Packaging Corporation of America (NYSE:PKG) will hold a conference call on Thursday October 22, 2026 at 9:00 a.m. Eastern Time to discuss third quarter 2026 results. The conference call leader will be Mark Kowlzan. Third quarter earnings results will be released after the market closes on Wednesday, October 21, 2026.

To access the conference call, you may pre-register for the conference by navigating to https://dpregister.com/sreg/10205357/102fc34e0c7. 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 October 22, 2026 until November 5, 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: 8981933

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 10 paper mills and 90 corrugated products plants and related facilities.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260917902610/en/

Barbara Sessions

Packaging Corporation of America

INVESTOR RELATIONS: (877) 454-2509

PCA Web Site: www.packagingcorp.com