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

Rhea-AI Filing Summary

Post Holdings, Inc. (POST) executive vice president, chief financial officer and treasurer reported routine equity award-related transactions on Form 4. On 11/14/2025, the officer surrendered 1,249 shares of common stock at $106.34 per share to cover tax withholding due on the vesting of 2,834 restricted stock units (RSUs). On 11/15/2025, the officer surrendered an additional 937 shares at $106.70 per share for tax withholding on the vesting of 2,127 RSUs. After these transactions, the officer directly owned 50,078 shares of Post Holdings common stock.

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

OMB Number:			3235-0287
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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^*

MAINER MATTHEW J

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, CFO & TREASURER

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

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	11/14/2025		F		1,249(1)	D	$106.34	51,015	D
Common Stock	11/15/2025		F		937(2)	D	$106.7	50,078	D

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

Explanation of Responses:

1. Surrender of shares in payment of tax withholding due as a result of the vesting of 2,834 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 2,127 RSUs in accordance with Rule 16b-3.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	11/18/2025
	** 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 insider transaction did Post Holdings (POST) report in this Form 4?

The filing reports that a Post Holdings EVP, CFO & Treasurer surrendered shares of common stock to pay tax withholding arising from vested restricted stock units (RSUs).

How many Post Holdings (POST) shares were surrendered for taxes on 11/14/2025?

On 11/14/2025, the officer surrendered 1,249 shares of Post Holdings common stock at a price of $106.34 per share to cover tax withholding for the vesting of 2,834 RSUs.

What was the second tax-related share surrender reported by the Post (POST) executive?

On 11/15/2025, the officer surrendered 937 shares of Post Holdings common stock at $106.70 per share to pay tax withholding linked to the vesting of 2,127 RSUs.

How many Post Holdings (POST) shares does the reporting officer own after these transactions?

Following the reported tax-withholding transactions, the officer directly owned 50,078 shares of Post Holdings common stock.

Are the reported Post (POST) Form 4 transactions open-market sales?

No. The Form 4 explains that the transactions represent surrenders of shares to pay tax withholding due upon the vesting of RSUs, in accordance with Rule 16b-3, rather than discretionary open-market sales.

Who signed the Post Holdings (POST) Form 4 and under what authority?

The Form 4 was signed by Diedre J. Gray as Attorney-in-Fact for the reporting officer on 11/18/2025.