ZLAB — Zai Lab Ltd
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2017-09-20.
Performance
Technicals
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Measured signals that fired on ZLAB
| date | signal | measured base rate |
|---|---|---|
| 2026-08-07 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-07-24 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-06-29 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-06-09 | Equal lows taken out structure | -0.64% over 21 days · t = -4.75 · n = 55,661 statistically distinguishable from its control group |
| 2026-04-23 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-04-14 | Bollinger bandwidth breaks out of its own compression structure | -0.63% over 21 days · t = -2.80 · n = 7,196 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-19 | Chen Yajing Chief Financial Officer | Open-market sale 10b5-1 plan | 260 | 27.00 | 7.0K |
| 2026-08-14 | Chen Yajing Chief Financial Officer | Shares withheld for tax | 427 | 25.90 | 11.1K |
| 2026-08-14 | Chen Yajing Chief Financial Officer | Option exercise | 1.2K | — | — |
| 2026-08-12 | Lis William Director | Open-market sale 10b5-1 plan | 8.5K | 25.00 | 212.7K |
| 2026-08-11 | Chen Yajing Chief Financial Officer | Open-market sale 10b5-1 plan | 619 | 25.00 | 15.5K |
| 2026-07-02 | Du Ying Chairperson & CEO | Shares withheld for tax | 4.3K | 19.12 | 83.1K |
| 2026-07-02 | Du Ying Chairperson & CEO | Option exercise | 11.0K | — | — |
| 2026-07-01 | Du Ying Chairperson & CEO | Shares withheld for tax | 7.1K | 19.15 | 135.6K |
| 2026-07-01 | GAYNOR RICHARD Director | Open-market purchase 10b5-1 plan | 1.7K | 19.05 | 33.1K |
| 2026-07-01 | Du Ying Chairperson & CEO | Option exercise | 18.0K | — | — |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| RTW INVESTMENTS, LP | 123.7M | 6.6M |
| RA CAPITAL MANAGEMENT, L.P. | 107.4M | 5.7M |
| Frazier Life Sciences Management, L.P. | 35.8M | 1.9M |
| CITADEL ADVISORS LLC | 31.8M | 1.7M |
| BAMCO INC /NY/ | 31.2M | 1.7M |
| ADAR1 Capital Management, LLC | 26.8M | 1.4M |
| FMR LLC | 23.7M | 1.3M |
| BlackRock, Inc. | 16.3M | 865.1K |
| Rock Springs Capital Management LP | 15.3M | 814.7K |
| UBS Group AG | 9.5M | 504.2K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 144 | 2026-08-19 | — | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-14 | on EDGAR ↗ |
| 4 | 2026-08-13 | 2026-08-12 | on EDGAR ↗ |
| 4 | 2026-08-13 | 2026-08-11 | on EDGAR ↗ |
| 144 | 2026-08-12 | — | on EDGAR ↗ |
| 144 | 2026-08-11 | — | on EDGAR ↗ |
| 10-Q | 2026-08-06 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-08-06 | 2026-08-06 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Zai Lab Ltd (ZLAB) filed form 144 · 2026-08-19 · SEC EDGAR
- Zai Lab Ltd (ZLAB) filed form 4 · 2026-08-18 · SEC EDGAR
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