- A-1 Oil Operators
- Aethon-1 LP
- Arrow Energy
- Bel-Ray Co
- Charles A Neal & Co
- Citation Oil & Gas
- Deisenroth Gas Products Inc
- Derrick Resources
- Gill Royalty Co
- High-Mcdonald Operating Co
- Landers & Musgrove
- Maggard Supply & Oil Co
- Nadel & Gussman
- Nance Petroleum Corp
- Nance Petroleum Corp
- Noble Resources Inc
- Questar Exploration & Prdctn
- R M Speir Operating Co
- Robinowitz Oil Co
- Ronnie Gaskins Oil Productions
- Schlumberger
- Sunraz Color Flames Oil Lamps
- Synergy Oil LLC