Holding(s) in Company

Hiscox PLC
20 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

Registered Holder                    Management     No. Shares    Percentage of
                                       Company        Held         capital (%)
JP Morgan, Bournemouth                   FPM       1,705,893          0.44
State Street Bank and Trust Co London    FPM       1,639,205          0.42
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         330,695          0.08
Mellon Bank                              FPM          44,404          0.01
JP Morgan, Bournemouth                  FISL      24,433,866          6.23
State Street Bank and Trust Co London    FIL         157,285          0.04
Bank of New York Europe London           FII       1,592,665          0.41
JP Morgan, Bournemouth                   FII       1,210,531          0.31


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

5,133,700


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

1.31%


9. Class of security

Ordinary 5p shares


10. Date of transaction

Not disclosed


11. Date listed company informed

20 February 2006


12. Total holding following this notification

33,515,451


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)

8.55%


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

20 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.




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