Post Holdings director Zadoks acquires 40,710 shares

The PRSU performance goal used relative total shareholder return percentile rank over the period from October 1, 2023, through September 30, 2026.

Rhea-AI Filing Summary

Post Holdings, Inc. director Jeff A. Zadoks reported acquiring 40,710 common shares on October 22, 2026, through payout of earned performance share awards (PRSUs), based on achievement of a relative total shareholder return percentile-rank goal. On the same date, he surrendered 17,933 shares for tax withholding, at a reported $78.06 per share. Indirect holdings listed are 686 shares by Family Trust, 122,740 by SLAT (Reporting Person), and 74,360 by SLAT (Spouse).

Insider Trade Summary

5 transactions reported

Mixed 5 txns

Insider Zadoks Jeff A

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	40,710	$0.00	$0.00
Tax Withholding	Common Stock F2	17,933	$78.06	$1.40M
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 24,577 shares (Direct); Common Stock — 686 shares (Indirect, By Family Trust); Common Stock — 122,740 shares (Indirect, By SLAT (Reporting Person)); Common Stock — 74,360 shares (Indirect, By SLAT (Spouse))

Footnotes (2)

1. 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.
2. F2. Surrender of shares in payment of tax withholding due as a result of the vesting of 40,710 PRSUs in accordance with Rule 16b-3.

Key Figures

Common shares acquired: 40,710 shares Shares surrendered for tax withholding: 17,933 shares Reported price per share for tax withholding: $78.06 per share +3 more

6 metrics

Common shares acquired 40,710 shares Payout of earned performance share awards on October 22, 2026

Shares surrendered for tax withholding 17,933 shares October 22, 2026

Reported price per share for tax withholding $78.06 per share October 22, 2026

Indirect shares held by Family Trust 686 shares Holding listed on October 22, 2026

Indirect shares held by SLAT (Reporting Person) 122,740 shares Holding listed on October 22, 2026

Indirect shares held by SLAT (Spouse) 74,360 shares Holding listed on October 22, 2026

Key Terms

PRSUs, Rule 16b-3, relative total shareholder return percentile rank

3 terms

PRSUs financial

"payout of earned performance share award (PRSUs)"

A PRSU is a type of employee equity award that turns into actual company shares only if preset performance goals are met over a specified time. Think of it like a prize that only pays out when a team hits agreed targets; investors watch PRSUs because they tie management pay to results, can increase the number of shares outstanding when paid, and therefore affect shareholder value and incentives.

Rule 16b-3 regulatory

"in accordance with Rule 16b-3"

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"

FAQ

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

How many shares did POST director Jeff A. Zadoks acquire?

Jeff A. Zadoks acquired 40,710 common shares on October 22, 2026, through payout of earned performance share awards. The payout was based on achievement of the relative total shareholder return percentile-rank goal, and no Rule 10b5-1 plan is reported.

How many POST shares did Jeff A. Zadoks surrender for tax withholding?

Jeff A. Zadoks surrendered 17,933 shares on October 22, 2026, for tax withholding resulting from vesting of the PRSUs. The reported price was $78.06 per share.

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

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Available on EDGAR 10/26/2026 - 04:46 PM EDT Accepted by SEC EDGAR 10/26/2026 - 04:46 PM EDT Learn about SEC filing dates

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^*

Zadoks Jeff A

(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)

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/22/2026		A		40,710(1)	A	$0	42,510	D
Common Stock	10/22/2026		F		17,933(2)	D	$78.06	24,577	D
Common Stock								686	I	By Family Trust
Common Stock								122,740	I	By SLAT (Reporting Person)
Common Stock								74,360	I	By SLAT (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

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 40,710 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)