| Carbon Underwriting | | |
| Casualty and General Insurance Company Europe Ltd | 00 350 200 47250 | Suite 3a, Centre Plaza, 2 Horse Barrack Lane, Gibraltar, ZZ9 9ZZ |
| Catalina Insurance Ireland Limited (inc Quinn Ins) | 00353 494368622 | Dublin Road, Cavan, ZZ9 9ZZ, Ireland |
| Catalina Worthing Insurance Limited | 01903836800 | 1 Alie Street, London, E1 8DE, United Kingdom |
| CBrown | | |
| Centrica Risk Limited | | |
| Chaucer Insurance | 01227284063 | Prospect House, Chaucer Business Park, Thanet Way, Whitstable, Kent, CT5 3FD, United Kingdom |
| Chaucer Insurance Ireland DAC | | |
| Chester Street Insurance Holdings | 0870 382 3700 | c/o Capita Insurance Services, No 2 The Embankment, Sovereign Street, Leeds, LS1 4HW, United Kingdom |
| Chevanstall Ltd | 0207 780 5888 | R & Q Insurance Services, 110 Fenchurch Street, London, EC3M 5JT, United Kingdom |
