Oil & Gas Companies in Guadalupe County, TX
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | E-P Oil Co. Inc. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 2 | E. T. Oil Company | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 3 | Eagle Ford Oil Co., Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 4 | Embrey Oil Production Co. | Sutherlnd SPG, TX 78161 | Oil & Gas Operator | Oct 2021 |
| 5 | Emerald Bay Energy, Inc. | San Antonio, TX 78230 | Oil Operator | Oct 2025 |
| 6 | Energon3 | Rowlett, TX 75089 | Oil Operator | Oct 2025 |
| 7 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | Oct 2025 |
| 8 | Engelke, Randall Glen | Luling, TX 78648 | Oil & Gas Operator | Jul 2007 |
| 9 | Enhanced RS, Inc. | Luling, TX 78648 | Oil Operator | Oct 2025 |
| 10 | European-Southwest Co. | Houston, TX 77254 | Oil & Gas Operator | Oct 2025 |
| 11 | Evantech Energy Corp. | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 1995 |
| 12 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
Production numbers shown above are only for Guadalupe County, TX and for the production period listed.