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Zai Lab Ltd (ZLAB) XNAS PHARMACEUTICAL PREPARATIONS Net insider selling (90d)
Latest ZLAB Insider Trades Zai Lab Ltd is a biopharmaceutical company focusing on discovering or licensing, developing, and commercializing proprietary therapeutics that address areas of unmet medical need including in the fields of oncology, autoimmune and infectious diseases. Zai Lab has a diverse pipeline of potentially first-in-class product candidates developed through in-house R&D and global partnerships. The company has successfully commercialized several products in China, including Zejula, Optune, Qinlock, and Nuzyra, with plans for further expansion The pipeline of proprietary drug candidates of the company includes ZL-1222, ZL-1311, ZL-6201 and many others.
Headquarters SHANGHAI
Employees 1,797
Listed 2017
Exchange XNAS https://www.zailaboratory.com SEC filings for ZLAB on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market purchase 1 1,736 $33K Open-market sale 8 54,361 $1.03M Grant or award 11 455,468
ZLAB Insider Transactions (Form 4) 62 69 Form 4 filings on record, the earliest from Oct 3, 2024, newest first. Filing history page 1 of 3.
Date Insider Transaction Security Shares Price Value Aug 19, 2026 YC Yajing Chen - Officer Open-market sale American Depositary Shares 260
Recent ZLAB Form 8-K Filings 5
Recent ZLAB Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Aug 20, 2026 Smiley Joshua L Former Officer 98,653 $2.58M View on EDGAR Aug 19, 2026 Chen Yajing Officer
ZLAB Insider Trading - FAQ
What is the latest insider trade for ZLAB? Zai Lab Ltd (ZLAB) had 20 insider filings in the last 90 days, with the most recent on 2026-08-21. The full record for ZLAB runs to 69 Form 4 filings, the earliest from 2024-10-03. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying ZLAB stock? 1 insider purchase of ZLAB was filed in the last 90 days, totaling $33K.
How many insiders are selling ZLAB stock? 8 insider sales of ZLAB were filed in the last 90 days, totaling $1.03M.
Where can I see ZLAB SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks ZLAB Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow ZLAB insider buys? Create a free InsiderAlpha account and press Watch on this page to add ZLAB to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Health Care Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track ZLAB insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
Sign up free YC Yajing Chen - Officer Open-market sale $15K
Aug 11, 2026
YD Ying Du - Officer Open-market sale $130K
Jun 30, 2026
YD Ying Du - Officer Open-market sale $429K
Jun 26, 2026
YC Yajing Chen - Officer Open-market sale $40K
Jun 26, 2026
Market cap $2.93B
P/E ratio -
Dividend yield -
Average volume 1.01M
52 week high $34.72
52 week low $15.96
Today's high $26.45
Today's low $25.87
Open $26.45
Volume 650.0K
Previous close $26.82
Shares outstanding 112.27M Market cap
$2.93B
1,797 employees
ZLAB Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
3% Buying 97% Selling
1 insider purchase totaling $33K against 8 sales totaling $1.03M.
