Zai Lab Ltd Insider Trading

ZLAB

Last 12 months

Insiders bought 66K and sold $11.1M on the open market.

83% of the selling was scheduled in advance under 10b5-1 plans. See Remarks Rafael Amado sold 202K on Apr 2, 14% of their stake, outside a plan.

Net open-market

−$11M

2 buys · 33 sales

Under a 10b5-1 plan

83%

of the value sold

Insiders who bought / sold

1 / 6

executives and directors

Last open-market buy

Jul 2026

Jul 1, 2026

Get an email when ZLAB's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 19	Yajing Chen Chief Financial Officer	Sold10b5-1 plan	260	$27.00	7K	0.7%	Form 4
Aug 12	William Lis Director	Sold10b5-1 plan	8,506	$25.00	213K	17%	Form 4
Aug 11	Yajing Chen Chief Financial Officer	Sold10b5-1 plan	619	$25.00	15K	1.7%	Form 4
Jul 1	Richard Gaynor Director	Bought	1,736	$19.05	33K	2.2%	Form 4
Jun 30	Ying Du Chairperson & CEO	SoldNo plan	7,026	$18.53	130K	0.6%	Form 4
Jun 26	Frazor Titus Edmondson III Chief Legal Officer	SoldNo plan	4,103	$17.46	72K	12%	Form 4
Jun 26	Ying Du Chairperson & CEO	SoldNo plan	24,543	$17.46	429K	2.0%	Form 4
Jun 26	Yajing Chen Chief Financial Officer	SoldNo plan	2,264	$17.46	40K	6.0%	Form 4
Jun 22	William Lis Director	Sold10b5-1 plan	7,040	$18.09	127K	12%	Form 4
May 15 – 18	Ying Du Chairperson & CEO	Sold10b5-1 plan 2 parts	100,000	$19.87 average	$1.99M	8.2%	Form 4
May 14	Frazor Titus Edmondson III Chief Legal Officer	Sold10b5-1 plan	3,517	$20.19	71K	15%	Form 4
May 13 – 14	Ying Du Chairperson & CEO	Sold10b5-1 plan 3 parts	100,000	$20.03 average	$2M	8.2%	Form 4
Apr 6	Joshua L Smiley See Remarks	SoldNo plan	3,017	$20.45	62K	2.5%	Form 4
Apr 6	Frazor Titus Edmondson III Chief Legal Officer	SoldNo plan	1,224	$20.45	25K	5.0%	Form 4
Apr 6	Ying Du Chairperson & CEO	SoldNo plan	2,653	$20.45	54K	0.2%	Form 4
Apr 6	Yajing Chen Chief Financial Officer	SoldNo plan	853	$20.45	17K	2.6%	Form 4
Apr 6	Rafael Amado See Remarks	SoldNo plan	2,739	$20.45	56K	4.6%	Form 4
Apr 2	Joshua L Smiley See Remarks	SoldNo plan	9,614	$20.39	196K	7.4%	Form 4
Apr 2	Frazor Titus Edmondson III Chief Legal Officer	SoldNo plan	4,194	$20.39	86K	15%	Form 4
Apr 2	Ying Du Chairperson & CEO	SoldNo plan	5,576	$20.39	114K	0.5%	Form 4
Apr 2	Yajing Chen Chief Financial Officer	SoldNo plan	5,199	$20.39	106K	14%	Form 4
Apr 2	Rafael Amado See Remarks	SoldNo plan	9,910	$20.39	202K	14%	Form 4
Mar 17	Richard Gaynor Director	Bought	1,731	$18.91	33K	3.2%	Form 4
Mar 13	Joshua L Smiley See Remarks	SoldNo plan	1,966	$18.63	37K	2.1%	Form 4
Mar 13	Frazor Titus Edmondson III Chief Legal Officer	SoldNo plan	1,281	$18.63	24K	16%	Form 4
Mar 13	Yajing Chen Chief Financial Officer	SoldNo plan	1,703	$18.63	32K	7.8%	Form 4
Mar 13	Rafael Amado See Remarks	SoldNo plan	2,957	$18.63	55K	6.2%	Form 4
Mar 11	Ying Du Chairperson & CEO	Sold10b5-1 plan	1,067	$19.08	20K	<0.1%	Form 4
Mar 6 – 9	Ying Du Chairperson & CEO	Sold10b5-1 plan 2 parts	100,000	$19.23 average	$1.92M	9.4%	Form 4
Mar 5	Frazor Titus Edmondson III Chief Legal Officer	Sold10b5-1 plan	15,569	$19.06	297K	82%	Form 4
Mar 4 – 5	Ying Du Chairperson & CEO	Sold10b5-1 plan 3 parts	100,000	$19.19 average	$1.92M	9.4%	Form 4
Mar 3	Rafael Amado See Remarks	Sold10b5-1 plan	10,000	$17.38	174K	19%	Form 4
Dec 31, 2025	Rafael Amado See Remarks	SoldNo plan	10,787	$17.43	188K	17%	Form 4
Dec 16, 2025	Frazor Titus Edmondson III Chief Legal Officer	Sold10b5-1 plan	8,651	$17.14	148K	31%	Form 4
Nov 21, 2025	Frazor Titus Edmondson III Chief Legal Officer	Sold10b5-1 plan	14,328	$19.78	283K	34%	Form 4
Nov 3, 2025	Yajing Chen Chief Financial Officer	SoldNo plan	240	$26.83	6K	1.4%	Form 4
Oct 2, 2025	Yajing Chen Chief Financial Officer	SoldNo plan	456	$34.25	16K	2.6%	Form 4
Sep 10, 2025	Joshua L Smiley See Remarks	Bought	10,000	$28.91	289K	13%	Form 4
Aug 18, 2025	Joshua L Smiley See Remarks	SoldNo plan	6,641	$36.24	241K	8.0%	Form 4
Aug 18, 2025	Frazor Titus Edmondson III Chief Legal Officer	SoldNo plan	1,883	$36.24	68K	4.3%	Form 4

