Comparable stake leader
BlackRock, Inc.
SEC ownership of QUALYS, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001107843.
Disclosed value leader
Philippe Courtot Family Trust
Comparable rows
3/50
Latest evidence
05 Nov 2026
- Public ticker
- QLYS on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
05 Nov 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001107843
- Issuer location
- Foster City, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of QUALYS, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
Philippe Courtot Family T...
Comparable rows
3/50
Latest evidence
05 Nov 2026
13D/G
13F
3/4/5
Lead comparable stake: 14%
47 rows are not safely comparable across share classes.
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
3 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 3
BlackRock, Inc.
14%
VANGUARD PORTFOLIO MANAGEMENT LLC
7.2%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
|
14%
Reported 13D/G
· 31 Mar 2025
|
$645,205,538
5,090,379 shares
|
-$97,398,249 | 31 Mar 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
7.2%
Reported 13D/G
· 31 Mar 2026
|
$419,336,798
2,240,047 shares
|
— | 30 Sep 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5.2%
Reported 13D/G
· 31 Mar 2026
|
$289,642,018
1,547,233 shares
|
— | 30 Sep 2026 |
| Philippe Courtot Family Trust |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$768,508,413
3,850,339 shares
|
— | 04 Nov 2021 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$267,305,126
1,427,912 shares
|
— | 30 Sep 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$263,460,930
1,407,218 shares
|
— | 30 Sep 2026 |
| FIRST TRUST ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$209,429,438
1,118,747 shares
|
— | 30 Sep 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
Company
|
—
denominator unverified
|
$186,348,053
995,449 shares
|
— | 30 Sep 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$22,174,891.
Buys
$0
Insiders: 0
Sells
$22,174,891
Insiders: 6
Net
-$22,174,891
Shares: -160,354
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 160,354
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 13,713 | $0 | $2,549,510 | -$2,549,510 |
| 3-6 | 0 | 87,425 | $0 | $11,295,048 | -$11,295,048 |
| 6-9 | 0 | 646 | $0 | $66,474 | -$66,474 |
| 9-12 | 0 | 58,570 | $0 | $8,263,859 | -$8,263,859 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to QUALYS, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Philippe Courtot Family Trust
Net 12M change
-$22.17M
Full value: -$22,174,891 · USD · 12-month changeLatest report
05 Nov 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Philippe Courtot Family Trust | 10%+ Owner | $768,508,413 | Mixed | 04 Nov 2021 | ||
| Sumedh S. Thakar | CEO & PRESIDENT, Director | $42,216,782 | -$12,595,115 | -23% | Mixed | 05 Nov 2026 |
| Joo Mi Kim | Chief Financial Officer | $17,669,246 | -$6,843,854 | -28% | Median | 05 Nov 2026 |
| Bruce K. Posey | Chief Legal Officer | $13,249,641 | -$2,161,664 | -14% | Median | 05 Nov 2026 |
| Allan Peters | Chief Revenue Officer | $8,952,634 | Mixed | 01 Mar 2023 | ||
| Sandra E. Bergeron | Director | $5,569,499 | Mixed | 08 Jun 2022 | ||
| Peter Pace | Director | $3,416,667 | Mixed | 07 Jun 2023 | ||
| Wendy Pfeiffer | Director | $2,166,350 | -$277,475 | -11% | Filing P/S | 20 Aug 2026 |
| Saikat Paul | Chief Accounting Officer | $2,061,018 | Mixed | 15 Feb 2022 | ||
| Jeffrey P. Hank | Director | $1,887,762 | -$103,226 | -5.2% | Mixed | 11 Jun 2026 |
| William Berutti | Director | $1,309,543 | Mixed | 07 Jun 2023 | ||
| Thomas Berquist | Director | $1,098,942 | -$193,557 | -15% | Filing P/S | 02 Sep 2026 |
| Kristi Marie Rogers | Director | $986,028 | Mixed | 10 Jun 2026 | ||
| John A. Zangardi | Director | $588,946 | Mixed | 10 Jun 2026 | ||
| Bradford L. Brooks | Director | $511,814 | Mixed | 10 Jun 2026 | ||
| Arjet Skenduli | Chief Accounting Officer | Mixed | 23 Feb 2022 |
Recent insider transactions for QUALYS, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Bruce K. Posey | QLYS | Common Stock | Award | 27.4% | 15,241 | 70,778 | 05 Nov 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Award | 38.4% | 26,179 | 94,387 | 05 Nov 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Award | 28.2% | 48,028 | 218,417 | 05 Nov 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Sale | -3.75% | -$557,485 | $209.66 | -2,659 | 68,208 | 02 Nov 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Tax liability | -5.15% | -3,846 | 70,867 | 01 Nov 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Tax liability | -3.93% | -2,270 | 55,537 | 01 Nov 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Tax liability | -3.81% | -6,749 | 170,389 | 01 Nov 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.5% | -$166,964 | $189.52 | -881 | 57,807 | 20 Oct 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -1.77% | -$609,148 | $190.36 | -3,200 | 177,138 | 14 Oct 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.45% | -$155,442 | $179.49 | -866 | 58,688 | 21 Sep 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -1.74% | -$544,152 | $170.05 | -3,200 | 180,338 | 14 Sep 2026 | Direct |
