| 1 | Adco Producing Company | | Oil & Gas Operator | Mar 1989 |
| 2 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Feb 2025 |
| 3 | American Petrofina Co Of Texas | | Oil & Gas Operator | Jun 1985 |
| 4 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 5 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 6 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Feb 2025 |
| 7 | Axis Onshore, LLC | | Oil & Gas Operator | Apr 2008 |
| 8 | Axis Onshore, LP | | Oil & Gas Operator | Dec 2010 |
| 9 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Jun 2024 |
| 10 | Bonanza Salvage & Prod. Co Inc | | Oil & Gas Operator | Sep 2005 |
| 11 | Briggs Operating Company | | Oil & Gas Operator | Nov 1998 |
| 12 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 13 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 14 | Carl W Jones Et Al | | Oil & Gas Operator | Jul 1995 |
| 15 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2025 |
| 16 | CNR Resources, Inc. | Houston, TX 77002-4103 | Oil & Gas Operator | May 2005 |
| 17 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2025 |
| 18 | Colorado Oil Co., Inc. | | Oil & Gas Operator | Dec 1977 |
| 19 | Colt Energy Inc | Iola, KS 66749 | Oil & Gas Operator | Oct 2024 |
| 20 | Concor Petroleum, Inc. | | Oil & Gas Operator | Feb 1983 |
| 21 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 22 | Crystal Oil And Land Company | | Oil & Gas Operator | May 1992 |
| 23 | Crystal Oil Company | Shreveport, LA 71120 | Oil & Gas Operator | Jul 1995 |
| 24 | CSC Energy Corp. | | Oil & Gas Operator | Dec 2009 |
| 25 | Dave Easom Production Co. Inc. | | Oil & Gas Operator | May 2000 |
| 26 | Daybreak Oil And Gas, Inc. | | Oil & Gas Operator | Nov 2024 |
| 27 | Denbury Onshore, LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 28 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 29 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 30 | E. L. Larry | | Oil & Gas Operator | Mar 1989 |
| 31 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 32 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 33 | Ergon Exploration, Inc. | | Oil & Gas Operator | Jun 2023 |
| 34 | Exchange Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1987 |
| 35 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 36 | Fi-Ro Corporation | Natchez, MS BADADDR | Oil & Gas Operator | Nov 2001 |
| 37 | Fina Oil And Chemical Company | Dallas, TX 75221 | Oil & Gas Operator | May 2019 |
| 38 | Fisher Joint Venture | | Oil & Gas Operator | Oct 1998 |
| 39 | Fortenbery Drilling Co., Inc. | | Oil & Gas Operator | Oct 1979 |
| 40 | Foster-Brown Operations, Inc. | | Oil & Gas Operator | Apr 2003 |
| 41 | G M Piggott, Jr | | Oil & Gas Operator | Nov 1985 |
| 42 | Genmar Oil & Gas, Inc. | | Oil & Gas Operator | May 1986 |
| 43 | George L Wilhite,SR. | | Oil Operator | Oct 1981 |
| 44 | Gladney Energy Partners, LLC | | Oil & Gas Operator | Jun 2024 |
| 45 | Gravel & Troegel-Petrofunds | | Oil & Gas Operator | Mar 1984 |
| 46 | Guaranty Energy Corporation | | Oil & Gas Operator | Aug 1990 |
| 47 | Guido & Arnold | | Oil & Gas Operator | Feb 1982 |
| 48 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 49 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 50 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 51 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 52 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Nov 2024 |
| 53 | Hughes Eastern Petroleum, LTD. | | Oil & Gas Operator | Jun 1986 |
| 54 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 55 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 56 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Feb 2025 |
| 57 | J-B Swabbing Co. | | Oil & Gas Operator | Jun 1984 |
| 58 | J-Lu LTD Co | Ashdown, AR 71822 | Oil Operator | Nov 2024 |
| 59 | Jack L. Phillips | | Oil & Gas Operator | Aug 1994 |
| 60 | Jerry P Ogden | | Oil & Gas Operator | Dec 2008 |
| 61 | Jimmy Roberson Energy Corp. | Texarkana, TX 75503 | Oil & Gas Operator | Sep 2012 |
| 62 | John W. McGowan | | Oil & Gas Operator | Jun 1991 |
| 63 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Oct 2024 |
| 64 | Justiss-Mears Oil Co., Et Al | | Oil & Gas Operator | Feb 1981 |
| 65 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 66 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 67 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 68 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 69 | L P C Energy, Inc. | | Oil & Gas Operator | Mar 1985 |
| 70 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 71 | Liberty Oil And Gas Corp. | Olney, IL 62450-2489-2489 | Oil & Gas Operator | Dec 2021 |
| 72 | Locust Ridge Gas Company | | Oil Operator | Mar 2003 |
| 73 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 74 | Lyle Cashion Company | | Oil & Gas Operator | Sep 1989 |
| 75 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 76 | Map Oil Co. | | Oil Operator | Jan 1978 |
| 77 | Marlin Expl.,Inc&Exchg O&G Co | | Oil & Gas Operator | Jun 1987 |
| 78 | Marlin Exploration, LLC | | Oil & Gas Operator | Dec 2024 |
| 79 | Marlin Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Jul 2024 |
| 80 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 81 | McConathy Production Co.,Inc. | | Oil & Gas Operator | Jun 1990 |
| 82 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 83 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 84 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Feb 2025 |
| 85 | McRae Oil Corporation | | Oil & Gas Operator | Mar 1984 |
| 86 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 87 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2025 |
| 88 | Monsanto Oil Company | | Oil & Gas Operator | Apr 1986 |
| 89 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 90 | Nelson Oil & Gas, Inc. | | Oil & Gas Operator | Aug 1995 |
| 91 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 92 | Oakland Corporation | | Oil & Gas Operator | Dec 1981 |
| 93 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 94 | Paladin Petroleum III, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Feb 2025 |
| 95 | Pennzenergy Explor & Prod LLC | | Oil & Gas Operator | Dec 1999 |
| 96 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 97 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 98 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 99 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 100 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |