Holding(s) in Company

London Stock Exchange Group PLC
15 May 2007

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES


     
1.   Identity of the issuer or the underlying issuer of existing shares to which
     voting rights are attached (ii):

     London Stock Exchange Group plc


2.   Reason for the notification (please state Yes/No):

     An acquisition or disposal of voting rights: (Y)

     An acquisition or disposal of financial instruments which may result in the
     acquisition of shares already issued to which voting rights are attached: 
     (N)

     An event changing the breakdown of voting rights: (N)

     Other (please specify): (N/A)


3.   Full name of person(s) subject to the notification obligation (iii):

     Credit Suisse Securities (Europe) Limited


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

     Credit Suisse Securities (Europe) Limited
     Credit Suisse International

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

     10 May 2007


6.   Date on which issuer notified:

     14 May 2007


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

     4%


8.   Notified details:

A: Voting rights attached to shares


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

                                   10,321,892                         10,321,892


Resulting situation after the triggering transaction (vii)


Class/type of shares if       Number of shares         Number of voting rights (ix)      % of voting rights
possible using the ISIN CODE
                              Direct                   Direct (x)   Indirect (xi)        Direct      Indirect

                              7,881,693                7,881,693    N/A                  3.81%       N/A

B:   Financial Instruments

     Resulting situation after the triggering transaction (xii)


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


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

7,881,693                        3.81%

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

     Credit Suisse Securities (Europe) Limited is a part of the Investment 
     Banking division of Credit Suisse ('CSIBD'), which is part of the Credit 
     Suisse Group ('CSG').  CSIBD is a segregated business unit within CSG with 
     an independent management structure and exercises its voting rights 
     independently from other divisions of CSG.

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:

     N/A


14.  Name of contact and telephone number for queries

     Lisa Condron, 020 7797 3517


15.  Name and signature of duly authorised officer of the listed company
     responsible for making this notification

     Lisa Condron, Company Secretary


16.  Date of notification

     15 May 2007


Notes to the Forms
     
(i)  This form is to be sent to the issuer or underlying issuer and to be filed
     with the competent authority.

(ii) Either the full name of the legal entity or another method for identifying
     the issuer or underlying issuer, provided it is reliable and accurate.

(iii)This should be the full name of (a) the shareholder; (b) the person
     acquiring, disposing of or exercising voting rights in the cases provided 
     for in DTR5.2.1 (b) to (h); (c) all the parties to the agreement referred 
     to in DTR5.2.1 (a), or (d) the direct or indirect holder of financial 
     instruments entitled to acquire shares already issued to which voting 
     rights are attached, as appropriate.

In relation to the transactions referred to in points DTR5.2.1 (b) to (h), the
following list is provided as indication of the persons who should be mentioned:
     
-    in the circumstances foreseen in  DTR5.2.1 (b), the person that acquires 
     the voting rights and is entitled to exercise them under the agreement and 
     the natural person or legal entity who is transferring temporarily for 
     consideration the voting rights;

-    in the circumstances foreseen in DTR 5.2.1 (c), the person holding the
     collateral, provided the person or entity controls the voting rights and
     declares its intention of exercising them, and person lodging the 
     collateral under these conditions;

-    in the circumstances foreseen in DTR5.2.1(d), the person who has a life
     interest in shares if that person is entitled to exercise the voting rights
     attached to the shares and the person who is disposing of the voting rights 
     when the life interest is created;

-    in the circumstances foreseen in DTR5.2.1 (e), the parent undertaking and,
     provided it has a notification duty at an individual level under DTR 5.1, 
     under DTR5.2.1 (a) to (d) or under a combination of any of those 
     situations, the controlled undertaking;

-    in the circumstances foreseen in DTR5.2.1 (f), the deposit taker of the
     shares, if he can exercise the voting rights attached to the shares 
     deposited with him at his discretion, and the depositor of the shares 
     allowing the deposit taker to exercise the voting rights at his discretion;

-    in the circumstances foreseen in DTR5.2.1 (g), the person  that controls 
     the voting rights;

-    in the circumstances foreseen in DTR5.2.1 (h), the proxy holder, if he can
     exercise the voting rights at his discretion, and the shareholder who has 
     given his proxy to the proxy holder allowing the latter to exercise the 
     voting rights at his discretion.
     
(iv) Applicable in the cases provided for in DTR 5.2.1 (b) to (h). This should
     be the full name of the shareholder who is the counterparty to the natural
     person or legal entity referred to in DTR5.2.

(v)  The date of the transaction should normally be, in the case of an on
     exchange transaction, the date on which the matching of orders occurs; in 
     the case of an off exchange transaction, date of the entering into an 
     agreement.

     The date on which threshold is crossed should normally be the date on which 
     the acquisition, disposal or possibility to exercise voting rights takes 
     effect (see DTR 5.1.1R (3)). For passive crossings, the date when the 
     corporate event took effect.

(vi) Please refer to the situation disclosed in the previous notification. In
     case the situation previous to the triggering transaction was below 3%, 
     please state 'below 3%'.

(vii)If the holding has fallen below the minimum threshold, the notifying
     party should not be obliged to disclose the extent of the holding, only 
     that the new holding is less than 3%.

     For the case provided for in DTR5.2.1(a), there should be no disclosure of
     individual holdings per party to the agreement unless a party individually
     crosses or reaches an Article 9 threshold. This applies upon entering into,
     introducing changes to or terminating an agreement.

(viii)Direct and indirect

(ix) In case of combined holdings of shares with voting rights attached 'direct
     holding' and voting rights 'indirect holdings', please split the voting 
     rights number and percentage into the direct and indirect columns-if there 
     is no combined holdings, please leave the relevant box blank.

(x)  Voting rights to shares in respect of which the notifying party is a direct
     shareholder  (DTR 5.1)

(xi) Voting rights held by the notifying party as an indirect shareholder (DTR
     5.2.1)

(xii)If the holding has fallen below the minimum threshold, the notifying
     party should not be obliged to disclose the extent of the holding, only 
     that the new holding is below 3%.

(xiii)date of maturity / expiration of the finical instrument i.e. the date
     when the right to acquire shares ends.

(xiv)If the financial instrument has such a period-please specify the period-
     for example once every three months starting from the (date)

(xv) The notification should include the name(s) of the controlled undertakings
     through which the voting rights are held. The notification should also 
     include the amount of voting rights and the percentage held by each 
     controlled undertaking, insofar as individually the controlled undertaking 
     holds 5% or more, and insofar as the notification by the parent undertaking 
     is intended to cover the notification obligations of the controlled 
     undertaking.

(xvi )This annex is only to be filed with the competent authority.

(xvii)Whenever another person makes the notification on behalf of the
     shareholder or the natural person/legal entity referred to in DTR5.2 and 
     DTR5.3


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