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

Rhea-AI Filing Summary

Post Holdings, Inc. (POST) executive stock awards disclosed. The company’s EVP, CFO & Treasurer reported receiving two grants of restricted stock units (RSUs) on 11/18/2025. One grant covers 17,338 RSUs that vest in equal annual installments over three years, and another grant covers 8,123 RSUs that vest in full on the first anniversary of the grant date. Each RSU represents the right to receive one share of Post common stock, granted at a price of $0 under the Amended and Restated 2021 Long-Term Incentive Plan in transactions exempt under Rule 16b-3. Following these grants, the executive beneficially owned 75,539 shares of Post common stock directly.

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)
11/18/2025

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	11/18/2025		A		17,338(1)	A	$0	67,416	D
Common Stock	11/18/2025		A		8,123(2)	A	$0	75,539	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. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Post Holdings, Inc. ("Post") common stock. The RSUs were granted under the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan (the "A&R 2021 LTIP") in a transaction exempt under Rule 16b-3 and vest in equal annual increments over three years, subject to the terms of the award agreement.

2. Each RSU represents a contingent right to receive one share of Post common stock. The RSUs were granted under the A&R 2021 LTIP in a transaction exempt under Rule 16b-3 and vest in full on the first anniversary of the date of grant, subject to the terms of the award agreement.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	11/20/2025
	** 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 report in this Form 4?

The Form 4 reports that Post Holdings’ EVP, CFO & Treasurer received two grants of restricted stock units (RSUs) on 11/18/2025 under the company’s long-term incentive plan.

How many RSUs were granted to the Post Holdings EVP, CFO & Treasurer?

The executive received 17,338 RSUs that vest over three years and an additional 8,123 RSUs that vest in full on the first anniversary of the grant date.

What does each RSU represent for POST stock?

Each RSU represents a contingent right to receive one share of Post Holdings, Inc. common stock, subject to the applicable vesting terms and award agreement.

Under which plan were the POST RSUs granted?

The RSUs were granted under the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan, described as the A&R 2021 LTIP.

What are the vesting terms of the new POST RSU awards?

The 17,338 RSUs vest in equal annual increments over three years, while the 8,123 RSUs vest in full on the first anniversary of the grant date, in each case subject to the award agreement.

How many POST shares does the executive beneficially own after these transactions?

After the reported RSU grants, the executive beneficially owned 75,539 shares of Post Holdings common stock in direct ownership.

Were the POST RSU grants part of an exempt transaction?

Yes. The RSU awards were granted in transactions described as exempt under Rule 16b-3 and were made at a grant price of $0.