Qualys (QLYS) CEO sells 13,200 shares under Rule 10b5-1 trading plan

Q: Were the QUALYS (QLYS) CEO’s June 1, 2026 share sales pre-planned?

Yes. A footnote explains the reported sale transaction was effected under a Rule 10b5-1 trading plan adopted on February 27, 2026. Such plans pre-schedule trades, meaning the timing of these sales was determined in advance rather than based on day-of market developments.

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

QUALYS, INC. CEO and President Sumedh S. Thakar reported open-market sales of a total of 13,200 shares of Common Stock on June 1, 2026. The transactions were executed in multiple trades at weighted average prices ranging from about $112 to $116 per share.

According to a footnote, these sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted by the reporting person on February 27, 2026, indicating the timing was set in advance as part of a systematic selling program.

Insights

Qualys CEO executes pre-planned sale of 13,200 shares under a Rule 10b5-1 plan.

Qualys CEO and President Sumedh Thakar reported open-market sales totaling 13,200 shares of Common Stock on June 1, 2026. Trade prices clustered between roughly $112 and $116 per share, with each line item reflecting a weighted average sale price.

A key detail is that the filing states these transactions were executed pursuant to a Rule 10b5-1 trading plan adopted on February 27, 2026. Such plans pre-schedule trades, so the timing carries less informational weight about management’s current view of the stock, and the filing shows no associated option exercises or derivative trades.

Insider Trade Summary 10b5-1

Net Seller: 13,200 shares ($1,514,407)

Net Sell 4 txns

Insider Thakar Sumedh S

Role CEO & PRESIDENT

Sold 13,200 shs ($1.51M)

Type	Security	Shares	Price	Value
Sale	Common Stock	600	$112.4554	$67K
Sale	Common Stock	1,700	$113.9524	$194K
Sale	Common Stock	10,861	$114.9717	$1.25M
Sale	Common Stock	39	$115.57	$5K

Holdings After Transaction: Common Stock — 262,486 shares (Direct, null)

Footnotes (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. The sale price represents the weighted average price of the shares sold ranging from $112.04 to $112.82 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. The sale price represents the weighted average price of the shares sold ranging from $113.31 to $114.30 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. The sale price represents the weighted average price of the shares sold ranging from $114.43 to $115.00 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.

Key Figures

Shares sold: 13,200 shares Sale price (trade 1): $115.5700/share Sale price (trade 2): $114.9717/share +3 more

6 metrics

Shares sold 13,200 shares Total Common Stock sold on June 1, 2026 per transactionSummary

Sale price (trade 1) $115.5700/share Weighted average price for one open-market sale line

Sale price (trade 2) $114.9717/share Weighted average price for another open-market sale line

Sale price (trade 3) $113.9524/share Weighted average price for a separate open-market sale line

Sale price (trade 4) $112.4554/share Weighted average price for one of the reported sales

Net buy/sell shares -13,200 shares NetSell shares from transactionSummary for this Form 4

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale, Common Stock

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 on February 27, 2026."

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 ranging from $112.04 to $112.82 per share."

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.

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.

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Form 4 Insider Transactions: What Each Field Means →

06/02/2026 - 04:45 PM

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).

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

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
X	Officer (give title below)	Other (specify below)
	CEO & PRESIDENT

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/01/2026		S⁽¹⁾		600	D	$112.4554⁽²⁾	262,486	D
Common Stock	06/01/2026		S⁽¹⁾		1,700	D	$113.9524⁽³⁾	260,786	D
Common Stock	06/01/2026		S⁽¹⁾		10,861	D	$114.9717⁽⁴⁾	249,925	D
Common Stock	06/01/2026		S⁽¹⁾		39	D	$115.57	249,886	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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.

2. The sale price represents the weighted average price of the shares sold ranging from $112.04 to $112.82 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 $113.31 to $114.30 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 $114.43 to $115.00 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 Posey by power of attorney for Sumedh S. Thakar	06/02/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did QUALYS (QLYS) report in this Form 4?

QUALYS reported that CEO and President Sumedh S. Thakar sold 13,200 shares of Common Stock on June 1, 2026. The filing shows four separate open-market sale entries, each with its own weighted average price in the low-to-mid $110s per share.

At what prices did the Qualys (QLYS) CEO sell his shares?

The CEO’s sales used weighted average prices around the low-to-mid $110s per share. Individual lines list average sale prices such as $112.4554, $113.9524, $114.9717 and $115.5700, reflecting multiple trades within price ranges disclosed in the footnotes.

How many QUALYS (QLYS) shares did the CEO sell according to this Form 4?

The transaction summary shows net sales of 13,200 shares of QUALYS Common Stock. This total comes from four separate open-market sale entries reported for June 1, 2026, with no offsetting purchases, gifts, tax withholdings or derivative exercises in this particular filing.

Does this QUALYS (QLYS) Form 4 include any option exercises or derivative trades?

No. The derivativeSummary section is empty and the transactionSummary lists zero derivative exercises and derivative transactions. All reported activity involves non-derivative Common Stock sales, indicating this Form 4 covers only open-market share dispositions, not option exercises or other derivative events.