| 1 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 2 | Samantha Petroleum Corp. | | Oil & Gas Operator | Apr 1987 |
| 3 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 4 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 5 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 6 | Sewell Development Co Inc | | Oil & Gas Operator | Apr 1993 |
| 7 | Sierra Industries, Inc. | | Oil & Gas Operator | Apr 1989 |
| 8 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 9 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 10 | Smith Operating And MGMT Co. | Shreveport, LA 71161 | Oil & Gas Operator | Jun 2023 |
| 11 | Southwest Operating Inc. | | Oil & Gas Operator | Dec 2024 |
| 12 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Oct 2025 |
| 13 | Stroud Production LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 14 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |
| 15 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 16 | Sundance Energy Corporation | | Oil & Gas Operator | Jan 2025 |
| 17 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |
| 18 | SWN Production (Louisiana), LLC | | Oil & Gas Operator | Dec 2024 |