SEC Form 4 reporting owner

Thakar Sumedh S

Thakar Sumedh S has filed 49 Form 4 transactions reported between December 15, 2025 and September 14, 2026, as CEO & PRESIDENT of QUALYS, INC..

Name as filed: Thakar Sumedh S

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$8.9M

37 lines

Companies

with Form 4 filings

Latest transaction

Sep 14, 2026

transaction date

Roles and reported holdings

QLYSQUALYS, INC.
Dec 15, 2025 – Sep 14, 2026
CEO & PRESIDENT
Held directly180,438 sh as of Sep 14, 2026 · Form 4
24 months: $8.9M sold

Transaction history

All 49 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	500	$173.92	$87K@ $173.92	180,438	Form 4
Sep 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,500	$172.92	$259K@ $172.92	180,938	Form 4
Sep 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	300	$162.43	$49K@ $162.43	182,938	Form 4
Sep 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$159.28	$32K@ $159.28	183,238	Form 4
Sep 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	100	$154.39	$15K@ $154.39	183,438	Form 4
Aug 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	100	$192.27	$19K@ $192.27	183,538	Form 4
Aug 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	600	$190.49	$114K@ $190.49	183,638	Form 4
Aug 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,300	$189.41	$246K@ $189.41	184,238	Form 4
Aug 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	794	$188.07	$149K@ $188.07	185,538	Form 4
Aug 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	406	$186.28	$76K@ $186.28	186,332	Form 4
Aug 1, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	6,748	$144.75	$977K@ $144.75	186,738	Form 4
Jul 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,570	$161.69	$254K@ $161.69	193,886	Form 4
Jul 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	730	$160.81	$117K@ $160.81	195,456	Form 4
Jul 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$157.75	$32K@ $157.75	196,186	Form 4
Jul 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	100	$149.30	$15K@ $149.30	196,586	Form 4
Jun 30, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	10,000	$130.00	$1.3M@ $130.00	216,686	Form 4
Jun 29, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	2,306	$127.66	$294K@ $127.66	226,686	Form 4
Jun 29, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	4,994	$126.96	$634K@ $126.96	228,992	Form 4
Jun 29, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	2,700	$125.60	$339K@ $125.60	233,986	Form 4
Jun 26, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$121.10	$24K@ $121.10	236,686	Form 4
Jun 26, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	9,800	$120.47	$1.2M@ $120.47	236,886	Form 4
Jun 15, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,500	$114.31	$171K@ $114.31	248,186	Form 4
Jun 15, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$112.08	$22K@ $112.08	249,686	Form 4
Jun 1, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	39	$115.57	$5K@ $115.57	249,886	Form 4
Jun 1, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	10,861	$114.97	$1.2M@ $114.97	249,925	Form 4
Jun 1, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,700	$113.95	$194K@ $113.95	260,786	Form 4
Jun 1, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	600	$112.46	$67K@ $112.46	262,486	Form 4
May 1, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	6,748	$88.53	$597K@ $88.53	263,086	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	205	$127.52	$26K@ $127.52	269,641	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Grant or awardCode A · direct	401	—	—	269,846	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	7,726	$127.52	$985K@ $127.52	269,445	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Grant or awardCode A · direct	15,184	—	—	277,171	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	10,168	$127.52	$1.3M@ $127.52	261,987	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Grant or awardCode A · direct	19,984	—	—	272,155	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	10,394	$127.52	$1.3M@ $127.52	252,171	Form 4
Feb 3, 2026	QLYSCEO & PRESIDENT	Grant or awardCode A · direct	20,427	—	—	262,565	Form 4
Feb 1, 2026	QLYSCEO & PRESIDENT	Shares withheld for tax or exercise priceCode F · direct	5,662	$131.90	$747K@ $131.90	242,138	Form 4
Jan 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$134.75	$27K@ $134.75	247,800	Form 4
Jan 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	3,200	$134.21	$429K@ $134.21	248,000	Form 4
Jan 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,200	$133.01	$160K@ $133.01	251,200	Form 4
Jan 14, 2026	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	400	$131.98	$53K@ $131.98	252,400	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	600	$151.94	$91K@ $151.94	252,800	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	200	$150.10	$30K@ $150.10	253,400	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	357	$149.54	$53K@ $149.54	253,600	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,243	$148.33	$184K@ $148.33	253,957	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	1,400	$147.16	$206K@ $147.16	255,200	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	2,100	$146.33	$307K@ $146.33	256,600	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Open-market saleCode S · direct	2,600	$145.49	$378K@ $145.49	258,700	Form 4
Dec 15, 2025	QLYSCEO & PRESIDENT	Option exerciseCode M · direct	6,500	$25.56	$166K@ $25.56	261,300	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.