Company Headquarters

Packaging Corporation of America
1900 West Field Court
Lake Forest, IL 60045
Tel: (847) 482-3000

Stock Exchange

Symbol: PKG
New York Stock Exchange

Transfer Agent and Registrar

Computershare Trust Company N.A.
P.O. Box 43069
Providence, RI 02940-3069
Tel: (877) 282-1168 (Toll free)
       (816) 843-4299 (Outside North America)

Independent Auditors

Ernst & Young, LLP
Chicago, IL

Information Requests

Investor Relations
Packaging Corporation of America
1900 West Field Court
Lake Forest, IL 60045
Tel: (877) 454-2509