Jeff A. Zadoks - 12 Nov 2025 Form 4 Insider Report for Post Holdings, Inc. (POST)

Role: EVP & COO
Signature: /s/ Diedre J. Gray, Attorney-in-Fact
Issuer symbol: POST
Transactions as of: 12 Nov 2025
Net transactions value: -$672,803
Form type: 4
Filing time: 14 Nov 2025, 16:40:39 UTC
Previous filing: 24 Oct 2025
Next filing: 18 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Zadoks Jeff A	EVP & COO	C/O POST HOLDINGS, INC., 2503 S. HANLEY ROAD, ST. LOUIS	/s/ Diedre J. Gray, Attorney-in-Fact	14 Nov 2025	0001343352

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	POST	Common Stock	Options Exercise	$0	+9,538	+21%	$0.000000	55,843	12 Nov 2025	Direct
transaction	POST	Common Stock	Tax liability	$445,496	-4,202	-7.5%	$106.02	51,641	12 Nov 2025	Direct	F1
transaction	POST	Common Stock	Options Exercise	$0	+4,865	+9.4%	$0.000000	56,506	12 Nov 2025	Direct
transaction	POST	Common Stock	Tax liability	$227,307	-2,144	-3.8%	$106.02	54,362	12 Nov 2025	Direct	F2
holding	POST	Common Stock						1,256	12 Nov 2025	By Family Trust
holding	POST	Common Stock						68,145	12 Nov 2025	By SLAT
holding	POST	Common Stock						122,740	12 Nov 2025	By Spouse

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	POST	Restricted Stock Units	Options Exercise	$0	-9,538	-100%	$0.000000	0	12 Nov 2025	Common Stock	9,538		Direct	F3, F4
transaction	POST	Restricted Stock Units	Options Exercise	$0	-4,865	-33%	$0.000000	9,731	12 Nov 2025	Common Stock	4,865		Direct	F3, F5

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

Explanation of Responses:

Id	Content
F1	Surrender of shares in payment of tax withholding due as a result of the vesting of 9,538 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 4,865 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.