Form 4: Amentum Executive Chair Demetriou's Stock Activity

Amentum Holdings' Executive Chair, Steven J. Demetriou, reported significant stock transactions including RSU vesting, tax-related dispositions, and a new RSU award.

Summary

• Steven J. Demetriou, Executive Chair and Director of Amentum Holdings, Inc. (AMTM), reported transactions on November 17, 2025.
• 43,396 shares of AMTM common stock were acquired upon the vesting of restricted stock units (RSUs).
• 17,077 shares of AMTM common stock were disposed of at a price of $21.49 per share to cover tax withholding obligations related to the RSU vesting.
• A new award of 111,355 restricted stock units was granted, with a vesting price of $0.
• Following these transactions, direct beneficial ownership of common stock is 820,476 shares.
• An additional 23,550 shares are indirectly beneficially owned by a spouse.

Sentiment

Score: 6

Explanation: The filing reports routine insider transactions, including the vesting of existing equity awards and the grant of new ones. The new RSU grant indicates continued alignment of management's interests with the company's future performance, which is a slightly positive signal, despite the standard tax-related share disposition.

Positives

• The Executive Chair received a new grant of 111,355 restricted stock units, indicating continued alignment of management's interests with shareholder value.
• The vesting of 43,396 restricted stock units demonstrates the realization of previously granted equity compensation.

Negatives

• 17,077 shares were disposed of to cover tax withholding, resulting in a reduction of direct beneficial ownership.

Future Outlook

The newly awarded 111,355 restricted stock units are scheduled to vest and be delivered on November 17, 2026, which is the first anniversary of the grant date.

Stakeholder Impact

• Shareholders: The transactions represent routine equity compensation events for a key executive, maintaining management's vested interest in the company's performance.

Next Steps

• The newly awarded 111,355 restricted stock units are expected to vest on November 17, 2026.

Key Dates

Recommendation

This Form 4 filing details routine insider transactions related to executive compensation, specifically the vesting of restricted stock units, tax-related share dispositions, and a new RSU grant. These events are generally expected and do not signal a material change in the company's fundamentals or the executive's outlook that would warrant a 'buy' or 'sell' recommendation. It primarily reflects ongoing compensation structure and insider ownership alignment.

Keywords

Amentum Holdings, AMTM, Steven J. Demetriou, Form 4, Insider Trading, Restricted Stock Units, Equity Compensation, Stock Vesting, Tax Withholding