144 0001776032 XXXXXXXX LIVE 0000075677 Packaging Corp of America 001-15399 1 North Field Court Lake Forest IL 60045 847-482-4545 Donald Ray Shirley Director Common Merrill Lynch 13310 N California Blvd Ste 400 Walnut Creek CA 94596 12000 3000000 89098299 08/20/2026 NYSE Common 02/25/2024 Stock bonus Packaging Corp of America N 1177 02/25/2024 Stock bonus Common 02/23/2025 Stock bonus Packaging Corp of America N 1844 02/23/2025 Stock bonus Common 03/11/2025 Stock bonus Packaging Corp of America N 2142 03/11/2025 Stock bonus Common 04/10/2025 Stock bonus Packaging Copr of America N 3571 04/10/2025 Stock bonus Common 02/23/2026 Stock bonus Packaging Corp of America N 1983 02/23/2026 Stock bonus Common 02/23/2026 Stock bonus Packaging Corp of America N 1284 02/23/2026 Stock bonus Y 08/20/2026 Donald Ray Shirley