Qualys, Inc. (QLYS) ownership: Top institutional holder: VANGUARD GROUP INC ($580.16M). Insider activity: Net Seller (0 buys, 20 sells). 5 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 4365407.00 | $580.16M | 2025-12-31 |
| BlackRock, Inc. | 5360596.00 | $470.93M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2537126.00 | $222.89M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1584606.00 | $139.21M | 2026-03-31 |
| STATE STREET CORP | 1388720.00 | $122.00M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1320909.00 | $116.06M | 2026-03-31 |
| AQR CAPITAL MANAGEMENT LLC | 1038928.00 | $90.84M | 2026-03-31 |
| Legal & General Group Plc | 1029587.00 | $90.45M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-11 | |
| Sell | null | 2026-06-11 | |
| Sell | null | 2026-06-10 | |
| Sell | null | 2026-06-10 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.