MRCY / Mercury Systems, Inc. - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

Mercury Systems, Inc.
US ˙ NasdaqGS ˙ US5893781089

Statistik Asas
LEI 549300P3B84SGK7HH679
CIK 1049521
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Mercury Systems, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan senarai kronologi lengkap bagi Pemfailan SEC, tidak termasuk pemfailan pemilikan yang kami sediakan di tempat lain.
August 11, 2025 EX-10.13

Restricted Stock Unit Agreement, dated April 15, 2025, between the Company and David E. Farnsworth

rsuagreementdavidfarnswo RESTRICTED STOCK UNIT AGREEMENT UNDER THE MERCURY SYSTEMS, INC.

August 11, 2025 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | X: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Fourth Quarter and Fiscal 2025 Results •Record Q4 FY25 Bookings of $341.5 million; book-to-bill of 1.25 •Record backlog of $1.40 billion; up 6% year-over-year •Q4 FY25 Revenue of $273.1 million; GAAP net income of $16.4 million; and adjusted EBITDA of $51.3 million •Q4 FY25 Operating Cash Flow of $38.1 million with Free Cash Flow of $34.0

August 11, 2025 EX-21.1

Subsidiaries of the Company

exhibit211 EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION OF ORGANIZATION Mercury Mission Systems, LLC Delaware Mercury Computer Systems Limited United Kingdom Mercury Mission Systems Canada, Inc. Canada Mercury Mission Systems International Holding, SA Switzerland Mercury Mission Systems International, SA Switzerland Mercury Mission Systems Spain, SL Spain

August 11, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 11, 2025 Mercury Systems, In

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 11, 2025 Mercury Systems, Inc.

August 11, 2025 EX-99.2

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET AUGUST 11, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO August 11, 2025, 5:00 pm ET FOURTH QUARTER AND FI

q4fy25earningspresentati © Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET AUGUST 11, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO August 11, 2025, 5:00 pm ET FOURTH QUARTER AND FISCAL YEAR 2025 FINANCIAL RESULTS 1 © Mercury Systems, Inc. /Mercury Proprietary/No Tech Data/ Forward-looking safe harbor sta

August 11, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED June 27, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO . COMMISSION FILE NUMBER 001-41194 MERCURY SYSTEMS, INC. (Exact

May 30, 2025 EX-1.01

Exhibit 1.01 – Mercury Systems, Inc. Conflict Minerals Report for the Year Ended December 31, 2024

Exhibit 1.01 Mercury Systems, Inc. Conflict Minerals Report For the Year Ended December 31, 2024 This conflict minerals report for the year ended December 31, 2024, is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended. This report has been prepared based on Rule 13p-1 as further clarified by the Securities and Exchange Commission (“SEC”) guidance issued on A

May 30, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc.

May 6, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 6, 2025 Mercury Systems, Inc.

May 6, 2025 EX-99.2

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET MAY 6, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO May 6, 2025, 5:00 pm ET THIRD QUARTER FISCAL YEAR 202

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET MAY 6, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO May 6, 2025, 5:00 pm ET THIRD QUARTER FISCAL YEAR 2025 FINANCIAL RESULTS 1 © Mercury Systems, Inc. /Mercury Proprietary/No Tech Data/ Forward-looking safe harbor statement This presentation contains cert

May 6, 2025 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Third Quarter Fiscal 2025 Results •Q3 FY25 Bookings of $200.4 million; trailing-twelve-month book-to-bill of 1.1 •Backlog of $1.34 billion; up 4% year-over-year •Q3 FY25 Revenue of $211.4 million; GAAP net loss of $19.2 million; and adjusted EBITDA of $24.7 million •Operating Cash Flow of $30.0 million with Free Cash Flow of $24.1 million

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 28, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 001-41194 MERCURY SYSTEMS, INC

April 1, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): March 28, 2025 Mercury Systems, Inc.

February 4, 2025 8-K

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 29, 2025 Mercury Systems, Inc.

February 4, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 27, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 001-41194 MERCURY SYSTEMS,

February 4, 2025 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Second Quarter Fiscal 2025 Results •Q2 FY25 Bookings of $242.4 million; book-to-bill ratio of 1.09 •Record backlog of $1.4 billion; up 6% year-over-year •Q2 FY25 Revenue of $223.1 million; GAAP net loss of $17.6 million; and adjusted EBITDA of $22.0 million •Record Operating Cash Flow of $85.5 million with Free Cash Flow of $81.9 million A

February 4, 2025 EX-99.2

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET FEBRUARY 4, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO February 4, 2025, 5:00 pm ET SECOND QUARTER FISC

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET FEBRUARY 4, 2025 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO February 4, 2025, 5:00 pm ET SECOND QUARTER FISCAL YEAR 2025 FINANCIAL RESULTS 1 © Mercury Systems, Inc. /Mercury Proprietary/No Tech Data/ Forward-looking safe harbor statement This presentation co

January 6, 2025 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 6, 2025 Mercury Systems, Inc.

January 6, 2025 EX-99.1

Mercury Systems Announces Board of Directors Update Roger Krone, former Chairman and CEO of Leidos, departs Board to focus on Boy Scouts of America Jean Bua, CFO of NetScout Systems, appointed to Board ANDOVER, Mass. – January 6, 2025 – Mercury Syste

Mercury Systems Announces Board of Directors Update Roger Krone, former Chairman and CEO of Leidos, departs Board to focus on Boy Scouts of America Jean Bua, CFO of NetScout Systems, appointed to Board ANDOVER, Mass.

November 14, 2024 SC 13G/A

MRCY / Mercury Systems, Inc. / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm2428293d1sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 5)* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP

November 5, 2024 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports First Quarter Fiscal 2025 Results •Q1 FY25 Bookings of $247.7 million; book-to-bill ratio of 1.21 •Q1 FY25 Revenue of $204.4 million; GAAP net loss of $17.5 million; and adjusted EBITDA of $21.5 million •Record backlog of $1.3 billion; up 16% year-over-year ANDOVER, Mass. November 5, 2024 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com),

November 5, 2024 EX-10.7

First Amendment to Restricted Stock Award Agreement Granted to Allen Couture on October 17, 2022

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO RESTRICTED STOCK AWARD AGREEMENT GRANTED TO ALLEN COUTURE UNDER THE MERCURY SYSTEMS, INC.

November 5, 2024 EX-10.5

First Amendment to Performance Restricted Stock Award Agreement Granted to Christopher C. Cambria on August 17, 2023

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO PERFORMANCE RESTRICTED STOCK AWARD AGREEMENT GRANTED TO CHRISTOPHER CAMBRIA UNDER THE MERCURY SYSTEMS, INC.

November 5, 2024 EX-10.8

First Amendment to Performance Restricted Stock Award Agreement Granted to Allen Couture on October 17, 2022

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO PERFORMANCE RESTRICTED STOCK AWARD AGREEMENT GRANTED TO ALLEN COUTURE UNDER THE MERCURY SYSTEMS, INC.

November 5, 2024 EX-10.6

Separation Agreement, dated February 15, 2024, between the Company and Allen Couture

50 Minuteman Road • Andover, MA 01810 • 866.627.6951 • mrcy.com Does not contain Technical Data. //Private and Restricted/No Tech Data// Separation Agreement and General Release January 12, 2024 Revised February 15, 2024 Mercury Systems, Inc. and its subsidiaries (the “Company”) has notified the employee listed in the table below (“you” or the “Employee”) that your employment will end on the Separ

November 5, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 27, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 001-41194 MERCURY SYSTEMS,

November 5, 2024 EX-10.3

First Amendment to Performance Restricted Stock Award Agreement Granted to Christopher C. Cambria on August 16, 2021 and February 15, 2022

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO PERFORMANCE RESTRICTED STOCK AWARD AGREEMENT GRANTED TO CHRISTOPHER CAMBRIA UNDER THE MERCURY SYSTEMS, INC.

November 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 5, 2024 Mercury Systems, Inc.

November 5, 2024 EX-10.1

Separation Agreement, dated January 25, 2024, between the Company and Christopher C. Cambria

November 5, 2024 EX-99.2

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET NOVEMBER 5, 2024 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO November 5, 2024, 5:00 pm ET FIRST QUARTER FISCA

© Mercury Systems, Inc. WEBCAST LOGIN AT WWW.MRCY.COM/INVESTOR WEBCAST REPLAY AVAILABLE BY 7:00 P.M. ET NOVEMBER 5, 2024 Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO November 5, 2024, 5:00 pm ET FIRST QUARTER FISCAL YEAR 2025 FINANCIAL RESULTS 1 © Mercury Systems, Inc. /Mercury Proprietary/No Tech Data/ Forward-looking safe harbor statement This presentation con

November 5, 2024 EX-10.2

First Amendment to Restricted Stock Award Agreements Granted to Christopher C. Cambria on August 16, 2021 and February 15, 2022

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO RESTRICTED STOCK AWARD AGREEMENTS GRANTED TO CHRISTOPHER CAMBRIA UNDER THE MERCURY SYSTEMS, INC.

November 5, 2024 EX-10.4

First Amendment to Restricted Stock Award Agreement Granted to Christopher C. Cambria on August 17, 2023

/Mercury Proprietary/No Tech Data/ FIRST AMENDMENT TO RESTRICTED STOCK AWARD AGREEMENT GRANTED TO CHRISTOPHER CAMBRIA UNDER THE MERCURY SYSTEMS, INC.

October 28, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 23, 2024 Mercury Systems, Inc.

September 12, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy State

August 13, 2024 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Fourth Quarter and Fiscal 2024 Results •Q4 FY24 Bookings of $284.4 million; book-to-bill ratio of 1.14 •Q4 FY24 Revenue of $248.6 million; GAAP net loss and adjusted EBITDA ($10.8) million and $31.2 million, respectively •Record backlog of $1.3 billion; up 16% year-over-year ANDOVER, Mass. August 13, 2024 Mercury Systems, Inc. (NASDAQ: MRC

August 13, 2024 EX-97.1

Compensation Recoupment Policy

1 Mercury Systems, Inc. Amended and Restated Compensation Recoupment Policy ARTICLE A. PURPOSE AND GENERAL TERMS Section A-1. Purpose. Mercury Systems, Inc. (the “Company”) has adopted this Amended and Restated Compensation Recoupment Policy (this “Policy”) to: (a) implement a mandatory clawback policy in the event of a Restatement in compliance with the Applicable Rules, which is set forth in Art

August 13, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 13, 2024 Mercury Systems, Inc.

August 13, 2024 EX-99.2

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO August 13, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO August 13, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET August 13, 2024 © Mercury Systems, Inc.2 Does not contain Technical Data. //Mercury Proprietary/No Tech Data///Mercury Proprietary/No

August 13, 2024 EX-21.1

Subsidiaries of the Company

EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION OF ORGANIZATION Mercury Mission Systems, LLC Delaware Mercury Computer Systems Limited United Kingdom Mercury Mission Systems Canada, Inc. Canada Mercury Mission Systems International Holding, SA Switzerland Mercury Mission Systems International, SA Switzerland Mercury Mission Systems Spain, SL Spain Mercury Systems SARL France

August 13, 2024 EX-10.3

2018 Stock Incentive Plan, as amended and restated

MERCURY SYSTEMS, INC. AMENDED AND RESTATED 2018 STOCK INCENTIVE PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Mercury Systems, Inc. 2018 Stock Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non- Employee Directors and other key persons (including consultants and qualified individuals who have received

August 13, 2024 EX-10.1

Amendment No. 6 to Credit Agreement, dated August 13, 2024, among the Company, the Guarantors party thereto, the Lenders party thereto and Bank of America, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 of the Company’s current report on Form 8-K filed August 13, 2024)

EXECUTION VERSION 13723822v8 AMENDMENT NO. 6 This AMENDMENT NO. 6 dated as of August 12, 2024 (this “Amendment”), is entered into among MERCURY SYSTEMS, INC., a Massachusetts corporation (the “Borrower”), certain subsidiaries of the Borrower, as Guarantors, the Lenders party hereto, and BANK OF AMERICA, N.A., in its capacity as administrative agent for the Lenders (in such capacity, the “Administr

August 13, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED June 28, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO . COMMISSION FILE NUMBER 001-41194 MERCURY SYSTEMS, INC. (Exact

August 13, 2024 EX-10.6

Compensation Policy for Non-Employee Directors

1.1 1 Does not contain Technical Data. //Mercury Proprietary/No Tech Data// MERCURY SYSTEMS, INC. Compensation Policy for Non-Employee Directors Cash Compensation Annual retainer for non-employee directors: $65,000 per annum, paid quarterly Additional annual retainers (all per annuum, paid quarterly): Independent Chair: $45,000 Lead Independent Director: $35,000 Chair of the Audit Committee: $25,0

August 13, 2024 EX-19.1

Insider Trading Policy

1 | P a g e COR-P04-05 Mercury Systems, Inc. Company Policy Effective Date: May 1, 2024 COR-P04-05 Approver: Stuart H. Kupinsky Securities Trades by Company Personnel Authorized By: EVP, Chief Legal Officer The Need For A Policy Statement. This Statement sets forth the policy of Mercury Systems, Inc. and its subsidiaries (collectively, “Mercury”) regarding insider trading and the disclosure of inf

June 18, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 17, 2024 Mercury Systems, Inc.

June 18, 2024 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 USA | +1 (978) 256-1300 | www.mrcy.com | twitter: @MRCY //// Mercury Appoints Senior Vice President of Operations, Completes Second Phase of Organizational Restructuring ANDOVER, Mass. – June 18, 2024 –

50 Minuteman Road, Andover, Massachusetts 01810 USA | +1 (978) 256-1300 | www.mrcy.com | twitter: @MRCY //// Mercury Appoints Senior Vice President of Operations, Completes Second Phase of Organizational Restructuring ANDOVER, Mass. – June 18, 2024 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers mission-critical processing power to the edge, today announced

May 30, 2024 EX-1.01

Exhibit 1.01 – Mercury Systems, Inc. Conflict Minerals Report for the Year Ended December 31, 2023

1 Exhibit 1.01 Mercury Systems, Inc. Conflict Minerals Report For the Year Ended December 31, 2023 This conflict minerals report for the year ended December 31, 2023, is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended. This report has been prepared based on Rule 13p-1 as further clarified by the Securities and Exchange Commission (“SEC”) guidance issued on

May 30, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc.

May 8, 2024 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 (Form Type) Mercury Systems, Inc.

May 8, 2024 EX-99.1

2024 Employee Stock Purchase Plan (incorporated herein by reference to Exhibit 10.1 of the Company’s Registration Statement on Form S-8 filed May 8, 2024)

MERCURY SYSTEMS, INC. 2024 EMPLOYEE STOCK PURCHASE PLAN 1. PURPOSE. It is the purpose of this 2024 Employee Stock Purchase Plan (the “Plan”) to provide a means whereby Eligible Employees (as defined below) may purchase Common Stock (as defined below) of Mercury Systems, Inc. (the “Company”) through after-tax payroll deductions. It is intended to provide a further incentive for Eligible Employees t

May 8, 2024 S-8

As filed with the Securities and Exchange Commission on May 8, 2024

As filed with the Securities and Exchange Commission on May 8, 2024 Registration No.

May 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 29, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 001-41194 MERCURY SYSTEMS, INC

May 7, 2024 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Third Quarter Fiscal 2024 Results •Q3 FY24 Bookings of $219.9 million; book-to-bill ratio of 1.06 •Q3 FY24 Revenue of $208.3 million; GAAP net loss and adjusted EBITDA ($44.6) million and ($2.4) million, respectively •Record backlog of $1.3 billion; up 17% year-over-year ANDOVER, Mass. May 7, 2024 Mercury Systems, Inc. (NASDAQ: MRCY, www.m

May 7, 2024 EX-10.1

Separation Agreement, dated January 12, 2024, between the Company and Christine F. Harbison

50 Minuteman Road • Andover, MA 01810 • 866.627.6951 • mrcy.com Does not contain Technical Data. //Private and Restricted/No Tech Data// Separation Agreement and General Release January 12, 2024 Mercury Systems, Inc. and its subsidiaries (the “Company”) has notified the employee listed in the table below (“you” or the “Employee”) that your employment will end on the Separation Date listed in the t

May 7, 2024 EX-99.2

© Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO May 7, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00

© Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO May 7, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET May 7, 2024 © Mercury Systems, Inc.2 Does not contain Technical Data. //Mercury Proprietary/No Tech Data// Forward-looking safe harbor stateme

May 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 7, 2024 Mercury Systems, Inc.

May 7, 2024 EX-10.2

(incorporated by reference to Exhibit 10.2 of the Company’s quarterly report for the fiscal quarter ended

May 7, 2024 EX-10.3

First Amendment to Restricted Stock Award Agreement Granted to Christine Harbison under the Company’s 2018 Stock Incentive Plan (incorporated herein by reference to Exhibit 10.3 of the Company’s quarterly report for the fiscal quarter ended March 29, 2024)

FIRST AMENDMENT TO RESTRICTED STOCK AWARD AGREEMENT GRANTED TO CHRISTINE HARBISON UNDER THE MERCURY SYSTEMS, INC.

