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CIK 0002011286 · Large accelerated filer

Amentum Holdings, Inc.

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Ticker
AMTM
Exchange
NYSE
Industry
Services-Business Services, NEC
FY end
Oct 2
Incorporated
DE
Entity type
operating
EIN
990622272
Phone
7035790410
Business address
4800 WESTFIELDS BOULEVARD, SUITE 400, CHANTILLY, VA, 20151
Former names
Amazon Holdco Inc.
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$0
in 0 filings

Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Date Insider Transaction Shares Price Value Owned after
2026-11-06 Bruning Jill L Chief Technology Officer Option exercise +4,839 203,222
2026-11-06 Bruning Jill L Chief Technology Officer Shares withheld for taxes −1,457 $21.25 $31K 201,765
2026-11-06 Bruning Jill L Chief Technology Officer Option exercise · Restricted Stock Units −4,839 4,839
2026-11-06 Mullen Sean Thomas Chief Growth Officer Option exercise +4,839 37,287
2026-11-06 Mullen Sean Thomas Chief Growth Officer Shares withheld for taxes −2,183 $21.25 $46K 35,104
2026-11-06 Mullen Sean Thomas Chief Growth Officer Option exercise · Restricted Stock Units −4,839 4,839
2026-11-06 Arnette Stephen A Chief Operating Officer Option exercise +12,702 119,354
2026-11-06 Arnette Stephen A Chief Operating Officer Shares withheld for taxes −4,999 $21.25 $106K 114,355
2026-11-06 Arnette Stephen A Chief Operating Officer Option exercise · Restricted Stock Units −12,702 12,702
2026-11-06 Johnson Travis Barton Chief Financial Officer Option exercise +12,097 130,284
2026-11-06 Johnson Travis Barton Chief Financial Officer Shares withheld for taxes −5,064 $21.25 $108K 125,220
2026-11-06 Johnson Travis Barton Chief Financial Officer Option exercise · Restricted Stock Units −12,097 12,097
2026-11-06 Heller John E. Chief Executive Officer Option exercise +39,618 415,637
2026-11-06 Heller John E. Chief Executive Officer Shares withheld for taxes −17,868 $21.25 $380K 397,769
2026-11-06 Heller John E. Chief Executive Officer Option exercise · Restricted Stock Units −39,618 39,618
2026-08-14 Thompson Christopher M.T. Director Gift −4,250 5,750
2026-05-06 Heller John E. Chief Executive Officer Option exercise +18,145 384,203
2026-05-06 Heller John E. Chief Executive Officer Shares withheld for taxes −8,184 $24.89 $204K 376,019
2026-05-06 Heller John E. Chief Executive Officer Option exercise · Restricted Stock Units −18,145 18,146
2026-05-06 Mullen Sean Thomas Chief Growth Officer Option exercise +9,072 35,210

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