Holding(s) in Company

Clarkson PLC 21 December 2006 CLARKSON PLC HOLDING IN COMPANY The Company has been notified that on 15 December 2006 Barclays Bank PLC had a notifiable interest in Clarkson PLC representing 5.42% of the ordinary issued share capital of the Company. The shares are held by five Barclays PLC group companies: Barclays Life Assurance Co Ltd 114,197 Barclays Capital Securities Ltd 177,765 Barclays Global Investors Ltd 670,408 Barclays Bank Trust Company Ltd 9,940 Gerrard Ltd 12,462 21 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

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Clarkson (CKN)
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