Form 4: Amentum Executive Chair's Stock Vesting and Tax Sale

Amentum Holdings Executive Chair Steven J. Demetriou reported the vesting of restricted stock units and a subsequent sale of shares for tax withholding.

Summary

• Steven J. Demetriou, Executive Chair and Director of Amentum Holdings, Inc. (AMTM), reported transactions on November 6, 2025.
• 90,727 shares of AMTM common stock were acquired upon the vesting of restricted stock units.
• 28,818 shares of AMTM common stock were disposed of at a price of $21.79 per share to cover tax withholding obligations related to the RSU vesting.
• Following these transactions, Mr. Demetriou directly beneficially owns 682,802 shares of common stock.
• Additionally, 23,550 shares are indirectly beneficially owned by his spouse.

Sentiment

Score: 6

Explanation: The vesting of restricted stock units is a positive event for the executive, reflecting earned compensation. The subsequent sale for tax purposes is a routine, non-discretionary action. Overall, the sentiment is neutral to slightly positive as it indicates the normal functioning of executive compensation plans.

Positives

• The vesting of 90,727 restricted stock units indicates a successful fulfillment of compensation terms for the Executive Chair.
• The transaction reflects ongoing executive compensation and alignment with shareholder interests through equity ownership.

Negatives

• 28,818 shares of common stock were sold, reducing direct beneficial ownership, although this was for tax withholding purposes.

Future Outlook

This filing is a report of past insider transactions and does not contain forward-looking statements or guidance regarding the company's future performance.

Industry Context

This is a routine insider transaction filing (Form 4) reporting the vesting of executive compensation and a subsequent tax-related stock sale. It does not provide broader industry context or competitive analysis.

Stakeholder Impact

• Shareholders: Minor, routine insider transaction that does not significantly alter the company's fundamentals or strategic direction. It reflects standard executive compensation practices.

Key Dates

Recommendation

This Form 4 filing details a routine insider transaction involving the vesting of restricted stock units and a subsequent sale of shares for tax withholding. Such transactions are common and pre-scheduled, and they do not provide new information about the company's operational performance, financial health, or strategic outlook. Therefore, this filing alone does not warrant a change in investment recommendation; a 'hold' stance is appropriate as it does not impact the fundamental investment thesis for Amentum Holdings.

Keywords

Amentum Holdings, AMTM, Steven J. Demetriou, Form 4, Insider Transaction, Restricted Stock Units, RSU Vesting, Stock Sale, Tax Withholding, Executive Compensation