EPT Disclosure

17 May 2006 11:20

Morgan Stanley Securities Ld(EPT)17 May 2006 FORM 38.5 DEALINGS BY CONNECTED EXEMPT PRINCIPAL TRADERS (Rule 38.5 of the City Code on Takeovers and Mergers) 1. KEY INFORMATION Name of exempt principal trader Morgan Stanley Securities LimitedCompany dealt in Cambridge Antibody Technology Group PlcClass of relevant security to which the Ordinary Sharesdealings being disclosed relate (Note 1) Date of dealing 16 May 2006 2. DEALINGS (Note 2) (a) Purchases and sales Total number of securities purchased Highest price paid GBP Lowest price paid GBP 14,035 13.00 12.97 Total number of securities sold Highest price received GBP Lowest price paid received GBP 33,355 13.00 12.98 (b) Derivatives transactions (other than options) Product name, Long/short Number of securities Price per unit GBP e.g. CFDCFD SHORT 31,549 13.00CFD LONG 2,800 13.01 3. OTHER INFORMATION Agreements, arrangements or understandings relating to options or derivatives Full details of any agreement, arrangement or understanding between the person disclosing and any other person relatingto the voting rights of any relevant securities under any option referred to on this form or relating to the votingrights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form isreferenced. If none, this should be stated. NONE Date of disclosure 17 May 2006 Contact name Mandeep Bhandal Telephone number 020 7677 5468 Name of offeree/offeror with which associated Cambridge Antibody Technology Group PlcSpecify category and nature of associate status 6 Advisor Notes The Notes on Form 38.5 can be viewed on the Takeover Panel's website atwww.thetakeoverpanel.org.uk This information is provided by RNS The company news service from the London Stock Exchange