Jana Partners Llc - Jul 10, 2023 Form 3 Insider Report for MERCURY SYSTEMS INC (MRCY)

Role: Director, Other*
Signature: s/ JANA Partners LLC, by Jennifer Fanjiang, Partner, Chief Legal Officer and Chief Compliance Officer
Stock symbol: MRCY
Transactions as of: Jul 10, 2023
Transactions value $: $0
Form type: 3
Date filed: 7/11/2023, 04:20 PM
Previous filing: Jun 9, 2023
Next filing: Aug 10, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	MRCY	Common Stock, par value $0.01 per share						4.66M	Jul 10, 2023	See footnote	F1

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

Explanation of Responses:

Id	Content
F1	JANA Partners LLC ("JANA") is a private money management firm which beneficially owns the securities reported herein through various accounts under its management and control. The principal owner of JANA is Barry Rosenstein. JANA and Barry Rosenstein each disclaim beneficial ownership of the Issuer's securities reported herein in excess of his actual pecuniary interest therein, if any.

Remarks:

JANA 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 JANA, currently serves on the board of directors of the Issuer.