The following statement is being issued by Robbins Geller Rudman & Dowd LLP and Grant & Eisenhofer P.A. regarding the Mercury Securities Litigation:

UNITED STATES DISTRICT COURT

DISTRICT OF MASSACHUSETTS

TO: ALL PURCHASERS AND ACQUIRERS OF MERCURY SYSTEMS, INC. (“MERCURY”) COMMON STOCK BETWEEN FEBRUARY 3, 2021 AND FEBRUARY 6, 2024, INCLUSIVE (“CLASS” OR “CLASS MEMBERS”)

THIS NOTICE WAS AUTHORIZED BY THE COURT. IT IS NOT A LAWYER SOLICITATION. PLEASE READ THIS NOTICE CAREFULLY AND IN ITS ENTIRETY.

YOU ARE HEREBY NOTIFIED that a hearing will be held on May 12, 2026, at 2:00 p.m., before the Honorable William G. Young, at the United States District Court, District of Massachusetts, John Joseph Moakley U.S. Courthouse, Courtroom 18, 1 Courthouse Way, Boston, MA 02210, to determine whether: (1) the proposed settlement (the “Settlement”) of the above-captioned Litigation as set forth in the Stipulation of Settlement (“Stipulation”) for $32.5 million in cash should be approved by the Court as fair, reasonable, and adequate; (2) the Judgment as provided under the Stipulation should be entered dismissing the Litigation with prejudice; (3) to award Lead Counsel attorneys’ fees and expenses out of the Settlement Fund (as defined in the Notice of Pendency and Proposed Settlement of Class Action (“Notice”), which is discussed below) and, if so, in what amounts; (4) to award Plaintiffs pursuant to 15 U.S.C. §78u-4(a)(4) in relation to their representation of the Class out of the Settlement Fund and, if so, in what amount; and (5) the Plan of Allocation should be approved by the Court as fair, reasonable, and adequate.

It is possible that the Court may decide to change the date and/or time of the Settlement Hearing, conduct the Settlement Hearing by video or telephonic conference, or otherwise allow Class Members to appear at the hearing by telephone or videoconference, without further written notice to the Class. To determine whether the date and time of the Settlement Hearing have changed, or whether Class Members must or may participate by telephone or video, it is important that you monitor the Court’s docket and the website, www.MercurySecuritiesSettlement.com, for any update before making any plans to attend the Settlement Hearing.

IF YOU PURCHASED OR ACQUIRED MERCURY COMMON STOCK BETWEEN FEBRUARY 3, 2021 AND FEBRUARY 6, 2024, INCLUSIVE, YOUR RIGHTS MAY BE AFFECTED BY THE SETTLEMENT OF THIS LITIGATION.

To share in the distribution of the Net Settlement Fund, you must establish your rights by submitting a Proof of Claim and Release form (“Proof of Claim”) by mail (postmarked no later than April 8, 2026) or electronically via the website (no later than April 8, 2026). Failure to submit your Proof of Claim by April 8, 2026, will subject your claim to rejection and preclude you from receiving any of the recovery in connection with the Settlement of this Litigation. If you purchased or acquired Mercury common stock during the period between February 3, 2021 and February 6, 2024, inclusive, and do not request exclusion from the Class, you will be bound by the Settlement and any judgment and release entered in the Litigation, including, but not limited to, the Judgment, whether or not you submit a Proof of Claim.

The Notice, which more completely describes the Settlement and your rights thereunder (including your right to object to the Settlement), the Proof of Claim, the Stipulation (which, among other things, contains definitions for the defined terms used in this Summary Notice), and other important documents, may be accessed online at www.MercurySecuritiesSettlement.com, or by writing to or calling:

Mercury Securities Settlement

Claims Administrator

c/o Verita Global

P.O. Box 301171

Los Angeles, CA 90030-1171

1-888-808-8981

Inquiries should NOT be directed to Defendants, the Court, or the Clerk of the Court.

Inquiries, other than requests for the Notice or for a Proof of Claim, may be made to Lead Counsel:

ROBBINS GELLER RUDMAN & DOWD LLP

Ashley Price

655 West Broadway, Suite 1900

San Diego, CA 92101

Telephone: 1-800-449-4900

settlementinfo@rgrdlaw.com

IF YOU DESIRE TO BE EXCLUDED FROM THE CLASS, YOU MUST SUBMIT A REQUEST FOR EXCLUSION SUCH THAT IT IS POSTMARKED BY APRIL 21, 2026, IN THE MANNER AND FORM EXPLAINED IN THE NOTICE. ALL CLASS MEMBERS WILL BE BOUND BY THE SETTLEMENT EVEN IF THEY DO NOT SUBMIT A TIMELY PROOF OF CLAIM.

IF YOU ARE A CLASS MEMBER, YOU HAVE THE RIGHT TO OBJECT TO THE SETTLEMENT, THE PLAN OF ALLOCATION, THE REQUEST BY LEAD COUNSEL FOR AN AWARD OF ATTORNEYS’ FEES, AND/OR THE REQUEST FOR AWARD(S) TO PLAINTIFFS IN CONNECTION WITH THEIR REPRESENTATION OF THE CLASS. ANY OBJECTIONS MUST BE FILED WITH THE COURT AND SENT TO LEAD COUNSEL AND DEFENDANTS’ COUNSEL BY APRIL 21, 2026, IN THE MANNER AND FORM EXPLAINED IN THE NOTICE AVAILABLE AT WWW.MERCURYSECURITIESSETTLEMENT.COM.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260115209684/en/