X0306 4 2022-02-04 0 0001704292 Zai Lab Ltd ZLAB 0001240357 DIEKMAN JOHN D C/O ZAI LAB LIMITED 4560 JINKE ROAD, BLDG 1, 4TH FLOOR PUDONG, SHANGHAI F4 201210 CHINA 1 0 0 0 Ordinary Shares 2022-02-04 4 S 0 1000 50.17 D 67615 D The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person, dated March 31, 2021, may terminate on May 5, 2022 and is intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. The Power of Attorney given by Mr. Diekman was previously filed with the U.S. Securities and Exchange Commission on January 4, 2021 as an exhibit to the Form 3 filed by Mr. Diekman. /s/ Bruce A. Blefeld, Attorney-in-Fact 2022-02-07