- Condor Operating Co
- Diamond Head Properties
- Great Western Drilling Co
- Grover Family
- James W Lacy Jr
- Jane B Armstrong
- Jbrock Oil
- Kenneth G Cone Oil & Gas
- Lease Operators
- Lease Operators
- Marathon Oil Co
- MVC Inc
- Nedwoc Corp
- Nichols Oil
- Orla Petco Inc
- Paul D Friemel & Assoc Inc
- Pogo Producing Co
- Polaris Production Corp
- R C Banks
- R C Banks
- Sage Energy Co
- Tandem Energy Corp
- Turrentine Oil & Gas
- Wallace Petroleum Investments
- Willow Creek Resources
