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

Qualys (QLYS) legal chief sells 866 shares in preset plan

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

Rhea-AI Filing Summary

QUALYS, INC. (QLYS) reported that Chief Legal Officer Bruce K. Posey sold a total of 866 shares of Common Stock on August 20, 2026 in four open-market transactions under a Rule 10b5-1 trading plan adopted on August 21, 2025. Reported weighted-average sale prices ranged from about $181.99 to $185.91 per share, with each price reflecting multiple executions within specified price ranges.

Positive

  • None.

Negative

  • None.
Insider POSEY BRUCE K
Role CHIEF LEGAL OFFICER
Sold 866 shs ($160K)
Type Security Shares Price Value
Sale Common Stock F1, F2 97 $181.9875 $18K
Sale Common Stock F1, F3 393 $183.5817 $72K
Sale Common Stock F1, F4 96 $184.249 $18K
Sale Common Stock F1, F5 280 $185.9138 $52K
Holdings After Transaction: Common Stock — 59,554 shares (Direct)
Footnotes (5)
  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 August 21, 2025.
  2. F2. The sale price represents the weighted average price of the shares sold ranging from $181.85 to $182.06 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 $183.06 to $184.04 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 $184.06 to $184.91 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 $185.39 to $186.38 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.
Total shares sold 866 shares Aggregate Common Stock sales by Bruce K. Posey on August 20, 2026
First transaction 97 shares at $181.9875 per share Common Stock sale on August 20, 2026; price is a weighted average
Second transaction 393 shares at $183.5817 per share Common Stock sale on August 20, 2026; price is a weighted average
Third transaction 96 shares at $184.2490 per share Common Stock sale on August 20, 2026; price is a weighted average
Fourth transaction 280 shares at $185.9138 per share Common Stock sale on August 20, 2026; price is a weighted average
Rule 10b5-1 plan adoption date August 21, 2025 Trading plan under which the August 20, 2026 sales were effected
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.
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.
Common Stock financial
"security_title: "Common Stock""
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

What did QLYS insider Bruce K. Posey report in this Form 4?
Bruce K. Posey, Chief Legal Officer of QUALYS, INC. (QLYS), reported selling 866 shares of Common Stock on August 20, 2026 in four open-market transactions under a Rule 10b5-1 trading plan.

How many QLYS shares were sold in each transaction?
On August 20, 2026, Bruce K. Posey reported sales of 97 shares, 393 shares, 96 shares, and 280 shares of QUALYS, INC. Common Stock, for a total of 866 shares sold.

What were the reported sale prices for the QLYS insider transactions?
The reported weighted-average per-share prices were $181.9875, $183.5817, $184.2490, and $185.9138. Footnotes state each is a weighted average price for shares sold within disclosed price ranges on August 20, 2026.

Were the QLYS insider sales made under a Rule 10b5-1 plan?
Yes. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by Bruce K. Posey on August 21, 2025, indicating the trades were pre-arranged under that plan.

Does the Form 4 state Bruce K. Posey’s remaining QLYS share holdings?
No. For each reported transaction, the field for total shares following the transaction is left blank, so this Form 4 does not state Bruce K. Posey’s remaining Common Stock holdings.

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Form 4 Insider Transactions: What Each Field Means →
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*
POSEY BRUCE K
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
CHIEF LEGAL OFFICER
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026		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 Stock08/20/2026S(1)97D$181.9875(2)60,323D
Common Stock08/20/2026S(1)393D$183.5817(3)59,930D
Common Stock08/20/2026S(1)96D$184.249(4)59,834D
Common Stock08/20/2026S(1)280D$185.9138(5)59,554D
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 August 21, 2025.
2. The sale price represents the weighted average price of the shares sold ranging from $181.85 to $182.06 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 $183.06 to $184.04 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 $184.06 to $184.91 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 $185.39 to $186.38 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 K. Posey08/21/2026
** 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