May 7, 2024 EX-10.4

First Amendment to Performance Restricted Stock Award Agreement Granted to Christine Harbison under the Company’s 2018 Stock Incentive Plan (incorporated herein by reference to Exhibit 10.4 of the Company’s quarterly report for the fiscal quarter ended March 29, 2024)

FIRST AMENDMENT TO PERFORMANCE RESTRICTED STOCK AWARD AGREEMENT GRANTED TO CHRISTINE HARBISON UNDER THE MERCURY SYSTEMS, INC.

February 14, 2024 CORRESP

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY February 14, 2024 Via EDGAR Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 A

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY February 14, 2024 Via EDGAR Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Claire Erlanger Office of Manufacturing Re: Mercury Systems, Inc. Form 10-K for the Year Ended June 30, 2023 Filed August 15, 2023 File No.

February 13, 2024 SC 13D/A

MRCY / Mercury Systems, Inc. / JANA Partners Management, LP - MERCURY SYSTEMS, INC. Activist Investment

SC 13D/A 1 p24-0855sc13da.htm MERCURY SYSTEMS, INC. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 1) Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title o

February 13, 2024 SC 13G/A

MRCY / Mercury Systems, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 14)* Name of issuer: Mercury Systems Inc Title of Class of Securities: Common Stock CUSIP Number: 589378108 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 12, 2024 SC 13G/A

MRCY / Mercury Systems, Inc. / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm245766d3sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 4)* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP

February 8, 2024 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 7, 2024 Mercury Systems, Inc.

February 8, 2024 EX-99.1

Press Release Mercury Announces Appointment of Douglas Munro as Vice President and Chief Accounting Officer ANDOVER, Mass. – Feb. 8, 2024 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers mission-critical proces

Press Release Mercury Announces Appointment of Douglas Munro as Vice President and Chief Accounting Officer ANDOVER, Mass.

February 6, 2024 EX-99.2

© Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO February 6, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by

© Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus Chairman and CEO David Farnsworth Executive Vice President and CFO February 6, 2024, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET February 6, 2024 © Mercury Systems, Inc.2 Does not contain Technical Data. //Mercury Proprietary/No Tech Data// Forward-looking safe har

February 6, 2024 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Second Quarter Fiscal 2024 Results •Q2 FY24 Bookings of $325.4 million; book-to-bill ratio of 1.65 •Q2 FY24 Revenue of $197.5 million; GAAP net loss and adjusted EBITDA ($45.6) million and ($21.3) million, respectively •Q2 FY24 Cash flow from operations of $45.5 million, free cash flow $37.5 million ANDOVER, Mass. February 6, 2024 Mercury

February 6, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 29, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 001-41194 MERCURY SYSTEMS,

February 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 6, 2024 Mercury Systems, Inc.

January 17, 2024 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 12, 2024 Mercury Systems, Inc.

January 17, 2024 EX-99.1

Mercury Simplifies Its Organizational Structure to Align with Strategy, Appoints Chief Operating Officer ANDOVER, Mass. – Jan. 17, 2024 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers mission-critical processi

Mercury Simplifies Its Organizational Structure to Align with Strategy, Appoints Chief Operating Officer ANDOVER, Mass.

November 15, 2023 EX-99.1

Does not contain Technical Data. //No Tech Data// Does not contain Technical Data. //No Tech Data// Mercury Announces Mission Systems Leadership Transition ANDOVER, Mass. – Nov. 15, 2023 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a technol

a8-k2023111523exhibit99 Does not contain Technical Data. //No Tech Data// Does not contain Technical Data. //No Tech Data// Mercury Announces Mission Systems Leadership Transition ANDOVER, Mass. – Nov. 15, 2023 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers mission-critical processing power to the edge, today announced the departure of Dr. Mitch Stevison,

November 15, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 15, 2023 Mercury Systems,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 15, 2023 Mercury Systems, Inc.

November 9, 2023 EX-99.2

Deferred Compensation Matching Plan Adoption Agreement (incorporated herein by reference to Exhibit 99.2 of the Company’s Registration Statement on Form S-8 filed on November 9, 2023)

Mercury Systems, Inc. Deferred Compensation Matching Plan (DCMP) Adoption Agreement Table of Contents 1.01 Preamble 1 1.02 Plan 1 1.03 Plan Sponsor 1 1.04 Employer 2 1.05 Administrator 2 1.06 Key Employee Determination Dates 2 2.01 Participation 3 3.01 Compensation 4 3.02 Bonuses 5 4.01 Participant Contributions 6 5.01 Employer Contributions 8 6.01 Distributions 12 7.01 Vesting 19 8.01 Unforeseeab

November 9, 2023 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 (Form Type) Mercury Systems, Inc.

November 9, 2023 S-8

As filed with the Securities and Exchange Commission on November 9, 2023

As filed with the Securities and Exchange Commission on November 9, 2023 Registration No.

November 9, 2023 EX-99.1

Deferred Compensation Matching Plan (incorporated herein by reference to Exhibit 99.1 of the Company’s Registration Statement on Form S-8 filed on November 9, 2023)

Mercury Systems, Inc. Deferred Compensation Matching Plan (DCMP) Effective January 1, 2024 Table of Contents Preamble 1 Article 1 - General 1-1 1.1. Plan 1-1 1.2. Effective Dates 1-1 1.3. Amounts Not Subject to Code Section 409A 1-1 Article 2 - Definitions 2-1 2.1. Account 2-1 2.2. Administrator 2-1 2.3. Adoption Agreement 2-1 2.4. Beneficiary 2-1 2.5. Board or Board of Directors 2-1 2.6. Bonus 2-

November 8, 2023 EX-99.1

Mercury Systems, Inc. Amended and Restated 2018 Stock Incentive Plan

MERCURY SYSTEMS, INC. AMENDED AND RESTATED 2018 STOCK INCENTIVE PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Mercury Systems, Inc. 2018 Stock Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and other key persons (including consultants and qualified individuals who have received o

November 8, 2023 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 (Form Type) Mercury Systems, Inc.

November 8, 2023 S-8

As filed with the Securities and Exchange Commission on November 8, 2023

As filed with the Securities and Exchange Commission on November 8, 2023 Registration No.

November 7, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 7, 2023 Mercury Systems, Inc.

November 7, 2023 EX-99.2

© Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus President and CEO David Farnsworth Executive Vice President and CFO November 7, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by

© Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2024 FINANCIAL RESULTS Bill Ballhaus President and CEO David Farnsworth Executive Vice President and CFO November 7, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET November 7, 2023 © Mercury Systems, Inc.2 Does not contain Technical Data. //Mercury Proprietary/No Tech Data// Forward-looking safe har

November 7, 2023 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports First Quarter Fiscal 2024 Results ANDOVER, Mass. November 7, 2023 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), reported operating results for the first quarter of fiscal year 2024, ended September 29, 2023. “In the first quarter, we made progress against our enhanced execution plan to deliver predictable results, build a thriving gr

November 7, 2023 EX-10.1

Amendment No. 5 to Credit Agreement, dated November 7, 2023, among the Company, the Guarantors party thereto, the Lenders party thereto and Bank of America, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 of the Company’s current report on Form 8-K filed on November 7, 2023)

Execution Version AMENDMENT NO. 5 This AMENDMENT NO. 5 dated as of November 7, 2023 (this “Amendment”), is entered into among MERCURY SYSTEMS, INC., a Massachusetts corporation (the “Borrower”), certain subsidiaries of the Borrower, as Guarantors, the Lenders party hereto (collectively, the “Lenders” and individually, a “Lender”), and BANK OF AMERICA, N.A., in its capacity as administrative agent

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 29, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, I

October 31, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 31, 2023 Mercury Systems, Inc.

October 4, 2023 S-3ASR

As filed with the Securities and Exchange Commission on October 4, 2023

As filed with the Securities and Exchange Commission on October 4, 2023 Registration Statement No.

October 4, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107.1 Calculation of Filing Fee Table FORM S-3 Registration Statement Under the Securities Act of 1933 (Form Type) Mercury Systems, Inc. (Exact Name of the Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit (1) M

September 21, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy State

September 6, 2023 SC 13G/A

MRCY / Mercury Systems Inc / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 3)* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) August 31, 2023 (Date of Event Wh

August 15, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 15, 2023 Mercury Systems, Inc.

