| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 2 | O'Dell, Mitchell | Cross Plains, TX 76443 | Oil & Gas Operator | Nov 2026 |
| 3 | Omni Petroleum Corporation | Austin, TX 78738 | Oil & Gas Operator | Feb 2026 |
| 4 | Osborn Heirs Co | San Antonio, TX 78217 | Oil & Gas Operator | Aug 2026 |
| 5 | Otex LLC | Zephyr, TX 76890 | Oil & Gas Operator | Nov 2026 |
| 6 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 2026 |
| 7 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Nov 2026 |