| 1 | G. B. & F. Exploration, Inc. | | Oil & Gas Operator | Feb 1991 |
| 2 | Gap Energy, Inc. | | Oil & Gas Operator | Oct 1995 |
| 3 | Gde Investments La, L.L.C. | | Oil & Gas Operator | Jan 2024 |
| 4 | General American Oil Co Of TX | | Oil & Gas Operator | Jun 1983 |
| 5 | General Atlantic Energy Corp. | | Oil & Gas Operator | Nov 1988 |
| 6 | General Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jun 1993 |
| 7 | George R. Brown | | Oil & Gas Operator | Mar 1984 |
| 8 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 9 | Glasscock Drilling, Inc. | | Oil & Gas Operator | Dec 1977 |
| 10 | Goldking Onshore Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2016 |
| 11 | Goldking Operating Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2007 |
| 12 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 13 | Goodrich Oil Company | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2001 |
| 14 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 15 | Graham Exploration, LTD. | | Oil & Gas Operator | Oct 1993 |
| 16 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 17 | Graham-McCormick Oper. PRTSHP. | | Oil & Gas Operator | Aug 1989 |
| 18 | Grease Exploration Incorporated | | Oil & Gas Operator | Nov 2023 |
| 19 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 20 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 21 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 22 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 23 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 24 | Gulfport Energy Corporation | Oklahoma City, OK 73134-5003 | Oil & Gas Operator | Feb 2024 |