| 1 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Mar 2025 |
| 2 | Gamma Resources Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2017 |
| 3 | Ganer Mark Oil & Gas | Owasso, OK 74055 | Oil & Gas Operator | Aug 2005 |
| 4 | Garr-Woolley Oil Company | Oklahoma City, OK 73142-6019 | Oil & Gas Operator | Nov 1995 |
| 5 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Feb 2025 |
| 6 | Geno Oil & Gas Corp | | Oil & Gas Operator | Sep 2009 |
| 7 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 8 | Geoex Resources Inc | | Oil & Gas Operator | Jan 1997 |
| 9 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 10 | Giant Petroleum Corp | Jefferson, OH 44047 | Oil & Gas Operator | Dec 1990 |
| 11 | Gibson Les | Welty, OK 74833 | Oil & Gas Operator | Feb 2025 |
| 12 | Gill Jet C Dba Jetco Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Dec 2023 |
| 13 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 2025 |
| 14 | Glacier Petroleum Co., Inc. | Emporia, KS 66801 | Oil & Gas Operator | Feb 2025 |
| 15 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 16 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 17 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 18 | Goodnight C A Dba C & M Oil Company | Tecumseh, OK 74873-4825 | Oil Operator | Jan 2013 |
| 19 | Gordon Brothers Oil Company | Stroud, OK 74079 | Oil & Gas Operator | Jul 2017 |
| 20 | Gordon Robert Oil Company | Stroud, OK 74070-0366 | Oil & Gas Operator | Jul 2001 |
| 21 | GPM Gas Corp | Oklahoma City, OK 73102-5627 | Oil & Gas Operator | Nov 1998 |
| 22 | Gray Oil & Gas Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2013 |
| 23 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Feb 2025 |
| 24 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2025 |
| 25 | Greer Tom R | Ponca City, OK 74602-2444 | Oil & Gas Operator | May 2013 |
| 26 | Griebel-Valliquette | Stroud, OK 74079-0231 | Oil & Gas Operator | Aug 2016 |
| 27 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 28 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 29 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2025 |
| 30 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |