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Of the 13 tracked institutions holding QLYS, 8 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +2.9pt. It's a gauge of who owns the name, not just how many.
Among the 13 tracked institutional investors we monitor, QLYS (QUALYS INC) is held with a combined value of $1.40B across 13,676,474 shares. The largest holder is VANGUARD GROUP INC with a position worth $580.16M. 5 funds increased their holdings. 8 funds reduced their position.
Total Institutional Value
$1.40B
Total Shares Held
13,676,474
Institutional Holders
13
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $580.16M | 0.01% | -0.8% |
| 2 | BlackRock, Inc. | $470.93M | 0.01% | -0.2% |
| 3 | STATE STREET CORP | $122.00M | 0.00% | +3.0% |
| 4 | AQR CAPITAL MANAGEMENT LLC | $90.84M | 0.04% | +64.0% |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $43.71M | 0.07% | +3.6% |
| 6 | MILLENNIUM MANAGEMENT LLC | $20.68M | 0.01% | -4.1% |
| 7 | Fundsmith LLP | $19.86M | 0.15% | -65.1% |
| 8 | CITADEL ADVISORS LLC | $17.88M | 0.01% | +371.1% |
| 9 | Fisher Asset Management, LLC | $10.21M | 0.00% | -2.2% |
| 10 | PRICE T ROWE ASSOCIATES INC /MD/ | $9.99M | 0.00% | -36.7% |
| Member | Type | Date |
|---|---|---|
| Lisa McClain | Sell | Oct 31, 2025 |
| Lisa McClain | Sell | Oct 30, 2025 |
| Lisa McClain | Buy | Oct 30, 2025 |
| Lisa McClain | Buy |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of QLYS with a position worth $580.16M, representing 0.01% of their portfolio. In total, 13 institutional investors hold QLYS with a combined value of $1.40B.
Institutional investors hold $1.40B worth of QLYS stock across 13 positions. The largest institutional holder is VANGUARD GROUP INC with $580.16M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For QLYS, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their QLYS positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Sep 11, 2025 |
| Thomas H Tuberville | Sell | May 3, 2024 |
| Thomas H Tuberville | Buy | Apr 5, 2024 |
Last Close
$137.48
2026-07-24
YTD
+4.9%
70% of 52-week range
