On August 20, 2026, RTW Fund Group GP, LLC bought 12.31 million shares of Zai Lab Ltd. at an average of USD 26 per share, involving about USD 319.99 million.
Prior to the acquisition, RTW Fund Group GP, LLC's long position in Zai Lab Ltd. was 81.58 million shares, representing 7.17%; following the acquisition, the holding changed to 93.89 million shares, with the long position ratio rising to 8.25%.