Cognos Chief Strategy Officer to Speak at Citigroup 12th Annual Global Technology Conference September 7

Ottawa, Ontario and Burlington, Massachusetts, September 2, 2005 - Cognos (Nasdaq: COGN; TSX: CSN), the world leader in business intelligence and corporate performance management (CPM), today announced that Chief Strategy Officer Rob Rose will speak at the upcoming Citigroup 12th Annual Global Technology Conference on September 7 at the Sheraton New York Hotel in New York, NY.

During the session, Mr. Rose will review the current market landscape, the impact Cognos is having on its core areas of focus, including enterprise business intelligence, enterprise planning and enterprise scorecarding, and the ever-increasing role and importance of Corporate Performance Management in delivering the next level of performance. Mr. Rose will also discuss the growth of Cognos—both in its expansion globally and in its continually expanding customer base.

The presentation will begin at 2:55 p.m. Eastern Time. Listeners can access the presentation via webcast at http://www.cognos.com/company/investor/events. A replay of the webcast will be archived in the Investor Relations area of the Cognos web site following the presentation.

About Cognos:

Cognos delivers the next level of competitive advantage - Corporate Performance Management (CPM) - achieved through the strategic application of BI on an enterprise scale. Our integrated CPM solution helps customers drive performance through planning; monitor performance through scorecarding; and understand performance through business intelligence.

Cognos serves more than 23,000 customers in over 135 countries. Cognos enterprise business intelligence and performance management solutions and services are also available from more than 3,000 worldwide partners and resellers. For more information, visit the Cognos Web site at http://www.cognos.com.