Wendy Pfeiffer - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Wendy Pfeiffer has filed 4 SEC Form 4 filings across 1 company in the last 90 days - selling. Lifetime open-market sales: $267K.
Profile
Wendy Pfeiffer is a corporate insider at QUALYS, INC. (QLYS). Pfeiffer has reported 8 insider filings with the SEC since 2025. The most recent filing was in July 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- QUALYS, INC.
Awards & honors
- CIO of Qualys, Inc.
- Leadership in cloud security solutions
- Extensive experience in IT management
Trading Pattern
InsiderAlpha's records for Wendy Pfeiffer go back to 2025: 8 primary Form 4 filings, an average of 4.0 per year. 3 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Career & Filing History
Every role Wendy Pfeiffer has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at QUALYS, INC. (QLYS) - 8 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-21 | QLYS | QUALYS, INC. | S - Open-market sale [10b5-1] | 500 | $158.19 | $79K |
| 2026-06-23 | QLYS | QUALYS, INC. | S - Open-market sale [10b5-1] | 500 | $110.55 | $55K |
| 2026-06-11 | QLYS | QUALYS, INC. | A - Grant or award | 2.6K | $0.00 | |
| 2026-05-26 | QLYS | QUALYS, INC. | S - Open-market sale [10b5-1] | 500 | $101.21 | $51K |
| 2025-08-15 | QLYS | QUALYS, INC. | S - Open-market sale | 200 | $129.72 | $26K |
| 2025-07-15 | QLYS | QUALYS, INC. | S - Open-market sale | 200 | $139.45 | $28K |
| 2025-06-13 | QLYS | QUALYS, INC. | S - Open-market sale | 200 | $138.78 | $28K |
| 2025-06-11 | QLYS | QUALYS, INC. | A - Grant or award | 1.9K | $0.00 |
Companies - Last 90 Days
- QUALYS, INC. (QLYS) - 4 filings, last 2026-07-21
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Wendy Pfeiffer has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Sumedh S. Thakar - $15.70M of QLYS open-market activity in the last 12 months
- Joo Mi Kim - $4.30M of QLYS open-market activity in the last 12 months
- Bruce K. Posey - $1.74M of QLYS open-market activity in the last 12 months
- John A. Zangardi - $1.11M of QLYS open-market activity in the last 12 months
- Kristi Marie Rogers - $229K of QLYS open-market activity in the last 12 months
- Thomas Berquist - $172K of QLYS open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Patrick Whitesell
- Gregg Williams
- Stephen T. Wills
- WINMILL CO. INC
- Caroline Young
- Jeffrey Yu
- George Raymond Zage III
- Payam Zamani
Frequently Asked Questions
Who is Wendy Pfeiffer?
Wendy Pfeiffer is a corporate insider at QUALYS, INC. (QLYS). Pfeiffer has reported 8 insider filings with the SEC since 2025. The most recent filing was in July 2026.…
How many SEC Form 4 filings has Wendy Pfeiffer submitted recently?
4 primary Form 4 filings in the last 90 days, covering 1 company.
Has Wendy Pfeiffer been buying or selling stock?
Recorded transactions: 0 open-market purchases and 6 open-market sales ($267K) across all tracked filings.
Where can I see all of Wendy Pfeiffer's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Wendy Pfeiffer profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.