Packaging Corporation of America (NYSE:PKG) will hold a conference call on Thursday April 23, 2026 at 9:00 a.m. Eastern Time to discuss first quarter 2026 results. The conference call leader will be Mark Kowlzan. First quarter earnings results will be released after the market closes on Wednesday, April 22, 2026.

To access the conference call, you may pre-register for the conference by navigating to https://dpregister.com/sreg/10205353/102faf6c869. Once you have registered, you will receive your dial-in number. When dialing in the day of the call, please ask to join the Packaging Corporation of America earnings call.

If you prefer not to pre-register, you may dial in the day of the call using one of the following toll-free numbers: 833-816-1102 (U.S.), 866-605-3852 (Canada) or 412-317-0684 (International) by 8:45 a.m. (Eastern Time). Please ask to join the Packaging Corporation of America earnings call.

A replay of the call will also be available from April 23, 2026 until May 7, 2026. To access the recording, please use one of the following toll-free numbers: 855-669-9658 (U.S. and Canada) or (412) 317-0088 (International). The replay Access Code is: 6558573.

This call will also be webcast and accessible at PCA's website at www.packagingcorp.com. Please go to the Investor Relations tab to access the call.

PCA is the third largest producer of containerboard products and a leading producer of uncoated freesheet paper in North America. PCA operates ten paper mills and 91 corrugated products plants and related facilities.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260316226488/en/

Barbara Sessions

Packaging Corporation of America

INVESTOR RELATIONS: (877) 454-2509

PCA Web Site:

www.packagingcorp.com

Packaging Corporation of America Schedules Conference Call to Discuss First Quarter 2026 Operating Results