QLYS (Qualys, Inc. Common Stock)

Insider Trading Activity

Every open-market purchase and sale reported by QLYS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.

Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.

Form 4 Filings
50
most recent
Open-Market Buys
0
code P
Sales
31
code S
Reporting Insiders
25
current holders
QLYS — Recent Form 4 Transactions (latest 2026-09-03)
FiledInsiderRole TypeSharesValue
2026-09-03 Thomas Berquist Director Sell
2026-09-03 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-08-21 Wendy Pfeiffer Director Sell
2026-08-21 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-08-17 Sumedh S Thakar CEO & PRESIDENT Sell
2026-08-04 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-08-03 Sumedh S Thakar CEO & PRESIDENT F
2026-08-03 Joo Mi Kim CHIEF FINANCIAL OFFICER F
2026-08-03 BRUCE K POSEY CHIEF LEGAL OFFICER F
2026-07-21 Wendy Pfeiffer Director Sell
2026-07-21 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-07-15 Sumedh S Thakar CEO & PRESIDENT Sell
2026-07-06 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-07-06 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-07-01 Sumedh S Thakar CEO & PRESIDENT Sell
2026-06-29 Sumedh S Thakar CEO & PRESIDENT Sell
2026-06-23 Wendy Pfeiffer Director Sell
2026-06-23 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-06-16 Sumedh S Thakar CEO & PRESIDENT Sell
2026-06-15 Thomas Berquist Director Sell
2026-06-15 Jeffrey P Hank Director Sell
2026-06-11 Wendy Pfeiffer Director A
2026-06-11 Jeffrey P Hank Director A
2026-06-11 Kristi Marie Rogers Director A
2026-06-11 Bradford L. Brooks Director A
2026-06-11 Thomas Berquist Director A
2026-06-11 John A. Zangardi Director A
2026-06-03 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-06-02 Sumedh S Thakar CEO & PRESIDENT Sell
2026-05-26 Wendy Pfeiffer Director Sell
2026-05-21 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-05-21 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-05-04 Sumedh S Thakar CEO & PRESIDENT F
2026-05-04 Joo Mi Kim CHIEF FINANCIAL OFFICER F
2026-05-04 BRUCE K POSEY CHIEF LEGAL OFFICER F
2026-03-16 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-03-06 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-02-24 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-02-06 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2026-02-05 Sumedh S Thakar CEO & PRESIDENT MIXED
2026-02-05 BRUCE K POSEY CHIEF LEGAL OFFICER MIXED
2026-02-05 Joo Mi Kim CHIEF FINANCIAL OFFICER MIXED
2026-02-03 Sumedh S Thakar CEO & PRESIDENT F
2026-02-03 BRUCE K POSEY CHIEF LEGAL OFFICER F
2026-02-03 Joo Mi Kim CHIEF FINANCIAL OFFICER MIXED
2026-01-22 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2026-01-16 Sumedh S Thakar CEO & PRESIDENT Sell
2026-01-05 Joo Mi Kim CHIEF FINANCIAL OFFICER Sell
2025-12-23 BRUCE K POSEY CHIEF LEGAL OFFICER Sell
2025-12-16 Sumedh S Thakar CEO & PRESIDENT MIXED
QLYS — Current Insider Holders
InsiderRole Shares HeldValue
Chairman & CEO 5,256,645
10%+ Owner 4,229,476
10%+ Owner 3,895,760
10%+ Owner 2,233,652
10%+ Owner 428,430
Chief Financial Officer 232,727
Director 200,776
CEO & PRESIDENT 183,538
Chief Financial Officer 172,633
10%+ Owner 107,106
Director 90,495
CHIEF FINANCIAL OFFICER 74,713
Director 63,861
VP Corp Dev & Strat Alliances 60,720
EVP, Worldwide Field Ops 60,500
CHIEF LEGAL OFFICER 60,323
Chief Revenue Officer 44,854
Director 27,904
Director 17,118
10%+ Owner 16,384
Director 16,046
Director 11,710
Director 11,224
Chief Accounting Officer 10,326
VP, OPERATIONS 10,000
How to read Form 4 activity

Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.

Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.

Full filing history and per-insider positions are on the QLYS quote page; the site-wide leaderboard is on the insider transactions hub.