| 1 | A.D.A. Oil Co | Iowa Park, TX 76367 | Oil Operator | Aug 2003 |
| 2 | Ada Oil Exploration Corp | | Oil & Gas Operator | Jan 1986 |
| 3 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 4 | American Southwest Corp. | | Oil & Gas Operator | Dec 1989 |
| 5 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Sep 2024 |
| 6 | Collins Associates Inc | | Oil & Gas Operator | Mar 1987 |
| 7 | E. B. Germany & Sons, LLC | | Oil & Gas Operator | Dec 2011 |
| 8 | Eclipse Petroleum | | Oil & Gas Operator | Aug 1991 |
| 9 | Exxon Corporation -La | | Oil & Gas Operator | Sep 1989 |
| 10 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 11 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 12 | Grady B. Langston | | Oil & Gas Operator | Jun 1982 |
| 13 | J. R. Pounds, Inc. | Laurel, MS 39441 | Oil & Gas Operator | Aug 2024 |
| 14 | KCP Of MS Inc | | Oil & Gas Operator | Jan 1991 |
| 15 | Midco Energy, Inc. | | Oil & Gas Operator | Dec 1992 |
| 16 | Moon-Hines-Tigrett Operating Co., Inc. | | Oil & Gas Operator | Jun 2024 |
| 17 | Mullen Exploration Inc | | Oil & Gas Operator | Dec 2002 |
| 18 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 19 | Natchez Operating, LLC | | Oil & Gas Operator | Nov 2023 |
| 20 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Nov 2024 |
| 21 | Pennzoil Producing Company | | Oil & Gas Operator | Oct 1992 |
| 22 | Phoenix Petroleum Corp. | | Gas Operator | Aug 1985 |
| 23 | Pistol Ridge Partners, LLC | | Oil & Gas Operator | Aug 2024 |
| 24 | Pittman, Joe N. | | Oil & Gas Operator | Apr 1985 |
| 25 | Professional Management Serv | | Oil Operator | Mar 1991 |
| 26 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Aug 2024 |
| 27 | R. W. Tyson Producing Co.,Inc | | Oil & Gas Operator | Sep 2024 |
| 28 | Ram Petroleum, LLC | Tylertown, MS 39667 | Oil & Gas Operator | Aug 2024 |
| 29 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 30 | Skrivanos Engineering, Inc. | Shreveport, LA 71164 | Oil & Gas Operator | Dec 2011 |
| 31 | Spooner Petroleum Company | | Oil & Gas Operator | Jun 2024 |
| 32 | Sun Oil Company | Arlington, TX 76006 | Oil & Gas Operator | Dec 2021 |
| 33 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 34 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Nov 2024 |
| 35 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 36 | Texaco Seaboard, Inc. | | Gas Operator | Sep 1980 |
| 37 | Tuway Oil, Inc | | Oil & Gas Operator | Jun 2006 |
| 38 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Nov 2024 |
| 39 | Waller Brothers, Inc. | | Oil & Gas Operator | Jul 2004 |