- Americana Oil & Gas Corp
- Avalon Petroleum Co
- BEAR Exploration Co
- Belco Energy Corp
- Blackwell Energy Group
- Can-Tex Energy Corp
- Chateau Oil & Gas Inc
- Forum Co
- Great West Energy & Exploratn
- Headington Oil Co
- Mercury Oil Co
- Nearburg Producing Co
- OGP Operating Inc
- Pickens Energy Corp
- R M Swesnik
- Riechad USA Inc
- Ventana Exploration
