Updated Jul 16, 2026 · Last SEC filing 2026-07-06
Zai Lab Ltd (ZLAB) has filed 21 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-06. 3 Form 8-K material event filings were reported by ZLAB in the last 90 days. 10 Form 144 notices of proposed sale were filed for ZLAB stock. InsiderAlpha tracks every ZLAB SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0001704292 |
| Form 4 filings (90d) | 21 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 10 |
| Latest Form 4 filing | 2026-07-06 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Du Ying | Chairperson & CEO | F — Tax withholding / forfeiture | 4.3K | $19.12 | $83K | SEC | |
| Du Ying | Chairperson & CEO | M — Option exercise | 11.0K | — | — | SEC | |
| Du Ying | Chairperson & CEO | F — Tax withholding / forfeiture | 7.1K | $19.15 | $136K | SEC | |
| GAYNOR RICHARD | Insider | P — Open-market purchase | 1.7K | $19.05 | $33K | SEC | |
| Du Ying | Chairperson & CEO | M — Option exercise | 18.0K | — | — | SEC | |
| Du Ying | Chairperson & CEO | S — Open-market sale | 7.0K | $18.53 | $130K | SEC | |
| Du Ying | Chairperson & CEO | M — Option exercise | 18.0K | — | — | SEC | |
| Edmondson Frazor Titus III | Chief Legal Officer | S — Open-market sale | 4.1K | $17.46 | $72K | SEC | |
| Chen Yajing | Chief Financial Officer | S — Open-market sale | 2.3K | $17.46 | $40K | SEC | |
| Du Ying | Chairperson & CEO | S — Open-market sale | 24.5K | $17.46 | $429K | SEC | |
| Du Ying | Chairperson & CEO | M — Option exercise | 58.8K | — | — | SEC | |
| Chen Yajing | Chief Financial Officer | M — Option exercise | 6.2K | — | — | SEC | |
| Edmondson Frazor Titus III | Chief Legal Officer | M — Option exercise | 14.6K | — | — | SEC | |
| Lis William | Insider | S — Open-market sale | 7.0K | $18.09 | $127K | SEC | |
| WIRTH PETER | Insider | A — Grant or award | 22.4K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Zai Lab Ltd (ZLAB). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Du Ying | 32 | $7.77M |
| Edmondson Frazor Titus III | 4 | $143K |
| Chen Yajing | 3 | $40K |
| GAYNOR RICHARD | 2 | $33K |
| Wang Yizhe | 2 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ZLAB insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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