- Alison Page Marketing - Tring
- Blue Shield - Tring
- Chiltern Hills Watercoolers - Tring
- Controls Testing Equipment Ltd - Tring
- Craven Contracts Ltd - Tring
- Digital Services Ltd - Tring
- Fibre Options Ltd - Tring
- GEC Anderson - Tring
- GS2 Design Limited - Tring
- ICD Controls Limited - Tring
- JAC Groundworks - Tring
- Kendrick Hobbs - Tring
- Power Rod - Tring
- Proactive Technical Training - Tring
- Satellite Creative Ltd - Tring
- Sonoco ThermoSafe - Tring
- Stokvis Tapes - Tring
- T W Generators Ltd - Tring
- T. Clubb & Son Ltd - Tring
- Vanarama - Tring
- Vantage IT Solutions Ltd - Tring
- W D E Consulting - Tring
- Walther Couplings - Tring
- Whistlebrook - Tring