DU YING (Chairwoman & CEO) sold 9.4% of their position (100K shares) of ZAI LAB LTD on the open market

Open‑market sale worth $1.92M — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

DU YING

Filed: 3/6/2026ACC: 0000905148-26-001193

InsiderDU YINGCIK 1731790

→

IssuerZAI LAB LTDCIK 1704292

DirectorOfficer· Chairwoman & CEO

Since Jan 2021

-100K

Net shares

Net seller

$1.92M

Total sold

Open market trades

0B · 3S

Total transactions

100K acquired · 200K disposed

Non-Derivative Transactions5

American Depositary Shares

Direct

M · Option Exercise

+50K

Price / share

$1.74

Trade value

$87K

% of position

5.2%

3/4/2026

964.16K→1.01M

American Depositary Shares

Direct

S · Sale

−14.29K

Price / share

$18.78

Trade value

$268.32K

% of position

1.4%

3/4/2026

1.01M→999.87K

American Depositary Shares

Direct

S · Sale

−35.71K

Price / share

$19.32

Trade value

$689.83K

% of position

3.6%

3/4/2026

999.87K→964.16K

American Depositary Shares

Direct

M · Option Exercise

+50K

Price / share

$1.74

Trade value

$87K

% of position

5.2%

3/5/2026

964.16K→1.01M

American Depositary Shares

Direct

S · Sale

−50K

Price / share

$19.22

Trade value

$961.05K

% of position

4.9%

3/5/2026

1.01M→964.16K

Total

Net shares

+0.00

Net value

-$1.75M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
American Depositary Shares Direct	3/4/2026	M · Option Exercise	+50K	$1.74	$87K	5.2%	964.16K	1.01M
American Depositary Shares Direct	3/4/2026	S · Sale	−14.29K	$18.78	$268.32K	1.4%	1.01M	999.87K
American Depositary Shares Direct	3/4/2026	S · Sale	−35.71K	$19.32	$689.83K	3.6%	999.87K	964.16K
American Depositary Shares Direct	3/5/2026	M · Option Exercise	+50K	$1.74	$87K	5.2%	964.16K	1.01M
American Depositary Shares Direct	3/5/2026	S · Sale	−50K	$19.22	$961.05K	4.9%	1.01M	964.16K
Total			+0.00		-$1.75M

Derivative Transactions2

Stock Options (Right to Buy)

Direct

M · Option Exercise

Converts to

American Depositary Shares

50K shares

−50K

Strike price

1.74

Held after

872.18K

Exercisable

—

3/4/2026

Stock Options (Right to Buy)

Direct

M · Option Exercise

Converts to

American Depositary Shares

50K shares

−50K

Strike price

1.74

Held after

822.18K

Exercisable

—

3/5/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Options (Right to Buy) Direct	American Depositary Shares50K shares	3/4/2026	M · Option Exercise	−50K	1.74	—	872.18K
Stock Options (Right to Buy) Direct	American Depositary Shares50K shares	3/5/2026	M · Option Exercise	−50K	1.74	—	822.18K