X0508 4 2025-11-14 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 2025-11-14 4 F 0 743 106.34 D 8714 D Common Stock 2025-11-15 4 F 0 299 106.70 D 8415 D Common Stock 2025-11-16 4 M 0 435 0 A 8850 D Common Stock 2025-11-16 4 F 0 192 106.70 D 8658 D Common Stock 1439.95 I By 401(k) Plan Restricted Stock Units 2025-11-16 4 M 0 435 0 D Common Stock 435 0 D Surrender of shares in payment of tax withholding due as a result of the vesting of 1,685 restricted stock units ("RSUs") in accordance with Rule 16b-3. Surrender of shares in payment of tax withholding due as a result of the vesting of 677 RSUs in accordance with Rule 16b-3. Surrender of shares in payment of tax withholding due as a result of the vesting of 435 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. 2021 Long-Term Incentive Plan, which was subsequently amended and restated, in a transaction exempt under Rule 16b-3. One-fourth of the RSUs vested on each of the first, second, third and fourth anniversaries on the date of grant without any action on the part of the participant. /s/ Diedre J. Gray, Attorney-in-Fact 2025-11-18