| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Gas Producing Enterprises Inc. | Oil & Gas Operator | Oct 1985 | |
| 2 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 3 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 4 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 5 | Gulf Outlet Resources, L.L.C. | Oil & Gas Operator | Apr 2008 | |
| 6 | Gulf Production Company, Inc. | Oil & Gas Operator | Nov 2023 | |
| 7 | Gulf South Pipeline Company, LP | Houston, TX 77001 | Oil & Gas Operator | Dec 2020 |
| 8 | Gulf States Production Company | Houston, TX 77027 | Oil & Gas Operator | Aug 1997 |