Qualys (QLYS) director offloads 500 shares under 10b5-1 plan

Rhea-AI Filing Summary

QUALYS, INC. (QLYS) director Wendy Pfeiffer reported a sale of company stock. On August 20, 2026, she sold 500 shares of Qualys common stock at $185.00 per share in a sale described as an open market or private transaction. The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on February 20, 2026. Following this sale, she directly holds 11,710 shares of Qualys common stock.

Insider Trade Summary 10b5-1

Net Seller: 500 shares

Net Sell 1 txn

Insider Pfeiffer Wendy

Role Director

Sold 500 shs ($93K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	500	$185.00	$93K

Holdings After Transaction: Common Stock — 11,710 shares (Direct)

Footnotes (1)

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 20, 2026.

Key Figures

Shares sold: 500 shares Sale price per share: $185.00 per share Shares owned after transaction: 11,710 shares +1 more

4 metrics

Shares sold 500 shares Common Stock sale on August 20, 2026

Sale price per share $185.00 per share Common Stock transaction on August 20, 2026

Shares owned after transaction 11,710 shares Direct holdings of Qualys common stock following the sale

Rule 10b5-1 trading plan adoption date February 20, 2026 Plan under which the reported sale was effected

Key Terms

Rule 10b5-1 trading plan, sale in open market or private transaction, Reporting Person

3 terms

Rule 10b5-1 trading plan regulatory

"was effected pursuant to a Rule 10b5-1 trading plan adopted"

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.

sale in open market or private transaction financial

"transaction code description: Sale in open market or private transaction"

Reporting Person regulatory

"trading plan adopted by the Reporting Person on February 20, 2026"

FAQ

What insider transaction did Wendy Pfeiffer report for QUALYS, INC. (QLYS)?

Wendy Pfeiffer, a director of QUALYS, INC. (QLYS), reported selling 500 shares of Qualys common stock on August 20, 2026 in a transaction coded as a sale in an open market or private transaction.

At what price were the QLYS shares sold in Wendy Pfeiffer’s Form 4 filing?

The reported sale by Wendy Pfeiffer involved 500 shares of Qualys common stock at a price of $185.00 per share, characterized as a sale in an open market or private transaction.

How many QLYS shares does Wendy Pfeiffer hold after this reported sale?

After the reported transaction, Wendy Pfeiffer directly holds 11,710 shares of Qualys common stock, as disclosed in the Form 4 following the sale of 500 shares.

Was Wendy Pfeiffer’s sale of QLYS shares under a Rule 10b5-1 trading plan?

Yes. The Form 4 states that the sale transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by Wendy Pfeiffer on February 20, 2026.

What does the transaction code in Wendy Pfeiffer’s QLYS Form 4 indicate?

The transaction code is “S”, which the filing describes as a sale in open market or private transaction, confirming that the reported activity was a disposition of Qualys common stock.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/21/2026 - 04:06 PM Accepted by SEC EDGAR 08/21/2026 - 04:05 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^*

Pfeiffer Wendy

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

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	08/20/2026		S(1)		500	D	$185	11,710	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 20, 2026.

	/s/ Bruce Posey, by power of attorney	08/21/2026
	** 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)