ZLAB · Insider Trading
Zai Lab Limited American Depositary Shares
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-05 | Yajing Chen | Chief Financial Officer | MIXED | +605 | −$8.03K |
| 2026-08-21 | Yajing Chen | Chief Financial Officer | Sell | −260 | −$7.02K |
| 2026-08-18 | Yajing Chen | Chief Financial Officer | MIXED | +823 | −$11.06K |
| 2026-08-13 | William Lis | Director | Sell | −8,506 | −$212.65K |
| 2026-08-13 | Yajing Chen | Chief Financial Officer | Sell | −619 | −$15.47K |
| 2026-07-06 | Richard Gaynor | Director | Buy | +1,736 | +$33.07K |
| 2026-07-06 | Ying Du | Chairperson & CEO | MIXED | +17,617 | −$218.77K |
| 2026-07-01 | Ying Du | Chairperson & CEO | MIXED | +10,944 | −$130.22K |
| 2026-06-29 | Yajing Chen | Chief Financial Officer | MIXED | +3,986 | −$39.53K |
| 2026-06-29 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | +10,497 | −$71.64K |
| 2026-06-29 | Ying Du | Chairperson & CEO | MIXED | +34,257 | −$428.55K |
| 2026-06-24 | William Lis | Director | Sell | −7,040 | −$127.35K |
| 2026-06-22 | Peter Wirth | Director | A | +22,371 | — |
| 2026-06-22 | Scott W Morrison | Director | A | +22,371 | — |
| 2026-06-22 | William Lis | Director | A | +22,371 | — |
| 2026-06-22 | Nisa Leung | Director | A | +22,371 | — |
| 2026-06-22 | Michel Vounatsos | Director | A | +22,371 | — |
| 2026-06-22 | John D Diekman | Director | A | +22,371 | — |
| 2026-06-22 | Richard Gaynor | Director | A | +22,371 | — |
| 2026-06-22 | Leon O Moulder Jr | Director | A | +22,371 | — |
| 2026-06-08 | Yizhe Wang | Operating Partner | A | +196,107 deriv. | — |
| 2026-05-28 | Ying Du | Chairperson & CEO | G | −107,700 | — |
| 2026-05-21 | Ying Du | Chairperson & CEO | MIXED | +143,657 | −$1.75M |
| 2026-05-19 | Ying Du | Chairperson & CEO | MIXED | — | −$1.81M |
| 2026-05-15 | Ying Du | Chairperson & CEO | MIXED | — | −$1.83M |
| 2026-05-15 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | −3,517 | −$71.01K |
| 2026-04-08 | Ying Du | Chairperson & CEO | Sell | −2,653 | −$54.25K |
| 2026-04-08 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | −1,224 | −$25.03K |
| 2026-04-08 | Rafael Amado | See Remarks | Sell | −2,739 | −$56.01K |
| 2026-04-08 | Yajing Chen | Chief Financial Officer | Sell | −853 | −$17.44K |
| 2026-04-08 | Joshua L Smiley | See Remarks | Sell | −3,017 | −$61.69K |
| 2026-04-03 | Joshua L Smiley | See Remarks | MIXED | +29,593 | −$196.03K |
| 2026-04-03 | Rafael Amado | See Remarks | MIXED | +15,004 | −$202.06K |
| 2026-04-03 | Ying Du | Chairperson & CEO | MIXED | +15,374 | −$113.69K |
| 2026-04-03 | Yajing Chen | Chief Financial Officer | MIXED | +12,559 | −$106.01K |
| 2026-04-03 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | +18,096 | −$85.52K |
| 2026-03-19 | Richard Gaynor | Director | Buy | +1,731 | +$32.73K |
| 2026-03-16 | Frazor Titus Edmondson III | Chief Legal Officer | MIXED | +2,977 | −$23.86K |
| 2026-03-16 | Joshua L Smiley | See Remarks | MIXED | +4,422 | −$36.62K |
| 2026-03-16 | Yajing Chen | Chief Financial Officer | MIXED | +2,555 | −$31.72K |
| 2026-03-16 | Ying Du | Chairperson & CEO | A | +385,849 deriv. | — |
| 2026-03-16 | Rafael Amado | See Remarks | MIXED | +2,366 | −$55.08K |
| 2026-03-12 | Ying Du | Chairperson & CEO | MIXED | +145,744 | −$1.84M |
| 2026-03-10 | Ying Du | Chairperson & CEO | MIXED | — | −$1.75M |
| 2026-03-06 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | −15,569 | −$296.75K |
| 2026-03-06 | Ying Du | Chairperson & CEO | MIXED | — | −$1.75M |
| 2026-03-05 | Rafael Amado | See Remarks | Sell | −10,000 | −$173.80K |
| 2026-01-02 | Rafael Amado | See Remarks | MIXED | +10,213 | −$188.04K |
| 2025-12-18 | Frazor Titus Edmondson III | Chief Legal Officer | Sell | −8,651 | −$148.28K |
| 2025-12-12 | Ying Du | Chairperson & CEO | G | +74,142 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Nisa Leung | Director | 8,019,229 | $195.19M |
| Ying Du | Chairperson & CEO | 1,215,176 | $29.58M |
| Peter Wirth | Director | 420,121 | $10.23M |
| John D Diekman | Director | 122,140 | $2.97M |
| Joshua L Smiley | See Remarks | 117,602 | $2.86M |
| Leon O Moulder Jr | Director | 94,973 | $2.31M |
| Richard Gaynor | Director | 80,737 | $1.97M |
| Michel Vounatsos | Director | 72,787 | $1.77M |
| Rafael Amado | See Remarks | 57,022 | $1.39M |
| Scott W Morrison | Director | 56,904 | $1.39M |
| William Lis | Director | 41,931 | $1.02M |
| Kai-Xian Chen | Director | 39,525 | $962.04K |
| Yajing Chen | Chief Financial Officer | 36,240 | $882.08K |
| Frazor Titus Edmondson III | Chief Legal Officer | 34,449 | $838.49K |
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.
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.