SThree plc 15 June 2007 TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: SThree PLC - GB00B0KM9T71................. 2. Reason for the notification (please place an X inside the appropriate bracket /s): An acquisition or disposal of voting rights: ( Yes ) An acquisition or disposal of financial instruments which may result in the acquisition of shares already issued to which voting rights are attached: ( N/A ) An event changing the breakdown of voting rights: ( N/A ) Other (please specify) : ( N/A ) ................. 3. Full name of person(s) subject to the notification obligation: UBS Investment Bank................. 4. Full name of shareholder(s) (if different from 3.) : UBS AG London Branch................. 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 12th June 2007................. 6. Date on which issuer notified: 14th June 2007................. 7. Threshold(s) that is/are crossed or reached: 5.29%................. 8. Notified details: ................. A: Voting rights attached to shares Class/type of shares if possible Situation previous to the Triggering transaction using the ISIN CODE Number of shares Number of voting Rights GB00B0KM9T71 6,873,902 6,873,902 Resulting situation after the triggering transaction Class/type of shares if Number of shares Number of voting rights % of voting rights possible using the ISIN CODE Direct Direct Indirect Direct Indirect 7,332,868 7,332,868 - 5.29% B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Date Exercise/Conversion Number of voting rights % of voting rights financial Period/ Date that may be acquired if the instrument instrument is exercised/ converted. - - - - - Total (A+B) Number of voting rights % of voting rights 7,332,868 5.29% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable : UBS AG London Branch - 7,332,868 - 5.29%................. Proxy Voting: 10. Name of the proxy holder: ................. 11. Number of voting rights proxy holder will cease to hold: ................. 12. Date on which proxy holder will cease to hold voting rights: ................. 13. Additional information: ................. 14. Contact name: Angela Huff, Associate Director. UBS AG................. 15. Contact telephone number: 020 7568 4981................. This information is provided by RNS The company news service from the London Stock Exchange