Stock Ownership/QLYS

QUALYS INC (QLYS): Ownership & Insider Activity

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

Reported Holders
20
13F filers
Aggregate Value
$609.6M
Across holders
Last Price
$178.46
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity11 increased9 reduced4 exited
Full exits: Bridgewater Associates, LP, Qube Research & Technologies Ltd, Fundsmith LLP, Walleye Capital LLC
Institutional Holders of QLYS
↗
20 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund1.39M$190.6M31.3%0.1%Added+$190.3MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund985K$135.5M22.2%0.1%Added+$21.0MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund763K$104.9M17.2%0.0%Added+$72.5MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund378K$52.0M8.5%0.0%Added+$49.9MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund286K$39.3M6.4%0.0%Added—Q2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund284K$39.1M6.4%0.1%Reduced$-29.4MQ2 2026
Fisher Asset Management, LLC
CIK 0000850529
Institutional Manager115K$15.8M2.6%0.0%Reduced$-172KQ2 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund76K$10.4M1.7%0.0%Reduced$-4.8MQ2 2026
Holocene Advisors, LP
CIK 0001700574
Hedge Fund35K$4.8M0.8%0.0%Added—Q2 2026
TUDOR INVESTMENT CORP ET AL
CIK 0000923093
Hedge Fund25K$3.5M0.6%0.0%Reduced+$1.3MQ2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$190.6M· 31.3% of total· 0.1% port· 1.39M sh· +$190.3M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$135.5M· 22.2% of total· 0.1% port· 985K sh· +$21.0M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$104.9M· 17.2% of total· 0.0% port· 763K sh· +$72.5M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$52.0M· 8.5% of total· 0.0% port· 378K sh· +$49.9M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$39.3M· 6.4% of total· 0.0% port· 286K sh· — QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$39.1M· 6.4% of total· 0.1% port· 284K sh· $-29.4M QoQ· Q2 2026
Fisher Asset Management, LLCReduced
Institutional Manager
$15.8M· 2.6% of total· 0.0% port· 115K sh· $-172K QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$10.4M· 1.7% of total· 0.0% port· 76K sh· $-4.8M QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$4.8M· 0.8% of total· 0.0% port· 35K sh· — QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALReduced
Hedge Fund
$3.5M· 0.6% of total· 0.0% port· 25K sh· +$1.3M QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$2.8M· 0.5% of total· 0.1% port· 21K sh· +$848K QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$2.7M· 0.4% of total· 0.0% port· 20K sh· +$156K QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$2.7M· 0.4% of total· 0.0% port· 19K sh· +$895K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$2.3M· 0.4% of total· 0.0% port· 17K sh· $-19.0M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$1.6M· 0.3% of total· 0.0% port· 12K sh· +$8K QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$726K· 0.1% of total· 0.0% port· 5K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$387K· 0.1% of total· 0.0% port· 3K sh· $-23K QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$318K· 0.1% of total· 0.0% port· 2K sh· $-17.2M QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCReduced
Hedge Fund
$254K· 0.0% of total· 0.0% port· 2K sh· $-190K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$21K· 0.0% of total· 0.0% port· 165 sh· — QoQ· Q2 2026
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