- A & T Resources
- Aspire Energy LLC
- Avalon Exploration
- Bandera Petroleum Inc
- Braumiller & Braumiller Inc
- Brighton Energy LLC
- C Mark Crawford Oil & Gas
- Cannon Energy
- Castle-Rock Petroleum Inc
- Challenge Operating Inc
- Chernico Exploration Inc
- Cyanostar Energy Inc
- Daniel H Finnefrock
- Double Eagle Resources
- Exco Resources Inc
- Foxhead Oil & Gas Co
- Garner Energy Inc
- H & S Drilling Co
- Hawkins International
- Kimbrel Oil Corp
- Lawson Petroleum Co
- Lowry Exploration Inc
- Mesa Grande Resources Inc
- Oil Capital Land & Exploration
- Petroleum Development Corp
- Pinon Energy Co
- Rockford Energy Partners
- Rockford Exploration Inc
- Silverado Oil & Gas LLP
- Special Non List
- Spyglass Energy Group
- Strat Land Exploration Co
- Tidemark Exploration Inc
- Tricon Energy
- Xavier Exploration