- A & C LTD - HA1 1PQ
- Amax Fire & Security Ltd - HA1 4HX
- Andrews Catering Equipment - HA1 1QD
- Ayman Tyler Associates Accountants - HA1 1BD
- Beta Security - HA1 2RF
- Clini Direct - HA1 2RW
- Cloud Bookkeeping Ltd - HA1 1BD
- Codis - HA1 2AA
- Compubits - HA1 4JE
- Daniel Perry Plumbing & Heating - HA1 4LZ
- Design Presentation Associates, Ltd - HA1 3DL
- Divo Interiors - HA1 1BD
- Ebusiness Online Ltd - HA1 1BA
- Edward J. Wood & Co. (Printers) Ltd - HA1 2SA
- Energy Deployment Company Ltd - HA1 3EX
- G & D Higgins Mechanical Services Ltd - HA1 1UX
- Graydon UK Ltd - HA1 1BE
- Harrow Fencing Suppliers - HA1 3QF
- Harrow Locksmith - HA1 2BQ
- IBU CONSULTING LTD - HA1 1BD
- Lawrence & Co - HA1 1PD
- Lifting365 - HA1 1BD
- Livingston - HA1 4TR
- Meditec International England Ltd - HA1 4QA
- Millennium Fire Protection - HA1 4PA
- Mobility World - HA1 2RX
- Mobility World Ltd - HA1 2RX
- Panmer Ltd - HA1 1UD
- Parliament International Ltd. - HA1 1PD
- Pizza Equipment Ltd - HA1 1QD
- Quiss - HA1 2EN
- Ranks Enterprises Ltd - HA1 4HX
- Sapath Systems - HA1 4EG
- Server Consultancy - HA1 1BD
- Server Consultancy Ltd - HA1 1BD
- shaligram infotech - HA1 1BQ
- Swiftpro Ltd - HA1 2EN
- Temping & Outsourcing Ltd - HA1 1BD
- TG Associates Ltd - HA1 3EX
- W Portsmouth & Co. Ltd - HA1 2HP
- W-Hanson UK - HA1 3QL
- Whitecroft Consultants - HA1 2SZ
- Yasmeen Creative - HA1 1BQ