Oil & Gas Companies in Grimes County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Aeon Operating, Inc. | Fate, TX 75132 | Oil & Gas Operator | Dec 2025 |
| 2 | Akg Operating Company | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 3 | Allied Operating Texas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 4 | Ambrit Energy Corp. | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 5 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 6 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 7 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 8 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 9 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Dec 2025 |
| 10 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 11 | Arledge, Terry | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2019 |
| 12 | Asm Oil & Gas Company, Inc. | Dallas, TX 75367 | Oil & Gas Operator | May 2020 |
| 13 | Atinum Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 14 | Atkinson Energy Corporation | Giddings, TX 78942 | Oil & Gas Operator | Jan 2010 |
Production numbers shown above are only for Grimes County, TX and for the production period listed.