STATE STREET APPOINTS STUART PLATT-RANSOM AS GUERNSEY MANAGING DIRECTOR

Guernsey – 27 April 2006 -- State Street Corporation (NYSE: STT), the world's leading provider of financial services to institutional investors, today announced the appointment of Stuart Platt-Ransom to managing director of its operations in Guernsey. State Street has had a presence in Guernsey since 2000 and provides trustee and global investment services, including custody, from its new office in St. Peter Port.

Platt-Ransom has been with State Street for 11 years and has spent time in State Street’s South Africa, Luxembourg, Ireland and UK offices in various operational, business development and relationship management roles. Most recently, he served as general manager of State Street’s business in South Africa and its alliance with Nedbank, overseeing the rapid growth of State Street’s business in the region and the formation of State Street Southern Africa (Pty) Ltd to facilitate further expansion. Prior to joining State Street, Platt-Ransom worked for Global Asset Management in the Isle of Man.

Platt-Ransom will report to Donald Anderson, managing director of State Street’s trustee business in the UK.

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