Du Ying - 11 Mar 2026 Form 4 Insider Report for Zai Lab Ltd (ZLAB)

Role: Chairperson & CEO, Director
Signature: /s/ Bruce Blefeld, Attorney-in-Fact
Issuer symbol: ZLAB
Transactions as of: 11 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 16 Mar 2026, 16:06:23 UTC
Previous filing: 12 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Du Ying	Chairperson & CEO, Director	C/O ZAI LAB LIMITED, 314 MAIN STREET, 4TH FLOOR, SUITE 100, CAMBRIDGE	/s/ Bruce Blefeld, Attorney-in-Fact	16 Mar 2026	0001731790

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ZLAB	Stock Options (Right to Buy)	Award		+353,430		$0.000000^*	353,430	11 Mar 2026	American Depositary Shares	353,430	$19.34	Direct	F1, F2
transaction	ZLAB	Restricted Share Units	Award		+32,419		$0.000000^*	32,419	11 Mar 2026	American Depositary Shares	32,419		Direct	F1, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each American Depositary Share ("ADS") represents ten Ordinary Shares of the issuer. Our ADSs and Ordinary Shares are fully fungible. For purposes of this Form 4, we are reporting this in terms of ADSs.
F2	The option vests in equal annual installments over four years beginning on 03/11/2027, the first anniversary of the date of grant, subject to continuous service.
F3	Each Restricted Share Unit ("RSU") represents a contingent right to receive one ADS.
F4	The RSUs vest in equal annual installments over four years beginning on 03/11/2027, the first anniversary of the date of grant, subject to continuous service. Vested shares will be delivered in the form of ADSs to the reporting person following vesting.