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U.S. COMPANY FILING

PACKAGING CORP OF AMERICA — Form 8-K filed 2026-04-23

Filed: 2026-04-23Company: PACKAGING CORP OF AMERICATicker: PKGExchange: NYSEForm: 8-KReport period: 2026-04-22SEC accession: 0001193125-26-171009Event: earningsMateriality: 70

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Packaging Corporation of America issued a press release on April 22, 2026, announcing first quarter financial results. The release is furnished as Exhibit 99.1 and incorporated into Item 2.02 of the 8-K. The company is headquartered in Lake Forest, Illinois, and trades on the NYSE under PKG.

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