# EDGAR Filing Document

**Accession Number:** 0001343352
**File Stem:** 0001343352-26-000002
**Filing Date:** 2026-1
**Character Count:** 8411
**Document Hash:** 5e65fc1efb3e05de4a0b5f3eff5cf929
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001343352-26-000002.hdr.sgml**: 20260106

**ACCESSION NUMBER**: 0001343352-26-000002

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260102

**FILED AS OF DATE**: 20260106

**DATE AS OF CHANGE**: 20260106

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Zadoks Jeff A
- **CENTRAL INDEX KEY:** 0001343352

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35305
- **FILM NUMBER:** 26512556

**MAIL ADDRESS:**
- **STREET 1:** 2503 S. HANLEY ROAD
- **CITY:** ST. LOUIS
- **STATE:** MO
- **ZIP:** 63144
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Post Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001530950
- **STANDARD INDUSTRIAL CLASSIFICATION:** GRAIN MILL PRODUCTS [2040]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 453355106
- **STATE OF INCORPORATION:** MO
- **FISCAL YEAR END:** 0930

**BUSINESS ADDRESS:**
- **STREET 1:** 2503 S. HANLEY ROAD
- **CITY:** ST. LOUIS
- **STATE:** MO
- **ZIP:** 63144
- **BUSINESS PHONE:** 314-644-7600

**MAIL ADDRESS:**
- **STREET 1:** 2503 S. HANLEY ROAD
- **CITY:** ST. LOUIS
- **STATE:** MO
- **ZIP:** 63144

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[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**<sup>*</sup><br>Zadoks Jeff A<br><sub>(Last) (First) (Middle)</sub><br>C/O POST HOLDINGS, INC.<br>2503 S. HANLEY ROAD<br><sub>(Street)</sub><br>ST. LOUIS, MO 63144<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-01-02 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_EVP & COO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Post Holdings, Inc. [ POST ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-01-02 |  | F |  | 301<sup>(1)</sup> | D | $99.05 | 27424 | D |  |
| Common Stock | 2026-01-02 |  | F |  | 420<sup>(2)</sup> | D | $99.05 | 27004 | D |  |
| Common Stock | 2026-01-02 |  | M |  | 9731<sup>(3)</sup> | A | $0 | 36735 | D |  |
| Common Stock | 2026-01-02 |  | F |  | 458<sup>(4)</sup> | D | $99.05 | 36277 | D |  |
| Common Stock |  |  |  |  |  |  |  | 1256 | I | By Family Trust |
| Common Stock |  |  |  |  |  |  |  | 68145 | I | By SLAT |
| Common Stock |  |  |  |  |  |  |  | 152740 | I | By Spouse |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Stock Units | <sup>(3)</sup> | 2026-01-02 |  | M |  |  | 9731 | <sup>(3)</sup> | <sup>(3)</sup> | Common Stock | 9731 | $0 | 0 | D |  |

---

### Footnotes:

(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.

**Signature:** /s/ Diedre J. Gray, Attorney-in-Fact  
**Date:** 2026-01-06

### Remarks:

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.**