Holding(s) in Company

3i Group PLC
25 January 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:

Initial notification due to change of thresholds for non-material interest

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):

See additional information under 13.

5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

20 January 2007

6. Date on which issuer notified:

24 January 2007

7. Threshold(s) that is/are crossed or reached:

5%

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
GB00B16PV024 23,524,841       23,524,841       23,524,841    23,524,841                    5.09%


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
         23,524,841                     5.09%

9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

See additional information under 13.

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:

                                      Registered Holder                                 Holding           %
Prudential plc                                                                       23,524,841        5.09 Total       
                                                                                                            Notifiable
                                                                                                            Interest
                                      NORTRUST NOMINEE LTD A/C MHF01                     98,043
                                      NORTRUST NOMS LTD                                  14,140
                                      NORTRUST NOMS LTD A/C PUE01                         2,150
                                      NORTRUST NOMS LTD A/C PUS01                        28,384
                                      PRUCLT HSBC GIS NOM(UK) PAC AC                 23,239,454
                                      PRUCLT HSBC GIS NOM(UK) PPL AC                    142,670

M&G Group Limited                                                                    23,524,841        5.09
                                      NORTRUST NOMINEE LTD A/C MHF01                     98,043
                                      NORTRUST NOMS LTD                                  14,140
                                      NORTRUST NOMS LTD A/C PUE01                         2,150
                                      NORTRUST NOMS LTD A/C PUS01                        28,384
                                      PRUCLT HSBC GIS NOM(UK) PAC AC                 23,239,454
                                      PRUCLT HSBC GIS NOM(UK) PPL AC                    142,670

M&G Investment Management Limited                                                    23,398,414        5.07
                                      NORTRUST NOMS LTD                                  14,140
                                      NORTRUST NOMS LTD A/C PUE01                         2,150
                                      PRUCLT HSBC GIS NOM(UK) PAC AC                 23,239,454
                                      PRUCLT HSBC GIS NOM(UK) PPL AC                    142,670

M&G Limited                                                                          23,524,841        5.09
                                      NORTRUST NOMINEE LTD A/C MHF01                     98,043
                                      NORTRUST NOMS LTD                                  14,140
                                      NORTRUST NOMS LTD A/C PUE01                         2,150
                                      NORTRUST NOMS LTD A/C PUS01                        28,384
                                      PRUCLT HSBC GIS NOM(UK) PAC AC                 23,239,454
                                      PRUCLT HSBC GIS NOM(UK) PPL AC                    142,670

The Prudential Assurance Company                                                     23,382,124        5.06
Limited
                                      PRUCLT HSBC GIS NOM(UK) PAC AC                 23,239,454
                                      PRUCLT HSBC GIS NOM(UK) PPL AC                    142,670

Percentage holdings are calculated using an issued share capital of 461,328,861 ORD GBP0.62784
shares





14. Contact name:     Ceris Stafford



15. Contact telephone number:         020 7975 3414




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