FactSet Research Systems Inc. will release its results for the first quarter of fiscal 2005 on Tuesday morning, December 21, 2004.

Investors will have the opportunity to listen to FactSet's senior management review first quarter results via webcast on Tuesday, December 21st at 11:00 a.m. eastern standard time. To hear the live event, please visit www.factset.com.

A replay of the webcast will be available approximately two hours after its conclusion on the investor relations section of FactSet's website, www.factset.com or by dialing 1.888.567.0421 (reservation number 2710438).

FactSet Research Systems Inc. is a leading provider of global financial and economic information, including fundamental data on tens of thousands of companies worldwide. Combining more than 200 databases into its own dedicated online service, the Company also provides the tools to download, combine and manipulate the data for investment analysis.

The Company, headquartered in Norwalk, Connecticut, was formed in 1978 and now conducts operations along with its affiliates from over twenty-two locations worldwide, including Boston, New York, Chicago, San Mateo, London, Frankfurt, Paris, Tokyo, Hong Kong, and Sydney.

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FactSet is a registered trademark of FactSet Research Systems Inc.