Post Holdings' Westphal receives 38,441 shares

Q: How many POST shares did the president of Foodservice acquire and surrender?

On October 22, 2026, Mark W. Westphal acquired 38,441 common shares through an earned PRSU payout and surrendered 17,530 shares for tax withholding. The reported price for the surrendered shares was $78.06 per share.

The president of Foodservice's PRSU payout was based on relative total shareholder return percentile rank for October 1, 2023 through September 30, 2026.

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Rhea-AI Filing Summary

Post Holdings, Inc.'s president of Foodservice, Mark W. Westphal, acquired 38,441 common shares on October 22, 2026, upon payout of earned performance share units (PRSUs). On the same date, he surrendered 17,530 shares for tax withholding due to vesting of those awards; the reported price was $78.06 per share. A separate holding entry lists 17,444 shares held indirectly through the 401(k) Plan.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider WESTPHAL MARK W

Role PRES., FOODSERVICE

Type	Security	Shares	Price	Value
Grant/Award	Common Stock ^F1	38,441	$0.00	$0.00
Tax Withholding	Common Stock ^F2	17,530	$78.06	$1.37M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 218,667 shares (Direct); Common Stock — 17,443.826 shares (Indirect, By 401(k) Plan)

Footnotes (2)

F1. 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, 2023 through September 30, 2026.
F2. Surrender of shares in payment of tax withholding due as a result of the vesting of 38,441 PRSUs in accordance with Rule 16b-3.

Key Figures

Common shares acquired: 38,441 shares Shares surrendered for tax withholding: 17,530 shares Reported price per share: $78.06 per share +1 more

4 metrics

Common shares acquired 38,441 shares Earned PRSU payout on October 22, 2026

Shares surrendered for tax withholding 17,530 shares Following vesting of 38,441 PRSUs on October 22, 2026

Reported price per share $78.06 per share Tax-withholding surrender on October 22, 2026

Indirect 401(k) Plan holdings 17,444 shares Holding entry dated October 22, 2026

Key Terms

performance share award (PRSUs), Rule 16b-3, relative total shareholder return percentile rank, tax withholding

4 terms

Rule 16b-3 regulatory

"pursuant to Rule 16b-3 upon payout"

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

relative total shareholder return percentile rank financial

"performance goal of relative total shareholder return percentile rank"

tax withholding financial

"in payment of tax withholding due"

Tax withholding is the practice of taking a portion of a payment—such as wages, dividends, or sale proceeds—before it reaches the recipient and sending that portion to the tax authority as an advance on the recipient’s eventual tax bill. For investors it matters because withholding reduces immediate cash received and affects after‑tax returns, estimated tax payments, and whether you may owe more or receive a refund when taxes are finally calculated, like having a small automatic savings set aside for your tax bill.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many POST shares did the president of Foodservice acquire and surrender?

On October 22, 2026, Mark W. Westphal acquired 38,441 common shares through an earned PRSU payout and surrendered 17,530 shares for tax withholding. The reported price for the surrendered shares was $78.06 per share.

What determined the POST president's PRSU payout?

The payout was based on the level of achievement of the performance goal of relative total shareholder return percentile rank for the performance period from October 1, 2023 through September 30, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/26/2026 - 04:45 PM EDT Accepted by SEC EDGAR 10/26/2026 - 04:45 PM EDT

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
Estimated average burden
hours per response:			0.5

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^*

WESTPHAL MARK W

(Last)

(First)

(Middle)

C/O POST HOLDINGS, INC.

2503 S. HANLEY ROAD

(Street)

ST. LOUIS

MISSOURI

63144

(City)

(State)

(Zip)

UNITED STATES

(Country)

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., FOODSERVICE

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/22/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	10/22/2026		A		38,441⁽¹⁾	A	$0	236,197	D
Common Stock	10/22/2026		F		17,530⁽²⁾	D	$78.06	218,667	D
Common Stock								17,443.826	I	By 401(k) Plan

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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, 2023 through September 30, 2026.

2. Surrender of shares in payment of tax withholding due as a result of the vesting of 38,441 PRSUs in accordance with Rule 16b-3.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	10/26/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR