| 1 | Ad Astra Resources LLC | Wichita, KS 67203 | Oil & Gas Operator | Sep 2025 |
| 2 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | Aug 2025 |
| 3 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 4 | Cody Operating, Inc. | | Oil & Gas Operator | Aug 2025 |
| 5 | Energy Dev Corp | | Oil & Gas Operator | Mar 1998 |
| 6 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2025 |
| 7 | EP Operating Co. | Dallas, TX 75201 | Oil & Gas Operator | Jan 1993 |
| 8 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 9 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 10 | J. R. Pounds, Inc. | Laurel, MS 39441 | Oil & Gas Operator | Aug 2025 |
| 11 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 12 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 13 | Moon-Hines-Tigrett Operating Co., Inc. | | Oil & Gas Operator | Jun 2025 |
| 14 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 15 | Mullen-Hathorn-Bass | | Oil & Gas Operator | Mar 1985 |
| 16 | Murphy Oil USA, Inc. | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 17 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2025 |
| 18 | Petroleum Corp. Of Delaware | | Oil & Gas Operator | May 1991 |
| 19 | Prospective Investment & Trading Co., LTD. | Tulsa, OK 74170-2320 | Oil & Gas Operator | Apr 2014 |
| 20 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Aug 2025 |
| 21 | Roundtree & Associates, Inc. | | Oil & Gas Operator | Jun 2024 |
| 22 | Signal, LLC | | Oil & Gas Operator | Aug 2025 |
| 23 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 24 | Smith Operating & Management Co. | Shreveport, LA 71161 | Oil & Gas Operator | Feb 2005 |
| 25 | Spooner Petroleum Company | | Oil & Gas Operator | Jul 2025 |
| 26 | Starr Operating Company | Austin, TX 78759 | Oil & Gas Operator | Nov 2025 |
| 27 | Strong Rock Operating Company, LLC | | Oil & Gas Operator | Aug 2025 |
| 28 | Tomlinson Interests | | Oil & Gas Operator | Jan 1983 |
| 29 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 30 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |