Yajing Chen is CFO at Zai Lab Ltd (ZLAB). They have made 16 open-market trades across 1 company since 2023, most recently 2026-10-01.
CIK 0001985694
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 16 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ZLAB | 36,240 | $840K |
Shares reported on the most recent Form 4, priced at the 2026-10-05 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ZLAB | SELL · 10b5-1 | 2026-08-19 | 2026-08-21 | $27.00 | $7K | +3.7% | +3.4% | — |
| ZLAB | SELL · 10b5-1 | 2026-08-11 | 2026-08-13 | $25.00 | $15K | +3.0% | -3.3% | — |
| ZLAB | SELL | 2026-06-26 | 2026-06-29 | $17.46 | $40K | +10.9% | -0.9% | +38.8% |
| ZLAB | SELL | 2026-04-06 | 2026-04-08 | $20.45 | $17K | +19.3% | -12.2% | -8.6% |
| ZLAB | SELL | 2026-04-02 | 2026-04-03 | $20.39 | $106K | +13.9% | +4.0% | -6.3% |
| ZLAB | SELL | 2026-03-13 | 2026-03-16 | $18.63 | $32K | -7.4% | +23.0% | -6.2% |
| ZLAB | SELL | 2025-11-03 | 2025-11-04 | $26.83 | $6K | -15.1% | -22.2% | -36.4% |
| ZLAB | SELL | 2025-10-02 | 2025-10-03 | $34.25 | $16K | -12.8% | -20.7% | -48.6% |
| ZLAB | SELL · 10b5-1 | 2025-08-15 | 2025-08-18 | $35.42 | $51K | -9.2% | -8.2% | -41.0% |
| ZLAB | SELL · 10b5-1 | 2025-08-08 | 2025-08-12 | $34.01 | $279K | -0.3% | -7.5% | -37.7% |
| ZLAB | SELL | 2025-06-26 | 2025-06-27 | $36.13 | $193K | -6.0% | +6.7% | -12.8% |
| ZLAB | SELL · 10b5-1 | 2025-06-02 | 2025-06-04 | $30.00 | $289K | +10.9% | -3.1% | -9.0% |
| ZLAB | SELL | 2025-04-04 | 2025-04-07 | $33.11 | $31K | -3.1% | -4.7% | +19.2% |
| ZLAB | SELL | 2025-04-02 | 2025-04-03 | $35.89 | $379K | -11.5% | -9.8% | +3.4% |
| ZLAB | SELL | 2024-11-04 | 2024-11-05 | $30.66 | $5K | -11.3% | -8.2% | -10.2% |
| ZLAB | SELL | 2024-10-02 | 2024-10-03 | $25.40 | $8K | -0.9% | +23.5% | -0.8% |
| ZLAB | SELL | 2024-08-15 | 2024-08-16 | $16.06 | $7K | +11.1% | +22.5% | +58.0% |
| ZLAB | SELL | 2024-06-26 | 2024-06-27 | $17.90 | $39K | -0.5% | +9.7% | +18.7% |
| ZLAB | SELL | 2024-04-04 | 2024-04-05 | $15.67 | $13K | -12.6% | +7.7% | +10.3% |
| ZLAB | SELL | 2024-04-02 | 2024-04-03 | $16.15 | $8K | -9.7% | +3.3% | +10.4% |
| ZLAB | SELL | 2023-11-02 | 2023-11-03 | $25.23 | $4K | -1.1% | -3.6% | -19.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.