Oil & Gas Companies in McMullen County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 2 | Oilton Resources, Inc. | Laredo, TX 78041 | Oil & Gas Operator | Feb 2026 |
| 3 | Omega Energy Corp. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 4 | Omega Energy, LLC | Corpus Chrsti, TX 78418 | Oil & Gas Operator | Feb 2026 |
| 5 | Orca Operating Company LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2025 |
| 6 | Orion Energen Inc. | Austin, TX 78731 | Oil & Gas Operator | Jul 2023 |
| 7 | Orion Resources, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 8 | Orx Resources, L.L.C. | Houston, TX 77067 | Oil & Gas Operator | Feb 2026 |
| 9 | Outline Oil Company LLC | Beeville, TX 78104 | Oil Operator | Feb 2026 |
| 10 | Overly Operating Co. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2013 |
Production numbers shown above are only for McMullen County, TX and for the production period listed.