STT State Street Corporation

Indexes track financial performance of sustainability-driven companies State Street Corporation (NYSE: STT), the world's leading provider of financial services to institutional investors, announced today that it has qualified for both the World and North America Dow Jones Sustainability Indexes (DJSI). Launched in 1999, the DJSI track the financial performance of the leading sustainability-driven companies worldwide and provide asset managers with reliable, objective benchmarks to manage sustainability portfolios. Its results influence the investment decisions of asset managers in 14 countries who have licensed the DJSI family as benchmarks for a variety of sustainability-driven portfolios. The annual review of the DJSI is based on an assessment of corporate economic, environmental and social performance. State Street's enhanced environmental management and corporate governance policies, in addition to its strong citizenship and philanthropy programs, were among the reasons for its inclusion on the DJSI indexes. "We're pleased to be listed on two of the Dow Jones Sustainability Indexes," said Ronald E. Logue, chairman and chief executive officer of State Street. "Experts agree that sustainability is a key attribute to a company's overall success and we are proud to be recognized for our excellence across a broad range of factors." State Street Corporation (NYSE: STT) is the world's leading specialist in providing institutional investors with investment servicing, investment management and investment research and trading services. With $10.9 trillion in assets under custody and $1.5 trillion in assets under management as of 30 June 2006, State Street operates in 26 countries and more than 100 geographic markets worldwide. For more information, visit State Street's web site at www.statestreet.com. More information on the DJSI, including State Street's sustainability report, can be found at www.sustainability-indexes.com/.