Aug 1910b5-1 plan
Yajing Chen
Chief Financial Officer · sold 260 at $27.00
7K
0.7% of stake
Aug 1210b5-1 plan
William Lis
Director · sold 8,506 at $25.00
213K
17% of stake
Aug 1110b5-1 plan
Yajing Chen
Chief Financial Officer · sold 619 at $25.00
15K
1.7% of stake
Jul 1
Richard Gaynor
Director · bought 1,736 at $19.05
33K
2.2% of stake
Jun 30No plan
Ying Du
Chairperson & CEO · sold 7,026 at $18.53
130K
0.6% of stake
Jun 26No plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 4,103 at $17.46
72K
12% of stake
Jun 26No plan
Ying Du
Chairperson & CEO · sold 24,543 at $17.46
429K
2.0% of stake
Jun 26No plan
Yajing Chen
Chief Financial Officer · sold 2,264 at $17.46
40K
6.0% of stake
Jun 2210b5-1 plan
William Lis
Director · sold 7,040 at $18.09
127K
12% of stake
May 15 – 1810b5-1 plan
Ying Du
Chairperson & CEO · sold 100,000 at avg $19.87
$1.99M
8.2% of stake
May 1410b5-1 plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 3,517 at $20.19
71K
15% of stake
May 13 – 1410b5-1 plan
Ying Du
Chairperson & CEO · sold 100,000 at avg $20.03
$2M
8.2% of stake
Apr 6No plan
Joshua L Smiley
See Remarks · sold 3,017 at $20.45
62K
2.5% of stake
Apr 6No plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 1,224 at $20.45
25K
5.0% of stake
Apr 6No plan
Ying Du
Chairperson & CEO · sold 2,653 at $20.45
54K
0.2% of stake
Apr 6No plan
Yajing Chen
Chief Financial Officer · sold 853 at $20.45
17K
2.6% of stake
Apr 6No plan
Rafael Amado
See Remarks · sold 2,739 at $20.45
56K
4.6% of stake
Apr 2No plan
Joshua L Smiley
See Remarks · sold 9,614 at $20.39
196K
7.4% of stake
Apr 2No plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 4,194 at $20.39
86K
15% of stake
Apr 2No plan
Ying Du
Chairperson & CEO · sold 5,576 at $20.39
114K
0.5% of stake
Apr 2No plan
Yajing Chen
Chief Financial Officer · sold 5,199 at $20.39
106K
14% of stake
Apr 2No plan
Rafael Amado
See Remarks · sold 9,910 at $20.39
202K
14% of stake
Mar 17
Richard Gaynor
Director · bought 1,731 at $18.91
33K
3.2% of stake
Mar 13No plan
Joshua L Smiley
See Remarks · sold 1,966 at $18.63
37K
2.1% of stake
Mar 13No plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 1,281 at $18.63
24K
16% of stake
Mar 13No plan
Yajing Chen
Chief Financial Officer · sold 1,703 at $18.63
32K
7.8% of stake
Mar 13No plan
Rafael Amado
See Remarks · sold 2,957 at $18.63
55K
6.2% of stake
Mar 1110b5-1 plan
Ying Du
Chairperson & CEO · sold 1,067 at $19.08
20K
<0.1% of stake
Mar 6 – 910b5-1 plan
Ying Du
Chairperson & CEO · sold 100,000 at avg $19.23
$1.92M
9.4% of stake
Mar 510b5-1 plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 15,569 at $19.06
297K
82% of stake
Mar 4 – 510b5-1 plan
Ying Du
Chairperson & CEO · sold 100,000 at avg $19.19
$1.92M
9.4% of stake
Mar 310b5-1 plan
Rafael Amado
See Remarks · sold 10,000 at $17.38
174K
19% of stake
Dec 31, 2025No plan
Rafael Amado
See Remarks · sold 10,787 at $17.43
188K
17% of stake
Dec 16, 202510b5-1 plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 8,651 at $17.14
148K
31% of stake
Nov 21, 202510b5-1 plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 14,328 at $19.78
283K
34% of stake
Nov 3, 2025No plan
Yajing Chen
Chief Financial Officer · sold 240 at $26.83
6K
1.4% of stake
Oct 2, 2025No plan
Yajing Chen
Chief Financial Officer · sold 456 at $34.25
16K
2.6% of stake
Sep 10, 2025
Joshua L Smiley
See Remarks · bought 10,000 at $28.91
289K
13% of stake
Aug 18, 2025No plan
Joshua L Smiley
See Remarks · sold 6,641 at $36.24
241K
8.0% of stake
Aug 18, 2025No plan
Frazor Titus Edmondson III
Chief Legal Officer · sold 1,883 at $36.24
68K
4.3% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch ZLAB, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Peers

