| 1 | Amax Petroluem Corp. | | Oil & Gas Operator | Nov 1983 |
| 2 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 3 | Aria Operating LLC | | Oil Operator | Jun 2025 |
| 4 | Beaver Operating Company, LLC | | Oil & Gas Operator | Jun 2025 |
| 5 | Black Horse Resources, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 2024 |
| 6 | Bruxoil Inc | | Oil & Gas Operator | Jun 2025 |
| 7 | Chevron U. S. A., Inc. -Ca | | Oil & Gas Operator | Jan 2000 |
| 8 | Chevron U. S. A., Inc. -TX | | Oil & Gas Operator | Dec 2004 |
| 9 | Cities Service Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 10 | Clarkco Services, Inc. | | Oil & Gas Operator | May 2025 |
| 11 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 12 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 13 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 14 | Euromin Canada, Inc. | | Oil & Gas Operator | Mar 1987 |
| 15 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 16 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Jul 2025 |
| 17 | J. Willis Hughes | | Oil & Gas Operator | Sep 1984 |
| 18 | Jett Drilling Co. | | Oil & Gas Operator | Feb 1984 |
| 19 | Kelso Casing Pulling Of MS Inc | | Oil & Gas Operator | Dec 1993 |
| 20 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 21 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 22 | Mize Energy Producers, LLC | | Oil & Gas Operator | Jul 2025 |
| 23 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 24 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 25 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 26 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Jul 2025 |
| 27 | R. W. Tyson Producing Co.,Inc | | Oil & Gas Operator | Dec 2024 |
| 28 | Remington Oil And Gas Corporation | | Oil & Gas Operator | Sep 2009 |
| 29 | Roundtree & Associates, Inc. | | Oil & Gas Operator | Jun 2024 |
| 30 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | Jun 2025 |
| 31 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 32 | Scorpion Oil & Gas, LLC | Houston, TX 77036 | Oil & Gas Operator | May 2025 |
| 33 | Shell Oil Co. -Nola | | Oil & Gas Operator | Jun 2000 |
| 34 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 35 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 36 | Smith Operating & Management Co. | Shreveport, LA 71161 | Oil & Gas Operator | Feb 2005 |
| 37 | Spooner Petroleum Company | | Oil & Gas Operator | Jul 2025 |
| 38 | Strong Rock Operating Company, LLC | | Oil & Gas Operator | Jul 2025 |
| 39 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Oct 2025 |
| 40 | Tellus Operating Group, LLC | | Oil & Gas Operator | Jun 2025 |
| 41 | Transcontinental Oil Corp. | | Oil & Gas Operator | Sep 1985 |
| 42 | Triad Oil & Gas Co Inc | | Oil & Gas Operator | Jun 1994 |
| 43 | Ultramar Oil & Gas LTD | Houston, TX 77060 | Oil & Gas Operator | Jul 1995 |
| 44 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Jul 2025 |
| 45 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2024 |
| 46 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 47 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Oct 2025 |
| 48 | Xmco Inc | | Oil & Gas Operator | Sep 1986 |