Holding(s) in Company

Hiscox PLC
10 August 2006


                    NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of listed company

Hiscox plc

2. Name of shareholder having a major interest

Amvescap plc

3. Please state whether notification indicates that it is regarding the holding
of the shareholder named in 2 above; in respect of a non-beneficial 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

Amvescap plc and subsidiary companies on behalf of discretionary clients

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

Not disclosed

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

700,261

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

0.18%

9. Class of security

Ordinary 5p Shares

10. Date of transaction

9 August 2006

11. Date listed company informed

10 August 2006

12. Total holding following this notification

Not disclosed

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)

Not disclosed

14. Any additional information

Amvescap plc and subsidiary companies on behalf of discretionary clients no
longer has a notifiable interest in Hiscox plc.

None of the shares are beneficially owned by Amvescap plc. Subsidiary companies
of Amvescap plc have a large number of portfolio management clients for whom
they act as investment manager and investment advisor and by virtue of Section
203 of the Companies Act 1985 Amvescap plc is deemed to have the same interest
in the shares.

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

10 August 2006

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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
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