Qualys
QLYS · NASDAQ
Who owns QLYS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 50.7% of QLYS’s shares.
- BlackRock Institutional Trust Company, N.A.13.6%
- Vanguard Portfolio Management, LLC7.7%
- Vanguard Capital Management, LLC4.5%
- State Street Investment Management (US)4.1%
- Next 6 largest institutions20.8%
- All other shareholders49.3%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 4.77M | 13.55% |
| Vanguard Portfolio Management, LLC | 2.70M | 7.65% |
| Vanguard Capital Management, LLC | 1.59M | 4.52% |
| State Street Investment Management (US) | 1.46M | 4.13% |
| Legal & General Investment Management Ltd. | 1.44M | 4.08% |
| Geode Capital Management, L.L.C. | 1.41M | 4.00% |
| AQR Capital Management, LLC | 1.39M | 3.96% |
| First Trust Advisors L.P. | 1.13M | 3.21% |
| Arrowstreet Capital, Limited Partnership | 985.35K | 2.80% |
| Boston Trust Walden Company | 984.89K | 2.80% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| L&G Cyber Security UCITS ETF Fund | 1.29M | 3.67% |
| iShares Core S&P Mid-Cap ETF | 1.23M | 3.50% |
| Vanguard Total Stock Market Index Fund | 1.13M | 3.19% |
| iShares Russell 2000 ETF | 937.63K | 2.66% |
| Vanguard Information Technology Index Fund | 911.75K | 2.59% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $10.65M (86 trades) of QLYS on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Thakar Sumedh S | Sale | 400 | $77.72K |
| Thakar Sumedh S | Sale | 500 | $96.42K |
| Thakar Sumedh S | Sale | 400 | $75.99K |
| Thakar Sumedh S | Sale | 1.50K | $283.80K |
| Thakar Sumedh S | Sale | 400 | $75.21K |
| POSEY BRUCE K | Sale | 199 | $36.03K |
| POSEY BRUCE K | Sale | 327 | $58.84K |
| POSEY BRUCE K | Sale | 241 | $43.13K |
| POSEY BRUCE K | Sale | 27 | $4.81K |
| POSEY BRUCE K | Sale | 72 | $12.64K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Lisa McClainHouse | Sale | $1K–$15K | Oct 31, 2025 |
| Lisa McClainHouse | Sale | $1K–$15K | Oct 30, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.28M
- Days to cover
- 4.88
- % of shares outstanding
- 9.32%
- Average daily volume
- 673.12K
- Change since last report
- −5.2%
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