| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Oil & Gas Acquisition Group Inc | Austin, TX 78716 | Oil & Gas Operator | May 2003 |
| 2 | Oildigger Resources Fund L LLLP | Billings, MT 59101 | Oil & Gas Operator | Mar 2024 |
| 3 | Oilfield Salvage & Service Company | Littleton, CO 80120 | Oil & Gas Operator | Feb 2024 |
| 4 | Omimex Petroleum Inc (Co) | Newcastle, WY 82701 | Oil & Gas Operator | May 2001 |
| 5 | Omni Operating Company | Osage, WY 82723 | Oil & Gas Operator | Sep 2001 |
| 6 | Osage Hot Oil Service | Newcastle, WY 82701 | Oil & Gas Operator | Jul 1997 |
| 7 | Osage Operating Company LLC | Seattle, WA 98133 | Oil Operator | May 2006 |
| 8 | Osage Partners LLC | Oil & Gas Operator | Mar 2024 | |
| 9 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2023 |
| 10 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |