STT State Street Corporation

State Street Corporation (State Street) today announced a quarterly dividend of $0.19 per share, payable April 17, 2006, to stockholders of record as of April 3, 2006. State Street's quarterly dividend rate is 12 percent higher than a year ago. State Street also announced that its Board of Directors has authorized a new 15 million share purchase authorization. This action replaces the previous authorization of 15 million shares approved in February 2005. Approximately 13.1 million shares were repurchased under this program. The new authorization will be used to offset the impact of employee benefit plans, as well as for other corporate purposes. State Street (NYSE: STT) is the world's leading specialist in providing institutional investors with investment servicing, investment management and investment research and trading services. With $10.1 trillion in assets under custody and $1.4 trillion in assets under management (as of December 31, 2005), State Street operates in 26 countries and more than 100 geographic markets worldwide and employs 20,965 worldwide. For more information, visit State Street's web site at www.statestreet.com or call 877/639-7788 (NEWS STT) toll-free in the United States and Canada, or +1 202/266-3340 outside those countries.