New York, May 19, 2006 — The Nasdaq Stock Market, Inc. (“NASDAQ”) announces that it has acquired 2,219,250 shares in London Stock Exchange Group plc (“LSE”) for an average price of 1,235.5 pence per share. The consideration represents approximately GBP 27.4 million (c. US$ 51.1 million).

In addition to the 52,006,155 LSE Group plc shares owned following the share consolidation, this acquisition takes NASDAQ's holding in LSE to 54,225,405 shares or c. 25.1% of the issued share capital of LSE.

"We are pleased to have increased our strategic investment in LSE in excess of the important threshold of 25%", commented Bob Greifeld, President and Chief Executive Officer of NASDAQ.

Enquiries

NASDAQ Corporate Communications
Bethany Sherman
Tel: + 1 (212) 401 8714

Gavin Anderson & Company
Richard Constant
Tel: + 44 (0)20 7554 1403/1405

Greenhill & Co. International LLP (Financial adviser to NASDAQ)
Simon Borrows
Tel: + 44 (0)20 7440 0400

Dresdner Kleinwort Wasserstein Securities Limited (Broker to NASDAQ)
Angus Kerr
Tel: + 44 (0)20 7623 8000

Greenhill & Co. International LLP (“Greenhill & Co.”), which is regulated by the Financial Services Authority, is acting for NASDAQ in connection the transaction and for no one else and will not be responsible to anyone other than NASDAQ for providing the protections afforded to customers of Greenhill & Co. nor for providing advice in relation to the transaction.

Dresdner Kleinwort Wasserstein Securities Limited, which is authorized and regulated by the Financial Services Authority, is acting in the capacity of corporate broker for NASDAQ in connection the transaction and for no one else and will not be responsible to anyone other than NASDAQ for providing the protections afforded to customers of Dresdner Kleinwort Wasserstein Securities Limited nor for providing advice in relation to the transaction.

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