X0508 4 2025-11-12 0 0001530950 Post Holdings, Inc. POST 0001759632 HARPER BRADLY A C/O POST HOLDINGS, INC. 2503 S. HANLEY ROAD ST. LOUIS MO 63144 0 1 0 0 SVP, CHIEF ACCTING OFFICER 0 Common Stock 2025-11-12 4 M 0 1280 0 A 10021 D Common Stock 2025-11-12 4 F 0 564 106.02 D 9457 D Common Stock 1439.95 I By 401(k) Plan Restricted Stock Units 2025-11-12 4 M 0 1280 0 D Common Stock 1280 2561 D Surrender of shares in payment of tax withholding due as a result of the vesting of 1,280 restricted stock units ("RSUs") in accordance with Rule 16b-3. Each RSU represents a contingent right to receive one share of Post Holdings, Inc. common stock. The RSUs were granted under the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan in a transaction exempt under Rule 16b-3. One-third of the RSUs vest on each of the first, second and third anniversaries of the date of grant without any action on the part of the participant, subject to the terms of the applicable award agreement. /s/ Diedre J. Gray, Attorney-in-Fact 2025-11-14