GigaDevice Semiconductor Inc. (GIGADEVICE; HKEX: 03986) reported a share repurchase conducted on 21 August 2026, according to its Next Day Disclosure Return filed with the Hong Kong Stock Exchange.

• Transaction scope: 247,000 A-shares were repurchased on the Shanghai Stock Exchange and marked for cancellation. • Capital proportion: The repurchased volume equals 0.04% of GIGADEVICE’s 668.49 million issued shares (excluding treasury shares) as of the same date. • Pricing details: Shares were bought back at prices ranging from RMB 400.30 to RMB 409.95, with a volume-weighted average repurchase price of RMB 406.48. • Cash outlay: Total consideration paid reached RMB 100.40 million. • Post-transaction share count: As the shares have not yet been cancelled, the company’s issued share capital remains unchanged at 668.49 million shares. Cancellation will reduce the total once completed.

The company confirmed that the repurchase was duly authorised by its board, executed in compliance with all applicable listing rules and regulations, and funded in full. No new shares will be issued, nor will treasury shares be sold, for 30 days following the buyback, in line with Hong Kong listing requirements.