| 1 | Araxas Exploration, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 2 | Boots Smith Oilfield Services, LLC | | Oil & Gas Operator | Dec 2006 |
| 3 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 4 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Oct 2002 |
| 5 | Callon Petroleum Operating Co | Houston, TX 77042 | Oil & Gas Operator | Jul 2024 |
| 6 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 7 | Crosbys Creek Oil & Gas, LLC | Ridgeland, MS 39157 | Oil & Gas Operator | Jun 2024 |
| 8 | Dan A. Hughes Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Jun 2024 |
| 9 | De Soto Oil Properties, LLC | | Oil & Gas Operator | Jun 2024 |
| 10 | Delco Operating Company LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 11 | Delphi Oil, Inc. | Delphi, IN 46923 | Oil & Gas Operator | Jun 2024 |
| 12 | Gas Processors, Inc. | Columbia, MS 39429 | Oil & Gas Operator | Apr 2019 |
| 13 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 14 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Nov 2024 |
| 15 | JN Expl & Prod LTD Partnership | Billings, MT 59103-0159 | Oil & Gas Operator | Feb 2001 |
| 16 | John E. McCool, Dba Edward Oil Company | Youngsville, PA 16371-0202 | Oil & Gas Operator | Jun 2024 |
| 17 | Midco Energy, Inc. | | Oil & Gas Operator | Dec 1992 |
| 18 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 19 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 20 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Nov 2024 |
| 21 | Prospective Investment & Trading Co., LTD., The | Tulsa, OK 74170-2320 | Oil & Gas Operator | Apr 2014 |
| 22 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Aug 2024 |
| 23 | Spooner Petroleum Company | | Oil & Gas Operator | Jun 2024 |
| 24 | Strago Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Aug 1994 |
| 25 | Swift Energy Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Jun 2017 |
| 26 | T. K. Stanley, Inc. | | Oil & Gas Operator | Jul 1982 |
| 27 | Texaco Producing Inc. | Rock Springs, WY 82901 | Oil & Gas Operator | Dec 2000 |
| 28 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 29 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Nov 2024 |
| 30 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Aug 2024 |
| 31 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Nov 2024 |
| 32 | Williams, Clayton W., Jr. | | Oil & Gas Operator | Jun 1989 |
| 33 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Nov 2024 |
| 34 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |