Oil & Gas Companies in Gregg County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | O.T. Oil | Kilgore, TX 75663 | Oil Operator | Dec 2025 |
| 2 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 3 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 4 | Oily Dog Operators Texas, LLC | Allen, TX 75002 | Oil Operator | Dec 2025 |
| 5 | Oleum Operating Company, L.C. | Longview, TX 75606 | Oil & Gas Operator | Dec 2021 |
| 6 | Optimum Exploration LLC | Dallas, TX 75254 | Oil & Gas Operator | Dec 2025 |
| 7 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 8 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
Production numbers shown above are only for Gregg County, TX and for the production period listed.