| 1 | S & C Resources Inc | Cleveland, OK 74020 | Oil Operator | May 2025 |
| 2 | S & M Production Inc | Pawnee, OK 74058 | Oil & Gas Operator | Aug 2023 |
| 3 | Sabos George U | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2013 |
| 4 | Sallee Oil Corporation | Collinsville, OK 74021 | Oil & Gas Operator | Jun 2026 |
| 5 | Sandia Operating Corp. | San Antonio, TX 78270 | Oil & Gas Operator | May 2010 |
| 6 | Sboc LLC | Hallett, OK 74034 | Oil Operator | Jun 2026 |
| 7 | Scavenger Oil Company Inc | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 8 | Schuler Jr Chris C | Cleveland, OK 74020 | Oil Operator | Aug 2013 |
| 9 | Schuler Oil Properties LLC | Cleveland, OK 74020 | Oil Operator | Jun 2026 |
| 10 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Jul 2026 |
| 11 | Senax Inc | Tulsa, OK 74105-2206 | Oil & Gas Operator | Jun 2026 |
| 12 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 13 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 14 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Feb 2026 |
| 15 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Feb 2025 |
| 16 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 17 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 18 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 19 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 20 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034 | Oil Operator | Jun 2026 |
| 21 | Short Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jun 2026 |
| 22 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 23 | Sneed Drilling Company | Cleveland, OK 74020 | Oil & Gas Operator | Mar 2026 |
| 24 | Sneed William A Bill | Cleveland, OK 74020-1007 | Oil & Gas Operator | Jun 2026 |
| 25 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 26 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 27 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 28 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 29 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 30 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 31 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Jul 2026 |
| 32 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 33 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Jun 2026 |
| 34 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Jun 2026 |
| 35 | Spears Terry | Osage, OK 74054 | Oil Operator | May 2026 |
| 36 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Sep 2026 |
| 37 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jul 2026 |
| 38 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Jul 2026 |
| 39 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2026 |
| 40 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 41 | Stevens Quincy O | Oklahoma City, OK 73116-4102 | Oil & Gas Operator | Dec 2019 |
| 42 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Jul 2026 |
| 43 | Superior Production LLC | Ringwood, OK 73768 | Oil & Gas Operator | Jul 2026 |
| 44 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |