Zai Lab holder may sell 260 ADS on Aug. 19

Zai Lab Ltd (ZLAB) has a shareholder, Chen Yajing, filing a notice of proposed sale of American Depositary Shares under Rule 144.

Rhea-AI Filing Summary

Zai Lab Ltd (ZLAB) has a shareholder, Chen Yajing, filing a notice of proposed sale of American Depositary Shares under Rule 144. The filing states that 260 ADS may be sold through Fidelity Brokerage Services LLC on or about 08/19/2026 on NASDAQ.

The 260 ADS were acquired from the issuer on 11/01/2025 through restricted stock vesting as compensation. The filing also lists prior sales by the same holder during the past three months, including 2,264 ADS on 06/26/2026 and 619 ADS on 08/11/2026, with corresponding aggregate sale values.

Key Figures

ADS to be sold: 260 American Depositary Shares Proposed sale aggregate value: 7020.00 Proposed sale date: 08/19/2026 +5 more

8 metrics

ADS to be sold 260 American Depositary Shares Number of Zai Lab Ltd ADS proposed for sale under Rule 144

Proposed sale aggregate value 7020.00 Aggregate market value for the 260 ADS in the proposed sale

Proposed sale date 08/19/2026 Intended date for the Rule 144 ADS sale on NASDAQ

Acquisition date of ADS 11/01/2025 Date the 260 ADS were acquired via restricted stock vesting

Prior sale 1 shares 2264 American Depositary Shares ADS sold on 06/26/2026 by the same holder

Prior sale 1 value 39532.38 Aggregate value of ADS sold on 06/26/2026

Prior sale 2 shares 619 American Depositary Shares ADS sold on 08/11/2026 by the same holder

Prior sale 2 value 15475.00 Aggregate value of ADS sold on 08/11/2026

Key Terms

Rule 144, American Depositary Shares, restricted stock vesting, compensation

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

American Depositary Shares financial

"American Depositary Shares | Fidelity Brokerage Services LLC"

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

restricted stock vesting financial

"11/01/2025 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

compensation financial

"260 | 11/01/2025 | Compensation"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing for ZLAB disclose about upcoming share sales?

The filing reports that 260 American Depositary Shares of Zai Lab Ltd may be sold under Rule 144. The proposed sales will be executed through Fidelity Brokerage Services LLC, with an intended sale date of 08/19/2026 on NASDAQ.

Who is selling Zai Lab Ltd (ZLAB) shares in this Form 144 notice?

The notice identifies Chen Yajing as the person for whose account the Zai Lab Ltd ADS will be sold. Fidelity Brokerage Services LLC is listed as the broker handling the proposed 260 ADS sale under Rule 144.

How many ZLAB American Depositary Shares have been sold recently by this holder?

The holder previously sold 2,264 ADS on 06/26/2026 for aggregate proceeds of 39,532.38, and 619 ADS on 08/11/2026 for 15,475.00, as disclosed in the three-month sales history section.

What is the value of the ZLAB shares proposed to be sold under this Form 144?

The filing lists an aggregate market value of 7,020.00 for the 260 ADS proposed for sale. This figure reflects the market value used for the Rule 144 notice, not necessarily the final execution price.

How and when were the ZLAB shares in this Form 144 acquired?

The 260 Zai Lab Ltd ADS were acquired on 11/01/2025 through restricted stock vesting from the issuer as compensation. This acquisition method and date are specified in the securities-to-be-sold disclosure.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/19/2026 - 01:51 PM Accepted by SEC EDGAR 08/19/2026 - 01:51 PM Learn about SEC filing dates

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	0001985694
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Zai Lab Ltd
SEC File Number	001-38205
Address of Issuer	899 HALEI ROAD BUILDING B, PUDONG SHANGHAI CHINA 201203
Phone	862161632588
Name of Person for Whose Account the Securities are To Be Sold	Chen Yajing
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	Officer

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	260	7020.00	430452680	08/19/2026	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	11/01/2025	Restricted Stock Vesting	Issuer			260	11/01/2025	Compensation

* 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
Yajing Chen 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	06/26/2026	2264	39532.38
Yajing Chen 899 Halei Road Building B, Pudong Shanghai F4 201203	American Depositary Shares	08/11/2026	619	15475.00

144: Remarks and Signature

Remarks
Date of Notice	08/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/09/2025
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	/s/ Jessica Spraker, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Yajing Chen.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)