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

Rhea-AI Filing Summary

Post Holdings, Inc. executive and EVP & COO filed a Form 4 detailing equity transactions tied to retirement on January 2, 2026. Several blocks of previously unvested restricted stock units (RSUs) granted under the company’s 2021 Long-Term Incentive Plan and its amended and restated version accelerated on that date.

For RSUs granted on November 14, 2023 and November 18, 2025, the executive surrendered 301 and 420 shares of common stock, respectively, at $99.05 per share to cover tax withholding under Rule 16b-3. Additional RSUs granted on November 12, 2024 also accelerated, with 9,731 RSUs reported as converted into common stock at an exercise price of $0.

Following these transactions, the executive reported 36,277 shares of common stock held directly, plus indirect holdings of 1,256 shares by a family trust, 68,145 shares by a SLAT, and 152,740 shares by a spouse. Settlement of the vested RSUs, net of additional tax withholding, will occur after a six‑month delay required under Section 409A of the Internal Revenue Code.

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

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X

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 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 & COO

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

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	01/02/2026		F		301(1)	D	$99.05	27,424	D
Common Stock	01/02/2026		F		420(2)	D	$99.05	27,004	D
Common Stock	01/02/2026		M		9,731(3)	A	$0	36,735	D
Common Stock	01/02/2026		F		458(4)	D	$99.05	36,277	D
Common Stock								1,256	I	By Family Trust
Common Stock								68,145	I	By SLAT
Common Stock								152,740	I	By 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
Restricted Stock Units	(3)	01/02/2026		M			9,731	(3)	(3)	Common Stock	9,731	$0	0	D

Explanation of Responses:

1. In accordance with the terms of the Post Holdings, Inc. 2021 Long-Term Incentive Plan, the vesting of the 6,401 unvested restricted stock units ("RSUs") granted on November 14, 2023, each of which represented a contingent right to receive one share of Post Holdings, Inc. ("Post") common stock on the third anniversary of the date of grant, accelerated as a result of the Reporting Person's retirement on January 2, 2026. The surrender of 301 shares of Post common stock was in payment of tax withholding due as a result of this vesting in accordance with Rule 16b-3. The settlement of the remaining shares of Post common stock underlying the vested RSUs, reduced for the withholding of additional taxes due at that time, will occur following the six-month delay required under Section 409A of the Internal Revenue Code (the "IRC").

2. In accordance with the terms of the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan (the "Plan"), the vesting of the 8,935 unvested RSUs granted on November 18, 2025, each of which represented a contingent right to receive one share of Post common stock on the first anniversary of the date of grant, accelerated as a result of the Reporting Person's retirement on January 2, 2026. The surrender of 420 shares of Post common stock was in payment of tax withholding due as a result of this vesting in accordance with Rule 16b-3. The settlement of the remaining shares of Post common stock underlying the vested RSUs, reduced for the withholding of additional taxes due at that time, will occur following the six-month delay required under Section 409A of the IRC.

3. In accordance with the terms of the Plan, the vesting of the unvested RSUs granted on November 12, 2024, each of which represented a contingent right to receive one share of Post common stock on the applicable vesting date (either the second or third anniversary of the date of grant), accelerated as a result of the Reporting Person's retirement on January 2, 2026. The settlement of the remaining shares of Post common stock underlying the vested RSUs, reduced for the withholding of additional taxes due at that time, will occur following the six-month delay required under Section 409A of the IRC.

4. Surrender of shares in payment of tax withholding due as a result of the accelerated vesting of 9,731 RSUs in accordance with Rule 16b-3.

Remarks:

	/s/ Diedre J. Gray, Attorney-in-Fact	01/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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