Ying Du - 29 Aug 2025 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
29 Aug 2025
Net transactions value
-$7,465,235
Form type
4
Filing time
03 Sep 2025, 16:42:23 UTC
Previous filing
14 Aug 2025
Next filing
12 Dec 2025
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 03 Sep 2025 0001731790

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ZLAB American Depositary Shares Options Exercise $725,251 +604,376 +113% $1.20 1,141,338 29 Aug 2025 Direct F1
transaction ZLAB American Depositary Shares Tax liability $8,190,486 -251,319 -22% $32.59 890,019 29 Aug 2025 Direct F1

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) Options Exercise $0 -604,376 -100% $0.000000 0 29 Aug 2025 American Depositary Shares 604,376 $1.20 Direct F1, F2
* 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 Stock Options fully vested as of March 9, 2021.