Zai Lab Limited Chief Financial Officer Chen Yajing filed a Form 4 on August 13, 2026, disclosing the sale of 619 American Depositary Shares on August 11, 2026, pursuant to a pre-established Rule 10b5-1 trading plan.

Key Highlights

  • Security sold: 619 American Depositary Shares (ADS) of Zai Lab Limited, disposed of on August 11, 2026
  • Sale price: $25 per ADS, as reported in the filing
  • Post-transaction ownership: Chen Yajing directly beneficially owns 35,072 ADS following the reported transaction
  • Trading plan: The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 9, 2025
  • ADS structure: Each ADS represents ten Ordinary Shares of the issuer, and ADSs and Ordinary Shares are described in the filing as "fully fungible"
  • Reporting person role: Chen Yajing is identified as Chief Financial Officer of Zai Lab Limited (NASDAQ:ZLAB)

Zai Lab CFO Reports ADS Disposition Under Pre-Planned Trading Program

According to the Form 4 filing, Chen Yajing, Chief Financial Officer of Zai Lab Limited (NASDAQ:ZLAB), disposed of 619 American Depositary Shares on August 11, 2026, at a price of $25 per ADS. The transaction is coded as a sale (Code S) in Table I of the filing, covering non-derivative securities.

The filing discloses that the sale was carried out under a Rule 10b5-1 trading plan that Chen Yajing adopted on December 9, 2025. The filing's cover indicates the box for Rule 10b5-1(c) compliance is checked, signifying the transaction was made pursuant to a contract, instruction, or written plan intended to satisfy the affirmative defense conditions of that rule.

Following the reported transaction, the filing states that Chen Yajing directly and beneficially owns 35,072 ADS. No derivative securities transactions were reported in Table II of this filing. The filing also notes that each ADS represents ten Ordinary Shares of the issuer, and that the company's ADSs and Ordinary Shares are "fully fungible," with the filing reporting holdings in ADS terms. The Form 4 was signed by Bruce Blefeld as Attorney-in-Fact and dated August 13, 2026.

What Was Disclosed

Zai Lab's CFO, Chen Yajing, reported the sale of 619 ADS at $25 each on August 11, 2026, under a Rule 10b5-1 plan adopted December 9, 2025, leaving a directly held beneficial ownership of 35,072 ADS.