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William P. Stiritz filed Amendment No. 3 to Schedule 13D reporting his beneficial ownership in Post Holdings, Inc. (POST). He reports aggregate beneficial ownership of 4,882,968 shares of common stock, representing approximately 9.28% of outstanding shares.
The filing details sole voting and dispositive power over 4,498,836 shares and shared voting and dispositive power over 384,132 shares with his spouse, Susan Stiritz. Holdings include 4,329,467 shares held directly, 169,369 shares through The Wildwood Trust, and 384,132 shares via his spouse.
The amendment notes an open‑market purchase of 36,000 shares at $109.53 per share on August 19, 2025. Post Holdings had 52,604,677 shares outstanding as of October 15, 2025.
Dimensional Fund Advisors LP reports beneficial ownership of 2,812,423 shares of Post Holdings Inc common stock, representing 5.2% of the class. Dimensional states these shares are held for various funds it advises and disclaims direct beneficial ownership; the filing shows sole voting power over 2,737,432 shares and sole dispositive power over 2,812,423 shares. The statement affirms the holdings are held in the ordinary course of business and not for the purpose of changing control of the issuer. The schedule identifies Dimensional as an investment adviser and clarifies that the reported securities are owned by client Funds for which Dimensional provides investment management or advisory services.
Jennifer Kuperman Johnson, a Director of Post Holdings, Inc. (POST), reported deferred compensation credited as 103.376 stock equivalents on 09/30/2025. Those stock equivalents have no exercisable or expiration dates and are tracked under the company’s Deferred Compensation Plan for Non-Management Directors. The filing shows 6,100.362 shares of common stock beneficially owned by the reporting person following the reported transaction. The filing was signed on behalf of the reporting person by an attorney-in-fact on 10/02/2025.
David W. Kemper, a Director of Post Holdings, Inc. (POST), reported a deferred-compensation credit of 160.233 stock equivalents on 09/30/2025. The filing states these equivalents are part of the company’s Deferred Compensation Plan for Non-Management Directors and are credited shortly after the month in which the retainer is earned. The equivalents carry no exercise or expiration dates and are payable in cash on a one-for-one basis upon the director’s separation from the board. The report shows a per-share valuation of $107.48 for the underlying common stock and the reporting person’s total direct beneficial ownership after the transaction is 19,374.568 shares. The Form 4 was signed by an attorney-in-fact on 10/02/2025.
Director Thomas C. Erb reported on 09/30/2025 the acquisition of 103.376 Post Holdings, Inc. stock equivalents under the companys Deferred Compensation Plan for Non-Management Directors. The filing shows these equivalents were credited as compensation for his director retainer and carry no fixed exercise or expiration dates; they are distributable in cash on a one-for-one basis upon separation from the board. Following the reported transaction, Mr. Erb is recorded as beneficially owning 6,100.362 shares of Post Holdings common stock. The Form 4 was signed by an attorney-in-fact on 10/02/2025.
Dorothy M. Burwell, a director of Post Holdings, Inc. (POST), reported a deferred-compensation transaction dated 09/30/2025. She was credited with 103.376 Post Holdings stock equivalents under the company's Deferred Compensation Plan for Non-Management Directors, recorded at a per-unit value of $107.48. The filing shows 7,612.233 shares beneficially owned by Ms. Burwell following the transaction. The stock equivalents have no fixed exercise or expiration dates and are paid in cash on a one-for-one basis upon separation from the board.
Post Holdings insider transaction summary: Nicolas Catoggio, identified as President & CEO (PCB), reported a transaction dated 09/13/2025 related to the vesting of restricted stock units. In connection with the vesting of 13,846 restricted stock units, 6,314 shares of Post Holdings common stock were surrendered to satisfy tax withholding obligations at a price of $104.98 per share. After the transaction, the reporting person beneficially owned 37,437 shares, held directly.
The Form 4 indicates the disposition was a withholding surrender tied to compensation vesting rather than an open-market sale.
Post Holdings insider filing: Jeff A. Zadoks, EVP & COO of Post Holdings (POST), reported changes in beneficial ownership dated 09/04/2025. The Form 4 shows dispositions on that date including 1,330 shares (transaction code G) and 19,048 shares, leaving an indicated beneficial ownership of 1,256 shares held indirectly by a family trust. The filing also lists indirect holdings of 122,740 shares (by spouse) and 68,145 shares (by SLAT). The form is signed by an attorney-in-fact on 09/08/2025.
The Vanguard Group filed an amendment to Schedule 13G reporting ownership of Post Holdings Inc. common stock. Vanguard states it beneficially owns 5,597,831 shares, representing 10.3% of the class, with 5,249,853 shares of sole dispositive power and 290,339 shares of shared voting power. The filing notes shares are held in the ordinary course of business and not to influence control. The document provides issuer and filer addresses and confirms the filing date and signature by Vanguard's Head of Global Fund Administration.
Post Holdings director William P. Stiritz reported on Form 4 that 98.196 stock equivalents were credited to his account under the companys Deferred Compensation Plan for Non-Management Directors on 08/29/2025, valued at $113.15 each, representing 180,356.962 shares of Common Stock beneficially owned following the transaction. The disclosure explains these are deferred retainer payments that are credited administratively soon after the month earned and that the stock equivalents have no fixed exercise or expiration dates. Amounts are paid in cash one-for-one upon separation from the board.