As of August 29, 2026, Zai Lab's top three insider holders are Ying Du (Chairperson Ceo, 1.22Mn shares), Peter Wirth (Director, 416.12K shares), Peter Wirth (Director, 350.62K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Ying Du | Chairperson Ceo | 1,221,401 | 0 | 1,221,401 | 36.1% | 06 Jul, 2026 |
| 2 | Peter Wirth | Director | 766,736 | 0 | 766,736 | 22.7% | 22 Jun, 2026 |
| 3 | John D Diekman | Director | 189,755 | 0 | 189,755 | 5.6% | 22 Jun, 2026 |
| 4 | Joshua L Smiley | Officer | 117,602 | 0 | 117,602 | 3.5% | 08 Apr, 2026 |
| 5 | Leon O Jr Moulder | Director | 116,588 | 0 | 116,588 | 3.4% | 22 Jun, 2026 |
| 6 | Yi Liang | Cco President, Greater China | 104,847 | 0 | 104,847 | 3.1% | 05 Apr, 2022 |
| 7 | Nisa Leung | Director | 96,297 | 0 | 96,297 | 2.8% | 22 Jun, 2026 |
| 8 | Richard Gaynor | Director | 89,649 | 0 | 89,649 | 2.6% | 06 Jul, 2026 |
| 9 | Harald Reinhart | Officer | 86,716 | 0 | 86,716 | 2.6% | 27 Jun, 2024 |
| 10 | Tao Fu | President Coo | 0 | 77,500 | 77,500 | 2.3% | 29 Oct, 2021 |
| 11 | William Lis | Director | 76,045 | 0 | 76,045 | 2.2% | 13 Aug, 2026 |
| 12 | Michel Vounatsos | Director | 72,787 | 0 | 72,787 | 2.2% | 22 Jun, 2026 |
| 13 | Kai-Xian Chen | Director | 70,541 | 0 | 70,541 | 2.1% | 03 Jan, 2025 |
| 14 | Scott W Morrison | Director | 64,249 | 0 | 64,249 | 1.9% | 22 Jun, 2026 |
| 15 | Rafael Amado | Officer | 57,022 | 0 | 57,022 | 1.7% | 08 Apr, 2026 |
| 16 | Alan B. Sandler | Head Of Global Dev., Oncology | 56,910 | 0 | 56,910 | 1.7% | 05 Apr, 2022 |
| 17 | William Ki Chul Cho | Chief Financial Officer | 53,747 | 0 | 53,747 | 1.6% | 05 Apr, 2023 |
| 18 | Yajing Chen | Chief Financial Officer | 35,635 | 0 | 35,635 | 1.1% | 21 Aug, 2026 |
| 19 | Frazor Titus Iii Edmondson | Chief Legal Officer | 30,346 | 0 | 30,346 | 0.9% | 29 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 19 Aug, 2026 | Yajing Chen | Chief Financial Officer | Disposed S | 260 | $27.00 | $7.02K | 35,635 | Direct |
| 14 Aug, 2026 | Yajing Chen | Chief Financial Officer | Acquired M | 1,250 | — | — | 36,322 | Direct |
| 14 Aug, 2026 | Yajing Chen | Chief Financial Officer | Disposed F | 427 | $25.90 | $11.06K | 35,895 | Direct |
| 14 Aug, 2026 | Yajing Chen | Chief Financial Officer | Disposed M | 1,250 | $0.00 | $0 | 1,250 | Direct |
| 11 Aug, 2026 | Yajing Chen | Chief Financial Officer | Disposed S | 619 | $25.00 | $15.48K | 35,072 | Direct |
| 12 Aug, 2026 | William Lis | Director | Disposed S | 8,506 | $25.00 | $212.65K | 41,931 | Direct |
| 01 Jul, 2026 | Richard Gaynor | Director | Acquired P | 1,736 | $19.05 | $33.07K | 80,737 | Direct |
| 01 Jul, 2026 | Ying Du | Chairperson Ceo | Acquired M | 18,000 | — | — | 1,221,784 | Direct |
| 01 Jul, 2026 | Ying Du | Chairperson Ceo | Disposed F | 7,083 | $19.15 | $135.64K | 1,214,701 | Direct |
| 02 Jul, 2026 | Ying Du | Chairperson Ceo | Acquired M | 11,048 | — | — | 1,225,749 | Direct |
| 02 Jul, 2026 | Ying Du | Chairperson Ceo | Disposed F | 4,348 | $19.12 | $83.13K | 1,221,401 | Direct |
| 01 Jul, 2026 | Ying Du | Chairperson Ceo | Disposed M | 18,000 | $0.00 | $0 | 36,000 | Direct |
| 02 Jul, 2026 | Ying Du | Chairperson Ceo | Disposed M | 11,048 | $0.00 | $0 | 33,146 | Direct |
| 02 Jul, 2026 | Ying Du | Chairperson Ceo | Acquired A | 80,393 | $0.00 | $0 | 80,393 | Direct |
| 29 Jun, 2026 | Ying Du | Chairperson Ceo | Acquired M | 17,970 | — | — | 1,210,810 | Direct |
| 30 Jun, 2026 | Ying Du | Chairperson Ceo | Disposed S | 7,026 | $18.53 | $130.22K | 1,203,784 | Direct |
| 29 Jun, 2026 | Ying Du | Chairperson Ceo | Disposed M | 17,970 | $0.00 | $0 | 17,970 | Direct |
| 25 Jun, 2026 | Ying Du | Chairperson Ceo | Acquired M | 58,800 | — | — | 1,217,383 | Direct |
| 25 Jun, 2026 | Yajing Chen | Chief Financial Officer | Acquired M | 6,250 | — | — | 37,955 | Direct |
| 25 Jun, 2026 | Frazor Titus Iii Edmondson | Chief Legal Officer | Acquired M | 14,600 | — | — | 34,449 | Direct |