# EDGAR Filing Document

**Accession Number:** 0001343352
**File Stem:** 0001343352-26-000005
**Filing Date:** 2026-3
**Character Count:** 9721
**Document Hash:** 3e012ae604f85da32c81bf20a03563eb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001343352-26-000005.hdr.sgml**: 20260316

**ACCESSION NUMBER**: 0001343352-26-000005

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260315

**FILED AS OF DATE**: 20260316

**DATE AS OF CHANGE**: 20260316

**REPORTING-OWNER**: 

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

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35305
- **FILM NUMBER:** 26757837

**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

## Ex-24

<u>Exhibit 24</u>

SECTION 13 AND SECTION 16

POWER OF ATTORNEY

Know all by these presents that the undersigned hereby constitutes and appoints each of Diedre J. Gray, Elizabeth C. Minogue and Beth E. Frohlichstein, and their successors in office and designees, signing singly, the undersigned's true and lawful attorney-in-fact to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) take such actions as may be necessary or appropriate to submit and file forms, schedules and other documents with the U.S. Securities and Exchange Commission (the "SEC"), which actions may include (a) enrolling the undersigned in EDGAR Next and preparing, executing in the undersigned's name and on the undersigned's behalf and submitting to the SEC a Form ID, including amendments thereto, and any other documents and information as may be necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 13 or Section 16(a) of the Securities Exchange Act of 1934, as amended, or any rule or regulation promulgated thereunder (collectively, the "Exchange Act");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) execute and file for and on behalf of the undersigned, in the undersigned's capacity as a director, officer or beneficial owner of shares of stock of Post Holdings, Inc. (the "Company"), any Schedule 13D and Schedule 13G, and any amendments, supplements or exhibits thereto (including any joint filing agreements), in accordance with Section 13 of the Exchange Act, and any Forms 3, 4 and 5, and any amendments, supplements or exhibits thereto, in accordance with Section 16(a) of the Exchange Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Schedule 13D or Schedule 13G or any such Form 3, 4, or 5, or any amendment, supplement or exhibit thereto, and timely file such schedule or form with the SEC and any stock exchange or similar authority; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 13 and Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file reports under Section 16 of the Exchange Act with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this <u>10th</u> day of <u>March</u>, 2026.

<u>/s/ Jeff A. Zadoks&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u><br> Jeff A. Zadoks

NOTARIZATION

State of <u>Missouri</u>

City/County of <u>St. Louis</u>

This power of attorney was acknowledged before me on the <u>10</u> day of <u>March</u>, 2026 by <u>Marilyn A. Moultrie</u>.

<u>/s/ Marilyn A. Moultrie&nbsp;&nbsp;&nbsp;&nbsp;</u>

Notary Signature

[Notary Stamp]

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **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. Issuer Name and Ticker or Trading Symbol**<br>Post Holdings, Inc. [ POST ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-15 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<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 Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 36277<sup>(1)</sup> | D |  |
| Common Stock | 686 | I | By Family Trust |
| Common Stock | 48145 | I | By SLAT |
| Common Stock | 122740 | I | By Spouse |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) This balance includes 23,888 restricted stock units ("RSUs"), (i) which were previously granted to Reporting Person  in connection with his prior roles as an employee of Post Holdings, Inc. (the "Issuer") under either the Post Holdings, Inc. 2021 Long-Term Incentive Plan or the Post Holdings, Inc. Amended and Restated 2021 Long-Term Incentive Plan and (ii) the vesting of which accelerated according to the terms of the award agreements underlying the RSUs in conjunction with his retirement as an employee of the Issuer on January 2, 2026 (the "Retirement Date"). Each RSU represents a right to receive one share of the Issuer's common stock.  The settlement of these RSUs, reduced for the withholding of certain taxes due at that time, will occur following a six-month delay after the Retirement Date, as required under Section 409A of the Internal Revenue Code.

**Remarks:**
See attached Exhibit 24 - Power of Attorney.

**Signature:** /s/ Diedre J. Gray, Attorney-in-Fact  
**Date:** 2026-03-16

### 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.**