William L. Ballhaus - 18 Aug 2025 Form 4 Insider Report for MERCURY SYSTEMS INC (MRCY)

Role: Chairman, President & CEO, Director
Signature: /s/ Douglas Munro, attorney-in-fact
Issuer symbol: MRCY
Transactions as of: 18 Aug 2025
Net transactions value: -$1,532,692
Form type: 4
Filing time: 20 Aug 2025, 17:11:36 UTC
Previous filing: 19 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Ballhaus William L	Chairman, President & CEO, Director	50 MINUTEMAN ROAD, ANDOVER	/s/ Douglas Munro, attorney-in-fact	20 Aug 2025	0001436044

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRCY	Common Stock	Sale	$691,437	-10,395	-2.6%	$66.52	388,026	18 Aug 2025	Direct	F1, F2
transaction	MRCY	Common Stock	Sale	$841,255	-13,050	-3.4%	$64.46	374,976	19 Aug 2025	Direct	F1, F2
holding	MRCY	Common Stock						1,156	18 Aug 2025	401K Plan
holding	MRCY	Common Stock						7,066	18 Aug 2025	By Milestone Road Holdings, LLC

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

Explanation of Responses:

Id	Content
F1	Represents shares sold as part of a sell-to-cover program to satisfy tax withholding obligations upon the vesting of stock awards.
F2	Represents the per share price attributed to sales of shares on behalf of all participants under the sell-to-cover program on the transaction date indicated.