Notifications of Major Intere

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:

IG Group Holdings 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 notification obligation:

Hound Partners, LLC

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

Hound Partners, LP; Hound Partners Offshore Fund, LP

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

02/07/2008

6. Date on which issuer notified:

04/07/2008

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

3%

8: Notified Details

A: Voting rights attached to shares

Class/type of shares

If possible use ISIN code

GB00B06QFB75

Ordinary Shares at 0.005p each

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of shares

6,841,392

Number of voting rights

6,841,392

Number of shares

7,527,450

Number of voting rights

Percentage of voting rights

Direct

Indirect

7,527,450

Direct

Indirect

2.30%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ conversion period/date 

No. of voting rights that may be acquired (if the instrument exercised/converted)

Percentage of voting rights

CFD

2,782,157

0.85%

Total (A+B)

Number of voting rights

Percentage of voting rights

10,309,607

3.15%

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 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 name:

020 7896 0011