ZLAB (Zai Lab Limited American Depositary Shares)
Insider Trading Activity
Every open-market purchase and sale reported by ZLAB 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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-21 | Yajing Chen | Chief Financial Officer | Sell | — | — |
| 2026-08-18 | Yajing Chen | Chief Financial Officer | MIXED | — | — |
| 2026-08-13 | William Lis | Director | Sell | — | — |
| 2026-08-13 | Yajing Chen | Chief Financial Officer | Sell | — | — |
| 2026-07-06 | RICHARD GAYNOR | Director | Buy | — | — |
| 2026-07-06 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-07-01 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-06-29 | Yajing Chen | Chief Financial Officer | MIXED | — | — |
| 2026-06-29 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | — | — |
| 2026-06-29 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-06-24 | William Lis | Director | Sell | — | — |
| 2026-06-22 | PETER WIRTH | Director | A | — | — |
| 2026-06-22 | Scott W Morrison | Director | A | — | — |
| 2026-06-22 | William Lis | Director | A | — | — |
| 2026-06-22 | Nisa Leung | Director | A | — | — |
| 2026-06-22 | Michel Vounatsos | Director | A | — | — |
| 2026-06-22 | JOHN D DIEKMAN | Director | A | — | — |
| 2026-06-22 | RICHARD GAYNOR | Director | A | — | — |
| 2026-06-22 | LEON O MOULDER JR | Director | A | — | — |
| 2026-06-08 | Yizhe Wang | Operating Partner | A | — | — |
| 2026-05-28 | Ying Du | Chairperson & CEO | G | — | — |
| 2026-05-21 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-05-19 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-05-15 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-05-15 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | — | — |
| 2026-04-08 | Ying Du | Chairperson & CEO | Sell | — | — |
| 2026-04-08 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | — | — |
| 2026-04-08 | Rafael Amado | See Remarks | Sell | — | — |
| 2026-04-08 | Yajing Chen | Chief Financial Officer | Sell | — | — |
| 2026-04-08 | Joshua L Smiley | See Remarks | Sell | — | — |
| 2026-04-03 | Joshua L Smiley | See Remarks | MIXED | — | — |
| 2026-04-03 | Rafael Amado | See Remarks | MIXED | — | — |
| 2026-04-03 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-04-03 | Yajing Chen | Chief Financial Officer | MIXED | — | — |
| 2026-04-03 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | — | — |
| 2026-03-19 | RICHARD GAYNOR | Director | Buy | — | — |
| 2026-03-16 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | — | — |
| 2026-03-16 | Joshua L Smiley | See Remarks | MIXED | — | — |
| 2026-03-16 | Yajing Chen | Chief Financial Officer | MIXED | — | — |
| 2026-03-16 | Ying Du | Chairperson & CEO | A | — | — |
| 2026-03-16 | Rafael Amado | See Remarks | MIXED | — | — |
| 2026-03-12 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-03-10 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-03-06 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | — | — |
| 2026-03-06 | Ying Du | Chairperson & CEO | MIXED | — | — |
| 2026-03-05 | Rafael Amado | See Remarks | Sell | — | — |
| 2026-01-02 | Rafael Amado | See Remarks | MIXED | — | — |
| 2025-12-18 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | — | — |
| 2025-12-12 | Ying Du | Chairperson & CEO | G | — | — |
| 2025-11-25 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 8,019,229 | — |
| — | Chairperson & CEO | 1,215,176 | — |
| — | Director | 420,121 | — |
| — | President & COO | 265,168 | — |
| — | Director | 122,140 | — |
| — | See Remarks | 117,602 | — |
| — | CCO & President, Greater China | 104,847 | — |
| — | Director | 94,973 | — |
| — | Director | 80,737 | — |
| — | Director | 72,787 | — |
| — | See Remarks | 70,050 | — |
| — | See Remarks | 57,022 | — |
| — | Director | 56,904 | — |
| — | Chief Financial Officer | 51,840 | — |
| — | Director | 41,931 | — |
| — | Director | 39,525 | — |
| — | Chief Financial Officer | 35,635 | — |
| — | Chief Legal Officer | 34,449 | — |
| — | Head of Global Dev., Oncology | 28,985 | — |
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 ZLAB quote page; the site-wide leaderboard is on the insider transactions hub.