| 1 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Sep 2025 |
| 2 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 3 | S & S Star Operating, LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 4 | S/H Petroleum Corporation | Hennessey, OK 73742-0477 | Oil & Gas Operator | Feb 2016 |
| 5 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 6 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 7 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 8 | Sananco Energy Corp | Naples, FL 33941 | Oil & Gas Operator | Jul 2013 |
| 9 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 10 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Dec 2025 |
| 11 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 12 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 13 | Santa Fe-Andover Oil Co | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2000 |
| 14 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 15 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 16 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | Aug 2025 |
| 17 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 18 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 19 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 20 | Seahawk Oil International Inc | Newport Beach, CA 92660 | Oil & Gas Operator | Oct 1997 |
| 21 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 22 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Aug 2025 |
| 23 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 24 | Sears Joe M | Bethany, OK 730084841 | Oil & Gas Operator | May 2013 |
| 25 | Sears M N | Oklahoma City, OK 73143 | Oil & Gas Operator | Apr 2015 |
| 26 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 27 | Sensor Oil & Gas, Inc. | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 28 | Sentinel Petroleum Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2020 |
| 29 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Jun 2025 |
| 30 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 31 | Shaver Tommy L | Kingfisher, OK 73750-9612 | Oil & Gas Operator | Apr 2015 |
| 32 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 33 | Shelly Energy Inc | Berwyn, PA 19312 | Oil & Gas Operator | Sep 2025 |
| 34 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Aug 2025 |
| 35 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 36 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Dec 2025 |
| 37 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 38 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Jun 2025 |
| 39 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 40 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Sep 2025 |
| 41 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Aug 2025 |
| 42 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 43 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 44 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Sep 2025 |
| 45 | Sloan Oil Corporation | Humble, TX 77347 | Oil & Gas Operator | Mar 2015 |
| 46 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 47 | Smith Mike D | Stillwater, OK 74074 | Oil & Gas Operator | Apr 2015 |
| 48 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 49 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 50 | Sooner Crude Inc | Tulsa, OK 74136-9107 | Oil & Gas Operator | Sep 2008 |
| 51 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 52 | Sooner Oil & Gas LLC | Fairview, OK 73737-1806 | Oil & Gas Operator | Aug 2025 |
| 53 | Sooner Oilfield Services Inc | Piedmont, OK 73078-0810 | Oil & Gas Operator | May 2024 |
| 54 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 55 | South Forty Inc (The) | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 56 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Sep 2025 |
| 57 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 58 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Aug 2025 |
| 59 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 60 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2025 |
| 61 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Aug 2025 |
| 62 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Sep 2025 |
| 63 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Sep 2025 |
| 64 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Sep 2025 |
| 65 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 66 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 67 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 68 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Sep 2025 |
| 69 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Aug 2025 |
| 70 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 71 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 72 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Sep 2025 |
| 73 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2025 |
| 74 | Stone Creek Operating, LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 75 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 76 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 77 | Stride Energy LLC | Piedmont, OK 73078 | Oil & Gas Operator | Sep 2025 |
| 78 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 79 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 80 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 81 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 82 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Aug 2025 |
| 83 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |