Notification of Interests

SThree plc 17 December 2007 Form TR-1 with annex. FSA Version 2.1 updated April 2007 For filings with the FSA include the annex For filings with issuer exclude the annex TR-1: Notifications of Major Interests in Shares Sthree Plc 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: 2. Reason for notification (yes/no) Yes An acquisition or disposal of voting rights An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached An event changing the breakdown of voting rights Other (please specify): JPMorgan Chase & Co 3. Full name of person(s) subject to notification obligation: J.P. Morgan Investment Management Inc. 4. Full name of shareholder(s) (if different from JPMorgan Asset Management (Japan) Limited 3): JPMorgan Asset Management (UK) Limited 12 December 2007 5. Date of transaction (and date on which the threshold is crossed or reached if different): 14 December 2007 6. Date on which issuer notified: 5% 7. Threshold(s) that is/are crossed or reached: 8: Notified Details A: Voting rights attached to shares Class/type of Situation previous to the Resulting situation after the triggering transaction shares triggering transaction Number of Number of Number of Number of voting Percentage of voting If possible use shares voting rights shares rights rights ISIN code Direct Indirect Direct Indirect GB00B0KM9T71 7,021,061 7,021,061 6,345,271 6,345,271 4.59% B: Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration date Exercise/ conversion No. of voting rights Percentage of voting instrument period/date that may be acquired rights (if the instrument exercised/converted) N/A Total (A+B) Number of voting rights Percentage of voting rights 6,345,271 4.59% 9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable: Total disclosable holding for JPMorgan Chase & Co. : 6,345,271 (4.59%) J.P. Morgan Investment Management Inc. JPMorgan Asset Management (Japan) Limited JPMorgan Asset Management (UK) Limited Proxy Voting: 10. Name of proxy holder: N/A 11. Number of voting rights proxy holder will cease N/A to hold: 12. Date on which proxy holder will cease to hold N/A voting rights: 13. Additional information: Please note the group has other holdings which are covered by exemptions. 14 Contact name: Tracey Young 15. Contact telephone name: 020 7325 4513 For notes on how to complete form TR-1 please see the FSA website. Note: Annex should only be submitted to the FSA not the issuer Annex: Notification of major interests in shares A: Identity of the persons or legal entity subject to the notification obligation Full name JPMorgan Chase & Co (including legal form of legal entities) Contact address 270 Park Avenue, New York, NY10017 (registered office for legal entities) Phone number & email 001 212 270 6000 Other useful information N/A (at least legal representative for legal persons) B: Identity of the notifier, if applicable Full name Tracey Young Contact address JPMorgan Chase, 13th Floor, 125 London Wall, London, EC2Y 5AJ Phone number & email 020 7325 4513 tracey.l.young@jpmorgan.com Other useful information N/A (e.g. functional relationship with the person or legal entity subject to the notification obligation) C: Additional information N/A This information is provided by RNS The company news service from the London Stock Exchange

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