Pharmaceutical Preparations · Pick stocks to compare with ZLAB

CompareIntrinsic value

ARDXArdelyx Inc.

$3.27+7.92%40

SVASernova Biotherapeutics Inc

No recent price0

ORGOOrganogenesis Holdings Inc.

$0.87+4.19%50

INVAInnoviva Inc.

$21.26+1.58%56

ARQTArcutis Biotherapeutics Inc.

$34.05+6.41%65

ESPREsperion Therapeutics Inc.

No recent price50

NATRNature's Sunshine Products Inc.

$12.84+6.38%70

CRMDCorMedix Inc.

$5.66+1.80%84

Held by ETFs

ZLAB is in 11 US ETFs. The largest of them, with ZLAB's weight in each:

Spot a number that looks wrong? Check it in ZLAB's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

2 of 2 free stocks used today

Keep analysing ZLAB

Create a free account and get 14 days of Premium: every stock and every tool.

Unlimited stocksQuality, fair value and dividends for 10,000+ stocks
Stock screenerFilter on quality, valuation and dividend safety
Portfolio trackerReal return, dividend calendar and portfolio quality
Editable DCFChange the assumptions and watch fair value move
Compare side by sideUp to 10 stocks in one table
Unlimited alertsPrice, P/E, Quality Score and yield

No card. Moves to Free after, unless you upgrade.

Already have an account?

Or come back tomorrow. Stocks on your watchlist are always free to view.