| 1 | Al Merit Energy Co., Inc. | | Oil & Gas Operator | Jun 2015 |
| 2 | Arco Oil & Gas Co., Div. Of Atlantic Richfield | | Oil & Gas Operator | Jul 1992 |
| 3 | Bay City Minerals, Inc. | | Gas Operator | May 1990 |
| 4 | Bernard/Hickox, Inc. | | Oil & Gas Operator | May 1998 |
| 5 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 6 | Citmoco Services, Inc. | | Oil Operator | Jan 1971 |
| 7 | Citronelle Operating Co., LLC | | Oil & Gas Operator | Sep 1997 |
| 8 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2024 |
| 9 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 10 | Federal Hill Land Co., Inc. | | Gas Operator | Apr 1991 |
| 11 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Nov 2023 |
| 12 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 13 | Hickox, I. N. | | Oil Operator | Nov 1967 |
| 14 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2024 |
| 15 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 16 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 17 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 18 | Mosbacher Production Co. | Houston, TX 77001 | Oil & Gas Operator | Aug 1984 |
| 19 | Mosbacher, Robert-Pruet, Chesley | | Oil & Gas Operator | Dec 1983 |
| 20 | Murphy Production Co. (Inc.) | | Oil & Gas Operator | Apr 1991 |
| 21 | Odom, Ralph R. | | Oil & Gas Operator | Aug 1993 |
| 22 | Ram Petroleum, LLC | Tylertown, MS 39667 | Oil & Gas Operator | Jan 2024 |
| 23 | Richland Resources, Inc. | | Oil & Gas Operator | Aug 1990 |
| 24 | Union Exploration Partners, LTD. | | Oil & Gas Operator | Aug 1990 |
| 25 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 26 | Unit Manager, Citronelle Unit | | Oil & Gas Operator | Sep 2001 |
| 27 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Dec 2023 |