| 101 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 102 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Apr 2026 |
| 103 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Apr 2026 |
| 104 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2026 |
| 105 | Fossil Resources, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2017 |
| 106 | Four Diamond Operating, LLC | Kilgore, TX 75662 | Oil Operator | Apr 2026 |
| 107 | Four Square Production, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Aug 2004 |
| 108 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 109 | G N K Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 110 | Garrison Operating, L.L.C. | Tomball, TX 77375 | Oil & Gas Operator | Apr 2026 |
| 111 | Gel Petroleum, Inc. | Bay City, TX 77414 | Oil & Gas Operator | Apr 2026 |
| 112 | GMT Energy Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2005 |
| 113 | Goldsmith, J. Paul | Tyler, TX 75711 | Oil & Gas Operator | Feb 1997 |
| 114 | Goldsmith, Neta R. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2009 |
| 115 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 116 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 117 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 118 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 119 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Feb 2026 |
| 120 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2026 |
| 121 | Graystone Energy Corporation | Judson, TX 75660 | Oil & Gas Operator | Apr 2026 |
| 122 | Greer Exploration Corporation | Shreveport, LA 71118 | Oil & Gas Operator | Jul 2017 |
| 123 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 124 | Gulf States Petro. Corp. | Dallas, TX 75202 | Oil & Gas Operator | Apr 2006 |
| 125 | Harleton Oil & Gas Inc. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2026 |
| 126 | Hawthorn Energy Partners, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 127 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | Apr 2026 |
| 128 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | Apr 2026 |
| 129 | Hill, Bill | Kilgore, TX 75663 | Oil Operator | Mar 2014 |
| 130 | Hilliard Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2009 |
| 131 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 132 | Hooper & Sons Investments Co.Inc | Tenaha, TX 75974 | Gas Operator | Nov 1997 |
| 133 | Hopkins, T. M. Operating Co. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 134 | Hunt Petroleum Corp. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 135 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | Apr 2026 |
| 136 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 137 | Inland Oil And Gas Company, Inc. | Chireno, TX 75937 | Oil & Gas Operator | Jun 2005 |
| 138 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Apr 2026 |
| 139 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 140 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Apr 2026 |
| 141 | Jandar Exploration | Henderson, TX 75653 | Oil & Gas Operator | Dec 1994 |
| 142 | Jandar Exploration, L. C. | Tyler, TX 75703 | Oil & Gas Operator | Apr 2026 |
| 143 | Janex Oil Co., Inc. | Dallas, TX 75219 | Oil & Gas Operator | Jun 2005 |
| 144 | Jet Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2002 |
| 145 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Jan 2026 |
| 146 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2026 |
| 147 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 148 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 149 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 150 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 151 | Keyway Oil & Gas Operating LLC | Kilgore, TX 75663 | Oil Operator | Oct 2020 |
| 152 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Jul 2024 |
| 153 | Layline Energy I LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2019 |
| 154 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2026 |
| 155 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 156 | Linder, John Operating Co., LLC | Gladewater, TX 75647 | Oil & Gas Operator | Apr 2026 |
| 157 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2026 |
| 158 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Apr 2026 |
| 159 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Apr 2026 |
| 160 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Apr 2026 |
| 161 | Magna Oil & Gas Corporation | Irving, TX 75017 | Oil & Gas Operator | Feb 2016 |
| 162 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 163 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 164 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 165 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 166 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 167 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2026 |
| 168 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 169 | McCombs Energy LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2006 |
| 170 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 171 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 172 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2026 |
| 173 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Feb 2026 |
| 174 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 175 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 176 | Miller Energy Inc | Houston, TX 77024 | Oil & Gas Operator | Oct 2016 |
| 177 | Miltuck Operating, Inc. | Elysian Field, TX 75642 | Oil & Gas Operator | Dec 1996 |
| 178 | MJ Energy Company, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2026 |
| 179 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Apr 2026 |
| 180 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2026 |
| 181 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 182 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 183 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Apr 2026 |
| 184 | New Century Exploration, Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2026 |
| 185 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 186 | Newman Corporation | Harleton, TX 75651 | Oil & Gas Operator | Aug 2024 |
| 187 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | Apr 2026 |
| 188 | NFR Energy, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2017 |
| 189 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 190 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Apr 2026 |
| 191 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 192 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 193 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 194 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Apr 2026 |
| 195 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 196 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 197 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
| 198 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 199 | Omimex Petroleum Inc | Fort Worth, TX 76120 | Oil & Gas Operator | Aug 2022 |
| 200 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |