Holding(s) in Company

London Stock Exchange Group PLC
22 May 2006

London Stock Exchange Group plc

22 May 2006

London Stock Exchange Group plc received the following letter on 22 May 2006
from Nightingale Acquisition Limited a subsidiary of The Nasdaq Stock Market,
Inc.

We hereby notify you in accordance with Part VI of the Companies Act 1985 (the '
Act') that, following the acquisition (the 'Acquisition') of 2,219,250 ordinary
shares of 6 79/86 pence each in the London Stock Exchange Group plc (the 'LSEG
plc'):

(a)          as at 19 May 2006, Nightingale Acquisition Limited ('NAL') was
interested for the purposes of the Act in 54,225,405 ordinary shares of 6 79/86
pence each in the relevant share capital, as defined in section 198(2) of the
Act, of the LSEG plc ('Relevant Shares') representing approximately 25.1% of the
issued share capital of the LSEG plc.  Prior to the Acquisition, NAL was
interested in 52,006,155 Relevant Shares representing approximately 24.1% in
aggregate of the issued share capital of the LSEG plc;

(b)          we are or will be (once registration in the register of members of
the LSEG plc has taken place) the registered holder of the Relevant Shares; and

(c)          none of the Relevant Shares are shares in which we are interested
by virtue of section 208(5) of the Act.

London Stock Exchange Group plc, name of contact and telephone number for
queries

Lisa Condron, Company Secretary Tel: [phone]

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

Lisa Condron, Company Secretary



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