Most-Active ZLAB Insiders - Last 90 Days 10 Tax withholding / forfeiture 3 11,858
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Aug 14, 2026 YC Yajing Chen - Officer Option exercise American Depositary Shares 1,250 - -
Aug 14, 2026 YC Yajing Chen - Officer Tax withholding / forfeiture American Depositary Shares 427 $25.90 $11K
Aug 14, 2026 YC Yajing Chen - Officer Option exercise Restricted Share Units 1,250 $0.00 -
Aug 12, 2026 WL William Lis - Director Open-market sale American Depositary Shares 8,506 $25.00 $213K
Aug 11, 2026 YC Yajing Chen - Officer Open-market sale American Depositary Shares 619 $25.00 $15K
Jul 1, 2026 RG Richard Gaynor Open-market purchase American Depositary Shares 1,736 $19.05 $33K
Jul 1, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 18,000 - -
Jul 1, 2026 YD Ying Du - Officer Tax withholding / forfeiture American Depositary Shares 7,083 $19.15 $136K
Jul 2, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 11,048 - -
Jul 2, 2026 YD Ying Du - Officer Tax withholding / forfeiture American Depositary Shares 4,348 $19.12 $83K
Jul 1, 2026 YD Ying Du - Officer Option exercise Restricted Share Units 18,000 $0.00 -
Jul 2, 2026 YD Ying Du - Officer Option exercise Restricted Share Units 11,048 $0.00 -
Jul 2, 2026 YD Ying Du - Officer Grant or award Restricted Share Units 80,393 $0.00 -
Jun 29, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 17,970 - -
Jun 30, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 7,026 $18.53 $130K
Jun 29, 2026 YD Ying Du - Officer Option exercise Restricted Share Units 17,970 $0.00 -
Jun 25, 2026 YD Ying Du - Officer Option exercise Restricted Share Units 58,800 $0.00 -
Jun 25, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 58,800 - -
Jun 26, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 24,543 $17.46 $429K
Jun 25, 2026 YC Yajing Chen - Officer Option exercise Restricted Share Units 6,250 $0.00 -
Jun 25, 2026 YC Yajing Chen - Officer Option exercise American Depositary Shares 6,250 - -
Jun 26, 2026 YC Yajing Chen - Officer Open-market sale American Depositary Shares 2,264 $17.46 $40K
Jun 22, 2026 WL William Lis Open-market sale American Depositary Shares 7,040 $18.09 $127K
Jun 17, 2026 RG Richard Gaynor Grant or award American Depositary Shares 22,371 $0.00 -
Jun 17, 2026 MV Michel Vounatsos Grant or award American Depositary Shares 22,371 $0.00 -
Jun 17, 2026 WL William Lis Grant or award American Depositary Shares 22,371 $0.00 -
Jun 17, 2026 PW Peter Wirth Grant or award American Depositary Shares 22,371 $0.00 -
Jun 17, 2026 JD John D. Diekman Grant or award American Depositary Shares 22,371 $0.00 -
Jun 17, 2026 NL Nisa Leung Grant or award American Depositary Shares 22,371 $0.00 -
May 11, 2026 YW Yizhe Wang - Officer Grant or award Stock Option (Right to Buy) 136,819 $0.00 -
May 11, 2026 YW Yizhe Wang - Officer Grant or award Restricted Share Units 59,288 $0.00 -
May 26, 2026 YD Ying Du - Officer Gift American Depositary Shares 19,857 $0.00 -
May 27, 2026 YD Ying Du - Officer Gift American Depositary Shares 33,993 $0.00 -
May 27, 2026 YD Ying Du - Officer Gift American Depositary Shares 53,850 $0.00 -
May 19, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 261,092 $1.74 $454K
May 19, 2026 YD Ying Du - Officer Tax withholding / forfeiture American Depositary Shares 117,435 $18.75 $2.20M
May 19, 2026 YD Ying Du - Officer Option exercise Stock Options (Right to Buy) 261,092 $0.00 -
May 15, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 50,000 $1.74 $87K
May 15, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 50,000 $20.74 $1.04M
May 18, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 50,000 $1.74 $87K
May 18, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 50,000 $19.00 $950K
May 15, 2026 YD Ying Du - Officer Option exercise Stock Options (Right to Buy) 50,000 $0.00 -
May 18, 2026 YD Ying Du - Officer Option exercise Stock Options (Right to Buy) 50,000 $0.00 -
May 13, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 50,000 $1.74 $87K
May 13, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 16,231 $19.44 $316K
May 13, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 33,769 $20.22 $683K
May 14, 2026 YD Ying Du - Officer Option exercise American Depositary Shares 50,000 $1.74 $87K
May 14, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 50,000 $20.09 $1.00M
May 13, 2026 YD Ying Du - Officer Option exercise Stock Options (Right to Buy) 50,000 $0.00 -
May 14, 2026 YD Ying Du - Officer Option exercise Stock Options (Right to Buy) 50,000 $0.00 -
Apr 6, 2026 JS Joshua L. Smiley - Officer Open-market sale American Depositary Shares 3,017 $20.45 $62K
Apr 6, 2026 YD Ying Du - Officer Open-market sale American Depositary Shares 2,653 $20.45 $54K
Apr 6, 2026 YC Yajing Chen - Officer Open-market sale American Depositary Shares 853 $20.45 $17K
Apr 6, 2026 RA Rafael Amado - Officer Open-market sale American Depositary Shares 2,739 $20.45 $56K
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