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
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
- Public ticker
- QLYS on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, 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
-
50 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
-
20 Aug 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
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
20 Aug 2026
13F
13D/G
3/4/5
Lead comparable stake: 14%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
50 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 5
BlackRock, Inc.
14%
VANGUARD PORTFOLIO MANAGEMENT LLC
7.2%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
Sumedh S. Thakar
0.51%
Joo Mi Kim
0.21%
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. |
13F
13D/G
Company
|
14%
from 13D/G
|
$792,316,482
5,762,721 shares
|
— | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
7.2%
from 13D/G
|
$370,664,928
2,695,941 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Capital Management
|
5.2%
from 13D/G
|
$218,654,747
1,590,332 shares
|
— | 30 Jun 2026 |
| Sumedh S. Thakar |
3/4/5
CEO & PRESIDENT, Director
|
0.51%
|
$36,618,852
183,538 shares
mixed-class rows
|
-$15,199,865 | 14 Aug 2026 |
| Joo Mi Kim |
3/4/5
CHIEF FINANCIAL OFFICER
|
0.21%
|
$11,749,254
75,743 shares
|
-$6,327,082 | 03 Aug 2026 |
| Bruce K. Posey |
3/4/5
CHIEF LEGAL OFFICER
|
0.17%
|
$11,071,910
59,554 shares
|
-$1,979,401 | 20 Aug 2026 |
| Jeffrey P. Hank |
3/4/5
Director
|
0.04%
|
$1,887,762
15,576 shares
mixed-class rows
|
-$103,226 | 11 Jun 2026 |
| Wendy Pfeiffer |
3/4/5
Director
|
0.03%
|
$2,166,350
11,710 shares
|
-$277,475 | 20 Aug 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: -$25,227,308.
Buys
$0
Insiders: 0
Sells
$25,227,308
Insiders: 8
Net
-$25,227,308
Shares: -187,578
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 187,578
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 83,915 | $0 | $11,058,406 | -$11,058,406 |
| 3-6 | 0 | 5,041 | $0 | $505,211 | -$505,211 |
| 6-9 | 0 | 51,357 | $0 | $7,221,616 | -$7,221,616 |
| 9-12 | 0 | 47,265 | $0 | $6,442,074 | -$6,442,074 |
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
-$25,227,306
Latest report
20 Aug 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 | $36,618,852 | -$15,199,865 | -29% | Mixed | 14 Aug 2026 |
| Joo Mi Kim | Chief Financial Officer | $11,749,254 | -$6,327,082 | -35% | Filing P/S | 03 Aug 2026 |
| Bruce K. Posey | Chief Legal Officer | $11,071,910 | -$1,979,401 | -15% | Filing P/S | 20 Aug 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 | ||
| Kristi Marie Rogers | Director | $986,028 | -$228,998 | -19% | Mixed | 10 Jun 2026 |
| Thomas Berquist | Director | $750,995 | -$172,135 | -19% | Filing P/S | 12 Jun 2026 |
| John A. Zangardi | Director | $588,946 | -$939,124 | -61% | 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 | 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 |
| Bruce K. Posey | QLYS | Common Stock | Sale | -0.14% | $10,018 | $100.18 | -100 | 71,020 | 05 Mar 2026 | Direct |
| Bruce K. Posey | QLYS | Common Stock | Sale | -0.67% | $49,950 | $103.85 | -481 | 71,120 | 20 Feb 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Sale | -7.14% | $873,369 | $128.46 | -6,799 | 88,489 | 04 Feb 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Tax liability | -7.17% | -7,038 | 91,086 | 03 Feb 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Award | 16.5% | 13,837 | 97,678 | 03 Feb 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Tax liability | -10.2% | -28,493 | 252,171 | 03 Feb 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Award | 25.3% | 55,996 | 277,171 | 03 Feb 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Tax liability | -5.16% | -3,645 | 66,968 | 03 Feb 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Award | 12.6% | 8,113 | 72,490 | 03 Feb 2026 | Direct | ||
| Joo Mi Kim | QLYS | Common Stock | Sale | -3.71% | $463,024 | $135.63 | -3,414 | 88,489 | 02 Feb 2026 | Direct |
| Joo Mi Kim | QLYS | Common Stock | Tax liability | -2.92% | -2,769 | 91,903 | 01 Feb 2026 | Direct | ||
| Sumedh S. Thakar | QLYS | Common Stock | Tax liability | -2.28% | -5,662 | 242,138 | 01 Feb 2026 | Direct | ||
| Bruce K. Posey | QLYS | Common Stock | Tax liability | -2.42% | -1,659 | 66,939 | 01 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.