Holding(s) in Company

18 May 2006 10:54

Cambridge Antibody Tech Group PLC18 May 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 LLP 3. Please state whether notification indicates that it is in respect of holdingof the shareholder named in 2 above or in respect of a non-beneficial interestor in the case of an individual holder if it is a holding of that person'sspouse or children under the age of 18 Non beneficial 4. Name of the registered holder(s) and, if more than one holder, the number ofshares held by each of them Investment Advisor. Names of separate accounts not disclosed. The shares areregistered in the name of the Accounts of the Accounts Custodians or nomineesaccording to their respective holdings. 5. Number of shares / amount of stock acquired not disclosed 6. Percentage of issued class N/A 7. Number of shares / amount of stock disposed not disclosed 8. Percentage of issued class N/A 9. Class of security ordinary 10 pence shares 10. Date of transaction not disclosed 11. Date company informed 16 May 2006 12. Total holding following this notification 2,296,429 13. Total percentage holding of issued class following this notification 4.32% 14. Any additional information The Accounts do not act as a group nor do they act in concert with respect tothe interests in shares. 15. Name of contact and telephone number for queries Justin Hoskins 01223 898589 16. Name and signature of authorised company official responsible for makingthis notification Justin Hoskins Company Secretary Date of notification 17 May 2006 The FSA does not give any express or implied warranty as to the accuracy of thisdocument or material and does not accept any liability for error or omission.The FSA is not liable for any damages (including, without limitation, damagesfor loss of business or loss of profits) arising in contract, tort or otherwisefrom the use of or inability to use this document, or any material contained init, or from any action or decision taken as a result of using this document orany such material. This information is provided by RNS The company news service from the London Stock Exchange