X0508 4 2025-12-01 0 0001530950 Post Holdings, Inc. POST 0001557413 GRAY DIEDRE J C/O POST HOLDINGS, INC. 2503 S. HANLEY ROAD ST. LOUIS MO 63144 0 1 0 0 EVP, GC & CAO, SECY 0 Common Stock 2025-12-01 5 J 0 E 40974 0 D 31886 D Common Stock 2025-12-01 5 J 0 E 40974 0 A 164903 I By Trust Common Stock 45839 I By Spouse's Trust The transfer of shares to the Reporting Person's revocable living trust resulted in a decrease in the number of shares the Reporting Person beneficially owns directly and a corresponding increase in the number of shares the Reporting Person beneficially owns indirectly through the trust. The Reporting Person believes that the transfer of shares to the trust constitutes a change in form of beneficial ownership of the shares, exempted by Rule 16a-13 under the Securities Exchange Act of 1934, as amended. /s/ Diedre J. Gray 2025-12-02