| 1 | G & B Tank Truck Service | Binger, OK 73009 | Oil & Gas Operator | Jan 2008 |
| 2 | G M Oil Properties Inc | Eufaula, OK 74432-0841 | Oil & Gas Operator | Feb 2012 |
| 3 | Galaxy Energy Inc | Stigler, OK 74462-0733 | Gas Operator | Jan 2024 |
| 4 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 5 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 6 | Germany Operating Company | Houston, TX 77090 | Oil & Gas Operator | Sep 2011 |
| 7 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 8 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 9 | Gla Inc | Norman, OK 73070 | Oil & Gas Operator | Jan 2024 |
| 10 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2024 |
| 11 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2024 |
| 12 | Glenwood Operating LLC | | Gas Operator | Jan 2024 |
| 13 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 14 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 15 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 16 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 17 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | May 2024 |
| 18 | Great Yellowstone Corp. | | Oil & Gas Operator | Apr 1993 |
| 19 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Feb 2024 |
| 20 | Greg Hall Oil & Gas LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2024 |
| 21 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |