This cluster is too small in both absolute and relative dollar terms to warrant a trade. Monitor for a larger sale or a pattern of multiple C-suite sales at higher volumes before drawing a bearish conclusion. ZLAB's strong analyst consensus (79% bullish) and institutional accumulation (4 funds doubled stakes) overshadow this routine insider activity.
Price Chart
Executive Summary
A small insider selling cluster at Zai Lab involved a director selling $213K in open-market shares and the CFO surrendering 427 shares for tax withholding. Total proceeds of ~$228K represent less than 0.01% of ZLAB's $2.9B market cap, making this economically trivial. The CFO's derivative exercises and tax-withholding sale are routine non-cash events, and the director's sale is too small to indicate material negative sentiment.
Key Financial Metrics
Key Facts
- Director Lis William sold 8,500 shares at $25.00, totaling ~$213K.
- CFO Chen Yajing exercised 2,500 derivative shares at $0 (non-cash) and surrendered 427 shares for tax withholding at ~$25.90.
- Total cluster value ($228K) is ~0.008% of ZLAB's $2.9B market cap.
- No open-market purchases were made by any insider during the cluster window.
- The filing is not accompanied by any concurrent earnings, guidance, or material event filings.
Financial Impact
Total insider sales of ~$228K, or 0.008% of market cap — economically negligible.
Risk Factors
- Director sale could precede a broader sell-off, though dollar amount is minimal.
- Historical calibration shows a 22% win rate on prior ZLAB reports with avg T+20 alpha of -4.50%, but this filing is low-impact and unlikely to drive significant movement.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ZLAB-1787121073897 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 21, 2026 6w ago | Insider Cluster | $26.01 $26.08 | ▲ +0.27% | ▼ −0.20% | $24.33 (−6.46%) |
Aug 13, 2026 7w ago | Insider Cluster | $26.03 $26.02 | ▼ −0.04% | ▲ +1.93% | $24.33 (−6.53%) |
Aug 13, 2026 7w ago | Insider Cluster | $26.03 $26.02 | ▼ −0.04% | ▲ +1.93% | $24.33 (−6.53%) |
Aug 12, 2026 7w ago | 144 | $25.49 $26.72 | ▲ +4.83% | ▲ +5.27% | $24.33 (−4.55%) |
Jul 1, 2026 13w ago | Insider Cluster | $19.15 $19.35 | ▲ +1.04% | ▲ +0.78% | $24.33 (+27.05%) |
Jun 29, 2026 13w ago | Insider Cluster | $19.00 $19.08 | ▲ +0.42% | ▼ −0.18% | $24.33 (+28.05%) |
Jun 11, 2026 16w ago | Institutional Cluster | $17.64 $17.88 | ▼ −1.36% | ▼ −0.93% | $24.33 (−37.93%) |
May 21, 2026 19w ago | 8-K | $18.61 $17.09 | ▼ −8.17% | ▼ −9.83% | $24.33 (+30.74%) |
May 19, 2026 19w ago | Insider Cluster | $18.81 $18.69 | ▼ −0.64% | ▼ −1.88% | $24.33 (+29.35%) |
May 19, 2026 19w ago | Insider Cluster | $18.81 $18.69 | ▲ +0.64% | ▲ +1.88% | $24.33 (−29.35%) |
US Market Status
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