Du Ying - 04 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
04 Mar 2026
Net transactions value
-$1,919,208
Form type
4
Filing time
06 Mar 2026, 16:25:46 UTC
Previous filing
12 Dec 2025
Next 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 06 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 +50,000 +5.2% $1.74* 1,014,161 04 Mar 2026 Direct F1
transaction ZLAB American Depositary Shares Sale $268,322 -14,290 -1.4% $18.78 999,871 04 Mar 2026 Direct F1, F2, F3
transaction ZLAB American Depositary Shares Sale $689,831 -35,710 -3.6% $19.32 964,161 04 Mar 2026 Direct F1, F2, F4
transaction ZLAB American Depositary Shares Options Exercise +50,000 +5.2% $1.74* 1,014,161 05 Mar 2026 Direct F1
transaction ZLAB American Depositary Shares Sale $961,055 -50,000 -4.9% $19.22 964,161 05 Mar 2026 Direct F1, F2, 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 -50,000 -5.4% $0.000000* 872,184 04 Mar 2026 American Depositary Shares 50,000 $1.74 Direct F1, F6
transaction ZLAB Stock Options (Right to Buy) Options Exercise -50,000 -5.7% $0.000000* 822,184 05 Mar 2026 American Depositary Shares 50,000 $1.74 Direct F1, F6
* 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 11, 2025.
F3 Reflects a weighted average sale price of $18.7769 per share, at prices ranging from $18.09 to $19.085 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 $19.3176 per share, at prices ranging from $19.09 to $19.50 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 Reflects a weighted average sale price of $19.2211 per share, at prices ranging from $18.89 to $19.395 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.
F6 The option vested in equal annual installments over five years beginning on August 25, 2017, the first anniversary of the date of grant.