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AMTM

Amentum Holdings, Inc.

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3920
SEC CIK
0002011286
Parsed reports
112

Last 12 months

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0 purchase rows · 0 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
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MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202600
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Purchases/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 dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
November 17, 2025 Filed Nov 19, 2025 22:25 UTC
DEMETRIOU STEVEN J.Director · Executive Chair
Exercise / conversionCommon Stock 43,396 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-053259 · wk-form4_1763591106.xml · nonDerivative · entry 1

DEMETRIOU STEVEN J. · CIK 0001173003 · Director · Executive Chair

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 726,198

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 17:40 UTC
St. Mary Michele TChief Legal Officer & GC
GrantCommon Stock 22,271 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053272 · wk-form4_1763592004.xml · nonDerivative · entry 1

St. Mary Michele T · CIK 0002057553 · Chief Legal Officer & GC

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
November 17, 2025 Filed Nov 19, 2025 17:47 UTC
Burton DarrenChief People Officer
GrantCommon Stock 22,271 $0.00 $0.00
Disclosure

SEC 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
November 17, 2025 Filed Nov 19, 2025 22:49 UTC
Bruning Jill LChief Technology Officer
GrantCommon Stock 17,817 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053280 · wk-form4_1763592584.xml · nonDerivative · entry 1

Bruning Jill L · CIK 0002037037 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,198

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
November 17, 2025 Filed Nov 19, 2025 22:53 UTC
Mullen Sean ThomasChief Growth Officer
GrantCommon Stock 17,817 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053285 · wk-form4_1763592827.xml · nonDerivative · entry 1

Mullen Sean Thomas · CIK 0002034388 · Chief Growth Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,034

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
November 17, 2025 Filed Nov 19, 2025 22:52 UTC
Heller John E.Director · Chief Executive Officer
GrantCommon Stock 155,897 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053283 · wk-form4_1763592731.xml · nonDerivative · entry 1

Heller John E. · CIK 0001552715 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 269,440

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
November 17, 2025 Filed Nov 19, 2025 22:45 UTC
Johnson Travis BartonChief Financial Officer
GrantCommon Stock 100,220 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053276 · wk-form4_1763592337.xml · nonDerivative · entry 1

Johnson Travis Barton · CIK 0001795038 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 108,675

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
November 17, 2025 Filed Nov 19, 2025 22:36 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 1,178 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053268 · wk-form4_1763591795.xml · derivative · entry 4

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,178 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.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of AMTM common stock.

F5 · derivative.exercise_date: The restricted stock units awarded vested on November 17, 2025.

F5 · derivative.expiration_date: The restricted stock units awarded vested on November 17, 2025.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 22:36 UTC
Arnette Stephen AChief Operating Officer
GrantCommon Stock 46,769 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-053268 · wk-form4_1763591795.xml · nonDerivative · entry 3

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 93,725

F3 · 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
November 17, 2025 Filed Nov 19, 2025 22:36 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 287 $21.49 $6,167.63
Disclosure

SEC source: 0001628280-25-053268 · wk-form4_1763591795.xml · nonDerivative · entry 2

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,956

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 17, 2025 Filed Nov 19, 2025 22:36 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 1,178 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-053268 · wk-form4_1763591795.xml · nonDerivative · entry 1

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,243

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 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 4,596 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · derivative · entry 12

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,596 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.

F5 · derivative.exercise_date: The restricted stock units awarded vested on November 16, 2025.

F5 · derivative.expiration_date: The restricted stock units awarded vested on November 16, 2025.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 3,681 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · derivative · entry 11

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,681 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.

F5 · derivative.exercise_date: The restricted stock units awarded vested on November 16, 2025.

F5 · derivative.expiration_date: The restricted stock units awarded vested on November 16, 2025.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 5,053 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · derivative · entry 10

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,053

Underlying: Common Stock · 5,053 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.

F5 · derivative.exercise_date: The restricted stock units awarded vested on November 16, 2025.

