QUALYS (QLYS) director Berquist sells 939 shares under Rule 10b5-1 plan

Rhea-AI Filing Summary

QUALYS, INC. director Thomas Berquist reported an open-market sale of 939 shares of common stock at $110.75 per share. The transaction was made under a pre-arranged Rule 10b5-1 trading plan adopted on February 27, 2026. After the sale, he directly holds 6,781 shares.

Insider Trade Summary 10b5-1

Net Seller: 939 shares ($103,994)

Net Sell 1 txn

Insider Berquist Thomas

Role null

Sold 939 shs ($104K)

Type	Security	Shares	Price	Value
Sale	Common Stock	939	$110.75	$104K

Holdings After Transaction: Common Stock — 6,781 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 939 shares Sale price per share: $110.75 per share Shares held after transaction: 6,781 shares +1 more

4 metrics

Shares sold 939 shares Open-market sale on June 12, 2026

Sale price per share $110.75 per share Common stock transaction

Shares held after transaction 6,781 shares Director’s direct holdings following sale

Transactions classified as sales 1 transaction Form 4 transaction summary

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, non-derivative

4 terms

Rule 10b5-1 trading plan regulatory

"The sale transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

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.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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.

non-derivative financial

"transaction_type: "non-derivative""

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Form 4 Insider Transactions: What Each Field Means →

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^*

Berquist Thomas

(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)
06/12/2026

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	06/12/2026		S(1)		939	D	$110.75	6,781	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.

	/s/ Bruce Posey, by power of attorney	06/15/2026
	** 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)

FAQ

What insider transaction did QUALYS (QLYS) director Thomas Berquist report?

Director Thomas Berquist reported selling 939 shares of QUALYS common stock in an open-market transaction at $110.75 per share. The filing also shows that he directly holds 6,781 shares after this sale was completed.

Was the QUALYS (QLYS) insider sale done under a Rule 10b5-1 plan?

Yes. The sale was executed under a Rule 10b5-1 trading plan adopted by Thomas Berquist on February 27, 2026. Such plans pre-schedule trades, which can make the timing more routine and less discretionary.

How many QUALYS (QLYS) shares did the director sell and at what price?

Thomas Berquist sold 939 shares of QUALYS common stock at a reported price of $110.75 per share. This was an open-market sale classified as a non-derivative transaction in the Form 4 filing.

How many QUALYS (QLYS) shares does Thomas Berquist hold after the reported sale?

After the reported transaction, Thomas Berquist directly holds 6,781 shares of QUALYS common stock. This post-transaction holding figure comes directly from the Form 4 and reflects his remaining direct ownership.

What does the transaction code 'S' mean in the QUALYS (QLYS) Form 4?

The transaction code “S” in the Form 4 indicates a sale of non-derivative securities in the open market or a private transaction. In this case, it applies to 939 shares of QUALYS common stock sold by director Thomas Berquist.