Chemical, Oil & Gas Company Index - Z
- Zanos Ltd - Knutsford
Zennergy UK - Selby- Zentech International Ltd. - London
- Zeta-pdm Ltd - Newport (IOW)
- Zetechtics Ltd. - York
- Zinga UK - Irvine
- Zok International Group Ltd. - Midhurst
- Zook Europe Ltd. - Sheffield