- Carnes Oil Corp
- Daniel Resources Development
- Elliott Oil & Gas
- Geo Southern Energy Corp
- Interoil
- Lindon Exploration
- Mid-South Controls
- Mobil Exploration & Producing
- Nearburg Producing Co
- Paradigm Strategic Group
- Preston Oil Co
- Research Petroleum Inc
- Tenkay Resources Inc
- Texas Energy Development Corp
- Thomas Pellegrini
- U S Petroleum Corp
