| 1 | G & C Petroleum Inc | Yale, OK 74085-2502 | Oil & Gas Operator | Mar 2025 |
| 2 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Mar 2025 |
| 3 | Gastar Exploration LLC | Tulsa, OK 74136-1921 | Oil & Gas Operator | Feb 2025 |
| 4 | Gem Oil Company | Albany, TX 76430 | Oil & Gas Operator | Sep 2002 |
| 5 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 6 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Feb 2025 |
| 7 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 8 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 9 | Get Pumping LLC | Drummond, OK 73735 | Oil & Gas Operator | Jan 2025 |
| 10 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 11 | Getty Reserve Oil, Inc. | White Plains, NY 10650 | Oil & Gas Operator | Mar 2005 |
| 12 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Mar 2025 |
| 13 | GK Production LLC | Perry, OK 73077 | Oil Operator | Jul 2024 |
| 14 | Glacier Petroleum Co Okla Inc | Edmond, OK 73013-1977 | Oil & Gas Operator | Mar 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 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 18 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2025 |
| 19 | Gomaco Inc | Tulsa, OK 74103-5061 | Oil & Gas Operator | Apr 2015 |
| 20 | Goodspeed Brenda K | Garber, OK 73738-5401 | Oil & Gas Operator | Nov 1998 |
| 21 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 22 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 23 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 24 | Grand Lake Resources | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2025 |
| 25 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Dec 2020 |
| 26 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Jun 2025 |
| 27 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 28 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2025 |
| 29 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2025 |
| 30 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 31 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 32 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 33 | Grubb F W "Forest" | Garber, OK 73738-0186 | Oil & Gas Operator | Jun 2005 |
| 34 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 35 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 36 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 37 | Gulfstream Petroleum Corp. | | Oil & Gas Operator | Feb 2002 |
| 38 | Gungoll Carl E Estate | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Aug 2000 |
| 39 | Gungoll Henry H. Associates | Enid, OK 73701 | Oil & Gas Operator | Jan 2024 |
| 40 | GW Petroleum Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 1993 |