Qualys Inc
Ownership
Ownership Structure
Who owns Qualys Inc (QLYS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.2% of the shares are freely tradable; institutional investors hold 109.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.50 | 5,360,596 | -0.2 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 7.33 | 2,537,126 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.58 | 1,584,606 | +0.0 | 03/31/2026 |
| State Street Corp | 4.01 | 1,388,720 | +3.0 | 03/31/2026 |
| Geode Capital Management, LLC | 3.82 | 1,320,909 | +5.2 | 03/31/2026 |
| First Trust Advisors L.P. | 3.27 | 1,130,656 | +13.5 | 06/30/2026 |
| AQR Capital Management LLC | 3.00 | 1,038,928 | +64.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| L&G Cyber Security ETF | 3.74 | 1,292,648 | +0.0 | 08/31/2026 |
| iShares Core S&P Mid-Cap ETF | 3.57 | 1,234,330 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.25 | 1,125,131 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Thakar Sumedh S | CEO & PRESIDENT | 180,438 | 31,576,650 $ | Sep 14, 2026 | direct |
| Kim Joo Mi | CHIEF FINANCIAL OFFICER | 74,713 | 13,074,775 $ | Sep 2, 2026 | direct |
| Posey Bruce K | CHIEF LEGAL OFFICER | 59,554 | 10,421,950 $ | Aug 20, 2026 | direct |
| Pfeiffer Wendy | Director | 11,710 | 2,049,250 $ | Aug 20, 2026 | direct |
| Berquist Thomas | Director | 6,270 | 1,097,250 $ | Sep 2, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 500 | 173.92 | 86,960 |
| Sep 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 1,500 | 172.92 | 259,387 |
| Sep 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 300 | 162.43 | 48,729 |
| Sep 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 200 | 169.35 | 33,869 |
| Sep 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 100 | 174.71 | 17,471 |
| Sep 2, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 102 | 172.37 | 17,582 |
| Sep 2, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 265 | 171.14 | 45,353 |
| Sep 2, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 204 | 170.05 | 34,690 |
| Sep 2, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 166 | 168.75 | 28,013 |
| Sep 2, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 293 | 167.49 | 49,074 |
| Sep 2, 2026 | Berquist Thomas | Director | Sell | 511 | 175.27 | 89,563 |
| Aug 20, 2026 | Pfeiffer Wendy | Director | Sell | 500 | 185.00 | 92,500 |
| Aug 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 280 | 185.91 | 52,056 |
| Aug 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 96 | 184.25 | 17,688 |
| Aug 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 393 | 183.58 | 72,148 |
| Aug 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 97 | 181.99 | 17,653 |
| Aug 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 100 | 192.27 | 19,227 |
| Aug 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 600 | 190.49 | 114,295 |
| Aug 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 1,300 | 189.41 | 246,232 |
| Aug 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 794 | 188.07 | 149,326 |
| Aug 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 406 | 186.28 | 75,628 |
| Aug 3, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 827 | 154.51 | 127,779 |
| Aug 3, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 300 | 152.78 | 45,834 |
| Aug 3, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 200 | 151.47 | 30,294 |
| Aug 3, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Sell | 100 | 155.12 | 15,512 |
| Aug 1, 2026 | Kim Joo Mi | CHIEF FINANCIAL OFFICER | Other | 3,845 | 144.75 | 556,564 |
| Aug 1, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Other | 6,748 | 144.75 | 976,773 |
| Aug 1, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Other | 2,269 | 144.75 | 328,438 |
| Jul 20, 2026 | Pfeiffer Wendy | Director | Sell | 500 | 158.19 | 79,095 |
| Jul 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 43 | 160.18 | 6,888 |
| Jul 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 262 | 159.35 | 41,749 |
| Jul 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 334 | 158.06 | 52,791 |
| Jul 20, 2026 | Posey Bruce K | CHIEF LEGAL OFFICER | Sell | 243 | 156.71 | 38,081 |
| Jul 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 1,570 | 161.69 | 253,861 |
| Jul 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 730 | 160.81 | 117,395 |
| Jul 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 200 | 163.57 | 32,713 |
| Jul 14, 2026 | Thakar Sumedh S | CEO & PRESIDENT | Sell | 100 | 155.30 | 15,530 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.