POST Form 4: 40,723 PRSUs; 18,570 at $107.19; holds 59,590

Rhea-AI Filing Summary

Post Holdings (POST) insider activity: On 10/22/2025, the company’s Pres & CEO, PCB reported acquiring 40,723 shares at $0 pursuant to a payout of earned performance share awards under Rule 16b-3. In a related move, 18,570 shares were surrendered to cover tax withholding at $107.19. Following these transactions, the executive directly holds 59,590 shares.

The PRSU payout was based on relative total shareholder return performance for the period from October 1, 2022 through September 30, 2025. The filing was made as a single-reporting-person Form 4.

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^*

CATOGGIO NICOLAS

(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)
	PRES & CEO, PCB

3. Date of Earliest Transaction (Month/Day/Year)
10/22/2025

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	10/22/2025		A		40,723(1)	A	$0	78,160	D
Common Stock	10/22/2025		F		18,570(2)	D	$107.19	59,590	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. Acquisition of shares pursuant to Rule 16b-3 upon payout of earned performance share award ("PRSUs") under a shareholder approved equity plan. The payout was based on the level of achievement of the performance goal of relative total shareholder return percentile rank for the performance period October 1, 2022 through September 30, 2025.

2. Surrender of shares in payment of tax withholding due as a result of the vesting of 40,723 PRSUs in accordance with Rule 16b-3.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	10/24/2025
	** 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?

Acquisition of 40,723 shares from earned PRSUs at $0 and surrender of 18,570 shares for tax withholding at $107.19 on 10/22/2025.

What is the CEO’s direct ownership after the transactions for POST?

Direct holdings total 59,590 shares after the reported transactions.

What performance period did the PRSUs cover for POST (POST)?

The PRSUs were earned based on relative total shareholder return from Oct 1, 2022 to Sep 30, 2025.

Which transaction codes were used in the POST Form 4?

Code A for acquisition via PRSU payout and code F for shares surrendered to cover taxes.

Was the POST transaction under Rule 16b-3?

Yes. The PRSU payout and related withholding were reported in accordance with Rule 16b-3.

Who is the reporting person’s role at Post Holdings (POST)?

The reporting person is an Officer, titled PRES & CEO, PCB.