| 1 | Amax Petroluem Corp. | | Oil & Gas Operator | Nov 1983 |
| 2 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 3 | Browning & Welch, Inc. | | Oil & Gas Operator | Mar 2005 |
| 4 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Oct 2002 |
| 5 | Cities Service Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 6 | Cody Operating, Inc. | | Oil & Gas Operator | Sep 2024 |
| 7 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 8 | Columbia Petroleum LLC | Brookhaven, MS 39601 | Oil & Gas Operator | Jul 2024 |
| 9 | Continental Oil Co. | Durango, CO 81301 | Oil & Gas Operator | Dec 1983 |
| 10 | Dapsco, Inc. | | Oil & Gas Operator | Dec 1976 |
| 11 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Dec 2024 |
| 12 | Enex Rexources Corp. | | Oil & Gas Operator | Jul 1981 |
| 13 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2024 |
| 14 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 15 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Jul 2024 |
| 16 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 17 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 18 | John S. Callon Et Al | | Oil & Gas Operator | Jan 1985 |
| 19 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 20 | Kay-Lyn Petroleum Co. | | Oil & Gas Operator | Oct 1989 |
| 21 | KCP Of MS Inc | | Oil & Gas Operator | Jan 1991 |
| 22 | Kelso Casing Pulling Of MS Inc | | Oil & Gas Operator | Dec 1993 |
| 23 | Kinetic Energy Co., Inc. | | Oil & Gas Operator | Jan 1992 |
| 24 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 25 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 26 | Mize Operations, LLC. | | Oil & Gas Operator | Dec 2018 |
| 27 | Moon-Hines-Tigrett Operating Co., Inc. | | Oil & Gas Operator | Jul 2024 |
| 28 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2024 |
| 29 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 30 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Dec 2024 |
| 31 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 32 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Sep 2024 |
| 33 | Pursue Energy Corp | | Gas Operator | Sep 2016 |
| 34 | Ram Petroleum, LLC | Tylertown, MS 39667 | Oil & Gas Operator | Oct 2024 |
| 35 | Roundtree & Associates, Inc. | | Oil & Gas Operator | Jun 2024 |
| 36 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 37 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 38 | Signal, LLC | | Oil & Gas Operator | Sep 2024 |
| 39 | Slik-Dril, Inc | | Oil & Gas Operator | Nov 1998 |
| 40 | Southern Energy Operating, LLC | | Oil & Gas Operator | Sep 2024 |
| 41 | Spooner Petroleum Company | | Oil & Gas Operator | Jul 2024 |
| 42 | Stinson, Jan | | Oil Operator | May 1984 |
| 43 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 44 | TNT Operating LLC | | Oil & Gas Operator | Aug 2016 |
| 45 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 46 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 47 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Dec 2024 |
| 48 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Sep 2024 |
| 49 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2024 |
| 50 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2024 |