John E. Heller, Chief Executive Officer and Director of Amentum Holdings, Inc., filed a Form 4 on November 10, 2026, reporting the vesting of restricted stock units and a related tax-withholding share disposition that occurred on November 6, 2026.

Key Highlights

  • RSU vesting: 39,618 shares of common stock were acquired by Heller on November 6, 2026, upon the vesting of restricted stock units (transaction code M).
  • Tax withholding disposal: 17,868 shares were disposed of at $21.25 per share to cover tax withholding obligations on the same date (transaction code F).
  • Resulting ownership: Following both transactions, Heller directly held 397,769 shares of common stock, according to the filing.
  • RSU structure: The filing states that one-third of the restricted stock units vest and are delivered, net of tax withholding, on each of the first, second, and third anniversaries of the grant date.
  • Derivative position: After the vesting transaction, Heller retained 39,618 restricted stock units, each representing a contingent right to receive one share of common stock.

Heller's RSU Vesting and Share Withholding at Amentum Holdings

According to the Form 4 filed with the SEC, John E. Heller, who serves as Chief Executive Officer and Director of Amentum Holdings, Inc. (NYSE:AMTM), reported two transactions in common stock on November 6, 2026. The first was the acquisition of 39,618 shares through the vesting of restricted stock units, recorded under transaction code M. The filing states this "represents distribution of AMTM common stock upon vesting of restricted stock units."

Concurrent with the vesting, the filing reports that 17,868 shares were disposed of under transaction code F at a price of $21.25 per share. The filing describes this as the "number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units." After these two transactions, Heller's direct beneficial ownership stood at 397,769 shares of common stock.

In Table II, the filing reports that 39,618 restricted stock units were settled through the vesting event (transaction code M), with a remaining balance of 39,618 restricted stock units still held directly. The filing notes that each restricted stock unit represents a contingent right to receive one share of AMTM common stock, and that the award vests in equal one-third installments on each of the first, second, and third anniversaries of the grant date. The Form 4 was signed by Indira Lall as attorney-in-fact on November 10, 2026.

What Was Disclosed

The filing disclosed an RSU vesting event and a tax-withholding share disposal by Amentum Holdings CEO John E. Heller on November 6, 2026, resulting in direct beneficial ownership of 397,769 shares and a remaining RSU balance of 39,618 units.