Jeff A. Zadoks - 15 Mar 2026 Form 3 Insider Report for Post Holdings, Inc. (POST)

Role: Director
Signature: /s/ Diedre J. Gray, Attorney-in-Fact
Issuer symbol: POST
Transactions as of: 15 Mar 2026
Net transactions value: $0
Form type: 3
Filing time: 16 Mar 2026, 17:09:47 UTC
Previous filing: 06 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Zadoks Jeff A	Director	C/O POST HOLDINGS, INC., 2503 S. HANLEY ROAD, ST. LOUIS	/s/ Diedre J. Gray, Attorney-in-Fact	16 Mar 2026	0001343352

Transactions Table

Type	Sym	Class	Shares After	Date	Ownership	Footnotes
holding	POST	Common Stock	36,277	15 Mar 2026	Direct	F1
holding	POST	Common Stock	686	15 Mar 2026	By Family Trust
holding	POST	Common Stock	48,145	15 Mar 2026	By SLAT
holding	POST	Common Stock	122,740	15 Mar 2026	By Spouse

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This balance includes 23,888 restricted stock units ("RSUs"), (i) which were previously granted to Reporting Person in connection with his prior roles as an employee of Post Holdings, Inc. (the "Issuer") under either the Post Holdings, Inc. 2021 Long-Term Incentive Plan or the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan and (ii) the vesting of which accelerated according to the terms of the award agreements underlying the RSUs in conjunction with his retirement as an employee of the Issuer on January 2, 2026 (the "Retirement Date"). Each RSU represents a right to receive one share of the Issuer's common stock. The settlement of these RSUs, reduced for the withholding of certain taxes due at that time, will occur following a six-month delay after the Retirement Date, as required under Section 409A of the Internal Revenue Code.

Content

This balance includes 23,888 restricted stock units ("RSUs"), (i) which were previously granted to Reporting Person in connection with his prior roles as an employee of Post Holdings, Inc. (the "Issuer") under either the Post Holdings, Inc. 2021 Long-Term Incentive Plan or the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan and (ii) the vesting of which accelerated according to the terms of the award agreements underlying the RSUs in conjunction with his retirement as an employee of the Issuer on January 2, 2026 (the "Retirement Date"). Each RSU represents a right to receive one share of the Issuer's common stock. The settlement of these RSUs, reduced for the withholding of certain taxes due at that time, will occur following a six-month delay after the Retirement Date, as required under Section 409A of the Internal Revenue Code.

Remarks:

See attached Exhibit 24 - Power of Attorney.