How many institutional investors hold MRCY?

3 tracked institutional investors disclosed a position in MRCY (MERCURY SYS INC) in their most recent 13F filing.

Who is the largest institutional holder of MRCY?

Izzy Englander, Millennium Management, holds the largest disclosed position in MRCY, valued at $43M.

Where does this MRCY ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

MRCY — MERCURY SYS INC

Name: MERCURY SYS INC (MRCY) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying MRCY?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence

Institutional Conviction

Strong distribution · 0 buying vs 1 selling last quarter

Macro Tailwind

Macro conditions are mixed for this sector

Why? — Evidence & Confidence ▾

Of 1 tracked investors who changed their MRCY position last quarter, 0 bought and 1 sold (0% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 46/100 in a Overheat regime).

Supporting evidence

+3 tracked investors reported holding MRCY at their latest filing

Contradicting evidence — always shown

−1 tracked investor reduced or exited last quarter (0 reduced, 1 sold out)
−13F data is disclosed up to 45 days after quarter end — positions may have changed since

Know the limits

· 13F disclosure lag (up to 45 days)
· Tracked investors are a sample, not the whole market
· Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 10/21/2026.

About MERCURY SYS INC (MRCY)

MERCURY SYS INC (MRCY) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Izzy Englander (Millennium Management), valued at $43M. Across recent filings, tracked investors recorded 3 new positions, 0 increased, 1 reduced, and 2 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in MRCY

/100

Mixed Activity

Added / Increased3

Reduced1

Exited2

BearishBullish

Crowded Trade Score™

How many top investors track MRCY

/100

Emerging Interest

3investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

MRCY Ownership Composition

How MERCURY SYS INC is held across tracked investor types, based on reported 13F positions.

Dominant Type

Multi-Strategy / Quant

62% of tracked value

Institutions

tracked investors

Total Reported

$16.5M

combined 13F value

Multi-Strategy / Quant62.2%
Macro37.8%

Multi-Strategy / Quant(2)

62.2%

Macro(1)

37.8%

Tracked investors currently reporting MRCY

1 tracked investor has since exited this position — listed separately below.

Investor	Firm	Shares	Market value	% of portfolio	As of
Izzy Englander	Millennium Management	2.9K	$354.9K	0.00%	Jun 30, 2026
Ken Griffin	Citadel Advisors	80.8K	$9.9M	0.00%	Jun 30, 2026
Paul Tudor Jones	Tudor Investment Corp	50.8K	$6.2M	0.01%	Jun 30, 2026

Izzy EnglanderJun 30, 2026
Millennium Management
Shares
2.9K
Value
$354.9K
% Portfolio
0.00%
Ken GriffinJun 30, 2026
Citadel Advisors
Shares
80.8K
Value
$9.9M
% Portfolio
0.00%
Paul Tudor JonesJun 30, 2026
Tudor Investment Corp
Shares
50.8K
Value
$6.2M
% Portfolio
0.01%

Previously held MRCY

These investors reported MRCY in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.

Investor	Firm	Last reported shares	Value then	Last held
Ray Dalio	Bridgewater Associates	15.5K	$1.1M	Dec 31, 2025

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	New	—	$1.2M	May 15, 2026
Izzy Englander	Sold	-100.00%	$0	Aug 14, 2026
Ken Griffin	New	—	$15.9M	Nov 14, 2025
Ken Griffin	Reduced	-15.37%	$12.7M	Feb 17, 2026
Ray Dalio	New	—	$1.1M	Feb 13, 2026
Ray Dalio	Sold	-100.00%	$0	May 15, 2026

Izzy Englander
New
$1.2MMay 15, 2026
Izzy Englander
Sold
$0(-100.00%)Aug 14, 2026
Ken Griffin
New
$15.9MNov 14, 2025
Ken Griffin
Reduced
$12.7M(-15.37%)Feb 17, 2026
Ray Dalio
New
$1.1MFeb 13, 2026
Ray Dalio
Sold
$0(-100.00%)May 15, 2026

Frequently asked questions

How many institutional investors hold MRCY?: 3 tracked institutional investors disclosed a position in MRCY (MERCURY SYS INC) in their most recent 13F filing.
Who is the largest institutional holder of MRCY?: Izzy Englander, Millennium Management, holds the largest disclosed position in MRCY, valued at $43M.
Did institutional ownership of MRCY increase or decrease?: Across recent 13F filings, tracked investors recorded 3 new positions, 0 increased, 1 reduced, and 2 fully exited MRCY.
Where does this MRCY ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.