Zai Lab Limited has scheduled its 2026 annual general meeting of shareholders for 8:00 a.m. U.S. Eastern Time / 8:00 p.m. Shanghai and Hong Kong Time on 17 June 2026. Shareholders may participate in person at 899 Halei Road, Building B, Pudong, Shanghai or virtually via www.virtualshareholdermeeting.com/ZLAB2026. The record date is 16 April 2026, with share transfer documents due by 4:30 p.m. Shanghai and Hong Kong Time on the same day.

Key resolutions to be put to vote include:

1. Re-election of nine directors—Samantha (Ying) Du, John D. Diekman, Richard Gaynor, Nisa Leung, William Lis, Scott Morrison, Leon O. Moulder Jr., Michel Vounatsos and Peter Wirth—to serve until the 2027 AGM or earlier resignation or removal.

2. Appointment of KPMG LLP and KPMG as independent registered public accounting firms and auditors for the fiscal year ending 31 December 2026, with authority for the board to fix their compensation.

3. Advisory approval of compensation for named executive officers as disclosed in the 28 April 2026 proxy statement.

4. General mandates authorising the board to: • Allot and issue ordinary shares and/or ADSs and/or resell treasury shares up to 10% of the company’s issued ordinary share capital (excluding treasury shares) as of the AGM date; • Repurchase ordinary shares and/or ADSs up to 10% of the issued ordinary share capital (excluding treasury shares) as of the AGM date.

Registered shareholders can vote by mail, internet, virtually during the meeting or in person. Internet voting closes at 11:59 p.m. U.S. Eastern Time on 14 June 2026, while mailed proxy cards must be received by 11:59 a.m. U.S. Eastern Time on 16 June 2026. Beneficial owners should follow instructions from their brokers or banks to obtain a legal proxy if they wish to vote at the meeting.

The board currently comprises Dr. Samantha Du, Mr. Leon O. Moulder Jr. and seven independent directors. Any additional business properly presented may also be considered at the AGM or any adjournment or postponement thereof.