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Who owns Qualys (QLYS) stock

429 funds reported Qualys (QLYS) shares in their latest 13F filings, worth $5.4B in all. The largest holder is BlackRock ($792M). Last quarter 217 funds added to their stakes and 197 cut them. Members of Congress and other officials disclosed 1 trade (0 buys, 1 sales).

Largest holders of QLYS (13F)Largest holders of QLYS (13F)BlackRock$792MVanguard Group$580MVanguard Portfolio Management LLC$371MVanguard Capital Management LLC$219MState Street$200MLegal & General Group$198MGeode Capital Management, LLC$194MAQR Capital Management LLC$191MFirst Trust Advisors LP$155MBoston Trust Walden$147M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock5,762,721$792Mincrease2026-06-30
Vanguard Group4,365,407$580Mdecrease2025-12-31
Vanguard Portfolio Management LLC2,695,941$371Mincrease2026-06-30
Vanguard Capital Management LLC1,590,332$219Mincrease2026-06-30
State Street1,456,158$200Mincrease2026-06-30
Legal & General Group1,437,373$198Mincrease2026-06-30
Geode Capital Management, LLC1,409,583$194Mincrease2026-06-30
AQR Capital Management LLC1,394,771$191Mincrease2026-06-30
First Trust Advisors LP1,130,656$155Mincrease2026-06-30
Boston Trust Walden786,384$147Mdecrease2026-09-30
Arrowstreet Capital, Limited Partnership985,345$135Mincrease2026-06-30
Millennium Management LLC762,709$105Mincrease2026-06-30
Dimensional Fund Advisors LP719,248$98.9Mdecrease2026-06-30
Morgan Stanley620,705$85.3Mdecrease2026-06-30
Mirae Asset Global ETFS Holdings553,737$76.1Mincrease2026-06-30

Trades by Congress and other officials

DateWhoTradeAmount
2025-10-31Lisa McClainsale$1K–$15K

Qualys' latest quarter

Qualys, Q2 2026: revenue $182M (+11% year over year), operating margin 34.0%, net earnings $52.4M, operating cash flow $59.6M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most QLYS stock?

By the latest 13F filings: BlackRock ($792M); Vanguard Group ($580M); Vanguard Portfolio Management LLC ($371M); Vanguard Capital Management LLC ($219M); State Street ($200M).

Has Congress traded QLYS stock?

Officials disclosed 1 trade on file: 0 buys and 1 sales. The latest: Lisa McClain, sale on 2025-10-31.

What is the short interest in QLYS?

3,234,118 shares were sold short at the 2026-10-15 settlement, -1.53% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.