STT State Street Corporation

State Street Corporation (NYSE:STT), the world's leading provider of services to institutional investors, announced today that it has been retained by Halliburton to provide a wide range of investment services including fund accounting, custody, foreign exchange and performance and analytics for Halliburton's multinational pension plan comprising approximately $6 billion in assets. State Street has been providing investment management and investment servicing solutions to Halliburton since 1989. "Consistency and innovation have been hallmarks of the service that State Street has provided since the beginning of our relationship sixteen years ago," said Nat Duffield, director of trust investments for Halliburton. "Their commitment to being at the leading edge of solutions for institutional investors continues to set them apart from other providers." State Street is the leading provider of investment management and investment servicing solutions to public and private pension plans in the United States. Major multinational corporations such as Halliburton benefit from State Street's deep experience and expertise in managing and servicing consolidated Defined Benefit and Defined Contribution assets, and delivering flexible and cost effective solutions. "We measure our success by the depth and length of relationships that we enjoy with our clients," said Robert Tarter, executive vice president and head of State Street's institutional investment servicing business in the United States. "As such, we are delighted to renew our relationship with Halliburton, and we look forward to marking another decade of excellence with them." About State Street 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. With $9.6 trillion in assets under custody and $1.4 trillion in assets under management (as of June 30, 2005), State Street operates in 25 countries and more than 100 geographic markets worldwide. For more information, visit State Street's web site at www.statestreet.com. About Halliburton Halliburton, founded in 1919, is one of the world's largest providers of products and services to the petroleum and energy industries. The company serves its customers with a broad range of products and services through its Energy Services Group and KBR. The company's World Wide Web site can be accessed at www.halliburton.com.