Stock Ownership/MRCY

MERCURY SYS INC (MRCY): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in MRCY · Industrials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
15
13F filers
Aggregate Value
$684.0M
Across holders
Last Price
$89.59
2026-08-24
Sector
Industrials
GICS
Quarterly fund activity8 increased7 reduced5 exited
Full exits: CITADEL ADVISORS LLC, Qube Research & Technologies Ltd, Squarepoint Ops LLC, CAPSTONE INVESTMENT ADVISORS, LLC, Ancora Advisors, LLC
Institutional Holders of MRCY
↗
15 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
JANA Partners Management, LP
CIK 0001998597
Hedge Fund3.96M$484.3M70.8%25.5%Added—Q2 2026
Fisher Asset Management, LLC
CIK 0000850529
Institutional Manager944K$115.5M16.9%0.0%Reduced$-4.4MQ2 2026
AXIOM INVESTORS LLC /DE
CIK 0001109147
Hedge Fund204K$25.0M3.7%0.2%Reduced$-812KQ2 2026
Select Equity Group, L.P.
CIK 0001592643
Hedge Fund165K$20.2M3.0%0.1%Added+$10.0MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund111K$13.5M2.0%0.0%Reduced$-4.2MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund72K$8.8M1.3%0.0%Reduced$-11.0MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund62K$7.6M1.1%0.0%Added$-39KQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund55K$6.3M0.9%0.0%Reduced+$6.3MQ2 2026
Brevan Howard Capital Management LP
CIK 0001512857
Hedge Fund9K$1.1M0.2%0.0%Added—Q2 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund7K$836K0.1%0.0%Added+$2KQ2 2026
JANA Partners Management, LPAdded
Hedge Fund
$484.3M· 70.8% of total· 25.5% port· 3.96M sh· — QoQ· Q2 2026
Fisher Asset Management, LLCReduced
Institutional Manager
$115.5M· 16.9% of total· 0.0% port· 944K sh· $-4.4M QoQ· Q2 2026
AXIOM INVESTORS LLC /DEReduced
Hedge Fund
$25.0M· 3.7% of total· 0.2% port· 204K sh· $-812K QoQ· Q2 2026
Select Equity Group, L.P.Added
Hedge Fund
$20.2M· 3.0% of total· 0.1% port· 165K sh· +$10.0M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$13.5M· 2.0% of total· 0.0% port· 111K sh· $-4.2M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$8.8M· 1.3% of total· 0.0% port· 72K sh· $-11.0M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$7.6M· 1.1% of total· 0.0% port· 62K sh· $-39K QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$6.3M· 0.9% of total· 0.0% port· 55K sh· +$6.3M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$1.1M· 0.2% of total· 0.0% port· 9K sh· — QoQ· Q2 2026
Gotham Asset Management, LLCAdded
Hedge Fund
$836K· 0.1% of total· 0.0% port· 7K sh· +$2K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$355K· 0.1% of total· 0.0% port· 3K sh· $-1.6M QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$226K· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$140K· 0.0% of total· 0.0% port· 1K sh· $-105K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$100K· 0.0% of total· 0.0% port· 821 sh· $-47K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$6K· 0.0% of total· 0.0% port· 52 sh· — QoQ· Q2 2026
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