MERCURY SYS INC

Ticker: MRCY CUSIP: 589378108 Class: Common Stock

Note: Option positions (PUT/CALL) are excluded.

InstitutionSharesValue ($000)
BlackRock, Inc.8,611,638$628,736
VANGUARD GROUP INC5,632,049$411,196
JANA Partners Management, LP4,959,481$362,092
STATE STREET CORP3,423,600$249,957
Conestoga Capital Advisors, LLC2,174,807$158,783
Invesco Ltd.1,910,742$139,503
DIMENSIONAL FUND ADVISORS LP1,475,821$107,753
GEODE CAPITAL MANAGEMENT, LLC1,368,659$99,940
AMERIPRISE FINANCIAL INC1,289,685$94,160
FIRST TRUST ADVISORS LP1,279,384$93,408
GOLDMAN SACHS GROUP INC1,156,397$84,429
FMR LLC1,152,192$84,122
NEUBERGER BERMAN GROUP LLC1,030,103$75,247
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC984,273$71,862
PRICE T ROWE ASSOCIATES INC /MD/867,670$63
Fisher Asset Management, LLC860,383$62,817
LOOMIS SAYLES & CO L P851,817$62,191
BAMCO INC /NY/835,823$61,023
Allspring Global Investments Holdings, LLC753,695$57,303
SNYDER CAPITAL MANAGEMENT L P748,536$54,651
MORGAN STANLEY730,676$53,347
VAN ECK ASSOCIATES CORP725,387$53
RAYMOND JAMES FINANCIAL INC708,054$52,068
KENNEDY CAPITAL MANAGEMENT LLC670,489$48,952
ROYAL BANK OF CANADA644,132$47,028
CHARLES SCHWAB INVESTMENT MANAGEMENT INC636,624$46,480
SEGALL BRYANT & HAMILL, LLC636,526$46,473
LORD, ABBETT & CO. LLC615,808$45
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.598,624$43,706
EMERALD ADVISERS, LLC531,115$38,777
NORTHERN TRUST CORP517,783$37,803
Voya Investment Management LLC511,324$37,332
JENNISON ASSOCIATES LLC449,967$32,852
OBERWEIS ASSET MANAGEMENT INC/414,040$30,229
BESSEMER GROUP INC399,496$29
SEI INVESTMENTS CO378,357$27,624
Nuveen, LLC351,130$25,636
EMERALD MUTUAL FUND ADVISERS TRUST336,058$24,536
Bank of New York Mellon Corp322,300$23,531
DRIEHAUS CAPITAL MANAGEMENT LLC304,726$22,248
SILVERCREST ASSET MANAGEMENT GROUP LLC302,257$22,068
COMERICA BANK292,098$21,326
Aristotle Capital Boston, LLC279,317$20,393
MetLife Investment Management, LLC268,362$19,593
WCM INVESTMENT MANAGEMENT, LLC264,889$19,562
T. Rowe Price Investment Management, Inc.262,750$19
PRINCIPAL FINANCIAL GROUP INC262,294$19,150
UBS Group AG251,229$18,342
BANK OF AMERICA CORP /DE/246,737$18,014
AMERICAN CENTURY COMPANIES INC238,932$17,444
VICTORY CAPITAL MANAGEMENT INC227,533$16,612
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC219,363$16,016
FRANKLIN RESOURCES INC208,449$15,219
KING LUTHER CAPITAL MANAGEMENT CORP202,643$14,795
ROYCE & ASSOCIATES LP197,079$14,389
Man Group plc192,033$14,020
Penn Capital Management Company, LLC191,883$14,047
AXIOM INVESTORS LLC /DE183,144$13,371
Public Sector Pension Investment Board183,033$13,363
Freshford Capital Management, LLC182,425$13,319
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.178,681$13,045
PRUDENTIAL FINANCIAL INC166,138$12,130
BNP PARIBAS ARBITRAGE, SA164,463$12,007
STALEY CAPITAL ADVISERS INC161,100$11,762
Legal & General Group Plc160,874$11,745
TWO SIGMA INVESTMENTS, LP150,177$10,964
BARCLAYS PLC149,172$10,891
WELLS FARGO & COMPANY/MN148,989$10,878
Cinctive Capital Management LP147,444$10,765
Heights Point Management, LP143,068$10,445
RHUMBLINE ADVISERS142,339$10,392
PEREGRINE CAPITAL MANAGEMENT LLC142,178$10,380
NEW YORK STATE COMMON RETIREMENT FUND139,282$10,169
DEUTSCHE BANK AG\128,705$9,397
AGMAN CAPITAL LLC122,836$8,968
Vident Advisory, LLC121,888$8,899
CASTLEARK MANAGEMENT LLC118,458$8,649
UBS ASSET MANAGEMENT AMERICAS INC115,635$8,443
JPMORGAN CHASE & CO109,132$7,968
Swiss National Bank106,500$7,776
CITADEL ADVISORS LLC104,376$7,620
13D Management LLC103,762$7,576
Lisanti Capital Growth, LLC94,265$6,882
Russell Investments Group, Ltd.89,794$6,556
BLAIR WILLIAM & CO/IL83,772$6,116
Penserra Capital Management LLC80,565$6
Select Equity Group, L.P.77,821$5,682
Archon Capital Management LLC74,600$5,447
Connor, Clark & Lunn Investment Management Ltd.70,268$5,130
TUDOR INVESTMENT CORP ET AL69,178$5,051
INTECH INVESTMENT MANAGEMENT LLC67,627$4,937
DEEPWATER ASSET MANAGEMENT, LLC67,461$4,925
NORDEA INVESTMENT MANAGEMENT AB67,386$4,954
Quantinno Capital Management LP66,606$4,863
LPL Financial LLC64,423$4,704
Candelo Capital Management LP64,226$4,689
ALLIANCEBERNSTEIN L.P.60,816$4,440
NEW YORK STATE TEACHERS RETIREMENT SYSTEM59,911$4
Cerity Partners LLC59,556$4,348
D. E. Shaw & Co., Inc.58,555$4,275
244 other institutions2,518,079$165,606
Total (344 institutions)63,325,927$4,388,531