| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | S2 Energy Operating LLC | Oil & Gas Operator | May 2023 | |
| 2 | Sevarg Company, Inc. | Oil & Gas Operator | Feb 2016 | |
| 3 | Sklar & Phillips Oil Co. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2000 |
| 4 | Sklar & Phillips Oil Co.-Entex | Oil & Gas Operator | Aug 1978 | |
| 5 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Dec 2024 |
| 6 | Southern Production & Expl Co. | Oil & Gas Operator | Apr 2008 | |
| 7 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 8 | SRP Production Corp. | Oil & Gas Operator | Nov 1997 | |
| 9 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 10 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Dec 2024 |
| 11 | Striker Petroleum Corporation | Englewood, CO 80111 | Oil & Gas Operator | Dec 1999 |
| 12 | Sun Exploration-Production Co. | Oil & Gas Operator | Jan 1990 | |
| 13 | Swag Oil And Gas Company, Inc. | Oil & Gas Operator | Jul 1982 | |
| 14 | SWN Production (Louisiana), LLC | Oil & Gas Operator | May 2024 |