# EDGAR Filing Document

**Accession Number:** 0001731790
**File Stem:** 0000950170-23-006709
**Filing Date:** 2023-3
**Character Count:** 7481
**Document Hash:** 9f015d2472e5f52b40bd2960bb1a0605
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950170-23-006709.hdr.sgml**: 20230308

**ACCESSION NUMBER**: 0000950170-23-006709

**CONFORMED SUBMISSION TYPE**: 4/A

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230303

**FILED AS OF DATE**: 20230308

**DATE AS OF CHANGE**: 20230308

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Du Ying
- **CENTRAL INDEX KEY:** 0001731790

**FILING VALUES:**
- **FORM TYPE:** 4/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38205
- **FILM NUMBER:** 23716247

**MAIL ADDRESS:**
- **STREET 1:** C/O ZAID LAB LIMITED
- **STREET 2:** 4560 JINKE ROAD, BLDG. 1, 4F, PUDONG
- **CITY:** SHANGHAI
- **STATE:** F4
- **ZIP:** 201210
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Zai Lab Ltd
- **CENTRAL INDEX KEY:** 0001704292
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 4560 JINKE ROAD
- **STREET 2:** BLDG. 1, 4F, PUDONG
- **CITY:** SHANGHAI
- **STATE:** F4
- **ZIP:** 201210
- **BUSINESS PHONE:** 862161632588

**MAIL ADDRESS:**
- **STREET 1:** 4560 JINKE ROAD
- **STREET 2:** BLDG. 1, 4F, PUDONG
- **CITY:** SHANGHAI
- **STATE:** F4
- **ZIP:** 201210

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4/A

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a 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). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Du Ying<br><sub>(Last) (First) (Middle)</sub><br>C/O ZAI LAB LIMITED<br>314 MAIN STREET, 4TH FLOOR, SUITE 100<br><sub>(Street)</sub><br>CAMBRIDGE, MA 02142<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-03-03 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chairperson & CEO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Zai Lab Ltd [ ZLAB ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| American Depositary Shares<sup>(1)</sup> | 2023-03-03<sup>(2)</sup> |  | G<sup>(3)</sup> |  | 426 | D | $0.00 | 815421 | D |  |
| American Depositary Shares<sup>(1)</sup> | 2023-03-03<sup>(4)</sup> |  | G<sup>(5)</sup> |  | 426 | D | $0.00 | 814995 | D |  |
| American Depositary Shares<sup>(1)</sup> | 2023-03-06 |  | M<sup>(6)</sup> |  | 300000 | A | 0.60<sup>(7)</sup> | 1114995 | D |  |
| American Depositary Shares<sup>(1)</sup> | 2023-03-06 |  | F<sup>(8)</sup> |  | 120906 | D | 40.55<sup>(9)</sup> | 994089 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Options (Right to Buy) | $0.60 | 2023-03-06 |  | M<sup>(6)</sup> |  |  | 300000 | <sup>(10)</sup> | 2025-10-22 | American Depositary Shares | 300000 | $0.00 | 589165 | D |  |

---

### Footnotes:

(1) 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.

(2) As a result of a typographical error, the original Form 4 reporting this transaction stated the wrong transaction date.

(3) This transaction represents a bona fide gift of securities by the reporting person to an UTMA account for the benefit of the reporting person's adult child.

(4) As a result of a typographical error, the original Form 4 reporting this transaction stated the wrong transaction date.

(5) This transaction represents a bona fide gift of securities by the reporting person to the reporting person's adult child.

(6) The reported transaction was effected pursuant to a sale plan adopted by the Reporting Person, dated 12/13/2022, that expires on 12/20/2023 and is intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1034.

(7) As a result of a typographical error, the original Form 4 reporting this transaction stated the wrong transaction price.

(8) This transaction represents the disposition of shares to cover taxes.

(9) As a result of a typographical error, the original Form 4 reporting this transaction stated the wrong transaction price.

(10) The Stock Options fully vested as of October 22, 2020.

**Signature:** /s/ Bruce Blefeld, Attorney-in-Fact  
**Date:** 2023-03-08

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**