Douglas Munro - 17 Feb 2026 Form 4 Insider Report for MERCURY SYSTEMS INC (MRCY)

Role: SVP, CAO
Signature: /s/ Douglas Munro
Issuer symbol: MRCY
Transactions as of: 17 Feb 2026
Net transactions value: -$48,629
Form type: 4
Filing time: 19 Feb 2026, 16:37:52 UTC
Previous filing: 13 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Munro Douglas	SVP, CAO	50 MINUTEMAN ROAD, ANDOVER	/s/ Douglas Munro	19 Feb 2026	0002011703

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRCY	Common Stock	Sale	$48,629	-582	-3.9%	$83.56	14,328	17 Feb 2026	Direct	F1, F2
holding	MRCY	Common Stock						248	17 Feb 2026	401K Plan

* 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.