Ying Du

Chairperson & CEO

Ying Du (Chairperson & CEO) filed 7 Form 4 reports in the trailing twelve months (0 purchases, 7 sales), most often in Zai Lab Limited (ZLAB). The largest single filing was $2.0M of ZLAB (100,000 sh across 3 lots, as filed), executed May 13.

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Return, ttmiAverage return per filing, trailing twelve months

–

no purchases on file

Delay-adjustediThe same average, entered at disclosure dates

–

returns measure stock purchases only

Filings, ttm

0 buys · 7 sells

Median delay

–

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$8.5M

shares × price, as filed

Last traded

Jun 30

Filed Jul 1

Median ADV $26.3M across their filed names

Open performance→

Volume by month

Buys $0 Sells $29.0M

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Healthcare 7 filings

Sector per market data · by filing · past 12 months

Most traded names

ZLAB

Zai Lab Limited ZLAB · 0 buys · 17 sells 17 filings

Recent filings

ZLABSALE Zai Lab Limited View filing → $130K
7,026 sh × $18.53
Exec Jun 30
Filed Jul 1 · 4:24 PM ET ZLABSALE Zai Lab Limited View filing → $429K
24,543 sh × $17.46
Exec Jun 26
Filed Jun 29 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $2.0M
100,000 sh across 2 lots
Exec May 15
Filed May 19 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $2.0M
100,000 sh across 3 lots
Exec May 13
Filed May 15 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $114K
5,576 sh × $20.39
Exec Apr 2
Filed Apr 3 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $1.9M
100,000 sh across 2 lots
Exec Mar 6
Filed Mar 10 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $1.9M
100,000 sh across 3 lots
Exec Mar 4
Filed Mar 6 · 5:30 PM ET ZLABSALE Zai Lab Limited View filing → $3.4M
96,387 sh across 2 lots
Exec Aug 12 2025
Filed Aug 14 2025 · 5:30 PM ET More filings →