ACI stock trades on the Nasdaq National Market.

Effective the quarter ended December 31, 2007 we moved to a calendar fiscal year end.

Contact our transfer agent:

Wells Fargo Shareowners Services
161 North Concord Exchange
South St. Paul, Minnesota 55075
1-800-468-9716

ACI does not currently issue dividends or have a Dividend Reinvestment Plan, choosing instead to reinvest in the company's business.

Wells Fargo Shareowners Services is ACI's transfer agent. General correspondence such as address changes, name changes, notification of lost certificates, transfers, etc. should be mailed to:

Wells Fargo Shareowners Services
Post Office Box 64854
St. Paul, Minnesota 55164-08540

#004498 101

For details regarding assumptions please see the overview of backlog calculations.

Please contact our Investor Relations department at invrel@aciworldwide.com.