| 1 | Adobe Energy Company | | Oil & Gas Operator | Sep 2010 |
| 2 | Alliance Oil & Gas Co., Inc. | Corinth, TX 76205 | Oil & Gas Operator | Mar 2015 |
| 3 | Alpha Oil & Gas Inc. | | Oil & Gas Operator | Sep 1989 |
| 4 | Alva J. Dixon | | Oil & Gas Operator | Aug 1991 |
| 5 | Alvin & Roger Wilson | | Oil Operator | Dec 2007 |
| 6 | Alvin Wilson, Et Al | | Oil Operator | May 1991 |
| 7 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 8 | Amer. Intl. Petroleum Corp. | | Oil & Gas Operator | Dec 1990 |
| 9 | American Intl Production Inc. | | Oil & Gas Operator | Apr 1993 |
| 10 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 11 | Anderson Operating LLC Of Mississippi | | Oil & Gas Operator | Jul 2018 |
| 12 | Andries Oil Company | | Oil Operator | Jul 2024 |
| 13 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 14 | Arbco, Inc. | | Oil & Gas Operator | Jan 1996 |
| 15 | Ascot Oils, Inc. | | Oil & Gas Operator | Jul 1993 |
| 16 | Aztec Production Company | | Oil & Gas Operator | Jan 1996 |
| 17 | Azul Operating, LLC | | Gas Operator | Jun 2024 |
| 18 | B & E Oil Corporation | | Oil Operator | Sep 1985 |
| 19 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Nov 2024 |
| 20 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 21 | Biggs Resources, Inc. | | Oil Operator | Apr 1984 |
| 22 | Billingsley Engineering Co. | | Oil & Gas Operator | May 1994 |
| 23 | Billy Young | | Oil Operator | Aug 1989 |
| 24 | Black Hawk Resources | | Oil & Gas Operator | Dec 1984 |
| 25 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 26 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2021 |
| 27 | Borden, Inc. | Columbus, OH 43215 | Oil & Gas Operator | Mar 1990 |
| 28 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 29 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Nov 2024 |
| 30 | Brix Operating LLC | | Gas Operator | Apr 2021 |
| 31 | Brown Oil Properties | | Oil Operator | Nov 1983 |
| 32 | C & E Oil Company | Corpus Christi, TX 78418 | Oil Operator | Jan 1989 |
| 33 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Aug 2024 |
| 34 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 35 | C. L. Brown, III | | Oil Operator | Dec 1991 |
| 36 | C. L. Morris, Inc. | | Oil & Gas Operator | Feb 2004 |
| 37 | C. T. & Ted Paul | | Oil Operator | Mar 2019 |
| 38 | C. W. Brumley | | Oil & Gas Operator | Jun 2006 |
| 39 | C.W.F.K., Inc. | | Gas Operator | Dec 1986 |
| 40 | Caddo Oil & Gas Co., Inc. | | Oil Operator | Jul 1990 |
| 41 | Can Do Enterprises | | Oil Operator | Jun 2024 |
| 42 | Carder Oil Company | | Oil & Gas Operator | Jun 2024 |
| 43 | Carraway Co. | | Oil Operator | Apr 2006 |
| 44 | Century Oil, Inc. | | Oil Operator | Apr 2022 |
| 45 | Champlin Petroleum Co. | Rock Springs, WY 82902 | Oil & Gas Operator | Mar 1991 |
| 46 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2024 |
| 47 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 48 | Civego, Inc. | | Oil & Gas Operator | Jul 1994 |
| 49 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Jun 2024 |
| 50 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Nov 2024 |
| 51 | Converse Oil Corp. | | Oil Operator | Dec 2010 |
| 52 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 53 | Cranford Exploration, Inc. | | Oil & Gas Operator | Jul 2002 |
| 54 | D & D Oil Company | Dayton, TX 77535 | Oil & Gas Operator | Nov 2024 |
| 55 | D H & L Operating, Inc. | | Oil & Gas Operator | Sep 1983 |
| 56 | D. B. McConnell | | Oil & Gas Operator | Oct 1991 |
| 57 | Danos Oil & Gas LLC | | Oil & Gas Operator | May 2024 |
| 58 | Decker & Associates | | Oil & Gas Operator | Mar 1991 |
| 59 | Dekasco, Inc. | | Oil & Gas Operator | May 1990 |
| 60 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2024 |
| 61 | Dewco Oil | | Oil Operator | Jun 1996 |
| 62 | Diamar Oil Company, Inc. | | Oil Operator | Nov 1983 |
| 63 | Dilligas, Inc. | | Oil Operator | May 1990 |
| 64 | Don Webb | | Oil Operator | Mar 1984 |
| 65 | Dorothy F. Hamlin | | Oil Operator | Dec 1985 |
| 66 | Dorothy Oil Company | | Oil & Gas Operator | Oct 1994 |
| 67 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Nov 2024 |
| 68 | Ellis M. Moore, Et Al | | Oil Operator | Mar 1986 |
| 69 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Nov 2024 |
| 70 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 71 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 72 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 73 | English Oil & Gas | | Oil Operator | Sep 2021 |
| 74 | English Oil And Gas, L.L.C. | | Oil Operator | Sep 2021 |
| 75 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 76 | Essex Corporation | | Oil Operator | Jan 1983 |
| 77 | Essex Corporation Of Louisiana | | Oil Operator | Dec 1997 |
| 78 | Estate Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2011 |
| 79 | Et Gathering & Processing LLC | San Antonio, TX 78258 | Oil Operator | Jun 2024 |
| 80 | Etoco Incorporated | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 81 | Ettco Enterprises, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2024 |
| 82 | Evans Brothers | | Oil & Gas Operator | Jul 2024 |
| 83 | Faith Oil Company | | Oil Operator | Jun 2024 |
| 84 | Falco S & D, Inc. | Shreveport, LA 71107 | Oil & Gas Operator | Apr 1998 |
| 85 | Fite Oil & Gas, Inc. | Shreveport, LA 71163 | Oil & Gas Operator | Nov 2024 |
| 86 | Floyd Ray Porter | | Oil & Gas Operator | Dec 1986 |
| 87 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 88 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Nov 2024 |
| 89 | Fran Oil, Inc. | | Oil & Gas Operator | Jun 2024 |
| 90 | Freeman Oil | | Oil & Gas Operator | Jun 1995 |
| 91 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 92 | Frontier Exploration, Inc. | | Oil & Gas Operator | Aug 1984 |
| 93 | G&G Productions | | Oil Operator | Jul 2024 |
| 94 | G. R. Goodwill | | Oil & Gas Operator | Jun 1997 |
| 95 | Gaines Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Nov 2024 |
| 96 | Gas Resources, Limited | | Oil & Gas Operator | Jun 2024 |
| 97 | Gas Rock Corporation | | Oil Operator | Mar 1983 |
| 98 | Gep Haynesville II, LLC | | Gas Operator | May 2024 |
| 99 | Gep Haynesville, LLC | | Gas Operator | Dec 2021 |
| 100 | Gerald C. Eddy | | Oil & Gas Operator | Oct 1987 |