Bruning Jill L 4

What Happened

• Jill L. Bruning, Chief Technology Officer of Amentum Holdings (AMTM), had restricted stock units (RSUs) vest on May 6, 2026. The filing shows conversion/exercise of 9,072 derivative awards into common shares (code M).
• To satisfy tax withholding on the vesting, 2,731 shares were tendered/disposed at $24.89 per share, for a withholding value of $67,975 (code F). The transactions are distributions upon RSU vesting rather than open-market purchases or voluntary sales.

Key Details

• Transaction date: 2026-05-06.
• Vesting/conversion: 9,072 RSUs converted to common stock (derivative conversion, code M).
• Tax withholding: 2,731 shares withheld at $24.89 each = $67,975 (code F).
• Footnotes: F1–F5 indicate these were RSU distributions (each RSU = 1 share), shares were withheld for taxes (F3), and the RSUs follow a staggered vesting schedule (half vest at 18 months and the remainder at 3 years). F2 notes 117 shares from the ESPP in March 2026 are included in holdings.
• Shares owned after the transactions: not specified in the filing.
• Filing timeliness: no late-filing indication noted in the report.

Context

• This is a routine RSU vesting event with mandatory tax withholding — common for executive compensation. The filing shows conversion of derivative awards (RSUs) into stock and the employer withholding shares to cover tax obligations (not an open-market sale or purchase).