[Form 4] QUALYS, INC. Insider Trading Activity

Rhea-AI Filing Summary

Qualys, Inc. (QLYS) CEO and President Sumedh S. Thakar reported an option exercise and related share sales. On 11/14/2025 he exercised a stock option covering 6,500 shares of common stock at $25.56 per share. That same day he sold blocks of Qualys common stock totaling 8,500 shares at weighted average prices between about $140.71 and $143.83 per share, in several transactions. After these transactions, he directly owned 254,800 shares of Qualys common stock. The filing notes that the sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2025, which is designed to allow insiders to sell shares according to a set schedule.

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
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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 CA 94404

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

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

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

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

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	11/14/2025		M(1)		6,500	A	$25.56	263,300	D
Common Stock	11/14/2025		S(1)		1,422	D	$141.2415(2)	261,878	D
Common Stock	11/14/2025		S(1)		1,661	D	$142.1459(3)	260,217	D
Common Stock	11/14/2025		S(1)		5,117	D	$143.1849(4)	255,100	D
Common Stock	11/14/2025		S(1)		300	D	$143.7967(5)	254,800	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
Stock Option (right to buy)	$25.56	11/14/2025		M			6,500	(6)	04/28/2026	Common Stock	6,500	$0	6,500	D

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 26, 2025.

2. The sale price represents the weighted average price of the shares sold ranging from $140.71 to $141.70 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 $141.71 to $142.62 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 $142.73 to $143.71 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 $143.73 to $143.83 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 option is fully vested and immediately exercisable.

	/s/ Bruce Posey by power of attorney for Sumedh S. Thakar	11/17/2025
	** 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.

FAQ

What insider transaction did Qualys (QLYS) report for its CEO?

Qualys reported that CEO and President Sumedh S. Thakar exercised a stock option for 6,500 shares at $25.56 per share and sold multiple blocks of common stock totaling 8,500 shares on 11/14/2025.

At what prices did the Qualys (QLYS) CEO sell his shares on 11/14/2025?

On 11/14/2025, the reported weighted average sale prices for the Qualys CEO’s trades were approximately $141.2415, $142.1459, $143.1849, and $143.7967 per share, across several transactions.

How many Qualys (QLYS) shares does the CEO own after the reported Form 4 trades?

Following the reported transactions, CEO Sumedh S. Thakar directly owned 254,800 shares of Qualys common stock, as disclosed in the Form 4.

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

Yes. The filing states that the sale transaction was effected under a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2025.

What stock option position related to Qualys (QLYS) is mentioned in the filing?

The filing describes a stock option (right to buy) for 6,500 shares of Qualys common stock at an exercise price of $25.56 per share, noted as fully vested and immediately exercisable, with an expiration date of 04/28/2026.

What is the role of the reporting person in Qualys (QLYS)?

The reporting person, Sumedh S. Thakar, is identified as both a Director and an Officer of Qualys, serving as CEO & President.