| 1 | Arkana Operating Company, Inc | Fort Worth, TX 76116-5707 | Oil & Gas Operator | Jul 2008 |
| 2 | Bowman & Cains Exploration, LLC | | Gas Operator | Sep 2020 |
| 3 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 4 | Fort Exploration Company | FT Smith, AR 72901 | Gas Operator | May 2001 |
| 5 | Fort Operating Company | Fort Smith, AR 72923 | Gas Operator | Nov 2018 |
| 6 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Nov 2024 |
| 7 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 8 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 9 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2024 |
| 10 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2024 |
| 11 | Ross Explorations, Inc | Fort Smith, AR 72903 | Gas Operator | Oct 2024 |
| 12 | Sagely, Floyd E Properties, LTD | Fort Smith, AR 72917-0308 | Gas Operator | Jan 2015 |
| 13 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Mar 2025 |
| 14 | Seeco, Inc. | | Gas Operator | Mar 2015 |
| 15 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 16 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Dec 2024 |
| 17 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Mar 2025 |
| 18 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |
| 19 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 20 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |