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sellWeak cluster of 210b5-1 plan

William Lis sold $213k of ZLAB

director at Zai Lab Ltd. 8,506 shares at an average of $25.00, traded Aug 12, 2026, filed Aug 13, 2026.

Warning score
20
Value
$213k
8,506 shares
Holdings after
41,931
-17% from before
From 52-week low
+56%
low $16.30, close $25.49
From 52-week high
-29%
high $35.73, as of Aug 12, 2026

Score components

  • Role
    Director
    +15
  • Trade size
    $213k at market
    +12
  • Share of holdings sold
    Sold 17% of holdings
    +5
  • Cluster
    2 insiders selling within 14 days
    +8
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ZLABOct 9, 2026 · close 24.99
Since filing Aug 13, 2026: -4.0%SPY +0.3% · excess -4.3%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0000905148-26-003620, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 12, 2026SOpen-market sale
American Depositary Shares10b5-1
-8,506$25.00$213k41,931Aug 13, 2026

Related signals

Other insiders at Zai Lab Ltd and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
10Weak
ZLABsell 210b5-1
Zai Lab Ltd
Yajing Chen
Chief Financial Officer
$7,020
260 shares
-1%
10Weak
ZLABsell 210b5-1
Zai Lab Ltd
Yajing Chen
Chief Financial Officer
$15k
619 shares
-2%
14Weak
ZLABbuy10b5-1
Zai Lab Ltd
Richard Gaynor
director
$33k
1,736 shares
+2%
36Weak
ZLABsell 4
Zai Lab Ltd
Ying Du
Chairperson & CEO
$130k
7,026 shares
-1%
28Weak
ZLABsell 4
Zai Lab Ltd
Yajing Chen
Chief Financial Officer
$40k
2,264 shares
-6%
42Moderate
ZLABsell 4
Zai Lab Ltd
Ying Du
Chairperson & CEO
$429k
24,543 shares
-2%
28Weak
ZLABsell 4
Zai Lab Ltd
Frazor Titus Edmondson III
Chief Legal Officer
$72k
4,103 shares
-12%
26Weak
ZLABsell 410b5-1
Zai Lab Ltd
William Lis
director
$127k
7,040 shares
-12%
23Weak
ZLABsell 210b5-1
Zai Lab Ltd
Ying Du
Chairperson & CEO
$2.0M
100,000 shares
-9%
23Weak
ZLABsell 210b5-1
Zai Lab Ltd
Ying Du
Chairperson & CEO
$2.0M
100,000 shares
-9%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

William Lis sold $213k of ZLAB | InsiderTell