| 101 | Hicks Production Co. | | Oil & Gas Operator | Apr 1991 |
| 102 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Apr 2026 |
| 103 | Hilliard Oil & Gas, Inc. | New Orleans, LA 70112 | Oil & Gas Operator | May 2001 |
| 104 | Houma Operating Company, Inc. | | Oil & Gas Operator | Jun 1998 |
| 105 | Houston Energy Operating, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jul 2020 |
| 106 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 107 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 108 | Hughes Eastern Petroleum, Inc. | | Oil & Gas Operator | Apr 1993 |
| 109 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |
| 110 | Hughes-Nicklaus Oil Co., LTD. | | Oil & Gas Operator | Feb 1986 |
| 111 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 112 | Imperial-American Energy,Inc. | | Oil & Gas Operator | Jul 1978 |
| 113 | Jack W. Grigsby | | Oil & Gas Operator | Sep 2001 |
| 114 | James A. Whitson, Jr. | | Oil & Gas Operator | Apr 2016 |
| 115 | JGC Energy Development (USA) Inc. | | Oil & Gas Operator | Aug 2014 |
| 116 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 117 | Kenergy Petroleum Corp | | Oil & Gas Operator | Dec 1982 |
| 118 | Koch Gateway Pipeline Company | | Oil & Gas Operator | Feb 2001 |
| 119 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 120 | Lanoco, Inc. | | Oil & Gas Operator | Sep 2002 |
| 121 | Lastrada Oil And Gas LTD | | Oil & Gas Operator | May 1992 |
| 122 | Laurel Operating Company | Stillwater, OK 74074-3025 | Oil & Gas Operator | Feb 2026 |
| 123 | Lavino Oil And Gas Company | | Oil & Gas Operator | Aug 1989 |
| 124 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 125 | Linder Oil Company,A Partnership | Shreveport, LA 71136 | Oil & Gas Operator | Apr 2026 |
| 126 | Llog Expl. Co. | Metairie, LA 70005 | Oil & Gas Operator | Jan 2003 |
| 127 | Llox, L.L.C. | Covington, LA 70433 | Oil & Gas Operator | Apr 2026 |
| 128 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 129 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 130 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 131 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 132 | Map Drilling Company | | Oil & Gas Operator | Apr 2012 |
| 133 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2026 |
| 134 | Marlin Coastal, L.L.C. | | Oil & Gas Operator | Apr 2008 |
| 135 | Marlin Energy Offshore, L.L.C. | | Oil & Gas Operator | Jun 2006 |
| 136 | Martin Exploration Co. | | Oil & Gas Operator | Apr 1986 |
| 137 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 138 | McCord Exploration Co. | | Oil & Gas Operator | Dec 1990 |
| 139 | McCormick Operating Company | | Oil & Gas Operator | Mar 1984 |
| 140 | McCormick Operating PRTNSHP | | Oil & Gas Operator | Sep 1985 |
| 141 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 142 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 143 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Apr 2026 |
| 144 | McMoran Oil & Gas LLC | New Orleans, LA 70160 | Oil & Gas Operator | Oct 2021 |
| 145 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 146 | Meridian Oil Offshore Inc. | | Oil & Gas Operator | Aug 1996 |
| 147 | Midstates Petroleum Company LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2018 |
| 148 | Millennium Offshore Group, Inc. | Houston, TX 77007 | Oil & Gas Operator | Sep 2005 |
| 149 | Mobil E&P North America Inc. | | Oil & Gas Operator | Jan 1994 |
| 150 | Moco Operating Company | | Oil & Gas Operator | Mar 2002 |
| 151 | Mongrue Oil Company, Inc. | | Oil & Gas Operator | Oct 1999 |
| 152 | Mongrue, Roland, Inc | | Oil & Gas Operator | Mar 1979 |
| 153 | Mullins & Prichard | | Oil & Gas Operator | May 1992 |
| 154 | Nerco Oil & Gas Inc | | Oil & Gas Operator | Dec 1996 |
| 155 | New-Park, Inc. | | Oil Operator | Sep 1990 |
| 156 | Norcen Explorer, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 1998 |
| 157 | Northcott Exploration Co. Inc. | | Oil & Gas Operator | Dec 1987 |
| 158 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Apr 2026 |
| 159 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 160 | Parker & Parsley Devpt L P | | Oil & Gas Operator | Oct 1997 |
| 161 | Patrick Petroleum Corporation | | Oil & Gas Operator | Oct 1984 |
| 162 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 163 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 164 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 165 | PG&E Resources Offshore Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 166 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 167 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 168 | Pintail Oil & Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 169 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Dec 2025 |
| 170 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 171 | Plymouth Resource Group LLC | | Oil & Gas Operator | Dec 1999 |
| 172 | Plymouth Resources Group II Inc | | Oil & Gas Operator | May 2007 |
| 173 | Primary Fuels Inc | Midland, TX 79701-4410 | Oil & Gas Operator | Mar 1991 |
| 174 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 175 | PXP Louisiana L.L.C. | | Oil & Gas Operator | Nov 2010 |
| 176 | Quantum Resources MGMT, LLC | | Oil & Gas Operator | Nov 2014 |
| 177 | Ram Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2012 |
| 178 | Rapiere Resources Company | | Oil & Gas Operator | Aug 2024 |
| 179 | Redman Operating Company | Houston, TX 77042 | Oil & Gas Operator | May 2008 |
| 180 | Reef Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2007 |
| 181 | Reef Exploration, L.P. | Richardson, TX 75080 | Oil & Gas Operator | Apr 2026 |
| 182 | Research Enterprises, Inc. | | Oil Operator | Jan 1996 |
| 183 | Riceland Petroleum Company | | Oil & Gas Operator | Nov 2024 |
| 184 | Ridgelake Energy, Inc. | | Oil & Gas Operator | Jul 2020 |
| 185 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 186 | Rollar Oil Co., Inc. | | Oil & Gas Operator | Jul 1999 |
| 187 | S2 Energy Operating LLC | | Oil & Gas Operator | May 2023 |
| 188 | Sandefer Petroleum Co. | | Oil & Gas Operator | Apr 1994 |
| 189 | Santa Fe Energy Operg Parts LP | | Oil & Gas Operator | Nov 1993 |
| 190 | Serio Exploration Company | | Oil Operator | Jan 1992 |
| 191 | Shoreline Southeast LLC | | Oil & Gas Operator | Jun 2017 |
| 192 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 193 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 194 | Sonat Exploration Gom Inc. | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 195 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 196 | Square Mile Energy, L.L.C. | Houston, TX 77057 | Oil & Gas Operator | Apr 2026 |
| 197 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 198 | Stone Energy Corporation | Denver, CO 80202-2828 | Oil & Gas Operator | Oct 2014 |
| 199 | Sun Exploration And Production Co | | Oil & Gas Operator | Jan 1990 |
| 200 | Sun Texas Company | | Oil & Gas Operator | Jun 1981 |