Jeff A. Zadoks - 02 Jan 2026 Form 4 Insider Report for Post Holdings, Inc. (POST)

Reporting relationship: EVP & COO
Issuer ticker: POST
Reported as of: 02 Jan 2026
Net transaction value: -$116,780
SEC form: 4
Accepted by SEC: 06 Jan 2026, 16:59:26 UTC
Prior SEC filing: 03 Dec 2025
Next SEC filing: 16 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Diedre J. Gray, Attorney-in-Fact

Key filing fact

Jeff A. Zadoks filed Form 4 for Post Holdings, Inc. (POST) on 06 Jan 2026.

Key facts

This page summarizes Jeff A. Zadoks's Form 4 filing for Post Holdings, Inc. (POST).
5 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 06 Jan 2026, 16:59.

Change

Previous filing in this sequence was filed on 03 Dec 2025.
Current net transaction value: -$116,780.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001343352 Primary reporting owner

Zadoks Jeff A

Relationship: EVP & COO
Address: C/O POST HOLDINGS, INC., 2503 S. HANLEY ROAD, ST. LOUIS
Signature: /s/ Diedre J. Gray, Attorney-in-Fact
Signature date: 06 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

POST transaction

Common Stock

Tax liability

Transaction value: $29,814
Shares: -301
Change %: -1.1%
Price: $99.05
Shares after: 27,424
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F1

POST transaction

Common Stock

Tax liability

Transaction value: $41,601
Shares: -420
Change %: -1.5%
Price: $99.05
Shares after: 27,004
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F2

POST transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +9,731
Change %: +36%
Price: $0.000000
Shares after: 36,735
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F3

POST transaction

Common Stock

Tax liability

Transaction value: $45,365
Shares: -458
Change %: -1.2%
Price: $99.05
Shares after: 36,277
Date: 02 Jan 2026
Ownership: Direct
Footnotes: F4

POST holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,256
Date: 02 Jan 2026
Ownership: By Family Trust

POST holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 68,145
Date: 02 Jan 2026
Ownership: By SLAT

POST holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 152,740
Date: 02 Jan 2026
Ownership: By Spouse

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

POST transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -9,731
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 02 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,731
Exercise price
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Jeff A. Zadoks is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 4 footnotes

Footnote F1

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").

Footnote F2

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.

Footnote F3

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.

Footnote F4

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.