F5 · derivative.expiration_date: The restricted stock units awarded vested on November 16, 2025.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 1,120 $22.07 $24,718.40
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 8

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,065

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 4,596 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 7

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 47,185

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 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 897 $22.07 $19,796.79
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 6

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,589

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 3,681 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 5

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,486

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 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 1,231 $22.07 $27,168.17
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 4

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,805

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 16, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 5,053 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 3

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,036

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 15, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 5,758 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · derivative · entry 9

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,515

Underlying: Common Stock · 5,758 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 November 15, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 15, 2025.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 1,403 $22.07 $30,964.21
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 2

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,983

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 15, 2025 Filed Nov 18, 2025 21:57 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 5,758 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-052958 · wk-form4_1763503027.xml · nonDerivative · entry 1

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,386

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 06, 2025 Filed Nov 10, 2025 21:44 UTC
DEMETRIOU STEVEN J.Director · Executive Chair
Exercise / conversionRestricted Stock Units · Derivative 90,727 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051110 · wk-form4_1762811038.xml · derivative · entry 4

DEMETRIOU STEVEN J. · CIK 0001173003 · Director · Executive Chair

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 90,727 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:44 UTC
DEMETRIOU STEVEN J.Director · Executive Chair
Tax withholdingCommon Stock 28,818 $21.79 $627,944.22
Disclosure

SEC source: 0001628280-25-051110 · wk-form4_1762811038.xml · nonDerivative · entry 2

DEMETRIOU STEVEN J. · CIK 0001173003 · Director · Executive Chair

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 682,802

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:44 UTC
DEMETRIOU STEVEN J.Director · Executive Chair
Exercise / conversionCommon Stock 90,727 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051110 · wk-form4_1762811038.xml · nonDerivative · entry 1

DEMETRIOU STEVEN J. · CIK 0001173003 · Director · Executive Chair

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 711,620

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 06, 2025 Filed Nov 10, 2025 21:46 UTC
Bruning Jill LChief Technology Officer
Exercise / conversionRestricted Stock Units · Derivative 4,838 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051117 · wk-form4_1762811169.xml · derivative · entry 3

Bruning Jill L · CIK 0002037037 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,678

Underlying: Common Stock · 4,838 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:46 UTC
Bruning Jill LChief Technology Officer
Tax withholdingCommon Stock 1,457 $21.79 $31,748.03
Disclosure

SEC source: 0001628280-25-051117 · wk-form4_1762811169.xml · nonDerivative · entry 2

Bruning Jill L · CIK 0002037037 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,381

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:46 UTC
Bruning Jill LChief Technology Officer
Exercise / conversionCommon Stock 4,838 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051117 · wk-form4_1762811169.xml · nonDerivative · entry 1

Bruning Jill L · CIK 0002037037 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,838

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 06, 2025 Filed Nov 10, 2025 21:44 UTC
Mullen Sean ThomasChief Growth Officer
Exercise / conversionRestricted Stock Units · Derivative 4,838 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051113 · wk-form4_1762811081.xml · derivative · entry 3

Mullen Sean Thomas · CIK 0002034388 · Chief Growth Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,678

Underlying: Common Stock · 4,838 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:44 UTC
Mullen Sean ThomasChief Growth Officer
Tax withholdingCommon Stock 1,621 $21.79 $35,321.59
Disclosure

SEC source: 0001628280-25-051113 · wk-form4_1762811081.xml · nonDerivative · entry 2

Mullen Sean Thomas · CIK 0002034388 · Chief Growth Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,217

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:44 UTC
Mullen Sean ThomasChief Growth Officer
Exercise / conversionCommon Stock 4,838 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051113 · wk-form4_1762811081.xml · nonDerivative · entry 1

Mullen Sean Thomas · CIK 0002034388 · Chief Growth Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,838

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 06, 2025 Filed Nov 10, 2025 21:46 UTC
Johnson Travis BartonChief Financial Officer
Exercise / conversionRestricted Stock Units · Derivative 12,097 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051118 · wk-form4_1762811204.xml · derivative · entry 3

Johnson Travis Barton · CIK 0001795038 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,194

Underlying: Common Stock · 12,097 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:46 UTC
Johnson Travis BartonChief Financial Officer
Tax withholdingCommon Stock 3,642 $21.79 $79,359.18
Disclosure

SEC source: 0001628280-25-051118 · wk-form4_1762811204.xml · nonDerivative · entry 2

Johnson Travis Barton · CIK 0001795038 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,455

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:46 UTC
Johnson Travis BartonChief Financial Officer
Exercise / conversionCommon Stock 12,097 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051118 · wk-form4_1762811204.xml · nonDerivative · entry 1

Johnson Travis Barton · CIK 0001795038 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,097

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 06, 2025 Filed Nov 10, 2025 21:42 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionRestricted Stock Units · Derivative 12,701 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051106 · wk-form4_1762810932.xml · derivative · entry 3

