Qualys Inc (QLYS) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 15, 2026.
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- Filings shown
- 17
- Open-market buys
- 0
- Open-market sells
- 57
Counts cover the 17 most recent Form 4 filings Tradune holds for QLYS (filed Jul 6 – Oct 15, 2026); the score below covers only the trailing 90 days (0 buys, 42 sells). No completed check of QLYS's Form 4 list on SEC EDGAR is on record yet; the latest QLYS filing Tradune holds was filed Oct 15, 2026. This is not guaranteed to be the complete record — see QLYS's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 12 filings Tradune holds for QLYS filed Aug 3 – Oct 15, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
42 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 42 sales· 15,000 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Sumedh S. ThakarCEO & PRESIDENT | 0 | 20 | — | 9,600 | −$1,758,008 |
| Joo Mi KimCHIEF FINANCIAL OFFICER | 0 | 11 | — | 2,657 | −$423,707 |
| Bruce K. PoseyCHIEF LEGAL OFFICER | 0 | 9 | — | 1,732 | −$314,986 |
| Thomas BerquistDirector | 0 | 1 | — | 511 | −$89,563 |
| Wendy PfeifferDirector | 0 | 1 | — | 500 | −$92,500 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at QLYS
No open-market insider purchases (Form 4 code P) were reported for QLYS between Jul 6, 2026 and Oct 15, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 400 | $194.30 | 177,138 | −0.2% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 500 | $192.84 | 177,538 | −0.3% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 1,500 | $189.20 | 178,438 | −0.8% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $188.03 | 179,938 | −0.2% | Oct 14, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $189.99 | 178,038 | −0.2% | Oct 14, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 72 | $175.54 | 59,482 | −0.1% | Sep 21, 2026 |
| Open-market sale 10b5-1 box checked | 27 | $177.98 | 59,455 | −0.0% | Sep 21, 2026 |
| Open-market sale 10b5-1 box checked | 241 | $178.96 | 59,214 | −0.4% | Sep 21, 2026 |
| Open-market sale 10b5-1 box checked | 327 | $179.95 | 58,887 | −0.6% | Sep 21, 2026 |
| Open-market sale 10b5-1 box checked | 199 | $181.03 | 58,688 | −0.3% | Sep 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 200 | $169.35 | 182,538 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $170.90 | 182,438 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 1,500 | $172.92 | 180,938 | −0.8% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 500 | $173.92 | 180,438 | −0.3% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $174.71 | 180,338 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $154.39 | 183,438 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 200 | $159.28 | 183,238 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 300 | $162.43 | 182,938 | −0.2% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $165.94 | 182,838 | −0.1% | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $167.58 | 182,738 | −0.1% | Sep 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 102 | $172.37 | 74,713 | −0.1% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 293 | $167.49 | 75,450 | −0.4% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 166 | $168.75 | 75,284 | −0.2% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 204 | $170.05 | 75,080 | −0.3% | Sep 2, 2026 |
| Open-market sale 10b5-1 box checked | 265 | $171.14 | 74,815 | −0.4% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 511 | $175.27 | 6,270 | −7.5% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 500 | $185.00 | 11,710 | −4.1% | Aug 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 97 | $181.99 | 60,323 | −0.2% | Aug 20, 2026 |
| Open-market sale 10b5-1 box checked | 393 | $183.58 | 59,930 | −0.7% | Aug 20, 2026 |
| Open-market sale 10b5-1 box checked | 96 | $184.25 | 59,834 | −0.2% | Aug 20, 2026 |
| Open-market sale 10b5-1 box checked | 280 | $185.91 | 59,554 | −0.5% | Aug 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 100 | $192.27 | 183,538 | −0.1% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 406 | $186.28 | 186,332 | −0.2% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 794 | $188.07 | 185,538 | −0.4% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 1,300 | $189.41 | 184,238 | −0.7% | Aug 14, 2026 |
| Open-market sale 10b5-1 box checked | 600 | $190.49 | 183,638 | −0.3% | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 100 | $155.12 | 75,743 | −0.1% | Aug 3, 2026 |
| Open-market sale 10b5-1 box checked | 827 | $154.51 | 75,843 | −1.1% | Aug 3, 2026 |
| Open-market sale 10b5-1 box checked | 300 | $152.78 | 76,670 | −0.4% | Aug 3, 2026 |
| Open-market sale 10b5-1 box checked | 200 | $151.47 | 76,970 | −0.3% | Aug 3, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $148.54 | 77,170 | −0.1% | Aug 3, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $147.22 | 77,270 | −0.1% | Aug 3, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 3,845 | $144.75 | 77,370 | −4.7% | Aug 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 6,748 | $144.75 | 186,738 | −3.5% | Aug 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 2,269 | $144.75 | 60,420 | −3.6% | Aug 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 500 | $158.19 | 12,210 | −3.9% | Jul 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 334 | $158.06 | 62,994 | −0.5% | Jul 20, 2026 |
| Open-market sale 10b5-1 box checked | 262 | $159.35 | 62,732 | −0.4% | Jul 20, 2026 |
| Open-market sale 10b5-1 box checked | 43 | $160.18 | 62,689 | −0.1% | Jul 20, 2026 |
| Open-market sale 10b5-1 box checked | 243 | $156.71 | 63,328 | −0.4% | Jul 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 730 | $160.81 | 195,456 | −0.4% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 200 | $162.40 | 193,686 | −0.1% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 200 | $163.57 | 193,486 | −0.1% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $149.30 | 196,586 | −0.1% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 1,570 | $161.69 | 193,886 | −0.8% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $151.53 | 196,486 | −0.1% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 200 | $157.75 | 196,186 | −0.1% | Jul 14, 2026 |
| Open-market sale 10b5-1 box checked | 100 | $155.30 | 196,386 | −0.1% | Jul 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,000 | $155.00 | 63,571 | −1.5% | Jul 6, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 965 | $143.44 | 81,215 | −1.2% | Jul 2, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to QLYS's (Oct 15, 2026).
Frequently asked about QLYS insider activity
How many insiders bought QLYS stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of QLYS shares were reported by Qualys Inc insiders between Jul 6, 2026 and Oct 15, 2026. The 17 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for QLYS?
The most recent Form 4 on this page was filed by Sumedh S. Thakar (CEO & PRESIDENT) on Oct 15, 2026, reporting 5 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market QLYS insider sale shown?
The largest open-market sale among the filings shown was 1,500 QLYS shares at $189.20 (about $283,803) by Sumedh S. Thakar (CEO & PRESIDENT) on Oct 14, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track QLYS insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.