| 1 | Alog, LLC | Brewton, AL 36427 | Oil & Gas Operator | Jul 2025 |
| 2 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 3 | Anderson, Arden A. | | Oil & Gas Operator | Jun 1970 |
| 4 | Ankor E&P Holdings Corporation | | Oil & Gas Operator | Jan 2021 |
| 5 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Oct 2025 |
| 6 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 7 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 8 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 9 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 10 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 11 | Dcor, L.L.C. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2025 |
| 12 | De Soto Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2006 |
| 13 | De Soto Oil Properties, LLC | | Oil & Gas Operator | Jul 2025 |
| 14 | Durango Operating, LLC | Madison, MS 39110 | Oil & Gas Operator | Jul 2025 |
| 15 | Edge Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 1999 |
| 16 | Escambia Operating Co. LLC | Gulfport, MS 39501 | Oil & Gas Operator | Jul 2025 |
| 17 | Esco Oil & Gas, Inc. | | Oil & Gas Operator | Nov 2009 |
| 18 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 19 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 20 | Fairways Exploration & Production, LLC | Houston, TX 77057 | Oil & Gas Operator | Aug 2025 |
| 21 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 22 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Jul 2025 |
| 23 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 24 | Foshee Operating, LLC | | Oil & Gas Operator | Jun 2004 |
| 25 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 26 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 27 | Gulf Refining Co. | | Oil Operator | Dec 2006 |
| 28 | Hadson Petroleum (USA), Inc. | | Oil & Gas Operator | Dec 1992 |
| 29 | Herlihy, John D. | | Oil & Gas Operator | May 1997 |
| 30 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Oct 2025 |
| 31 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Jul 2025 |
| 32 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 33 | Inexco Oil Company | Houston, TX 77210 | Oil & Gas Operator | Mar 2013 |
| 34 | JN Expl & Prod LTD Partnership | Billings, MT 59103-0159 | Oil & Gas Operator | Feb 2001 |
| 35 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 36 | Mallard Exploration, Inc. | | Oil & Gas Operator | Sep 1975 |
| 37 | Marco Land & Petroleum, Inc. | | Oil & Gas Operator | Jun 2000 |
| 38 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 39 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 40 | Mobil Oil Exploration & Producing Southeast, Inc. | | Oil & Gas Operator | Jul 2025 |
| 41 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 42 | Pacific Enterprises Oil Co. (USA) | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 43 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 44 | Pollard Operating, LLC | | Oil Operator | May 2001 |
| 45 | Pruet Production Co. | Jackson, MS 39201 | Oil & Gas Operator | Jul 2025 |
| 46 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2025 |
| 47 | Rockbridge Oil And Gas, Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1997 |
| 48 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 49 | Smackco, LTD. | | Oil & Gas Operator | Oct 2002 |
| 50 | Spooner Petroleum Company | | Oil & Gas Operator | Jul 2025 |
| 51 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Oct 2025 |
| 52 | Tepee Petroleum Company, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 2014 |
| 53 | Tesoro Petroleum Corporation | | Oil & Gas Operator | May 1982 |
| 54 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 55 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 56 | Ventex Operating Corp. | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 57 | Venture Oil & Gas, Inc. | Laurel, MS 39440 | Oil & Gas Operator | Jul 2025 |
| 58 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 59 | Wheless Industries, Inc. | Shreveport, LA 71101-5301 | Oil & Gas Operator | Sep 2002 |
| 60 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |