| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 2 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Feb 2026 |
| 3 | One Tec Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2007 |
| 4 | Oso Energy Company | Houston, TX 77280 | Oil & Gas Operator | Feb 1997 |
| 5 | Ouida Oil | Rowlett, TX 75030 | Oil & Gas Operator | Mar 2008 |