X0306 4 2012-10-22 0 0000075677 PACKAGING CORP OF AMERICA PKG 0001239789 STECKO PAUL T 1955 WEST FIELD COURT LAKE FOREST IL 60045 1 1 0 0 Exec Chairman Common Stock 2012-10-22 4 M 0 37500 20.96 A 149367 D Common Stock 2012-10-22 4 S 0 37500 35.9685 D 111867 D Common Stock 133983 I By Trust Common Stock 7970 I By 401(k) plan Option (right to buy) 20.96 2012-10-22 4 M 0 37500 0.00 D 2013-06-20 Common Stock 37500 0 D The price listed is the weighted average sale price. The actual sales prices for these shares ranged between $35.69 and $36.125. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request. By grantor retained annuity trusts of which reporting person is trustee and annuitant and reporting person's children are remaindermen. Reporting person disclaims beneficial ownership except to the extent of his pecuniary interest therein. This option was fully vested. Kent A. Pflederer, attorney in fact 2012-10-23