DU YING (Chairwoman & CEO) sold 0.5% of their position (5.58K shares) of ZAI LAB LTD on the open market

Open‑market sale worth $113.7K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

DU YING

Filed: 4/3/2026ACC: 0000905148-26-001544

InsiderDU YINGCIK 1731790

→

IssuerZAI LAB LTDCIK 1704292

DirectorOfficer· Chairwoman & CEO

Since Jan 2021

+20K

Net shares

Net buyer

$113.7K

Total sold

Open market trades

0B · 1S

Total transactions

46.53K acquired · 26.53K disposed

Non-Derivative Transactions4

American Depositary Shares

Direct

M · Option Exercise

+10.80K

Price / share

—

Trade value

—

% of position

1.0%

4/1/2026

1.11M→1.12M

American Depositary Shares

Direct

M · Option Exercise

+3.40K

Price / share

—

Trade value

—

% of position

0.3%

4/1/2026

1.12M→1.12M

American Depositary Shares

Direct

M · Option Exercise

+6.75K

Price / share

—

Trade value

—

% of position

0.6%

4/2/2026

1.12M→1.13M

American Depositary Shares

Direct

S · Sale

−5.58K

Price / share

$20.39

Trade value

$113.69K

% of position

0.5%

4/2/2026

1.13M→1.13M

Total

Net shares

+15.37K

Net value

-$113.69K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
American Depositary Shares Direct	4/1/2026	M · Option Exercise	+10.80K	—	—	1.0%	1.11M	1.12M
American Depositary Shares Direct	4/1/2026	M · Option Exercise	+3.40K	—	—	0.3%	1.12M	1.12M
American Depositary Shares Direct	4/2/2026	M · Option Exercise	+6.75K	—	—	0.6%	1.12M	1.13M
American Depositary Shares Direct	4/2/2026	S · Sale	−5.58K	$20.39	$113.69K	0.5%	1.13M	1.13M
Total			+15.37K		-$113.69K

Derivative Transactions4

Performance-Based Share Units

Direct

A · Award

Converts to

American Depositary Shares

25.58K shares

+25.58K

Strike price

Held after

25.58K

Exercisable

—

3/4/2026

Restricted Share Units

Direct

M · Option Exercise

Converts to

American Depositary Shares

10.80K shares

−10.80K

Strike price

Held after

10.80K

Exercisable

—

4/1/2026

Restricted Share Units

Direct

M · Option Exercise

Converts to

American Depositary Shares

3.40K shares

−3.40K

Strike price

Held after

0.00

Exercisable

—

4/1/2026

Restricted Share Units

Direct

M · Option Exercise

Converts to

American Depositary Shares

6.75K shares

−6.75K

Strike price

Held after

13.50K

Exercisable

—

4/2/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Performance-Based Share Units Direct	American Depositary Shares25.58K shares	3/4/2026	A · Award	+25.58K	—	25.58K
Restricted Share Units Direct	American Depositary Shares10.80K shares	4/1/2026	M · Option Exercise	−10.80K	—	10.80K
Restricted Share Units Direct	American Depositary Shares3.40K shares	4/1/2026	M · Option Exercise	−3.40K	—	0.00
Restricted Share Units Direct	American Depositary Shares6.75K shares	4/2/2026	M · Option Exercise	−6.75K	—	13.50K