August 15, 2023 EX-99.2

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2023 FINANCIAL RESULTS Bill Ballhaus President and CEO David Farnsworth Executive Vice President and CFO August 15, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay availabl

q4fy23earningspresentati © Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2023 FINANCIAL RESULTS Bill Ballhaus President and CEO David Farnsworth Executive Vice President and CFO August 15, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET August 15, 2023 © Mercury Systems, Inc.2 Does not contain Technical Data. / /Mercury Proprietary/ No Tech D

August 15, 2023 EX-10.1

Employment Agreement, dated August 15, 2023, between the Company and William L. Ballhaus (incorporated herein by reference to Exhibit 10.1 of the Company’s current report on Form 8-K filed on August 15, 2023)

exhibit10 EXECUTION VERSION Does not contain Technical Data. //Mercury Proprietary/No Tech Data// EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (this “Agreement”), effective as of August 15, 2023 (the “Effective Date”), is entered into by and between Mercury Systems, Inc. (the “Company”) and William L. Ballhaus (the “Executive”). WHEREAS, the Executive is currently employed as Interim President a

August 15, 2023 EX-21.1

Subsidiaries of the Company

EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION OF ORGANIZATION Mercury Mission Systems, LLC Delaware Mercury Computer Systems Limited United Kingdom Mercury Mission Systems Canada, Inc. Canada Mercury Mission Systems International Holding, SA Switzerland Mercury Mission Systems International, SA Switzerland Mercury Mission Systems Spain, SL Spain Mercury Systems SARL France

August 15, 2023 EX-99.3

Mercury Systems Names Bill Ballhaus as President and CEO ANDOVER, Mass. – August 15, 2023 – Mercury Systems, Inc. (the “Company” or “Mercury”) (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers processing power for the most demanding ae

exhibit993 Mercury Systems Names Bill Ballhaus as President and CEO ANDOVER, Mass.

August 15, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO . COMMISSION FILE NUMBER 0-23599 MERCURY SYSTEMS, INC. (Exact n

August 15, 2023 EX-10.6

Compensation Policy for Non-Employee Directors

EXHIBIT 10.6 MERCURY SYSTEMS, INC. Compensation Policy for Non-Employee Directors Cash Compensation Annual retainer for non-employee directors: $65,000 per annum, paid quarterly Additional annual retainers (all per annuum, paid quarterly): Independent Chair: $45,000 Lead Independent Director: $35,000 Chair of the Audit Committee: $25,000 Chair of the Human Capital and Compensation Committee: $20,0

August 15, 2023 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Fourth Quarter and Fiscal 2023 Results and Progress Against Enhanced Execution Plan Bill Ballhaus appointed as President and CEO Management and Board of Directors aligned on strength of strategy and business model Initial cost actions result in approximately $20 million to $22 million of net savings in fiscal 2024 Strong demand environment

August 15, 2023 EX-19.1

Insider Trading Policy

Exhibit 19.1 Mercury Systems, Inc. Company Policy Effective Date: May 13, 2022 COR-P04-05 Approver: Christopher C. Cambria Securities Trades by Company Personnel Authorized By: EVP, General Counsel and Secretary The Need For A Policy Statement. This Statement sets forth the policy of Mercury Systems, Inc. and its subsidiaries (collectively, “Mercury”) regarding insider trading and the disclosure o

August 15, 2023 EX-10.3

2018 Stock Incentive Plan, as amended and restated

Exhibit 10.3 MERCURY SYSTEMS, INC. AMENDED AND RESTATED 2018 STOCK INCENTIVE PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Mercury Systems, Inc. 2018 Stock Incentive Plan (the “Plan”). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and other key persons (including consultants and qualified individuals who ha

July 20, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 20, 2023 Mercury Systems, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 20, 2023 Mercury Systems, Inc.

July 7, 2023 EX-10.1

Partners LLC (incorporated herein by reference to Exhibit 10.1 of the Company’s current report on Form 8-K filed on July 6, 2023)

votingagreement Execution Version 1 VOTING AGREEMENT This agreement, dated July 6, 2023 (this “Agreement”), is by and between Mercury Systems, Inc.

July 7, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 6, 2023 Mercury Systems, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 6, 2023 Mercury Systems, Inc.

July 7, 2023 EX-99.1

Mercury Systems Advances Go-Forward Strategic Plan Through Continued Board Refreshment

FOR IMMEDIATE RELEASE Mercury Systems Advances Go-Forward Strategic Plan Through Continued Board Refreshment ANDOVER, Mass.

July 6, 2023 SC 13D

MRCY / Mercury Systems Inc / JANA PARTNERS LLC - MERCURY SYSTEMS INC Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No.) Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) Eleazer

June 29, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 29, 2023 Mercury Systems, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 29, 2023 Mercury Systems, Inc.

June 29, 2023 EX-10.1

Letter Agreement, dated June 20, 2023, between the Company and David E. Farnsworth (incorporated herein by reference to Exhibit 10.1 of the Company’s current report on Form 8-K filed on June 29, 2023)

davefarnsworthofferlette

June 29, 2023 EX-99.1

Mercury Systems Announces Appointments of Chief Financial Officer and Independent Director Finance and Technology Leader, David Farnsworth, Named CFO Former Chairman and CEO of Leidos, Roger Krone, Appointed to Board ANDOVER, Mass. – June 29, 2023 –

mercurycfoandboardappoin Mercury Systems Announces Appointments of Chief Financial Officer and Independent Director Finance and Technology Leader, David Farnsworth, Named CFO Former Chairman and CEO of Leidos, Roger Krone, Appointed to Board ANDOVER, Mass.

June 23, 2023 EX-99.1

Mercury Systems to Focus on Enhanced Execution of Strategic Plan Under Refreshed Leadership Team Board Concludes Thorough Review of Strategic Alternatives; Remains Open to All Pathways to Maximize Shareholder Value Board Appoints Bill Ballhaus Interi

FOR IMMEDIATE RELEASE Mercury Systems to Focus on Enhanced Execution of Strategic Plan Under Refreshed Leadership Team Board Concludes Thorough Review of Strategic Alternatives; Remains Open to All Pathways to Maximize Shareholder Value Board Appoints Bill Ballhaus Interim President and CEO Following Resignation of Mark Aslett; Initiates Search for Permanent Successor Defense Technology Leader Joins Board as Independent Director; Second Highly Qualified Candidate to Join Board as Independent Director New Permanent CFO Identified ANDOVER, Mass.

June 23, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 23, 2023 Mercury Systems, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 23, 2023 Mercury Systems, Inc.

June 15, 2023 SC 13D/A

MRCY / Mercury Systems Inc / Starboard Value LP - AMENDMENT NO. 2 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 2)1 Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) JEFFREY C. SMITH

May 31, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc.

May 31, 2023 EX-1.01

Exhibit 1.01 – Mercury Systems, Inc. Conflict Minerals Report for the Year Ended December 31, 2022

Exhibit 1.01 Mercury Systems, Inc. Conflict Minerals Report For the Year Ended December 31, 2022 This conflict minerals report for the year ended December 31, 2022 is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended. The U.S. Securities and Exchange Commission (“SEC”) issued Rule 13p-1 to implement the reporting and disclosure requirements related to confli

May 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC.

May 2, 2023 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Third Quarter Fiscal 2023 Results Third Quarter Highlights Include: Revenues increased 4% year over year exceeding guidance Positive organic revenue growth in the quarter Strong demand environment supports long term outlook ANDOVER, Mass. May 2, 2023 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), reported operating results for the thi

May 2, 2023 EX-99.2

© Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michelle McCarthy Senior Vice President and Interim CFO May 2, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by

q3fy23earningspresentati © Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michelle McCarthy Senior Vice President and Interim CFO May 2, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET May 2, 2023 © Mercury Systems, Inc.2 Does not contain Technical Data. / /Mercury Proprietary/ No Tech Data/ / Fo

May 2, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2023 Mercury Systems, Inc. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 2, 2023 Mercury Systems, Inc.

