How many institutional investors hold QLYS?

3 tracked institutional investors disclosed a position in QLYS (QUALYS INC) in their most recent 13F filing.

Who is the largest institutional holder of QLYS?

Izzy Englander, Millennium Management, holds the largest disclosed position in QLYS, valued at $33M.

Where does this QLYS 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.

QLYS — QUALYS INC

Name: QUALYS INC (QLYS) — 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

About QUALYS INC (QLYS)

QUALYS INC (QLYS) 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 $33M. Across recent filings, tracked investors recorded 1 new positions, 1 increased, 2 reduced, and 1 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in QLYS

/100

Mixed Activity

Added / Increased2

Reduced2

Exited1

BearishBullish

Crowded Trade Score™

How many top investors track QLYS

/100

Emerging Interest

3investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

QLYS Ownership Composition

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

Dominant Type

Other

100% of tracked value

Institutions

tracked investors

Total Reported

$41.5M

combined 13F value

Other100.0%

Other(3)

100.0%

Tracked investors reporting QLYS

Investor	Firm	Shares	Market value	% of portfolio	As of
Izzy Englander	Millennium Management	235.4K	$20.7M	0.01%	Mar 31, 2026
Ken Griffin	Citadel Advisors	226.6K	$19.9M	0.00%	Mar 31, 2026
Ray Dalio	Bridgewater Associates	10.2K	$897.7K	0.00%	Mar 31, 2026

Izzy EnglanderMar 31, 2026
Millennium Management
Shares
235.4K
Value
$20.7M
% Portfolio
0.01%
Ken GriffinMar 31, 2026
Citadel Advisors
Shares
226.6K
Value
$19.9M
% Portfolio
0.00%
Ray DalioMar 31, 2026
Bridgewater Associates
Shares
10.2K
Value
$897.7K
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Ken Griffin	Sold	-100.00%	$0	May 15, 2026
Ray Dalio	Reduced	-56.71%	$897.7K	May 15, 2026
Ken Griffin	Reduced	-37.64%	$7.1K	Feb 17, 2026
Ray Dalio	Increased	58.22%	$3.1K	Feb 13, 2026
Ray Dalio	New	—	$2K	Nov 13, 2025

Ken Griffin
Sold
$0(-100.00%)May 15, 2026
Ray Dalio
Reduced
$897.7K(-56.71%)May 15, 2026
Ken Griffin
Reduced
$7.1K(-37.64%)Feb 17, 2026
Ray Dalio
Increased
$3.1K(58.22%)Feb 13, 2026
Ray Dalio
New
$2KNov 13, 2025

Frequently asked questions

How many institutional investors hold QLYS?: 3 tracked institutional investors disclosed a position in QLYS (QUALYS INC) in their most recent 13F filing.
Who is the largest institutional holder of QLYS?: Izzy Englander, Millennium Management, holds the largest disclosed position in QLYS, valued at $33M.
Did institutional ownership of QLYS increase or decrease?: Across recent 13F filings, tracked investors recorded 1 new positions, 1 increased, 2 reduced, and 1 fully exited QLYS.
Where does this QLYS 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.