Holding(s) in Company

Clarkson PLC 01 December 2006 CLARKSON PLC HOLDING IN COMPANY The Company has been notified that on 30 November 2006 Barclays PLC had a notifiable interest in Clarkson PLC representing 6.69% of the ordinary issued share capital of the Company. The shares are held by five Barclay PLC group companies: Barclays Life Assurance Co Ltd 114,197 Barclays Global Investors Ltd 686,173 Gerrard Limited 9,900 Barclays Bank Trust Company Ltd 9,940 Barclays Capital Securities Ltd 396,346 1 December 2006 END Notes to editors Background to Clarkson PLC Clarkson PLC (which is listed on the London Stock Exchange) is acknowledged as the world's leading shipping services group. Through its unrivalled and extensive global network of offices it is able to give its clients unique access to a wide range of shipping services. Clarksons covers shipbroking, research, publications, derivatives and logistics. Clarksons' strategy is to expand and develop the group around these key activities. For further information on Clarkson PLC, please visit the company's website at www.clarksons.com This information is provided by RNS The company news service from the London Stock Exchange HOLFSLFEFSMSEDE

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Clarkson (CKN)
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