Du Ying - 10 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
10 Mar 2026
Net transactions value
-$20,363
Form type
4
Filing time
12 Mar 2026, 16:12:08 UTC
Previous filing
10 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 12 Mar 2026 0001731790

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ZLAB American Depositary Shares Options Exercise +261,092 +27% $1.74* 1,225,253 10 Mar 2026 Direct F1, F2
transaction ZLAB American Depositary Shares Tax liability -116,936 -9.5% $19.41* 1,108,317 10 Mar 2026 Direct F1, F2
transaction ZLAB American Depositary Shares Options Exercise +2,655 +0.24% 1,110,972 10 Mar 2026 Direct F1, F3, F4
transaction ZLAB American Depositary Shares Sale $20,363 -1,067 -0.1% $19.08 1,109,905 11 Mar 2026 Direct F1, F5

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 -261,092 -36% $0.000000* 461,092 10 Mar 2026 American Depositary Shares 261,092 $1.74 Direct F1, F2, F6
transaction ZLAB Restricted Share Units Options Exercise -2,655 -25% $0.000000* 7,965 10 Mar 2026 American Depositary Shares 2,655 Direct F1, F4, F7
* 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 These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 11, 2025.
F3 ADSs acquired upon vesting of Restricted Share Units ("RSUs").
F4 Each RSU represents a contingent right to receive one ADS.
F5 These ADSs were sold automatically to cover taxes upon vesting of RSUs.
F6 The option vested in equal annual installments over five years beginning on August 25, 2017, the first anniversary of the date of grant.
F7 The RSUs vest in equal annual installments over four years beginning on 03/10/2026, 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.