| 1 | Amrich Energy Inc. | | Oil & Gas Operator | Dec 2022 |
| 2 | Bakersfield Energy Resources Inc. | | Oil & Gas Operator | Dec 1998 |
| 3 | Binion Exploration & Development | | Oil Operator | Dec 2024 |
| 4 | Black Velvet Petro. Co. | | Oil & Gas Operator | Dec 2007 |
| 5 | Campo Verde Oil Inc. | | Oil Operator | Dec 2024 |
| 6 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 7 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 8 | Concho Petroleum | | Oil & Gas Operator | Dec 1994 |
| 9 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 10 | Dcor, L.L.C. | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 11 | Emjayco L. P. | | Oil Operator | Dec 2020 |
| 12 | G.E.C. Oil And Gas Operations | | Gas Operator | Dec 1984 |
| 13 | Heritage Oil Company | Norman, OK 73070 | Oil & Gas Operator | Jul 2008 |
| 14 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 15 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 16 | Kem Enterprise Inc. | | Oil & Gas Operator | Dec 2024 |
| 17 | Longbow LLC | | Oil & Gas Operator | Dec 2024 |
| 18 | Modus Inc. | | Oil & Gas Operator | Dec 2024 |
| 19 | Nordic Oil Company | | Oil & Gas Operator | Dec 1999 |
| 20 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 21 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
| 22 | Pancanadian Petroleum Company | | Oil & Gas Operator | Oct 1989 |
| 23 | Pentarch Petroleum | | Oil Operator | Dec 2024 |
| 24 | Petro Nova | | Oil Operator | Dec 2000 |
| 25 | Petro-Lud Inc. | | Oil & Gas Operator | Dec 2024 |
| 26 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 27 | Sequoia Exploration Inc. | | Oil & Gas Operator | Dec 2024 |
| 28 | Smilodon Oil Company | | Oil Operator | Dec 2024 |
| 29 | Strata-X Inc. | | Oil & Gas Operator | Dec 2024 |
| 30 | Trio Petroleum LLC | | Oil & Gas Operator | Dec 2024 |
| 31 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |
| 32 | Western States International Inc. | | Oil & Gas Operator | Dec 2024 |
| 33 | Zynergy LLC | | Oil Operator | Dec 2024 |