Sources: Alibaba raised $4.5B from a convertible bond sale in one of the largest such offerings in recent years, after rival JD.com's recent $1.75B offering (Bloomberg)

Bloomberg:

Sources: Alibaba raised $4.5B from a convertible bond sale in one of the largest such offerings in recent years, after rival JD.com’s recent $1.75B offering  —  – Company to immediately repurchase 14.8 million of its ADRs  — Move is to obtain cash offshore on favorable terms: Choi