Zai Lab insider Ying Du sold 234,048 ADS for $7.29M; another 50,000 ADS planned

Rhea-AI Filing Summary

Zai Lab Limited (ZLAB) filed a Rule 144 notice disclosing a proposed sale of 50,000 American Depositary Shares through Fidelity Brokerage Services with an aggregate market value of $1,731,814.58. The filing lists the securities as acquired by option granted 10/22/2015 and shows an intended sale date of 08/11/2025. The issuer's outstanding shares are listed as 421,725,450, providing context for the size of the transaction.

The filing also lists prior sales by Ying Du during May–August 2025 totaling 234,048 ADS for aggregate gross proceeds of $7,290,892.36. The filer affirms no undisclosed material adverse information and provides broker details for the planned sale.

Insights

Financial Analyst

TL;DR: Documented insider sales continue but represent a small fraction of outstanding shares.

The filing shows a proposed sale of 50,000 ADS valued at $1.73M and a series of prior sales by Ying Du totaling 234,048 ADS for $7.29M in gross proceeds over recent months. Compared with the stated 421,725,450 shares outstanding, these disposals represent a very small percentage of issued securities, suggesting limited immediate dilution or supply shock. This is factual disclosure under Rule 144 and provides clear transaction dates, broker information, and proceeds, which help investors track insider liquidity events.

Corporate Governance Expert

TL;DR: Repeated insider sales are notable for governance monitoring despite being numerically small versus outstanding shares.

The filing documents multiple sales by the same person

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
American Depositary Shares	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	50000	1731814.58	421725450	08/11/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
American Depositary Shares	08/11/2025	Option Granted - 10/22/2015	Issuer			50000	08/11/2025	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	05/12/2025	50000	1472165.00
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	05/13/2025	50000	1428650.00
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	05/14/2025	46389	1302858.26
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	06/26/2025	23669	855196.47
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	06/30/2025	6918	245723.90
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	07/02/2025	7072	249143.73
Ying Du 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	08/08/2025	50000	1737155.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)