February 14, 2023 SC 13G/A

MRCY / Mercury Systems Inc / BANK OF AMERICA CORP /DE/ Passive Investment

SC 13G/A 1 doc1.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 01)* Mercury Systems, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule p

February 14, 2023 EX-99

BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY BANK OF AMERICA CORPORATION

EX-99 2 boa-poa2.htm BANK OF AMERICA CORPORATION LIMITED POWER OF ATTORNEY BANK OF AMERICA CORPORATION, a Delaware corporation (the "Corporation"), does hereby make, constitute, and appoint each of Kelvin Kwok, Tolu Tade, Andres Ortiz Custodio, Frank Lui, James Todd, Zainab Tarteel, Hannah Chae and Monica Yako as an attorney-in-fact for the Corporation acting for the Corporation and in the Corpora

February 9, 2023 SC 13G/A

MRCY / Mercury Systems Inc / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

SC 13G/A 1 tm235848d11sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. 2)* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP

February 9, 2023 SC 13G/A

MRCY / Mercury Systems Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01406-mercurysystemsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: Mercury Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 589378108 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to desi

February 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, IN

February 6, 2023 SC 13G/A

MRCY / Mercury Systems Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* MERCURY SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

February 3, 2023 SC 13D/A

MRCY / Mercury Systems Inc / JANA PARTNERS LLC - MERCURY SYSTEMS, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 2) Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) Elea

January 31, 2023 EX-99.3

© Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO January 31, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7

EX-99.3 4 a2023q2earningspresentat.htm EX-99.3 © Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO January 31, 2023, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET January 31, 2023 © Mercury Systems, Inc.2 Forward-looking safe harbor statement This presen

January 31, 2023 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Second Quarter Fiscal 2023 Results; Initiates Review of Strategic Alternatives Second Quarter Highlights Include: Bookings of $270.3M yielding book-to-bill of 1.18 Record backlog of $1.12 billion Revenues increased 4% over prior year with positive organic growth Generated positive cash flow ANDOVER, Mass. January 31, 2023 Mercury Systems,

January 31, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): January 31, 2023 Mercury Systems, Inc.

January 31, 2023 EX-99.2

Mercury Systems Announces CFO Transition ANDOVER, Mass. – January 31, 2023 – Mercury Systems, Inc. (“Mercury” or the “Company”), (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers processing power for the most demanding aerospace and de

Mercury Systems Announces CFO Transition ANDOVER, Mass. – January 31, 2023 – Mercury Systems, Inc. (“Mercury” or the “Company”), (NASDAQ: MRCY, www.mrcy.com), a technology company that delivers processing power for the most demanding aerospace and defense missions, today announced that Michael Ruppert, Executive Vice President, Chief Financial Officer, and Treasurer, will step down from the Compan

November 8, 2022 S-8

As filed with the Securities and Exchange Commission on November 8, 2022

As filed with the Securities and Exchange Commission on November 8, 2022 Registration No.

November 8, 2022 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 Registration Statement Under the Securities Act of 1933 (Form Type) Mercury Systems, Inc.

November 8, 2022 EX-10.3

Letter Agreement, dated September 17, 2021, between the Company and Charles R. Wells, IV

November 8, 2022 EX-99.1

Amended and Restated 2018 Stock Incentive Plan

MERCURY SYSTEMS, INC. AMENDED AND RESTATED 2018 STOCK INCENTIVE PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Mercury Systems, Inc. 2018 Stock Incentive Plan (the ?Plan?). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and other key persons (including consultants and qualified individuals who have received o

November 8, 2022 S-8 POS

As filed with the Securities and Exchange Commission on November 8, 2022

As filed with the Securities and Exchange Commission on November 8, 2022 Registration No.

November 8, 2022 EX-10.2

Letter Agreement, dated September 15, 2021, between the Company and James M. Stevison

November 8, 2022 EX-10.1

Letter Agreement, dated July 26, 2021, between the Company and Thomas Huber

November 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, I

November 1, 2022 EX-99.2

© Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 1, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:

? Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2023 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 1, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET November 1, 2022 ? Mercury Systems, Inc.2 Forward-looking safe harbor statement This presentation contains certain forward-looking statemen

November 1, 2022 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports First Quarter Fiscal 2023 Results First Quarter Highlights Include: Bookings of $266.9M yielding book-to-bill of 1.17 Record backlog of $1.08 billion Continues to be well positioned for strong FY23 ANDOVER, Mass. November 1, 2022 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), reported operating results for the first quarter of fiscal

November 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 1, 2022 Mercury Systems, Inc.

October 31, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 31, 2022 Mercury Systems, Inc.

October 28, 2022 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): October 28, 2022 Mercury Systems, Inc.

October 28, 2022 EX-3.1

By-laws, amended and restated effective October 26, 2022 (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Commission on October 28, 2022)

BY-LAWS of MERCURY SYSTEMS, INC. | TABLE OF CONTENTS Article I. Articles of Organization 1 Article II. Fiscal Year 1 Article III. Meetings of Stockholders 1 Section 3.1 Annual Meeting 1 Section 3.2 Special Meetings 5 Section 3.3 Duty to Update and Supplement. 8 Section 3.4 Place of Meetings 9 Section 3.5 Notice of Meetings 9 Section 3.6 Quorum and Adjournment 9 Section 3.7 Action without Meeting 1

September 8, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

August 16, 2022 EX-10.6

Compensation Policy for Non-Employee Directors

EXHIBIT 10.6 MERCURY SYSTEMS, INC. Compensation Policy for Non-Employee Directors Cash Compensation Annual retainer for non-employee directors: $65,000 per annum, paid quarterly Additional annual retainers: Independent Chairman: $45,000 per annum, paid quarterly Chairman of the Audit Committee: $25,000 per annum, paid quarterly Chairman of the Compensation Committee: $20,000 per annum, paid quarte

August 16, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED July 1, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO . COMMISSION FILE NUMBER 0-23599 MERCURY SYSTEMS, INC. (Exact na

August 16, 2022 EX-21.1

Subsidiaries of the Company

EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION OF ORGANIZATION Mercury Mission Systems, LLC Delaware Pentek Systems, Inc. New Jersey Lexavia Integrated Systems, LLC Florida Nihon Mercury Computer Systems K.K. Japan Mercury Computer Systems Limited United Kingdom Mercury Mission Systems Canada, Inc. Canada Mercury Mission Systems International Holding, SA Switzerland Mercury Mission

August 16, 2022 EX-10.1

1997 Employee Stock Purchase Plan, as amended and restated

Exhibit 10.1 MERCURY SYSTEMS, INC. 1997 EMPLOYEE STOCK PURCHASE PLAN (as amended and restated through April 27, 2022) 1. PURPOSE. It is the purpose of this 1997 Employee Stock Purchase Plan (the ?Plan?) to provide a means whereby eligible employees may purchase Common Stock of Mercury Systems, Inc. (the ?Company?) and any subsidiaries as defined below through after-tax payroll deductions. It is in

August 10, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 10, 2022 Mercury Systems, Inc.

August 10, 2022 EX-99.1

© Mercury Systems, Inc. STEWARDSHIP ENGAGEMENT August 2022 © Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Refor

? Mercury Systems, Inc. STEWARDSHIP ENGAGEMENT August 2022 ? Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including those relating to the products and services described herein and to fiscal 2023 business performance and beyond and the Compa

August 2, 2022 EX-99.2

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO August 2, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO August 2, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET August 2, 2022 © Mercury Systems, Inc.2 Does not contain Technical Data. //Mercury Proprietary/No Tech Data// Forward-looking safe harbo

August 2, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 2, 2022 Mercury Systems, Inc.

August 2, 2022 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Fourth Quarter and Fiscal 2022 Results Fourth Quarter Highlights Include: Record bookings of $332 million yielding book-to-bill of 1.14 Record revenues of $290 million increased 16% over prior year Well-positioned for strong financial performance in FY23 Executing 1MPACT value creation initiative ANDOVER, Mass. August 2, 2022 Mercury Syste

June 27, 2022 SC 13D/A

MRCY / Mercury Systems Inc / JANA PARTNERS LLC - MERCURY SYSTEMS, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 1) Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) Elea

June 24, 2022 EX-99.1

[The remainder of this page intentionally left blank]

Exhibit 99.1 Execution Version AGREEMENT This Agreement (this ?Agreement?) is made and entered into as of June 23, 2022, by and among Mercury Systems, Inc., a Massachusetts corporation (the ?Company?), and the entities and natural persons set forth on the signature pages hereto (collectively, ?Starboard?) (each of the Company and Starboard, a ?Party? to this Agreement, and collectively, the ?Parti

June 24, 2022 SC 13D/A

MRCY / Mercury Systems Inc / Starboard Value LP - AMENDMENT NO. 1 TO THE SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2(a) (Amendment No. 1)1 Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) JEFFREY C. SMITH

June 24, 2022 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 24, 2022 Mercury Systems, Inc.

June 24, 2022 EX-4.1

First Amendment to Rights Agreement, dated June 23, 2022, between Mercury Systems, Inc. and Computershare Trust Company, N.A., as Rights Agent

FIRST AMENDMENT TO RIGHTS AGREEMENT THIS FIRST AMENDMENT TO RIGHTS AGREEMENT (this ?Amendment?) is entered into as of June 23, 2022, by and between Mercury Systems, Inc.

