Antengene Corporation Limited (Antengene) disclosed a minor adjustment to its share capital following a buyback executed on 15 July 2026.

Key Transaction • On-market repurchase of 14,000 ordinary shares at HKD 4.41 each, totalling HKD 61,740. • The purchased shares were retained as treasury stock; none have been cancelled.

Impact on Share Capital • Issued shares (excluding treasury shares) decreased from 678.64 million to 678.63 million, a 0.0021% reduction. • Treasury shares rose from 803,000 to 817,000. • Total issued shares remained unchanged at 679.45 million.

Repurchase Mandate Utilisation • The buyback falls under a mandate granted on 10 June 2026 authorising up to 67.92 million shares. • Cumulative repurchases under this mandate now stand at 614,500 shares, equal to 0.0905% of the issued share base on the mandate date.

Regulatory Timeline • A 30-day moratorium on new share issues or treasury share sales is in place until 14 August 2026, in line with Hong Kong Listing Rules.

Governance Confirmation Chairman Dr. Jay Mei confirmed that the repurchase complied with Main Board Rule 10.06 and that no material changes have been made to the previously filed explanatory statement.