Holding(s) in Company

3i Group PLC 15 August 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: 3i Group plc 2. Reason for the notification: An acquisition or disposal of voting rights 3. Full name of person(s) subject to the notification obligation: Prudential plc group of companies 4. Full name of shareholder(s) (if different from 3): Prudential plc 5. Date of the transaction (and date on which the threshold is crossed or reached if different): 13 August 2007 6. Date on which issuer notified: 15 August 2007 7. Threshold(s) that is/are crossed or reached: 3% 8. Notified details: A: Voting rights attached to shares Class/type Situation previous to the Resulting situation after the triggering transaction of shares triggering transaction if possible Number of Shares Number of Voting Number of Number of voting rights % of voting rights using the Rights shares ISIN CODE Direct Direct Indirect Direct Indirect GB00B1YW4409 Below 3% Below 3% 11,681,660 11,681,660 3% B: Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration date Exercise/ Number of voting % of voting rights instrument Conversion Period rights that may be / Date acquired if the instrument is exercised/ converted. N/A N/A N/A N/A N/A Total (A+B) Number of voting rights % of voting rights 11,681,660 3% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: Prudential plc (parent Company) Proxy Voting: 10. Name of the proxy holder: N/A 11. Number of voting rights proxy holder will cease to hold: N/A 12. Date on which proxy holder will cease to hold voting rights: N/A 13. Additional information: 14. Contact name: Sofia Bernsand 15. Contact telephone number: 020 7975 3228 This information is provided by RNS The company news service from the London Stock Exchange

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3i Group (III)
UK 100

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