Zai Lab Ltd

Other than as described below, during the period covered by this report, none of the Company’s directors or executive officers hasadopted orterminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement (each as defined in Item 408 of Regulation S-K).

On February 23, 2024, William Lis, one of the Company’sdirectors, adopted a new written Rule 10b5-1 trading arrangement for the disposition of up to 10,397 of the Company’s ADSs, each representing ten of the Company’s ordinary shares, to cover tax obligations in connection with the vesting of a previously granted restricted stock award. This Rule 10b5-1 trading arrangement is scheduled to terminate no later than July 31, 2024.

In addition, in the 2023 Annual Report, the Company inadvertently omitted disclosure regarding the adoption of a new written Rule 10b5-1 trading arrangement on December 13, 2023 by F. Ty Edmondson, the Company’s Chief Legal Officer, for the sale of up to 40,000 ADSs. This Rule 10b5-1 trading arrangement is scheduled to terminate no later than November 29, 2024. In addition, the Rule 10b5-1 trading arrangement adopted by Rafael Amado, the Company’s President, Head of Global Oncology Research and Development, on December 15, 2023 is for the sale of up to 15,750 ADSs, rather than 94,500 ADSs as previously disclosed in our 2023 Annual Report.