OTTAWA, ON and BURLINGTON, MA, January 13, 2003—Cognos (Nasdaq: COGN; TSX: CSN), the world leader in business intelligence (BI), today announced it has completed the acquisition of privately-held Adaytum, the global leader in enterprise performance planning (EPP).

"We're delighted to complement our market-leading business intelligence with Adaytum's best-in-class enterprise performance planning," said Ron Zambonini, Cognos CEO. "The addition of Adaytum gives us a world-class, enterprise-scale solution that puts us on the leading edge of the corporate performance management (CPM) marketplace."

Adaytum offers planning and performance management solutions for business and public sector organizations, with more than 1,500 customers worldwide. Founded in the United Kingdom in 1990, Adaytum was incorporated in the US with headquarters in Minneapolis and offices in the UK, the Netherlands and Australia. It is also represented in more than 35 other countries through a network of strategic alliance partners and value-added resellers.

Conference Call Details
Cognos will review details of the acquisition close on a conference call at 5:15 p.m. Eastern Time today, January 13, 2003. The conference call may be accessed at 416-640-1907. The webcast may be accessed at http://www.cognos.com/company/investor/events/jan13.

A replay of the conference call will be available from Monday, January 13, 2003 at 8:00 p.m. Eastern Time until Monday, January 20, 2003 at 11:59 p.m. Eastern Time. The replay can be accessed at 416-640-1917. The passcode for the replay is 232487#.

Certain statements made in this press release that are not based on historical information are forward-looking statements which are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995.

This press release contains forward-looking statements relating to the future benefits to be derived from this acquisition, including among other things, the Company's ability to offer an integrated CPM offering; the Company's ability to accelerate the execution of its CPM strategy; the Company's expectations concerning revenue, anticipated market share, leadership position in the CPM market and business outlook and momentum in the CPM market.

These forward-looking statements are neither promises nor guaranteed, but involve risks and uncertainties that may cause actual results to differ materially from those in the forward-looking statements. Factors that may cause such differences include, but are not limited to the Company's ability to identify selective acquisition candidates of other products or businesses that are believed to be complementary to those of the Company; the successful integration of the acquired product or business into the Company's operations; failure to achieve anticipated synergies; the ability to retain key acquired personnel; development of new technologies and the commercialization of those technologies in a highly competitive marketplace which is subject to rapid technological change; loss of rights to, or unauthorized use by others of, the intellectual property; unanticipated liabilities, expenses, events or circumstances; and the ability to appropriately value the acquired in-process research and development; as well as the risk factors discussed in the Company's most recent Annual Report on Form 10-K filed with the United States Securities and Exchange Commission. Readers should not place undue reliance on any such forward-looking statements, which speak only as of the date they are made. The Company disclaims any obligation to publicly update or revise any such statement to reflect any change in its expectations or in events, conditions, or circumstances on which any such statements may be based, or that may affect the likelihood that actual results will differ from those contained in the forward-looking statements.