| Thomas Berquist | QLYS | Common Stock | Sale | -7.54% | -$89,563 | $175.27 | -511 | 6,270 | 02 Sep 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Sale | -1.36% | -$174,712 | $169.62 | -1,030 | 74,713 | 02 Sep 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.43% | -$159,544 | $184.23 | -866 | 59,554 | 20 Aug 2026 | Direct |
| Wendy Pfeiffer | QLYS | Common Stock | Sale | -4.1% | -$92,500 | $185.00 | -500 | 11,710 | 20 Aug 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -1.71% | -$604,708 | $188.97 | -3,200 | 183,538 | 14 Aug 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Sale | -2.1% | -$248,995 | $153.04 | -1,627 | 75,743 | 03 Aug 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Tax liability | -4.73% | -3,845 | 77,370 | 01 Aug 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Tax liability | -3.62% | -2,269 | 60,420 | 01 Aug 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Tax liability | -3.49% | -6,748 | 186,738 | 01 Aug 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.39% | -$139,508 | $158.17 | -882 | 62,689 | 20 Jul 2026 | Direct |
| Wendy Pfeiffer | QLYS | Common Stock | Sale | -3.93% | -$79,095 | $158.19 | -500 | 12,210 | 20 Jul 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -1.63% | -$513,611 | $160.50 | -3,200 | 193,486 | 14 Jul 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.55% | -$155,000 | $155.00 | -1,000 | 63,571 | 06 Jul 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Sale | -1.17% | -$138,420 | $143.44 | -965 | 81,215 | 02 Jul 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -13.2% | -$4,050,000 | $135.00 | -30,000 | 196,686 | 30 Jun 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -4.23% | -$1,267,538 | $126.75 | -10,000 | 226,686 | 29 Jun 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -4.05% | -$1,204,814 | $120.48 | -10,000 | 236,686 | 26 Jun 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.32% | -$94,668 | $109.44 | -865 | 64,571 | 22 Jun 2026 | Direct |
| Wendy Pfeiffer | QLYS | Common Stock | Sale | -3.79% | -$55,275 | $110.55 | -500 | 12,710 | 22 Jun 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -1.28% | -$367,369 | $114.80 | -3,200 | 246,686 | 15 Jun 2026 | Direct |
| Thomas Berquist | QLYS | Common Stock | Sale | -12.2% | -$103,994 | $110.75 | -939 | 6,781 | 12 Jun 2026 | Direct |
| Jeffrey P. Hank | QLYS | Common Stock | Sale | -2.93% | -$52,052 | $110.75 | -470 | 15,576 | 12 Jun 2026 | Direct |
| Jeffrey P. Hank | QLYS | Common Stock | Sale | -2.85% | -$51,174 | $108.88 | -470 | 16,046 | 11 Jun 2026 | Direct |
| John A. Zangardi | QLYS | Common Stock | Award | 64.6% | 2,628 | 6,699 | 10 Jun 2026 | Direct | ||
| Jeffrey P. Hank | QLYS | Common Stock | Award | 18.9% | 2,628 | 16,516 | 10 Jun 2026 | Direct | ||
| Kristi Marie Rogers | QLYS | Common Stock | Award | 30.6% | 2,628 | 11,224 | 10 Jun 2026 | Direct | ||
| Wendy Pfeiffer | QLYS | Common Stock | Award | 24.8% | 2,628 | 13,210 | 10 Jun 2026 | Direct | ||
| Bradford L. Brooks | QLYS | Common Stock | Award | 82.2% | 2,628 | 5,826 | 10 Jun 2026 | Direct | ||
| Thomas Berquist | QLYS | Common Stock | Award | 51.6% | 2,628 | 7,720 | 10 Jun 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Sale | -1.24% | -$115,128 | $111.67 | -1,031 | 82,180 | 02 Jun 2026 | Direct |
| Sumedh S. Thakar | QLYS | Common Stock | Sale | -5.02% | -$1,514,407 | $114.73 | -13,200 | 249,886 | 01 Jun 2026 | Direct |
| Wendy Pfeiffer | QLYS | Common Stock | Sale | -4.51% | -$50,605 | $101.21 | -500 | 10,582 | 22 May 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -1.3% | -$86,876 | $100.43 | -865 | 65,436 | 20 May 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -3.47% | -$238,835 | $100.18 | -2,384 | 66,301 | 19 May 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Sale | -1.92% | -$162,976 | $100.17 | -1,627 | 83,211 | 19 May 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Tax liability | -3.2% | -2,270 | 68,685 | 01 May 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Tax liability | -4.34% | -3,845 | 84,838 | 01 May 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Tax liability | -2.5% | -6,748 | 263,086 | 01 May 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Sale | -0.09% | -$6,506 | $100.09 | -65 | 70,955 | 13 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.