June 24, 2022 EX-99.1

FOR IMMEDIATE RELEASE Mercury Systems appoints Howard Lance and Bill Ballhaus to Board of Directors Enters into cooperation agreements with Jana Partners and Starboard Value ANDOVER, Mass. – June 24, 2022 – Mercury Systems, Inc. (“Mercury” or the “Co

FOR IMMEDIATE RELEASE Mercury Systems appoints Howard Lance and Bill Ballhaus to Board of Directors Enters into cooperation agreements with Jana Partners and Starboard Value ANDOVER, Mass.

June 24, 2022 EX-10.2

Agreement, dated June 23, 2022, by and among Mercury Systems, Inc., Starboard Value LP and the other entities and persons listed on the signature pages thereto

Execution Version AGREEMENT This Agreement (this ?Agreement?) is made and entered into as of June 23, 2022, by and among Mercury Systems, Inc.

June 24, 2022 EX-10.1

Cooperation Agreement, dated June 23, 2022, by and between Mercury Systems, Inc. and JANA Partners LLC

Execution Version 1 COOPERATION AGREEMENT This cooperation agreement, dated June 23, 2022 (this ?Agreement?), is by and between Mercury Systems, Inc.

June 24, 2022 8-A12B/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A (Amendment No. 1) FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 Mercury Systems, Inc. (Ex

8-A12B/A 1 form8-afirstamendmenttorig.htm 8-A12B/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A/A (Amendment No. 1) FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 Mercury Systems, Inc. (Exact Name of Registrant as Specified in its Charter) Massachusetts 04-2741391 (State of Incorporatio

June 7, 2022 EX-99.1

© Mercury Systems, Inc. WILLIAM BLAIR & CO 42ND ANNUAL GROWTH STOCK CONFERENCE Mike Ruppert Executive Vice President & CFO June 7, 2022 © Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking s

? Mercury Systems, Inc. WILLIAM BLAIR & CO 42ND ANNUAL GROWTH STOCK CONFERENCE Mike Ruppert Executive Vice President & CFO June 7, 2022 ? Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including those relating to the products and services desc

June 7, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): June 7, 2022 Mercury Systems, Inc.

June 6, 2022 S-8

As filed with the Securities and Exchange Commission on June 6, 2022

As filed with the Securities and Exchange Commission on June 6, 2022 Registration No.

June 6, 2022 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-8 Registration Statement Under the Securities Act of 1933 (Form Type) Mercury Systems, Inc.

May 31, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter)

SD 1 formsd202111.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter) Massachusetts 000-23599 04-2741391 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) 50 Minuteman Road, Andover, Massachusetts 01810 (Addr

May 31, 2022 EX-1.01

Exhibit 1.01 – Mercury Systems, Inc. Conflict Minerals Report for the Year Ended December 31, 2021

Exhibit 1.01 Mercury Systems, Inc. Conflict Minerals Report For the Year Ended December 31, 2021 This conflict minerals report for the year ended December 31, 2021 is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended. The U.S. Securities and Exchange Commission (“SEC”) issued Rule 13p-1 to implement the reporting and disclosure requirements related to confli

May 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended April 1, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC. (

May 3, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 3, 2022 Mercury Systems, Inc.

May 3, 2022 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Third Quarter Fiscal 2022 Results Third Quarter Highlights Include: Record bookings of $295 million yielding book-to-bill of 1.17 Well-positioned to return to organic growth with record backlog of $996 million Refinanced and increased revolving credit facility to $1.1 billion Executing 1MPACT value creation initiative as planned ANDOVER, M

May 3, 2022 EX-99.2

© Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO May 3, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.

? Mercury Systems, Inc. THIRD QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO May 3, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET May 3, 2022 ? Mercury Systems, Inc.2 Does not contain Technical Data. //No Tech Data// Forward-looking safe harbor statement This presentation c

February 28, 2022 EX-10.1

Amendment No. 4 to Credit Agreement, dated February 28, 2022, among Mercury Systems, Inc., the Guarantors party thereto, the Lenders party thereto and Bank of America, N.A., as Administrative Agent

Execution Version AMENDMENT NO. 4 This AMENDMENT NO. 4 dated as of February 28, 2022 (this ?Amendment?), is entered into among MERCURY SYSTEMS, INC., a Massachusetts corporation (the ?Borrower?), certain subsidiaries of the Borrower, as Guarantors, the Lenders party hereto (collectively, the ?Lenders? and individually, a ?Lender?), and BANK OF AMERICA, N.A., in its capacity as administrative agent

February 28, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 28, 2022 Mercury Systems, Inc.

February 10, 2022 SC 13G/A

MRCY / Mercury Systems Inc / WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2 (Amendment No. 1)* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) December 31, 2021 (Date of Event

February 10, 2022 SC 13G/A

MRCY / Mercury Systems Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: Mercury Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 589378108 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 8, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, IN

February 8, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 8, 2022 Mercury Systems, Inc.

February 8, 2022 EX-99.1

FOR IMMEDIATE RELEASE Mercury Systems Board of Directors implements equity retention plan Prioritizes retention and motivation of leaders in challenging industry environment ANDOVER, Mass. – Feb. 8, 2022 – Mercury Systems, Inc. (“Mercury” or the “Com

pressrelease2022020822 FOR IMMEDIATE RELEASE Mercury Systems Board of Directors implements equity retention plan Prioritizes retention and motivation of leaders in challenging industry environment ANDOVER, Mass.

February 4, 2022 SC 13G

MRCY / Mercury Systems Inc / WELLINGTON MANAGEMENT GROUP LLP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* MERCURY SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sche

February 1, 2022 EX-99.2

© Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO February 1, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7

? Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO February 1, 2022, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET February 1, 2022 ? Mercury Systems, Inc.2 Does not contain Technical Data. //No Tech Data// Forward-looking safe harbor statement This pre

February 1, 2022 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Second Quarter Fiscal 2022 Results Second Quarter Highlights Include: Bookings of $237 million yielding book-to-bill of 1.08 Revenues of $220 million increased 5% over prior year Completed the acquisitions of Avalex Technologies and Atlanta Micro Executing on 1MPACT value creation initiative as planned ANDOVER, Mass. February 1, 2022 Mercu

February 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 1, 2022 Mercury Systems, Inc.

January 31, 2022 SC 13G

MRCY / Mercury Systems Inc / BANK OF AMERICA CORP /DE/ Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. N/A)* MERCURY SYSTEMS INC (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

January 13, 2022 EX-99.3

January 13, 2022

Exhibit 99.3 January 13, 2022 Mercury Systems, Inc. 50 Minutemen Road Andover, MA Attn: Board of Directors Dear Members of the Board, As you are aware, we are shareholders of Mercury Systems (the ?Company?) and currently own 7.33% of the Company. We appreciate the conversations over the past several months with the Company?s management team and continue to believe there is a substantial value crea

January 13, 2022 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including additional amendments thereto) with respect to the shares of Common Stock, par value $0.01 per share, of Mercury Systems, Inc. This Joint Filing Agree

January 13, 2022 EX-99.2

POWER OF ATTORNEY

Exhibit 99.2 POWER OF ATTORNEY The undersigned hereby appoints Jeffrey C. Smith, Peter A. Feld and Kenneth R. Marlin, or any of them, his true and lawful attorney-in fact and agent to execute and file with the Securities and Exchange Commission any Schedule 13D, Schedule 13G, Form 3, Form 4, Form 5, any settlement agreement, any amendments to any of the foregoing and any related documentation whic

January 13, 2022 SC 13D/A

MRCY / Mercury Systems Inc / Starboard Value LP - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO ? 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO ? 240.13d-2(a) (Amendment No. )1 Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) JEFFREY C. SMITH

January 10, 2022 SC 13G

MRCY / Mercury Systems Inc / Conestoga Capital Advisors, LLC - CONESTOGA CAPITAL ADVISORS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Mercury Systems Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

December 29, 2021 EX-99.1

Mercury Systems adopts limited-duration shareholder rights plan December 28, 2021 ANDOVER, Mass., Dec. 28, 2021 (GLOBE NEWSWIRE) -- Mercury Systems Inc. (“Mercury” or the “Company”), (NASDAQ: MRCY, www.mrcy.com), a leader in trusted, secure mission-c

EX-99.1 4 a8-k2021122921pressrelea.htm EX-99.1 Mercury Systems adopts limited-duration shareholder rights plan December 28, 2021 ANDOVER, Mass., Dec. 28, 2021 (GLOBE NEWSWIRE) - Mercury Systems Inc. (“Mercury” or the “Company”), (NASDAQ: MRCY, www.mrcy.com), a leader in trusted, secure mission-critical technologies for aerospace and defense, today announced that its Board of Directors has adopted

December 29, 2021 EX-4.1

Rights Agreement, dated as of December 27, 2021, between Mercury Systems, Inc. and Computershare Trust Company, N.A., including the Form of Rights Certificate as Exhibit A thereof, the Form of Summary of Rights as Exhibit B thereof and the Form Articles of Amendment as Exhibit C thereof.

