HONG KONG – Hong Kong-based cancer drugmaker Hutchison China Meditech Ltd. (Chi-Med) filed its third IPO, seeking a listing on the Hong Kong Exchange (HKEX) after getting listed on the AIM market of the London Stock Exchange and on Nasdaq. The HK IPO follows a major milestone for the company, which won regulatory approval in China for innovative cancer drug Elunate (fruquintinib) last year.