| 1 | General American Oil Co Of TX | | Oil & Gas Operator | Jun 1983 |
| 2 | George R. Brown | | Oil & Gas Operator | Mar 1984 |
| 3 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 4 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 5 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 6 | Goodrich Petroleum Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2022 |
| 7 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 8 | Graham Exploration, LTD. | | Oil & Gas Operator | Oct 1993 |
| 9 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 10 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 11 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 12 | Greenhill Petroleum Corporation | Houston, TX 77077 | Oil & Gas Operator | Jan 1998 |
| 13 | Greka Am Inc | Santa Maria, CA 93454 | Oil & Gas Operator | May 2013 |
| 14 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 15 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 16 | Gulf Production Company, Inc. | | Oil & Gas Operator | Jul 2024 |
| 17 | Gulf South Oil & Gas, Inc. | | Oil & Gas Operator | Feb 1990 |
| 18 | Gulf South Operators, Inc. | New Orleans, LA 70130 | Oil & Gas Operator | Oct 2015 |
| 19 | Gulf South Pipeline Company, LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2020 |
| 20 | Gulfland Resources, Inc. | | Oil & Gas Operator | Aug 1996 |