Holding(s) in Company

Cambridge Antibody Tech Group PLC
13 July 2006

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

Cambridge Antibody Technology Group plc

2. Name of shareholder having a major interest

Wellington Management Company

3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or 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

Non beneficial

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

Not known

5. Number of shares / amount of stock acquired

N/A

6. Percentage of issued class

N/A

7. Number of shares / amount of stock disposed

Not known

8. Percentage of issued class

Not known

9. Class of security

Ordinary 10 pence shares

10. Date of transaction

Not known

11. Date company informed

12 July 2006

12. Total holding following this notification

Not known

13. Total percentage holding of issued class following this notification

Not known

14. Any additional information

The Company has been notified that Wellington Management Company no longer have
a notifiable interest in the ordinary shares of the Company

15. Name of contact and telephone number for queries

Justin Hoskins, 01223 898589

16. Name and signature of authorised company official responsible for making
this notification

Adrian Kemp, Director

Date of notification

13 July 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.


                   NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Name of company

Cambridge Antibody Technology Group plc

2. Name of shareholder having a major interest

Credit Suisse Securities (Europe) Limited

3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or 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

Non beneficial

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

Not known

5. Number of shares / amount of stock acquired

N/A

6. Percentage of issued class

N/A

7. Number of shares / amount of stock disposed

Not known

8. Percentage of issued class

Not known

9. Class of security

Ordinary 10 pence shares

10. Date of transaction

Not known

11. Date company informed

12 July 2006

12. Total holding following this notification

Not known

13. Total percentage holding of issued class following this notification

Not known

14. Any additional information

The Company has been notified that Credit Suisse Securities (Europe) Limited no
longer have a notifiable interest in the ordinary shares of the Company

15. Name of contact and telephone number for queries

Justin Hoskins, 01223 898589

16. Name and signature of authorised company official responsible for making
this notification

Adrian Kemp, Director

Date of notification

13 July 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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