Holding(s) in Company

London Stock Exchange Group PLC
04 October 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



Gerrard Ltd                                                                 375
Barclays Capital Securities Ltd                                       1,430,849
Barclays Global Fund Advisors                                           814,519
Barclays Capital Inc                                                     41,809
Barclays Global Investors Canada Ltd                                     11,631
Barclays Global Investors, N.A.                                       1,115,252
Barclays Global Investors Japan Ltd                                      15,391
Barclays Private Bank and Trust Ltd                                       1,806
Barclays Life Assurance Co Ltd                                          249,813
Barclays Bank PLC                                                     6,615,941
Barclays Global Investors Australia Ltd                                  14,120
Barclays Global Investors Ltd                                         2,181,495
Barclays Global Investors Japan Trust & Banking                         188,118



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                                   6,615,941
Barclays Capital Nominees Limited                                   1,430,849
Barclays Capital Nominees Limited                                      41,809
Boiss Nominees Ltd                                                    204,037
Barclays Global Investors Canada                                       11,631
Chase Nominees Ltd                                                    105,540
Chase Nominees Ltd                                                     73,617
Clydesdale Nominees HGB0225                                             1,806
Investors Bank and Trust Co.                                        1,008,410
Investors Bank and Trust Co.                                          814,519
JP Morgan (BGI Custody)                                                57,538
JP Morgan (BGI Custody)                                               118,658
JP Morgan (BGI Custody)                                             1,707,292
JP Morgan (BGI Custody)                                               164,626
JP Morgan Chase Bank                                                   14,120
JP Morgan Chase Bank                                                    5,691
JP Morgan Chase Bank                                                  188,118
JP Morgan Chase Bank                                                   11,228
Mellon Trust - US Custodian /                                           6,386
Mitsui Asset                                                            2,605
R C Greig Nominees Limited GP1                                            375
State Street Boston                                                    83,426
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



4 October 2006


12. Total holding following this notification



12,681,119


13. Total percentage holding of issued class following this notification



5.94%


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



4 October 2006


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for loss of business or loss of profits) arising in contract, tort or otherwise
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