What does CUSIP 589378108 represent in this 13F holders report?

CUSIP 589378108 is the security identifier for MRCY - MERCURY SYSTEMS INC - COMMON STOCK used to aggregate holder disclosures.

How many institutions held MRCY - MERCURY SYSTEMS INC - COMMON STOCK in Q4 2020?

266 institutional investors reported MRCY - MERCURY SYSTEMS INC - COMMON STOCK for Q4 2020. Use the holders table for investor-level position and value details.

MERCURY SYSTEMS INC - COMMON STOCK (MRCY)

CUSIP: 589378108

Q4 2020 13F Holders as of 31 Dec 2020

Security type / class: Equity / COMMON STOCK
Shares outstanding: 60,401,859
Total 13F shares: 53,759,295
Share change: -184,977
Total reported value: $4,732,447,668
Put/Call ratio: 63%
Reported price per share: $88.06
Number of holders: 266
Value change: -$10,717,008
Number of buys: 116
Number of sells: 143

Security key

589378108

Report period

Q4 2020

Institutions

266

Top holders

MRCY full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2021 Previous quarter: Q3 2020 MERCURY SYSTEMS INC SEC filings MERCURY SYSTEMS INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 589378108

Newer quarter: Q1 2021 Previous quarter: Q3 2020

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top shareholders of MRCY - MERCURY SYSTEMS INC - COMMON STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

BlackRock Finance, Inc.

13D/G signal

—

Evidence rows

Latest as of

30 Sep 2020

13F Lead comparable stake: 12% Showing first 8 of 50 holder rows. Open remaining rows

Rank 1 holder

BlackRock Finance, Inc.

13F

Ownership: 12%
Position: $557.65M

13F

Rank 2 holder

VANGUARD GROUP INC

13F

Ownership: 8%
Position: $376.29M

13F

Rank 3 holder

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

13F

Ownership: 4.6%
Position: $213.93M

13F

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock Finance, Inc.	13F Company 13F	12%	$557,651,000 7,199,207 shares	—	30 Sep 2020
VANGUARD GROUP INC	13F Company 13F	8%	$376,287,000 4,857,817 shares	—	30 Sep 2020
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	13F Company 13F	4.6%	$213,933,000 2,761,855 shares	—	30 Sep 2020
FRED ALGER MANAGEMENT, LLC	13F Company 13F	4.2%	$195,293,000 2,521,212 shares	—	30 Sep 2020
FEDERATED HERMES, INC.	13F Company 13F	4%	$189,081,000 2,441,017 shares	—	30 Sep 2020
FRANKLIN RESOURCES INC	13F Company 13F	3.6%	$169,155,000 2,183,770 shares	—	30 Sep 2020
Conestoga Capital Advisors, LLC	13F Company 13F	3.2%	$149,239,000 1,926,665 shares	—	30 Sep 2020
STATE STREET CORP	13F Company 13F	3.1%	$144,101,000 1,860,327 shares	—	30 Sep 2020

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Bank of New York Mellon Corp	13F Company 13F	2.5%	$118,494,000 1,529,741 shares	—	30 Sep 2020
WELLS FARGO & COMPANY/MN	13F Company 13F	2.5%	$117,655,000 1,518,896 shares	—	30 Sep 2020
VICTORY CAPITAL MANAGEMENT INC	13F Company 13F	2.2%	$104,699,000 1,351,655 shares	—	30 Sep 2020
BAMCO INC /NY/	13F Company 13F	2%	$95,322,000 1,230,600 shares	—	30 Sep 2020
Invesco Ltd.	13F Company 13F	1.8%	$85,471,000 1,103,416 shares	—	30 Sep 2020
WADDELL & REED FINANCIAL INC	13F Company 13F	1.6%	$76,879,000 992,495 shares	—	30 Sep 2020
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	1.5%	$69,219,000 893,579 shares	—	30 Sep 2020
ALLIANCEBERNSTEIN L.P.	13F Company 13F	1.4%	$67,760,000 874,777 shares	—	30 Sep 2020
BLAIR WILLIAM & CO/IL	13F Company 13F	1.1%	$52,431,000 676,884 shares	—	30 Sep 2020
Stephens Investment Management Group LLC	13F Company 13F	1.1%	$52,096,000 672,557 shares	—	30 Sep 2020
LOOMIS SAYLES & CO L P	13F Company 13F	1.1%	$51,753,000 668,120 shares	—	30 Sep 2020
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	1.1%	$50,911,000 657,262 shares	—	30 Sep 2020
Nuveen Asset Management, LLC	13F Company 13F	1%	$47,590,000 614,380 shares	—	30 Sep 2020
AMERICAN CENTURY COMPANIES INC	13F Company 13F	1%	$46,755,000 603,608 shares	—	30 Sep 2020
BANK OF AMERICA CORP /DE/	13F Company 13F	0.9%	$42,298,000 546,068 shares	—	30 Sep 2020
EATON VANCE MANAGEMENT	13F Company 13F	0.87%	$40,595,000 524,071 shares	—	30 Sep 2020
NORGES BANK	13F Company 13F	0.85%	$39,953,000 515,792 shares	—	30 Sep 2020
Baird Financial Group, Inc.	13F Company 13F	0.79%	$37,029,000 478,037 shares	—	30 Sep 2020
Aberdeen Group plc	13F Company 13F	0.76%	$35,740,000 461,036 shares	—	30 Sep 2020
NORTHERN TRUST CORP	13F Company 13F	0.75%	$35,269,000 455,317 shares	—	30 Sep 2020
Aristotle Capital Boston, LLC	13F Company 13F	0.75%	$34,947,000 451,156 shares	—	30 Sep 2020
Ranger Investment Management, L.P.	13F Company 13F	0.72%	$33,517,000 432,706 shares	—	30 Sep 2020
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.66%	$30,851,000 398,271 shares	—	30 Sep 2020
EMERALD ADVISERS, LLC	13F Company 13F	0.59%	$27,825,000 359,223 shares	—	30 Sep 2020
BROWN ADVISORY INC	13F Company 13F	0.56%	$26,131,000 337,345 shares	—	30 Sep 2020
EMERALD MUTUAL FUND ADVISERS TRUST	13F Company 13F	0.55%	$25,597,000 330,453 shares	—	30 Sep 2020
Neuberger Berman Group LLC	13F Company 13F	0.55%	$25,511,000 329,656 shares	—	30 Sep 2020
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	0.51%	$23,739,000 306,473 shares	—	30 Sep 2020
AMERIPRISE FINANCIAL INC	13F Company 13F	0.44%	$20,742,000 267,785 shares	—	30 Sep 2020
THRIVENT FINANCIAL FOR LUTHERANS	13F Company 13F	0.44%	$20,681,000 266,995 shares	—	30 Sep 2020
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F Company 13F	0.43%	$20,190,027 260,651 shares	—	30 Sep 2020
SNYDER CAPITAL MANAGEMENT L P	13F Company 13F	0.41%	$19,031,000 245,687 shares	—	30 Sep 2020
Allianz Asset Management GmbH	13F Company 13F	0.32%	$14,919,000 192,599 shares	—	30 Sep 2020
Redwood Investments, LLC	13F Company 13F	0.31%	$14,539,000 187,696 shares	—	30 Sep 2020
KENNEDY CAPITAL MANAGEMENT LLC	13F Company 13F	0.31%	$14,538,000 187,689 shares	—	30 Sep 2020
JPMORGAN CHASE & CO	13F Company 13F	0.31%	$14,648,000 186,398 shares	—	30 Sep 2020
Marshall Wace North America L.P.	13F Company 13F	0.29%	$13,796,000 178,116 shares	—	30 Sep 2020
CI INVESTMENTS INC.	13F Company 13F	0.28%	$13,287,000 171,533 shares	—	30 Sep 2020
PRINCIPAL FINANCIAL GROUP INC	13F Company 13F	0.28%	$13,039,000 168,329 shares	—	30 Sep 2020
GOLDMAN SACHS GROUP INC	13F Company 13F	0.27%	$12,822,000 165,541 shares	—	30 Sep 2020
PUTNAM INVESTMENTS LLC	13F Company 13F	0.27%	$12,742,000 164,500 shares	—	30 Sep 2020
WCM INVESTMENT MANAGEMENT, LLC	13F Company 13F	0.27%	$12,557,000 162,108 shares	—	30 Sep 2020

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2020

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

266

53,759,295

Rows loaded

267

Investor	Option	Weight %	Change %	Reported value	* Price	Shares	Share Change	Activity	Report Period

^* Reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that failed the local validity check.

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

272

Q4 2020 holders

266

Holder diff

-6

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 value	Q4 2020 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend