Qualys CEO sells 3,200 shares under plan

Qualys’ CEO and President sold 3,200 common shares on September 14, 2026 under a pre-established Rule 10b5-1 trading plan at prices spanning the mid-$150s to mid-$170s.

Rhea-AI Filing Summary

QUALYS, INC. (QLYS) reported that CEO and President Sumedh S. Thakar, who is also a director, sold 3,200 shares of common stock on September 14, 2026. The sales, executed in multiple transactions at prices from $154.39 to $174.71 per share, were made pursuant to a Rule 10b5-1 trading plan adopted on February 27, 2026, with several trades reported at weighted average prices over disclosed price ranges.

Insider Trade Summary 10b5-1

Net Seller: 3,200 shares

Net Sell 10 txns

Insider Thakar Sumedh S

Role CEO & PRESIDENT

Sold 3,200 shs ($544K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	100	$154.39	$15K
Sale	Common Stock F1, F2	200	$159.275	$32K
Sale	Common Stock F1, F3	300	$162.43	$49K
Sale	Common Stock F1	100	$165.94	$17K
Sale	Common Stock F1	100	$167.58	$17K
Sale	Common Stock F1, F4	200	$169.345	$34K
Sale	Common Stock F1	100	$170.90	$17K
Sale	Common Stock F1, F5	1,500	$172.9247	$259K
Sale	Common Stock F1, F6	500	$173.92	$87K
Sale	Common Stock F1	100	$174.71	$17K

Holdings After Transaction: Common Stock — 180,338 shares (Direct)

Footnotes (6)

1. F1. The sale transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2026.
2. F2. The sale price represents the weighted average price of the shares sold ranging from $158.98 to $159.57 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
3. F3. The sale price represents the weighted average price of the shares sold ranging from $162.20 to $162.55 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
4. F4. The sale price represents the weighted average price of the shares sold ranging from $169.30 to $169.39 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
5. F5. The sale price represents the weighted average price of the shares sold ranging from $172.60 to $173.52 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
6. F6. The sale price represents the weighted average price of the shares sold ranging from $173.68 to $174.43 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

Key Figures

Total shares sold: 3,200 shares Number of sale transactions: 10 transactions Lowest reported sale price: $154.39 per share +3 more

6 metrics

Total shares sold 3,200 shares Non-derivative common stock sales on September 14, 2026

Number of sale transactions 10 transactions Reported non-derivative sales by the CEO on September 14, 2026

Lowest reported sale price $154.39 per share One of the sale transactions in Qualys common stock

Highest reported sale price $174.71 per share One of the sale transactions in Qualys common stock

Weighted average range example $158.98–$159.57 per share Price range underlying a weighted average sale price footnote (F2)

Rule 10b5-1 plan adoption date February 27, 2026 Trading plan under which the reported sales were effected

Key Terms

Rule 10b5-1 trading plan, weighted average price, Form 4

3 terms

Rule 10b5-1 trading plan regulatory

"The sale transaction ... was effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The sale price represents the weighted average price of the shares sold"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Form 4 regulatory

"The sale transaction reported in this Form 4 was effected pursuant"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Qualys (QLYS) disclose in this Form 4?

Qualys disclosed that CEO and President Sumedh S. Thakar, also a director, sold 3,200 shares of common stock on September 14, 2026 in a series of open-market or private sale transactions.

How many Qualys (QLYS) shares did the CEO sell and on what date?

The CEO sold a total of 3,200 shares of Qualys common stock on September 14, 2026, according to the Form 4 transaction summary.

At what prices were the Qualys (QLYS) shares sold in this Form 4?

Individual trades show prices from $154.39 to $174.71 per share. Several blocks report a weighted average price over ranges such as $158.98–$159.57, $162.20–$162.55, and $172.60–$173.52 per share.

Was the Qualys (QLYS) CEO’s share sale under a Rule 10b5-1 plan?

Yes. The filing states the sale transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 27, 2026, and the Form 4 trading-plan checkbox is affirmed.

How many separate sale transactions did the Qualys (QLYS) Form 4 report?

The Form 4 reports 10 separate sale transactions of Qualys common stock on September 14, 2026, all categorized as non-derivative sales in the open market or private transactions.

Do the weighted average prices in the Qualys (QLYS) Form 4 represent exact sale prices?

For several trades, the reported price is a weighted average over a stated range of prices. The reporting person notes they will provide full details of the number of shares sold at each separate price upon request.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/15/2026 - 08:22 PM Accepted by SEC EDGAR 09/15/2026 - 08:21 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Thakar Sumedh S

(Last) (First) (Middle)

C/O QUALYS, INC.

919 E. HILLSDALE BLVD.

(Street)

FOSTER CITY CALIFORNIA 94404

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
QUALYS, INC. [ QLYS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO & PRESIDENT

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/14/2026		S(1)		100	D	$154.39	183,438	D
Common Stock	09/14/2026		S(1)		200	D	$159.275(2)	183,238	D
Common Stock	09/14/2026		S(1)		300	D	$162.43(3)	182,938	D
Common Stock	09/14/2026		S(1)		100	D	$165.94	182,838	D
Common Stock	09/14/2026		S(1)		100	D	$167.58	182,738	D
Common Stock	09/14/2026		S(1)		200	D	$169.345(4)	182,538	D
Common Stock	09/14/2026		S(1)		100	D	$170.9	182,438	D
Common Stock	09/14/2026		S(1)		1,500	D	$172.9247(5)	180,938	D
Common Stock	09/14/2026		S(1)		500	D	$173.92(6)	180,438	D
Common Stock	09/14/2026		S(1)		100	D	$174.71	180,338	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2026.

2. The sale price represents the weighted average price of the shares sold ranging from $158.98 to $159.57 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

3. The sale price represents the weighted average price of the shares sold ranging from $162.20 to $162.55 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

4. The sale price represents the weighted average price of the shares sold ranging from $169.30 to $169.39 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

5. The sale price represents the weighted average price of the shares sold ranging from $172.60 to $173.52 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

6. The sale price represents the weighted average price of the shares sold ranging from $173.68 to $174.43 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

	/s/ Bruce Posey by power of attorney for Sumedh S. Thakar	09/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)