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,404

Underlying: Common Stock · 12,701 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:42 UTC
Arnette Stephen AChief Operating Officer
Tax withholdingCommon Stock 3,093 $21.79 $67,396.47
Disclosure

SEC source: 0001628280-25-051106 · wk-form4_1762810932.xml · nonDerivative · entry 2

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,628

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

Read SEC document
November 06, 2025 Filed Nov 10, 2025 21:42 UTC
Arnette Stephen AChief Operating Officer
Exercise / conversionCommon Stock 12,701 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051106 · wk-form4_1762810932.xml · nonDerivative · entry 1

Arnette Stephen A · CIK 0001919492 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,721

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.

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November 06, 2025 Filed Nov 10, 2025 21:45 UTC
Heller John E.Director · Chief Executive Officer
Exercise / conversionRestricted Stock Units · Derivative 39,617 $0.00 $0.00
Disclosure

SEC source: 0001628280-25-051115 · wk-form4_1762811119.xml · derivative · entry 3

Heller John E. · CIK 0001552715 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 79,236

Underlying: Common Stock · 39,617 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 November 6, 2025.

F4 · derivative.expiration_date: The restricted stock units awarded vested on November 6, 2025.

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November 06, 2025 Filed Nov 10, 2025 21:45 UTC
Heller John E.Director · Chief Executive Officer
Tax withholdingCommon Stock 17,868 $21.79 $389,343.72
Disclosure

SEC source: 0001628280-25-051115 · wk-form4_1762811119.xml · nonDerivative · entry 2

Heller John E. · CIK 0001552715 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 113,543

F2 · shares: Represents number of shares of AMTM common stock tendered for tax withholding upon vesting of restricted stock units.

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November 06, 2025 Filed Nov 10, 2025 21:45 UTC
Heller John E.Director · Chief Executive Officer
Exercise / conversionCommon Stock 39,617 Not disclosed Not disclosed
Disclosure

SEC source: 0001628280-25-051115 · wk-form4_1762811119.xml · nonDerivative · entry 1

Heller John E. · CIK 0001552715 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 131,411

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.

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May 08, 2025 Filed May 12, 2025 16:30 UTC
GOLDBERG ALAN EDirector · 10% owner
OtherCommon Stock 1,132,839 Not disclosed Not disclosed
Disclosure

SEC source: 0001641172-25-009708 · ownership.xml · nonDerivative · entry 1

GOLDBERG ALAN E · CIK 0001077430 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By LG Amentum Holdings LP

Disclosed balance after: 45,026,743

F1 · kind: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

F1 · price: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

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May 08, 2025 Filed May 12, 2025 09:07 UTC OtherCommon Stock 2,433,022 $0.00 $0.00
Disclosure

SEC source: 0000950157-25-000397 · form4.xml · nonDerivative · entry 1

Amentum Joint Venture GP LLC · CIK 0002037401 · Director

Amentum Joint Venture LP · CIK 0002037182 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Amentum Joint Venture LP

Disclosed balance after: 0

F1 · kind: This Form 4 is filed jointly by (i) Amentum Joint Venture GP LLC and (ii) Amentum Joint Venture LP ("Amentum JV"). Amentum Joint Venture GP LLC is the general partner of Amentum JV and may be deemed to have indirect voting and investment control over the shares held by Amentum JV. The shares of the Issuer reported as disposed in this Form 4 were owned directly by Amentum JV as a result of a Reverse Morris Trust transaction, with the Issuer surviving and being renamed Amentum Holdings, Inc., pursuant to the merger agreement and separation and distribution agreement, each dated as of November 20, 2023, among, in each case, Jacobs Solutions, Inc., the Issuer, Amentum Parent Holdings LLC and Amentum JV (as amended). The purpose of this Form 4 is to report that the Reporting Persons no longer beneficially own any shares of the Issuer.

F2 · price: On May 8, 2025, Amentum JV made pro rata distributions-in-kind of all of the shares of the Issuer held by Amentum JV to each of its limited partners in accordance with the limited partnership agreement of Amentum JV. As a result, Amentum JV no longer holds, and each of the Reporting Persons no longer beneficially owns, any shares of the Issuer.

