| 1 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Oct 2025 |
| 2 | S & S Oil Leasing | Chase, KS 67524 | Oil Operator | Jun 2025 |
| 3 | S & S Oil, L.L.C. | Chase, KS 67524 | Oil Operator | Jun 2025 |
| 4 | Samson Resources | | Oil Operator | Jan 1994 |
| 5 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 6 | Scheck Oil Operation | | Oil & Gas Operator | Jun 2025 |
| 7 | Schmidt, Terry D. | McPherson, KS 67460 | Oil Operator | Jun 2025 |
| 8 | Schulz Oil & Gas, Inc. | Canton, KS 67428 | Oil & Gas Operator | Dec 2024 |
| 9 | Schulz Roger A | | Oil & Gas Operator | Dec 1996 |
| 10 | Sher-Lon Corpora | | Oil Operator | Apr 1994 |
| 11 | Smith Oil Operations | | Oil & Gas Operator | Jun 2025 |
| 12 | Smith Richard F | | Oil Operator | Jun 1995 |
| 13 | Smokey Valley Resources | Lyons, KS 67554 | Oil Operator | Jun 1998 |
| 14 | Smoky Valley Res | | Oil & Gas Operator | Dec 1995 |
| 15 | South Bay Oil Corporation | Wichita, KS 67202 | Oil Operator | Dec 2019 |
| 16 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | May 2025 |
| 17 | Southern States | | Oil & Gas Operator | Jul 1988 |
| 18 | Spess Oil Company, A General Partnership | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2025 |
| 19 | Spring Creek Farm And Oil, LLC | Bixby, OK 74008 | Oil Operator | Jun 2025 |
| 20 | Stepco Oil, Inc. | Ellinwood, KS 67526 | Oil Operator | Jan 2020 |
| 21 | Sterling Drillin | | Oil & Gas Operator | Mar 1992 |
| 22 | Sterling Drilling Company | Pratt, KS 67124 | Oil & Gas Operator | Apr 2014 |
| 23 | Stratakan Exploration, LLC | Plainville, KS 67663 | Oil & Gas Operator | Jun 2025 |
| 24 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |