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Insider Trading

Michele St. Mary - Insider Trading & Ownership

Location: C/O Amentum, 4800 Westfields Blvd, Ste. 400, Chantilly, VA
Summary: The estimated net worth of Michele St. Mary is at least $876K dollars as of November 19, 2025. Michele St. Mary is the Chief Legal Officer & GC of Amentum Holdings, Inc. and owns shares of Amentum Holdings, Inc. (AMTM) stock worth about $876K.
Signature: /s/ Mark Esposito, Attorney-in-Fact
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Ownership of Michele St. Mary

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
AMTM	Amentum Holdings, Inc.	Chief Legal Officer & GC	$876K			Nov 17, 2025

Insider Transactions Reported by Michele St. Mary:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.