MERCURY SYSTEMS, INC. and COMPUTERSHARE TRUST COMPANY, N.A. As Rights Agent Rights Agreement Dated as of December 27, 2021 i TABLE OF CONTENTS Page SECTION 1. Certain Definitions .................................................................................................... 1 SECTION 2. Appointment of Rights Agent ...............................................................................

December 29, 2021 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 29, 2021 Mercury Systems, Inc.

December 29, 2021 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934 Mercury Systems, Inc. (Exact name of registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934 Mercury Systems, Inc. (Exact name of registrant as specified in its charter) Massachusetts 04-2741391 (State of incorporation or organization) (I.R.S. Employer Identification No.) 50 Minuteman Road

December 29, 2021 EX-3.1

Articles of Amendment (incorporated herein by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K filed with the Commission on December 29, 2021)

EX-3.1 2 a2021122921articlesofame.htm EX-3.1 EXHIBIT C to Rights Agreement C-2 C-3 EXHIBIT A Article 4 is hereby amended by adding the following to the end of Article 4: F. DESCRIPTION OF SERIES A JUNIOR PREFERRED STOCK. 1. DESIGNATION AND AMOUNT. The shares of such series shall be designated as “Series A Junior Preferred Stock” and the number of shares constituting such series shall be 800,000 pr

December 23, 2021 SC 13D

MRCY / Mercury Systems Inc / JANA PARTNERS LLC - MERCURY SYSTEMS, INC. Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. ) Mercury Systems, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 589378108 (CUSIP Number) Eleazer

November 29, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 29, 2021 Mercury Systems, Inc.

November 29, 2021 EX-99.1

Mercury Systems acquires Atlanta Micro November 29, 2021 Expands Company’s RF and microwave component portfolio Deepens market penetration in core EW, radar, and weapons markets Strengthens Mercury’s leadership position in trusted microelectronics Hi

EX-99.1 2 atlantamicroprfinal.htm EX-99.1 Mercury Systems acquires Atlanta Micro November 29, 2021 Expands Company’s RF and microwave component portfolio Deepens market penetration in core EW, radar, and weapons markets Strengthens Mercury’s leadership position in trusted microelectronics High growth, high margin transaction expected to be immediately accretive ANDOVER, Mass., Nov. 29, 2021 (GLOBE

November 9, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ________________________________________________________________ ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quart

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended October 1, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC.

November 9, 2021 S-8 POS

As filed with the Securities and Exchange Commission on November 9, 2021

As filed with the Securities and Exchange Commission on November 9, 2021 Registration No.

November 9, 2021 S-8

As filed with the Securities and Exchange Commission on November 9, 2021

As filed with the Securities and Exchange Commission on November 9, 2021 Registration No.

November 8, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 8, 2021 Mercury Systems, Inc.

November 8, 2021 EX-99.1

50 Minuteman Road • Andover, MA 01810 • 866.627.6951 • mrcy.com FOR IMMEDIATE RELEASE Mercury Systems completes acquisition of Avalex Technologies ANDOVER, Mass. – Nov. 8, 2021 – Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a leader in trusted

50 Minuteman Road ? Andover, MA 01810 ? 866.627.6951 ? mrcy.com FOR IMMEDIATE RELEASE Mercury Systems completes acquisition of Avalex Technologies ANDOVER, Mass. ? Nov. 8, 2021 ? Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), a leader in trusted, secure mission-critical technologies for aerospace and defense, today announced the completion of its acquisition of Avalex Technologies (?Avalex?).

November 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2021 Mercury Systems, Inc.

November 2, 2021 EX-99.2

© Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 2, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:

EX-99.2 3 q1fy22earningspresentati.htm EX-99.2 © Mercury Systems, Inc. FIRST QUARTER FISCAL YEAR 2022 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 2, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET November 2, 2021 © Mercury Systems, Inc.2 Forward-looking safe harbor statement This present

November 2, 2021 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports First Quarter Fiscal 2022 Results First Quarter Highlights Include: Revenues of $225 million increased 9% over prior year Executing on 1MPACT value creation initiative Announced agreement to acquire Avalex Technologies ANDOVER, Mass. November 2, 2021 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), reported operating results for the fir

November 1, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 1, 2021 Mercury Systems, Inc.

September 27, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): September 27, 2021 Mercury Systems, Inc.

September 27, 2021 EX-99.1

50 Minuteman Road • Andover, MA 01810 • 866.627.6951 • mrcy.com FOR IMMEDIATE RELEASE Mercury Systems to acquire Avalex Technologies Corporation • Continues to scale Mercury’s global avionics and mission systems business • Complementary capabilities

50 Minuteman Road ? Andover, MA 01810 ? 866.627.6951 ? mrcy.com FOR IMMEDIATE RELEASE Mercury Systems to acquire Avalex Technologies Corporation ? Continues to scale Mercury?s global avionics and mission systems business ? Complementary capabilities enhance position at forefront of military digital convergence ? Strong growth profile driven by platform modernization, supply chain delayering, innov

September 14, 2021 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defi

September 9, 2021 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

August 17, 2021 EX-21.1

Subsidiaries of the Company

EXHIBIT 21.1 SUBSIDIARIES OF THE REGISTRANT NAME JURISDICTION OF ORGANIZATION Mercury Mission Systems, LLC Delaware Pentek Systems, Inc. New Jersey Nihon Mercury Computer Systems K.K. Japan Mercury Computer Systems Limited United Kingdom Mercury Mission Systems Canada, Inc. Canada Mercury Mission Systems International Holding, SA Switzerland Mercury Mission Systems International, SA Switzerland Me

August 17, 2021 EX-10.8

Compensation Policy for Non-Employee Directors

EXHIBIT 10.8 MERCURY SYSTEMS, INC. Compensation Policy for Non-Employee Directors Objective It is the objective of Mercury to compensate non-employee directors in a manner which will enable recruitment and retention of highly qualified directors and fairly compensate them for their services as a director. Philosophy Board of Director compensation includes cash and equity. It is annually reviewed b

August 17, 2021 EX-10.5

2018 Stock Incentive Plan, as amended and restated

Exhibit 10.5 MERCURY SYSTEMS, INC. AMENDED AND RESTATED 2018 STOCK INCENTIVE PLAN SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS The name of the plan is the Mercury Systems, Inc. 2018 Stock Incentive Plan (the ?Plan?). The purpose of the Plan is to encourage and enable the officers, employees, Non-Employee Directors and other key persons (including consultants and qualified individuals who ha

August 17, 2021 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED July 2, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO . COMMISSION FILE NUMBER 0-23599 MERCURY SYSTEMS, INC. (Exact na

August 4, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 4, 2021 Mercury Systems, Inc.

August 4, 2021 EX-99.1

© Mercury Systems, Inc. JEFFERIES VIRTUAL INDUSTRIALS CONFERENCE Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO August 4, 2021 © Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain f

? Mercury Systems, Inc. JEFFERIES VIRTUAL INDUSTRIALS CONFERENCE Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO August 4, 2021 ? Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including those relating to the acquisitio

August 3, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): August 3, 2021 Mercury Systems, Inc.

August 3, 2021 EX-99.2

© Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO August 3, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by

? Mercury Systems, Inc. FOURTH QUARTER AND FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO August 3, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET August 3, 2021 ? Mercury Systems, Inc.2 Forward-looking safe harbor statement This presentation contains certain forward-looking stateme

August 3, 2021 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

EX-99.1 2 a2021q4earningsreleaseex.htm EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Fourth Quarter and Fiscal 2021 Results Fourth Quarter Highlights Include: Revenues of $251 million increased 15% over prior year Bookings of $260 million yielding book-to-bill of 1.04 Backlog of over $900 million entering fiscal 2022 Completed the acquisition of Pentek Launched 1MPACT value cr

May 27, 2021 EX-99

FOR IMMEDIATE RELEASE Mercury Systems acquires Pentek • Expands scale and breadth of Company’s RFSoC, data recorder and software-defined radio capabilities • Deepens market penetration in core radar and electronic warfare/SIGINT markets • Complementa

FOR IMMEDIATE RELEASE Mercury Systems acquires Pentek ? Expands scale and breadth of Company?s RFSoC, data recorder and software-defined radio capabilities ? Deepens market penetration in core radar and electronic warfare/SIGINT markets ? Complementary products accelerate growth through low-risk content expansion ? Transaction expected to be immediately accretive to adjusted EPS ANDOVER, Mass.

May 27, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 27, 2021 Mercury Systems, Inc.

