SCHEDULE: Stiritz Maintains 10.3% Stake in Post Holdings

William P. Stiritz has updated his beneficial ownership in Post Holdings, Inc., maintaining a 10.3% stake through direct holdings, a trust, and his spouse.

Summary

• William P. Stiritz beneficially owns 4,885,468 shares of Post Holdings, Inc. Common Stock.
• This represents approximately 10.29% of the Issuer's outstanding shares, based on 47,475,676 shares as of March 4, 2026.
• Ownership includes 4,331,967 shares held directly, 169,369 shares through The Wildwood Trust (of which Stiritz is Trustee), and 384,132 shares through his spouse, Susan Stiritz.
• Stiritz has sole voting and dispositive power over 4,501,336 shares and shared power over 384,132 shares with his spouse.
• No transactions in the Issuer's Common Stock were effected by the Reporting Person within the past sixty days.
• Stiritz was awarded 2,700 restricted stock units (2024 RSUs) on January 30, 2024, which vested on January 30, 2025.
• Settlement of the 2024 RSUs is deferred into ten annual installments, starting six months after his retirement from the Board on December 16, 2025.

Sentiment

Score: 7

Explanation: StockSavvy.ai views this filing as moderately positive, reflecting continued significant insider ownership and a long-term commitment from a key former director, which can instill confidence in the company's stability and future direction.

Positives

• William P. Stiritz, a long-term stakeholder, maintains a significant 10.29% beneficial ownership, indicating continued confidence in Post Holdings, Inc.
• The deferral of restricted stock unit settlement suggests a long-term perspective on his investment and alignment with shareholder interests post-retirement from the board.

Risks

• The settlement of 2,700 restricted stock units is subject to acceleration upon a change in control or the death of the Reporting Person, which could introduce liquidity events.

Future Outlook

The filing indicates a long-term commitment from William P. Stiritz through the deferred settlement of his restricted stock units, which will occur in ten annual installments beginning six months after his retirement from the Board on December 16, 2025.

Industry Context

StockSavvy.ai notes that a significant insider stake, such as William P. Stiritz's 10.29% in Post Holdings, Inc., can often be viewed positively by the market, signaling strong insider confidence, especially in the mature and competitive packaged food industry where stability and experienced leadership are valued. This level of ownership by a former director suggests continued alignment with long-term shareholder value, contrasting with more transient institutional holdings.

Management Changes

Related Party Transactions

• William P. Stiritz's beneficial ownership includes shares held by his spouse, Susan Stiritz, with whom he shares voting and disposition rights for 384,132 shares.
• The award of 2,700 restricted stock units to William P. Stiritz as a director of the Issuer.

Stakeholder Impact

• Shareholders: Continued significant insider ownership by a former director may be viewed as a positive signal of long-term commitment and confidence in the company's value.
• Management: The deferred settlement of RSUs aligns the former director's long-term interests with the company's performance.

Next Steps

• Settlement of 2,700 restricted stock units in ten annual installments, beginning six months after William P. Stiritz's retirement from the Board on December 16, 2025.

Key Dates

Recommendation

The filing primarily updates beneficial ownership information and details a former director's deferred equity settlement. It does not present new material information that would fundamentally alter the investment thesis for Post Holdings, Inc. The continued significant insider stake is a neutral to slightly positive signal, reinforcing a 'hold' position for existing investors rather than prompting a 'buy' or 'sell' action.

Keywords

Post Holdings, William P. Stiritz, Schedule 13D, Beneficial Ownership, Restricted Stock Units, Corporate Governance, Shareholder Stake, Food Industry