- Bituminous Shale Co.
- John Braithwaite & Co.
- Emmens, Brothers & Co.
- Ferguson & Muschamp
- Charles Humfrey & Son.
- Kimmeridge Oil & Carbon Co. Ltd.
- Kimmeridge Shale and Oil Company
- Sanitary Carbon Co. Ltd.
- Shale Manure & Naptha Co.
- Wanostrocht & Co./South Boghead Co.
- Wareham Oil & Candle Co. Ltd.
- West of England Fire Clay, Bitumen & Chemical Co. Ltd.