| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Gas Gathering Corp. | Oil Operator | Oct 1997 | |
| 2 | Gas Producing Enterprises Inc. | Oil & Gas Operator | Oct 1985 | |
| 3 | Gas Rock Corporation | Oil Operator | Mar 1983 | |
| 4 | Gde Investments La, L.L.C. | Oil & Gas Operator | Jan 2024 | |
| 5 | Graham Exploration, LTD. | Oil & Gas Operator | Oct 1993 | |
| 6 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 7 | Great Yellowstone Corp. | Oil & Gas Operator | Apr 1993 | |
| 8 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 9 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |