13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Electronic Components & AccessoriesBellwetherCompounder
MRCY

MERCURY SYS INC

375 institutions still hold MERCURY SYS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 589378108·Electronic Components & Accessories·375 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 9.9%
vs prior quarter
13F value held
$2.9B
58.0% inst. owned
of float
Holders
375
-63 QoQ
filers reporting
Activity
+8 / −55
+822 added · −648 reduced
this quarter
Concentration
22.61%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

375 institutions reported MRCY in Q1 2026. BlackRock, Inc. leads at 22.6% of the visible book. -63 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$650M8.9M0.01%Q1 202602
JANA Partners Management, LP
CIK 0001998597
$299M4.1M18.65%Q1 202603
STATE STREET CORP
CIK 0000093751
$282M3.9M0.01%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$212M2.9M0.01%Q1 202605
Invesco Ltd.
CIK 0000914208
$178M2.4M0.03%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$175M2.4M0.00%Q1 202607
Conestoga Capital Advisors, LLC
CIK 0001163744
$140M1.9M2.79%Q1 202608
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$111M1.5M0.01%Q1 202609
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$90M1.2M0.02%Q1 202610
GOLDMAN SACHS GROUP INC
CIK 0000886982
$88M1.2M0.01%Q1 202611
FIRST TRUST ADVISORS LP
CIK 0001125816· Index
$85M1.2M0.06%Q1 202612
AMERIPRISE FINANCIAL INC
CIK 0000820027
$72M992K0.02%Q1 202613
Fisher Asset Management, LLC
CIK 0000850529
$71M980K0.02%Q1 202614
SEGALL BRYANT & HAMILL, LLC
CIK 0001006378
$68M935K0.98%Q1 202615
Neuberger Berman Group LLC
CIK 0001465109
$66M910K0.05%Q1 202616
FMR LLC
CIK 0000315066
$66M904K0.00%Q1 202617
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
CIK 0001705339
$63M859K0.09%Q1 202618
RAYMOND JAMES FINANCIAL INC
CIK 0000720005
$56M794K0.02%Q1 202619
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$55M756K0.01%Q1 202620
MORGAN STANLEY
CIK 0000895421
$49M671K0.00%Q1 2026
Page 1 of 19
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