LYTIR

Company · ZLAB

Zai Lab Limited

Name as listed on its exchange; filed with the SEC as Zai Lab Ltd.

Nasdaq's symbol directory lists ZLAB on Nasdaq as “Zai Lab Limited - American Depositary Shares”: an American depositary receipt, a certificate traded in the US for shares of a foreign company.

In the 12 months to Nov 8, 2026: insiders bought on 1 occasion ($33K); insiders sold on 8 occasions ($1.0M); 1 filing by holders of 5% or more; 2 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $33K in total; Insider sales: $1.0M in total.Jun: Insider sales $797KJul: Insider purchases $33KAug: Insider sales $235KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $33KInsider sales below: $1.0M
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Du Ying, Chairperson & CEO sold on 2 days latest Jun 30, 2026 sold $559K
  2. Lis William sold on 2 days all under a 10b5-1 plan latest Aug 12, 2026 sold $340K
  3. Edmondson Frazor Titus III, Chief Legal Officer sold on 1 day latest Jun 26, 2026 sold $72K
  4. Chen Yajing, Chief Financial Officer sold on 3 days 2 of them under a 10b5-1 plan latest Aug 19, 2026 sold $62K
  5. GAYNOR RICHARD bought on 1 day latest Jul 1, 2026 bought $33K
Every trade (9)
  1. SELLChen Yajing, Chief Financial Officer sold Aug 19, 2026 260 shares 10b5-1 plan (scheduled) filing $7K
  2. SELLLis William sold Aug 12, 2026 8,506 shares 10b5-1 plan (scheduled) filing $213K
  3. SELLChen Yajing, Chief Financial Officer sold Aug 11, 2026 619 shares 10b5-1 plan (scheduled) filing $15K
  4. BUYGAYNOR RICHARD bought Jul 1, 2026 1,736 shares 10b5-1 plan (scheduled) filing $33K
  5. SELLDu Ying, Chairperson & CEO sold Jun 30, 2026 7,026 shares filing $130K
  6. SELLDu Ying, Chairperson & CEO sold Jun 26, 2026 24,543 shares filing $429K
  7. SELLEdmondson Frazor Titus III, Chief Legal Officer sold Jun 26, 2026 4,103 shares filing $72K
  8. SELLChen Yajing, Chief Financial Officer sold Jun 26, 2026 2,264 shares filing $40K
  9. SELLLis William sold Jun 22, 2026 7,040 shares 10b5-1 plan (scheduled) filing $127K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. TCG Crossover GP II, LLC filed Jun 11, 2026 Schedule 13G passive filing 2.6%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Nov 5, 2026
  2. Entry into a material definitive agreement; Unregistered sales of equity securities; Regulation FD disclosure; Other events filing Oct 23, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.