[Form 4] Post Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Post Holdings (POST) disclosed insider equity activity by its President & CEO on 11/12/2025. The reporting person converted restricted stock units into common stock, with 23,227 shares and 14,582 shares acquired at $0 per share (code M). To cover taxes from these RSU vestings, the reporting person surrendered 10,232 shares and 6,424 shares at $106.02 (code F).

Following the transactions, directly owned common stock was 935,834 shares. Indirect holdings were 6,870 shares by a 1994 Trust, 114,400 shares by a 2020 Family Trust (Robert Vitale), and 104,850 shares by a 2020 Family Trust (Spouse).

Insights

Corporate governance analyst

Routine RSU vesting with tax withholdings; minimal impact.

The transactions reflect standard equity compensation mechanics. RSUs vested and converted to common stock in two tranches of 23,227 and 14,582 shares at $0, consistent with plan terms under Rule 16b-3.

Shares were withheld to satisfy taxes via dispositions of 10,232 and 6,424 shares at $106.02. Post-transaction direct ownership is 935,834 shares, with additional indirect trust holdings. These are administrative movements rather than open-market buys or sells.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

VITALE ROBERT V

(Last) (First) (Middle)

C/O POST HOLDINGS, INC.

2503 S. HANLEY ROAD

(Street)

ST. LOUIS MO 63144

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Post Holdings, Inc. [ POST ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	PRESIDENT & CEO

3. Date of Earliest Transaction (Month/Day/Year)
11/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/12/2025		M		23,227	A	$0	937,908	D
Common Stock	11/12/2025		F		10,232(1)	D	$106.02	927,676	D
Common Stock	11/12/2025		M		14,582	A	$0	942,258	D
Common Stock	11/12/2025		F		6,424(2)	D	$106.02	935,834	D
Common Stock								6,870	I	By 1994 Trust
Common Stock								114,400	I	By 2020 Family Trust (Robert Vitale)
Common Stock								104,850	I	By 2020 Family Trust (Spouse)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(3)	11/12/2025		M			23,227	(4)	(4)	Common Stock	23,227	$0	0	D
Restricted Stock Units	(3)	11/12/2025		M			14,582	(5)	(5)	Common Stock	14,582	$0	29,165	D

Explanation of Responses:

1. Surrender of shares in payment of tax withholding due as a result of the vesting of 23,227 restricted stock units ("RSUs") in accordance with Rule 16b-3.

2. Surrender of shares in payment of tax withholding due as a result of the vesting of 14,582 RSUs in accordance with Rule 16b-3.

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. Amended and Restated 2021 Long-Term Incentive Plan in a transaction exempt under Rule 16b-3.

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

5. 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.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	11/14/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did POST’s CEO report on Form 4?

Two RSU conversions into common stock of 23,227 and 14,582 shares (code M) on 11/12/2025, with related tax-withholding share surrenders (code F).

How many shares were surrendered for taxes in the POST Form 4?

The reporting person surrendered 10,232 shares and 6,424 shares at $106.02 per share to cover tax withholding.

What is the reporting person’s POST direct ownership after the transactions?

Directly owned common stock totaled 935,834 shares after the reported transactions.

Were these open-market transactions for POST stock?

No. The acquisitions were RSU conversions at $0 (code M), and the dispositions were tax withholdings (code F), not open-market trades.

What indirect POST holdings were disclosed?

Indirect holdings include 6,870 shares by a 1994 Trust, 114,400 shares by a 2020 Family Trust (Robert Vitale), and 104,850 shares by a 2020 Family Trust (Spouse).

What plan governed the RSUs in the POST filing?

The RSUs were granted under the Post Holdings, Inc. Amended and Restated 2021 Long‑Term Incentive Plan and are exempt under Rule 16b‑3.