F1 · balance_after: This Form 4 is filed jointly by (i) Amentum Joint Venture GP LLC and (ii) Amentum Joint Venture LP ("Amentum JV"). Amentum Joint Venture GP LLC is the general partner of Amentum JV and may be deemed to have indirect voting and investment control over the shares held by Amentum JV. The shares of the Issuer reported as disposed in this Form 4 were owned directly by Amentum JV as a result of a Reverse Morris Trust transaction, with the Issuer surviving and being renamed Amentum Holdings, Inc., pursuant to the merger agreement and separation and distribution agreement, each dated as of November 20, 2023, among, in each case, Jacobs Solutions, Inc., the Issuer, Amentum Parent Holdings LLC and Amentum JV (as amended). The purpose of this Form 4 is to report that the Reporting Persons no longer beneficially own any shares of the Issuer.

F1 · ownership.nature: This Form 4 is filed jointly by (i) Amentum Joint Venture GP LLC and (ii) Amentum Joint Venture LP ("Amentum JV"). Amentum Joint Venture GP LLC is the general partner of Amentum JV and may be deemed to have indirect voting and investment control over the shares held by Amentum JV. The shares of the Issuer reported as disposed in this Form 4 were owned directly by Amentum JV as a result of a Reverse Morris Trust transaction, with the Issuer surviving and being renamed Amentum Holdings, Inc., pursuant to the merger agreement and separation and distribution agreement, each dated as of November 20, 2023, among, in each case, Jacobs Solutions, Inc., the Issuer, Amentum Parent Holdings LLC and Amentum JV (as amended). The purpose of this Form 4 is to report that the Reporting Persons no longer beneficially own any shares of the Issuer.

F2 · ownership.nature: On May 8, 2025, Amentum JV made pro rata distributions-in-kind of all of the shares of the Issuer held by Amentum JV to each of its limited partners in accordance with the limited partnership agreement of Amentum JV. As a result, Amentum JV no longer holds, and each of the Reporting Persons no longer beneficially owns, any shares of the Issuer.

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May 08, 2025 Filed May 12, 2025 16:30 UTC OtherCommon Stock 1,132,839 Not disclosed Not disclosed
Disclosure

SEC source: 0001641172-25-009707 · ownership.xml · nonDerivative · entry 1

Goldberg 2014 LLC · CIK 0002037981 · 10% owner

Goldberg 2020 LLC · CIK 0002037424 · 10% owner

LG GP Holding IV LLC · CIK 0002038310 · 10% owner

LG GP Holding V LLC · CIK 0002037432 · 10% owner

Lindsay Goldberg GP IV LLC · CIK 0002037399 · 10% owner

Lindsay Goldberg GP V LLC · CIK 0002037542 · 10% owner

Lindsay Goldberg IV L.P. · CIK 0001605108 · 10% owner

Lindsay Goldberg IV - A L.P. · CIK 0001605152 · 10% owner

Lindsay Goldberg IV - PCF L.P. · CIK 0001605154 · 10% owner

Lindsay Goldberg Co-Inv. IV L.P. · CIK 0002037459 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 45,026,743

F1 · kind: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

F1 · price: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

F2 · ownership.nature: Mr. Goldberg is the Managing Member of Goldberg 2014 LLC and the Manager of Goldberg 2020 LLC. Goldberg 2014 LLC is the Active Member (and thereby, the manager) of LG GP Holding IV LLC, which is the managing member of Lindsay Goldberg GP IV LLC, which is the general partner of each of Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P., Lindsay Goldberg Co-Inv. IV L.P. and Lindsay Goldberg Employee Co-Inv. IV L.P (together, the "LG Fund IV Partnerships"). Goldberg 2020 LLC is the Manager of LG GP Holding V LLC, which is the managing member of Lindsay Goldberg GP V LLC, which is the general partner of each of Lindsay Goldberg V L.P. and Lindsay Goldberg Maverick Co-Inv. L.P. (together, the "LG Fund V Partnerships").

F3 · ownership.nature: Each of Lindsay Goldberg GP IV LLC and Lindsay Goldberg GP V LLC are the general partners of LG Co-Inv. A LP. Each of the LG Fund IV Partnerships, the LG Fund V Partnerships and LG Co-Inv. A LP are members of LG Amentum Holdings GP LLC, which is the general partner of LG Amentum Holdings LP. Each of the Reporting Persons other than LG Amentum Holdings LP may be deemed to share beneficial ownership of the Common Shares directly held by LG Amentum Holdings LP.

