Post Holdings, Inc. — Director's Dealing 2025

Nov 14, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Post Holdings, Inc. (POST)
CIK: 0001530950
Period of Report: 2025-11-12

Reporting Person: MAINER MATTHEW J (EVP, CFO & TREASURER)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-12	Common Stock	M	6008	—	Acquired	52720	Direct
2025-11-12	Common Stock	F	2647	$106.02	Disposed	50073	Direct
2025-11-12	Common Stock	M	3916	—	Acquired	53989	Direct
2025-11-12	Common Stock	F	1725	$106.02	Disposed	52264	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-11-12	Restricted Stock Units	$	M	6008	Disposed		Common Stock (6008)	Direct
2025-11-12	Restricted Stock Units	$	M	3916	Disposed		Common Stock (3916)	Direct

Footnotes

F1: Surrender of shares in payment of tax withholding due as a result of the vesting of 6,008 restricted stock units ("RSUs") in accordance with Rule 16b-3.

F2: Surrender of shares in payment of tax withholding due as a result of the vesting of 3,916 RSUs in accordance with Rule 16b-3.

F3: 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.

F4: The RSUs vested on the first anniversary of the date of grant without any action on the part of the participant.

F5: 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.