Holding(s) in Company

For filings with the FSA include the annex For filings with issuer exclude the annex TR-1: Notifications of Major Interests in Shares 1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: Serco Group plc 2. Reason for notification [Yes/No] An acquisition or disposal of voting rights Yes An acquisition or disposal of instruments with similar Yes economic effect to qualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to BlackRock, Inc. notification obligation: 4. Full name of shareholder(s) (if different from 3): 5. Date of transaction (and date on 13 July 2011 which the threshold is crossed or reached if different): 6. Date on which issuer notified: 15 July 2011 7. Threshold(s) that is/are crossed or Holding gone below 5% reached: 8: Notified Details A: Voting rights attached to shares Class/type of Situation previous to Resulting situation after shares the triggering the triggering transaction transaction If possible Number of Number of Number Number of Percentage of use shares voting of voting rights voting rights ISIN code rights shares Direct Indirect Direct Indirect GB0007973794 23,491,620 23,491,620 n/a n/a 21,829,389 n/a 4.42% B: Financial Instruments Resulting situation after the triggering transaction Type of Expiration Exercise/ No. of voting Percentage of financial date conversion rights that may be voting rights instrument period/date acquired (if the instrument exercised/ converted) CFD - - 2,015,753 0.42% Total (A+B) Number of voting rights Percentage of voting rights 23,845,142 4.84% 9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable: BlackRock Investment Management (UK) Limited - 23,845,142 (4.84%) 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: Serco Group plc is disclosing this information in accordance with DTR 5.8.12 14 Contact name: Sarah Howfield, Company Secretarial Assistant 15. Contact telephone name: 01256 744272

Companies

Serco Group (SRP)
UK 100

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