Holding(s) in Company

Hiscox PLC
13 February 2006


                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of listed company

Hiscox plc

2. Name of shareholder having a major interest

Fidelity International Limited (FIL), parent holding company for various direct
and indirect subsidiaries, including Fidelity Investment Services Ltd (FISL) and
Fidelity Pension Management (FPM), investment managers for various non-US
investment companies and institutional clients.

The notifiable interests also comprise the notifiable interest of Mr Edward C
Johnson 3rd, a principal shareholder of Fidelity International Limited.

3. Please state whether notification indicates that it is regarding the holding
of the shareholder named in 2 above; in respect of a nonbeneficial interest; or
in the case of an individual holder if it is a holding of that person's spouse
or children under the age of 18

As 2

4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them

                                Management     No. Shares          Percentage of
Registered Holder                Company       Held                  capital (%)
JP Morgan, Bournemouth             FPM           1,705,893                0.44
State Street Bank and Trust Co     FPM           1,542,805                0.39
London                             
Northern Trust London              FPM           1,488,222                0.38
Citibank London                    FPM             509,302                0.13
HSBC Bank plc                      FPM             403,383                0.10
Bank of New York Brussels          FPM             357,795                0.09
Mellon Bank                        FPM              44,404                0.01
JP Morgan, Bournemouth             FISL         29,380,866                7.50
State Street Bank and Trust Co     FIL             157,285                0.04
London                             
Bank of New York Europe            FII           1,592,665                0.41
London    
JP Morgan Bournemouth              FII           1,466,531                0.37

5. Number of shares / amount of stock acquired

N/A

6 Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)

N/A

7. Number of shares / amount of stock disposed

901,900

8. Percentage of issued class (any treasury shares held by the listed company
should not be taken into account when calculating percentage)

0.23%

9. Class of security

Ordinary 5p shares

10. Date of transaction

Not disclosed

11. Date listed company informed

10 February 2006

12. Total holding following this notification

38,649,151

13. Total percentage holding of issued class following this notification (any
treasury shares held by the listed company should not be taken into account when
calculating percentage)

9.86%

14. Any additional information

The notifiable interests include interest held on behalf of authorised unit
trust schemes in the U.K., notwithstanding the exemption from reporting pursuant
to section 209(1)(h) of the Companies Act 1985.

These notifications of disclosable interests constitute separate notifications
of interest in the shares and are combined solely for the purposes of clarity
and efficiency. Nothing herein should be taken to indicate that Fidelity
International Limited and its direct and indirect subsidiaries or Mr Edward C
Johnson 3rd act as a group or in concert in respect of the disclosed interests,
or that they are required to submit these notifications on a joint basis.

The disclosable interests arise under section 208(4)(b) of the Act, namely where
a person, not being the registered holder, is entitled to exercise a right
conferred by the holding of the shares or to control the exercise of such
rights, or under section 203 of the Act respectively.

15. Name of contact and telephone number for queries

David Taylor, 020 7448 6791

16. Name and signature of duly authorised officer of the listed company
responsible for making this notification

S J Bridges, Company Secretary

Date of notification

13 February 2006

The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.




                      This information is provided by RNS
            The company news service from the London Stock Exchange