| Wellington | | |
| West Bay Insurance PLC | 01227 284700 | Prospect House, Chaucer Business Park , Thanet Way, Whitstable, Kent, CT5 3FD |
| Western Captive Insurance Company Limited | 0035312666000 | Third Floor, The Metropolitan Building, James Joyce Street, Dublin, Z99 9ZZ |
| Westfield Specialty Managing Agency Ltd | 0207 712 7600 | Camomile Court, 23 Camomile Street, London, EC3A 7LL |
| XL Insurance Company SE | 0207 933 7268 | 20 Gracechurch Street, London, EC3V 0BG, United Kingdom |
| XL LM 1209 | | |
| XL London Market Limited | 0207 933 7820 | FAO Luke Bonham, XL House, 70 Gracechurch Street, London, EC3V 0XL, United Kingdom |
| Zenith | | |
| Zurich Insurance Company Limited (UK Branch) | 0800 783 0693 | The Colmore Building, 20 Colmore Circus Queensway,, Birmingham, B4 6AT |
| Zurich Insurance plc (Ireland) | 01 6091341 | Zurich House, Ballsbridge Park, Dublin 4, Dublin, ZZ9 9ZZ |
