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  4. [Form 4] QUALYS, INC. Insider Trading Activity

Qualys (NASDAQ: QLYS) director sells 500 shares in Rule 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Wendy Pfeiffer, a director of Qualys, Inc., reported selling 500 shares of common stock on 2026-07-20 at a price of $158.19 per share in an open market or private transaction. The sale was executed under a Rule 10b5-1 trading plan adopted on February 20, 2026, and she now directly holds 12,210 shares of Qualys common stock.

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Insider Pfeiffer Wendy
Role Director
Sold 500 shs ($79K)
Type Security Shares Price Value
Sale Common Stock F1 500 $158.19 $79K
Holdings After Transaction: Common Stock — 12,210 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.
Shares sold 500 shares Common stock sale reported by director Wendy Pfeiffer on 2026-07-20
Sale price per share $158.19 per share Price for the 500 Qualys common shares sold on 2026-07-20
Shares held after transaction 12,210 shares Direct ownership of Qualys common stock following the reported sale
Rule 10b5-1 plan adoption date February 20, 2026 Date the trading plan governing this sale was adopted
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.
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.
open market or private transaction financial
"transaction_code_description: Sale in open market or private transaction"

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FAQ

What insider transaction did Qualys (QLYS) director Wendy Pfeiffer report?
Qualys (QLYS) director Wendy Pfeiffer reported selling 500 shares of common stock. The sale occurred on 2026-07-20 at a price of $158.19 per share in an open market or private transaction under a pre-arranged Rule 10b5-1 trading plan.

At what price did Wendy Pfeiffer sell Qualys (QLYS) shares?
Wendy Pfeiffer sold her Qualys (QLYS) common shares at an average price of $158.19 per share. The transaction involved 500 shares and is classified as a sale in an open market or private transaction, as disclosed in the Form 4 filing.

How many Qualys (QLYS) shares does Wendy Pfeiffer hold after this sale?
After the reported sale, Wendy Pfeiffer directly holds 12,210 shares of Qualys (QLYS) common stock. This post-transaction ownership figure is disclosed in the Form 4 and reflects her remaining direct stake following the disposition of 500 shares.

Was the Qualys (QLYS) insider sale made under a Rule 10b5-1 plan?
Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan. The reporting person adopted this plan on February 20, 2026, indicating the transaction followed a pre-established schedule rather than being a discretionary trade.

What role does Wendy Pfeiffer hold at Qualys (QLYS) in this Form 4 filing?
In this Form 4, Wendy Pfeiffer is identified as a director of Qualys (QLYS). She is not reported as an officer or ten-percent owner in the filing, and the disclosed transaction reflects her activity as a board member holding common stock.
SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/20/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/20/2026S(1)500D$158.1912,210D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 attorney07/21/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR