| 1 | G And H Producers Inc | | Oil Operator | Sep 2004 |
| 2 | G And S Exploration LLC | | Oil Operator | Mar 2016 |
| 3 | Gage Energy And Petroleum Revenue Service Inc | | Gas Operator | Dec 1992 |
| 4 | Gage Energy Inc | | Oil Operator | Nov 2015 |
| 5 | Gas Compression Services Inc | | Gas Operator | Apr 1994 |
| 6 | Gas Ventures LLC | Thermopolis, WY 82443 | Oil & Gas Operator | Oct 2020 |
| 7 | General Energy Resources And Technology Corp | | Oil & Gas Operator | Jan 1998 |
| 8 | General Exploration Inc | | Oil & Gas Operator | Aug 2001 |
| 9 | General Oil Company, Inc. | Wichita, KS 67213 | Oil & Gas Operator | Dec 2025 |
| 10 | Geoseis Inc | | Oil Operator | Oct 1988 |
| 11 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 12 | Gibraltar Energy LLC | | Oil Operator | Aug 2025 |
| 13 | Ginger Oil | | Oil Operator | Sep 2025 |
| 14 | GKM Oil Company | Tulsa, OK 74136 | Oil & Gas Operator | Oct 1991 |
| 15 | Glen Cain Inc | | Oil Operator | Dec 2024 |
| 16 | Global Associates Inc | | Oil & Gas Operator | Oct 1998 |
| 17 | Global Natural Resources | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 18 | Golden Petroleum Corp And Black River Oil Corp | | Oil & Gas Operator | May 2016 |
| 19 | Goodale Enterprises LLC | | Oil & Gas Operator | Sep 2025 |
| 20 | Goodale Jack | | Oil & Gas Operator | Sep 2025 |
| 21 | Gorlewski Resources LLC And C-More Production LLC | | Oil Operator | Sep 2025 |
| 22 | Gout Margaret M Dba Lakeville Gas Associates | | Oil & Gas Operator | Dec 2003 |
| 23 | Great Lakes Niagaran Inc | | Oil & Gas Operator | Mar 1988 |
| 24 | Great Lakes Petroleum Producers Inc | | Oil Operator | Nov 2025 |
| 25 | Greenland Operating LLC | | Oil Operator | Oct 2025 |
| 26 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 27 | Gunner Energy Corp. | Troy, MI 48083 | Oil & Gas Operator | Jun 1995 |
| 28 | Guthrie Clare L And June | | Oil Operator | Nov 2021 |