| 1 | S & G Operating LLC | Kingfisher, OK 73750-0256 | Oil & Gas Operator | Jan 2024 |
| 2 | S & S Oil & Gas Corporation | Okemah, OK 74859-0659 | Oil & Gas Operator | Sep 2014 |
| 3 | S & S Star Operating LLC | | Oil & Gas Operator | Jun 2023 |
| 4 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 5 | Salty Dog Disposal LLC | | Oil Operator | Feb 2024 |
| 6 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 7 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 8 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 9 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 10 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2024 |
| 11 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 12 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |
| 13 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 14 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 15 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 16 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 17 | Scarth Oil & Gas Co | Amarillo, TX 79101 | Oil & Gas Operator | Feb 1999 |
| 18 | Schell Sam H | Barnsdall, OK 74002 | Oil & Gas Operator | Aug 1999 |
| 19 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 20 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 21 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 22 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 23 | Semcrude LP | | Oil & Gas Operator | Jul 2008 |
| 24 | Sequent Exploration Inc | | Oil & Gas Operator | Oct 2017 |
| 25 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 26 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2024 |
| 27 | Singer Oil Co LLC | Hennessey, OK 73742-0307 | Oil & Gas Operator | Jan 2024 |
| 28 | SK Plymouth LLC | | Oil & Gas Operator | Oct 2023 |
| 29 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2024 |
| 30 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 31 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2023 |
| 32 | Sloan Petroleum Service Inc | Edmond, OK 73003-0018 | Oil & Gas Operator | Jan 2024 |
| 33 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 34 | Smith Edward F | Avant, OK 74001-0024 | Oil & Gas Operator | Nov 2014 |
| 35 | Sneed William A Bill | Cleveland, OK 74020-1007 | Oil & Gas Operator | Jan 2024 |
| 36 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 37 | Sooner Oil & Gas | | Oil & Gas Operator | Dec 2023 |
| 38 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 39 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 40 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jan 2024 |
| 41 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Jan 2024 |
| 42 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 43 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 44 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2023 |
| 45 | Staghorn Petroleum II LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 46 | Staghorn Petroleum LLC | | Oil & Gas Operator | Dec 2023 |
| 47 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 48 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 49 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2024 |
| 50 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 51 | Stone Oak Operating, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2024 |
| 52 | Stride Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 53 | Struck Rock Oil And Gas LLC | | Oil & Gas Operator | Dec 2023 |
| 54 | Summit Overseas Expl., Inc. | Denver, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 55 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 56 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 57 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 58 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 59 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 60 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 61 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 62 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 63 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 64 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |