| 1 | G M G Oil & Gas Corp. | Morris, OK 74445 | Oil & Gas Operator | Sep 2025 |
| 2 | Galt Investment Company LLC | Tulsa, OK 74120-7412 | Oil Operator | Jun 2024 |
| 3 | Gary L. Deaton Corporation | Oklahoma City, OK 73105-3023 | Oil & Gas Operator | Mar 2015 |
| 4 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Aug 2025 |
| 5 | Gatewood Edward J "Bob" | Holdenville, OK 74848 | Oil & Gas Operator | May 2013 |
| 6 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Sep 2025 |
| 7 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 8 | General Trading Co Inc | Carrollton, TX 75011-2309 | Oil Operator | Jul 2017 |
| 9 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 10 | Genesis Petroleum Corporation | Fort Worth, TX 76116-7151 | Oil & Gas Operator | Mar 2011 |
| 11 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 12 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 13 | Gilco Oil Inc | Ada, OK 74820 | Oil & Gas Operator | May 2019 |
| 14 | Gillham Paul | Maud, OK 74854 | Oil & Gas Operator | Apr 2023 |
| 15 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Sep 2025 |
| 16 | GLB Exploration Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 17 | Glenco Oil & Gas Corporation | Wewoka, OK 74884-0727 | Oil & Gas Operator | Sep 2021 |
| 18 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Aug 2025 |
| 19 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 20 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Sep 2025 |
| 21 | Good Vaughn Oil Company LLC | Enid, OK 73702-3744 | Oil & Gas Operator | Jun 2019 |
| 22 | Goodnight & Laird | St Louis, OK 74866 | Oil & Gas Operator | Aug 2025 |
| 23 | Goodrich Larkin M | Konawa, OK 74849-9766 | Oil Operator | Jan 2013 |
| 24 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 25 | Gouker & Harris | Meeker, OK 74855-0685 | Oil Operator | Jan 2013 |
| 26 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Dec 2025 |
| 27 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 28 | Grayhorse Operating Inc | Tulsa, OK 74103-4438 | Oil & Gas Operator | Aug 2025 |
| 29 | Grayson Operating LLC | Ada, OK 74820 | Oil & Gas Operator | Aug 2025 |
| 30 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 31 | Green Operating Company Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 32 | Green'S Drillng & Mud Ser Inc | Konawa, OK 74849 | Oil Operator | Jan 2013 |
| 33 | Greg Hall Oil & Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Aug 2025 |
| 34 | Griffin Well Service Inc | Konawa, OK 74849-9710 | Oil & Gas Operator | Aug 2025 |
| 35 | Gugli Corporation | Byng, OK 74820 | Oil & Gas Operator | Sep 2014 |
| 36 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 37 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 38 | Gulfstream Petroleum Corp | | Oil & Gas Operator | Feb 2002 |