| 101 | Santa Fe Energy Operating Partner LP | Midland, TX 79701 | Oil & Gas Operator | Sep 2004 |
| 102 | Sharon Oil Company Inc | | Oil Operator | Aug 1997 |
| 103 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2024 |
| 104 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2024 |
| 105 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Oct 2024 |
| 106 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 107 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2024 |
| 108 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 109 | Suncoast Technical Service Inc | Plano, TX 75074-5438 | Oil Operator | Mar 2005 |
| 110 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 111 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Sep 2024 |
| 112 | Thunder Oil & Gas, LLC | Ardmore, OK 73402 | Oil & Gas Operator | Oct 2024 |
| 113 | Tide West Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2021 |
| 114 | Tri-State Pipeline Service Inc | Ninnekah, OK 73067-0189 | Oil & Gas Operator | Mar 2011 |
| 115 | Twisted Resources Inc | Blanchard, OK 73010-8463 | Oil & Gas Operator | Oct 2024 |
| 116 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 117 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Oct 2024 |
| 118 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 119 | Valero Marketing & Supply Co | San Antonio, TX 78269-6000 | Oil & Gas Operator | Sep 2023 |
| 120 | Vintage Marketing Inc | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2003 |
| 121 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2024 |
| 122 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 123 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 124 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 125 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 126 | Williams Petroleum Company, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2024 |
| 127 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 128 | WM Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Sep 2024 |
| 129 | Wolf Howard Lee | Burneyville, OK 73430-9617 | Oil & Gas Operator | Jun 2000 |