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OM Group Announcement Of Acceptance Levels Offer For London Stock Exchange Plc ('LSE')

Date 16/10/2000

By 3.00 p.m. on 13 October 2000, the date of OM's announcement of its Increased Offer, valid acceptances of the Offer posted on 11 September 2000 had been received in respect of a total of 300,000 LSE Shares, representing approximately 1.0 per cent. of the issued ordinary share capital of LSE.

As at 13 October 2000, Lazard and Enskilda Securities or companies within their respective groups deemed to be acting in concert with OM owned or controlled 200,000 and 90,000 LSE Shares respectively, representing approximately 0.67 per cent. and 0.30 per cent. respectively of the issued ordinary share capital of LSE.

Prior to the commencement of the offer period, Enskilda Securities or companies within its group deemed to be acting in concert with OM owned or controlled 100,000 LSE Shares, representing approximately 0.33 per cent. Of the issued ordinary share capital of LSE.

Save as disclosed above, neither OM nor any person deemed to be acting in concert with OM held any LSE Shares immediately prior to the commencement of the offer period. Neither OM nor any person deemed to be acting in concert with OM has acquired or agreed to acquire any LSE Shares since the commencement of the offer period and no acceptances have been received from any person acting in concert with OM.

Terms defined in the Increased Offer Document have the same meanings when used herein unless the context requires otherwise.

LSE Shareholders who have not yet accepted the Increased Offer and who wish to do so should despatch their Forms of Acceptance as soon as possible and, in any event, so as to be received not later than 3.00 p.m. on 27 October 2000.