Holding(s) in Company

London Stock Exchange Group PLC
15 June 2006

                   NOTIFICATION OF MAJOR INTERESTS IN SHARES



1. Name of company



London Stock Exchange Group plc


2. Name of shareholder having a major interest


Barclays PLC through the legal entities below:                                                    Holding



Barclays Private Bank and Trust Ltd                                                                 1,806

Barclays Capital Inc                                                                              131,922

Gerrard Ltd                                                                                           375

Barclays Global Investors, N.A.                                                                 1,187,286

Barclays Life Assurance Co Ltd                                                                    254,444

Barclays Global Investors Canada Ltd                                                               10,240

Barclays Bank PLC                                                                               5,309,027

Barclays Capital Securities Ltd                                                                   814,612

Barclays Global Fund Advisors                                                                     908,843

Barclays Global Investors Japan Ltd                                                                16,051

Barclays Global Investors Japan Trust & Banking                                                   188,243

Barclays Global Investors Ltd                                                                   2,374,165

Barclays Global Investors Australia Ltd                                                            14,474



3. Please state whether notification indicates that it is in respect of holding
of the shareholder named in 2 above or in respect of a non-beneficial interest
or in the case of an individual holder if it is a holding of that person's
spouse or children under the age of 18



Not disclosed



4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them


Registered Holder                                                                                 Holding

Bank of New York                                                                                   11,339

Barclays Capital Nominees Limited                                                               5,309,027

Barclays Capital Nominees Limited                                                                 483,929

Barclays Capital Nominees Limited                                                                 330,683

Barclays Capital Nominees Limited                                                                 131,922

Barclays Global Investors Canada                                                                   10,240

Boiss Nominees Ltd                                                                                129,886

Chase Nominees Ltd                                                                                105,540

Chase Nominees Ltd                                                                                 70,992

Clydesdale Nominees HGB0225                                                                         1,806

Investors Bank and Trust Co.                                                                        8,076

Investors Bank and Trust Co.                                                                            1

Investors Bank and Trust Co.                                                                      830,187

Investors Bank and Trust Co.                                                                            1

Investors Bank and Trust Co.                                                                      166,411

Investors Bank and Trust Co.                                                                        1,471
Investors Bank and Trust Co.
                                                                                                   15,613
Investors Bank and Trust Co.
                                                                                                    2,596
Investors Bank and Trust Co.
                                                                                                   27,225
Investors Bank and Trust Co.
                                                                                                    9,575
Investors Bank and Trust Co.
                                                                                                   17,759
Investors Bank and Trust Co.
                                                                                                    5,385
Investors Bank and Trust Co.
                                                                                                  845,647
Investors Bank and Trust Co.
                                                                                                   49,735
JP Morgan (BGI Custody)
                                                                                                   58,958
JP Morgan (BGI Custody)
                                                                                                  124,494
JP Morgan (BGI Custody)
                                                                                                1,969,911
JP Morgan (BGI Custody)
                                                                                                  168,828
JP Morgan Chase Bank
                                                                                                   14,474
JP Morgan Chase Bank
                                                                                                   17,477
JP Morgan Chase Bank
                                                                                                   17,201
JP Morgan Chase Bank
                                                                                                   21,930
JP Morgan Chase Bank
                                                                                                    5,691
JP Morgan Chase Bank
                                                                                                    1,597
JP Morgan Chase Bank
                                                                                                      660
JP Morgan Chase Bank
                                                                                                    1,424
JP Morgan Chase Bank
                                                                                                    9,804
JP Morgan Chase Bank
                                                                                                   90,539
JP Morgan Chase Bank
                                                                                                    1,601
JP Morgan Chase Bank
                                                                                                   23,326
JP Morgan Chase Bank
                                                                                                    9,430
JP Morgan Chase Bank
                                                                                                    5,142
Mellon Trust - US Custodian /
                                                                                                   11,128
Mitsui Asset
                                                                                                    2,605
R C Greig Nominees Limited GP1
                                                                                                      375
State Street Boston
                                                                                                   88,289
Trust & Custody Services Bank
                                                                                                    1,558



5. Number of shares / amount of stock acquired



Not disclosed


6. Percentage of issued class



Not disclosed


7. Number of shares / amount of stock disposed



Not disclosed


8. Percentage of issued class



Not disclosed


9. Class of security



Ordinary Shares



10. Date of transaction



Not disclosed



11. Date company informed



14 June 2006


12. Total holding following this notification



11,211,488


13. Total percentage holding of issued class following this notification



5.20%


14. Any additional information



N/A


15. Name of contact and telephone number for queries



Lisa Condron, 020 7797 3517


16. Name and signature of authorised company official responsible for making
this notification



Lisa Condron


Date of notification



15 June 2006


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