Holding(s) in Company

SThree plc 07 May 2008 TR-1: Notifications of Major Interests in Shares 1: Identity of the issuer or the underlying issuer SThree PLC of existing shares to which voting rights are attached: 2: Reason for notification (yes/no) An acquisition or disposal of voting rights yes An acquisition or disposal of financial instruments which may result in the acquisition of no shares already issued to which voting rights are attached An event changing the breakdown of voting rights no Other (please specify): no 3: Full name of person(s) subject to notification Standard Life Investments Ltd obligation: 4: Full name of shareholder(s) (if different from Vidacos Nominees 3): 5: Date of transaction (and date on which the 6 May 2008 threshold is crossed or reached if different): 6: Date on which issuer notified: 7 May 2008 7: Threshold(s) that is/are crossed or reached: 13% 8: Notified Details A: Voting rights attached to shares Class/type of share If possible use ISIN code GB00B0KM9T71 Situation previous to the triggering transaction Number of shares Number of voting rights 18,665,318 18,665,318 Resulting situation after the triggering transaction Number of shares Number of voting rights Percentage of voting rights Direct Indirect Direct Indirect 17,013,302 8,098,706 8,914,596 6.142% 6.761% 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) Total (A+B) Number of voting rights Percentage of voting rights 17,013,302 12.903% 9: Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable: Standard Life Investments Ltd Proxy Voting: 10: Name of 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: Alison Kennedy Corporate Governance Manager-Engagement Standard Life Investments Ltd 15: Contact telephone number: (0131) 245 2289 This information is provided by RNS The company news service from the London Stock Exchange

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SThree (STEM)
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