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 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): 3. Full name of person(s) subject to Invesco Limited notification obligation: 4. Full name of shareholder(s) (if N/A different from 3): 5. Date of transaction (and date on 24 August 2012 which the threshold is crossed or reached if different): 6. Date on which issuer notified: 28 August 2012 7. Threshold(s) that is/are crossed or 5%, 10% reached: 8: Notified Details A: Voting rights attached to shares Class/type Situation previous to Resulting situation after of the triggering the triggering transaction shares transaction If possible Number of Number of Number of Number of Percentage of use shares voting shares voting rights voting rights ISIN code rights Ord 2p 24,803,084 24,803,084 Direct Indirect Direct Indirect 49,961,897 10.02% B: Qualifying 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) NominalDelta C: Financial Instruments with similar economic effect to Qualifying Financial Instruments Resulting situation after the triggering transaction Type of Exercise Expiration Exercise/ Number of voting % of voting financial price date Conversion rights instrument rights instrument period refers to Total (A+B+C) Number of voting rights Percentage of voting rights 49,961,897 10.02% 9. Chain of controlled undertakings through which the voting rights and /or the financial instruments are effectively held, if applicable: Invesco Canada Ltd & Invesco Advisers Inc - 17,844 Invesco Asset Management GmbH - 40,441 Invesco Asset Management Dublin - 116,077 Invesco Asset Management Japan - 56,296 Invesco Asset Management Ltd - 18,239,871 Invesco Asset Management Ltd & Invesco Advisers Inc. - 12,149 Invesco PowerShares Capital Management LLC - 41,570 Invesco PowerShares Capital Management Ireland - 407 Invesco Fund Managers Ltd - 31,437,242 Proxy Voting: 10. Name of proxy holder: N/A 11. Number of voting rights proxy N/A holder will cease to hold: 12. Date on which proxy holder will N/A 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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