tyle="font-family:Times New Roman;font-weight:bold;text-align:center;font-size:12pt;margin-bottom:0pt;margin-top:0pt">of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): May 5, 2020

 

Packaging Corporation of America

(Exact name of registrant as specified in its charter)

 

Delaware

 

1-15399

 

36-4277050

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