Holding(s) in Company

IG Group Holdings plc
22 May 2007

22 May 2007



IG Group Holdings Plc - Notification of substantial shareholding





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:



IG Group Holdings Plc



2. Reason for the notification (please place an X inside the appropriate bracket
/s):



An acquisition or disposal of voting rights: ( X )



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 the notification obligation:



REACHCAPITAL MANAGEMENT, LLC



4. Full name of shareholder(s) (if different from 3.):

.................



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

.................



6. Date on which issuer notified:



21/05/2007



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



Above 5%



8. Notified details:

.................



A: Voting rights attached to shares


Class/type of shares if possible              Situation previous to the Triggering transaction
using the ISIN CODE
                                  Number of shares                   Number of voting Rights


Ordinary Shares at 0.005p each    14,699,357                         14,699,357

Resulting situation after the triggering transaction


Class/type of shares if      Number of shares         Number of voting rights           % of voting rights
possible using the ISIN CODE
                             Direct                   Direct       Indirect             Direct      Indirect


Ordinary Shares at 0.005p    18,095,546               18,095,546                        5.53%
each



B: Financial Instruments

Resulting situation after the triggering transaction


Type of         Expiration Date      Exercise/Conversion       Number of voting rights     % of voting rights
financial                            Period/ Date              that may be acquired if the
instrument                                                     instrument is exercised/
                                                               converted.





Total (A+B)
Number of voting rights        % of voting rights


18,095,546                     5.53%



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

.................



Proxy Voting:



10. Name of the 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:

.................



14. Contact name:

Guy Abbi, Company Secretary, IG Group Holdings Plc



15. Contact telephone number:



020 7633 5463


                      This information is provided by RNS
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