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sellWeak cluster of 210b5-1 plan

Yajing Chen sold $7,020 of ZLAB

Chief Financial Officer at Zai Lab Ltd. 260 shares at an average of $27.00, traded Aug 19, 2026, filed Aug 21, 2026.

Warning score
10
Value
$7,020
260 shares
Holdings after
35,635
-1% from before
From 52-week low
+64%
low $16.30, close $26.72
From 52-week high
-25%
high $35.44, as of Aug 19, 2026

Score components

  • Role
    CFO
    +22
  • Trade size
    $7k at market
    0
  • Share of holdings sold
    Sold 0.7% of holdings
    0
  • 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 21, 2026: -3.9%SPY +1.9% · excess -5.9%

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 0000905148-26-003867, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 19, 2026SOpen-market sale
American Depositary Shares10b5-1
-260$27.00$7,02035,635Aug 21, 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
$15k
619 shares
-2%
20Weak
ZLABsell 210b5-1
Zai Lab Ltd
William Lis
director
$213k
8,506 shares
-17%
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.

Yajing Chen sold $7,020 of ZLAB | InsiderTell