Form 4: Post Holdings CFO's RSU Vesting and Tax-Related Stock Sales

Matthew J. Mainer, EVP, CFO & Treasurer of Post Holdings, Inc., reported the vesting of restricted stock units and subsequent sale of shares to cover tax obligations.

Summary

• Matthew J. Mainer, EVP, CFO & Treasurer of Post Holdings, Inc., reported transactions involving the vesting of Restricted Stock Units (RSUs) and subsequent sales of common stock on November 12, 2025.
• Mainer acquired 6,008 shares of common stock upon the vesting of RSUs at a price of $0, which vested on the first anniversary of their grant date.
• Concurrently, he disposed of 2,647 shares of common stock at $106.02 per share to satisfy tax withholding obligations related to the vesting of these 6,008 RSUs.
• Additionally, Mainer acquired another 3,916 shares of common stock from the vesting of RSUs at a price of $0, representing a one-third vesting portion of a separate grant.
• He then disposed of 1,725 shares of common stock at $106.02 per share to cover tax withholding due to the vesting of these 3,916 RSUs.
• Following these transactions, Mainer directly beneficially owns 52,264 shares of Post Holdings, Inc. Common Stock and 7,833 Restricted Stock Units.

Sentiment

Score: 5

Explanation: The filing reports routine insider transactions related to executive compensation (RSU vesting and tax-related share sales), which are generally neutral in sentiment as they are expected events.

Positives

• The vesting of 9,924 Restricted Stock Units (RSUs) indicates the successful achievement of performance or time-based criteria for executive compensation.
• The transactions are part of a long-term incentive plan, aligning executive interests with shareholder value over time.

Negatives

• Matthew J. Mainer disposed of a total of 4,372 shares of common stock (2,647 + 1,725) to cover tax withholding, which reduces his direct equity ownership in the company.

Future Outlook

The filing does not provide forward-looking statements or guidance beyond the details of the reported transactions and the remaining unvested RSUs.

Industry Context

The reported transactions reflect a standard practice in executive compensation within publicly traded companies, where Restricted Stock Units (RSUs) vest over time, and a portion of the resulting shares are often sold to cover statutory tax withholding obligations. This is a routine event for executives receiving equity-based compensation.

Comparison to Industry Standards

• The use of Restricted Stock Units (RSUs) as a component of executive compensation is a common practice across various industries, including the consumer packaged goods sector where Post Holdings operates.
• The mechanism of surrendering shares to cover tax withholding upon RSU vesting is a standard, widely adopted method to manage the tax implications of equity compensation, consistent with practices observed in companies like General Mills, Kellogg Company, or Conagra Brands.
• The vesting schedules (e.g., first anniversary, one-third annually) are typical for long-term incentive plans designed to retain executives and align their interests with long-term shareholder value, comparable to those seen in peer companies.

Corporate Governance

Stakeholder Impact

• Shareholders: The transactions represent a routine part of executive compensation and do not indicate a significant change in the company's operational or financial health. The sale of shares for tax purposes is a common occurrence and not typically a signal of management's lack of confidence.
• Employees: The filing highlights the company's use of equity-based incentive plans, which can be a positive for employee retention and motivation, particularly for executives.

Next Steps

• Future vestings of the remaining 7,833 Restricted Stock Units are expected on the second and third anniversaries of their grant date, subject to the terms of the applicable award agreement.

Key Dates

Keywords

Post Holdings, POST, Form 4, Insider Transaction, RSU Vesting, Stock Sale, Executive Compensation, Matthew J. Mainer, Equity Compensation, Tax Withholding