Transaction #23664 · Form 4 · 0001628280-25-058286
Amentum Holdings, Inc. · Exercise / conversion · Common Stock
Amentum Holdings, Inc. · Transacted December 17, 2025 · Filed December 19, 2025
What does this filing report?
An SEC Form 4 filing for Amentum Holdings, Inc. records an exercise / conversion involving Common Stock on December 17, 2025. The reported quantity was 9,298. The filing date is December 19, 2025. This is one transaction record; amounts are not allocated among any joint reporting owners.
The acquisition category describes how securities were received. It does not by itself establish a cash purchase of common stock. Read the transaction code definitionsand the original filing before interpreting the amounts.
Transaction details
- Company
- Amentum Holdings, Inc.
- Company CIK
- 0002011286
- Security type
- Non-derivative
- Acquisition type
- Exercise / conversion · Code M
- Quantity acquired
- 9,298
- Reported price
- Not reported · See footnotes
- Reference value
- Not reported
- Currency
- Currency not specified
- Ownership
- Direct
- Holdings after transaction
- 30,332
- Ownership description
- Not reported
- SEC acceptance time
- Dec 19, 2025, 4:19 PM EST
- 10b5-1 indication
- Not indicated
Reference value is reported quantity × reported price. It is not a confirmed cash payment or an estimate of a derivative's economic value. A missing currency is not assumed to be USD.
Reporting owners
- Mullen Sean Thomas ↗
Chief Growth Officer
CIK 0002034388
These are the reporting owners named in the filing. Quantities and amounts are not allocated among co-reporters. Roles reflect this filing, not a current profile.
Company listings
The linked listing is identified separately from other current company listings.
Filing footnotes & remarks
- F1
- Represents distribution of AMTM common stock upon vesting of restricted stock units.
- F2
- Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.
- F3
- Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.
- F4
- The restricted stock units awarded vested on December 17, 2025.
Footnotes are reproduced as plain text from the current source filing. For the full context, read the original SEC filing.
This record was updated Eastern Time. This is the stored record update time, not the transaction date. Report a correction.