ZLAB
Zai Lab Ltd · Healthcare · Market cap $27.2B
Insiders sold $235K net in the last 90 days ·2 sellers, 0 buyers· 3 of 3 sales under Rule 10b5-1 plans· latest Form 4 filed Aug 21, 2026
Insider Buying
$66K
reported purchases (SEC code P)
Insider Selling
$11.1M
reported sales (SEC code S)
Unique Insiders
7
in the rolling window
Latest filing
Oct 5, 2026
Chen Yajing
Zai Lab Ltd (ZLAB) has 50 SEC Form 4 filings (100 transaction rows) in the rolling window, disclosed by 7 distinct insiders. Most recent filing: Oct 5, 2026.
Inside the rolling window, 7 insiders at Zai Lab Ltd reported 2 open-market purchases totaling $66K and 38 open-market sales totaling $11.1M. The most active filer is Chairperson & CEO Du Ying with 13 filings. Insiders have net sold $5.3M over the trailing 6 months. The most recent open-market filing is a sale of 260 shares by Chief Financial Officer Chen Yajing, dated Aug 19, 2026, worth $7K.
- Industry:Biotechnology
- CEO:Ying Du
- Employees:1,784
- HQ:Shanghai, SH, CN
- IPO:2017-09-20
| Source | |||||||
|---|---|---|---|---|---|---|---|
| Chief Financial Officer | Sale | 260 | $7K | Aug 21 | -7.0% | SEC ↗ | |
| Director | Sale | 8,506 | $213K | Aug 13 | -7.0% | SEC ↗ | |
| Chief Financial Officer | Sale | 619 | $15K | Aug 13 | -7.0% | SEC ↗ | |
GAYNOR RICHARDFirst in 4 months | Director | Purchase | 1,736 | $33K | Jul 6 | +26.8% | SEC ↗ |
| Chairperson & CEO | Sale | 7,026 | $130K | Jul 1 | +26.4% | SEC ↗ | |
| Chairperson & CEO | Sale | 24,543 | $429K | Jun 29 | +31.5% | SEC ↗ | |
| Chief Legal Officer | Sale | 4,103 | $72K | Jun 29 | +31.5% | SEC ↗ | |
| Chief Financial Officer | Sale | 2,264 | $40K | Jun 29 | +31.5% | SEC ↗ | |
Lis WilliamFirst filing | Director | Sale | 7,040 | $127K | Jun 24 | +31.7% | SEC ↗ |
| Chairperson & CEO | Sale | 50,000 | $1.0M | May 19 | +31.7% | SEC ↗ | |
| Chairperson & CEO | Sale | 50,000 | $950K | May 19 | — | SEC ↗ | |
| Chairperson & CEO | Sale | 50,000 | $998K | May 15 | — | SEC ↗ | |
| Chairperson & CEO | Sale | 50,000 | $1.0M | May 15 | — | SEC ↗ | |
| Chief Legal Officer | Sale | 3,517 | $71K | May 15 | — | SEC ↗ | |
| See Remarks | Sale | 3,017 | $62K | Apr 8 | — | SEC ↗ | |
| Chief Financial Officer | Sale | 853 | $17K | Apr 8 | — | SEC ↗ | |
| Chief Legal Officer | Sale | 1,224 | $25K | Apr 8 | — | SEC ↗ | |
| Chairperson & CEO | Sale | 2,653 | $54K | Apr 8 | — | SEC ↗ | |
| See Remarks | Sale | 2,739 | $56K | Apr 8 | — | SEC ↗ | |
| Chief Legal Officer | Sale | 4,194 | $86K | Apr 3 | — | SEC ↗ | |
| Chief Financial Officer | Sale | 5,199 | $106K | Apr 3 | — | SEC ↗ | |
| See Remarks | Sale | 9,614 | $196K | Apr 3 | — | SEC ↗ | |
| Chairperson & CEO | Sale | 5,576 | $114K | Apr 3 | — | SEC ↗ | |
| See Remarks | Sale | 9,910 | $202K | Apr 3 | — | SEC ↗ | |
GAYNOR RICHARDFirst filing | Director | Purchase | 1,731 | $33K | Mar 19 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does ZLAB have?
Zai Lab Ltd (ZLAB) has 50 SEC Form 4 filings (100 transaction rows) in the rolling 365-day window, disclosed by 7 distinct insiders. Most recent filing: Oct 5, 2026.
When was the most recent SEC Form 4 filing for ZLAB?
The most recent Form 4 filing for ZLAB on Tracefour is dated Oct 5, 2026.
Who is the most active insider at ZLAB?
The most active SEC Form 4 filer at ZLAB in the rolling window is Chairperson & CEO Du Ying, with 13 filings.
What is the net insider flow at ZLAB over the last 6 months?
Over the trailing 180 days, insiders at ZLAB have net sold $5.3M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at ZLAB in the current window?
Inside the rolling window, insiders at ZLAB bought $66K and sold $11.1M based on SEC Form 4 filings.
Can I get alerts for ZLAB insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Zai Lab Ltd (ZLAB). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Zai Lab Ltd is in the Healthcare sector.