JANA Partners Management, LP - May 8, 2025 Form 4 Insider Report for MERCURY SYSTEMS INC (MRCY)

Role: Director, Other*, 10%+ Owner
Signature: /s/ JANA Partners Management, LP, by Jennifer Fanjiang, Partner, Chief Legal Officer and Chief Compliance Officer
Stock symbol: MRCY
Transactions as of: May 8, 2025
Transactions value $: -$8,665,793
Form type: 4
Date filed: 5/9/2025, 09:00 PM
Previous filing: Apr 28, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
JANA Partners Management, LP	Director, Other*, 10%+ Owner	888 SEVENTH AVENUE, 24TH FLOOR, NEW YORK	/s/ JANA Partners Management, LP, by Jennifer Fanjiang, Partner, Chief Legal Officer and Chief Compliance Officer	2025-05-09	0001998597

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRCY	Common Stock	Sale	-$4.08M	-88.2K	-1.27%	$46.27	6.86M	May 8, 2025	See footnote	F1, F2
transaction	MRCY	Common Stock	Sale	-$4.59M	-100K	-1.46%	$45.87	6.76M	May 9, 2025	See footnote	F1, F2

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

Explanation of Responses:

Id	Content
F1	The transaction reported herein was effected to rebalance the holdings of the JANA Funds (as defined below).
F2	JANA Partners Management, LP ("JANA" or the "Reporting Person") is a private money management firm which beneficially owns the securities reported herein through various accounts under its management and control (the "JANA Funds"). JANA Partners Management GP, LLC (the "GP") is the general partner of JANA. Barry Rosenstein is the Founder of the GP and JANA. JANA, the GP and Barry Rosenstein disclaim any beneficial ownership of any of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any.

Content

The transaction reported herein was effected to rebalance the holdings of the JANA Funds (as defined below).

JANA Partners Management, LP ("JANA" or the "Reporting Person") is a private money management firm which beneficially owns the securities reported herein through various accounts under its management and control (the "JANA Funds"). JANA Partners Management GP, LLC (the "GP") is the general partner of JANA. Barry Rosenstein is the Founder of the GP and JANA. JANA, the GP and Barry Rosenstein disclaim any beneficial ownership of any of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any.

Remarks:

The Reporting Person may be deemed to be a director by deputization for purposes of Section 16 under the Securities Exchange Act of 1934 by virtue of the fact that Scott Ostfeld, a Partner of the Reporting Person, currently serves on the board of directors of the Issuer.