 LAKE FOREST, Ill--BUSINESS WIRE--Packaging Corporation of America NYSE: PKG will hold a conference call on Tuesday, October 26, 2021 at 9:00 a.m. Eastern Time to discuss third quarter 2021 results. Third quarter earnings results will be released after the market closes on Monday, October 25, 2021. To access the conference call, please dial 855 730-0288 U.S. and Canada or 832 412-2295 International by 8:45 a.m. Eastern Time. The conference call leader will be Mark Kowlzan, and the 