| 1 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 2 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 3 | Sand Hill, LTD. | | Gas Operator | Dec 2024 |
| 4 | Schmid Properties, Inc. | Hico, TX 76457 | Oil & Gas Operator | Feb 2026 |
| 5 | Segars Operating | | Gas Operator | Apr 2014 |
| 6 | Shadrack Production Company | | Gas Operator | Dec 1982 |
| 7 | Shiloh Creek Resources, Inc. | | Gas Operator | Nov 2024 |
| 8 | Shoreline Pipeline Corporation | | Oil Operator | Dec 2020 |
| 9 | Sierra Oil & Gas Corp. | | Gas Operator | Dec 1979 |
| 10 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Nov 2025 |
| 11 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Feb 2026 |
| 12 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 13 | South Coast Oil, Inc. | | Oil & Gas Operator | Jul 1989 |
| 14 | Southern Solutions And Services LLC | | Oil Operator | Dec 2014 |
| 15 | Southern States Petroleum Corp | | Oil Operator | Jan 1984 |
| 16 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 17 | Spillers Petroleum, Inc. | | Gas Operator | Mar 2010 |
| 18 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 19 | Spooner Petroleum Company | | Oil & Gas Operator | Oct 2025 |
| 20 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 21 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 22 | Stinson Gas Company, L.L.C. | | Gas Operator | Jul 2018 |
| 23 | Story Oil And Gas Inc | Magnolia, AR 71753 | Oil & Gas Operator | Jan 2025 |
| 24 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 25 | Strataform, Inc. | | Gas Operator | Jun 2002 |
| 26 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Feb 2026 |
| 27 | Sundance Energy Corporation | | Oil & Gas Operator | Jan 2025 |
| 28 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 29 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Nov 2025 |