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May 08, 2025 Filed May 12, 2025 16:30 UTC OtherCommon Stock 1,132,839 Not disclosed Not disclosed
Disclosure

SEC source: 0001641172-25-009710 · ownership.xml · nonDerivative · entry 1

Lindsay Goldberg Employee Co-Inv. IV L.P. · CIK 0002037350 · 10% owner

LG Co-Inv. A L.P. · CIK 0002037394 · 10% owner

Lindsay Goldberg V L.P. · CIK 0001743020 · 10% owner

Lindsay Goldberg Maverick Co-Inv. L.P. · CIK 0002037408 · 10% owner

LG Amentum Holdings GP LLC · CIK 0002037417 · 10% owner

LG Amentum Holdings LP · CIK 0002037445 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 45,026,743

F1 · kind: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

F1 · price: Represents securities received in a pro-rata distribution in-kind by Amentum Joint Venture LP to its partners for no consideration.

F2 · ownership.nature: Mr. Goldberg is the Managing Member of Goldberg 2014 LLC and the Manager of Goldberg 2020 LLC. Goldberg 2014 LLC is the Active Member (and thereby, the manager) of LG GP Holding IV LLC, which is the managing member of Lindsay Goldberg GP IV LLC, which is the general partner of each of Lindsay Goldberg IV L.P., Lindsay Goldberg IV - A L.P., Lindsay Goldberg IV - PCF L.P., Lindsay Goldberg Co-Inv. IV L.P. and Lindsay Goldberg Employee Co-Inv. IV L.P (together, the "LG Fund IV Partnerships"). Goldberg 2020 LLC is the Manager of LG GP Holding V LLC, which is the managing member of Lindsay Goldberg GP V LLC, which is the general partner of each of Lindsay Goldberg V L.P. and Lindsay Goldberg Maverick Co-Inv. L.P. (together, the "LG Fund V Partnerships").

F3 · ownership.nature: Each of Lindsay Goldberg GP IV LLC and Lindsay Goldberg GP V LLC are the general partners of LG Co-Inv. A LP. Each of the LG Fund IV Partnerships, the LG Fund V Partnerships and LG Co-Inv. A LP are members of LG Amentum Holdings GP LLC, which is the general partner of LG Amentum Holdings LP. Each of the Reporting Persons other than LG Amentum Holdings LP may be deemed to share beneficial ownership of the Common Shares directly held by LG Amentum Holdings LP.

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April 08, 2025 Filed Apr 10, 2025 20:41 UTC GrantRestricted Stock Units · Derivative 11,564 $0.00 $0.00
Disclosure

SEC source: 0002011286-25-000117 · wk-form4_1744317662.xml · derivative · entry 1

Vollmer John C. · CIK 0001723342 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,564

Underlying: Common Stock · 11,564 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: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

F2 · derivative.expiration_date: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

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April 08, 2025 Filed Apr 10, 2025 20:40 UTC GrantRestricted Stock Units · Derivative 11,564 $0.00 $0.00
Disclosure

SEC source: 0002011286-25-000116 · wk-form4_1744317652.xml · derivative · entry 1

Brooks Vincent K · CIK 0001809046 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,564

Underlying: Common Stock · 11,564 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: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

F2 · derivative.expiration_date: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

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April 08, 2025 Filed Apr 10, 2025 20:40 UTC GrantRestricted Stock Units · Derivative 11,564 $0.00 $0.00
Disclosure

SEC source: 0002011286-25-000115 · wk-form4_1744317641.xml · derivative · entry 1

EBERHART RALPH E · CIK 0001409312 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,564

Underlying: Common Stock · 11,564 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: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

F2 · derivative.expiration_date: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

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April 08, 2025 Filed Apr 10, 2025 20:40 UTC GrantRestricted Stock Units · Derivative 11,564 $0.00 $0.00
Disclosure

SEC source: 0002011286-25-000114 · wk-form4_1744317632.xml · derivative · entry 1

Loughran Barbara · CIK 0001778333 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,564

Underlying: Common Stock · 11,564 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: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

F2 · derivative.expiration_date: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

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April 08, 2025 Filed Apr 10, 2025 20:40 UTC GrantRestricted Stock Units · Derivative 11,564 $0.00 $0.00
Disclosure

SEC source: 0002011286-25-000113 · wk-form4_1744317621.xml · derivative · entry 1

IRELAND SUSAN LESLIE · CIK 0001718953 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,564

Underlying: Common Stock · 11,564 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: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

F2 · derivative.expiration_date: The restricted stock units shall vest on the date of the next annual meeting of stockholders of the Issuer.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.