| 1 | Acadian Gas Pipeline System | | Oil Operator | Jan 2025 |
| 2 | Alpine Expl. Companies, Inc. | | Oil & Gas Operator | Jan 2024 |
| 3 | Amarex Inc | | Oil & Gas Operator | Dec 1996 |
| 4 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 5 | Aralpa Corporation | | Oil & Gas Operator | May 1987 |
| 6 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 7 | Ashland Oil, Inc | | Oil & Gas Operator | Dec 2023 |
| 8 | Associated Natural Gas, Inc. | | Oil Operator | Apr 1996 |
| 9 | Axis Onshore, LLC | | Oil & Gas Operator | Apr 2008 |
| 10 | Axis Onshore, LP | | Oil & Gas Operator | Dec 2010 |
| 11 | BCM Energy Louisiana LLC | | Oil Operator | May 2014 |
| 12 | BCM Energy Operating LLC | Lafayette, LA 70503 | Oil Operator | Jun 2015 |
| 13 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 14 | Belle Oil, Inc. | | Oil & Gas Operator | Sep 2025 |
| 15 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 16 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2025 |
| 17 | Brechtel Energy Corporation | | Oil & Gas Operator | Sep 2008 |
| 18 | Brock Exploration Corp | New Orleans, LA 70112-1707 | Oil & Gas Operator | Jan 1999 |
| 19 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 20 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 21 | Burlington Res Oil & Gas Co | | Oil & Gas Operator | Dec 2000 |
| 22 | C & K Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 1984 |
| 23 | C&M Operating Company, LLC | | Oil & Gas Operator | Apr 2011 |
| 24 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 25 | Calpine Natural Gas Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2002 |
| 26 | Carl Oil & Gas Co. | Bakersfield, CA 93309 | Oil & Gas Operator | Dec 1995 |
| 27 | Ceka Gas, Div Of GTC | | Oil & Gas Operator | May 1988 |
| 28 | Celeron Oil & Gas Company | | Oil & Gas Operator | Dec 1987 |
| 29 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 30 | Chevron Pipe Line Company | Houston, TX 77001 | Oil Operator | Feb 2015 |
| 31 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 32 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 33 | Crosstex Lig, LLC | | Oil Operator | Mar 2014 |
| 34 | Crosstex Treating Services, L.P. | | Oil Operator | Sep 2009 |
| 35 | Cypress Gas Pipeline Company | | Oil Operator | Dec 1998 |
| 36 | Cypress Gas Pipeline, LLC | | Oil Operator | Sep 2019 |
| 37 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Dec 2025 |
| 38 | Denovo Oil & Gas, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 1995 |
| 39 | Dixon Management Corp. | | Oil & Gas Operator | May 1984 |
| 40 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 41 | Dna Petroleum Inc. | | Oil Operator | Dec 2004 |
| 42 | Docherty Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 43 | Duke Energy Field Services Inc | | Oil Operator | Mar 2000 |
| 44 | Dune Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Jun 2016 |
| 45 | Dynamic Exploration, Inc. | | Oil & Gas Operator | Oct 2003 |
| 46 | Elmwood Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 47 | Enlink Lig, LLC | | Oil Operator | Jan 2025 |
| 48 | Ennex Inc | | Oil & Gas Operator | Oct 1993 |
| 49 | Enstar Petroleum Company | | Oil & Gas Operator | Aug 1985 |
| 50 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 51 | First Energy Corporation | | Oil & Gas Operator | Jun 1993 |
| 52 | Five-Jab, Inc. | Tomball, TX 77377 | Oil & Gas Operator | Dec 2025 |
| 53 | Flash Gas & Oil Southwest, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Oct 2019 |
| 54 | Flatwater Energy, LLC | | Oil & Gas Operator | Dec 2024 |
| 55 | Florida Exploration Co | Aurora, CO 80014 | Oil & Gas Operator | Sep 1989 |
| 56 | Florida Gas Transmission Co. | | Oil Operator | Dec 2007 |
| 57 | Forcenergy Gas Exploration Inc. | Miami, FL 33129 | Oil & Gas Operator | Aug 1996 |
| 58 | Forcenergy Inc | Miami, FL 33129 | Oil & Gas Operator | Mar 2015 |
| 59 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 60 | Gde Investments La, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 61 | Gde Tiger Petroleum, LLC | | Oil & Gas Operator | Dec 2024 |
| 62 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 63 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 64 | Goldking-Lakeshore | | Oil & Gas Operator | Oct 1985 |
| 65 | Griffin & Griffin Expl, LLC | | Oil & Gas Operator | Sep 2025 |
| 66 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 67 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 68 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Dec 2025 |
| 69 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 70 | Iberia Operating Corporation | | Oil & Gas Operator | Jan 2003 |
| 71 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 72 | J P Van Way | | Oil & Gas Operator | Dec 2024 |
| 73 | Jennings Holdings, LLC | | Oil & Gas Operator | Dec 2024 |
| 74 | JMR Oil, Inc. | | Oil & Gas Operator | Sep 2006 |
| 75 | JN Expl & Prod LTD Partnership | Billings, MT 59103-0159 | Oil & Gas Operator | Feb 2001 |
| 76 | Jordan Oil Company, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2019 |
| 77 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 78 | Keck Partners | | Oil & Gas Operator | Apr 1989 |
| 79 | Key Operating Company Inc | Duncan, OK 73534-1284 | Oil & Gas Operator | Jan 2025 |
| 80 | La Intrastate Gas Co LLC | | Oil Operator | Apr 2004 |
| 81 | Lakeshore Petroleum Corp. | | Oil & Gas Operator | Dec 1992 |
| 82 | Lamar Oil & Gas, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Dec 2025 |
| 83 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 84 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 85 | Llog Exploration Company, L.L.C. | | Oil & Gas Operator | Sep 2025 |
| 86 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 87 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Dec 2025 |
| 88 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 89 | Maritech Resources, LLC | | Oil & Gas Operator | May 2011 |
| 90 | Martin Exploration Co. | | Oil & Gas Operator | Apr 1986 |
| 91 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 92 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 93 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 94 | Merl Wiggins Et Al | | Oil & Gas Operator | Sep 1996 |
| 95 | Mid Louisiana Gas Company | | Oil & Gas Operator | Oct 2002 |
| 96 | Monterey Pipeline Co. | | Oil Operator | Aug 1993 |
| 97 | Mullins & Prichard | | Oil & Gas Operator | May 1992 |
| 98 | New Century Exploration, Inc. | Spring, TX 77379 | Oil & Gas Operator | Dec 2025 |
| 99 | O'Sullivan Oil & Gas Co., Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2000 |
| 100 | Olympic Production Company | | Oil & Gas Operator | Jul 1994 |