| 1 | S & C Resources Inc | Cleveland, OK 74020-0604 | Oil Operator | Feb 2024 |
| 2 | S & M Production Inc | Pawnee, OK 74058-4516 | Oil & Gas Operator | Aug 2023 |
| 3 | Sabos George U | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2013 |
| 4 | Sallee Oil Corporation | Collinsville, OK 74021-0550 | Oil & Gas Operator | Feb 2024 |
| 5 | Salty Dog Disposal LLC | | Oil Operator | Apr 2024 |
| 6 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 7 | Sboc LLC | | Oil Operator | Feb 2024 |
| 8 | Scavenger Oil Co., Inc. | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 9 | Schuler Jr Chris C | Cleveland, OK 74020 | Oil Operator | Aug 2013 |
| 10 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 11 | Semcrude LP | | Oil & Gas Operator | Jul 2008 |
| 12 | Senax Inc | Tulsa, OK 74105-2206 | Oil & Gas Operator | Feb 2024 |
| 13 | Sentinel Transportation LLC | | Oil & Gas Operator | Mar 2024 |
| 14 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 15 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 16 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Jan 2024 |
| 17 | Shallow Energy Inc | South Dennis, MA 02660-2028 | Oil & Gas Operator | Jan 2024 |
| 18 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 19 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 20 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Feb 2024 |
| 21 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 22 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 23 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034-0033 | Oil Operator | Feb 2024 |
| 24 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Feb 2024 |
| 25 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 26 | Sneed Drilling Company | | Oil & Gas Operator | Dec 2023 |
| 27 | Sneed William A Bill | Cleveland, OK 74020-1007 | Oil & Gas Operator | Feb 2024 |
| 28 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 29 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 30 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 31 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 32 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 33 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 34 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Mar 2024 |
| 35 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 36 | Sparks Greg | Afton, OK 74331-3897 | Oil & Gas Operator | Feb 2024 |
| 37 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Feb 2024 |
| 38 | Spears Terry | Osage, OK 74054 | Oil Operator | Nov 2023 |
| 39 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2024 |
| 40 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Mar 2024 |
| 41 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Mar 2024 |
| 42 | Stacy Operating LLC | Cushing, OK 74023-0511 | Oil & Gas Operator | Feb 2024 |
| 43 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 44 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 45 | Stevens Quincy O | Oklahoma City, OK 73116-4102 | Oil & Gas Operator | Dec 2019 |
| 46 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 47 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 48 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Mar 2024 |
| 49 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 50 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |