Blocklisting Interim Review

SThree plc 20 August 2007 BLOCKLISTING SIX MONTHLY RETURN Information provided on this form must be typed or printed electronically. To: The FSA Date: 20 August 2007 1. Name of applicant: SThree plc 2. Name of scheme SThree Executive Share Option Scheme (ESOS) and LTIP 3. Period of return: From 21 February 2007 To 20 August 2007 4. Balance under scheme from previous return: 102,000 Ordinary Shares (ESOS) 5. The amount by which the block scheme has been increased, if the scheme has been increased since the date of the last return 2,000,000 Ordinary Shares (LTIP) 6. Number of securities issued/allotted under scheme during period: 4,500 Ordinary Shares (ESOS) 7 Balance under scheme not yet issued/allotted at end of period 97,500 Ordinary Shares (ESOS) 2,000,000 Ordinary Shares (LTIP) 8. Number and class of securities originally listed and the date of admission 129,500 Ordinary Shares on 16 August 2006 (ESOS) 2,000,000 Ordinary Shares on 7 March 2007 (LTIP) 9. Total number of securities in issue at the end of the period 138,477,163 Ordinary Shares Name of contact Steven Hornbuckle, Company Secretary Address of contact SThree plc, 41-44 Great Windmill St, London, W1D 7NB Telephone number of contact 020 7292 3838 Signed by Steven Hornbuckle, Company Secretary for and on behalf of Name of applicant SThree plc If you knowingly or recklessly give false or misleading information you may be liable to prosecution. 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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