Key facts
- This page summarizes Du Ying's Form 4 filing for Zai Lab Ltd (ZLAB).
- 8 reported transactions and 4 derivative rows are listed below.
- Accepted by SEC: 03 Apr 2026, 17:58.
Du Ying - 04 Mar 2026 Form 4 Insider Report for Zai Lab Ltd (ZLAB)
- Reporting relationship
- Chairperson & CEO, Director
- Issuer ticker
- ZLAB
- Reported as of
- 04 Mar 2026
- Net transaction value
- -$113,695
- SEC form
- 4
- Accepted by SEC
- 03 Apr 2026, 17:58:28 UTC
- Prior SEC filing
- 12 Dec 2025
- Next SEC filing
- 10 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Bruce Blefeld, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Du Ying filed Form 4 for Zai Lab Ltd (ZLAB) on 03 Apr 2026.
Change
- Previous filing in this sequence was filed on 12 Dec 2025.
- Current net transaction value: -$113,695.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001731790
Primary reporting owner
Du Ying
- Relationship
- Chairperson & CEO, Director
- Address
- C/O ZAI LAB LIMITED, 314 MAIN STREET, 4TH FLOOR, SUITE 100, CAMBRIDGE
- Signature
- /s/ Bruce Blefeld, Attorney-in-Fact
- Signature date
- 03 Apr 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ZLAB
transaction
American Depositary Shares
Options Exercise
- Transaction value
- Shares
- +10,800
- Change %
- +0.97%
- Price
- Shares after
- 1,120,705
- Date
- 01 Apr 2026
- Ownership
- Direct
- Footnotes
- F1, F2, F3
ZLAB
transaction
American Depositary Shares
Options Exercise
- Transaction value
- Shares
- +3,400
- Change %
- +0.3%
- Price
- Shares after
- 1,124,105
- Date
- 01 Apr 2026
- Ownership
- Direct
- Footnotes
- F1, F2, F3
ZLAB
transaction
American Depositary Shares
Options Exercise
- Transaction value
- Shares
- +6,750
- Change %
- +0.6%
- Price
- Shares after
- 1,130,855
- Date
- 02 Apr 2026
- Ownership
- Direct
- Footnotes
- F1, F2, F3
ZLAB
transaction
American Depositary Shares
Sale
- Transaction value
- $113,695
- Shares
- -5,576
- Change %
- -0.49%
- Price
- $20.39
- Shares after
- 1,125,279
- Date
- 02 Apr 2026
- Ownership
- Direct
- Footnotes
- F1, F4
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
ZLAB
transaction
Derivative
Performance-Based Share Units
Award
- Transaction value
- Shares
- +25,579
- Change %
- Price
- $0.000000*
- Shares after
- 25,579
- Date
- 04 Mar 2026
- Ownership
- Direct
- Underlying class
- American Depositary Shares
- Underlying amount
- 25,579
- Exercise price
- Footnotes
- F1, F5, F6
ZLAB
transaction
Derivative
Restricted Share Units
Options Exercise
- Transaction value
- Shares
- -10,800
- Change %
- -50%
- Price
- $0.000000*
- Shares after
- 10,800
- Date
- 01 Apr 2026
- Ownership
- Direct
- Underlying class
- American Depositary Shares
- Underlying amount
- 10,800
- Exercise price
- Footnotes
- F1, F3, F7
ZLAB
transaction
Derivative
Restricted Share Units
Options Exercise
- Transaction value
- Shares
- -3,400
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 01 Apr 2026
- Ownership
- Direct
- Underlying class
- American Depositary Shares
- Underlying amount
- 3,400
- Exercise price
- Footnotes
- F1, F3, F8
ZLAB
transaction
Derivative
Restricted Share Units
Options Exercise
- Transaction value
- Shares
- -6,750
- Change %
- -33%
- Price
- $0.000000*
- Shares after
- 13,500
- Date
- 02 Apr 2026
- Ownership
- Direct
- Underlying class
- American Depositary Shares
- Underlying amount
- 6,750
- Exercise price
- Footnotes
- F1, F3, F9
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 9 footnotes
Footnote 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.
Footnote F2
ADSs acquired upon vesting of Restricted Share Units ("RSUs").
Footnote F3
Each RSU represents a contingent right to receive one ADS.
Footnote F4
These ADSs were sold automatically to cover taxes upon vesting of RSUs.
Footnote F5
Each performance-based share unit ("PSU") represents a contingent right to receive one ADS.
Footnote F6
The reporting person was granted PSUs on July 2, 2025 based on the satisfaction of specified performance criteria between January 1, 2025 through December 31, 2025. On March 4, 2026, the performance-based vesting conditions were confirmed for PSUs representing 25,579 ADSs. The PSUs vest in full on July 2, 2028, the third anniversary of the date of grant, subject to continuous service.
Footnote F7
The RSUs vest in equal annual installments over five years beginning on 04/01/2023, 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.
Footnote F8
The RSUs vested in equal annual installments over five years beginning on 04/01/2022, 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.
Footnote F9
The RSUs vest in equal annual installments over four years beginning on 04/03/2025, 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.