144 0001343352 XXXXXXXX LIVE 0001530950 Post Holdings, Inc 001-35305 2503 S. Hanley St Louis MO 63144 314-644-7662 Sandra Zadoks Spouse of Officer Common Merrill

7676 Forsyth Blvd 25th Floor Clayton MO 63105

50000 5695377 47956718 02/09/2026 NYSE Common 12/09/2024 Equity Award Jeff Zadoks N 30292 10/21/2024 Compensation Common 12/01/2025 Equity Award Jeff Zadoks N 27257 10/22/2025 Compensation Common 12/01/2025 Equity Award Jeff Zadoks N 3494 11/15/2025 Compensation Y Jeff Zadoks is a retired officer of Post Holdings, Inc. Shares were transferred for estate planning from Jeff to his spouse, Sandra Zadoks. Sandra is selling the shares. 02/09/2026 Sandra Zadoks