STT State Street Corporation

State Street Global Advisors (SSgA), the investment management arm of State Street Corporation (NYSE: STT), announced today that it has been once again ranked No. 1 by Pensions & Investments� 2007 Money Managers Survey of leading institutional asset managers. This marks the seventh consecutive year that SSgA has topped P&I�s survey. SSgA is the top investment management firm based on total worldwide institutional assets of $1.8 trillion. The record amount of assets under management represents a 10 percent gain from a year earlier, highlighting SSgA�s significant new business growth around the world during 2007. SSgA�s total worldwide assets under management in 2007 was $2 trillion1. Net new business for SSgA in 2007 was $116 billion with assets flowing into both beta and alpha strategies. Assets in active international equities from U.S. clients increased by 34 percent over the previous year; active emerging market equity assets were up 50 percent. State Street Global Advisors also continues to be a leader in 130/30 strategies with assets in SSgA�s Edge (130/30) strategies tripling from $4 billion in year-end 2006 to $12.8 billion in year-end 2007. International indexed assets rose 12 percent, and international fixed income assets increased 37 percent. SSgA also extended its leadership in exchange-traded funds, introducing 22 new products. The group�s ETF assets under management soared 52 percent in 2007 to $171 billion worldwide. �We are honored to again be recognized by Pensions & Investments as the world�s largest institutional asset manager,� said Scott Powers, president and chief executive officer of State Street Global Advisors. �The fact that SSgA has maintained its No. 1 ranking for seven consecutive years reflects our ability to deliver a wide range of investment solutions, bolstered by a constant flow of product innovation, that help us meet our clients� evolving needs.� About State Street Global Advisors State Street Global Advisors, the investment management arm of State Street Corporation (NYSE: STT), delivers investment strategies and integrated solutions to clients worldwide across every asset class, investment approach and style. With $2 trillion in assets under management at March 31, 2008, State Street Global Advisors has investment centers in Boston, Hong Kong, London, Montreal, Munich, Paris, Singapore, Sydney, Toronto, Tokyo and Zurich, and offices in 27 cities worldwide. For more information, visit State Street Global Advisors at www.ssga.com. 1 $1,978,984