OTTAWA, ON AND BURLINGTON, MA, September 10, 2003—Cognos (Nasdaq: COGN; TSX: CSN), the world leader in business intelligence (BI) and corporate performance management, today announced that it will release second quarter fiscal 2004 financial results on September 24, 2003 after the close of the market. The company will discuss the results on a conference call and Webcast, beginning at 5:15 p.m. Eastern Time.

Listeners can access the conference call at 416-640-1907 or via Webcast at http://www.cognos.com/earnings. Presentation slides for the call can be accessed at the Investor Relations area of the Cognos Web site approximately 15 minutes prior to the start of the call.

A replay of the conference call will be available from Wednesday, September 24, 2003 at 8:45 p.m. Eastern Time until Wednesday, October 8, 2003 at 11:59 p.m. Eastern Time. The replay can be accessed at 416-640-1917. The passcode for the replay is 21015992#.