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Zai Lab officer Amado Rafael, who is identified as President and Head of Global Oncology Research and Development, reported a sale of 3,000 American Depositary Shares (ADS) on 08/08/2025. The Form 4 shows the sale was effected pursuant to a Rule 10b5-1 trading plan adopted on November 22, 2024. Each ADS represents ten ordinary shares of the issuer.

After the reported transaction, the reporting person directly beneficially owned 42,178 ADS. The filing discloses the per-ADS price for the reported sale as $35.

Chen Yajing, Chief Financial Officer of Zai Lab Ltd (ZLAB), reported a sale of 4,096 American Depositary Shares (ADSs) on 08/08/2025. Each ADS represents ten ordinary shares, and the ADSs are fully fungible with ordinary shares. The reported sale price was $34.01 per ADS and the transaction was effected pursuant to a pre-existing Rule 10b5-1 trading plan adopted by the reporting person on March 3, 2025. Following this disposition the reporting person beneficially owned 16,908 ADSs. The Form 4 discloses no derivative transactions and was signed by an attorney-in-fact on behalf of the reporting person.

Zai Lab director and CEO Du Ying reported exercising and selling American Depositary Shares (ADSs) in matched transactions. On 08/08/2025 and 08/11/2025 she exercised two separate blocks of 50,000 ADS-equivalent stock options each at an exercise price of $0.60 per ADS and contemporaneously sold the same amounts under a pre-existing Rule 10b5-1 trading plan adopted on November 20, 2024. The reported weighted-average sale prices were $34.7431 and $34.6363, with disclosed price ranges for each sale. Each ADS represents 10 ordinary shares. Following the reported transactions the Form 4 shows beneficial ownership of 536,962 ADSs and remaining derivative holdings of 96,387 stock options. The Form notes the options had fully vested as of October 22, 2020 and offers to provide per-price sale details to regulators or security holders.

Zai Lab Limited (ZLAB) filed a Form 144 reporting a proposed sale of 50,000 American Depositary Shares (ADSs) through Fidelity Brokerage on 08/12/2025 for an aggregate market value of $1,712,555.53. The form shows the ADSs were acquired on 08/12/2025 from the issuer upon exercise of an option originally granted on 10/22/2015, with payment in cash. The filing lists 421,725,450 shares outstanding, so the proposed block equals about 0.0119% of outstanding ADSs.

The notice also discloses prior dispositions by the same seller (listed as Ying Du) over the past three months totaling 284,048 ADSs for gross proceeds of $9,022,707.36 (sales dated 05/12/2025鈥�08/11/2025). Sales are reported on NASDAQ and routed through Fidelity Brokerage Services LLC.

Wellington Management and affiliates reported beneficial ownership of 50,084,792 shares of Zai Lab Ltd. common stock, representing 4.51% of the class as of the report. The filing is a Schedule 13G (Amendment No. 5) disclosing that the reporting persons have 0 sole voting or dispositive power, 42,744,773 shares of shared voting power and 50,084,792 shares of shared dispositive power. The securities are owned of record by clients of the Wellington Investment Advisers and the filing states no client is known to own more than 5% of the class. The document lists the issuer's principal executive office in Shanghai and is certified and signed by a Wellington regulatory analyst on 08/12/2025.

Qiming-affiliated investors report beneficial ownership of 66,329,320 ordinary shares of Zai Lab, representing 5.97% of the outstanding class. The disclosed position is held through QM11 Limited and related Cayman entities and is composed, per the filing, of 1,268,000 ADSs and 53,649,320 ordinary shares that together total the reported 66,329,320 shares.

Breakdown in the filing shows Qiming Corporate GP IV, Ltd. and QM11 Limited with sole voting and dispositive power over the 66,329,320 shares, while related Qiming entities report shared voting/dispositive power of 64,299,112 shares (5.79%) and 2,030,208 shares (0.18%). The percentage is calculated using 1,110,783,740 ordinary shares outstanding, as disclosed by the issuer.

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鈥揂ugust 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.

Zai Lab Limited has filed a Form 144 disclosing a proposed sale of 50,000 American Depositary Shares (ADS) through Fidelity Brokerage Services LLC on 08/08/2025, with an aggregate market value reported as $1,737,156.02 and 421,725,450 ADS outstanding. The notice states these ADS were acquired under options granted on 10/22/2015 and lists the acquisition and payment date as 08/08/2025 with payment in cash.

The filing also itemizes seven prior ADS sales by Ying Du between 05/09/2025 and 07/02/2025, showing transaction sizes and gross proceeds for each. The form includes the standard Rule 144 representation that the seller is not aware of any undisclosed material adverse information about the issuer.

What: Form 144 notice related to Zai Lab Limited (ZLAB) reporting a proposed sale of American Depositary Shares (ADS).

Key facts:

• Shares to be sold: 3,000 ADS
• Aggregate market value: $105,000.00
• Approximate sale date: 08/08/2025
• Exchange: NASDAQ
• Shares outstanding (issuer): 421,725,450

Acquisition: ADS were acquired on 12/30/2023 via restricted stock vesting from the issuer; consideration/ payment listed as compensation.

Other: The filing states "Nothing to Report" for securities sold in the past three months. Some filer/contact fields in the form content are not populated.