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Zai Lab Ltd (NASDAQ:ZLAB)
CN · Delayed Price · Currency is USD
Healthcare · Biotechnology
24.21+0.18 (+0.73%)
Insider Score
––Not scored
ZLAB Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
ZLAB Stock Insider Trading Activity
ZLAB stock’s insider trading shows 1 purchase for an estimated $33.07K and 8 sales on the open market for an estimated $1.03M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Chen Yajing CFO | Option exercise | 920 | — | — | 2.6% | 36,555 | Oct 1, 2026 | — | Form 4 |
| Chen Yajing CFO | Tax withheld | 315 | $25.50 | $8.03K | 0.9% | 36,240 | Oct 1, 2026 | — | Form 4 |
| Chen Yajing CFO | Sell | 260 | $27.00 | $7.02K | 0.7% | 35,635 | Aug 19, 2026 | — | Form 4 |
| Chen Yajing CFO | Tax withheld | 427 | $25.90 | $11.06K | 1.2% | 35,895 | Aug 14, 2026 | — | Form 4 |
| Chen Yajing CFO | Option exercise | 1,250 | — | — | 3.6% | 36,322 | Aug 14, 2026 | — | Form 4 |
| Lis William Director | Sell | 8,506 | $25.00 | $212.65K | 16.9% | 41,931 | Aug 12, 2026 | — | Form 4 |
| Chen Yajing CFO | Sell | 619 | $25.00 | $15.47K | 1.7% | 35,072 | Aug 11, 2026 | — | Form 4 |
| Du Ying CEO | Tax withheld | 4,348 | $19.12 | $83.13K | 0.4% | 1,221,401 | Jul 2, 2026 | — | Form 4 |
| Du Ying CEO | Option exercise | 11,048 | — | — | 0.9% | 1,225,749 | Jul 2, 2026 | — | Form 4 |
| Du Ying CEO | Tax withheld | 7,083 | $19.15 | $135.64K | 0.6% | 1,214,701 | Jul 1, 2026 | — | Form 4 |
| GAYNOR RICHARD Director | Buy | 1,736 | $19.05 | $33.07K | 2.2% | 80,737 | Jul 1, 2026 | — | Form 4 |
| Du Ying CEO | Option exercise | 18,000 | — | — | 1.5% | 1,221,784 | Jul 1, 2026 | — | Form 4 |
| Du Ying CEO | Sell | 7,026 | $18.53 | $130.22K | 0.6% | 1,203,784 | Jun 30, 2026 | — | Form 4 |
| Du Ying CEO | Option exercise | 17,970 | — | — | 1.5% | 1,210,810 | Jun 29, 2026 | — | Form 4 |
| Edmondson Frazor Titus III Other | Sell | 4,103 | $17.46 | $71.64K | 11.9% | 30,346 | Jun 26, 2026 | — | Form 4 |
| Du Ying CEO | Sell | 24,543 | $17.46 | $428.52K | 2.0% | 1,192,840 | Jun 26, 2026 | — | Form 4 |
| Chen Yajing CFO | Sell | 2,264 | $17.46 | $39.53K | 6.0% | 35,691 | Jun 26, 2026 | — | Form 4 |
| Du Ying CEO | Option exercise | 58,800 | — | — | 5.1% | 1,217,383 | Jun 25, 2026 | — | Form 4 |
| Chen Yajing CFO | Option exercise | 6,250 | — | — | 19.7% | 37,955 | Jun 25, 2026 | — | Form 4 |
| Edmondson Frazor Titus III Other | Option exercise | 14,600 | — | — | 73.6% | 34,449 | Jun 25, 2026 | — | Form 4 |
| Lis William Director | Sell | 7,040 | $18.09 | $127.35K | 12.2% | 50,437 | Jun 22, 2026 | — | Form 4 |
| Lis William Director | Award | 22,371 | — | — | 63.7% | 57,477 | Jun 17, 2026 | — | Form 4 |
| Vounatsos Michel Director | Award | 22,371 | — | — | 44.4% | 72,787 | Jun 17, 2026 | — | Form 4 |
| DIEKMAN JOHN D Director | Award | 22,371 | — | — | 22.4% | 122,140 | Jun 17, 2026 | — | Form 4 |
| MOULDER LEON O JR Director | Award | 22,371 | — | — | 30.8% | 94,973 | Jun 17, 2026 | — | Form 4 |
| Leung Nisa Director | Award | 22,371 | — | — | 30.3% | 96,297 | Jun 17, 2026 | — | Form 4 |
| Morrison Scott W Director | Award | 22,371 | — | — | 64.8% | 56,904 | Jun 17, 2026 | — | Form 4 |
| WIRTH PETER Director | Award | 22,371 | — | — | 5.7% | 416,121 | Jun 17, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Buy (P) — Open-market or private purchase
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.