Institutional shares held 36.5 Million
134K calls
21.4K puts
Total value of holdings $5.24B
$19.3M calls
$3.07M puts
Market Cap $5.51B
38,363,600 Shares Out.
Institutional ownership 95.2%
# of Institutions 483


Latest Institutional Activity in QLYS

Top Purchases

Q3 2025
Adviser Investments LLC Shares Held: 611K ($87.7M)
Q3 2025
Alyeska Investment Group, L.P. Shares Held: 347K ($49.7M)
Q3 2025
Fundsmith LLP Shares Held: 871K ($125M)
Q3 2025
Vanguard Group Inc Shares Held: 4.4M ($632M)
Q3 2025
Renaissance Technologies LLC Shares Held: 456K ($65.4M)

Top Sells

Q3 2025
Morgan Stanley Shares Held: 732K ($105M)
Q3 2025
Voloridge Investment Management, LLC Shares Held: 15.9K ($2.28M)
Q3 2025
Millennium Management LLC Shares Held: 128K ($18.3M)
Q3 2025
Tudor Investment Corp Et Al Shares Held: 60.9K ($8.75M)
Q3 2025
Algert Global LLC Shares Held: 21.2K ($3.04M)

About QLYS

Qualys, Inc. provides cloud-based information technology (IT), security, and compliance solutions in the United States and internationally. The company offers Qualys Cloud Apps, which includes Vulnerability Management; Vulnerability Management, Detection and Response; Threat Protection; Continuous Monitoring; Patch Management; Multi-Vector Endpoint Detection and Response; Certificate Assessment; SaaS Detection and Response; Secure Enterprise Mobility; Policy Compliance; Security Configuration Assessment; PCI Compliance; File Integrity Monitoring; Security Assessment Questionnaire; Out of-Band Configuration Assessment; Web Application Scanning; Web Application Firewall; Global Asset Inventory; Cybersecurity Asset Management; Certificate Inventory; Cloud Inventory; Cloud Security Assessment; and Container Security. Its integrated suite of IT, security, and compliance solutions delivered on its Qualys Cloud Platform enables customers to identify and manage IT assets, collect and analyze IT security data, discover and prioritize vulnerabilities, recommend and implement remediation actions, and verify the implementation of such actions. The company also provides asset tagging and management, reporting and dashboards, questionnaires and collaboration, remediation and workflow, big data correlation and analytics engine, and alerts and notifications, which enable integrated workflows, management and real-time analysis, and reporting across IT, security, and compliance solutions. The company offers its solutions through its sales teams, as well as through its network of channel partners, such as security consulting organizations, managed service providers, resellers, and consulting firms. It serves enterprises, government entities, and small and medium-sized businesses in various industries, including education, financial services, government, healthcare, insurance, manufacturing, media, retail, technology, and utilities. The company was incorporated in 1999 and is headquartered in Foster City, California.


Insider Transactions at QLYS

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
294K Shares
From 11 Insiders
Grant, award, or other acquisition 209K shares
Exercise of conversion of derivative security 84.5K shares
Sell / Disposition
263K Shares
From 11 Insiders
Payment of exercise price or tax liability 87.7K shares
Open market or private sale 175K shares

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