| 1 | Belden & Blake | | Oil & Gas Operator | Feb 1988 |
| 2 | BPS Operating Services LLC | | Oil Operator | Jan 2005 |
| 3 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 4 | Edwards Producing Co.,Inc. | | Oil Operator | Jun 1987 |
| 5 | Energy Production Service Inc | | Oil Operator | Mar 1986 |
| 6 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 7 | G & S Oil Company | | Oil & Gas Operator | Dec 2024 |
| 8 | Infield Discovery LLC | Madison, MS 39110 | Oil & Gas Operator | Sep 2025 |
| 9 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |
| 10 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 11 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Dec 2025 |
| 12 | Moon-Hines-Tigrett Operating Co., Inc. | | Oil & Gas Operator | Sep 2025 |
| 13 | Morrow Oil & Gas Co. | Terry, MS 39170 | Oil & Gas Operator | Sep 2025 |
| 14 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 15 | Petro-Can, Inc. | | Oil & Gas Operator | Apr 1998 |
| 16 | Pistol Ridge Partners, LLC | | Oil & Gas Operator | Sep 2025 |
| 17 | S. Lavon Evans Jr Inc, Et Al | | Oil & Gas Operator | Jan 2010 |
| 18 | Spooner Petroleum Company | | Oil & Gas Operator | Sep 2025 |
| 19 | T. J. Oil And Gas, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 20 | Tellus Operating Group, LLC | | Oil & Gas Operator | Sep 2025 |
| 21 | W.S. Red Hancock, Inc. | | Oil Operator | Dec 1986 |