May 14, 2021 EX-1.01

Mercury Systems, Inc. Conflict Minerals Report for the Year Ended December 31, 2020

EX-1.01 2 conflictmineralsreportfort.htm EX-1.01 Exhibit 1.01 Mercury Systems, Inc. Conflict Minerals Report For the Year Ended December 31, 2020 This conflict minerals report for the year ended December 31, 2020 is presented to comply with Rule 13p-1 under the Securities Exchange Act of 1934, as amended. The U.S. Securities and Exchange Commission (“SEC”) issued Rule 13p-1 to implement the report

May 14, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter)

SD 1 formsd202012.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM SD Specialized Disclosure Report Mercury Systems, Inc. (Exact Name of Registrant as Specified in Charter) Massachusetts 000-23599 04-2741391 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) 50 Minuteman Road, Andover, Massachusetts 01810 (Addr

May 11, 2021 EX-99.1

© Mercury Systems, Inc. GOLDMAN SACHS INDUSTRIALS & MATERIALS CONFERENCE Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO May 11, 2021 © Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains cer

? Mercury Systems, Inc. GOLDMAN SACHS INDUSTRIALS & MATERIALS CONFERENCE Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO May 11, 2021 ? Mercury Systems, Inc. Forward-looking safe harbor statement This presentation contains certain forward-looking statements, as that term is defined in the Private Securities Litigation Reform Act of 1995, including those relating to the acqu

May 11, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 11, 2021 Mercury Systems, Inc.

May 11, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended April 2, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC. (

May 4, 2021 EX-99.2

© M er c ur y S y st e ms, I n c. T HI R D Q U A R T E R FI S C A L Y E A R 2 0 2 1 FI N A N CI A L R E S U L T S M ar k A sl ett Pr esi d e nt a n d C E O Mi c h a el R u p p ert E x e c uti v e Vi c e Pr esi d e nt a n d C F O M a y 4, 2 0 2 1, 5:

EX-99.2 3 a2021q3earningspresentat.htm EX-99.2 © M er c ur y S y st e ms, I n c. T HI R D Q U A R T E R FI S C A L Y E A R 2 0 2 1 FI N A N CI A L R E S U L T S M ar k A sl ett Pr esi d e nt a n d C E O Mi c h a el R u p p ert E x e c uti v e Vi c e Pr esi d e nt a n d C F O M a y 4, 2 0 2 1, 5: 0 0 p m E T W e b c ast l o gi n at w w w. mr c y. c o m/i n v est or W e b c ast r e pl a y a v ail a

May 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): May 4, 2021 Mercury Systems, Inc.

May 4, 2021 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Third Quarter Fiscal 2021 Results Third Quarter Highlights Include: Record revenues increased 23% over prior year Backlog of $894 million increased 16% over prior year Physical Optics Corporation integration progressing well ANDOVER, Mass. May 4, 2021 Mercury Systems, Inc. (NASDAQ: MRCY, www.mrcy.com), reported operating results for the th

March 9, 2021 CORRESP

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

March 9, 2021 Via EDGAR Division of Corporation Finance U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Heather Clark Office of Manufacturing Re: Mercury Systems, Inc. Form 10-K for the Fiscal Year Ended July 3, 2020 Filed August 18, 2020 File No. 000-23599 Dear Ms. Clark: This letter is submitted by Mercury Systems, Inc. (the ?Company,? ?Mercury? or ?w

February 11, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendme

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G* (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO § 240.13d-2 (Amendment No. )* Mercury Systems Inc (Name of Issuer) Common Stock (Title of Class of Securities) 589378108 (CUSIP Number) 12/31/2020 (Date of Event Which Re

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Mercury Systems Inc. Title of Class of Securities: Common Stock CUSIP Number: 589378108 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

February 9, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended January 1, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC.

February 2, 2021 EX-99.2

© Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO February 2, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7

EX-99.2 3 a2021q2earningspresentat.htm EX-99.2 © Mercury Systems, Inc. SECOND QUARTER FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO February 2, 2021, 5:00 pm ET Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET February 2, 2021 © Mercury Systems, Inc.2 Forward-looking safe harbor statement This presen

February 2, 2021 EX-99.1

50 Minuteman Road, Andover, Massachusetts 01810 U.S.A. | +1-(978)-256-1300 | www.mrcy.com | twitter: @MRCY

EX-99.1 2 a2021q2earningsreleaseex.htm EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE Mercury Systems Reports Second Quarter Fiscal 2021 Results Second Quarter Highlights Include: Revenue increased 9% over prior year with 9% organic growth Bookings of $210 million yield a book-to-bill of 1.0 Record backlog of $945 million increased 30% over prior year Completed acquisition of Physical Optics Corporati

February 2, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 2, 2021 Mercury Systems, Inc.

December 30, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 30, 2020 Mercury Systems, Inc.

December 30, 2020 EX-99.1

Mercury Systems Completes Acquisition of Physical Optics Corporation

EX-99.1 2 pocacquisitioncloseprfinal.htm EX-99.1 FOR IMMEDIATE RELEASE News Release Mercury Systems Completes Acquisition of Physical Optics Corporation ANDOVER, Mass. - Dec. 30, 2020 - Mercury Systems Inc. (NASDAQ: MRCY, www.mrcy.com), a leader in trusted, secure mission-critical technologies for aerospace and defense, today announced the completion of its acquisition of Physical Optics Corporati

December 8, 2020 EX-99.1

TRUIST SECURITIES 2020 INDUSTRIALS AND SERVICES SUMMIT Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO December 8, 2020 © Mercury Systems, Inc.2 Forward-looking safe harbor statement This presentation contains certain forward-

truistpresentation202012 TRUIST SECURITIES 2020 INDUSTRIALS AND SERVICES SUMMIT Mark Aslett President & CEO Mike Ruppert Executive Vice President & CFO December 8, 2020 © Mercury Systems, Inc.

December 8, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 8, 2020 Mercury Systems, Inc.

December 7, 2020 EX-99.1

Mercury Systems to Acquire Physical Optics Corporation

FOR IMMEDIATE RELEASE News Release Mercury Systems to Acquire Physical Optics Corporation •Continues to scale Mercury’s global avionics & mission systems business •Complementary capabilities enhance position at forefront of military digital convergence •Expands platform and mission management content on new and existing airborne platforms •Broadens mission processing capabilities, adding data transfer and recording solutions •Leverages investments in embedded security and safety-certifiable avionics processing ANDOVER, Mass.

December 7, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): December 7, 2020 Mercury Systems, Inc.

November 12, 2020 S-8

- S-8 ESPP

As filed with the Securities and Exchange Commission on November 12, 2020 Registration No.

November 12, 2020 S-8

- S-8

As filed with the Securities and Exchange Commission on November 12, 2020 Registration No.

November 12, 2020 S-8 POS

- S-8 POS

As filed with the Securities and Exchange Commission on November 12, 2020 Registration No.

November 10, 2020 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended October 2, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER: 0-23599 MERCURY SYSTEMS, INC.

November 3, 2020 EX-99.2

1ST QUARTER FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 3, 2020, 5:00 pm ET Conference call: Dial (877) 303-6977 in the U.S. and Canada, (760) 298-5079 in all other countr

EX-99.2 3 a2021q1earningspresentat.htm EX-99.2 1ST QUARTER FISCAL YEAR 2021 FINANCIAL RESULTS Mark Aslett President and CEO Michael Ruppert Executive Vice President and CFO November 3, 2020, 5:00 pm ET Conference call: Dial (877) 303-6977 in the U.S. and Canada, (760) 298-5079 in all other countries Webcast login at www.mrcy.com/investor Webcast replay available by 7:00 p.m. ET November 3, 2020 Fo

November 3, 2020 EX-99.1

Mercury Systems Reports First Quarter Fiscal 2021 Results First Quarter Highlights Include: Revenue increased 16% over prior year with 12% organic growth Revenue, net income, adjusted EBITDA, EPS and adjusted EPS exceed guidance Backlog of $826 milli

EX-99.1 2 a2021q1earningsrelease.htm EX-99.1 Exhibit 99.1 News Release Mercury Systems Reports First Quarter Fiscal 2021 Results First Quarter Highlights Include: Revenue increased 16% over prior year with 12% organic growth Revenue, net income, adjusted EBITDA, EPS and adjusted EPS exceed guidance Backlog of $826 million increased 16% over prior year ANDOVER, Mass. November 3, 2020 Mercury System

November 3, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 3, 2020 Mercury Systems, Inc.

November 2, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): November 2, 2020 Mercury Systems, Inc.

September 14, 2020 S-3ASR

- S-3ASR

As filed with the Securities and Exchange Commission on September 14, 2020 Registration Statement No.

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