X0609 4 2026-07-02 0 0001530950 Post Holdings, Inc. POST 0001343352 Zadoks Jeff A false C/O POST HOLDINGS, INC. 2503 S. HANLEY ROAD ST. LOUIS MO 63144 1 0 0 0 0 Common Stock 2026-07-02 4 F 0 2544 90.94 D 35433 D Common Stock 2026-07-02 4 F 0 3867 90.94 D 31566 D Common Stock 2026-07-02 4 F 0 3551 90.94 D 28015 D Common Stock 686 I By Family Trust Common Stock 48145 I By SLAT Common Stock 122740 I By Spouse Surrender of shares in payment of additional tax withholding in accordance with Rule 16b-3 due as a result of the settlement of restricted stock units ("RSUs"), which were granted on November 14, 2023 under the Post Holdings, Inc. 2021 Long-Term Incentive Plan (the "Plan"), the vesting of which was accelerated in accordance with the terms of the Plan as a result of the Reporting Person's retirement as an officer of Post Holdings, Inc. (the "Company") on January 2, 2026 and the settlement of which was delayed for six months as required by Section 409A of the Internal Revenue Code (the "IRC"). The vesting and initial tax withholding related to these RSUs were previously disclosed on Reporting Person's Form 4 filed on January 6, 2026. Surrender of shares in payment of additional tax withholding in accordance with Rule 16b-3 due as a result of the settlement of RSUs, which were granted on November 12, 2024 under the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan (the "A&R Plan"), the vesting of which was accelerated in accordance with the terms of the A&R Plan as a result of the Reporting Person's retirement as an officer of the Company on January 2, 2026 and the settlement of which was delayed for six months as required by Section 409A of the IRC. The vesting and initial tax withholding related to these RSUs were previously disclosed on Reporting Person's Form 4 filed on January 6, 2026. Surrender of shares in payment of additional tax withholding in accordance with Rule 16b-3 due as a result of the settlement of RSUs, which were granted on November 18, 2025 under the A&R Plan, the vesting of which was accelerated in accordance with the terms of the A&R Plan as a result of the Reporting Person's retirement as an officer of the Company on January 2, 2026 and the settlement of which was delayed for six months as required by Section 409A of the IRC. The vesting and initial tax withholding related to these RSUs were previously disclosed on Reporting Person's Form 4 filed on January 6, 2026. /s/ Diedre J. Gray, Attorney-in-Fact 2026-07-07