Jacobio-B (JACOBIO PHARMACEUTICALS GROUP CO., LTD.) disclosed that it repurchased 27,600 ordinary shares on 9 June 2026 via on-market transactions on the Hong Kong Stock Exchange.

The buy-back was executed at prices ranging between HK$4.33 and HK$4.35 per share, resulting in a volume-weighted average price of HK$4.34 and a total consideration of HK$0.12 million.

Key post-transaction metrics:

• Outstanding shares (excluding treasury shares) decreased marginally to 783.70 million, down 0.00352 %. • Treasury shares increased to 8.06 million. • Total issued shares remained at 791.76 million.

The repurchase falls under the mandate approved on 5 June 2026, which authorises the company to buy back up to 78.37 million shares. Cumulative purchases under this mandate now account for 0.00352 % of the company’s issued share capital as at the mandate date.

In accordance with Hong Kong listing rules, Jacobio-B is subject to a moratorium on issuing new shares or disposing of treasury shares until 9 July 2026.