Du Ying - 12 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
12 Aug 2025
Net transactions value
-$3,300,009
Form type
4
Filing time
14 Aug 2025, 17:22:43 UTC
Previous filing
12 Aug 2025
Next filing
03 Sep 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 14 Aug 2025 0001731790

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ZLAB American Depositary Shares Options Exercise $30,000 +50,000 +9.3% $0.6000 586,962 12 Aug 2025 Direct F1
transaction ZLAB American Depositary Shares Sale $1,712,555 -50,000 -8.5% $34.25 536,962 12 Aug 2025 Direct F1, F2, F3
transaction ZLAB American Depositary Shares Options Exercise $27,832 +46,387 +8.6% $0.6000 583,349 13 Aug 2025 Direct F1
transaction ZLAB American Depositary Shares Sale $1,645,287 -46,387 -8% $35.47 536,962 13 Aug 2025 Direct F1, F2, F4

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 -50,000 -52% $0.000000 46,387 12 Aug 2025 American Depositary Shares 50,000 $0.6000 Direct F1, F5
transaction ZLAB Stock Options (Right to Buy) Options Exercise $0 -46,387 -100% $0.000000 0 13 Aug 2025 American Depositary Shares 46,387 $0.6000 Direct F1, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

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 transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 20, 2024.
F3 Reflects a weighted average sale price of $34.2511 per share, at prices ranging from $33.70 to $34.60 per share. The Reporting Person will provide, upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F4 Reflects a weighted average sale price of $35.4687 per share, at prices ranging from $34.845 to $35.80 per share. The Reporting Person will provide, upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.
F5 The Stock Options fully vested as of October 22, 2020.