| 1 | S And M Liquid Tire Fill Inc | | Oil & Gas Operator | Dec 2025 |
| 2 | S R W Inc | | Gas Operator | Aug 2017 |
| 3 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 4 | Salem Oil LLC | | Oil Operator | Sep 2025 |
| 5 | Samson Natural Gas Co | | Oil & Gas Operator | Oct 1992 |
| 6 | Samson Natural Gas Co And Miller Energy Miller Oil | | Oil & Gas Operator | Aug 2000 |
| 7 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 8 | Sappington Carol J | | Oil Operator | Mar 2017 |
| 9 | Sappington Crude Oil Inc | | Oil & Gas Operator | Dec 2024 |
| 10 | Sappington Henry | | Oil Operator | Dec 2010 |
| 11 | Sappington Walter B | | Oil Operator | Dec 2024 |
| 12 | Sappington Walter B Dianne M | | Oil Operator | Dec 2024 |
| 13 | Savoy Energy LP | Traverse City, MI 49685-1560 | Oil & Gas Operator | Nov 2025 |
| 14 | Savoy Exploration Inc | | Oil & Gas Operator | Feb 2020 |
| 15 | Scandia Energy Co Inc | Traverse City, MI 49684 | Oil & Gas Operator | Dec 1993 |
| 16 | Schmude And Pangborn Associates | | Oil & Gas Operator | Apr 1993 |
| 17 | Schmude Oil Co | | Oil & Gas Operator | Mar 2014 |
| 18 | Schmude Oil Inc | | Oil & Gas Operator | Nov 2025 |
| 19 | Schnell Louis L | | Oil Operator | Dec 2018 |
| 20 | Scott Don Drilling Co Inc | | Gas Operator | Oct 2000 |
| 21 | Security Gas And Oil Inc | | Gas Operator | Jul 1989 |
| 22 | Shell Onshore Ventures Inc | Houston, TX 77210 | Gas Operator | Jun 2002 |
| 23 | Sherred Homer G And Fleeharty Willie W | | Oil & Gas Operator | Jun 1991 |
| 24 | Silver Petroleum Inc | | Gas Operator | Dec 2001 |
| 25 | Slow Stroke Productions LLC | | Oil Operator | Dec 2025 |
| 26 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 27 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Nov 2025 |
| 28 | Somoco Inc | | Oil & Gas Operator | Nov 2025 |
| 29 | South Romeo Gas Storage Company LLC | | Gas Operator | Feb 1994 |
| 30 | Southern Energy Operating Co Inc | | Oil Operator | Oct 2025 |
| 31 | St Cleric Resources LLC | | Gas Operator | Nov 2025 |
| 32 | Staton Petroleum Inc | | Oil & Gas Operator | Dec 1994 |
| 33 | Stephens Energy Company LLC | | Oil & Gas Operator | Feb 2010 |
| 34 | Sterling Operators Inc | | Oil Operator | Dec 2025 |
| 35 | Stevenson Oil Co | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 36 | Stoney Creek Production LLC | | Oil Operator | Nov 2025 |
| 37 | Stoney Lake Production Co LLC | | Oil Operator | Oct 2025 |
| 38 | Stover Petroleum Inc | | Oil & Gas Operator | Mar 1990 |
| 39 | Sturgeon Point Development Co | | Gas Operator | Jun 2019 |
| 40 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 41 | Summit Essexville Inc | | Oil Operator | Dec 2014 |
| 42 | Summit Petroleum Corp And Muskegon Development C | | Oil Operator | Dec 2006 |
| 43 | Summit Petroleum Corp Of MT Pleasant | | Oil & Gas Operator | Dec 2007 |
| 44 | Summit Reed City Inc | | Oil Operator | Dec 2014 |
| 45 | Sumner Energy Inc | | Oil & Gas Operator | Nov 2025 |
| 46 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 47 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 48 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 49 | Swepi LP And Miller Brothers | | Oil & Gas Operator | Oct 1992 |
| 50 | Synergy Development Corp | | Oil Operator | Apr 2011 |