Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| Amentum Holdings, Inc.AMTM · Entity 3920 | Chief People Officer | December 05, 2025 | December 09, 2025 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
Amentum Holdings, Inc.
Report date December 05, 2025 · Filed December 09, 2025
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 23,600 |
Ending reported balance
After 2025-12-05 transaction · row 2
2 source rows · reconciled sequenceRow 1 · 2025-12-05 · Exercise / conversion · Acquired 2,721 · Balance 24,992 F1: Represents distribution of AMTM common stock upon vesting of restricted stock units. Row 2 · 2025-12-05 · Tax withholding · Disposed 1,392 · Balance 23,600 F2: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. |
| Restricted Stock UnitsSEC Table II · derivative / convertible security | Direct | 5,444 |
Reported balance
After 2025-12-05 transaction · row 3
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 3 · 2025-12-05 · Exercise / conversion · Disposed 2,721 · Balance 5,444 F3: Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. F1: Represents distribution of AMTM common stock upon vesting of restricted stock units. F4: The restricted stock units awarded vested on December 5, 2025. |
Filing footnotes · ownership attribution and instrument terms
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 5, 2025.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| December 05, 2025 Filed Dec 9, 2025 16:28 UTC | Amentum Holdings, Inc. AMTM · Entity 3920 | Exercise / conversionRestricted Stock Units · Derivative | 2,721 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-056097 · wk-form4_1765315717.xml · derivative · entry 3 Burton Darren · CIK 0002044904 · Chief People Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,444 Underlying: Common Stock · 2,721 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. F1 · kind: Represents distribution of AMTM common stock upon vesting of restricted stock units. F4 · derivative.exercise_date: The restricted stock units awarded vested on December 5, 2025. F4 · derivative.expiration_date: The restricted stock units awarded vested on December 5, 2025. Read SEC document |
| December 05, 2025 Filed Dec 9, 2025 16:28 UTC | Amentum Holdings, Inc. AMTM · Entity 3920 | Tax withholdingCommon Stock | 1,392 | $28.88 | $40,200.96 |
DisclosureSEC source: 0001628280-25-056097 · wk-form4_1765315717.xml · nonDerivative · entry 2 Burton Darren · CIK 0002044904 · Chief People Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 23,600 F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units. Read SEC document |
| December 05, 2025 Filed Dec 9, 2025 16:28 UTC | Amentum Holdings, Inc. AMTM · Entity 3920 | Exercise / conversionCommon Stock | 2,721 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001628280-25-056097 · wk-form4_1765315717.xml · nonDerivative · entry 1 Burton Darren · CIK 0002044904 · Chief People Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 24,992 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · price: Represents distribution of AMTM common stock upon vesting of restricted stock units. Read SEC document |
| November 17, 2025 Filed Nov 19, 2025 17:47 UTC | Amentum Holdings, Inc. AMTM · Entity 3920 | GrantCommon Stock | 22,271 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-053278 · wk-form4_1763592459.xml · nonDerivative · entry 1 Burton Darren · CIK 0002044904 · Chief People Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 22,271 F1 · shares: One-third of the restricted stock units shall vest on each of the first, second and third anniversaries of November 17, 2025. Read SEC document |
| December 05, 2024 Filed Dec 9, 2024 16:06 UTC | Amentum Holdings, Inc. AMTM · Entity 3920 | GrantRestricted Stock Units · Derivative | 8,165 | $0.00 | $0.00 |
DisclosureSEC source: 0002011286-24-000048 · wk-form4_1733778368.xml · derivative · entry 1 Burton Darren · CIK 0002044904 · Chief People Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 8,165 Underlying: Common Stock · 8,165 shares Expires not disclosed F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of AMTM common stock. F2 · derivative.exercise_date: One-third of the restricted stock units shall vest and be delivered on each of the first, second and third anniversaries of the date of grant. F2 · derivative.expiration_date: One-third of the restricted stock units shall vest and be delivered on each of the first, second and third anniversaries of the date of grant. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.