On 21 July 2026, Antengene Corporation Limited (Antengene) filed a Next Day Disclosure Return with the Hong Kong Stock Exchange, detailing a new on-market share buyback executed the same day.

The company repurchased 244,500 ordinary shares on the Exchange at prices ranging from HKD3.95 to HKD4.24 per share, translating to a volume-weighted average cost of HKD4.11. The total consideration amounted to approximately HKD1.00 million. All repurchased shares have been retained as treasury shares; none were cancelled.

Following the transaction, outstanding shares (excluding treasury stock) decreased by 0.04% to 677.42 million, while treasury shares increased to 2.03 million. The total issued share count remained unchanged at 679.45 million.

The buyback forms part of a mandate approved on 10 June 2026, which authorises Antengene to repurchase up to 67.92 million shares. Cumulative repurchases under this mandate now stand at 1.83 million shares, representing 0.27% of the company’s issued share base at the mandate date. In line with Hong Kong listing rules, Antengene is restricted from issuing new shares or disposing of treasury shares until 20 August 2026.