc. | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 31 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Dec 2024 |
| 32 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2024 |
| 33 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |