| 101 | Godfrey & Riley | | Gas Operator | May 1988 |
| 102 | Goldco Operating LLC | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 103 | Golden Resources Corporation | Dallas, TX 75238 | Oil & Gas Operator | Dec 1998 |
| 104 | Goldking Capital Management, LLC | | Oil & Gas Operator | Nov 2024 |
| 105 | Goldking Onshore Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 106 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 107 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 108 | Goldking-Lakeshore | | Oil & Gas Operator | Oct 1985 |
| 109 | Goldrus Producing Company | Houston, TX 77064 | Oil & Gas Operator | Aug 2009 |
| 110 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 111 | Goldsberry Rodessa, L.L.C. | | Oil & Gas Operator | Nov 1998 |
| 112 | Goldston Oil Corporation | Houston, TX 77257 | Oil & Gas Operator | Jun 2026 |
| 113 | Good Shepard Resources, L.L.C. | | Gas Operator | Dec 2024 |
| 114 | Goodrich Drillers, LLC | | Oil & Gas Operator | Nov 2014 |
| 115 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 116 | Goodrich Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2006 |
| 117 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 118 | Goodrich Petroleum Corporation | | Oil & Gas Operator | Sep 1996 |
| 119 | Goodrich-Anderson | | Oil & Gas Operator | Jul 1988 |
| 120 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Jun 2026 |
| 121 | Gossco, Inc. | | Oil & Gas Operator | Feb 1989 |
| 122 | GPM, Inc. | | Oil & Gas Operator | Jun 1994 |
| 123 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 124 | Grady And Roppolo | | Oil & Gas Operator | Aug 1980 |
| 125 | Graham Energy LTD | Houston, TX 77024 | Oil & Gas Operator | Mar 1994 |
| 126 | Graham Expl LTD-DRLG PRNRSHP | | Oil & Gas Operator | Aug 1984 |
| 127 | Graham Exploration, LTD. | | Oil & Gas Operator | Oct 1993 |
| 128 | Graham Oil And Gas LTD | Covington, LA 70434-3134 | Oil & Gas Operator | Aug 2013 |
| 129 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 130 | Graham-McCormick Oper. PRTSHP. | | Oil & Gas Operator | Aug 1989 |
| 131 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 132 | Grand Gulf Production, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 133 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2026 |
| 134 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2026 |
| 135 | Granja Corporation | | Oil & Gas Operator | Dec 2003 |
| 136 | Gravel & Troegel-Petrofunds | | Oil & Gas Operator | Mar 1984 |
| 137 | Gravtro, Inc. | | Oil Operator | Apr 1986 |
| 138 | Gray Energy Corporation | | Oil & Gas Operator | May 1987 |
| 139 | Grayrock Corp., The | Dallas, TX 75243 | Oil & Gas Operator | Dec 1999 |
| 140 | Grease Exploration Incorporated | | Oil & Gas Operator | Dec 2024 |
| 141 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 142 | Great Scott, Inc. | | Oil & Gas Operator | Oct 1993 |
| 143 | Great Southern - Joe Scates | | Oil Operator | Dec 1979 |
| 144 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 145 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 146 | Great Yellowstone Corporation | | Oil & Gas Operator | Apr 1993 |
| 147 | Green Operating | | Oil Operator | Jun 2010 |
| 148 | Green Production, LLC | | Oil & Gas Operator | Dec 2016 |
| 149 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 150 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 151 | Greer Energy, Inc. | | Oil Operator | Dec 1996 |
| 152 | Greka Am Inc | Santa Maria, CA 93454 | Oil & Gas Operator | May 2013 |
| 153 | Grenadier Energy Partners II,LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2020 |
| 154 | Grey Oil Co | Pratt, KS 67124 | Oil & Gas Operator | Sep 2007 |
| 155 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 156 | Greystone Operating, Inc. | | Oil & Gas Operator | Nov 2009 |
| 157 | Greystone Petroleum, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2026 |
| 158 | Gribble Oil Company | | Oil & Gas Operator | Jun 1996 |
| 159 | Griffin & Griffin Expl, LLC | | Oil & Gas Operator | Dec 2025 |
| 160 | Griffin & Griffin Oil Co Inc | | Oil & Gas Operator | Jun 2001 |
| 161 | Griffin Energy | | Oil & Gas Operator | May 1991 |
| 162 | Griffin Operating | | Oil & Gas Operator | Mar 1995 |
| 163 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 164 | Griffin Southern Corp. | | Oil & Gas Operator | Jun 1983 |
| 165 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2026 |
| 166 | Grigsby-McCord Joint Account | | Oil Operator | Apr 1984 |
| 167 | Grigsby-McCord Joint Acct Etal | | Oil Operator | Apr 1984 |
| 168 | Grit Operating, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2023 |
| 169 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 170 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 171 | Gruy Management Service Co. | | Oil & Gas Operator | Apr 1982 |
| 172 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 173 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 174 | Gryphon Exploration Company | Mandeville, LA 70471 | Oil & Gas Operator | Aug 2009 |
| 175 | GT Energy | | Oil & Gas Operator | Mar 1993 |
| 176 | Guaranty Energy Corp. | | Oil & Gas Operator | Aug 1990 |
| 177 | Guardian Oil Company | | Oil & Gas Operator | Aug 1985 |
| 178 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |
| 179 | Guernsey/Rosbottom | | Oil Operator | Apr 1989 |
| 180 | Guido & Arnold | | Oil & Gas Operator | Feb 1982 |
| 181 | Guido Energy Co & Guernsey Pet | | Oil Operator | Aug 1991 |
| 182 | Gulf Coast Crude O&G Co., Inc. | | Oil & Gas Operator | May 1982 |
| 183 | Gulf Exploration Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 184 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 185 | Gulf Outlet Resources, L.L.C. | | Oil & Gas Operator | Apr 2008 |
| 186 | Gulf Production Company, Inc. | | Oil & Gas Operator | Dec 2024 |
| 187 | Gulf South Minerals, Inc. | | Oil Operator | Nov 1993 |
| 188 | Gulf South Oil & Gas, Inc. | | Oil & Gas Operator | Feb 1990 |
| 189 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 190 | Gulf South Pipeline Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 191 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 192 | Gulf States Exploration Co. | | Oil & Gas Operator | Dec 1983 |
| 193 | Gulf States Pipeline Corp. | | Oil & Gas Operator | May 2003 |
| 194 | Gulf States Production Company | Houston, TX 77027 | Oil & Gas Operator | Aug 1997 |
| 195 | Gulf Tech Energy LLC | | Oil & Gas Operator | Dec 2002 |
| 196 | Gulfland Resources, Inc. | | Oil & Gas Operator | Aug 1996 |
| 197 | Gulfport Energy Corporation | Oklahoma City, OK 73114-5003 | Oil & Gas Operator | Feb 2026 |
| 198 | Gulfstream Of Louisiana, Inc. | | Oil & Gas Operator | Jan 1996 |
| 199 | Gulfstream Petroleum Corp | | Oil & Gas Operator | Feb 2002 |
| 200 | Gulfstream Resources, Inc. | | Oil & Gas Operator | May 1996 |