| 1 | Gaedeke Oil & Gas Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Sep 2023 |
| 2 | Garrison Bros Pipe & Used Equip Inc | Hinton, OK 73047 | Oil & Gas Operator | Aug 2013 |
| 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 | Nov 2025 |
| 5 | Gda Investments Inc | Oklahoma City, OK 73123-0403 | Oil & Gas Operator | Nov 2025 |
| 6 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 7 | Genesis Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 1995 |
| 8 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Nov 2025 |
| 9 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 10 | George H Russell Oil & Gas Investments Inc | Mustang, OK 73064 | Oil & Gas Operator | Oct 2023 |
| 11 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 12 | Gibbs Jr Charles E | Fort Worth, TX 76108-9418 | Oil & Gas Operator | Mar 2015 |
| 13 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 14 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Dec 2025 |
| 15 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2025 |
| 16 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 17 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 18 | Gomaco Operating Company | Tulsa, OK 74115 | Oil & Gas Operator | Dec 2025 |
| 19 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 20 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 21 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 22 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Nov 2025 |
| 23 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 24 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 25 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 26 | Grizzly Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2025 |
| 27 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |
| 28 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 29 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2026 |
| 30 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 31 | Gulfstream Petroleum Corp | | Oil & Gas Operator | Feb 2002 |
| 32 | Gypsy Exploration LLC | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Dec 2014 |