| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | G L M Company | Oil Operator | Dec 2025 | |
| 2 | Gable Oil Co. | Chase, KS 67524 | Oil Operator | Sep 1998 |
| 3 | Garfield Oil Com | Gas Operator | Jan 1984 | |
| 4 | Gas Chasers Inc. | Claflin, KS 67525 | Gas Operator | Dec 2009 |
| 5 | Geoson Oil Compa | Oil Operator | Jun 1984 | |
| 6 | Gilbert-Stewart Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 7 | Gilmore Tank Service | Chase, KS 67524 | Oil Operator | Apr 2005 |
| 8 | Givens, Bret | Hutchinson, KS 67501 | Oil Operator | Oct 2025 |
| 9 | Glacier Petroleu | Oil & Gas Operator | Nov 1995 | |
| 10 | Globe Exploratio | Oil & Gas Operator | Jun 1995 | |
| 11 | GPS Oil Lease Operations | Inman, KS 67546 | Oil Operator | Jun 2001 |
| 12 | Graber Oil | Hutchinson, KS 67502 | Oil & Gas Operator | Oct 2018 |
| 13 | Graham-Michaelis | Oil & Gas Operator | Nov 1996 | |
| 14 | GRB Resources | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2004 |
| 15 | Gusher Oil | Oil Operator | Jul 2004 |