As of the latest Form 4 filed Jul 1, 2026.
What Zai Lab Ltd insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 23 most recent filings for ZLAB.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-01 | 2026-06-30 | Du Ying Chairperson & CEO | SSale | −7.03K | $18.53 | $130K | No | Form 4 ↗ |
| 2026-07-01 | 2026-06-29 | Du Ying, Chairperson & CEO | MExercise | +18.0K | — | — | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-26 | Edmondson Frazor Titus III Chief Legal Officer | SSale | −4.10K | $17.46 | $71.6K | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-26 | Du Ying Chairperson & CEO | SSale | −24.5K | $17.46 | $429K | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-26 | Chen Yajing Chief Financial Officer | SSale | −2.26K | $17.46 | $39.5K | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-25 | Edmondson Frazor Titus III Chief Legal Officer | MExercise | +14.6K | — | — | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-25 | Du Ying Chairperson & CEO | MExercise | +58.8K | — | — | No | Form 4 ↗ |
| 2026-06-29 | 2026-06-25 | Chen Yajing Chief Financial Officer | MExercise | +6.25K | — | — | No | Form 4 ↗ |
| 2026-06-24 | 2026-06-22 | Lis William Director | SSale | −7.04K | $18.09 | $127K | Yes (planned) | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | GAYNOR RICHARD Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | Lis William Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | Morrison Scott W Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | WIRTH PETER Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | DIEKMAN JOHN D Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | Vounatsos Michel Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | Leung Nisa Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-17 | MOULDER LEON O JR Director | AAward | +22.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Smiley Joshua L See Remarks | SSale | −3.02K | $20.45 | $61.7K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Edmondson Frazor Titus III Chief Legal Officer | SSale | −1.22K | $20.45 | $25.0K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Du Ying Chairperson & CEO | SSale | −2.65K | $20.45 | $54.2K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Chen Yajing Chief Financial Officer | SSale | −853.00 | $20.45 | $17.4K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Amado Rafael See Remarks | SSale | −2.74K | $20.45 | $56.0K | No | Form 4 ↗ |
| 2026-03-19 | 2026-03-17 | GAYNOR RICHARD Director | PPurchase | +1.73K | $18.91 | $32.7K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also ZLAB’s full analysis or the market-wide insider trading feed. The tabs above jump to ZLAB’s other SEC data.
Source: SEC Form 4 filings for ZLAB, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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